./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-figure1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-figure1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 33cf58268090640beca4b79cf718f2ee2d6c29dee3e4b3e200f8bf0a7c295123 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:59:28,700 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:59:28,801 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-06 22:59:28,807 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:59:28,808 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:59:28,834 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:59:28,835 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:59:28,835 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:59:28,836 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:59:28,837 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:59:28,838 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:59:28,838 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:59:28,839 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:59:28,840 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:59:28,840 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:59:28,841 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:59:28,841 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:59:28,842 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:59:28,843 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 22:59:28,843 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 22:59:28,844 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 22:59:28,845 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:59:28,845 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 22:59:28,846 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:59:28,847 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:59:28,847 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:59:28,848 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:59:28,849 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:59:28,849 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:59:28,850 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:59:28,851 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:59:28,851 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:59:28,852 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:59:28,852 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:59:28,853 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:59:28,853 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:59:28,854 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:59:28,854 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:59:28,855 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_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 33cf58268090640beca4b79cf718f2ee2d6c29dee3e4b3e200f8bf0a7c295123 [2023-11-06 22:59:29,110 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:59:29,160 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:59:29,164 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:59:29,165 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:59:29,167 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:59:29,169 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-figure1.wvr.c [2023-11-06 22:59:32,880 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:59:33,192 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:59:33,192 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/sv-benchmarks/c/weaver/popl20-figure1.wvr.c [2023-11-06 22:59:33,210 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/data/08deb93ca/f0a1dd13a68442cc88ed46b906ce1512/FLAG1168cb1ef [2023-11-06 22:59:33,234 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/data/08deb93ca/f0a1dd13a68442cc88ed46b906ce1512 [2023-11-06 22:59:33,242 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:59:33,246 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:59:33,249 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:59:33,250 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:59:33,257 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:59:33,258 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:59:33" (1/1) ... [2023-11-06 22:59:33,259 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17ee8f9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:59:33, skipping insertion in model container [2023-11-06 22:59:33,259 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:59:33" (1/1) ... [2023-11-06 22:59:33,294 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:59:33,501 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:59:33,512 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:59:33,530 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:59:33,540 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:59:33,540 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:59:33,548 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:59:33,549 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:59:33 WrapperNode [2023-11-06 22:59:33,549 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:59:33,550 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:59:33,550 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:59:33,550 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:59:33,559 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:59:33" (1/1) ... [2023-11-06 22:59:33,567 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:59:33" (1/1) ... [2023-11-06 22:59:33,589 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 71 [2023-11-06 22:59:33,589 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:59:33,590 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:59:33,590 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:59:33,590 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:59:33,600 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:59:33" (1/1) ... [2023-11-06 22:59:33,600 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:59:33" (1/1) ... [2023-11-06 22:59:33,603 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:59:33" (1/1) ... [2023-11-06 22:59:33,603 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:59:33" (1/1) ... [2023-11-06 22:59:33,610 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:59:33" (1/1) ... [2023-11-06 22:59:33,614 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:59:33" (1/1) ... [2023-11-06 22:59:33,616 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:59:33" (1/1) ... [2023-11-06 22:59:33,617 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:59:33" (1/1) ... [2023-11-06 22:59:33,620 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:59:33,621 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:59:33,621 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:59:33,622 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:59:33,622 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:59:33" (1/1) ... [2023-11-06 22:59:33,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:59:33,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:59:33,660 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:59:33,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:59:33,716 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:59:33,717 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:59:33,717 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:59:33,717 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:59:33,717 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:59:33,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:59:33,718 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:59:33,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:59:33,718 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 22:59:33,719 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 22:59:33,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:59:33,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:59:33,719 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:59:33,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:59:33,721 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 22:59:33,834 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:59:33,836 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:59:34,038 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:59:34,097 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:59:34,098 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-06 22:59:34,100 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:59:34 BoogieIcfgContainer [2023-11-06 22:59:34,101 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:59:34,103 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:59:34,104 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:59:34,107 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:59:34,107 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:59:33" (1/3) ... [2023-11-06 22:59:34,108 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43f3a7f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:59:34, skipping insertion in model container [2023-11-06 22:59:34,108 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:59:33" (2/3) ... [2023-11-06 22:59:34,108 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43f3a7f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:59:34, skipping insertion in model container [2023-11-06 22:59:34,108 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:59:34" (3/3) ... [2023-11-06 22:59:34,110 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1.wvr.c [2023-11-06 22:59:34,132 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:59:34,132 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-11-06 22:59:34,132 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:59:34,253 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 22:59:34,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 91 transitions, 196 flow [2023-11-06 22:59:34,371 INFO L124 PetriNetUnfolderBase]: 5/89 cut-off events. [2023-11-06 22:59:34,371 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:59:34,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 89 events. 5/89 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 88 event pairs, 0 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2023-11-06 22:59:34,377 INFO L82 GeneralOperation]: Start removeDead. Operand has 93 places, 91 transitions, 196 flow [2023-11-06 22:59:34,381 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 84 transitions, 180 flow [2023-11-06 22:59:34,388 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:59:34,398 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 86 places, 84 transitions, 180 flow [2023-11-06 22:59:34,401 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 86 places, 84 transitions, 180 flow [2023-11-06 22:59:34,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 84 transitions, 180 flow [2023-11-06 22:59:34,428 INFO L124 PetriNetUnfolderBase]: 5/84 cut-off events. [2023-11-06 22:59:34,428 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:59:34,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 84 events. 5/84 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 87 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2023-11-06 22:59:34,431 INFO L119 LiptonReduction]: Number of co-enabled transitions 748 [2023-11-06 22:59:37,886 INFO L134 LiptonReduction]: Checked pairs total: 797 [2023-11-06 22:59:37,887 INFO L136 LiptonReduction]: Total number of compositions: 83 [2023-11-06 22:59:37,925 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:59:37,939 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;@348bba84, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:59:37,939 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-11-06 22:59:37,944 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:59:37,944 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-11-06 22:59:37,945 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:59:37,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:59:37,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-06 22:59:37,947 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:59:37,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:37,956 INFO L85 PathProgramCache]: Analyzing trace with hash 368, now seen corresponding path program 1 times [2023-11-06 22:59:37,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:37,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178328569] [2023-11-06 22:59:37,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:37,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:38,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:38,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:38,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:38,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178328569] [2023-11-06 22:59:38,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178328569] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:59:38,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:59:38,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-06 22:59:38,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614630124] [2023-11-06 22:59:38,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:59:38,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:59:38,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:38,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:59:38,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:59:38,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 174 [2023-11-06 22:59:38,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 60 flow. Second operand has 2 states, 2 states have (on average 81.5) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:38,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:59:38,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 174 [2023-11-06 22:59:38,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:59:38,343 INFO L124 PetriNetUnfolderBase]: 106/169 cut-off events. [2023-11-06 22:59:38,343 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-06 22:59:38,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 351 conditions, 169 events. 106/169 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 556 event pairs, 45 based on Foata normal form. 0/82 useless extension candidates. Maximal degree in co-relation 277. Up to 167 conditions per place. [2023-11-06 22:59:38,351 INFO L140 encePairwiseOnDemand]: 171/174 looper letters, 19 selfloop transitions, 0 changer transitions 0/21 dead transitions. [2023-11-06 22:59:38,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 21 transitions, 92 flow [2023-11-06 22:59:38,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:59:38,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-06 22:59:38,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 184 transitions. [2023-11-06 22:59:38,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5287356321839081 [2023-11-06 22:59:38,378 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 184 transitions. [2023-11-06 22:59:38,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 184 transitions. [2023-11-06 22:59:38,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:59:38,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 184 transitions. [2023-11-06 22:59:38,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 92.0) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:38,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:38,407 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:38,410 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 60 flow. Second operand 2 states and 184 transitions. [2023-11-06 22:59:38,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 21 transitions, 92 flow [2023-11-06 22:59:38,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 21 transitions, 84 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-06 22:59:38,417 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 46 flow [2023-11-06 22:59:38,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=46, PETRI_PLACES=23, PETRI_TRANSITIONS=21} [2023-11-06 22:59:38,425 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2023-11-06 22:59:38,426 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 46 flow [2023-11-06 22:59:38,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 81.5) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:38,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:59:38,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 22:59:38,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:59:38,428 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:59:38,428 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:38,428 INFO L85 PathProgramCache]: Analyzing trace with hash 360950, now seen corresponding path program 1 times [2023-11-06 22:59:38,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:38,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939212797] [2023-11-06 22:59:38,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:38,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:38,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:38,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:38,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:38,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939212797] [2023-11-06 22:59:38,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939212797] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:59:38,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:59:38,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:59:38,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795009167] [2023-11-06 22:59:38,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:59:38,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:59:38,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:38,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:59:38,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:59:38,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 174 [2023-11-06 22:59:38,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 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) [2023-11-06 22:59:38,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:59:38,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 174 [2023-11-06 22:59:38,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:59:38,749 INFO L124 PetriNetUnfolderBase]: 99/156 cut-off events. [2023-11-06 22:59:38,749 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:59:38,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 156 events. 99/156 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 484 event pairs, 42 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 313. Up to 153 conditions per place. [2023-11-06 22:59:38,752 INFO L140 encePairwiseOnDemand]: 171/174 looper letters, 16 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2023-11-06 22:59:38,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 76 flow [2023-11-06 22:59:38,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:59:38,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:59:38,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 232 transitions. [2023-11-06 22:59:38,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-11-06 22:59:38,757 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 232 transitions. [2023-11-06 22:59:38,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 232 transitions. [2023-11-06 22:59:38,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:59:38,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 232 transitions. [2023-11-06 22:59:38,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:38,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 174.0) internal successors, (696), 4 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:38,764 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 174.0) internal successors, (696), 4 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:38,764 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 46 flow. Second operand 3 states and 232 transitions. [2023-11-06 22:59:38,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 19 transitions, 76 flow [2023-11-06 22:59:38,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 19 transitions, 76 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:59:38,766 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 44 flow [2023-11-06 22:59:38,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2023-11-06 22:59:38,768 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2023-11-06 22:59:38,768 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 44 flow [2023-11-06 22:59:38,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 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) [2023-11-06 22:59:38,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:59:38,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 22:59:38,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:59:38,769 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:59:38,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:38,770 INFO L85 PathProgramCache]: Analyzing trace with hash 360948, now seen corresponding path program 1 times [2023-11-06 22:59:38,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:38,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105565515] [2023-11-06 22:59:38,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:38,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:38,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:39,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:39,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:39,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105565515] [2023-11-06 22:59:39,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105565515] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:59:39,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:59:39,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:59:39,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390660979] [2023-11-06 22:59:39,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:59:39,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:59:39,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:39,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:59:39,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:59:39,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 174 [2023-11-06 22:59:39,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:39,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:59:39,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 174 [2023-11-06 22:59:39,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:59:39,139 INFO L124 PetriNetUnfolderBase]: 92/143 cut-off events. [2023-11-06 22:59:39,140 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:59:39,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292 conditions, 143 events. 92/143 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 430 event pairs, 39 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 288. Up to 140 conditions per place. [2023-11-06 22:59:39,143 INFO L140 encePairwiseOnDemand]: 171/174 looper letters, 14 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2023-11-06 22:59:39,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 17 transitions, 70 flow [2023-11-06 22:59:39,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:59:39,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:59:39,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 242 transitions. [2023-11-06 22:59:39,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46360153256704983 [2023-11-06 22:59:39,150 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 242 transitions. [2023-11-06 22:59:39,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 242 transitions. [2023-11-06 22:59:39,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:59:39,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 242 transitions. [2023-11-06 22:59:39,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:39,155 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 174.0) internal successors, (696), 4 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:39,156 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 174.0) internal successors, (696), 4 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:39,156 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 44 flow. Second operand 3 states and 242 transitions. [2023-11-06 22:59:39,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 17 transitions, 70 flow [2023-11-06 22:59:39,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 17 transitions, 69 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:59:39,158 INFO L231 Difference]: Finished difference. Result has 22 places, 17 transitions, 41 flow [2023-11-06 22:59:39,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=39, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=41, PETRI_PLACES=22, PETRI_TRANSITIONS=17} [2023-11-06 22:59:39,160 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-11-06 22:59:39,160 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 17 transitions, 41 flow [2023-11-06 22:59:39,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:39,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:59:39,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 22:59:39,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:59:39,162 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:59:39,162 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:39,162 INFO L85 PathProgramCache]: Analyzing trace with hash 346880177, now seen corresponding path program 1 times [2023-11-06 22:59:39,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:39,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79126803] [2023-11-06 22:59:39,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:39,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:39,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:39,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:39,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:39,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79126803] [2023-11-06 22:59:39,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79126803] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:59:39,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:59:39,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:59:39,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993848802] [2023-11-06 22:59:39,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:59:39,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:59:39,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:39,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:59:39,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:59:39,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 174 [2023-11-06 22:59:39,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 41 flow. Second operand has 4 states, 4 states have (on average 68.25) internal successors, (273), 4 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:39,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:59:39,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 174 [2023-11-06 22:59:39,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:59:39,422 INFO L124 PetriNetUnfolderBase]: 70/112 cut-off events. [2023-11-06 22:59:39,424 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:59:39,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231 conditions, 112 events. 70/112 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 300 event pairs, 29 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 227. Up to 109 conditions per place. [2023-11-06 22:59:39,427 INFO L140 encePairwiseOnDemand]: 172/174 looper letters, 13 selfloop transitions, 1 changer transitions 0/16 dead transitions. [2023-11-06 22:59:39,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 16 transitions, 67 flow [2023-11-06 22:59:39,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:59:39,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:59:39,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 216 transitions. [2023-11-06 22:59:39,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41379310344827586 [2023-11-06 22:59:39,430 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 216 transitions. [2023-11-06 22:59:39,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 216 transitions. [2023-11-06 22:59:39,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:59:39,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 216 transitions. [2023-11-06 22:59:39,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 72.0) internal successors, (216), 3 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) [2023-11-06 22:59:39,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 174.0) internal successors, (696), 4 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:39,437 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 174.0) internal successors, (696), 4 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:39,437 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 41 flow. Second operand 3 states and 216 transitions. [2023-11-06 22:59:39,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 16 transitions, 67 flow [2023-11-06 22:59:39,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 16 transitions, 66 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:59:39,439 INFO L231 Difference]: Finished difference. Result has 22 places, 16 transitions, 40 flow [2023-11-06 22:59:39,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=40, PETRI_PLACES=22, PETRI_TRANSITIONS=16} [2023-11-06 22:59:39,441 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-11-06 22:59:39,442 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 16 transitions, 40 flow [2023-11-06 22:59:39,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.25) internal successors, (273), 4 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:39,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:59:39,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 22:59:39,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 22:59:39,443 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:59:39,444 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:39,444 INFO L85 PathProgramCache]: Analyzing trace with hash 346880178, now seen corresponding path program 1 times [2023-11-06 22:59:39,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:39,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321900408] [2023-11-06 22:59:39,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:39,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:39,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:39,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:39,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:39,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321900408] [2023-11-06 22:59:39,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321900408] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:59:39,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:59:39,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:59:39,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258352916] [2023-11-06 22:59:39,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:59:39,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:59:39,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:39,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:59:39,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:59:39,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 174 [2023-11-06 22:59:39,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 16 transitions, 40 flow. Second operand has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:39,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:59:39,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 174 [2023-11-06 22:59:39,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:59:39,639 INFO L124 PetriNetUnfolderBase]: 48/81 cut-off events. [2023-11-06 22:59:39,639 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:59:39,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170 conditions, 81 events. 48/81 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 185 event pairs, 19 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 166. Up to 78 conditions per place. [2023-11-06 22:59:39,641 INFO L140 encePairwiseOnDemand]: 172/174 looper letters, 12 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2023-11-06 22:59:39,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 15 transitions, 64 flow [2023-11-06 22:59:39,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:59:39,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:59:39,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 230 transitions. [2023-11-06 22:59:39,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44061302681992337 [2023-11-06 22:59:39,644 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 230 transitions. [2023-11-06 22:59:39,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 230 transitions. [2023-11-06 22:59:39,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:59:39,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 230 transitions. [2023-11-06 22:59:39,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:39,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 174.0) internal successors, (696), 4 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:39,649 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 174.0) internal successors, (696), 4 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:39,649 INFO L175 Difference]: Start difference. First operand has 22 places, 16 transitions, 40 flow. Second operand 3 states and 230 transitions. [2023-11-06 22:59:39,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 15 transitions, 64 flow [2023-11-06 22:59:39,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 15 transitions, 63 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:59:39,650 INFO L231 Difference]: Finished difference. Result has 22 places, 15 transitions, 39 flow [2023-11-06 22:59:39,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=37, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=39, PETRI_PLACES=22, PETRI_TRANSITIONS=15} [2023-11-06 22:59:39,652 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-11-06 22:59:39,652 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 15 transitions, 39 flow [2023-11-06 22:59:39,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:39,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:59:39,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:39,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 22:59:39,653 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:59:39,654 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:39,654 INFO L85 PathProgramCache]: Analyzing trace with hash -2014497666, now seen corresponding path program 1 times [2023-11-06 22:59:39,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:39,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630275188] [2023-11-06 22:59:39,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:39,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:39,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:39,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:39,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:39,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630275188] [2023-11-06 22:59:39,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630275188] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:59:39,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:59:39,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:59:39,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320161840] [2023-11-06 22:59:39,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:59:39,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:59:39,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:39,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:59:39,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:59:39,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 174 [2023-11-06 22:59:39,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 15 transitions, 39 flow. Second operand has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:39,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:59:39,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 174 [2023-11-06 22:59:39,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:59:39,781 INFO L124 PetriNetUnfolderBase]: 49/94 cut-off events. [2023-11-06 22:59:39,781 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:59:39,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198 conditions, 94 events. 49/94 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 264 event pairs, 13 based on Foata normal form. 1/68 useless extension candidates. Maximal degree in co-relation 194. Up to 65 conditions per place. [2023-11-06 22:59:39,783 INFO L140 encePairwiseOnDemand]: 170/174 looper letters, 16 selfloop transitions, 2 changer transitions 4/24 dead transitions. [2023-11-06 22:59:39,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 24 transitions, 104 flow [2023-11-06 22:59:39,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:59:39,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:59:39,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 264 transitions. [2023-11-06 22:59:39,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5057471264367817 [2023-11-06 22:59:39,786 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 264 transitions. [2023-11-06 22:59:39,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 264 transitions. [2023-11-06 22:59:39,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:59:39,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 264 transitions. [2023-11-06 22:59:39,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:39,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 174.0) internal successors, (696), 4 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:39,791 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 174.0) internal successors, (696), 4 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:39,792 INFO L175 Difference]: Start difference. First operand has 22 places, 15 transitions, 39 flow. Second operand 3 states and 264 transitions. [2023-11-06 22:59:39,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 24 transitions, 104 flow [2023-11-06 22:59:39,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 24 transitions, 103 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:59:39,794 INFO L231 Difference]: Finished difference. Result has 24 places, 16 transitions, 52 flow [2023-11-06 22:59:39,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=24, PETRI_TRANSITIONS=16} [2023-11-06 22:59:39,795 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -5 predicate places. [2023-11-06 22:59:39,796 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 16 transitions, 52 flow [2023-11-06 22:59:39,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:39,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:59:39,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:39,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 22:59:39,797 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:59:39,798 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:39,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1156790580, now seen corresponding path program 1 times [2023-11-06 22:59:39,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:39,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562084003] [2023-11-06 22:59:39,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:39,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:39,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:39,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:39,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:39,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562084003] [2023-11-06 22:59:39,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562084003] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:59:39,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:59:39,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:59:39,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555472494] [2023-11-06 22:59:39,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:59:39,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:59:39,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:39,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:59:39,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:59:39,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 174 [2023-11-06 22:59:39,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 16 transitions, 52 flow. Second operand has 5 states, 5 states have (on average 73.8) internal successors, (369), 5 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:39,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:59:39,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 174 [2023-11-06 22:59:39,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:59:40,036 INFO L124 PetriNetUnfolderBase]: 77/149 cut-off events. [2023-11-06 22:59:40,037 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-11-06 22:59:40,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 356 conditions, 149 events. 77/149 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 438 event pairs, 24 based on Foata normal form. 2/151 useless extension candidates. Maximal degree in co-relation 351. Up to 78 conditions per place. [2023-11-06 22:59:40,039 INFO L140 encePairwiseOnDemand]: 168/174 looper letters, 30 selfloop transitions, 3 changer transitions 3/36 dead transitions. [2023-11-06 22:59:40,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 36 transitions, 181 flow [2023-11-06 22:59:40,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:59:40,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:59:40,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 389 transitions. [2023-11-06 22:59:40,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4471264367816092 [2023-11-06 22:59:40,042 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 389 transitions. [2023-11-06 22:59:40,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 389 transitions. [2023-11-06 22:59:40,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:59:40,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 389 transitions. [2023-11-06 22:59:40,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 77.8) internal successors, (389), 5 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:40,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 174.0) internal successors, (1044), 6 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) [2023-11-06 22:59:40,048 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 174.0) internal successors, (1044), 6 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) [2023-11-06 22:59:40,048 INFO L175 Difference]: Start difference. First operand has 24 places, 16 transitions, 52 flow. Second operand 5 states and 389 transitions. [2023-11-06 22:59:40,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 36 transitions, 181 flow [2023-11-06 22:59:40,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 36 transitions, 177 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:59:40,050 INFO L231 Difference]: Finished difference. Result has 30 places, 18 transitions, 76 flow [2023-11-06 22:59:40,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=76, PETRI_PLACES=30, PETRI_TRANSITIONS=18} [2023-11-06 22:59:40,052 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 1 predicate places. [2023-11-06 22:59:40,052 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 18 transitions, 76 flow [2023-11-06 22:59:40,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 73.8) internal successors, (369), 5 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:40,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:59:40,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:40,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 22:59:40,053 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:59:40,054 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:40,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1122942728, now seen corresponding path program 2 times [2023-11-06 22:59:40,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:40,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283618500] [2023-11-06 22:59:40,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:40,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:40,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:40,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:40,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:40,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283618500] [2023-11-06 22:59:40,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283618500] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:59:40,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859745528] [2023-11-06 22:59:40,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:59:40,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:40,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:59:40,189 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:59:40,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:59:40,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:59:40,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:59:40,296 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:59:40,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:40,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:40,440 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:59:40,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:40,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859745528] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:59:40,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:59:40,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-11-06 22:59:40,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912853787] [2023-11-06 22:59:40,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:59:40,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:59:40,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:40,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:59:40,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:59:40,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 174 [2023-11-06 22:59:40,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 18 transitions, 76 flow. Second operand has 8 states, 8 states have (on average 71.625) internal successors, (573), 8 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:40,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:59:40,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 174 [2023-11-06 22:59:40,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:59:40,711 INFO L124 PetriNetUnfolderBase]: 82/158 cut-off events. [2023-11-06 22:59:40,711 INFO L125 PetriNetUnfolderBase]: For 131/131 co-relation queries the response was YES. [2023-11-06 22:59:40,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 491 conditions, 158 events. 82/158 cut-off events. For 131/131 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 478 event pairs, 13 based on Foata normal form. 6/164 useless extension candidates. Maximal degree in co-relation 483. Up to 53 conditions per place. [2023-11-06 22:59:40,714 INFO L140 encePairwiseOnDemand]: 168/174 looper letters, 35 selfloop transitions, 8 changer transitions 5/48 dead transitions. [2023-11-06 22:59:40,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 48 transitions, 286 flow [2023-11-06 22:59:40,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:59:40,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:59:40,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 529 transitions. [2023-11-06 22:59:40,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4343185550082102 [2023-11-06 22:59:40,717 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 529 transitions. [2023-11-06 22:59:40,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 529 transitions. [2023-11-06 22:59:40,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:59:40,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 529 transitions. [2023-11-06 22:59:40,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 75.57142857142857) internal successors, (529), 7 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:40,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 174.0) internal successors, (1392), 8 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:40,724 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 174.0) internal successors, (1392), 8 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:40,724 INFO L175 Difference]: Start difference. First operand has 30 places, 18 transitions, 76 flow. Second operand 7 states and 529 transitions. [2023-11-06 22:59:40,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 48 transitions, 286 flow [2023-11-06 22:59:40,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 48 transitions, 262 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-11-06 22:59:40,733 INFO L231 Difference]: Finished difference. Result has 37 places, 23 transitions, 127 flow [2023-11-06 22:59:40,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=127, PETRI_PLACES=37, PETRI_TRANSITIONS=23} [2023-11-06 22:59:40,734 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 8 predicate places. [2023-11-06 22:59:40,734 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 23 transitions, 127 flow [2023-11-06 22:59:40,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 71.625) internal successors, (573), 8 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:40,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:59:40,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:40,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:59:40,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:40,936 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:59:40,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:40,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1217447664, now seen corresponding path program 3 times [2023-11-06 22:59:40,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:40,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351226407] [2023-11-06 22:59:40,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:40,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:40,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:41,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:41,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:41,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351226407] [2023-11-06 22:59:41,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351226407] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:59:41,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:59:41,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:59:41,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300020392] [2023-11-06 22:59:41,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:59:41,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:59:41,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:41,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:59:41,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:59:41,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 174 [2023-11-06 22:59:41,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 23 transitions, 127 flow. Second operand has 5 states, 5 states have (on average 72.8) internal successors, (364), 5 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:41,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:59:41,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 174 [2023-11-06 22:59:41,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:59:41,214 INFO L124 PetriNetUnfolderBase]: 71/136 cut-off events. [2023-11-06 22:59:41,214 INFO L125 PetriNetUnfolderBase]: For 261/261 co-relation queries the response was YES. [2023-11-06 22:59:41,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 501 conditions, 136 events. 71/136 cut-off events. For 261/261 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 365 event pairs, 21 based on Foata normal form. 2/138 useless extension candidates. Maximal degree in co-relation 490. Up to 99 conditions per place. [2023-11-06 22:59:41,218 INFO L140 encePairwiseOnDemand]: 169/174 looper letters, 23 selfloop transitions, 9 changer transitions 2/34 dead transitions. [2023-11-06 22:59:41,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 34 transitions, 246 flow [2023-11-06 22:59:41,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:59:41,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:59:41,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 378 transitions. [2023-11-06 22:59:41,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43448275862068964 [2023-11-06 22:59:41,222 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 378 transitions. [2023-11-06 22:59:41,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 378 transitions. [2023-11-06 22:59:41,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:59:41,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 378 transitions. [2023-11-06 22:59:41,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 75.6) internal successors, (378), 5 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:41,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 174.0) internal successors, (1044), 6 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) [2023-11-06 22:59:41,227 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 174.0) internal successors, (1044), 6 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) [2023-11-06 22:59:41,228 INFO L175 Difference]: Start difference. First operand has 37 places, 23 transitions, 127 flow. Second operand 5 states and 378 transitions. [2023-11-06 22:59:41,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 34 transitions, 246 flow [2023-11-06 22:59:41,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 34 transitions, 230 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-11-06 22:59:41,235 INFO L231 Difference]: Finished difference. Result has 42 places, 25 transitions, 162 flow [2023-11-06 22:59:41,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=162, PETRI_PLACES=42, PETRI_TRANSITIONS=25} [2023-11-06 22:59:41,238 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 13 predicate places. [2023-11-06 22:59:41,240 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 25 transitions, 162 flow [2023-11-06 22:59:41,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 72.8) internal successors, (364), 5 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:41,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:59:41,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:41,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 22:59:41,242 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:59:41,242 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:41,243 INFO L85 PathProgramCache]: Analyzing trace with hash -2115624324, now seen corresponding path program 4 times [2023-11-06 22:59:41,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:41,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275638378] [2023-11-06 22:59:41,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:41,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:41,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:41,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:41,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:41,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275638378] [2023-11-06 22:59:41,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275638378] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:59:41,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:59:41,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:59:41,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544581841] [2023-11-06 22:59:41,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:59:41,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:59:41,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:41,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:59:41,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:59:41,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 174 [2023-11-06 22:59:41,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 25 transitions, 162 flow. Second operand has 5 states, 5 states have (on average 72.8) internal successors, (364), 5 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:41,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:59:41,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 174 [2023-11-06 22:59:41,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:59:41,522 INFO L124 PetriNetUnfolderBase]: 68/131 cut-off events. [2023-11-06 22:59:41,522 INFO L125 PetriNetUnfolderBase]: For 415/415 co-relation queries the response was YES. [2023-11-06 22:59:41,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 545 conditions, 131 events. 68/131 cut-off events. For 415/415 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 340 event pairs, 28 based on Foata normal form. 2/133 useless extension candidates. Maximal degree in co-relation 531. Up to 116 conditions per place. [2023-11-06 22:59:41,525 INFO L140 encePairwiseOnDemand]: 170/174 looper letters, 25 selfloop transitions, 6 changer transitions 2/33 dead transitions. [2023-11-06 22:59:41,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 33 transitions, 271 flow [2023-11-06 22:59:41,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:59:41,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:59:41,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 375 transitions. [2023-11-06 22:59:41,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43103448275862066 [2023-11-06 22:59:41,528 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 375 transitions. [2023-11-06 22:59:41,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 375 transitions. [2023-11-06 22:59:41,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:59:41,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 375 transitions. [2023-11-06 22:59:41,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 75.0) internal successors, (375), 5 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:41,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 174.0) internal successors, (1044), 6 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) [2023-11-06 22:59:41,534 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 174.0) internal successors, (1044), 6 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) [2023-11-06 22:59:41,534 INFO L175 Difference]: Start difference. First operand has 42 places, 25 transitions, 162 flow. Second operand 5 states and 375 transitions. [2023-11-06 22:59:41,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 33 transitions, 271 flow [2023-11-06 22:59:41,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 33 transitions, 247 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-11-06 22:59:41,540 INFO L231 Difference]: Finished difference. Result has 44 places, 27 transitions, 182 flow [2023-11-06 22:59:41,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=182, PETRI_PLACES=44, PETRI_TRANSITIONS=27} [2023-11-06 22:59:41,542 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 15 predicate places. [2023-11-06 22:59:41,542 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 27 transitions, 182 flow [2023-11-06 22:59:41,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 72.8) internal successors, (364), 5 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:41,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:59:41,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:41,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-06 22:59:41,544 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:59:41,544 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:41,545 INFO L85 PathProgramCache]: Analyzing trace with hash -258149822, now seen corresponding path program 5 times [2023-11-06 22:59:41,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:41,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629513432] [2023-11-06 22:59:41,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:41,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:41,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:41,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:41,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:41,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629513432] [2023-11-06 22:59:41,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629513432] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:59:41,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472104510] [2023-11-06 22:59:41,658 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:59:41,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:41,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:59:41,660 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:59:41,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:59:41,754 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:59:41,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:59:41,755 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:59:41,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:41,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:41,819 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:59:41,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:41,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472104510] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:59:41,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:59:41,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-06 22:59:41,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676535269] [2023-11-06 22:59:41,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:59:41,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:59:41,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:41,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:59:41,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:59:41,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 174 [2023-11-06 22:59:41,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 27 transitions, 182 flow. Second operand has 10 states, 10 states have (on average 71.5) internal successors, (715), 10 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:41,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:59:41,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 174 [2023-11-06 22:59:41,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:59:42,120 INFO L124 PetriNetUnfolderBase]: 83/156 cut-off events. [2023-11-06 22:59:42,121 INFO L125 PetriNetUnfolderBase]: For 455/455 co-relation queries the response was YES. [2023-11-06 22:59:42,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 638 conditions, 156 events. 83/156 cut-off events. For 455/455 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 441 event pairs, 14 based on Foata normal form. 6/162 useless extension candidates. Maximal degree in co-relation 623. Up to 82 conditions per place. [2023-11-06 22:59:42,124 INFO L140 encePairwiseOnDemand]: 168/174 looper letters, 39 selfloop transitions, 17 changer transitions 0/56 dead transitions. [2023-11-06 22:59:42,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 56 transitions, 420 flow [2023-11-06 22:59:42,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:59:42,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 22:59:42,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 740 transitions. [2023-11-06 22:59:42,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42528735632183906 [2023-11-06 22:59:42,129 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 740 transitions. [2023-11-06 22:59:42,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 740 transitions. [2023-11-06 22:59:42,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:59:42,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 740 transitions. [2023-11-06 22:59:42,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 74.0) internal successors, (740), 10 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:42,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 174.0) internal successors, (1914), 11 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:42,138 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 174.0) internal successors, (1914), 11 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:42,139 INFO L175 Difference]: Start difference. First operand has 44 places, 27 transitions, 182 flow. Second operand 10 states and 740 transitions. [2023-11-06 22:59:42,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 56 transitions, 420 flow [2023-11-06 22:59:42,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 56 transitions, 404 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-06 22:59:42,144 INFO L231 Difference]: Finished difference. Result has 54 places, 34 transitions, 273 flow [2023-11-06 22:59:42,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=273, PETRI_PLACES=54, PETRI_TRANSITIONS=34} [2023-11-06 22:59:42,146 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 25 predicate places. [2023-11-06 22:59:42,146 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 34 transitions, 273 flow [2023-11-06 22:59:42,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 71.5) internal successors, (715), 10 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:42,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:59:42,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:42,156 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-06 22:59:42,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 22:59:42,358 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:59:42,358 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:42,359 INFO L85 PathProgramCache]: Analyzing trace with hash 385684118, now seen corresponding path program 6 times [2023-11-06 22:59:42,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:42,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819472679] [2023-11-06 22:59:42,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:42,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:42,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:42,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:42,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:42,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819472679] [2023-11-06 22:59:42,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819472679] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:59:42,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187773388] [2023-11-06 22:59:42,445 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:59:42,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:42,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:59:42,447 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:59:42,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:59:42,547 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-06 22:59:42,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:59:42,549 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:59:42,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:42,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:42,602 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:59:42,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:42,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187773388] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:59:42,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:59:42,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-06 22:59:42,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284247164] [2023-11-06 22:59:42,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:59:42,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:59:42,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:42,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:59:42,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:59:42,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 174 [2023-11-06 22:59:42,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 34 transitions, 273 flow. Second operand has 10 states, 10 states have (on average 71.4) internal successors, (714), 10 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:42,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:59:42,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 174 [2023-11-06 22:59:42,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:59:42,881 INFO L124 PetriNetUnfolderBase]: 75/140 cut-off events. [2023-11-06 22:59:42,881 INFO L125 PetriNetUnfolderBase]: For 581/581 co-relation queries the response was YES. [2023-11-06 22:59:42,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 650 conditions, 140 events. 75/140 cut-off events. For 581/581 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 366 event pairs, 18 based on Foata normal form. 6/146 useless extension candidates. Maximal degree in co-relation 631. Up to 90 conditions per place. [2023-11-06 22:59:42,884 INFO L140 encePairwiseOnDemand]: 168/174 looper letters, 30 selfloop transitions, 15 changer transitions 1/46 dead transitions. [2023-11-06 22:59:42,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 46 transitions, 416 flow [2023-11-06 22:59:42,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:59:42,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:59:42,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 449 transitions. [2023-11-06 22:59:42,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43007662835249044 [2023-11-06 22:59:42,887 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 449 transitions. [2023-11-06 22:59:42,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 449 transitions. [2023-11-06 22:59:42,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:59:42,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 449 transitions. [2023-11-06 22:59:42,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 74.83333333333333) internal successors, (449), 6 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:42,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 174.0) internal successors, (1218), 7 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:42,894 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 174.0) internal successors, (1218), 7 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:42,894 INFO L175 Difference]: Start difference. First operand has 54 places, 34 transitions, 273 flow. Second operand 6 states and 449 transitions. [2023-11-06 22:59:42,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 46 transitions, 416 flow [2023-11-06 22:59:42,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 46 transitions, 372 flow, removed 8 selfloop flow, removed 5 redundant places. [2023-11-06 22:59:42,901 INFO L231 Difference]: Finished difference. Result has 55 places, 35 transitions, 268 flow [2023-11-06 22:59:42,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=268, PETRI_PLACES=55, PETRI_TRANSITIONS=35} [2023-11-06 22:59:42,902 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 26 predicate places. [2023-11-06 22:59:42,903 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 35 transitions, 268 flow [2023-11-06 22:59:42,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 71.4) internal successors, (714), 10 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:42,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:59:42,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:42,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:59:43,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 22:59:43,112 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:59:43,112 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:43,113 INFO L85 PathProgramCache]: Analyzing trace with hash -870515660, now seen corresponding path program 1 times [2023-11-06 22:59:43,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:43,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265528613] [2023-11-06 22:59:43,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:43,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:43,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:43,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:59:43,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:43,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265528613] [2023-11-06 22:59:43,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265528613] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:59:43,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798753630] [2023-11-06 22:59:43,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:43,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:43,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:59:43,232 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:59:43,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:59:43,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:43,331 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:59:43,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:43,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:59:43,367 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:59:43,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:59:43,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798753630] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:59:43,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:59:43,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 2 [2023-11-06 22:59:43,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375705092] [2023-11-06 22:59:43,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:59:43,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:59:43,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:43,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:59:43,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:59:43,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 174 [2023-11-06 22:59:43,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 35 transitions, 268 flow. Second operand has 4 states, 4 states have (on average 83.25) internal successors, (333), 4 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:43,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:59:43,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 174 [2023-11-06 22:59:43,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:59:43,508 INFO L124 PetriNetUnfolderBase]: 122/230 cut-off events. [2023-11-06 22:59:43,509 INFO L125 PetriNetUnfolderBase]: For 650/660 co-relation queries the response was YES. [2023-11-06 22:59:43,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 990 conditions, 230 events. 122/230 cut-off events. For 650/660 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 781 event pairs, 8 based on Foata normal form. 15/243 useless extension candidates. Maximal degree in co-relation 970. Up to 113 conditions per place. [2023-11-06 22:59:43,513 INFO L140 encePairwiseOnDemand]: 170/174 looper letters, 38 selfloop transitions, 11 changer transitions 10/65 dead transitions. [2023-11-06 22:59:43,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 65 transitions, 557 flow [2023-11-06 22:59:43,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:59:43,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:59:43,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 355 transitions. [2023-11-06 22:59:43,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5100574712643678 [2023-11-06 22:59:43,516 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 355 transitions. [2023-11-06 22:59:43,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 355 transitions. [2023-11-06 22:59:43,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:59:43,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 355 transitions. [2023-11-06 22:59:43,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 88.75) internal successors, (355), 4 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:43,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 174.0) internal successors, (870), 5 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:43,521 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 174.0) internal successors, (870), 5 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:43,521 INFO L175 Difference]: Start difference. First operand has 55 places, 35 transitions, 268 flow. Second operand 4 states and 355 transitions. [2023-11-06 22:59:43,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 65 transitions, 557 flow [2023-11-06 22:59:43,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 65 transitions, 454 flow, removed 19 selfloop flow, removed 9 redundant places. [2023-11-06 22:59:43,528 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 307 flow [2023-11-06 22:59:43,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=307, PETRI_PLACES=50, PETRI_TRANSITIONS=42} [2023-11-06 22:59:43,530 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 21 predicate places. [2023-11-06 22:59:43,530 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 307 flow [2023-11-06 22:59:43,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 83.25) internal successors, (333), 4 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:43,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:59:43,531 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:43,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:59:43,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 22:59:43,738 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:59:43,738 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:43,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1204313056, now seen corresponding path program 2 times [2023-11-06 22:59:43,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:43,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145199817] [2023-11-06 22:59:43,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:43,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:43,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:43,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:43,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:43,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145199817] [2023-11-06 22:59:43,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145199817] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:59:43,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066941125] [2023-11-06 22:59:43,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:59:43,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:43,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:59:43,845 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:59:43,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:59:43,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:59:43,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:59:43,937 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:59:43,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:44,000 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:44,000 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:59:44,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:44,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066941125] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:59:44,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:59:44,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-06 22:59:44,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124875280] [2023-11-06 22:59:44,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:59:44,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 22:59:44,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:44,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 22:59:44,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:59:44,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 174 [2023-11-06 22:59:44,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 42 transitions, 307 flow. Second operand has 11 states, 11 states have (on average 71.27272727272727) internal successors, (784), 11 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:44,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:59:44,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 174 [2023-11-06 22:59:44,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:59:44,405 INFO L124 PetriNetUnfolderBase]: 150/293 cut-off events. [2023-11-06 22:59:44,405 INFO L125 PetriNetUnfolderBase]: For 536/536 co-relation queries the response was YES. [2023-11-06 22:59:44,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1202 conditions, 293 events. 150/293 cut-off events. For 536/536 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1126 event pairs, 11 based on Foata normal form. 6/299 useless extension candidates. Maximal degree in co-relation 1186. Up to 95 conditions per place. [2023-11-06 22:59:44,410 INFO L140 encePairwiseOnDemand]: 168/174 looper letters, 53 selfloop transitions, 23 changer transitions 10/86 dead transitions. [2023-11-06 22:59:44,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 86 transitions, 696 flow [2023-11-06 22:59:44,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:59:44,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 22:59:44,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 750 transitions. [2023-11-06 22:59:44,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43103448275862066 [2023-11-06 22:59:44,415 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 750 transitions. [2023-11-06 22:59:44,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 750 transitions. [2023-11-06 22:59:44,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:59:44,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 750 transitions. [2023-11-06 22:59:44,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 75.0) internal successors, (750), 10 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:44,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 174.0) internal successors, (1914), 11 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:44,424 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 174.0) internal successors, (1914), 11 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:44,424 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 307 flow. Second operand 10 states and 750 transitions. [2023-11-06 22:59:44,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 86 transitions, 696 flow [2023-11-06 22:59:44,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 86 transitions, 680 flow, removed 8 selfloop flow, removed 0 redundant places. [2023-11-06 22:59:44,434 INFO L231 Difference]: Finished difference. Result has 65 places, 51 transitions, 468 flow [2023-11-06 22:59:44,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=468, PETRI_PLACES=65, PETRI_TRANSITIONS=51} [2023-11-06 22:59:44,435 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 36 predicate places. [2023-11-06 22:59:44,435 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 51 transitions, 468 flow [2023-11-06 22:59:44,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 71.27272727272727) internal successors, (784), 11 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:44,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:59:44,436 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:44,446 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-06 22:59:44,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 22:59:44,642 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:59:44,642 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:44,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1037154004, now seen corresponding path program 3 times [2023-11-06 22:59:44,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:44,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996258538] [2023-11-06 22:59:44,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:44,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:44,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:44,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:44,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:44,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996258538] [2023-11-06 22:59:44,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996258538] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:59:44,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596030668] [2023-11-06 22:59:44,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:59:44,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:44,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:59:44,791 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:59:44,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:59:44,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 22:59:44,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:59:44,880 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:59:44,881 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:44,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:44,946 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:59:44,993 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:44,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596030668] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:59:44,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:59:44,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-06 22:59:44,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957605854] [2023-11-06 22:59:44,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:59:44,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:59:44,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:44,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:59:44,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:59:45,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 174 [2023-11-06 22:59:45,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 51 transitions, 468 flow. Second operand has 12 states, 12 states have (on average 71.0) internal successors, (852), 12 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:45,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:59:45,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 174 [2023-11-06 22:59:45,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:59:45,369 INFO L124 PetriNetUnfolderBase]: 193/339 cut-off events. [2023-11-06 22:59:45,370 INFO L125 PetriNetUnfolderBase]: For 1430/1430 co-relation queries the response was YES. [2023-11-06 22:59:45,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1736 conditions, 339 events. 193/339 cut-off events. For 1430/1430 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1188 event pairs, 30 based on Foata normal form. 12/351 useless extension candidates. Maximal degree in co-relation 1713. Up to 157 conditions per place. [2023-11-06 22:59:45,374 INFO L140 encePairwiseOnDemand]: 168/174 looper letters, 53 selfloop transitions, 44 changer transitions 1/98 dead transitions. [2023-11-06 22:59:45,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 98 transitions, 1021 flow [2023-11-06 22:59:45,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:59:45,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-06 22:59:45,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 959 transitions. [2023-11-06 22:59:45,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4239610963748895 [2023-11-06 22:59:45,379 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 959 transitions. [2023-11-06 22:59:45,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 959 transitions. [2023-11-06 22:59:45,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:59:45,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 959 transitions. [2023-11-06 22:59:45,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 73.76923076923077) internal successors, (959), 13 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:45,389 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 174.0) internal successors, (2436), 14 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:45,390 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 174.0) internal successors, (2436), 14 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:45,390 INFO L175 Difference]: Start difference. First operand has 65 places, 51 transitions, 468 flow. Second operand 13 states and 959 transitions. [2023-11-06 22:59:45,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 98 transitions, 1021 flow [2023-11-06 22:59:45,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 98 transitions, 959 flow, removed 24 selfloop flow, removed 3 redundant places. [2023-11-06 22:59:45,401 INFO L231 Difference]: Finished difference. Result has 78 places, 75 transitions, 811 flow [2023-11-06 22:59:45,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=811, PETRI_PLACES=78, PETRI_TRANSITIONS=75} [2023-11-06 22:59:45,402 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 49 predicate places. [2023-11-06 22:59:45,402 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 75 transitions, 811 flow [2023-11-06 22:59:45,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 71.0) internal successors, (852), 12 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:45,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:59:45,403 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:45,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:59:45,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 22:59:45,609 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:59:45,609 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:45,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1534893044, now seen corresponding path program 4 times [2023-11-06 22:59:45,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:45,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712378477] [2023-11-06 22:59:45,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:45,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:45,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:45,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:45,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:45,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712378477] [2023-11-06 22:59:45,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712378477] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:59:45,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274700918] [2023-11-06 22:59:45,764 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:59:45,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:45,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:59:45,766 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:59:45,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:59:45,845 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:59:45,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:59:45,846 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:59:45,848 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:45,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:45,930 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:59:45,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:45,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274700918] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:59:45,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:59:45,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-06 22:59:45,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895561527] [2023-11-06 22:59:45,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:59:45,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:59:45,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:45,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:59:45,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:59:46,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 174 [2023-11-06 22:59:46,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 75 transitions, 811 flow. Second operand has 12 states, 12 states have (on average 71.33333333333333) internal successors, (856), 12 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:46,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:59:46,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 174 [2023-11-06 22:59:46,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:59:46,501 INFO L124 PetriNetUnfolderBase]: 188/350 cut-off events. [2023-11-06 22:59:46,501 INFO L125 PetriNetUnfolderBase]: For 2155/2155 co-relation queries the response was YES. [2023-11-06 22:59:46,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1986 conditions, 350 events. 188/350 cut-off events. For 2155/2155 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1315 event pairs, 23 based on Foata normal form. 26/376 useless extension candidates. Maximal degree in co-relation 1959. Up to 132 conditions per place. [2023-11-06 22:59:46,507 INFO L140 encePairwiseOnDemand]: 168/174 looper letters, 54 selfloop transitions, 52 changer transitions 1/107 dead transitions. [2023-11-06 22:59:46,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 107 transitions, 1204 flow [2023-11-06 22:59:46,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 22:59:46,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-06 22:59:46,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1182 transitions. [2023-11-06 22:59:46,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4245689655172414 [2023-11-06 22:59:46,514 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1182 transitions. [2023-11-06 22:59:46,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1182 transitions. [2023-11-06 22:59:46,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:59:46,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1182 transitions. [2023-11-06 22:59:46,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 73.875) internal successors, (1182), 16 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:46,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 174.0) internal successors, (2958), 17 states have internal predecessors, (2958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:46,529 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 174.0) internal successors, (2958), 17 states have internal predecessors, (2958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:46,529 INFO L175 Difference]: Start difference. First operand has 78 places, 75 transitions, 811 flow. Second operand 16 states and 1182 transitions. [2023-11-06 22:59:46,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 107 transitions, 1204 flow [2023-11-06 22:59:46,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 107 transitions, 1030 flow, removed 67 selfloop flow, removed 5 redundant places. [2023-11-06 22:59:46,552 INFO L231 Difference]: Finished difference. Result has 91 places, 78 transitions, 817 flow [2023-11-06 22:59:46,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=630, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=817, PETRI_PLACES=91, PETRI_TRANSITIONS=78} [2023-11-06 22:59:46,553 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 62 predicate places. [2023-11-06 22:59:46,554 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 78 transitions, 817 flow [2023-11-06 22:59:46,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 71.33333333333333) internal successors, (856), 12 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:46,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:59:46,555 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:46,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:59:46,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 22:59:46,762 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:59:46,762 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:46,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1910915022, now seen corresponding path program 5 times [2023-11-06 22:59:46,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:46,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286192702] [2023-11-06 22:59:46,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:46,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:46,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:46,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:46,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:46,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286192702] [2023-11-06 22:59:46,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286192702] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:59:46,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430354362] [2023-11-06 22:59:46,891 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:59:46,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:46,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:59:46,892 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:59:46,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:59:46,989 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:59:46,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:59:46,990 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:59:46,992 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:47,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:47,082 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:59:47,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:47,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430354362] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:59:47,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:59:47,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-06 22:59:47,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371321452] [2023-11-06 22:59:47,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:59:47,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:59:47,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:47,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:59:47,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:59:47,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 174 [2023-11-06 22:59:47,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 78 transitions, 817 flow. Second operand has 13 states, 13 states have (on average 71.3076923076923) internal successors, (927), 13 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:47,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:59:47,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 174 [2023-11-06 22:59:47,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:59:47,765 INFO L124 PetriNetUnfolderBase]: 246/452 cut-off events. [2023-11-06 22:59:47,765 INFO L125 PetriNetUnfolderBase]: For 2238/2238 co-relation queries the response was YES. [2023-11-06 22:59:47,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2566 conditions, 452 events. 246/452 cut-off events. For 2238/2238 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1828 event pairs, 29 based on Foata normal form. 10/462 useless extension candidates. Maximal degree in co-relation 2535. Up to 180 conditions per place. [2023-11-06 22:59:47,773 INFO L140 encePairwiseOnDemand]: 168/174 looper letters, 76 selfloop transitions, 54 changer transitions 0/130 dead transitions. [2023-11-06 22:59:47,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 130 transitions, 1464 flow [2023-11-06 22:59:47,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:59:47,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-06 22:59:47,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1035 transitions. [2023-11-06 22:59:47,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4248768472906404 [2023-11-06 22:59:47,782 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1035 transitions. [2023-11-06 22:59:47,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1035 transitions. [2023-11-06 22:59:47,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:59:47,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1035 transitions. [2023-11-06 22:59:47,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 73.92857142857143) internal successors, (1035), 14 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:47,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 174.0) internal successors, (2610), 15 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:47,802 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 174.0) internal successors, (2610), 15 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:47,802 INFO L175 Difference]: Start difference. First operand has 91 places, 78 transitions, 817 flow. Second operand 14 states and 1035 transitions. [2023-11-06 22:59:47,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 130 transitions, 1464 flow [2023-11-06 22:59:47,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 130 transitions, 1303 flow, removed 31 selfloop flow, removed 11 redundant places. [2023-11-06 22:59:47,822 INFO L231 Difference]: Finished difference. Result has 97 places, 102 transitions, 1115 flow [2023-11-06 22:59:47,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=713, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1115, PETRI_PLACES=97, PETRI_TRANSITIONS=102} [2023-11-06 22:59:47,823 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 68 predicate places. [2023-11-06 22:59:47,823 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 102 transitions, 1115 flow [2023-11-06 22:59:47,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 71.3076923076923) internal successors, (927), 13 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:47,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:59:47,824 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:47,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:59:48,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 22:59:48,030 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:59:48,031 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:48,031 INFO L85 PathProgramCache]: Analyzing trace with hash -49809146, now seen corresponding path program 6 times [2023-11-06 22:59:48,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:48,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725061505] [2023-11-06 22:59:48,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:48,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:48,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:48,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:48,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:48,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725061505] [2023-11-06 22:59:48,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725061505] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:59:48,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971240631] [2023-11-06 22:59:48,209 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:59:48,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:48,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:59:48,213 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:59:48,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:59:48,316 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-06 22:59:48,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:59:48,317 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:59:48,319 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:48,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:48,418 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:59:48,497 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:48,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971240631] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:59:48,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:59:48,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-06 22:59:48,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295591199] [2023-11-06 22:59:48,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:59:48,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:59:48,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:48,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:59:48,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:59:48,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 174 [2023-11-06 22:59:48,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 102 transitions, 1115 flow. Second operand has 15 states, 15 states have (on average 71.2) internal successors, (1068), 15 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:48,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:59:48,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 174 [2023-11-06 22:59:48,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:59:49,299 INFO L124 PetriNetUnfolderBase]: 396/722 cut-off events. [2023-11-06 22:59:49,299 INFO L125 PetriNetUnfolderBase]: For 4109/4109 co-relation queries the response was YES. [2023-11-06 22:59:49,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4269 conditions, 722 events. 396/722 cut-off events. For 4109/4109 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3365 event pairs, 28 based on Foata normal form. 10/732 useless extension candidates. Maximal degree in co-relation 4233. Up to 237 conditions per place. [2023-11-06 22:59:49,312 INFO L140 encePairwiseOnDemand]: 168/174 looper letters, 86 selfloop transitions, 120 changer transitions 1/207 dead transitions. [2023-11-06 22:59:49,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 207 transitions, 2442 flow [2023-11-06 22:59:49,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-06 22:59:49,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-06 22:59:49,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1690 transitions. [2023-11-06 22:59:49,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222888555722139 [2023-11-06 22:59:49,318 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1690 transitions. [2023-11-06 22:59:49,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1690 transitions. [2023-11-06 22:59:49,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:59:49,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1690 transitions. [2023-11-06 22:59:49,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 73.47826086956522) internal successors, (1690), 23 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:49,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 174.0) internal successors, (4176), 24 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:49,341 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 174.0) internal successors, (4176), 24 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:49,341 INFO L175 Difference]: Start difference. First operand has 97 places, 102 transitions, 1115 flow. Second operand 23 states and 1690 transitions. [2023-11-06 22:59:49,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 207 transitions, 2442 flow [2023-11-06 22:59:49,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 207 transitions, 2300 flow, removed 56 selfloop flow, removed 4 redundant places. [2023-11-06 22:59:49,388 INFO L231 Difference]: Finished difference. Result has 122 places, 165 transitions, 2122 flow [2023-11-06 22:59:49,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=1031, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2122, PETRI_PLACES=122, PETRI_TRANSITIONS=165} [2023-11-06 22:59:49,389 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 93 predicate places. [2023-11-06 22:59:49,389 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 165 transitions, 2122 flow [2023-11-06 22:59:49,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 71.2) internal successors, (1068), 15 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:49,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:59:49,391 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:49,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:59:49,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 22:59:49,599 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:59:49,599 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:49,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1856638916, now seen corresponding path program 7 times [2023-11-06 22:59:49,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:49,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498903663] [2023-11-06 22:59:49,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:49,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:49,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:49,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:49,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:49,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498903663] [2023-11-06 22:59:49,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498903663] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:59:49,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946854787] [2023-11-06 22:59:49,736 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:59:49,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:49,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:59:49,737 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:59:49,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:59:49,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:49,856 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:59:49,858 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:49,942 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:49,942 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:59:50,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:50,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946854787] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:59:50,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:59:50,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-06 22:59:50,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014147763] [2023-11-06 22:59:50,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:59:50,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:59:50,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:50,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:59:50,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:59:50,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 174 [2023-11-06 22:59:50,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 165 transitions, 2122 flow. Second operand has 15 states, 15 states have (on average 70.8) internal successors, (1062), 15 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:50,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:59:50,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 174 [2023-11-06 22:59:50,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:59:50,801 INFO L124 PetriNetUnfolderBase]: 438/790 cut-off events. [2023-11-06 22:59:50,802 INFO L125 PetriNetUnfolderBase]: For 7095/7095 co-relation queries the response was YES. [2023-11-06 22:59:50,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5315 conditions, 790 events. 438/790 cut-off events. For 7095/7095 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3707 event pairs, 97 based on Foata normal form. 34/824 useless extension candidates. Maximal degree in co-relation 5271. Up to 620 conditions per place. [2023-11-06 22:59:50,817 INFO L140 encePairwiseOnDemand]: 168/174 looper letters, 171 selfloop transitions, 54 changer transitions 0/225 dead transitions. [2023-11-06 22:59:50,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 225 transitions, 3167 flow [2023-11-06 22:59:50,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 22:59:50,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-06 22:59:50,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1332 transitions. [2023-11-06 22:59:50,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42528735632183906 [2023-11-06 22:59:50,822 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1332 transitions. [2023-11-06 22:59:50,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1332 transitions. [2023-11-06 22:59:50,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:59:50,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1332 transitions. [2023-11-06 22:59:50,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 74.0) internal successors, (1332), 18 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:50,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 174.0) internal successors, (3306), 19 states have internal predecessors, (3306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:50,846 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 174.0) internal successors, (3306), 19 states have internal predecessors, (3306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:50,856 INFO L175 Difference]: Start difference. First operand has 122 places, 165 transitions, 2122 flow. Second operand 18 states and 1332 transitions. [2023-11-06 22:59:50,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 225 transitions, 3167 flow [2023-11-06 22:59:50,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 225 transitions, 3009 flow, removed 54 selfloop flow, removed 8 redundant places. [2023-11-06 22:59:50,924 INFO L231 Difference]: Finished difference. Result has 143 places, 193 transitions, 2618 flow [2023-11-06 22:59:50,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=1964, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2618, PETRI_PLACES=143, PETRI_TRANSITIONS=193} [2023-11-06 22:59:50,925 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 114 predicate places. [2023-11-06 22:59:50,925 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 193 transitions, 2618 flow [2023-11-06 22:59:50,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 70.8) internal successors, (1062), 15 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:50,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:59:50,927 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:50,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:59:51,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:51,135 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:59:51,135 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:51,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1075372394, now seen corresponding path program 8 times [2023-11-06 22:59:51,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:51,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482242341] [2023-11-06 22:59:51,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:51,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:51,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:51,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:51,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:51,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482242341] [2023-11-06 22:59:51,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482242341] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:59:51,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899356182] [2023-11-06 22:59:51,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:59:51,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:51,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:59:51,262 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:59:51,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:59:51,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:59:51,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:59:51,376 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:59:51,377 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:51,491 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:51,492 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:59:51,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:51,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899356182] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:59:51,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:59:51,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-11-06 22:59:51,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989317503] [2023-11-06 22:59:51,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:59:51,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:59:51,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:51,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:59:51,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:59:51,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 174 [2023-11-06 22:59:51,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 193 transitions, 2618 flow. Second operand has 13 states, 13 states have (on average 71.0) internal successors, (923), 13 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:51,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:59:51,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 174 [2023-11-06 22:59:51,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:59:52,111 INFO L124 PetriNetUnfolderBase]: 443/793 cut-off events. [2023-11-06 22:59:52,111 INFO L125 PetriNetUnfolderBase]: For 9778/9778 co-relation queries the response was YES. [2023-11-06 22:59:52,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5703 conditions, 793 events. 443/793 cut-off events. For 9778/9778 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3686 event pairs, 100 based on Foata normal form. 6/799 useless extension candidates. Maximal degree in co-relation 5646. Up to 645 conditions per place. [2023-11-06 22:59:52,128 INFO L140 encePairwiseOnDemand]: 168/174 looper letters, 160 selfloop transitions, 50 changer transitions 3/213 dead transitions. [2023-11-06 22:59:52,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 213 transitions, 3282 flow [2023-11-06 22:59:52,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 22:59:52,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-06 22:59:52,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 810 transitions. [2023-11-06 22:59:52,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4231974921630094 [2023-11-06 22:59:52,132 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 810 transitions. [2023-11-06 22:59:52,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 810 transitions. [2023-11-06 22:59:52,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:59:52,133 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 810 transitions. [2023-11-06 22:59:52,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 73.63636363636364) internal successors, (810), 11 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:52,138 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 174.0) internal successors, (2088), 12 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:52,139 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 174.0) internal successors, (2088), 12 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:52,139 INFO L175 Difference]: Start difference. First operand has 143 places, 193 transitions, 2618 flow. Second operand 11 states and 810 transitions. [2023-11-06 22:59:52,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 213 transitions, 3282 flow [2023-11-06 22:59:52,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 213 transitions, 2906 flow, removed 172 selfloop flow, removed 5 redundant places. [2023-11-06 22:59:52,230 INFO L231 Difference]: Finished difference. Result has 149 places, 195 transitions, 2404 flow [2023-11-06 22:59:52,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=2248, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2404, PETRI_PLACES=149, PETRI_TRANSITIONS=195} [2023-11-06 22:59:52,231 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 120 predicate places. [2023-11-06 22:59:52,231 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 195 transitions, 2404 flow [2023-11-06 22:59:52,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 71.0) internal successors, (923), 13 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:52,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:59:52,232 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:52,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:59:52,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:52,439 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:59:52,440 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:52,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1052511674, now seen corresponding path program 9 times [2023-11-06 22:59:52,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:52,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993237874] [2023-11-06 22:59:52,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:52,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:52,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:52,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:59:52,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:52,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993237874] [2023-11-06 22:59:52,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993237874] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:59:52,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439967474] [2023-11-06 22:59:52,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:59:52,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:52,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:59:52,633 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:59:52,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:59:52,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 22:59:52,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:59:52,751 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:59:52,753 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:52,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:59:52,791 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:59:52,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:59:52,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439967474] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:59:52,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:59:52,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2023-11-06 22:59:52,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367146422] [2023-11-06 22:59:52,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:59:52,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:59:52,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:52,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:59:52,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:59:52,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 174 [2023-11-06 22:59:52,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 195 transitions, 2404 flow. Second operand has 5 states, 5 states have (on average 83.0) internal successors, (415), 5 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:52,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:59:52,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 174 [2023-11-06 22:59:52,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:59:53,345 INFO L124 PetriNetUnfolderBase]: 654/1167 cut-off events. [2023-11-06 22:59:53,345 INFO L125 PetriNetUnfolderBase]: For 13386/13398 co-relation queries the response was YES. [2023-11-06 22:59:53,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8144 conditions, 1167 events. 654/1167 cut-off events. For 13386/13398 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 6072 event pairs, 30 based on Foata normal form. 16/1181 useless extension candidates. Maximal degree in co-relation 8086. Up to 620 conditions per place. [2023-11-06 22:59:53,371 INFO L140 encePairwiseOnDemand]: 170/174 looper letters, 192 selfloop transitions, 81 changer transitions 47/327 dead transitions. [2023-11-06 22:59:53,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 327 transitions, 4587 flow [2023-11-06 22:59:53,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:59:53,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:59:53,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 446 transitions. [2023-11-06 22:59:53,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5126436781609195 [2023-11-06 22:59:53,374 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 446 transitions. [2023-11-06 22:59:53,375 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 446 transitions. [2023-11-06 22:59:53,375 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:59:53,375 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 446 transitions. [2023-11-06 22:59:53,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 89.2) internal successors, (446), 5 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:53,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 174.0) internal successors, (1044), 6 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) [2023-11-06 22:59:53,380 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 174.0) internal successors, (1044), 6 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) [2023-11-06 22:59:53,380 INFO L175 Difference]: Start difference. First operand has 149 places, 195 transitions, 2404 flow. Second operand 5 states and 446 transitions. [2023-11-06 22:59:53,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 327 transitions, 4587 flow [2023-11-06 22:59:53,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 327 transitions, 4492 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-11-06 22:59:53,502 INFO L231 Difference]: Finished difference. Result has 151 places, 241 transitions, 3220 flow [2023-11-06 22:59:53,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=2340, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3220, PETRI_PLACES=151, PETRI_TRANSITIONS=241} [2023-11-06 22:59:53,503 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 122 predicate places. [2023-11-06 22:59:53,504 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 241 transitions, 3220 flow [2023-11-06 22:59:53,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 83.0) internal successors, (415), 5 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:53,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:59:53,505 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:53,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:59:53,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:53,712 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:59:53,713 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:53,713 INFO L85 PathProgramCache]: Analyzing trace with hash 416245496, now seen corresponding path program 10 times [2023-11-06 22:59:53,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:53,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120380271] [2023-11-06 22:59:53,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:53,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:53,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:53,860 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:53,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:53,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120380271] [2023-11-06 22:59:53,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120380271] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:59:53,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891557983] [2023-11-06 22:59:53,861 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:59:53,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:53,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:59:53,862 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:59:53,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:59:53,965 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:59:53,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:59:53,966 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:59:53,968 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:54,048 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:54,049 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:59:54,131 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:54,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891557983] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:59:54,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:59:54,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-11-06 22:59:54,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024434231] [2023-11-06 22:59:54,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:59:54,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:59:54,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:54,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:59:54,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:59:54,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 174 [2023-11-06 22:59:54,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 241 transitions, 3220 flow. Second operand has 14 states, 14 states have (on average 70.85714285714286) internal successors, (992), 14 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:54,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:59:54,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 174 [2023-11-06 22:59:54,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:59:55,130 INFO L124 PetriNetUnfolderBase]: 775/1418 cut-off events. [2023-11-06 22:59:55,131 INFO L125 PetriNetUnfolderBase]: For 18483/18483 co-relation queries the response was YES. [2023-11-06 22:59:55,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10577 conditions, 1418 events. 775/1418 cut-off events. For 18483/18483 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 7867 event pairs, 35 based on Foata normal form. 10/1428 useless extension candidates. Maximal degree in co-relation 10516. Up to 564 conditions per place. [2023-11-06 22:59:55,163 INFO L140 encePairwiseOnDemand]: 168/174 looper letters, 214 selfloop transitions, 129 changer transitions 21/364 dead transitions. [2023-11-06 22:59:55,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 364 transitions, 5450 flow [2023-11-06 22:59:55,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:59:55,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-06 22:59:55,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 971 transitions. [2023-11-06 22:59:55,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292661361626879 [2023-11-06 22:59:55,168 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 971 transitions. [2023-11-06 22:59:55,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 971 transitions. [2023-11-06 22:59:55,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:59:55,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 971 transitions. [2023-11-06 22:59:55,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 74.6923076923077) internal successors, (971), 13 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:55,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 174.0) internal successors, (2436), 14 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:55,177 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 174.0) internal successors, (2436), 14 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:55,177 INFO L175 Difference]: Start difference. First operand has 151 places, 241 transitions, 3220 flow. Second operand 13 states and 971 transitions. [2023-11-06 22:59:55,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 364 transitions, 5450 flow [2023-11-06 22:59:55,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 364 transitions, 5344 flow, removed 53 selfloop flow, removed 0 redundant places. [2023-11-06 22:59:55,339 INFO L231 Difference]: Finished difference. Result has 171 places, 303 transitions, 4599 flow [2023-11-06 22:59:55,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=3134, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4599, PETRI_PLACES=171, PETRI_TRANSITIONS=303} [2023-11-06 22:59:55,340 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 142 predicate places. [2023-11-06 22:59:55,341 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 303 transitions, 4599 flow [2023-11-06 22:59:55,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 70.85714285714286) internal successors, (992), 14 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:55,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:59:55,342 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:55,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:59:55,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:55,548 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:59:55,549 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:55,549 INFO L85 PathProgramCache]: Analyzing trace with hash -683097644, now seen corresponding path program 11 times [2023-11-06 22:59:55,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:55,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488436767] [2023-11-06 22:59:55,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:55,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:55,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:55,768 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:55,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:55,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488436767] [2023-11-06 22:59:55,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488436767] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:59:55,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919021802] [2023-11-06 22:59:55,769 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:59:55,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:55,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:59:55,771 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:59:55,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:59:55,863 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 22:59:55,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:59:55,864 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:59:55,866 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:55,966 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:55,966 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:59:56,051 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:56,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919021802] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:59:56,052 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:59:56,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-11-06 22:59:56,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137822384] [2023-11-06 22:59:56,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:59:56,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:59:56,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:56,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:59:56,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:59:56,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 174 [2023-11-06 22:59:56,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 303 transitions, 4599 flow. Second operand has 16 states, 16 states have (on average 70.75) internal successors, (1132), 16 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:56,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:59:56,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 174 [2023-11-06 22:59:56,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:59:57,093 INFO L124 PetriNetUnfolderBase]: 841/1502 cut-off events. [2023-11-06 22:59:57,093 INFO L125 PetriNetUnfolderBase]: For 23251/23251 co-relation queries the response was YES. [2023-11-06 22:59:57,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12087 conditions, 1502 events. 841/1502 cut-off events. For 23251/23251 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 8170 event pairs, 75 based on Foata normal form. 16/1518 useless extension candidates. Maximal degree in co-relation 12017. Up to 557 conditions per place. [2023-11-06 22:59:57,132 INFO L140 encePairwiseOnDemand]: 168/174 looper letters, 223 selfloop transitions, 166 changer transitions 0/389 dead transitions. [2023-11-06 22:59:57,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 389 transitions, 6367 flow [2023-11-06 22:59:57,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 22:59:57,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-06 22:59:57,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1403 transitions. [2023-11-06 22:59:57,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4243799153055051 [2023-11-06 22:59:57,140 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1403 transitions. [2023-11-06 22:59:57,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1403 transitions. [2023-11-06 22:59:57,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:59:57,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1403 transitions. [2023-11-06 22:59:57,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 73.84210526315789) internal successors, (1403), 19 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:57,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 174.0) internal successors, (3480), 20 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:57,151 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 174.0) internal successors, (3480), 20 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:57,151 INFO L175 Difference]: Start difference. First operand has 171 places, 303 transitions, 4599 flow. Second operand 19 states and 1403 transitions. [2023-11-06 22:59:57,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 389 transitions, 6367 flow [2023-11-06 22:59:57,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 389 transitions, 6232 flow, removed 59 selfloop flow, removed 3 redundant places. [2023-11-06 22:59:57,360 INFO L231 Difference]: Finished difference. Result has 194 places, 342 transitions, 5647 flow [2023-11-06 22:59:57,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=4498, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=5647, PETRI_PLACES=194, PETRI_TRANSITIONS=342} [2023-11-06 22:59:57,362 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 165 predicate places. [2023-11-06 22:59:57,362 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 342 transitions, 5647 flow [2023-11-06 22:59:57,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 70.75) internal successors, (1132), 16 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:57,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:59:57,363 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:57,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:59:57,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:57,574 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:59:57,575 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:57,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1953556606, now seen corresponding path program 12 times [2023-11-06 22:59:57,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:57,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228871135] [2023-11-06 22:59:57,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:57,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:57,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:57,733 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:57,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:57,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228871135] [2023-11-06 22:59:57,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228871135] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:59:57,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435934311] [2023-11-06 22:59:57,734 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:59:57,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:57,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:59:57,737 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:59:57,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:59:57,867 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-06 22:59:57,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:59:57,868 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:59:57,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:57,966 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:57,966 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:59:58,034 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:58,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435934311] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:59:58,034 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:59:58,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-11-06 22:59:58,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736600137] [2023-11-06 22:59:58,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:59:58,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:59:58,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:59:58,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:59:58,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:59:58,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 174 [2023-11-06 22:59:58,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 342 transitions, 5647 flow. Second operand has 15 states, 15 states have (on average 70.8) internal successors, (1062), 15 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:58,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:59:58,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 174 [2023-11-06 22:59:58,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:59:59,286 INFO L124 PetriNetUnfolderBase]: 979/1708 cut-off events. [2023-11-06 22:59:59,286 INFO L125 PetriNetUnfolderBase]: For 30685/30685 co-relation queries the response was YES. [2023-11-06 22:59:59,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15109 conditions, 1708 events. 979/1708 cut-off events. For 30685/30685 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 9340 event pairs, 137 based on Foata normal form. 18/1726 useless extension candidates. Maximal degree in co-relation 15031. Up to 885 conditions per place. [2023-11-06 22:59:59,320 INFO L140 encePairwiseOnDemand]: 168/174 looper letters, 174 selfloop transitions, 257 changer transitions 7/438 dead transitions. [2023-11-06 22:59:59,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 438 transitions, 8208 flow [2023-11-06 22:59:59,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 22:59:59,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-06 22:59:59,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1398 transitions. [2023-11-06 22:59:59,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42286751361161523 [2023-11-06 22:59:59,326 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1398 transitions. [2023-11-06 22:59:59,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1398 transitions. [2023-11-06 22:59:59,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:59:59,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1398 transitions. [2023-11-06 22:59:59,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 73.57894736842105) internal successors, (1398), 19 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:59,337 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 174.0) internal successors, (3480), 20 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:59,338 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 174.0) internal successors, (3480), 20 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:59,339 INFO L175 Difference]: Start difference. First operand has 194 places, 342 transitions, 5647 flow. Second operand 19 states and 1398 transitions. [2023-11-06 22:59:59,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 438 transitions, 8208 flow [2023-11-06 22:59:59,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 438 transitions, 7955 flow, removed 102 selfloop flow, removed 5 redundant places. [2023-11-06 22:59:59,643 INFO L231 Difference]: Finished difference. Result has 213 places, 399 transitions, 7382 flow [2023-11-06 22:59:59,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=5446, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=7382, PETRI_PLACES=213, PETRI_TRANSITIONS=399} [2023-11-06 22:59:59,644 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 184 predicate places. [2023-11-06 22:59:59,644 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 399 transitions, 7382 flow [2023-11-06 22:59:59,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 70.8) internal successors, (1062), 15 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:59,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:59:59,645 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:59,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 22:59:59,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:59:59,852 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:59:59,852 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:59,852 INFO L85 PathProgramCache]: Analyzing trace with hash -789034972, now seen corresponding path program 13 times [2023-11-06 22:59:59,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:59:59,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091756176] [2023-11-06 22:59:59,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:59,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:59:59,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:59,998 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:59,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:59:59,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091756176] [2023-11-06 22:59:59,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091756176] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:59:59,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651366487] [2023-11-06 22:59:59,999 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:59:59,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:00:00,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:00:00,001 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:00:00,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 23:00:00,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:00,114 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:00:00,119 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:00:00,306 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:00,306 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:00:00,392 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:00,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651366487] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:00:00,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:00:00,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-11-06 23:00:00,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389680361] [2023-11-06 23:00:00,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:00:00,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 23:00:00,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:00:00,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 23:00:00,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-11-06 23:00:00,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 174 [2023-11-06 23:00:00,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 399 transitions, 7382 flow. Second operand has 15 states, 15 states have (on average 71.06666666666666) internal successors, (1066), 15 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:00,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:00:00,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 174 [2023-11-06 23:00:00,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:00:01,671 INFO L124 PetriNetUnfolderBase]: 1070/1885 cut-off events. [2023-11-06 23:00:01,671 INFO L125 PetriNetUnfolderBase]: For 41581/41581 co-relation queries the response was YES. [2023-11-06 23:00:01,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17622 conditions, 1885 events. 1070/1885 cut-off events. For 41581/41581 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 10553 event pairs, 67 based on Foata normal form. 36/1921 useless extension candidates. Maximal degree in co-relation 17537. Up to 513 conditions per place. [2023-11-06 23:00:01,774 INFO L140 encePairwiseOnDemand]: 168/174 looper letters, 216 selfloop transitions, 266 changer transitions 6/488 dead transitions. [2023-11-06 23:00:01,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 488 transitions, 9580 flow [2023-11-06 23:00:01,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-06 23:00:01,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-06 23:00:01,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1550 transitions. [2023-11-06 23:00:01,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42419266557197594 [2023-11-06 23:00:01,779 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1550 transitions. [2023-11-06 23:00:01,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1550 transitions. [2023-11-06 23:00:01,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:00:01,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1550 transitions. [2023-11-06 23:00:01,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 73.80952380952381) internal successors, (1550), 21 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:01,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 174.0) internal successors, (3828), 22 states have internal predecessors, (3828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:01,793 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 174.0) internal successors, (3828), 22 states have internal predecessors, (3828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:01,793 INFO L175 Difference]: Start difference. First operand has 213 places, 399 transitions, 7382 flow. Second operand 21 states and 1550 transitions. [2023-11-06 23:00:01,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 488 transitions, 9580 flow [2023-11-06 23:00:02,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 488 transitions, 8390 flow, removed 357 selfloop flow, removed 14 redundant places. [2023-11-06 23:00:02,202 INFO L231 Difference]: Finished difference. Result has 227 places, 437 transitions, 7803 flow [2023-11-06 23:00:02,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=6320, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=7803, PETRI_PLACES=227, PETRI_TRANSITIONS=437} [2023-11-06 23:00:02,203 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 198 predicate places. [2023-11-06 23:00:02,204 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 437 transitions, 7803 flow [2023-11-06 23:00:02,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 71.06666666666666) internal successors, (1066), 15 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:02,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:00:02,204 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:00:02,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 23:00:02,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:00:02,405 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 23:00:02,405 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:02,405 INFO L85 PathProgramCache]: Analyzing trace with hash -2105192276, now seen corresponding path program 14 times [2023-11-06 23:00:02,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:00:02,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287180585] [2023-11-06 23:00:02,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:02,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:00:02,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:02,549 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:02,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:00:02,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287180585] [2023-11-06 23:00:02,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287180585] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:00:02,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947871633] [2023-11-06 23:00:02,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:00:02,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:00:02,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:00:02,552 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:00:02,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 23:00:02,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:00:02,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:00:02,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:00:02,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:00:02,788 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:02,788 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:00:02,880 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:02,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947871633] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:00:02,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:00:02,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-11-06 23:00:02,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086259131] [2023-11-06 23:00:02,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:00:02,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 23:00:02,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:00:02,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 23:00:02,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2023-11-06 23:00:02,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 174 [2023-11-06 23:00:02,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 437 transitions, 7803 flow. Second operand has 15 states, 15 states have (on average 71.06666666666666) internal successors, (1066), 15 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:02,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:00:02,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 174 [2023-11-06 23:00:02,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:00:04,607 INFO L124 PetriNetUnfolderBase]: 1082/1949 cut-off events. [2023-11-06 23:00:04,608 INFO L125 PetriNetUnfolderBase]: For 46562/46562 co-relation queries the response was YES. [2023-11-06 23:00:04,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17515 conditions, 1949 events. 1082/1949 cut-off events. For 46562/46562 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 11342 event pairs, 76 based on Foata normal form. 38/1987 useless extension candidates. Maximal degree in co-relation 17429. Up to 706 conditions per place. [2023-11-06 23:00:04,642 INFO L140 encePairwiseOnDemand]: 168/174 looper letters, 143 selfloop transitions, 348 changer transitions 1/492 dead transitions. [2023-11-06 23:00:04,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 492 transitions, 9436 flow [2023-11-06 23:00:04,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 23:00:04,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-06 23:00:04,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1766 transitions. [2023-11-06 23:00:04,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4228927203065134 [2023-11-06 23:00:04,661 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1766 transitions. [2023-11-06 23:00:04,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1766 transitions. [2023-11-06 23:00:04,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:00:04,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1766 transitions. [2023-11-06 23:00:04,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 73.58333333333333) internal successors, (1766), 24 states have internal predecessors, (1766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:04,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 174.0) internal successors, (4350), 25 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:04,681 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 174.0) internal successors, (4350), 25 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:04,681 INFO L175 Difference]: Start difference. First operand has 227 places, 437 transitions, 7803 flow. Second operand 24 states and 1766 transitions. [2023-11-06 23:00:04,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 492 transitions, 9436 flow [2023-11-06 23:00:05,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 492 transitions, 9099 flow, removed 94 selfloop flow, removed 13 redundant places. [2023-11-06 23:00:05,062 INFO L231 Difference]: Finished difference. Result has 238 places, 450 transitions, 8572 flow [2023-11-06 23:00:05,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=7440, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=332, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=8572, PETRI_PLACES=238, PETRI_TRANSITIONS=450} [2023-11-06 23:00:05,064 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 209 predicate places. [2023-11-06 23:00:05,064 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 450 transitions, 8572 flow [2023-11-06 23:00:05,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 71.06666666666666) internal successors, (1066), 15 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:05,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:00:05,065 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:00:05,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 23:00:05,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-06 23:00:05,274 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 23:00:05,274 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:05,274 INFO L85 PathProgramCache]: Analyzing trace with hash 385459240, now seen corresponding path program 15 times [2023-11-06 23:00:05,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:00:05,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015559295] [2023-11-06 23:00:05,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:05,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:00:05,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:05,417 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:05,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:00:05,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015559295] [2023-11-06 23:00:05,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015559295] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:00:05,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914383112] [2023-11-06 23:00:05,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:00:05,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:00:05,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:00:05,419 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:00:05,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 23:00:05,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 23:00:05,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:00:05,532 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:00:05,533 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:00:05,654 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:05,654 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:00:05,809 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:05,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914383112] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:00:05,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:00:05,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-11-06 23:00:05,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988222780] [2023-11-06 23:00:05,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:00:05,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 23:00:05,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:00:05,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 23:00:05,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-11-06 23:00:05,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 174 [2023-11-06 23:00:05,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 450 transitions, 8572 flow. Second operand has 18 states, 18 states have (on average 70.94444444444444) internal successors, (1277), 18 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:05,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:00:05,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 174 [2023-11-06 23:00:05,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:00:07,767 INFO L124 PetriNetUnfolderBase]: 1335/2402 cut-off events. [2023-11-06 23:00:07,767 INFO L125 PetriNetUnfolderBase]: For 54334/54334 co-relation queries the response was YES. [2023-11-06 23:00:07,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22529 conditions, 2402 events. 1335/2402 cut-off events. For 54334/54334 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 14675 event pairs, 101 based on Foata normal form. 12/2414 useless extension candidates. Maximal degree in co-relation 22443. Up to 747 conditions per place. [2023-11-06 23:00:07,824 INFO L140 encePairwiseOnDemand]: 168/174 looper letters, 284 selfloop transitions, 329 changer transitions 0/613 dead transitions. [2023-11-06 23:00:07,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 613 transitions, 12479 flow [2023-11-06 23:00:07,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-06 23:00:07,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-06 23:00:07,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2131 transitions. [2023-11-06 23:00:07,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4223147047166072 [2023-11-06 23:00:07,831 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2131 transitions. [2023-11-06 23:00:07,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2131 transitions. [2023-11-06 23:00:07,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:00:07,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2131 transitions. [2023-11-06 23:00:07,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 73.48275862068965) internal successors, (2131), 29 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:07,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:07,857 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:07,857 INFO L175 Difference]: Start difference. First operand has 238 places, 450 transitions, 8572 flow. Second operand 29 states and 2131 transitions. [2023-11-06 23:00:07,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 613 transitions, 12479 flow [2023-11-06 23:00:08,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 613 transitions, 11679 flow, removed 75 selfloop flow, removed 21 redundant places. [2023-11-06 23:00:08,513 INFO L231 Difference]: Finished difference. Result has 250 places, 552 transitions, 10881 flow [2023-11-06 23:00:08,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=7960, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=10881, PETRI_PLACES=250, PETRI_TRANSITIONS=552} [2023-11-06 23:00:08,515 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 221 predicate places. [2023-11-06 23:00:08,515 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 552 transitions, 10881 flow [2023-11-06 23:00:08,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 70.94444444444444) internal successors, (1277), 18 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:08,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:00:08,517 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:00:08,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-06 23:00:08,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:00:08,720 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 23:00:08,720 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:08,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1345421846, now seen corresponding path program 16 times [2023-11-06 23:00:08,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:00:08,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578810380] [2023-11-06 23:00:08,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:08,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:00:08,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:08,869 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:08,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:00:08,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578810380] [2023-11-06 23:00:08,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578810380] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:00:08,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199654085] [2023-11-06 23:00:08,871 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:00:08,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:00:08,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:00:08,873 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:00:08,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 23:00:08,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:00:08,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:00:08,984 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:00:08,985 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:00:09,104 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:09,104 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:00:09,182 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:09,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199654085] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:00:09,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:00:09,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2023-11-06 23:00:09,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584422171] [2023-11-06 23:00:09,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:00:09,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 23:00:09,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:00:09,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 23:00:09,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-11-06 23:00:09,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 174 [2023-11-06 23:00:09,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 552 transitions, 10881 flow. Second operand has 15 states, 15 states have (on average 71.13333333333334) internal successors, (1067), 15 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:09,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:00:09,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 174 [2023-11-06 23:00:09,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:00:11,351 INFO L124 PetriNetUnfolderBase]: 1659/2972 cut-off events. [2023-11-06 23:00:11,351 INFO L125 PetriNetUnfolderBase]: For 69514/69514 co-relation queries the response was YES. [2023-11-06 23:00:11,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28397 conditions, 2972 events. 1659/2972 cut-off events. For 69514/69514 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 18892 event pairs, 68 based on Foata normal form. 34/3006 useless extension candidates. Maximal degree in co-relation 28307. Up to 785 conditions per place. [2023-11-06 23:00:11,398 INFO L140 encePairwiseOnDemand]: 168/174 looper letters, 180 selfloop transitions, 558 changer transitions 9/747 dead transitions. [2023-11-06 23:00:11,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 747 transitions, 15689 flow [2023-11-06 23:00:11,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-06 23:00:11,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-06 23:00:11,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1909 transitions. [2023-11-06 23:00:11,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219717064544651 [2023-11-06 23:00:11,402 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1909 transitions. [2023-11-06 23:00:11,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1909 transitions. [2023-11-06 23:00:11,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:00:11,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1909 transitions. [2023-11-06 23:00:11,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 73.42307692307692) internal successors, (1909), 26 states have internal predecessors, (1909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:11,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:11,415 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:11,415 INFO L175 Difference]: Start difference. First operand has 250 places, 552 transitions, 10881 flow. Second operand 26 states and 1909 transitions. [2023-11-06 23:00:11,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 747 transitions, 15689 flow [2023-11-06 23:00:12,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 747 transitions, 15348 flow, removed 142 selfloop flow, removed 5 redundant places. [2023-11-06 23:00:12,035 INFO L231 Difference]: Finished difference. Result has 280 places, 693 transitions, 15096 flow [2023-11-06 23:00:12,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=10590, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=427, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=15096, PETRI_PLACES=280, PETRI_TRANSITIONS=693} [2023-11-06 23:00:12,036 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 251 predicate places. [2023-11-06 23:00:12,036 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 693 transitions, 15096 flow [2023-11-06 23:00:12,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 71.13333333333334) internal successors, (1067), 15 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:12,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:00:12,037 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:00:12,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-06 23:00:12,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-06 23:00:12,243 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 23:00:12,243 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:12,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1729319148, now seen corresponding path program 17 times [2023-11-06 23:00:12,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:00:12,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103951614] [2023-11-06 23:00:12,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:12,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:00:12,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:12,369 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:12,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:00:12,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103951614] [2023-11-06 23:00:12,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103951614] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:00:12,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359064789] [2023-11-06 23:00:12,370 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 23:00:12,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:00:12,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:00:12,373 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:00:12,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-06 23:00:12,482 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 23:00:12,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:00:12,484 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:00:12,485 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:00:12,592 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:12,592 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:00:12,673 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:12,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359064789] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:00:12,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:00:12,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-11-06 23:00:12,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998271403] [2023-11-06 23:00:12,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:00:12,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 23:00:12,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:00:12,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 23:00:12,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2023-11-06 23:00:12,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 174 [2023-11-06 23:00:12,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 693 transitions, 15096 flow. Second operand has 20 states, 20 states have (on average 70.8) internal successors, (1416), 20 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:12,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:00:12,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 174 [2023-11-06 23:00:12,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:00:15,532 INFO L124 PetriNetUnfolderBase]: 2423/4340 cut-off events. [2023-11-06 23:00:15,532 INFO L125 PetriNetUnfolderBase]: For 118807/118807 co-relation queries the response was YES. [2023-11-06 23:00:15,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45560 conditions, 4340 events. 2423/4340 cut-off events. For 118807/118807 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 29630 event pairs, 143 based on Foata normal form. 32/4372 useless extension candidates. Maximal degree in co-relation 45459. Up to 1111 conditions per place. [2023-11-06 23:00:15,681 INFO L140 encePairwiseOnDemand]: 168/174 looper letters, 331 selfloop transitions, 753 changer transitions 10/1094 dead transitions. [2023-11-06 23:00:15,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 1094 transitions, 25685 flow [2023-11-06 23:00:15,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-06 23:00:15,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-06 23:00:15,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2641 transitions. [2023-11-06 23:00:15,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42161558109833974 [2023-11-06 23:00:15,687 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2641 transitions. [2023-11-06 23:00:15,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2641 transitions. [2023-11-06 23:00:15,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:00:15,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2641 transitions. [2023-11-06 23:00:15,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 73.36111111111111) internal successors, (2641), 36 states have internal predecessors, (2641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:15,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 174.0) internal successors, (6438), 37 states have internal predecessors, (6438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:15,703 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 174.0) internal successors, (6438), 37 states have internal predecessors, (6438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:15,703 INFO L175 Difference]: Start difference. First operand has 280 places, 693 transitions, 15096 flow. Second operand 36 states and 2641 transitions. [2023-11-06 23:00:15,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 1094 transitions, 25685 flow [2023-11-06 23:00:16,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 1094 transitions, 24693 flow, removed 371 selfloop flow, removed 10 redundant places. [2023-11-06 23:00:16,864 INFO L231 Difference]: Finished difference. Result has 317 places, 1021 transitions, 24547 flow [2023-11-06 23:00:16,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=14412, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=442, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=24547, PETRI_PLACES=317, PETRI_TRANSITIONS=1021} [2023-11-06 23:00:16,865 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 288 predicate places. [2023-11-06 23:00:16,866 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 1021 transitions, 24547 flow [2023-11-06 23:00:16,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 70.8) internal successors, (1416), 20 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:16,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:00:16,867 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:00:16,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-06 23:00:17,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-06 23:00:17,069 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 23:00:17,070 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:17,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1515971960, now seen corresponding path program 18 times [2023-11-06 23:00:17,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:00:17,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298373795] [2023-11-06 23:00:17,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:17,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:00:17,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:17,193 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:17,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:00:17,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298373795] [2023-11-06 23:00:17,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298373795] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:00:17,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081387316] [2023-11-06 23:00:17,194 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 23:00:17,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:00:17,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:00:17,197 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:00:17,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-06 23:00:17,370 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 23:00:17,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:00:17,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:00:17,374 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:00:17,460 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:17,461 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:00:17,535 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:17,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081387316] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:00:17,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:00:17,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-11-06 23:00:17,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847501049] [2023-11-06 23:00:17,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:00:17,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 23:00:17,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:00:17,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 23:00:17,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2023-11-06 23:00:17,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 174 [2023-11-06 23:00:17,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 1021 transitions, 24547 flow. Second operand has 20 states, 20 states have (on average 70.6) internal successors, (1412), 20 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:17,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:00:17,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 174 [2023-11-06 23:00:17,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:00:20,739 INFO L124 PetriNetUnfolderBase]: 2490/4449 cut-off events. [2023-11-06 23:00:20,740 INFO L125 PetriNetUnfolderBase]: For 146719/146719 co-relation queries the response was YES. [2023-11-06 23:00:20,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49864 conditions, 4449 events. 2490/4449 cut-off events. For 146719/146719 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 30259 event pairs, 691 based on Foata normal form. 60/4509 useless extension candidates. Maximal degree in co-relation 49751. Up to 3951 conditions per place. [2023-11-06 23:00:20,812 INFO L140 encePairwiseOnDemand]: 168/174 looper letters, 984 selfloop transitions, 141 changer transitions 11/1136 dead transitions. [2023-11-06 23:00:20,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 1136 transitions, 29035 flow [2023-11-06 23:00:20,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-06 23:00:20,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-06 23:00:20,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2212 transitions. [2023-11-06 23:00:20,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42375478927203064 [2023-11-06 23:00:20,820 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2212 transitions. [2023-11-06 23:00:20,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2212 transitions. [2023-11-06 23:00:20,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:00:20,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2212 transitions. [2023-11-06 23:00:20,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 73.73333333333333) internal successors, (2212), 30 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:20,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 174.0) internal successors, (5394), 31 states have internal predecessors, (5394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:20,835 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 174.0) internal successors, (5394), 31 states have internal predecessors, (5394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:20,835 INFO L175 Difference]: Start difference. First operand has 317 places, 1021 transitions, 24547 flow. Second operand 30 states and 2212 transitions. [2023-11-06 23:00:20,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 1136 transitions, 29035 flow [2023-11-06 23:00:22,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 1136 transitions, 28403 flow, removed 265 selfloop flow, removed 11 redundant places. [2023-11-06 23:00:22,546 INFO L231 Difference]: Finished difference. Result has 352 places, 1077 transitions, 26277 flow [2023-11-06 23:00:22,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=23929, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1021, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=926, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=26277, PETRI_PLACES=352, PETRI_TRANSITIONS=1077} [2023-11-06 23:00:22,548 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 323 predicate places. [2023-11-06 23:00:22,548 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 1077 transitions, 26277 flow [2023-11-06 23:00:22,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 70.6) internal successors, (1412), 20 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:22,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:00:22,549 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:00:22,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-06 23:00:22,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:00:22,760 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 23:00:22,760 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:22,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1162034790, now seen corresponding path program 19 times [2023-11-06 23:00:22,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:00:22,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173444786] [2023-11-06 23:00:22,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:22,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:00:22,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:22,877 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:22,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:00:22,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173444786] [2023-11-06 23:00:22,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173444786] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:00:22,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586584134] [2023-11-06 23:00:22,878 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 23:00:22,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:00:22,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:00:22,881 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:00:22,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-06 23:00:22,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:22,974 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:00:22,975 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:00:23,074 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:23,075 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:00:23,130 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:23,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586584134] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:00:23,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:00:23,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2023-11-06 23:00:23,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130465559] [2023-11-06 23:00:23,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:00:23,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 23:00:23,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:00:23,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 23:00:23,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-11-06 23:00:23,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 174 [2023-11-06 23:00:23,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 1077 transitions, 26277 flow. Second operand has 17 states, 17 states have (on average 70.82352941176471) internal successors, (1204), 17 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:23,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:00:23,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 174 [2023-11-06 23:00:23,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:00:26,351 INFO L124 PetriNetUnfolderBase]: 2496/4434 cut-off events. [2023-11-06 23:00:26,351 INFO L125 PetriNetUnfolderBase]: For 141290/141290 co-relation queries the response was YES. [2023-11-06 23:00:26,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49096 conditions, 4434 events. 2496/4434 cut-off events. For 141290/141290 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 29868 event pairs, 704 based on Foata normal form. 6/4440 useless extension candidates. Maximal degree in co-relation 48965. Up to 4069 conditions per place. [2023-11-06 23:00:26,447 INFO L140 encePairwiseOnDemand]: 168/174 looper letters, 975 selfloop transitions, 135 changer transitions 5/1115 dead transitions. [2023-11-06 23:00:26,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 1115 transitions, 29120 flow [2023-11-06 23:00:26,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 23:00:26,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-06 23:00:26,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1174 transitions. [2023-11-06 23:00:26,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42169540229885055 [2023-11-06 23:00:26,451 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1174 transitions. [2023-11-06 23:00:26,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1174 transitions. [2023-11-06 23:00:26,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:00:26,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1174 transitions. [2023-11-06 23:00:26,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 73.375) internal successors, (1174), 16 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:26,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 174.0) internal successors, (2958), 17 states have internal predecessors, (2958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:26,461 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 174.0) internal successors, (2958), 17 states have internal predecessors, (2958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:26,461 INFO L175 Difference]: Start difference. First operand has 352 places, 1077 transitions, 26277 flow. Second operand 16 states and 1174 transitions. [2023-11-06 23:00:26,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 1115 transitions, 29120 flow [2023-11-06 23:00:28,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 1115 transitions, 27545 flow, removed 764 selfloop flow, removed 6 redundant places. [2023-11-06 23:00:28,822 INFO L231 Difference]: Finished difference. Result has 361 places, 1090 transitions, 25409 flow [2023-11-06 23:00:28,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=24826, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1074, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=954, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=25409, PETRI_PLACES=361, PETRI_TRANSITIONS=1090} [2023-11-06 23:00:28,823 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 332 predicate places. [2023-11-06 23:00:28,823 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 1090 transitions, 25409 flow [2023-11-06 23:00:28,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 70.82352941176471) internal successors, (1204), 17 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:28,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:00:28,824 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:00:28,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-06 23:00:29,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:00:29,025 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 23:00:29,025 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:29,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1330279098, now seen corresponding path program 20 times [2023-11-06 23:00:29,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:00:29,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597802286] [2023-11-06 23:00:29,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:29,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:00:29,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:29,149 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:00:29,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:00:29,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597802286] [2023-11-06 23:00:29,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597802286] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:00:29,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625242904] [2023-11-06 23:00:29,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:00:29,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:00:29,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:00:29,152 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:00:29,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-06 23:00:29,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:00:29,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:00:29,263 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 23:00:29,269 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:00:29,297 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:00:29,297 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:00:29,332 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:00:29,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625242904] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:00:29,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:00:29,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2023-11-06 23:00:29,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035460958] [2023-11-06 23:00:29,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:00:29,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 23:00:29,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:00:29,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 23:00:29,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:00:29,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 174 [2023-11-06 23:00:29,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 1090 transitions, 25409 flow. Second operand has 6 states, 6 states have (on average 82.83333333333333) internal successors, (497), 6 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:29,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:00:29,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 174 [2023-11-06 23:00:29,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:00:34,167 INFO L124 PetriNetUnfolderBase]: 3355/5920 cut-off events. [2023-11-06 23:00:34,167 INFO L125 PetriNetUnfolderBase]: For 165433/165445 co-relation queries the response was YES. [2023-11-06 23:00:34,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62633 conditions, 5920 events. 3355/5920 cut-off events. For 165433/165445 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 42022 event pairs, 131 based on Foata normal form. 16/5933 useless extension candidates. Maximal degree in co-relation 62500. Up to 3546 conditions per place. [2023-11-06 23:00:34,320 INFO L140 encePairwiseOnDemand]: 170/174 looper letters, 994 selfloop transitions, 448 changer transitions 133/1583 dead transitions. [2023-11-06 23:00:34,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 1583 transitions, 39441 flow [2023-11-06 23:00:34,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 23:00:34,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 23:00:34,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 537 transitions. [2023-11-06 23:00:34,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.514367816091954 [2023-11-06 23:00:34,324 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 537 transitions. [2023-11-06 23:00:34,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 537 transitions. [2023-11-06 23:00:34,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:00:34,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 537 transitions. [2023-11-06 23:00:34,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 89.5) internal successors, (537), 6 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:34,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 174.0) internal successors, (1218), 7 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:34,329 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 174.0) internal successors, (1218), 7 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:34,329 INFO L175 Difference]: Start difference. First operand has 361 places, 1090 transitions, 25409 flow. Second operand 6 states and 537 transitions. [2023-11-06 23:00:34,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 1583 transitions, 39441 flow [2023-11-06 23:00:37,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 1583 transitions, 39117 flow, removed 70 selfloop flow, removed 9 redundant places. [2023-11-06 23:00:37,288 INFO L231 Difference]: Finished difference. Result has 360 places, 1320 transitions, 31259 flow [2023-11-06 23:00:37,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=25209, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1090, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=651, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=31259, PETRI_PLACES=360, PETRI_TRANSITIONS=1320} [2023-11-06 23:00:37,290 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 331 predicate places. [2023-11-06 23:00:37,290 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 1320 transitions, 31259 flow [2023-11-06 23:00:37,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 82.83333333333333) internal successors, (497), 6 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:37,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:00:37,291 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:00:37,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-06 23:00:37,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-11-06 23:00:37,498 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 23:00:37,498 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:37,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1485607960, now seen corresponding path program 21 times [2023-11-06 23:00:37,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:00:37,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947281638] [2023-11-06 23:00:37,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:37,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:00:37,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:37,736 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:37,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:00:37,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947281638] [2023-11-06 23:00:37,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947281638] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:00:37,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405938419] [2023-11-06 23:00:37,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:00:37,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:00:37,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:00:37,738 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:00:37,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-06 23:00:37,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-06 23:00:37,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:00:37,851 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 23:00:37,852 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:00:37,939 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:37,939 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:00:38,012 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:38,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405938419] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:00:38,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:00:38,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-11-06 23:00:38,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837410802] [2023-11-06 23:00:38,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:00:38,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 23:00:38,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:00:38,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 23:00:38,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-11-06 23:00:38,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 174 [2023-11-06 23:00:38,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 1320 transitions, 31259 flow. Second operand has 17 states, 17 states have (on average 70.70588235294117) internal successors, (1202), 17 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:38,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:00:38,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 174 [2023-11-06 23:00:38,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:00:43,159 INFO L124 PetriNetUnfolderBase]: 4014/7171 cut-off events. [2023-11-06 23:00:43,159 INFO L125 PetriNetUnfolderBase]: For 212145/212145 co-relation queries the response was YES. [2023-11-06 23:00:43,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80071 conditions, 7171 events. 4014/7171 cut-off events. For 212145/212145 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 52900 event pairs, 147 based on Foata normal form. 16/7187 useless extension candidates. Maximal degree in co-relation 79936. Up to 3288 conditions per place. [2023-11-06 23:00:43,310 INFO L140 encePairwiseOnDemand]: 168/174 looper letters, 1092 selfloop transitions, 639 changer transitions 33/1764 dead transitions. [2023-11-06 23:00:43,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 1764 transitions, 45645 flow [2023-11-06 23:00:43,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 23:00:43,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-06 23:00:43,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1193 transitions. [2023-11-06 23:00:43,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42852011494252873 [2023-11-06 23:00:43,315 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1193 transitions. [2023-11-06 23:00:43,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1193 transitions. [2023-11-06 23:00:43,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:00:43,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1193 transitions. [2023-11-06 23:00:43,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 74.5625) internal successors, (1193), 16 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:43,323 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 174.0) internal successors, (2958), 17 states have internal predecessors, (2958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:43,324 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 174.0) internal successors, (2958), 17 states have internal predecessors, (2958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:43,324 INFO L175 Difference]: Start difference. First operand has 360 places, 1320 transitions, 31259 flow. Second operand 16 states and 1193 transitions. [2023-11-06 23:00:43,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 1764 transitions, 45645 flow [2023-11-06 23:00:47,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 1764 transitions, 45167 flow, removed 239 selfloop flow, removed 0 redundant places. [2023-11-06 23:00:47,539 INFO L231 Difference]: Finished difference. Result has 385 places, 1631 transitions, 42045 flow [2023-11-06 23:00:47,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=30835, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=328, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=779, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=42045, PETRI_PLACES=385, PETRI_TRANSITIONS=1631} [2023-11-06 23:00:47,543 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 356 predicate places. [2023-11-06 23:00:47,543 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 1631 transitions, 42045 flow [2023-11-06 23:00:47,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 70.70588235294117) internal successors, (1202), 17 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:47,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:00:47,544 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:00:47,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-06 23:00:47,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-11-06 23:00:47,749 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 23:00:47,750 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:47,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1765708988, now seen corresponding path program 22 times [2023-11-06 23:00:47,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:00:47,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124520388] [2023-11-06 23:00:47,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:47,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:00:47,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:47,914 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:47,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:00:47,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124520388] [2023-11-06 23:00:47,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124520388] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:00:47,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27155838] [2023-11-06 23:00:47,915 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:00:47,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:00:47,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:00:47,917 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:00:47,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-06 23:00:48,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:00:48,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:00:48,035 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 23:00:48,037 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:00:48,156 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:48,156 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:00:48,261 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:48,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27155838] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:00:48,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:00:48,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2023-11-06 23:00:48,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520511177] [2023-11-06 23:00:48,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:00:48,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 23:00:48,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:00:48,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 23:00:48,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2023-11-06 23:00:48,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 174 [2023-11-06 23:00:48,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 1631 transitions, 42045 flow. Second operand has 19 states, 19 states have (on average 70.63157894736842) internal successors, (1342), 19 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:48,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:00:48,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 174 [2023-11-06 23:00:48,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:00:56,192 INFO L124 PetriNetUnfolderBase]: 4415/7816 cut-off events. [2023-11-06 23:00:56,192 INFO L125 PetriNetUnfolderBase]: For 262601/262601 co-relation queries the response was YES. [2023-11-06 23:00:56,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91437 conditions, 7816 events. 4415/7816 cut-off events. For 262601/262601 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 57850 event pairs, 440 based on Foata normal form. 22/7838 useless extension candidates. Maximal degree in co-relation 91291. Up to 3120 conditions per place. [2023-11-06 23:00:56,337 INFO L140 encePairwiseOnDemand]: 168/174 looper letters, 1083 selfloop transitions, 827 changer transitions 2/1912 dead transitions. [2023-11-06 23:00:56,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 1912 transitions, 52266 flow [2023-11-06 23:00:56,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 23:00:56,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-06 23:00:56,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1771 transitions. [2023-11-06 23:00:56,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42409003831417624 [2023-11-06 23:00:56,341 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1771 transitions. [2023-11-06 23:00:56,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1771 transitions. [2023-11-06 23:00:56,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:00:56,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1771 transitions. [2023-11-06 23:00:56,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 73.79166666666667) internal successors, (1771), 24 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:56,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 174.0) internal successors, (4350), 25 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:56,352 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 174.0) internal successors, (4350), 25 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:00:56,352 INFO L175 Difference]: Start difference. First operand has 385 places, 1631 transitions, 42045 flow. Second operand 24 states and 1771 transitions. [2023-11-06 23:00:56,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 1912 transitions, 52266 flow [2023-11-06 23:01:01,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 1912 transitions, 51879 flow, removed 172 selfloop flow, removed 4 redundant places. [2023-11-06 23:01:01,652 INFO L231 Difference]: Finished difference. Result has 412 places, 1802 transitions, 49005 flow [2023-11-06 23:01:01,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=41722, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=673, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=879, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=49005, PETRI_PLACES=412, PETRI_TRANSITIONS=1802} [2023-11-06 23:01:01,654 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 383 predicate places. [2023-11-06 23:01:01,654 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 1802 transitions, 49005 flow [2023-11-06 23:01:01,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 70.63157894736842) internal successors, (1342), 19 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:01,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:01:01,654 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:01:01,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-06 23:01:01,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-11-06 23:01:01,855 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)] === [2023-11-06 23:01:01,855 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:01,855 INFO L85 PathProgramCache]: Analyzing trace with hash 2129542626, now seen corresponding path program 23 times [2023-11-06 23:01:01,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:01:01,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162160647] [2023-11-06 23:01:01,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:01,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:01:01,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:02,005 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:01:02,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:01:02,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162160647] [2023-11-06 23:01:02,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162160647] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:01:02,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243836702] [2023-11-06 23:01:02,006 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 23:01:02,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:01:02,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:01:02,009 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:01:02,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-06 23:01:02,129 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-11-06 23:01:02,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:01:02,131 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 23:01:02,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:01:02,249 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:01:02,249 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:01:02,330 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:01:02,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243836702] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:01:02,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:01:02,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2023-11-06 23:01:02,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808854904] [2023-11-06 23:01:02,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:01:02,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 23:01:02,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:01:02,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 23:01:02,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2023-11-06 23:01:02,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 174 [2023-11-06 23:01:02,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 1802 transitions, 49005 flow. Second operand has 18 states, 18 states have (on average 70.66666666666667) internal successors, (1272), 18 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:02,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:01:02,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 174 [2023-11-06 23:01:02,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:01:10,936 INFO L124 PetriNetUnfolderBase]: 4651/8160 cut-off events. [2023-11-06 23:01:10,936 INFO L125 PetriNetUnfolderBase]: For 318150/318150 co-relation queries the response was YES. [2023-11-06 23:01:11,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100107 conditions, 8160 events. 4651/8160 cut-off events. For 318150/318150 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 60586 event pairs, 726 based on Foata normal form. 22/8182 useless extension candidates. Maximal degree in co-relation 99953. Up to 4670 conditions per place. [2023-11-06 23:01:11,109 INFO L140 encePairwiseOnDemand]: 168/174 looper letters, 716 selfloop transitions, 1278 changer transitions 33/2027 dead transitions. [2023-11-06 23:01:11,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 2027 transitions, 58745 flow [2023-11-06 23:01:11,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-06 23:01:11,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-06 23:01:11,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2126 transitions. [2023-11-06 23:01:11,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4213238208481966 [2023-11-06 23:01:11,115 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2126 transitions. [2023-11-06 23:01:11,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2126 transitions. [2023-11-06 23:01:11,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:01:11,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2126 transitions. [2023-11-06 23:01:11,120 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 73.3103448275862) internal successors, (2126), 29 states have internal predecessors, (2126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:11,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:11,127 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:11,127 INFO L175 Difference]: Start difference. First operand has 412 places, 1802 transitions, 49005 flow. Second operand 29 states and 2126 transitions. [2023-11-06 23:01:11,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 2027 transitions, 58745 flow [2023-11-06 23:01:15,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 2027 transitions, 57972 flow, removed 350 selfloop flow, removed 5 redundant places. [2023-11-06 23:01:16,004 INFO L231 Difference]: Finished difference. Result has 438 places, 1940 transitions, 55069 flow [2023-11-06 23:01:16,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=48298, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1802, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=648, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=55069, PETRI_PLACES=438, PETRI_TRANSITIONS=1940} [2023-11-06 23:01:16,006 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 409 predicate places. [2023-11-06 23:01:16,006 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 1940 transitions, 55069 flow [2023-11-06 23:01:16,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 70.66666666666667) internal successors, (1272), 18 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:16,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:01:16,007 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:01:16,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-06 23:01:16,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-11-06 23:01:16,219 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)] === [2023-11-06 23:01:16,219 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:16,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1723008046, now seen corresponding path program 24 times [2023-11-06 23:01:16,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:01:16,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767044818] [2023-11-06 23:01:16,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:16,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:01:16,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:16,359 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:01:16,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:01:16,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767044818] [2023-11-06 23:01:16,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767044818] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:01:16,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557787114] [2023-11-06 23:01:16,360 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 23:01:16,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:01:16,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:01:16,361 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:01:16,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-06 23:01:16,482 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-06 23:01:16,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:01:16,483 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 23:01:16,484 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:01:16,597 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:01:16,597 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:01:16,690 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:01:16,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557787114] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:01:16,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:01:16,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2023-11-06 23:01:16,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62887519] [2023-11-06 23:01:16,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:01:16,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 23:01:16,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:01:16,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 23:01:16,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2023-11-06 23:01:16,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 174 [2023-11-06 23:01:16,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 1940 transitions, 55069 flow. Second operand has 18 states, 18 states have (on average 70.66666666666667) internal successors, (1272), 18 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:16,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:01:16,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 174 [2023-11-06 23:01:16,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:01:26,637 INFO L124 PetriNetUnfolderBase]: 5015/8772 cut-off events. [2023-11-06 23:01:26,637 INFO L125 PetriNetUnfolderBase]: For 336633/336633 co-relation queries the response was YES. [2023-11-06 23:01:26,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109895 conditions, 8772 events. 5015/8772 cut-off events. For 336633/336633 co-relation queries the response was YES. Maximal size of possible extension queue 637. Compared 65049 event pairs, 224 based on Foata normal form. 68/8840 useless extension candidates. Maximal degree in co-relation 109737. Up to 2443 conditions per place. [2023-11-06 23:01:26,822 INFO L140 encePairwiseOnDemand]: 168/174 looper letters, 698 selfloop transitions, 1489 changer transitions 14/2201 dead transitions. [2023-11-06 23:01:26,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 2201 transitions, 65282 flow [2023-11-06 23:01:26,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-06 23:01:26,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-06 23:01:26,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2574 transitions. [2023-11-06 23:01:26,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42266009852216746 [2023-11-06 23:01:26,826 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2574 transitions. [2023-11-06 23:01:26,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2574 transitions. [2023-11-06 23:01:26,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:01:26,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2574 transitions. [2023-11-06 23:01:26,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 73.54285714285714) internal successors, (2574), 35 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:26,838 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 174.0) internal successors, (6264), 36 states have internal predecessors, (6264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:26,840 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 174.0) internal successors, (6264), 36 states have internal predecessors, (6264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:26,840 INFO L175 Difference]: Start difference. First operand has 438 places, 1940 transitions, 55069 flow. Second operand 35 states and 2574 transitions. [2023-11-06 23:01:26,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 2201 transitions, 65282 flow [2023-11-06 23:01:33,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 2201 transitions, 60624 flow, removed 1250 selfloop flow, removed 18 redundant places. [2023-11-06 23:01:33,570 INFO L231 Difference]: Finished difference. Result has 465 places, 2104 transitions, 60110 flow [2023-11-06 23:01:33,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=50972, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1936, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1330, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=60110, PETRI_PLACES=465, PETRI_TRANSITIONS=2104} [2023-11-06 23:01:33,573 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 436 predicate places. [2023-11-06 23:01:33,573 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 2104 transitions, 60110 flow [2023-11-06 23:01:33,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 70.66666666666667) internal successors, (1272), 18 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:33,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:01:33,574 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:01:33,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-06 23:01:33,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-11-06 23:01:33,780 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)] === [2023-11-06 23:01:33,780 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:33,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1464861748, now seen corresponding path program 25 times [2023-11-06 23:01:33,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:01:33,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395140782] [2023-11-06 23:01:33,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:33,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:01:33,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:33,923 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:01:33,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:01:33,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395140782] [2023-11-06 23:01:33,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395140782] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:01:33,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086523702] [2023-11-06 23:01:33,924 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 23:01:33,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:01:33,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:01:33,929 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:01:33,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-06 23:01:34,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:34,030 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 23:01:34,031 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:01:34,144 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:01:34,144 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:01:34,241 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:01:34,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086523702] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:01:34,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:01:34,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2023-11-06 23:01:34,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609884275] [2023-11-06 23:01:34,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:01:34,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 23:01:34,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:01:34,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 23:01:34,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-11-06 23:01:34,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 174 [2023-11-06 23:01:34,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 2104 transitions, 60110 flow. Second operand has 18 states, 18 states have (on average 70.88888888888889) internal successors, (1276), 18 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:34,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:01:34,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 174 [2023-11-06 23:01:34,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:01:45,395 INFO L124 PetriNetUnfolderBase]: 5301/9308 cut-off events. [2023-11-06 23:01:45,395 INFO L125 PetriNetUnfolderBase]: For 337591/337591 co-relation queries the response was YES. [2023-11-06 23:01:45,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115497 conditions, 9308 events. 5301/9308 cut-off events. For 337591/337591 co-relation queries the response was YES. Maximal size of possible extension queue 662. Compared 70126 event pairs, 355 based on Foata normal form. 22/9330 useless extension candidates. Maximal degree in co-relation 115335. Up to 2791 conditions per place. [2023-11-06 23:01:45,622 INFO L140 encePairwiseOnDemand]: 168/174 looper letters, 1084 selfloop transitions, 1230 changer transitions 23/2337 dead transitions. [2023-11-06 23:01:45,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 2337 transitions, 70008 flow [2023-11-06 23:01:45,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-06 23:01:45,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-06 23:01:45,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2206 transitions. [2023-11-06 23:01:45,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42260536398467435 [2023-11-06 23:01:45,626 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2206 transitions. [2023-11-06 23:01:45,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2206 transitions. [2023-11-06 23:01:45,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:01:45,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2206 transitions. [2023-11-06 23:01:45,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 73.53333333333333) internal successors, (2206), 30 states have internal predecessors, (2206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:45,636 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 174.0) internal successors, (5394), 31 states have internal predecessors, (5394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:45,637 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 174.0) internal successors, (5394), 31 states have internal predecessors, (5394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:45,638 INFO L175 Difference]: Start difference. First operand has 465 places, 2104 transitions, 60110 flow. Second operand 30 states and 2206 transitions. [2023-11-06 23:01:45,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 2337 transitions, 70008 flow [2023-11-06 23:01:53,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 2337 transitions, 68542 flow, removed 476 selfloop flow, removed 18 redundant places. [2023-11-06 23:01:53,485 INFO L231 Difference]: Finished difference. Result has 484 places, 2213 transitions, 65680 flow [2023-11-06 23:01:53,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=58810, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=910, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=65680, PETRI_PLACES=484, PETRI_TRANSITIONS=2213} [2023-11-06 23:01:53,488 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 455 predicate places. [2023-11-06 23:01:53,488 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 2213 transitions, 65680 flow [2023-11-06 23:01:53,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 70.88888888888889) internal successors, (1276), 18 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:53,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:01:53,488 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:01:53,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-11-06 23:01:53,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-11-06 23:01:53,689 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)] === [2023-11-06 23:01:53,689 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:53,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1255801946, now seen corresponding path program 26 times [2023-11-06 23:01:53,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:01:53,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159804370] [2023-11-06 23:01:53,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:53,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:01:53,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:53,871 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:01:53,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:01:53,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159804370] [2023-11-06 23:01:53,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159804370] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:01:53,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354017519] [2023-11-06 23:01:53,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:01:53,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:01:53,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:01:53,874 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:01:53,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-06 23:01:53,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:01:53,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:01:53,993 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 23:01:53,995 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:01:54,097 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:01:54,098 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:01:54,167 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:01:54,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354017519] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:01:54,167 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:01:54,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2023-11-06 23:01:54,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419816052] [2023-11-06 23:01:54,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:01:54,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 23:01:54,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:01:54,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 23:01:54,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2023-11-06 23:01:54,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 174 [2023-11-06 23:01:54,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 2213 transitions, 65680 flow. Second operand has 18 states, 18 states have (on average 70.66666666666667) internal successors, (1272), 18 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:01:54,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:01:54,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 174 [2023-11-06 23:01:54,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:06,059 INFO L124 PetriNetUnfolderBase]: 5366/9491 cut-off events. [2023-11-06 23:02:06,059 INFO L125 PetriNetUnfolderBase]: For 383606/383606 co-relation queries the response was YES. [2023-11-06 23:02:06,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119617 conditions, 9491 events. 5366/9491 cut-off events. For 383606/383606 co-relation queries the response was YES. Maximal size of possible extension queue 680. Compared 72494 event pairs, 331 based on Foata normal form. 52/9543 useless extension candidates. Maximal degree in co-relation 119449. Up to 3513 conditions per place. [2023-11-06 23:02:06,355 INFO L140 encePairwiseOnDemand]: 168/174 looper letters, 467 selfloop transitions, 1858 changer transitions 1/2326 dead transitions. [2023-11-06 23:02:06,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 2326 transitions, 72041 flow [2023-11-06 23:02:06,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-06 23:02:06,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-06 23:02:06,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2714 transitions. [2023-11-06 23:02:06,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42155949052500774 [2023-11-06 23:02:06,360 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2714 transitions. [2023-11-06 23:02:06,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2714 transitions. [2023-11-06 23:02:06,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:06,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2714 transitions. [2023-11-06 23:02:06,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 73.35135135135135) internal successors, (2714), 37 states have internal predecessors, (2714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:06,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 174.0) internal successors, (6612), 38 states have internal predecessors, (6612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:06,374 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 174.0) internal successors, (6612), 38 states have internal predecessors, (6612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:06,374 INFO L175 Difference]: Start difference. First operand has 484 places, 2213 transitions, 65680 flow. Second operand 37 states and 2714 transitions. [2023-11-06 23:02:06,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 2326 transitions, 72041 flow [2023-11-06 23:02:14,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 2326 transitions, 71241 flow, removed 295 selfloop flow, removed 11 redundant places. [2023-11-06 23:02:15,022 INFO L231 Difference]: Finished difference. Result has 510 places, 2258 transitions, 70637 flow [2023-11-06 23:02:15,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=64829, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1810, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=70637, PETRI_PLACES=510, PETRI_TRANSITIONS=2258} [2023-11-06 23:02:15,024 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 481 predicate places. [2023-11-06 23:02:15,024 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 2258 transitions, 70637 flow [2023-11-06 23:02:15,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 70.66666666666667) internal successors, (1272), 18 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:15,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:15,025 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:02:15,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-11-06 23:02:15,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-11-06 23:02:15,225 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 23:02:15,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:15,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1146382296, now seen corresponding path program 27 times [2023-11-06 23:02:15,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:15,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007579309] [2023-11-06 23:02:15,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:15,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:15,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:15,373 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:15,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:15,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007579309] [2023-11-06 23:02:15,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007579309] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:02:15,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902814727] [2023-11-06 23:02:15,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:02:15,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:02:15,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:02:15,377 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:02:15,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-06 23:02:15,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 23:02:15,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:02:15,492 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 23:02:15,493 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:02:15,627 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:15,627 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:02:15,712 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:15,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902814727] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:02:15,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:02:15,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 18 [2023-11-06 23:02:15,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255409546] [2023-11-06 23:02:15,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:02:15,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 23:02:15,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:15,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 23:02:15,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-11-06 23:02:15,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 174 [2023-11-06 23:02:15,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 2258 transitions, 70637 flow. Second operand has 18 states, 18 states have (on average 70.94444444444444) internal successors, (1277), 18 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:15,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:15,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 174 [2023-11-06 23:02:15,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:29,373 INFO L124 PetriNetUnfolderBase]: 6007/10640 cut-off events. [2023-11-06 23:02:29,373 INFO L125 PetriNetUnfolderBase]: For 425500/425500 co-relation queries the response was YES. [2023-11-06 23:02:29,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140046 conditions, 10640 events. 6007/10640 cut-off events. For 425500/425500 co-relation queries the response was YES. Maximal size of possible extension queue 763. Compared 82832 event pairs, 296 based on Foata normal form. 28/10668 useless extension candidates. Maximal degree in co-relation 139877. Up to 2604 conditions per place. [2023-11-06 23:02:29,801 INFO L140 encePairwiseOnDemand]: 168/174 looper letters, 924 selfloop transitions, 1695 changer transitions 16/2635 dead transitions. [2023-11-06 23:02:29,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 543 places, 2635 transitions, 86178 flow [2023-11-06 23:02:29,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-06 23:02:29,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-06 23:02:29,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2497 transitions. [2023-11-06 23:02:29,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42207572684246114 [2023-11-06 23:02:29,805 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2497 transitions. [2023-11-06 23:02:29,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2497 transitions. [2023-11-06 23:02:29,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:29,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2497 transitions. [2023-11-06 23:02:29,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 73.44117647058823) internal successors, (2497), 34 states have internal predecessors, (2497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:29,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 174.0) internal successors, (6090), 35 states have internal predecessors, (6090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:29,816 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 174.0) internal successors, (6090), 35 states have internal predecessors, (6090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:29,816 INFO L175 Difference]: Start difference. First operand has 510 places, 2258 transitions, 70637 flow. Second operand 34 states and 2497 transitions. [2023-11-06 23:02:29,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 543 places, 2635 transitions, 86178 flow [2023-11-06 23:02:41,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 514 places, 2635 transitions, 83233 flow, removed 133 selfloop flow, removed 29 redundant places. [2023-11-06 23:02:41,757 INFO L231 Difference]: Finished difference. Result has 523 places, 2512 transitions, 81066 flow [2023-11-06 23:02:41,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=68050, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1468, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=735, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=81066, PETRI_PLACES=523, PETRI_TRANSITIONS=2512} [2023-11-06 23:02:41,760 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 494 predicate places. [2023-11-06 23:02:41,760 INFO L495 AbstractCegarLoop]: Abstraction has has 523 places, 2512 transitions, 81066 flow [2023-11-06 23:02:41,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 70.94444444444444) internal successors, (1277), 18 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:41,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:02:41,761 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:02:41,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-11-06 23:02:41,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-06 23:02:41,962 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 23:02:41,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:41,962 INFO L85 PathProgramCache]: Analyzing trace with hash 844385814, now seen corresponding path program 28 times [2023-11-06 23:02:41,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:41,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110993108] [2023-11-06 23:02:41,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:41,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:41,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:42,124 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:42,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:42,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110993108] [2023-11-06 23:02:42,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110993108] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:02:42,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169131529] [2023-11-06 23:02:42,125 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:02:42,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:02:42,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:02:42,129 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:02:42,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-06 23:02:42,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:02:42,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:02:42,229 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 23:02:42,230 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:02:42,334 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:42,334 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:02:42,454 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:42,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169131529] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:02:42,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:02:42,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2023-11-06 23:02:42,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222228434] [2023-11-06 23:02:42,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:02:42,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 23:02:42,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:42,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 23:02:42,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2023-11-06 23:02:42,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 174 [2023-11-06 23:02:42,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 523 places, 2512 transitions, 81066 flow. Second operand has 21 states, 21 states have (on average 70.80952380952381) internal successors, (1487), 21 states have internal predecessors, (1487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:42,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:02:42,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 174 [2023-11-06 23:02:42,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:02:59,093 INFO L124 PetriNetUnfolderBase]: 6429/11412 cut-off events. [2023-11-06 23:02:59,093 INFO L125 PetriNetUnfolderBase]: For 495299/495299 co-relation queries the response was YES. [2023-11-06 23:02:59,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155302 conditions, 11412 events. 6429/11412 cut-off events. For 495299/495299 co-relation queries the response was YES. Maximal size of possible extension queue 798. Compared 90395 event pairs, 533 based on Foata normal form. 10/11422 useless extension candidates. Maximal degree in co-relation 155125. Up to 3883 conditions per place. [2023-11-06 23:02:59,560 INFO L140 encePairwiseOnDemand]: 168/174 looper letters, 1410 selfloop transitions, 1413 changer transitions 0/2823 dead transitions. [2023-11-06 23:02:59,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 564 places, 2823 transitions, 95113 flow [2023-11-06 23:02:59,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-06 23:02:59,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-11-06 23:02:59,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 3081 transitions. [2023-11-06 23:02:59,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4215927750410509 [2023-11-06 23:02:59,566 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 3081 transitions. [2023-11-06 23:02:59,566 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 3081 transitions. [2023-11-06 23:02:59,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:02:59,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 3081 transitions. [2023-11-06 23:02:59,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 73.35714285714286) internal successors, (3081), 42 states have internal predecessors, (3081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:59,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 174.0) internal successors, (7482), 43 states have internal predecessors, (7482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:59,581 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 174.0) internal successors, (7482), 43 states have internal predecessors, (7482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:02:59,581 INFO L175 Difference]: Start difference. First operand has 523 places, 2512 transitions, 81066 flow. Second operand 42 states and 3081 transitions. [2023-11-06 23:02:59,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 564 places, 2823 transitions, 95113 flow [2023-11-06 23:03:14,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 555 places, 2823 transitions, 94118 flow, removed 408 selfloop flow, removed 9 redundant places. [2023-11-06 23:03:15,081 INFO L231 Difference]: Finished difference. Result has 559 places, 2688 transitions, 90119 flow [2023-11-06 23:03:15,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=80131, PETRI_DIFFERENCE_MINUEND_PLACES=514, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=90119, PETRI_PLACES=559, PETRI_TRANSITIONS=2688} [2023-11-06 23:03:15,084 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 530 predicate places. [2023-11-06 23:03:15,084 INFO L495 AbstractCegarLoop]: Abstraction has has 559 places, 2688 transitions, 90119 flow [2023-11-06 23:03:15,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 70.80952380952381) internal successors, (1487), 21 states have internal predecessors, (1487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:15,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:03:15,085 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:15,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:15,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-06 23:03:15,285 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 23:03:15,285 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:15,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1104369880, now seen corresponding path program 29 times [2023-11-06 23:03:15,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:15,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171296744] [2023-11-06 23:03:15,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:15,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:15,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:15,432 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:03:15,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:15,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171296744] [2023-11-06 23:03:15,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171296744] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:15,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833897] [2023-11-06 23:03:15,433 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 23:03:15,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:15,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:15,435 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:15,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6fbe92f-8abd-44df-8111-d40a69191aea/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-06 23:03:15,536 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-06 23:03:15,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:03:15,537 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 23:03:15,538 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:15,653 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:03:15,653 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:15,734 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:03:15,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833897] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:03:15,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:03:15,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2023-11-06 23:03:15,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425426510] [2023-11-06 23:03:15,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:15,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 23:03:15,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:15,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 23:03:15,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2023-11-06 23:03:15,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 174 [2023-11-06 23:03:15,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 559 places, 2688 transitions, 90119 flow. Second operand has 18 states, 18 states have (on average 70.94444444444444) internal successors, (1277), 18 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:03:15,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:03:15,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 174 [2023-11-06 23:03:15,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand