./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/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_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/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_d41caf32-913a-45ad-91c6-131c285d0b77/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 dfec19cb420bdcc992ee0af7789c6701a360457d4b79eebd70c54f4e314fbf3f --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 21:53:29,020 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:53:29,138 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-06 21:53:29,147 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:53:29,147 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:53:29,192 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:53:29,193 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:53:29,193 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:53:29,194 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:53:29,195 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:53:29,196 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 21:53:29,196 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 21:53:29,197 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 21:53:29,198 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:53:29,198 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 21:53:29,199 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:53:29,199 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 21:53:29,200 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:53:29,200 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 21:53:29,201 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 21:53:29,201 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 21:53:29,202 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:53:29,202 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 21:53:29,203 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 21:53:29,203 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 21:53:29,204 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:53:29,204 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:53:29,205 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 21:53:29,205 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:53:29,205 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:53:29,206 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:53:29,206 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:53:29,207 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 21:53:29,207 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 21:53:29,207 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 21:53:29,208 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 21:53:29,208 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:53:29,208 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 21:53:29,208 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_d41caf32-913a-45ad-91c6-131c285d0b77/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dfec19cb420bdcc992ee0af7789c6701a360457d4b79eebd70c54f4e314fbf3f [2023-11-06 21:53:29,466 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:53:29,502 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:53:29,505 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:53:29,507 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:53:29,508 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:53:29,509 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2023-11-06 21:53:32,797 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:53:33,143 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:53:33,144 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2023-11-06 21:53:33,155 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/data/7e7dd8847/c254dfcb0997400fbbbfde6a707584d8/FLAG5beb1a527 [2023-11-06 21:53:33,177 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/data/7e7dd8847/c254dfcb0997400fbbbfde6a707584d8 [2023-11-06 21:53:33,187 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:53:33,193 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:53:33,195 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:53:33,196 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:53:33,201 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:53:33,202 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:53:33" (1/1) ... [2023-11-06 21:53:33,204 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20aea69f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:33, skipping insertion in model container [2023-11-06 21:53:33,204 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:53:33" (1/1) ... [2023-11-06 21:53:33,233 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:53:33,517 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:53:33,532 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:53:33,553 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:53:33,562 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 21:53:33,563 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 21:53:33,571 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:53:33,572 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:33 WrapperNode [2023-11-06 21:53:33,572 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:53:33,574 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:53:33,574 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:53:33,574 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:53:33,583 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:33" (1/1) ... [2023-11-06 21:53:33,595 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:33" (1/1) ... [2023-11-06 21:53:33,625 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 60 [2023-11-06 21:53:33,626 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:53:33,626 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:53:33,627 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:53:33,627 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:53:33,637 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:33" (1/1) ... [2023-11-06 21:53:33,637 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:33" (1/1) ... [2023-11-06 21:53:33,640 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:33" (1/1) ... [2023-11-06 21:53:33,641 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:33" (1/1) ... [2023-11-06 21:53:33,655 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:33" (1/1) ... [2023-11-06 21:53:33,665 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:33" (1/1) ... [2023-11-06 21:53:33,672 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:33" (1/1) ... [2023-11-06 21:53:33,674 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:33" (1/1) ... [2023-11-06 21:53:33,677 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:53:33,682 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:53:33,682 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:53:33,682 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:53:33,683 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:33" (1/1) ... [2023-11-06 21:53:33,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:53:33,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:33,715 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:53:33,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:53:33,768 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 21:53:33,769 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 21:53:33,770 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 21:53:33,771 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 21:53:33,771 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 21:53:33,771 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 21:53:33,771 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 21:53:33,771 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 21:53:33,772 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 21:53:33,772 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 21:53:33,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:53:33,772 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:53:33,773 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 21:53:33,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 21:53:33,775 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 21:53:33,937 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:53:33,940 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:53:34,257 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:53:34,308 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:53:34,309 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-06 21:53:34,311 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:53:34 BoogieIcfgContainer [2023-11-06 21:53:34,312 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:53:34,315 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:53:34,315 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:53:34,318 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:53:34,319 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:53:33" (1/3) ... [2023-11-06 21:53:34,320 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f1b5d50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:53:34, skipping insertion in model container [2023-11-06 21:53:34,320 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:33" (2/3) ... [2023-11-06 21:53:34,320 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f1b5d50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:53:34, skipping insertion in model container [2023-11-06 21:53:34,321 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:53:34" (3/3) ... [2023-11-06 21:53:34,322 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr-alt.wvr.c [2023-11-06 21:53:34,343 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:53:34,344 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-11-06 21:53:34,344 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 21:53:34,427 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 21:53:34,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 101 places, 100 transitions, 214 flow [2023-11-06 21:53:34,549 INFO L124 PetriNetUnfolderBase]: 6/98 cut-off events. [2023-11-06 21:53:34,550 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 21:53:34,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 98 events. 6/98 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 71 event pairs, 0 based on Foata normal form. 0/82 useless extension candidates. Maximal degree in co-relation 56. Up to 2 conditions per place. [2023-11-06 21:53:34,555 INFO L82 GeneralOperation]: Start removeDead. Operand has 101 places, 100 transitions, 214 flow [2023-11-06 21:53:34,561 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 94 places, 93 transitions, 198 flow [2023-11-06 21:53:34,565 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 21:53:34,578 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 94 places, 93 transitions, 198 flow [2023-11-06 21:53:34,581 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 94 places, 93 transitions, 198 flow [2023-11-06 21:53:34,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 94 places, 93 transitions, 198 flow [2023-11-06 21:53:34,610 INFO L124 PetriNetUnfolderBase]: 6/93 cut-off events. [2023-11-06 21:53:34,610 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 21:53:34,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 93 events. 6/93 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 70 event pairs, 0 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 56. Up to 2 conditions per place. [2023-11-06 21:53:34,613 INFO L119 LiptonReduction]: Number of co-enabled transitions 580 [2023-11-06 21:53:38,398 INFO L134 LiptonReduction]: Checked pairs total: 647 [2023-11-06 21:53:38,399 INFO L136 LiptonReduction]: Total number of compositions: 96 [2023-11-06 21:53:38,429 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:53:38,437 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;@50872dbc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 21:53:38,438 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-11-06 21:53:38,453 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 21:53:38,453 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-11-06 21:53:38,453 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 21:53:38,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:53:38,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-06 21:53:38,455 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 21:53:38,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:38,462 INFO L85 PathProgramCache]: Analyzing trace with hash 397, now seen corresponding path program 1 times [2023-11-06 21:53:38,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:38,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231045754] [2023-11-06 21:53:38,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:38,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:38,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:38,580 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 21:53:38,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:38,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231045754] [2023-11-06 21:53:38,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231045754] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:53:38,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:53:38,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-06 21:53:38,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641358909] [2023-11-06 21:53:38,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:53:38,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 21:53:38,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:38,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 21:53:38,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 21:53:38,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 196 [2023-11-06 21:53:38,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 60 flow. Second operand has 2 states, 2 states have (on average 89.5) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:38,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:53:38,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 196 [2023-11-06 21:53:38,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:53:38,714 INFO L124 PetriNetUnfolderBase]: 100/163 cut-off events. [2023-11-06 21:53:38,715 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-06 21:53:38,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 338 conditions, 163 events. 100/163 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 529 event pairs, 42 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 264. Up to 160 conditions per place. [2023-11-06 21:53:38,719 INFO L140 encePairwiseOnDemand]: 193/196 looper letters, 19 selfloop transitions, 0 changer transitions 0/21 dead transitions. [2023-11-06 21:53:38,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 21 transitions, 92 flow [2023-11-06 21:53:38,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 21:53:38,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-06 21:53:38,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 200 transitions. [2023-11-06 21:53:38,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5102040816326531 [2023-11-06 21:53:38,737 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 200 transitions. [2023-11-06 21:53:38,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 200 transitions. [2023-11-06 21:53:38,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:53:38,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 200 transitions. [2023-11-06 21:53:38,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 100.0) internal successors, (200), 2 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:38,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 196.0) internal successors, (588), 3 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:38,751 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 196.0) internal successors, (588), 3 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:38,754 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 60 flow. Second operand 2 states and 200 transitions. [2023-11-06 21:53:38,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 21 transitions, 92 flow [2023-11-06 21:53:38,757 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 21:53:38,759 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 46 flow [2023-11-06 21:53:38,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, 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 21:53:38,766 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2023-11-06 21:53:38,766 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 46 flow [2023-11-06 21:53:38,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 89.5) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:38,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:53:38,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 21:53:38,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 21:53:38,768 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 21:53:38,768 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:38,768 INFO L85 PathProgramCache]: Analyzing trace with hash 388251, now seen corresponding path program 1 times [2023-11-06 21:53:38,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:38,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178673937] [2023-11-06 21:53:38,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:38,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:38,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:38,924 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 21:53:38,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:38,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178673937] [2023-11-06 21:53:38,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178673937] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:53:38,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:53:38,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 21:53:38,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475676329] [2023-11-06 21:53:38,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:53:38,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:53:38,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:38,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:53:38,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:53:39,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 196 [2023-11-06 21:53:39,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:39,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:53:39,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 196 [2023-11-06 21:53:39,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:53:39,097 INFO L124 PetriNetUnfolderBase]: 93/150 cut-off events. [2023-11-06 21:53:39,097 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 21:53:39,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 150 events. 93/150 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 468 event pairs, 39 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 300. Up to 146 conditions per place. [2023-11-06 21:53:39,100 INFO L140 encePairwiseOnDemand]: 193/196 looper letters, 16 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2023-11-06 21:53:39,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 76 flow [2023-11-06 21:53:39,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:53:39,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:53:39,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 256 transitions. [2023-11-06 21:53:39,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2023-11-06 21:53:39,110 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 256 transitions. [2023-11-06 21:53:39,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 256 transitions. [2023-11-06 21:53:39,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:53:39,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 256 transitions. [2023-11-06 21:53:39,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:39,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 196.0) internal successors, (784), 4 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 21:53:39,118 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 196.0) internal successors, (784), 4 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 21:53:39,118 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 46 flow. Second operand 3 states and 256 transitions. [2023-11-06 21:53:39,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 19 transitions, 76 flow [2023-11-06 21:53:39,122 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 21:53:39,124 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 44 flow [2023-11-06 21:53:39,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, 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 21:53:39,125 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2023-11-06 21:53:39,125 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 44 flow [2023-11-06 21:53:39,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:39,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:53:39,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 21:53:39,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 21:53:39,127 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 21:53:39,127 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:39,127 INFO L85 PathProgramCache]: Analyzing trace with hash 388249, now seen corresponding path program 1 times [2023-11-06 21:53:39,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:39,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903136317] [2023-11-06 21:53:39,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:39,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:39,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:39,320 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 21:53:39,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:39,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903136317] [2023-11-06 21:53:39,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903136317] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:53:39,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:53:39,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 21:53:39,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009891132] [2023-11-06 21:53:39,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:53:39,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:53:39,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:39,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:53:39,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:53:39,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 196 [2023-11-06 21:53:39,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:39,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:53:39,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 196 [2023-11-06 21:53:39,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:53:39,431 INFO L124 PetriNetUnfolderBase]: 86/137 cut-off events. [2023-11-06 21:53:39,432 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 21:53:39,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 137 events. 86/137 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 410 event pairs, 36 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 275. Up to 133 conditions per place. [2023-11-06 21:53:39,434 INFO L140 encePairwiseOnDemand]: 193/196 looper letters, 14 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2023-11-06 21:53:39,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 17 transitions, 70 flow [2023-11-06 21:53:39,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:53:39,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:53:39,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 266 transitions. [2023-11-06 21:53:39,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2023-11-06 21:53:39,436 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 266 transitions. [2023-11-06 21:53:39,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 266 transitions. [2023-11-06 21:53:39,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:53:39,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 266 transitions. [2023-11-06 21:53:39,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:39,441 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 196.0) internal successors, (784), 4 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 21:53:39,442 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 196.0) internal successors, (784), 4 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 21:53:39,442 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 44 flow. Second operand 3 states and 266 transitions. [2023-11-06 21:53:39,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 17 transitions, 70 flow [2023-11-06 21:53:39,443 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 21:53:39,443 INFO L231 Difference]: Finished difference. Result has 22 places, 17 transitions, 41 flow [2023-11-06 21:53:39,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, 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 21:53:39,444 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-11-06 21:53:39,445 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 17 transitions, 41 flow [2023-11-06 21:53:39,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:39,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:53:39,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 21:53:39,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 21:53:39,446 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 21:53:39,446 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:39,446 INFO L85 PathProgramCache]: Analyzing trace with hash 373116831, now seen corresponding path program 1 times [2023-11-06 21:53:39,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:39,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531869483] [2023-11-06 21:53:39,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:39,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:39,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:39,502 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 21:53:39,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:39,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531869483] [2023-11-06 21:53:39,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531869483] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:53:39,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:53:39,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 21:53:39,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729556962] [2023-11-06 21:53:39,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:53:39,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:53:39,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:39,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:53:39,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:53:39,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 196 [2023-11-06 21:53:39,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 41 flow. Second operand has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:39,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:53:39,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 196 [2023-11-06 21:53:39,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:53:39,590 INFO L124 PetriNetUnfolderBase]: 65/107 cut-off events. [2023-11-06 21:53:39,590 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 21:53:39,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220 conditions, 107 events. 65/107 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 294 event pairs, 27 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 216. Up to 103 conditions per place. [2023-11-06 21:53:39,592 INFO L140 encePairwiseOnDemand]: 194/196 looper letters, 13 selfloop transitions, 1 changer transitions 0/16 dead transitions. [2023-11-06 21:53:39,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 16 transitions, 67 flow [2023-11-06 21:53:39,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:53:39,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:53:39,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 255 transitions. [2023-11-06 21:53:39,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4336734693877551 [2023-11-06 21:53:39,594 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 255 transitions. [2023-11-06 21:53:39,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 255 transitions. [2023-11-06 21:53:39,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:53:39,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 255 transitions. [2023-11-06 21:53:39,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:39,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 196.0) internal successors, (784), 4 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 21:53:39,598 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 196.0) internal successors, (784), 4 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 21:53:39,598 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 41 flow. Second operand 3 states and 255 transitions. [2023-11-06 21:53:39,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 16 transitions, 67 flow [2023-11-06 21:53:39,599 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 21:53:39,600 INFO L231 Difference]: Finished difference. Result has 22 places, 16 transitions, 40 flow [2023-11-06 21:53:39,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, 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 21:53:39,601 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-11-06 21:53:39,601 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 16 transitions, 40 flow [2023-11-06 21:53:39,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:39,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:53:39,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 21:53:39,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 21:53:39,602 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 21:53:39,603 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:39,603 INFO L85 PathProgramCache]: Analyzing trace with hash 373116830, now seen corresponding path program 1 times [2023-11-06 21:53:39,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:39,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167605067] [2023-11-06 21:53:39,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:39,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:39,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:39,692 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 21:53:39,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:39,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167605067] [2023-11-06 21:53:39,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167605067] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:53:39,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:53:39,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:53:39,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095921094] [2023-11-06 21:53:39,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:53:39,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:53:39,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:39,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:53:39,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:53:39,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 196 [2023-11-06 21:53:39,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 16 transitions, 40 flow. Second operand has 4 states, 4 states have (on average 76.25) internal successors, (305), 4 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:39,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:53:39,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 196 [2023-11-06 21:53:39,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:53:39,814 INFO L124 PetriNetUnfolderBase]: 44/77 cut-off events. [2023-11-06 21:53:39,814 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 21:53:39,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 77 events. 44/77 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 175 event pairs, 18 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 157. Up to 73 conditions per place. [2023-11-06 21:53:39,815 INFO L140 encePairwiseOnDemand]: 194/196 looper letters, 12 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2023-11-06 21:53:39,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 15 transitions, 64 flow [2023-11-06 21:53:39,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:53:39,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:53:39,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 239 transitions. [2023-11-06 21:53:39,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4064625850340136 [2023-11-06 21:53:39,818 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 239 transitions. [2023-11-06 21:53:39,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 239 transitions. [2023-11-06 21:53:39,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:53:39,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 239 transitions. [2023-11-06 21:53:39,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:39,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 196.0) internal successors, (784), 4 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 21:53:39,823 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 196.0) internal successors, (784), 4 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 21:53:39,824 INFO L175 Difference]: Start difference. First operand has 22 places, 16 transitions, 40 flow. Second operand 3 states and 239 transitions. [2023-11-06 21:53:39,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 15 transitions, 64 flow [2023-11-06 21:53:39,824 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 21:53:39,825 INFO L231 Difference]: Finished difference. Result has 22 places, 15 transitions, 39 flow [2023-11-06 21:53:39,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, 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 21:53:39,829 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-11-06 21:53:39,829 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 15 transitions, 39 flow [2023-11-06 21:53:39,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 76.25) internal successors, (305), 4 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:39,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:53:39,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:39,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 21:53:39,830 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 21:53:39,831 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:39,831 INFO L85 PathProgramCache]: Analyzing trace with hash -663941263, now seen corresponding path program 1 times [2023-11-06 21:53:39,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:39,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198053730] [2023-11-06 21:53:39,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:39,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:39,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:39,990 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 21:53:39,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:39,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198053730] [2023-11-06 21:53:39,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198053730] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:53:39,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:53:39,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:53:39,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721264953] [2023-11-06 21:53:39,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:53:39,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:53:39,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:39,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:53:39,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:53:40,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 196 [2023-11-06 21:53:40,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 15 transitions, 39 flow. Second operand has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:40,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:53:40,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 196 [2023-11-06 21:53:40,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:53:40,073 INFO L124 PetriNetUnfolderBase]: 54/95 cut-off events. [2023-11-06 21:53:40,073 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 21:53:40,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201 conditions, 95 events. 54/95 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 244 event pairs, 10 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 197. Up to 73 conditions per place. [2023-11-06 21:53:40,074 INFO L140 encePairwiseOnDemand]: 192/196 looper letters, 17 selfloop transitions, 3 changer transitions 0/21 dead transitions. [2023-11-06 21:53:40,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 21 transitions, 92 flow [2023-11-06 21:53:40,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:53:40,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 21:53:40,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 353 transitions. [2023-11-06 21:53:40,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4502551020408163 [2023-11-06 21:53:40,077 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 353 transitions. [2023-11-06 21:53:40,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 353 transitions. [2023-11-06 21:53:40,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:53:40,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 353 transitions. [2023-11-06 21:53:40,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 88.25) internal successors, (353), 4 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:40,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 196.0) internal successors, (980), 5 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:40,083 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 196.0) internal successors, (980), 5 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:40,083 INFO L175 Difference]: Start difference. First operand has 22 places, 15 transitions, 39 flow. Second operand 4 states and 353 transitions. [2023-11-06 21:53:40,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 21 transitions, 92 flow [2023-11-06 21:53:40,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 21 transitions, 91 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 21:53:40,085 INFO L231 Difference]: Finished difference. Result has 25 places, 16 transitions, 52 flow [2023-11-06 21:53:40,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=52, PETRI_PLACES=25, PETRI_TRANSITIONS=16} [2023-11-06 21:53:40,086 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -4 predicate places. [2023-11-06 21:53:40,086 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 16 transitions, 52 flow [2023-11-06 21:53:40,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:40,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:53:40,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:40,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 21:53:40,088 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 21:53:40,088 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:40,088 INFO L85 PathProgramCache]: Analyzing trace with hash -150241259, now seen corresponding path program 1 times [2023-11-06 21:53:40,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:40,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017771411] [2023-11-06 21:53:40,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:40,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:40,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:40,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:53:40,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:40,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017771411] [2023-11-06 21:53:40,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017771411] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:53:40,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:53:40,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:53:40,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994779077] [2023-11-06 21:53:40,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:53:40,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:53:40,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:40,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:53:40,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:53:40,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 196 [2023-11-06 21:53:40,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 16 transitions, 52 flow. Second operand has 4 states, 4 states have (on average 88.25) internal successors, (353), 4 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:40,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:53:40,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 196 [2023-11-06 21:53:40,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:53:40,230 INFO L124 PetriNetUnfolderBase]: 51/93 cut-off events. [2023-11-06 21:53:40,230 INFO L125 PetriNetUnfolderBase]: For 21/30 co-relation queries the response was YES. [2023-11-06 21:53:40,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240 conditions, 93 events. 51/93 cut-off events. For 21/30 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 220 event pairs, 24 based on Foata normal form. 9/84 useless extension candidates. Maximal degree in co-relation 235. Up to 73 conditions per place. [2023-11-06 21:53:40,232 INFO L140 encePairwiseOnDemand]: 192/196 looper letters, 19 selfloop transitions, 3 changer transitions 0/23 dead transitions. [2023-11-06 21:53:40,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 23 transitions, 118 flow [2023-11-06 21:53:40,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:53:40,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 21:53:40,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 361 transitions. [2023-11-06 21:53:40,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4604591836734694 [2023-11-06 21:53:40,236 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 361 transitions. [2023-11-06 21:53:40,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 361 transitions. [2023-11-06 21:53:40,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:53:40,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 361 transitions. [2023-11-06 21:53:40,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 90.25) internal successors, (361), 4 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:40,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 196.0) internal successors, (980), 5 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:40,241 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 196.0) internal successors, (980), 5 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:40,241 INFO L175 Difference]: Start difference. First operand has 25 places, 16 transitions, 52 flow. Second operand 4 states and 361 transitions. [2023-11-06 21:53:40,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 23 transitions, 118 flow [2023-11-06 21:53:40,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 23 transitions, 109 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-06 21:53:40,243 INFO L231 Difference]: Finished difference. Result has 27 places, 17 transitions, 60 flow [2023-11-06 21:53:40,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=60, PETRI_PLACES=27, PETRI_TRANSITIONS=17} [2023-11-06 21:53:40,244 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -2 predicate places. [2023-11-06 21:53:40,244 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 17 transitions, 60 flow [2023-11-06 21:53:40,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 88.25) internal successors, (353), 4 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:40,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:53:40,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:40,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 21:53:40,246 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 21:53:40,246 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:40,247 INFO L85 PathProgramCache]: Analyzing trace with hash -666792009, now seen corresponding path program 1 times [2023-11-06 21:53:40,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:40,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390356582] [2023-11-06 21:53:40,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:40,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:40,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:40,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:53:40,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:40,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390356582] [2023-11-06 21:53:40,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390356582] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:53:40,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297862619] [2023-11-06 21:53:40,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:40,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:40,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:40,543 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:53:40,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 21:53:40,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:40,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 21:53:40,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:53:41,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:53:41,040 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:53:41,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:53:41,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297862619] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:53:41,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:53:41,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-11-06 21:53:41,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948126037] [2023-11-06 21:53:41,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:53:41,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 21:53:41,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:41,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 21:53:41,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2023-11-06 21:53:41,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 196 [2023-11-06 21:53:41,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 17 transitions, 60 flow. Second operand has 21 states, 21 states have (on average 77.85714285714286) internal successors, (1635), 21 states have internal predecessors, (1635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:41,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:53:41,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 196 [2023-11-06 21:53:41,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:53:42,673 INFO L124 PetriNetUnfolderBase]: 167/324 cut-off events. [2023-11-06 21:53:42,673 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-11-06 21:53:42,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 892 conditions, 324 events. 167/324 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1256 event pairs, 20 based on Foata normal form. 2/252 useless extension candidates. Maximal degree in co-relation 886. Up to 107 conditions per place. [2023-11-06 21:53:42,677 INFO L140 encePairwiseOnDemand]: 188/196 looper letters, 66 selfloop transitions, 30 changer transitions 29/125 dead transitions. [2023-11-06 21:53:42,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 125 transitions, 646 flow [2023-11-06 21:53:42,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-06 21:53:42,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-06 21:53:42,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1718 transitions. [2023-11-06 21:53:42,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173955296404276 [2023-11-06 21:53:42,686 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1718 transitions. [2023-11-06 21:53:42,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1718 transitions. [2023-11-06 21:53:42,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:53:42,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1718 transitions. [2023-11-06 21:53:42,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 81.80952380952381) internal successors, (1718), 21 states have internal predecessors, (1718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:42,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 196.0) internal successors, (4312), 22 states have internal predecessors, (4312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:42,705 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 196.0) internal successors, (4312), 22 states have internal predecessors, (4312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:42,706 INFO L175 Difference]: Start difference. First operand has 27 places, 17 transitions, 60 flow. Second operand 21 states and 1718 transitions. [2023-11-06 21:53:42,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 125 transitions, 646 flow [2023-11-06 21:53:42,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 125 transitions, 615 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-11-06 21:53:42,711 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 285 flow [2023-11-06 21:53:42,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=285, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2023-11-06 21:53:42,712 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 26 predicate places. [2023-11-06 21:53:42,712 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 285 flow [2023-11-06 21:53:42,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 77.85714285714286) internal successors, (1635), 21 states have internal predecessors, (1635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:42,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:53:42,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:42,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 21:53:42,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:42,925 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 21:53:42,925 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:42,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1228115873, now seen corresponding path program 2 times [2023-11-06 21:53:42,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:42,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805116254] [2023-11-06 21:53:42,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:42,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:42,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:43,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:53:43,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:43,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805116254] [2023-11-06 21:53:43,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805116254] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:53:43,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859918247] [2023-11-06 21:53:43,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:53:43,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:43,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:43,202 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:53:43,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 21:53:43,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:53:43,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:53:43,288 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 21:53:43,290 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:53:43,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:53:43,518 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:53:44,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:53:44,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859918247] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:53:44,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:53:44,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-11-06 21:53:44,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979915699] [2023-11-06 21:53:44,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:53:44,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 21:53:44,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:44,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 21:53:44,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2023-11-06 21:53:44,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 196 [2023-11-06 21:53:44,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 285 flow. Second operand has 21 states, 21 states have (on average 77.80952380952381) internal successors, (1634), 21 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:44,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:53:44,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 196 [2023-11-06 21:53:44,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:53:45,103 INFO L124 PetriNetUnfolderBase]: 164/338 cut-off events. [2023-11-06 21:53:45,103 INFO L125 PetriNetUnfolderBase]: For 786/786 co-relation queries the response was YES. [2023-11-06 21:53:45,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1332 conditions, 338 events. 164/338 cut-off events. For 786/786 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1417 event pairs, 22 based on Foata normal form. 2/314 useless extension candidates. Maximal degree in co-relation 1316. Up to 119 conditions per place. [2023-11-06 21:53:45,107 INFO L140 encePairwiseOnDemand]: 188/196 looper letters, 62 selfloop transitions, 33 changer transitions 20/115 dead transitions. [2023-11-06 21:53:45,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 115 transitions, 797 flow [2023-11-06 21:53:45,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 21:53:45,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-06 21:53:45,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1554 transitions. [2023-11-06 21:53:45,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41729323308270677 [2023-11-06 21:53:45,115 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1554 transitions. [2023-11-06 21:53:45,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1554 transitions. [2023-11-06 21:53:45,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:53:45,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1554 transitions. [2023-11-06 21:53:45,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 81.78947368421052) internal successors, (1554), 19 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:45,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 196.0) internal successors, (3920), 20 states have internal predecessors, (3920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:45,131 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 196.0) internal successors, (3920), 20 states have internal predecessors, (3920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:45,131 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 285 flow. Second operand 19 states and 1554 transitions. [2023-11-06 21:53:45,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 115 transitions, 797 flow [2023-11-06 21:53:45,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 115 transitions, 703 flow, removed 41 selfloop flow, removed 5 redundant places. [2023-11-06 21:53:45,142 INFO L231 Difference]: Finished difference. Result has 70 places, 50 transitions, 344 flow [2023-11-06 21:53:45,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=344, PETRI_PLACES=70, PETRI_TRANSITIONS=50} [2023-11-06 21:53:45,143 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 41 predicate places. [2023-11-06 21:53:45,143 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 50 transitions, 344 flow [2023-11-06 21:53:45,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 77.80952380952381) internal successors, (1634), 21 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:45,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:53:45,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:45,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 21:53:45,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:45,350 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 21:53:45,351 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:45,351 INFO L85 PathProgramCache]: Analyzing trace with hash 754285543, now seen corresponding path program 3 times [2023-11-06 21:53:45,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:45,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466036766] [2023-11-06 21:53:45,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:45,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:45,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:45,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:53:45,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:45,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466036766] [2023-11-06 21:53:45,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466036766] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:53:45,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042130929] [2023-11-06 21:53:45,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:53:45,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:45,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:45,676 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:53:45,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 21:53:45,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 21:53:45,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:53:45,757 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 21:53:45,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:53:45,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:53:45,999 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:53:46,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:53:46,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042130929] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:53:46,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:53:46,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-11-06 21:53:46,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624211004] [2023-11-06 21:53:46,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:53:46,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 21:53:46,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:46,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 21:53:46,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2023-11-06 21:53:46,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 196 [2023-11-06 21:53:46,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 50 transitions, 344 flow. Second operand has 21 states, 21 states have (on average 77.71428571428571) internal successors, (1632), 21 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:46,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:53:46,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 196 [2023-11-06 21:53:46,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:53:47,327 INFO L124 PetriNetUnfolderBase]: 167/340 cut-off events. [2023-11-06 21:53:47,327 INFO L125 PetriNetUnfolderBase]: For 784/784 co-relation queries the response was YES. [2023-11-06 21:53:47,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1417 conditions, 340 events. 167/340 cut-off events. For 784/784 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1391 event pairs, 20 based on Foata normal form. 1/341 useless extension candidates. Maximal degree in co-relation 1398. Up to 135 conditions per place. [2023-11-06 21:53:47,332 INFO L140 encePairwiseOnDemand]: 188/196 looper letters, 64 selfloop transitions, 38 changer transitions 16/118 dead transitions. [2023-11-06 21:53:47,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 118 transitions, 888 flow [2023-11-06 21:53:47,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 21:53:47,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-06 21:53:47,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1471 transitions. [2023-11-06 21:53:47,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4169501133786848 [2023-11-06 21:53:47,339 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1471 transitions. [2023-11-06 21:53:47,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1471 transitions. [2023-11-06 21:53:47,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:53:47,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1471 transitions. [2023-11-06 21:53:47,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 81.72222222222223) internal successors, (1471), 18 states have internal predecessors, (1471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:47,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 196.0) internal successors, (3724), 19 states have internal predecessors, (3724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:47,354 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 196.0) internal successors, (3724), 19 states have internal predecessors, (3724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:47,355 INFO L175 Difference]: Start difference. First operand has 70 places, 50 transitions, 344 flow. Second operand 18 states and 1471 transitions. [2023-11-06 21:53:47,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 118 transitions, 888 flow [2023-11-06 21:53:47,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 118 transitions, 764 flow, removed 22 selfloop flow, removed 15 redundant places. [2023-11-06 21:53:47,364 INFO L231 Difference]: Finished difference. Result has 71 places, 59 transitions, 409 flow [2023-11-06 21:53:47,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=409, PETRI_PLACES=71, PETRI_TRANSITIONS=59} [2023-11-06 21:53:47,365 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 42 predicate places. [2023-11-06 21:53:47,365 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 59 transitions, 409 flow [2023-11-06 21:53:47,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 77.71428571428571) internal successors, (1632), 21 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:47,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:53:47,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:47,374 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-06 21:53:47,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 21:53:47,572 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 21:53:47,572 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:47,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1418232003, now seen corresponding path program 4 times [2023-11-06 21:53:47,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:47,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463169673] [2023-11-06 21:53:47,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:47,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:47,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:47,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:53:47,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:47,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463169673] [2023-11-06 21:53:47,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463169673] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:53:47,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591992371] [2023-11-06 21:53:47,714 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 21:53:47,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:47,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:47,715 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:53:47,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 21:53:47,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 21:53:47,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:53:47,795 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 21:53:47,797 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:53:47,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:53:47,818 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:53:47,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:53:47,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591992371] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:53:47,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:53:47,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2023-11-06 21:53:47,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143482626] [2023-11-06 21:53:47,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:53:47,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 21:53:47,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:47,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 21:53:47,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:53:47,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 196 [2023-11-06 21:53:47,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 59 transitions, 409 flow. Second operand has 6 states, 6 states have (on average 86.5) internal successors, (519), 6 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:47,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:53:47,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 196 [2023-11-06 21:53:47,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:53:47,991 INFO L124 PetriNetUnfolderBase]: 153/296 cut-off events. [2023-11-06 21:53:47,991 INFO L125 PetriNetUnfolderBase]: For 798/802 co-relation queries the response was YES. [2023-11-06 21:53:47,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1217 conditions, 296 events. 153/296 cut-off events. For 798/802 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1077 event pairs, 22 based on Foata normal form. 22/317 useless extension candidates. Maximal degree in co-relation 1199. Up to 229 conditions per place. [2023-11-06 21:53:47,995 INFO L140 encePairwiseOnDemand]: 191/196 looper letters, 49 selfloop transitions, 12 changer transitions 1/64 dead transitions. [2023-11-06 21:53:47,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 64 transitions, 546 flow [2023-11-06 21:53:47,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:53:47,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 21:53:47,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 445 transitions. [2023-11-06 21:53:47,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45408163265306123 [2023-11-06 21:53:47,998 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 445 transitions. [2023-11-06 21:53:47,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 445 transitions. [2023-11-06 21:53:47,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:53:47,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 445 transitions. [2023-11-06 21:53:48,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 89.0) internal successors, (445), 5 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:48,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 196.0) internal successors, (1176), 6 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:48,003 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 196.0) internal successors, (1176), 6 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:48,004 INFO L175 Difference]: Start difference. First operand has 71 places, 59 transitions, 409 flow. Second operand 5 states and 445 transitions. [2023-11-06 21:53:48,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 64 transitions, 546 flow [2023-11-06 21:53:48,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 64 transitions, 495 flow, removed 4 selfloop flow, removed 8 redundant places. [2023-11-06 21:53:48,011 INFO L231 Difference]: Finished difference. Result has 61 places, 52 transitions, 368 flow [2023-11-06 21:53:48,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=368, PETRI_PLACES=61, PETRI_TRANSITIONS=52} [2023-11-06 21:53:48,012 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 32 predicate places. [2023-11-06 21:53:48,012 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 52 transitions, 368 flow [2023-11-06 21:53:48,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 86.5) internal successors, (519), 6 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:48,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:53:48,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:48,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 21:53:48,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 21:53:48,219 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 21:53:48,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:48,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1461853935, now seen corresponding path program 5 times [2023-11-06 21:53:48,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:48,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792199493] [2023-11-06 21:53:48,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:48,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:48,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:48,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:53:48,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:48,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792199493] [2023-11-06 21:53:48,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792199493] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:53:48,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137009667] [2023-11-06 21:53:48,529 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 21:53:48,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:48,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:48,530 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:53:48,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 21:53:48,603 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:53:48,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:53:48,605 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 21:53:48,606 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:53:48,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:53:48,815 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:53:49,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:53:49,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137009667] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:53:49,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:53:49,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-11-06 21:53:49,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828220725] [2023-11-06 21:53:49,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:53:49,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 21:53:49,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:49,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 21:53:49,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2023-11-06 21:53:49,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 196 [2023-11-06 21:53:49,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 52 transitions, 368 flow. Second operand has 20 states, 20 states have (on average 77.8) internal successors, (1556), 20 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:49,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:53:49,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 196 [2023-11-06 21:53:49,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:53:50,196 INFO L124 PetriNetUnfolderBase]: 244/493 cut-off events. [2023-11-06 21:53:50,196 INFO L125 PetriNetUnfolderBase]: For 1595/1595 co-relation queries the response was YES. [2023-11-06 21:53:50,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2117 conditions, 493 events. 244/493 cut-off events. For 1595/1595 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2275 event pairs, 26 based on Foata normal form. 2/495 useless extension candidates. Maximal degree in co-relation 2099. Up to 261 conditions per place. [2023-11-06 21:53:50,202 INFO L140 encePairwiseOnDemand]: 188/196 looper letters, 88 selfloop transitions, 37 changer transitions 13/138 dead transitions. [2023-11-06 21:53:50,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 138 transitions, 1095 flow [2023-11-06 21:53:50,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-06 21:53:50,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-06 21:53:50,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1705 transitions. [2023-11-06 21:53:50,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142371234207969 [2023-11-06 21:53:50,210 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1705 transitions. [2023-11-06 21:53:50,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1705 transitions. [2023-11-06 21:53:50,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:53:50,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1705 transitions. [2023-11-06 21:53:50,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 81.19047619047619) internal successors, (1705), 21 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:50,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 196.0) internal successors, (4312), 22 states have internal predecessors, (4312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:50,227 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 196.0) internal successors, (4312), 22 states have internal predecessors, (4312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:50,227 INFO L175 Difference]: Start difference. First operand has 61 places, 52 transitions, 368 flow. Second operand 21 states and 1705 transitions. [2023-11-06 21:53:50,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 138 transitions, 1095 flow [2023-11-06 21:53:50,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 138 transitions, 1057 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-11-06 21:53:50,238 INFO L231 Difference]: Finished difference. Result has 90 places, 72 transitions, 644 flow [2023-11-06 21:53:50,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=644, PETRI_PLACES=90, PETRI_TRANSITIONS=72} [2023-11-06 21:53:50,239 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 61 predicate places. [2023-11-06 21:53:50,240 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 72 transitions, 644 flow [2023-11-06 21:53:50,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 77.8) internal successors, (1556), 20 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:50,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:53:50,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:50,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 21:53:50,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 21:53:50,458 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 21:53:50,460 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:50,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1307627847, now seen corresponding path program 6 times [2023-11-06 21:53:50,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:50,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287501290] [2023-11-06 21:53:50,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:50,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:50,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:50,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:53:50,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:50,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287501290] [2023-11-06 21:53:50,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287501290] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:53:50,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299880674] [2023-11-06 21:53:50,798 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 21:53:50,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:50,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:50,800 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:53:50,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 21:53:50,881 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 21:53:50,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:53:50,882 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 21:53:50,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:53:51,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:53:51,073 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:53:51,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:53:51,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299880674] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:53:51,533 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:53:51,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-11-06 21:53:51,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974926411] [2023-11-06 21:53:51,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:53:51,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 21:53:51,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:51,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 21:53:51,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2023-11-06 21:53:51,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 196 [2023-11-06 21:53:51,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 72 transitions, 644 flow. Second operand has 21 states, 21 states have (on average 77.71428571428571) internal successors, (1632), 21 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:51,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:53:51,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 196 [2023-11-06 21:53:51,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:53:52,432 INFO L124 PetriNetUnfolderBase]: 235/468 cut-off events. [2023-11-06 21:53:52,432 INFO L125 PetriNetUnfolderBase]: For 2305/2305 co-relation queries the response was YES. [2023-11-06 21:53:52,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2326 conditions, 468 events. 235/468 cut-off events. For 2305/2305 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2084 event pairs, 30 based on Foata normal form. 1/469 useless extension candidates. Maximal degree in co-relation 2297. Up to 341 conditions per place. [2023-11-06 21:53:52,438 INFO L140 encePairwiseOnDemand]: 188/196 looper letters, 77 selfloop transitions, 25 changer transitions 11/113 dead transitions. [2023-11-06 21:53:52,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 113 transitions, 1106 flow [2023-11-06 21:53:52,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 21:53:52,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-06 21:53:52,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1208 transitions. [2023-11-06 21:53:52,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108843537414966 [2023-11-06 21:53:52,472 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1208 transitions. [2023-11-06 21:53:52,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1208 transitions. [2023-11-06 21:53:52,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:53:52,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1208 transitions. [2023-11-06 21:53:52,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 80.53333333333333) internal successors, (1208), 15 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:52,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 196.0) internal successors, (3136), 16 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:52,484 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 196.0) internal successors, (3136), 16 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:52,484 INFO L175 Difference]: Start difference. First operand has 90 places, 72 transitions, 644 flow. Second operand 15 states and 1208 transitions. [2023-11-06 21:53:52,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 113 transitions, 1106 flow [2023-11-06 21:53:52,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 113 transitions, 1023 flow, removed 27 selfloop flow, removed 8 redundant places. [2023-11-06 21:53:52,502 INFO L231 Difference]: Finished difference. Result has 96 places, 75 transitions, 666 flow [2023-11-06 21:53:52,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=571, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=666, PETRI_PLACES=96, PETRI_TRANSITIONS=75} [2023-11-06 21:53:52,504 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 67 predicate places. [2023-11-06 21:53:52,504 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 75 transitions, 666 flow [2023-11-06 21:53:52,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 77.71428571428571) internal successors, (1632), 21 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:52,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:53:52,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:52,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 21:53:52,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 21:53:52,711 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 21:53:52,712 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:52,712 INFO L85 PathProgramCache]: Analyzing trace with hash -674773569, now seen corresponding path program 7 times [2023-11-06 21:53:52,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:52,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122979875] [2023-11-06 21:53:52,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:52,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:52,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:53,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:53:53,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:53,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122979875] [2023-11-06 21:53:53,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122979875] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:53:53,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610470504] [2023-11-06 21:53:53,005 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 21:53:53,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:53,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:53,006 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:53:53,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 21:53:53,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:53,081 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 21:53:53,082 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:53:53,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:53:53,307 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:53:53,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:53:53,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610470504] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:53:53,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:53:53,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-11-06 21:53:53,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711612029] [2023-11-06 21:53:53,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:53:53,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 21:53:53,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:53,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 21:53:53,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2023-11-06 21:53:54,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 196 [2023-11-06 21:53:54,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 75 transitions, 666 flow. Second operand has 21 states, 21 states have (on average 77.80952380952381) internal successors, (1634), 21 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:54,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:53:54,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 196 [2023-11-06 21:53:54,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:53:54,678 INFO L124 PetriNetUnfolderBase]: 226/445 cut-off events. [2023-11-06 21:53:54,678 INFO L125 PetriNetUnfolderBase]: For 2127/2127 co-relation queries the response was YES. [2023-11-06 21:53:54,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2202 conditions, 445 events. 226/445 cut-off events. For 2127/2127 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1908 event pairs, 28 based on Foata normal form. 1/446 useless extension candidates. Maximal degree in co-relation 2172. Up to 331 conditions per place. [2023-11-06 21:53:54,684 INFO L140 encePairwiseOnDemand]: 188/196 looper letters, 75 selfloop transitions, 21 changer transitions 14/110 dead transitions. [2023-11-06 21:53:54,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 110 transitions, 1023 flow [2023-11-06 21:53:54,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 21:53:54,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-06 21:53:54,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1211 transitions. [2023-11-06 21:53:54,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119047619047619 [2023-11-06 21:53:54,689 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1211 transitions. [2023-11-06 21:53:54,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1211 transitions. [2023-11-06 21:53:54,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:53:54,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1211 transitions. [2023-11-06 21:53:54,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 80.73333333333333) internal successors, (1211), 15 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:54,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 196.0) internal successors, (3136), 16 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:54,717 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 196.0) internal successors, (3136), 16 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:54,718 INFO L175 Difference]: Start difference. First operand has 96 places, 75 transitions, 666 flow. Second operand 15 states and 1211 transitions. [2023-11-06 21:53:54,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 110 transitions, 1023 flow [2023-11-06 21:53:54,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 110 transitions, 973 flow, removed 13 selfloop flow, removed 9 redundant places. [2023-11-06 21:53:54,737 INFO L231 Difference]: Finished difference. Result has 97 places, 70 transitions, 610 flow [2023-11-06 21:53:54,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=611, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=610, PETRI_PLACES=97, PETRI_TRANSITIONS=70} [2023-11-06 21:53:54,738 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 68 predicate places. [2023-11-06 21:53:54,738 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 70 transitions, 610 flow [2023-11-06 21:53:54,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 77.80952380952381) internal successors, (1634), 21 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:54,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:53:54,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:54,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 21:53:54,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 21:53:54,945 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 21:53:54,946 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:54,946 INFO L85 PathProgramCache]: Analyzing trace with hash -127027055, now seen corresponding path program 8 times [2023-11-06 21:53:54,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:54,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419795245] [2023-11-06 21:53:54,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:54,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:54,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:55,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:53:55,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:55,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419795245] [2023-11-06 21:53:55,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419795245] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:53:55,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951289114] [2023-11-06 21:53:55,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:53:55,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:55,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:55,211 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:53:55,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 21:53:55,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:53:55,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:53:55,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 21:53:55,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:53:55,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:53:55,517 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:53:55,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:53:55,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951289114] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:53:55,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:53:55,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-11-06 21:53:55,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540672736] [2023-11-06 21:53:55,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:53:55,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 21:53:55,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:55,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 21:53:55,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2023-11-06 21:53:56,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 196 [2023-11-06 21:53:56,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 70 transitions, 610 flow. Second operand has 21 states, 21 states have (on average 77.76190476190476) internal successors, (1633), 21 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:56,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:53:56,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 196 [2023-11-06 21:53:56,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:53:56,962 INFO L124 PetriNetUnfolderBase]: 234/462 cut-off events. [2023-11-06 21:53:56,962 INFO L125 PetriNetUnfolderBase]: For 1747/1747 co-relation queries the response was YES. [2023-11-06 21:53:56,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2199 conditions, 462 events. 234/462 cut-off events. For 1747/1747 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1996 event pairs, 18 based on Foata normal form. 2/464 useless extension candidates. Maximal degree in co-relation 2171. Up to 300 conditions per place. [2023-11-06 21:53:56,968 INFO L140 encePairwiseOnDemand]: 187/196 looper letters, 77 selfloop transitions, 27 changer transitions 20/124 dead transitions. [2023-11-06 21:53:56,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 124 transitions, 1133 flow [2023-11-06 21:53:56,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 21:53:56,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-06 21:53:56,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1143 transitions. [2023-11-06 21:53:56,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4165451895043732 [2023-11-06 21:53:56,973 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1143 transitions. [2023-11-06 21:53:56,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1143 transitions. [2023-11-06 21:53:56,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:53:56,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1143 transitions. [2023-11-06 21:53:56,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 81.64285714285714) internal successors, (1143), 14 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:56,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 196.0) internal successors, (2940), 15 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:56,981 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 196.0) internal successors, (2940), 15 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:56,982 INFO L175 Difference]: Start difference. First operand has 97 places, 70 transitions, 610 flow. Second operand 14 states and 1143 transitions. [2023-11-06 21:53:56,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 124 transitions, 1133 flow [2023-11-06 21:53:56,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 124 transitions, 1064 flow, removed 8 selfloop flow, removed 14 redundant places. [2023-11-06 21:53:56,993 INFO L231 Difference]: Finished difference. Result has 99 places, 75 transitions, 680 flow [2023-11-06 21:53:56,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=549, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=680, PETRI_PLACES=99, PETRI_TRANSITIONS=75} [2023-11-06 21:53:56,994 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 70 predicate places. [2023-11-06 21:53:56,994 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 75 transitions, 680 flow [2023-11-06 21:53:56,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 77.76190476190476) internal successors, (1633), 21 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:56,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:53:56,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:57,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 21:53:57,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 21:53:57,208 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 21:53:57,208 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:57,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1848109201, now seen corresponding path program 9 times [2023-11-06 21:53:57,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:57,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618621460] [2023-11-06 21:53:57,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:57,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:57,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:57,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:53:57,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:57,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618621460] [2023-11-06 21:53:57,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618621460] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:53:57,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936259991] [2023-11-06 21:53:57,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:53:57,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:57,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:57,436 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:53:57,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 21:53:57,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 21:53:57,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:53:57,534 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 21:53:57,535 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:53:57,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:53:57,729 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:53:58,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:53:58,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936259991] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:53:58,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:53:58,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-11-06 21:53:58,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590614554] [2023-11-06 21:53:58,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:53:58,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 21:53:58,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:58,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 21:53:58,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2023-11-06 21:53:58,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 196 [2023-11-06 21:53:58,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 75 transitions, 680 flow. Second operand has 21 states, 21 states have (on average 77.71428571428571) internal successors, (1632), 21 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:58,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:53:58,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 196 [2023-11-06 21:53:58,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:53:58,975 INFO L124 PetriNetUnfolderBase]: 206/396 cut-off events. [2023-11-06 21:53:58,975 INFO L125 PetriNetUnfolderBase]: For 1646/1646 co-relation queries the response was YES. [2023-11-06 21:53:58,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2010 conditions, 396 events. 206/396 cut-off events. For 1646/1646 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1558 event pairs, 16 based on Foata normal form. 1/397 useless extension candidates. Maximal degree in co-relation 1976. Up to 301 conditions per place. [2023-11-06 21:53:58,981 INFO L140 encePairwiseOnDemand]: 188/196 looper letters, 71 selfloop transitions, 25 changer transitions 9/105 dead transitions. [2023-11-06 21:53:58,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 105 transitions, 1062 flow [2023-11-06 21:53:58,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 21:53:58,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-06 21:53:58,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1046 transitions. [2023-11-06 21:53:58,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41051805337519626 [2023-11-06 21:53:58,984 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1046 transitions. [2023-11-06 21:53:58,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1046 transitions. [2023-11-06 21:53:58,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:53:58,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1046 transitions. [2023-11-06 21:53:58,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 80.46153846153847) internal successors, (1046), 13 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:58,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 196.0) internal successors, (2744), 14 states have internal predecessors, (2744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:58,992 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 196.0) internal successors, (2744), 14 states have internal predecessors, (2744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:58,993 INFO L175 Difference]: Start difference. First operand has 99 places, 75 transitions, 680 flow. Second operand 13 states and 1046 transitions. [2023-11-06 21:53:58,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 105 transitions, 1062 flow [2023-11-06 21:53:59,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 105 transitions, 939 flow, removed 36 selfloop flow, removed 15 redundant places. [2023-11-06 21:53:59,004 INFO L231 Difference]: Finished difference. Result has 93 places, 76 transitions, 658 flow [2023-11-06 21:53:59,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=584, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=658, PETRI_PLACES=93, PETRI_TRANSITIONS=76} [2023-11-06 21:53:59,005 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 64 predicate places. [2023-11-06 21:53:59,006 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 76 transitions, 658 flow [2023-11-06 21:53:59,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 77.71428571428571) internal successors, (1632), 21 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:53:59,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:53:59,007 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:59,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 21:53:59,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 21:53:59,224 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 21:53:59,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:59,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1007452765, now seen corresponding path program 10 times [2023-11-06 21:53:59,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:59,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347658393] [2023-11-06 21:53:59,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:59,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:59,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:59,511 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 21:53:59,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:59,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347658393] [2023-11-06 21:53:59,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347658393] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:53:59,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991715569] [2023-11-06 21:53:59,512 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 21:53:59,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:59,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:59,513 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:53:59,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 21:53:59,601 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 21:53:59,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:53:59,602 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 21:53:59,604 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:53:59,851 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 21:53:59,851 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:00,310 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:00,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991715569] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:00,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:54:00,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-06 21:54:00,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288746421] [2023-11-06 21:54:00,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:00,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 21:54:00,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:00,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 21:54:00,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2023-11-06 21:54:00,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 196 [2023-11-06 21:54:00,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 76 transitions, 658 flow. Second operand has 25 states, 25 states have (on average 77.8) internal successors, (1945), 25 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:00,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:00,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 196 [2023-11-06 21:54:00,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:02,112 INFO L124 PetriNetUnfolderBase]: 290/572 cut-off events. [2023-11-06 21:54:02,113 INFO L125 PetriNetUnfolderBase]: For 2337/2337 co-relation queries the response was YES. [2023-11-06 21:54:02,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2794 conditions, 572 events. 290/572 cut-off events. For 2337/2337 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2669 event pairs, 14 based on Foata normal form. 3/575 useless extension candidates. Maximal degree in co-relation 2769. Up to 199 conditions per place. [2023-11-06 21:54:02,120 INFO L140 encePairwiseOnDemand]: 188/196 looper letters, 102 selfloop transitions, 84 changer transitions 20/206 dead transitions. [2023-11-06 21:54:02,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 206 transitions, 1778 flow [2023-11-06 21:54:02,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-06 21:54:02,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-06 21:54:02,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2442 transitions. [2023-11-06 21:54:02,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4153061224489796 [2023-11-06 21:54:02,125 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2442 transitions. [2023-11-06 21:54:02,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2442 transitions. [2023-11-06 21:54:02,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:02,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2442 transitions. [2023-11-06 21:54:02,132 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 81.4) internal successors, (2442), 30 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:02,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 196.0) internal successors, (6076), 31 states have internal predecessors, (6076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:02,142 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 196.0) internal successors, (6076), 31 states have internal predecessors, (6076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:02,142 INFO L175 Difference]: Start difference. First operand has 93 places, 76 transitions, 658 flow. Second operand 30 states and 2442 transitions. [2023-11-06 21:54:02,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 206 transitions, 1778 flow [2023-11-06 21:54:02,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 206 transitions, 1670 flow, removed 18 selfloop flow, removed 12 redundant places. [2023-11-06 21:54:02,165 INFO L231 Difference]: Finished difference. Result has 115 places, 111 transitions, 1114 flow [2023-11-06 21:54:02,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1114, PETRI_PLACES=115, PETRI_TRANSITIONS=111} [2023-11-06 21:54:02,166 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 86 predicate places. [2023-11-06 21:54:02,167 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 111 transitions, 1114 flow [2023-11-06 21:54:02,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 77.8) internal successors, (1945), 25 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:02,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:02,168 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:02,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:02,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:02,378 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 21:54:02,379 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:02,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1069919105, now seen corresponding path program 11 times [2023-11-06 21:54:02,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:02,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252696439] [2023-11-06 21:54:02,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:02,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:02,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:02,686 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 21:54:02,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:02,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252696439] [2023-11-06 21:54:02,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252696439] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:54:02,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703943160] [2023-11-06 21:54:02,687 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 21:54:02,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:02,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:02,688 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:02,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 21:54:02,781 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:54:02,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:54:02,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 21:54:02,783 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:03,023 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 21:54:03,023 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:03,549 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 21:54:03,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703943160] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:03,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:54:03,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-06 21:54:03,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943324045] [2023-11-06 21:54:03,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:03,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 21:54:03,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:03,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 21:54:03,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2023-11-06 21:54:03,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 196 [2023-11-06 21:54:03,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 111 transitions, 1114 flow. Second operand has 25 states, 25 states have (on average 77.84) internal successors, (1946), 25 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:03,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:03,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 196 [2023-11-06 21:54:03,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:05,407 INFO L124 PetriNetUnfolderBase]: 318/644 cut-off events. [2023-11-06 21:54:05,407 INFO L125 PetriNetUnfolderBase]: For 3520/3520 co-relation queries the response was YES. [2023-11-06 21:54:05,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3557 conditions, 644 events. 318/644 cut-off events. For 3520/3520 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3192 event pairs, 12 based on Foata normal form. 3/647 useless extension candidates. Maximal degree in co-relation 3527. Up to 237 conditions per place. [2023-11-06 21:54:05,416 INFO L140 encePairwiseOnDemand]: 188/196 looper letters, 99 selfloop transitions, 84 changer transitions 20/203 dead transitions. [2023-11-06 21:54:05,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 203 transitions, 1975 flow [2023-11-06 21:54:05,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-06 21:54:05,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-06 21:54:05,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2356 transitions. [2023-11-06 21:54:05,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.414496833216045 [2023-11-06 21:54:05,422 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2356 transitions. [2023-11-06 21:54:05,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2356 transitions. [2023-11-06 21:54:05,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:05,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2356 transitions. [2023-11-06 21:54:05,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 81.24137931034483) internal successors, (2356), 29 states have internal predecessors, (2356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:05,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 196.0) internal successors, (5880), 30 states have internal predecessors, (5880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:05,438 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 196.0) internal successors, (5880), 30 states have internal predecessors, (5880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:05,439 INFO L175 Difference]: Start difference. First operand has 115 places, 111 transitions, 1114 flow. Second operand 29 states and 2356 transitions. [2023-11-06 21:54:05,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 203 transitions, 1975 flow [2023-11-06 21:54:05,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 203 transitions, 1538 flow, removed 168 selfloop flow, removed 14 redundant places. [2023-11-06 21:54:05,468 INFO L231 Difference]: Finished difference. Result has 133 places, 118 transitions, 1021 flow [2023-11-06 21:54:05,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=755, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1021, PETRI_PLACES=133, PETRI_TRANSITIONS=118} [2023-11-06 21:54:05,469 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 104 predicate places. [2023-11-06 21:54:05,469 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 118 transitions, 1021 flow [2023-11-06 21:54:05,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 77.84) internal successors, (1946), 25 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:05,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:05,470 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:05,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:05,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 21:54:05,676 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 21:54:05,676 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:05,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1214941145, now seen corresponding path program 12 times [2023-11-06 21:54:05,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:05,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363191515] [2023-11-06 21:54:05,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:05,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:05,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:05,923 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 21:54:05,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:05,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363191515] [2023-11-06 21:54:05,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363191515] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:54:05,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552409557] [2023-11-06 21:54:05,924 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 21:54:05,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:05,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:05,925 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:05,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 21:54:06,014 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-06 21:54:06,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:54:06,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 21:54:06,018 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:06,263 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 21:54:06,263 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:06,714 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 21:54:06,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552409557] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:06,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:54:06,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-06 21:54:06,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930558523] [2023-11-06 21:54:06,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:06,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 21:54:06,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:06,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 21:54:06,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2023-11-06 21:54:07,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 196 [2023-11-06 21:54:07,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 118 transitions, 1021 flow. Second operand has 25 states, 25 states have (on average 77.76) internal successors, (1944), 25 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:07,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:07,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 196 [2023-11-06 21:54:07,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:09,011 INFO L124 PetriNetUnfolderBase]: 384/793 cut-off events. [2023-11-06 21:54:09,012 INFO L125 PetriNetUnfolderBase]: For 5926/5926 co-relation queries the response was YES. [2023-11-06 21:54:09,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4098 conditions, 793 events. 384/793 cut-off events. For 5926/5926 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4291 event pairs, 20 based on Foata normal form. 4/797 useless extension candidates. Maximal degree in co-relation 4067. Up to 277 conditions per place. [2023-11-06 21:54:09,022 INFO L140 encePairwiseOnDemand]: 188/196 looper letters, 120 selfloop transitions, 102 changer transitions 27/249 dead transitions. [2023-11-06 21:54:09,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 249 transitions, 2250 flow [2023-11-06 21:54:09,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-06 21:54:09,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-06 21:54:09,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2927 transitions. [2023-11-06 21:54:09,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41482426303854875 [2023-11-06 21:54:09,029 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2927 transitions. [2023-11-06 21:54:09,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2927 transitions. [2023-11-06 21:54:09,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:09,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2927 transitions. [2023-11-06 21:54:09,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 81.30555555555556) internal successors, (2927), 36 states have internal predecessors, (2927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:09,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 196.0) internal successors, (7252), 37 states have internal predecessors, (7252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:09,071 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 196.0) internal successors, (7252), 37 states have internal predecessors, (7252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:09,072 INFO L175 Difference]: Start difference. First operand has 133 places, 118 transitions, 1021 flow. Second operand 36 states and 2927 transitions. [2023-11-06 21:54:09,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 249 transitions, 2250 flow [2023-11-06 21:54:09,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 249 transitions, 2018 flow, removed 48 selfloop flow, removed 21 redundant places. [2023-11-06 21:54:09,102 INFO L231 Difference]: Finished difference. Result has 153 places, 136 transitions, 1292 flow [2023-11-06 21:54:09,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=846, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1292, PETRI_PLACES=153, PETRI_TRANSITIONS=136} [2023-11-06 21:54:09,103 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 124 predicate places. [2023-11-06 21:54:09,103 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 136 transitions, 1292 flow [2023-11-06 21:54:09,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 77.76) internal successors, (1944), 25 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:09,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:09,104 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:09,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:09,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:09,310 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 21:54:09,311 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:09,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1242646775, now seen corresponding path program 13 times [2023-11-06 21:54:09,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:09,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960106622] [2023-11-06 21:54:09,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:09,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:09,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:09,561 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 21:54:09,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:09,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960106622] [2023-11-06 21:54:09,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960106622] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:54:09,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646846180] [2023-11-06 21:54:09,562 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 21:54:09,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:09,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:09,573 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:09,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 21:54:09,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:09,653 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 21:54:09,654 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:09,902 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 21:54:09,902 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:10,329 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 21:54:10,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646846180] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:10,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:54:10,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-06 21:54:10,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900204018] [2023-11-06 21:54:10,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:10,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 21:54:10,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:10,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 21:54:10,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2023-11-06 21:54:10,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 196 [2023-11-06 21:54:10,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 136 transitions, 1292 flow. Second operand has 25 states, 25 states have (on average 77.76) internal successors, (1944), 25 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:10,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:10,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 196 [2023-11-06 21:54:10,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:12,225 INFO L124 PetriNetUnfolderBase]: 367/760 cut-off events. [2023-11-06 21:54:12,225 INFO L125 PetriNetUnfolderBase]: For 8262/8262 co-relation queries the response was YES. [2023-11-06 21:54:12,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4190 conditions, 760 events. 367/760 cut-off events. For 8262/8262 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 4048 event pairs, 18 based on Foata normal form. 2/762 useless extension candidates. Maximal degree in co-relation 4154. Up to 347 conditions per place. [2023-11-06 21:54:12,235 INFO L140 encePairwiseOnDemand]: 188/196 looper letters, 110 selfloop transitions, 98 changer transitions 21/229 dead transitions. [2023-11-06 21:54:12,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 229 transitions, 2163 flow [2023-11-06 21:54:12,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-06 21:54:12,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-06 21:54:12,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2519 transitions. [2023-11-06 21:54:12,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41458196181698487 [2023-11-06 21:54:12,241 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2519 transitions. [2023-11-06 21:54:12,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2519 transitions. [2023-11-06 21:54:12,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:12,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2519 transitions. [2023-11-06 21:54:12,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 81.25806451612904) internal successors, (2519), 31 states have internal predecessors, (2519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:12,256 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 196.0) internal successors, (6272), 32 states have internal predecessors, (6272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:12,258 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 196.0) internal successors, (6272), 32 states have internal predecessors, (6272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:12,259 INFO L175 Difference]: Start difference. First operand has 153 places, 136 transitions, 1292 flow. Second operand 31 states and 2519 transitions. [2023-11-06 21:54:12,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 229 transitions, 2163 flow [2023-11-06 21:54:12,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 229 transitions, 1955 flow, removed 58 selfloop flow, removed 21 redundant places. [2023-11-06 21:54:12,301 INFO L231 Difference]: Finished difference. Result has 160 places, 138 transitions, 1401 flow [2023-11-06 21:54:12,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=1108, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1401, PETRI_PLACES=160, PETRI_TRANSITIONS=138} [2023-11-06 21:54:12,302 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 131 predicate places. [2023-11-06 21:54:12,302 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 138 transitions, 1401 flow [2023-11-06 21:54:12,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 77.76) internal successors, (1944), 25 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:12,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:12,303 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:12,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:12,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:12,508 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 21:54:12,509 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:12,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1623261409, now seen corresponding path program 14 times [2023-11-06 21:54:12,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:12,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833858883] [2023-11-06 21:54:12,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:12,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:12,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:12,753 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 21:54:12,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:12,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833858883] [2023-11-06 21:54:12,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833858883] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:54:12,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76736581] [2023-11-06 21:54:12,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:54:12,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:12,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:12,757 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:12,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 21:54:12,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:54:12,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:54:12,847 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 21:54:12,849 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:13,098 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 21:54:13,098 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:13,592 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 21:54:13,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76736581] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:13,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:54:13,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-06 21:54:13,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962385952] [2023-11-06 21:54:13,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:13,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 21:54:13,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:13,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 21:54:13,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2023-11-06 21:54:13,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 196 [2023-11-06 21:54:13,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 138 transitions, 1401 flow. Second operand has 25 states, 25 states have (on average 77.84) internal successors, (1946), 25 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:13,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:13,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 196 [2023-11-06 21:54:13,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:15,352 INFO L124 PetriNetUnfolderBase]: 441/912 cut-off events. [2023-11-06 21:54:15,353 INFO L125 PetriNetUnfolderBase]: For 12203/12203 co-relation queries the response was YES. [2023-11-06 21:54:15,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5407 conditions, 912 events. 441/912 cut-off events. For 12203/12203 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 5079 event pairs, 68 based on Foata normal form. 3/915 useless extension candidates. Maximal degree in co-relation 5370. Up to 530 conditions per place. [2023-11-06 21:54:15,367 INFO L140 encePairwiseOnDemand]: 188/196 looper letters, 137 selfloop transitions, 85 changer transitions 20/242 dead transitions. [2023-11-06 21:54:15,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 242 transitions, 2535 flow [2023-11-06 21:54:15,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-06 21:54:15,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-06 21:54:15,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2508 transitions. [2023-11-06 21:54:15,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.412771560236998 [2023-11-06 21:54:15,372 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2508 transitions. [2023-11-06 21:54:15,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2508 transitions. [2023-11-06 21:54:15,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:15,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2508 transitions. [2023-11-06 21:54:15,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 80.90322580645162) internal successors, (2508), 31 states have internal predecessors, (2508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:15,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 196.0) internal successors, (6272), 32 states have internal predecessors, (6272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:15,387 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 196.0) internal successors, (6272), 32 states have internal predecessors, (6272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:15,387 INFO L175 Difference]: Start difference. First operand has 160 places, 138 transitions, 1401 flow. Second operand 31 states and 2508 transitions. [2023-11-06 21:54:15,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 242 transitions, 2535 flow [2023-11-06 21:54:15,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 242 transitions, 2207 flow, removed 63 selfloop flow, removed 23 redundant places. [2023-11-06 21:54:15,451 INFO L231 Difference]: Finished difference. Result has 173 places, 156 transitions, 1536 flow [2023-11-06 21:54:15,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=1140, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1536, PETRI_PLACES=173, PETRI_TRANSITIONS=156} [2023-11-06 21:54:15,452 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 144 predicate places. [2023-11-06 21:54:15,452 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 156 transitions, 1536 flow [2023-11-06 21:54:15,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 77.84) internal successors, (1946), 25 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:15,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:15,453 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:15,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:15,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:15,659 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 21:54:15,660 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:15,660 INFO L85 PathProgramCache]: Analyzing trace with hash -578700315, now seen corresponding path program 15 times [2023-11-06 21:54:15,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:15,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051188904] [2023-11-06 21:54:15,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:15,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:15,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:15,927 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 21:54:15,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:15,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051188904] [2023-11-06 21:54:15,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051188904] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:54:15,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974156020] [2023-11-06 21:54:15,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:54:15,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:15,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:15,929 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:15,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 21:54:16,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 21:54:16,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:54:16,009 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 21:54:16,011 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:16,242 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 21:54:16,242 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:16,661 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 21:54:16,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974156020] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:16,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:54:16,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-06 21:54:16,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007841790] [2023-11-06 21:54:16,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:16,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 21:54:16,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:16,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 21:54:16,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2023-11-06 21:54:16,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 196 [2023-11-06 21:54:16,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 156 transitions, 1536 flow. Second operand has 25 states, 25 states have (on average 77.76) internal successors, (1944), 25 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:16,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:16,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 196 [2023-11-06 21:54:16,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:18,300 INFO L124 PetriNetUnfolderBase]: 561/1179 cut-off events. [2023-11-06 21:54:18,301 INFO L125 PetriNetUnfolderBase]: For 23372/23372 co-relation queries the response was YES. [2023-11-06 21:54:18,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7387 conditions, 1179 events. 561/1179 cut-off events. For 23372/23372 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 7189 event pairs, 76 based on Foata normal form. 6/1177 useless extension candidates. Maximal degree in co-relation 7341. Up to 568 conditions per place. [2023-11-06 21:54:18,319 INFO L140 encePairwiseOnDemand]: 188/196 looper letters, 157 selfloop transitions, 141 changer transitions 18/316 dead transitions. [2023-11-06 21:54:18,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 316 transitions, 3413 flow [2023-11-06 21:54:18,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-06 21:54:18,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-11-06 21:54:18,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 3152 transitions. [2023-11-06 21:54:18,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4123495552066981 [2023-11-06 21:54:18,325 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 3152 transitions. [2023-11-06 21:54:18,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 3152 transitions. [2023-11-06 21:54:18,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:18,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 3152 transitions. [2023-11-06 21:54:18,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 80.82051282051282) internal successors, (3152), 39 states have internal predecessors, (3152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:18,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 196.0) internal successors, (7840), 40 states have internal predecessors, (7840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:18,341 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 196.0) internal successors, (7840), 40 states have internal predecessors, (7840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:18,341 INFO L175 Difference]: Start difference. First operand has 173 places, 156 transitions, 1536 flow. Second operand 39 states and 3152 transitions. [2023-11-06 21:54:18,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 316 transitions, 3413 flow [2023-11-06 21:54:18,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 316 transitions, 3189 flow, removed 60 selfloop flow, removed 19 redundant places. [2023-11-06 21:54:18,411 INFO L231 Difference]: Finished difference. Result has 205 places, 213 transitions, 2711 flow [2023-11-06 21:54:18,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=1406, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=2711, PETRI_PLACES=205, PETRI_TRANSITIONS=213} [2023-11-06 21:54:18,411 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 176 predicate places. [2023-11-06 21:54:18,411 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 213 transitions, 2711 flow [2023-11-06 21:54:18,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 77.76) internal successors, (1944), 25 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:18,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:18,412 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:18,420 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-06 21:54:18,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:18,612 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 21:54:18,613 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:18,613 INFO L85 PathProgramCache]: Analyzing trace with hash -611883645, now seen corresponding path program 16 times [2023-11-06 21:54:18,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:18,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418339190] [2023-11-06 21:54:18,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:18,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:18,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:18,853 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 21:54:18,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:18,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418339190] [2023-11-06 21:54:18,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418339190] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:54:18,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969221086] [2023-11-06 21:54:18,854 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 21:54:18,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:18,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:18,855 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:18,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 21:54:18,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 21:54:18,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:54:18,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 21:54:18,950 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:19,185 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 21:54:19,186 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:19,579 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 21:54:19,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969221086] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:19,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:54:19,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-06 21:54:19,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52698599] [2023-11-06 21:54:19,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:19,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 21:54:19,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:19,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 21:54:19,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2023-11-06 21:54:19,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 196 [2023-11-06 21:54:19,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 213 transitions, 2711 flow. Second operand has 25 states, 25 states have (on average 77.84) internal successors, (1946), 25 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:19,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:19,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 196 [2023-11-06 21:54:19,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:21,997 INFO L124 PetriNetUnfolderBase]: 589/1209 cut-off events. [2023-11-06 21:54:21,997 INFO L125 PetriNetUnfolderBase]: For 25527/25527 co-relation queries the response was YES. [2023-11-06 21:54:22,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8464 conditions, 1209 events. 589/1209 cut-off events. For 25527/25527 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 7296 event pairs, 76 based on Foata normal form. 8/1217 useless extension candidates. Maximal degree in co-relation 8404. Up to 566 conditions per place. [2023-11-06 21:54:22,013 INFO L140 encePairwiseOnDemand]: 188/196 looper letters, 169 selfloop transitions, 143 changer transitions 36/348 dead transitions. [2023-11-06 21:54:22,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 348 transitions, 4279 flow [2023-11-06 21:54:22,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-06 21:54:22,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-11-06 21:54:22,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 3951 transitions. [2023-11-06 21:54:22,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41139108704706373 [2023-11-06 21:54:22,029 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 3951 transitions. [2023-11-06 21:54:22,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 3951 transitions. [2023-11-06 21:54:22,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:22,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 3951 transitions. [2023-11-06 21:54:22,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 80.63265306122449) internal successors, (3951), 49 states have internal predecessors, (3951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:22,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 196.0) internal successors, (9800), 50 states have internal predecessors, (9800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:22,048 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 196.0) internal successors, (9800), 50 states have internal predecessors, (9800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:22,049 INFO L175 Difference]: Start difference. First operand has 205 places, 213 transitions, 2711 flow. Second operand 49 states and 3951 transitions. [2023-11-06 21:54:22,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 348 transitions, 4279 flow [2023-11-06 21:54:22,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 348 transitions, 3506 flow, removed 335 selfloop flow, removed 17 redundant places. [2023-11-06 21:54:22,184 INFO L231 Difference]: Finished difference. Result has 247 places, 226 transitions, 2683 flow [2023-11-06 21:54:22,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=2130, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=2683, PETRI_PLACES=247, PETRI_TRANSITIONS=226} [2023-11-06 21:54:22,185 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 218 predicate places. [2023-11-06 21:54:22,185 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 226 transitions, 2683 flow [2023-11-06 21:54:22,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 77.84) internal successors, (1946), 25 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:22,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:22,186 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:22,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:22,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:22,386 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 21:54:22,387 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:22,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1998517921, now seen corresponding path program 17 times [2023-11-06 21:54:22,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:22,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111262035] [2023-11-06 21:54:22,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:22,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:22,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:22,603 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 21:54:22,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:22,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111262035] [2023-11-06 21:54:22,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111262035] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:54:22,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463798230] [2023-11-06 21:54:22,604 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 21:54:22,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:22,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:22,605 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:22,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 21:54:22,695 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 21:54:22,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:54:22,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-06 21:54:22,698 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:22,879 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 21:54:22,879 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:23,061 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 21:54:23,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463798230] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:23,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:54:23,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-11-06 21:54:23,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121946986] [2023-11-06 21:54:23,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:23,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 21:54:23,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:23,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 21:54:23,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2023-11-06 21:54:23,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 196 [2023-11-06 21:54:23,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 226 transitions, 2683 flow. Second operand has 24 states, 24 states have (on average 77.83333333333333) internal successors, (1868), 24 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:23,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:23,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 196 [2023-11-06 21:54:23,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:24,259 INFO L124 PetriNetUnfolderBase]: 667/1308 cut-off events. [2023-11-06 21:54:24,259 INFO L125 PetriNetUnfolderBase]: For 18556/18556 co-relation queries the response was YES. [2023-11-06 21:54:24,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8523 conditions, 1308 events. 667/1308 cut-off events. For 18556/18556 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 7661 event pairs, 72 based on Foata normal form. 10/1318 useless extension candidates. Maximal degree in co-relation 8453. Up to 695 conditions per place. [2023-11-06 21:54:24,272 INFO L140 encePairwiseOnDemand]: 188/196 looper letters, 138 selfloop transitions, 122 changer transitions 87/347 dead transitions. [2023-11-06 21:54:24,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 347 transitions, 4597 flow [2023-11-06 21:54:24,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-06 21:54:24,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-06 21:54:24,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2488 transitions. [2023-11-06 21:54:24,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40947992100065833 [2023-11-06 21:54:24,277 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2488 transitions. [2023-11-06 21:54:24,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2488 transitions. [2023-11-06 21:54:24,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:24,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2488 transitions. [2023-11-06 21:54:24,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 80.25806451612904) internal successors, (2488), 31 states have internal predecessors, (2488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:24,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 196.0) internal successors, (6272), 32 states have internal predecessors, (6272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:24,289 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 196.0) internal successors, (6272), 32 states have internal predecessors, (6272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:24,289 INFO L175 Difference]: Start difference. First operand has 247 places, 226 transitions, 2683 flow. Second operand 31 states and 2488 transitions. [2023-11-06 21:54:24,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 347 transitions, 4597 flow [2023-11-06 21:54:24,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 347 transitions, 4024 flow, removed 149 selfloop flow, removed 33 redundant places. [2023-11-06 21:54:24,385 INFO L231 Difference]: Finished difference. Result has 242 places, 216 transitions, 2756 flow [2023-11-06 21:54:24,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=2264, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2756, PETRI_PLACES=242, PETRI_TRANSITIONS=216} [2023-11-06 21:54:24,386 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 213 predicate places. [2023-11-06 21:54:24,386 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 216 transitions, 2756 flow [2023-11-06 21:54:24,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 77.83333333333333) internal successors, (1868), 24 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:24,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:24,387 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:24,395 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-06 21:54:24,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:24,587 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 21:54:24,588 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:24,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1610178917, now seen corresponding path program 18 times [2023-11-06 21:54:24,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:24,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310124695] [2023-11-06 21:54:24,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:24,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:24,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:24,835 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 21:54:24,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:24,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310124695] [2023-11-06 21:54:24,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310124695] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:54:24,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147842703] [2023-11-06 21:54:24,836 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 21:54:24,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:24,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:24,837 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:24,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 21:54:24,934 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-06 21:54:24,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:54:24,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 21:54:24,937 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:25,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:25,190 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:25,709 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 21:54:25,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147842703] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:25,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:54:25,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-06 21:54:25,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442993186] [2023-11-06 21:54:25,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:25,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 21:54:25,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:25,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 21:54:25,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2023-11-06 21:54:25,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 196 [2023-11-06 21:54:25,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 216 transitions, 2756 flow. Second operand has 25 states, 25 states have (on average 77.8) internal successors, (1945), 25 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:25,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:25,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 196 [2023-11-06 21:54:25,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:27,265 INFO L124 PetriNetUnfolderBase]: 590/1153 cut-off events. [2023-11-06 21:54:27,265 INFO L125 PetriNetUnfolderBase]: For 18816/18816 co-relation queries the response was YES. [2023-11-06 21:54:27,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7882 conditions, 1153 events. 590/1153 cut-off events. For 18816/18816 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 6492 event pairs, 86 based on Foata normal form. 3/1156 useless extension candidates. Maximal degree in co-relation 7811. Up to 920 conditions per place. [2023-11-06 21:54:27,277 INFO L140 encePairwiseOnDemand]: 188/196 looper letters, 224 selfloop transitions, 51 changer transitions 20/295 dead transitions. [2023-11-06 21:54:27,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 295 transitions, 3882 flow [2023-11-06 21:54:27,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-06 21:54:27,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-06 21:54:27,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2179 transitions. [2023-11-06 21:54:27,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4117535903250189 [2023-11-06 21:54:27,282 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2179 transitions. [2023-11-06 21:54:27,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2179 transitions. [2023-11-06 21:54:27,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:27,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2179 transitions. [2023-11-06 21:54:27,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 80.70370370370371) internal successors, (2179), 27 states have internal predecessors, (2179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:27,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 196.0) internal successors, (5488), 28 states have internal predecessors, (5488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:27,292 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 196.0) internal successors, (5488), 28 states have internal predecessors, (5488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:27,292 INFO L175 Difference]: Start difference. First operand has 242 places, 216 transitions, 2756 flow. Second operand 27 states and 2179 transitions. [2023-11-06 21:54:27,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 295 transitions, 3882 flow [2023-11-06 21:54:27,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 295 transitions, 3341 flow, removed 193 selfloop flow, removed 34 redundant places. [2023-11-06 21:54:27,421 INFO L231 Difference]: Finished difference. Result has 213 places, 224 transitions, 2528 flow [2023-11-06 21:54:27,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=2265, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2528, PETRI_PLACES=213, PETRI_TRANSITIONS=224} [2023-11-06 21:54:27,422 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 184 predicate places. [2023-11-06 21:54:27,422 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 224 transitions, 2528 flow [2023-11-06 21:54:27,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 77.8) internal successors, (1945), 25 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:27,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:27,422 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:27,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:27,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:27,623 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 21:54:27,623 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:27,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1179321599, now seen corresponding path program 19 times [2023-11-06 21:54:27,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:27,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687870691] [2023-11-06 21:54:27,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:27,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:27,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:27,851 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 21:54:27,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:27,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687870691] [2023-11-06 21:54:27,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687870691] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:54:27,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124374792] [2023-11-06 21:54:27,852 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 21:54:27,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:27,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:27,860 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:27,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 21:54:27,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:27,955 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 21:54:27,956 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:28,189 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 21:54:28,190 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:28,661 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 21:54:28,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124374792] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:28,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:54:28,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-06 21:54:28,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522054152] [2023-11-06 21:54:28,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:28,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 21:54:28,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:28,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 21:54:28,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2023-11-06 21:54:28,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 196 [2023-11-06 21:54:28,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 224 transitions, 2528 flow. Second operand has 25 states, 25 states have (on average 77.8) internal successors, (1945), 25 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:28,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:28,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 196 [2023-11-06 21:54:28,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:30,089 INFO L124 PetriNetUnfolderBase]: 592/1163 cut-off events. [2023-11-06 21:54:30,089 INFO L125 PetriNetUnfolderBase]: For 15641/15641 co-relation queries the response was YES. [2023-11-06 21:54:30,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7566 conditions, 1163 events. 592/1163 cut-off events. For 15641/15641 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 6602 event pairs, 92 based on Foata normal form. 3/1166 useless extension candidates. Maximal degree in co-relation 7498. Up to 913 conditions per place. [2023-11-06 21:54:30,100 INFO L140 encePairwiseOnDemand]: 187/196 looper letters, 220 selfloop transitions, 46 changer transitions 19/285 dead transitions. [2023-11-06 21:54:30,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 285 transitions, 3549 flow [2023-11-06 21:54:30,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 21:54:30,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-06 21:54:30,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1546 transitions. [2023-11-06 21:54:30,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41514500537056925 [2023-11-06 21:54:30,103 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1546 transitions. [2023-11-06 21:54:30,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1546 transitions. [2023-11-06 21:54:30,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:30,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1546 transitions. [2023-11-06 21:54:30,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 81.36842105263158) internal successors, (1546), 19 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:30,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 196.0) internal successors, (3920), 20 states have internal predecessors, (3920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:30,112 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 196.0) internal successors, (3920), 20 states have internal predecessors, (3920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:30,112 INFO L175 Difference]: Start difference. First operand has 213 places, 224 transitions, 2528 flow. Second operand 19 states and 1546 transitions. [2023-11-06 21:54:30,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 285 transitions, 3549 flow [2023-11-06 21:54:30,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 285 transitions, 3381 flow, removed 37 selfloop flow, removed 18 redundant places. [2023-11-06 21:54:30,220 INFO L231 Difference]: Finished difference. Result has 219 places, 227 transitions, 2583 flow [2023-11-06 21:54:30,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=2382, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2583, PETRI_PLACES=219, PETRI_TRANSITIONS=227} [2023-11-06 21:54:30,221 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 190 predicate places. [2023-11-06 21:54:30,221 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 227 transitions, 2583 flow [2023-11-06 21:54:30,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 77.8) internal successors, (1945), 25 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:30,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:30,222 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:30,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:30,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-06 21:54:30,423 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 21:54:30,423 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:30,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1547312951, now seen corresponding path program 20 times [2023-11-06 21:54:30,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:30,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152402751] [2023-11-06 21:54:30,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:30,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:30,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:30,653 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 21:54:30,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:30,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152402751] [2023-11-06 21:54:30,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152402751] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:54:30,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068286499] [2023-11-06 21:54:30,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:54:30,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:30,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:30,659 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:30,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-06 21:54:30,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:54:30,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:54:30,760 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 21:54:30,762 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:31,025 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 21:54:31,026 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:31,415 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 21:54:31,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068286499] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:31,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:54:31,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-06 21:54:31,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489241948] [2023-11-06 21:54:31,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:31,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 21:54:31,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:31,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 21:54:31,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2023-11-06 21:54:31,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 196 [2023-11-06 21:54:31,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 227 transitions, 2583 flow. Second operand has 25 states, 25 states have (on average 77.76) internal successors, (1944), 25 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:31,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:31,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 196 [2023-11-06 21:54:31,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:32,503 INFO L124 PetriNetUnfolderBase]: 592/1169 cut-off events. [2023-11-06 21:54:32,503 INFO L125 PetriNetUnfolderBase]: For 18151/18151 co-relation queries the response was YES. [2023-11-06 21:54:32,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7647 conditions, 1169 events. 592/1169 cut-off events. For 18151/18151 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 6656 event pairs, 96 based on Foata normal form. 3/1172 useless extension candidates. Maximal degree in co-relation 7573. Up to 972 conditions per place. [2023-11-06 21:54:32,519 INFO L140 encePairwiseOnDemand]: 188/196 looper letters, 203 selfloop transitions, 50 changer transitions 26/279 dead transitions. [2023-11-06 21:54:32,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 279 transitions, 3533 flow [2023-11-06 21:54:32,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 21:54:32,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-06 21:54:32,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1603 transitions. [2023-11-06 21:54:32,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4089285714285714 [2023-11-06 21:54:32,523 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1603 transitions. [2023-11-06 21:54:32,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1603 transitions. [2023-11-06 21:54:32,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:32,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1603 transitions. [2023-11-06 21:54:32,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 80.15) internal successors, (1603), 20 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:32,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 196.0) internal successors, (4116), 21 states have internal predecessors, (4116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:32,531 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 196.0) internal successors, (4116), 21 states have internal predecessors, (4116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:32,531 INFO L175 Difference]: Start difference. First operand has 219 places, 227 transitions, 2583 flow. Second operand 20 states and 1603 transitions. [2023-11-06 21:54:32,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 279 transitions, 3533 flow [2023-11-06 21:54:32,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 279 transitions, 3313 flow, removed 39 selfloop flow, removed 17 redundant places. [2023-11-06 21:54:32,656 INFO L231 Difference]: Finished difference. Result has 225 places, 231 transitions, 2637 flow [2023-11-06 21:54:32,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=2373, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2637, PETRI_PLACES=225, PETRI_TRANSITIONS=231} [2023-11-06 21:54:32,657 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 196 predicate places. [2023-11-06 21:54:32,657 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 231 transitions, 2637 flow [2023-11-06 21:54:32,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 77.76) internal successors, (1944), 25 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:32,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:32,658 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:32,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:32,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-06 21:54:32,861 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 21:54:32,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:32,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1063088615, now seen corresponding path program 21 times [2023-11-06 21:54:32,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:32,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802873581] [2023-11-06 21:54:32,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:32,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:32,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:33,079 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 21:54:33,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:33,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802873581] [2023-11-06 21:54:33,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802873581] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:54:33,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112859018] [2023-11-06 21:54:33,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:54:33,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:33,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:33,082 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:33,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-06 21:54:33,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 21:54:33,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:54:33,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 21:54:33,196 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:33,507 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 21:54:33,507 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:33,900 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 21:54:33,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112859018] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:33,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:54:33,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-06 21:54:33,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935595211] [2023-11-06 21:54:33,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:33,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 21:54:33,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:33,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 21:54:33,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2023-11-06 21:54:34,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 196 [2023-11-06 21:54:34,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 231 transitions, 2637 flow. Second operand has 25 states, 25 states have (on average 77.84) internal successors, (1946), 25 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:34,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:34,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 196 [2023-11-06 21:54:34,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:35,508 INFO L124 PetriNetUnfolderBase]: 655/1310 cut-off events. [2023-11-06 21:54:35,508 INFO L125 PetriNetUnfolderBase]: For 27469/27469 co-relation queries the response was YES. [2023-11-06 21:54:35,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9255 conditions, 1310 events. 655/1310 cut-off events. For 27469/27469 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 7775 event pairs, 100 based on Foata normal form. 5/1315 useless extension candidates. Maximal degree in co-relation 9179. Up to 948 conditions per place. [2023-11-06 21:54:35,523 INFO L140 encePairwiseOnDemand]: 187/196 looper letters, 227 selfloop transitions, 79 changer transitions 30/336 dead transitions. [2023-11-06 21:54:35,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 336 transitions, 4508 flow [2023-11-06 21:54:35,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-06 21:54:35,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-06 21:54:35,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2504 transitions. [2023-11-06 21:54:35,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121132323897301 [2023-11-06 21:54:35,527 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2504 transitions. [2023-11-06 21:54:35,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2504 transitions. [2023-11-06 21:54:35,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:35,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2504 transitions. [2023-11-06 21:54:35,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 80.7741935483871) internal successors, (2504), 31 states have internal predecessors, (2504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:35,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 196.0) internal successors, (6272), 32 states have internal predecessors, (6272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:35,539 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 196.0) internal successors, (6272), 32 states have internal predecessors, (6272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:35,539 INFO L175 Difference]: Start difference. First operand has 225 places, 231 transitions, 2637 flow. Second operand 31 states and 2504 transitions. [2023-11-06 21:54:35,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 336 transitions, 4508 flow [2023-11-06 21:54:35,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 336 transitions, 4168 flow, removed 142 selfloop flow, removed 15 redundant places. [2023-11-06 21:54:35,691 INFO L231 Difference]: Finished difference. Result has 241 places, 256 transitions, 3193 flow [2023-11-06 21:54:35,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=2455, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=3193, PETRI_PLACES=241, PETRI_TRANSITIONS=256} [2023-11-06 21:54:35,692 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 212 predicate places. [2023-11-06 21:54:35,692 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 256 transitions, 3193 flow [2023-11-06 21:54:35,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 77.84) internal successors, (1946), 25 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:35,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:35,693 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:35,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:35,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-06 21:54:35,898 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 21:54:35,899 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:35,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1029905285, now seen corresponding path program 22 times [2023-11-06 21:54:35,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:35,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894775610] [2023-11-06 21:54:35,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:35,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:35,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:36,143 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 21:54:36,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:36,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894775610] [2023-11-06 21:54:36,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894775610] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:54:36,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658524074] [2023-11-06 21:54:36,144 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 21:54:36,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:36,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:36,145 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:36,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-06 21:54:36,239 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 21:54:36,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:54:36,241 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-06 21:54:36,242 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:36,477 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 21:54:36,478 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:36,744 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 21:54:36,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658524074] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:36,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:54:36,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-11-06 21:54:36,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467671865] [2023-11-06 21:54:36,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:36,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 21:54:36,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:36,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 21:54:36,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2023-11-06 21:54:37,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 196 [2023-11-06 21:54:37,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 256 transitions, 3193 flow. Second operand has 25 states, 25 states have (on average 77.76) internal successors, (1944), 25 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:37,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:37,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 196 [2023-11-06 21:54:37,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:38,567 INFO L124 PetriNetUnfolderBase]: 659/1364 cut-off events. [2023-11-06 21:54:38,567 INFO L125 PetriNetUnfolderBase]: For 35842/35842 co-relation queries the response was YES. [2023-11-06 21:54:38,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10000 conditions, 1364 events. 659/1364 cut-off events. For 35842/35842 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 8417 event pairs, 63 based on Foata normal form. 5/1369 useless extension candidates. Maximal degree in co-relation 9920. Up to 785 conditions per place. [2023-11-06 21:54:38,581 INFO L140 encePairwiseOnDemand]: 188/196 looper letters, 232 selfloop transitions, 97 changer transitions 26/355 dead transitions. [2023-11-06 21:54:38,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 355 transitions, 4838 flow [2023-11-06 21:54:38,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-06 21:54:38,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-06 21:54:38,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2501 transitions. [2023-11-06 21:54:38,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41161948650427915 [2023-11-06 21:54:38,587 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2501 transitions. [2023-11-06 21:54:38,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2501 transitions. [2023-11-06 21:54:38,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:38,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2501 transitions. [2023-11-06 21:54:38,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 80.6774193548387) internal successors, (2501), 31 states have internal predecessors, (2501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:38,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 196.0) internal successors, (6272), 32 states have internal predecessors, (6272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:38,598 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 196.0) internal successors, (6272), 32 states have internal predecessors, (6272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:38,598 INFO L175 Difference]: Start difference. First operand has 241 places, 256 transitions, 3193 flow. Second operand 31 states and 2501 transitions. [2023-11-06 21:54:38,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 355 transitions, 4838 flow [2023-11-06 21:54:38,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 355 transitions, 4187 flow, removed 293 selfloop flow, removed 11 redundant places. [2023-11-06 21:54:38,851 INFO L231 Difference]: Finished difference. Result has 257 places, 267 transitions, 3360 flow [2023-11-06 21:54:38,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=2699, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=3360, PETRI_PLACES=257, PETRI_TRANSITIONS=267} [2023-11-06 21:54:38,854 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 228 predicate places. [2023-11-06 21:54:38,855 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 267 transitions, 3360 flow [2023-11-06 21:54:38,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 77.76) internal successors, (1944), 25 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:38,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:38,856 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:38,865 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-06 21:54:39,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-06 21:54:39,061 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 21:54:39,061 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:39,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1997842579, now seen corresponding path program 23 times [2023-11-06 21:54:39,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:39,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816387403] [2023-11-06 21:54:39,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:39,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:39,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:39,272 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:39,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:39,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816387403] [2023-11-06 21:54:39,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816387403] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:54:39,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936424396] [2023-11-06 21:54:39,273 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 21:54:39,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:39,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:39,275 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:39,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-06 21:54:39,370 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:54:39,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:54:39,371 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 21:54:39,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:39,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:39,533 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:39,774 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:39,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936424396] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:39,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:54:39,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-06 21:54:39,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734485296] [2023-11-06 21:54:39,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:39,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 21:54:39,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:39,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 21:54:39,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2023-11-06 21:54:40,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 196 [2023-11-06 21:54:40,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 267 transitions, 3360 flow. Second operand has 26 states, 26 states have (on average 77.65384615384616) internal successors, (2019), 26 states have internal predecessors, (2019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:40,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:40,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 196 [2023-11-06 21:54:40,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:41,116 INFO L124 PetriNetUnfolderBase]: 692/1402 cut-off events. [2023-11-06 21:54:41,117 INFO L125 PetriNetUnfolderBase]: For 39062/39062 co-relation queries the response was YES. [2023-11-06 21:54:41,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10395 conditions, 1402 events. 692/1402 cut-off events. For 39062/39062 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 8595 event pairs, 18 based on Foata normal form. 4/1406 useless extension candidates. Maximal degree in co-relation 10311. Up to 562 conditions per place. [2023-11-06 21:54:41,138 INFO L140 encePairwiseOnDemand]: 188/196 looper letters, 169 selfloop transitions, 141 changer transitions 48/358 dead transitions. [2023-11-06 21:54:41,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 358 transitions, 4970 flow [2023-11-06 21:54:41,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-06 21:54:41,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-06 21:54:41,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1796 transitions. [2023-11-06 21:54:41,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4165120593692022 [2023-11-06 21:54:41,142 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1796 transitions. [2023-11-06 21:54:41,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1796 transitions. [2023-11-06 21:54:41,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:41,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1796 transitions. [2023-11-06 21:54:41,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 81.63636363636364) internal successors, (1796), 22 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:41,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 196.0) internal successors, (4508), 23 states have internal predecessors, (4508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:41,151 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 196.0) internal successors, (4508), 23 states have internal predecessors, (4508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:41,151 INFO L175 Difference]: Start difference. First operand has 257 places, 267 transitions, 3360 flow. Second operand 22 states and 1796 transitions. [2023-11-06 21:54:41,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 358 transitions, 4970 flow [2023-11-06 21:54:41,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 358 transitions, 4274 flow, removed 269 selfloop flow, removed 21 redundant places. [2023-11-06 21:54:41,420 INFO L231 Difference]: Finished difference. Result has 259 places, 272 transitions, 3370 flow [2023-11-06 21:54:41,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=2782, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3370, PETRI_PLACES=259, PETRI_TRANSITIONS=272} [2023-11-06 21:54:41,422 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 230 predicate places. [2023-11-06 21:54:41,422 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 272 transitions, 3370 flow [2023-11-06 21:54:41,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 77.65384615384616) internal successors, (2019), 26 states have internal predecessors, (2019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:41,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:41,429 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:41,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:41,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:41,636 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 21:54:41,636 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:41,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1085600613, now seen corresponding path program 24 times [2023-11-06 21:54:41,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:41,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831479707] [2023-11-06 21:54:41,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:41,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:41,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:41,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:41,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:41,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831479707] [2023-11-06 21:54:41,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831479707] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:54:41,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088585928] [2023-11-06 21:54:41,891 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 21:54:41,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:41,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:41,893 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:41,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-06 21:54:41,991 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 21:54:41,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:54:41,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 21:54:41,994 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:42,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:42,189 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:42,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:42,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088585928] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:42,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:54:42,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-06 21:54:42,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851628031] [2023-11-06 21:54:42,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:42,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 21:54:42,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:42,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 21:54:42,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2023-11-06 21:54:42,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 196 [2023-11-06 21:54:42,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 272 transitions, 3370 flow. Second operand has 26 states, 26 states have (on average 77.57692307692308) internal successors, (2017), 26 states have internal predecessors, (2017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:42,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:42,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 196 [2023-11-06 21:54:42,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:44,011 INFO L124 PetriNetUnfolderBase]: 713/1447 cut-off events. [2023-11-06 21:54:44,012 INFO L125 PetriNetUnfolderBase]: For 40496/40496 co-relation queries the response was YES. [2023-11-06 21:54:44,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10938 conditions, 1447 events. 713/1447 cut-off events. For 40496/40496 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 8938 event pairs, 18 based on Foata normal form. 2/1449 useless extension candidates. Maximal degree in co-relation 10852. Up to 530 conditions per place. [2023-11-06 21:54:44,025 INFO L140 encePairwiseOnDemand]: 188/196 looper letters, 197 selfloop transitions, 168 changer transitions 18/383 dead transitions. [2023-11-06 21:54:44,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 383 transitions, 5251 flow [2023-11-06 21:54:44,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-06 21:54:44,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-06 21:54:44,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2431 transitions. [2023-11-06 21:54:44,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41343537414965986 [2023-11-06 21:54:44,030 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2431 transitions. [2023-11-06 21:54:44,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2431 transitions. [2023-11-06 21:54:44,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:44,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2431 transitions. [2023-11-06 21:54:44,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 81.03333333333333) internal successors, (2431), 30 states have internal predecessors, (2431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:44,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 196.0) internal successors, (6076), 31 states have internal predecessors, (6076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:44,041 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 196.0) internal successors, (6076), 31 states have internal predecessors, (6076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:44,041 INFO L175 Difference]: Start difference. First operand has 259 places, 272 transitions, 3370 flow. Second operand 30 states and 2431 transitions. [2023-11-06 21:54:44,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 383 transitions, 5251 flow [2023-11-06 21:54:44,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 383 transitions, 4911 flow, removed 106 selfloop flow, removed 16 redundant places. [2023-11-06 21:54:44,313 INFO L231 Difference]: Finished difference. Result has 270 places, 290 transitions, 4045 flow [2023-11-06 21:54:44,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=3130, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=4045, PETRI_PLACES=270, PETRI_TRANSITIONS=290} [2023-11-06 21:54:44,313 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 241 predicate places. [2023-11-06 21:54:44,314 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 290 transitions, 4045 flow [2023-11-06 21:54:44,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 77.57692307692308) internal successors, (2017), 26 states have internal predecessors, (2017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:44,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:44,314 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:44,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:44,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-11-06 21:54:44,515 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 21:54:44,515 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:44,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1193019325, now seen corresponding path program 25 times [2023-11-06 21:54:44,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:44,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728680470] [2023-11-06 21:54:44,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:44,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:44,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:44,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:44,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:44,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728680470] [2023-11-06 21:54:44,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728680470] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:54:44,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682837195] [2023-11-06 21:54:44,761 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 21:54:44,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:44,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:44,763 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:44,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-06 21:54:44,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:44,864 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 21:54:44,866 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:45,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:45,056 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:45,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:45,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682837195] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:45,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:54:45,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-06 21:54:45,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099665912] [2023-11-06 21:54:45,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:45,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 21:54:45,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:45,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 21:54:45,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2023-11-06 21:54:45,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 196 [2023-11-06 21:54:45,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 290 transitions, 4045 flow. Second operand has 26 states, 26 states have (on average 77.65384615384616) internal successors, (2019), 26 states have internal predecessors, (2019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:45,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:45,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 196 [2023-11-06 21:54:45,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:46,536 INFO L124 PetriNetUnfolderBase]: 728/1471 cut-off events. [2023-11-06 21:54:46,537 INFO L125 PetriNetUnfolderBase]: For 37704/37704 co-relation queries the response was YES. [2023-11-06 21:54:46,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11601 conditions, 1471 events. 728/1471 cut-off events. For 37704/37704 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 9097 event pairs, 30 based on Foata normal form. 4/1475 useless extension candidates. Maximal degree in co-relation 11514. Up to 620 conditions per place. [2023-11-06 21:54:46,554 INFO L140 encePairwiseOnDemand]: 188/196 looper letters, 182 selfloop transitions, 144 changer transitions 50/376 dead transitions. [2023-11-06 21:54:46,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 376 transitions, 5682 flow [2023-11-06 21:54:46,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-06 21:54:46,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-06 21:54:46,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2032 transitions. [2023-11-06 21:54:46,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146938775510204 [2023-11-06 21:54:46,558 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2032 transitions. [2023-11-06 21:54:46,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2032 transitions. [2023-11-06 21:54:46,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:46,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2032 transitions. [2023-11-06 21:54:46,562 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 81.28) internal successors, (2032), 25 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:46,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 196.0) internal successors, (5096), 26 states have internal predecessors, (5096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:46,567 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 196.0) internal successors, (5096), 26 states have internal predecessors, (5096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:46,567 INFO L175 Difference]: Start difference. First operand has 270 places, 290 transitions, 4045 flow. Second operand 25 states and 2032 transitions. [2023-11-06 21:54:46,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 376 transitions, 5682 flow [2023-11-06 21:54:46,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 376 transitions, 5066 flow, removed 231 selfloop flow, removed 20 redundant places. [2023-11-06 21:54:46,790 INFO L231 Difference]: Finished difference. Result has 279 places, 278 transitions, 3920 flow [2023-11-06 21:54:46,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=3649, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=3920, PETRI_PLACES=279, PETRI_TRANSITIONS=278} [2023-11-06 21:54:46,791 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 250 predicate places. [2023-11-06 21:54:46,791 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 278 transitions, 3920 flow [2023-11-06 21:54:46,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 77.65384615384616) internal successors, (2019), 26 states have internal predecessors, (2019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:46,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:46,792 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:46,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:46,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-11-06 21:54:46,996 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 21:54:46,996 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:46,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1113306243, now seen corresponding path program 26 times [2023-11-06 21:54:46,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:46,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724669730] [2023-11-06 21:54:46,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:46,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:47,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:47,251 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:47,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:47,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724669730] [2023-11-06 21:54:47,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724669730] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:54:47,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567363752] [2023-11-06 21:54:47,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:54:47,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:47,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:47,258 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:47,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-06 21:54:47,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:54:47,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:54:47,357 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 21:54:47,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:47,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:47,558 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:47,817 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:47,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567363752] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:47,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:54:47,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-06 21:54:47,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271273054] [2023-11-06 21:54:47,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:47,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 21:54:47,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:47,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 21:54:47,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2023-11-06 21:54:48,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 196 [2023-11-06 21:54:48,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 278 transitions, 3920 flow. Second operand has 26 states, 26 states have (on average 77.57692307692308) internal successors, (2017), 26 states have internal predecessors, (2017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:48,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:48,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 196 [2023-11-06 21:54:48,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:49,175 INFO L124 PetriNetUnfolderBase]: 675/1371 cut-off events. [2023-11-06 21:54:49,175 INFO L125 PetriNetUnfolderBase]: For 28414/28414 co-relation queries the response was YES. [2023-11-06 21:54:49,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10364 conditions, 1371 events. 675/1371 cut-off events. For 28414/28414 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 8346 event pairs, 22 based on Foata normal form. 4/1375 useless extension candidates. Maximal degree in co-relation 10275. Up to 530 conditions per place. [2023-11-06 21:54:49,188 INFO L140 encePairwiseOnDemand]: 188/196 looper letters, 184 selfloop transitions, 157 changer transitions 20/361 dead transitions. [2023-11-06 21:54:49,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 361 transitions, 5271 flow [2023-11-06 21:54:49,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-06 21:54:49,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-06 21:54:49,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2118 transitions. [2023-11-06 21:54:49,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41562009419152274 [2023-11-06 21:54:49,192 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2118 transitions. [2023-11-06 21:54:49,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2118 transitions. [2023-11-06 21:54:49,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:49,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2118 transitions. [2023-11-06 21:54:49,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 81.46153846153847) internal successors, (2118), 26 states have internal predecessors, (2118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:49,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 196.0) internal successors, (5292), 27 states have internal predecessors, (5292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:49,197 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 196.0) internal successors, (5292), 27 states have internal predecessors, (5292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:49,197 INFO L175 Difference]: Start difference. First operand has 279 places, 278 transitions, 3920 flow. Second operand 26 states and 2118 transitions. [2023-11-06 21:54:49,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 361 transitions, 5271 flow [2023-11-06 21:54:49,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 361 transitions, 4719 flow, removed 81 selfloop flow, removed 26 redundant places. [2023-11-06 21:54:49,368 INFO L231 Difference]: Finished difference. Result has 266 places, 277 transitions, 3794 flow [2023-11-06 21:54:49,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=3439, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=3794, PETRI_PLACES=266, PETRI_TRANSITIONS=277} [2023-11-06 21:54:49,369 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 237 predicate places. [2023-11-06 21:54:49,369 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 277 transitions, 3794 flow [2023-11-06 21:54:49,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 77.57692307692308) internal successors, (2017), 26 states have internal predecessors, (2017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:49,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:49,370 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:49,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:49,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-11-06 21:54:49,572 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 21:54:49,572 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:49,572 INFO L85 PathProgramCache]: Analyzing trace with hash -896800803, now seen corresponding path program 27 times [2023-11-06 21:54:49,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:49,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404310632] [2023-11-06 21:54:49,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:49,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:49,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:49,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:49,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:49,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404310632] [2023-11-06 21:54:49,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404310632] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:54:49,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129702026] [2023-11-06 21:54:49,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:54:49,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:49,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:49,816 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:49,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-06 21:54:49,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 21:54:49,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:54:49,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 21:54:49,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:50,091 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:50,091 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:50,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:50,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129702026] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:50,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:54:50,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-06 21:54:50,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057109580] [2023-11-06 21:54:50,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:50,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 21:54:50,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:50,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 21:54:50,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2023-11-06 21:54:50,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 196 [2023-11-06 21:54:50,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 277 transitions, 3794 flow. Second operand has 26 states, 26 states have (on average 77.65384615384616) internal successors, (2019), 26 states have internal predecessors, (2019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:50,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:50,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 196 [2023-11-06 21:54:50,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:51,464 INFO L124 PetriNetUnfolderBase]: 672/1369 cut-off events. [2023-11-06 21:54:51,464 INFO L125 PetriNetUnfolderBase]: For 23394/23394 co-relation queries the response was YES. [2023-11-06 21:54:51,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9888 conditions, 1369 events. 672/1369 cut-off events. For 23394/23394 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 8368 event pairs, 19 based on Foata normal form. 5/1374 useless extension candidates. Maximal degree in co-relation 9804. Up to 530 conditions per place. [2023-11-06 21:54:51,479 INFO L140 encePairwiseOnDemand]: 188/196 looper letters, 170 selfloop transitions, 145 changer transitions 46/361 dead transitions. [2023-11-06 21:54:51,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 361 transitions, 5180 flow [2023-11-06 21:54:51,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 21:54:51,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-06 21:54:51,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1949 transitions. [2023-11-06 21:54:51,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.414328231292517 [2023-11-06 21:54:51,504 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1949 transitions. [2023-11-06 21:54:51,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1949 transitions. [2023-11-06 21:54:51,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:51,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1949 transitions. [2023-11-06 21:54:51,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 81.20833333333333) internal successors, (1949), 24 states have internal predecessors, (1949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:51,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 196.0) internal successors, (4900), 25 states have internal predecessors, (4900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:51,512 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 196.0) internal successors, (4900), 25 states have internal predecessors, (4900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:51,512 INFO L175 Difference]: Start difference. First operand has 266 places, 277 transitions, 3794 flow. Second operand 24 states and 1949 transitions. [2023-11-06 21:54:51,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 361 transitions, 5180 flow [2023-11-06 21:54:51,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 361 transitions, 4794 flow, removed 49 selfloop flow, removed 22 redundant places. [2023-11-06 21:54:51,650 INFO L231 Difference]: Finished difference. Result has 268 places, 268 transitions, 3670 flow [2023-11-06 21:54:51,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=3435, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3670, PETRI_PLACES=268, PETRI_TRANSITIONS=268} [2023-11-06 21:54:51,651 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 239 predicate places. [2023-11-06 21:54:51,651 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 268 transitions, 3670 flow [2023-11-06 21:54:51,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 77.65384615384616) internal successors, (2019), 26 states have internal predecessors, (2019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:51,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:51,652 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:51,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:51,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-11-06 21:54:51,852 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 21:54:51,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:51,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1059342853, now seen corresponding path program 28 times [2023-11-06 21:54:51,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:51,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601649509] [2023-11-06 21:54:51,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:51,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:51,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:52,094 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:52,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:52,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601649509] [2023-11-06 21:54:52,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601649509] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:54:52,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024678216] [2023-11-06 21:54:52,096 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 21:54:52,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:52,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:52,097 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:52,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-06 21:54:52,186 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 21:54:52,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:54:52,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 21:54:52,188 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:52,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:52,359 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:52,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:52,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024678216] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:52,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:54:52,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-06 21:54:52,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447395035] [2023-11-06 21:54:52,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:52,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 21:54:52,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:52,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 21:54:52,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2023-11-06 21:54:52,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 196 [2023-11-06 21:54:52,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 268 transitions, 3670 flow. Second operand has 26 states, 26 states have (on average 77.57692307692308) internal successors, (2017), 26 states have internal predecessors, (2017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:52,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:52,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 196 [2023-11-06 21:54:52,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:53,950 INFO L124 PetriNetUnfolderBase]: 704/1447 cut-off events. [2023-11-06 21:54:53,950 INFO L125 PetriNetUnfolderBase]: For 29191/29191 co-relation queries the response was YES. [2023-11-06 21:54:53,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10868 conditions, 1447 events. 704/1447 cut-off events. For 29191/29191 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 8988 event pairs, 60 based on Foata normal form. 2/1449 useless extension candidates. Maximal degree in co-relation 10781. Up to 590 conditions per place. [2023-11-06 21:54:53,967 INFO L140 encePairwiseOnDemand]: 188/196 looper letters, 220 selfloop transitions, 154 changer transitions 17/391 dead transitions. [2023-11-06 21:54:53,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 391 transitions, 5866 flow [2023-11-06 21:54:53,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-06 21:54:53,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-06 21:54:53,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2349 transitions. [2023-11-06 21:54:53,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.413265306122449 [2023-11-06 21:54:53,971 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2349 transitions. [2023-11-06 21:54:53,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2349 transitions. [2023-11-06 21:54:53,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:53,972 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2349 transitions. [2023-11-06 21:54:53,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 81.0) internal successors, (2349), 29 states have internal predecessors, (2349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:53,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 196.0) internal successors, (5880), 30 states have internal predecessors, (5880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:53,981 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 196.0) internal successors, (5880), 30 states have internal predecessors, (5880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:53,981 INFO L175 Difference]: Start difference. First operand has 268 places, 268 transitions, 3670 flow. Second operand 29 states and 2349 transitions. [2023-11-06 21:54:53,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 391 transitions, 5866 flow [2023-11-06 21:54:54,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 391 transitions, 5371 flow, removed 90 selfloop flow, removed 27 redundant places. [2023-11-06 21:54:54,184 INFO L231 Difference]: Finished difference. Result has 268 places, 297 transitions, 4423 flow [2023-11-06 21:54:54,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=3310, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=4423, PETRI_PLACES=268, PETRI_TRANSITIONS=297} [2023-11-06 21:54:54,184 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 239 predicate places. [2023-11-06 21:54:54,184 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 297 transitions, 4423 flow [2023-11-06 21:54:54,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 77.57692307692308) internal successors, (2017), 26 states have internal predecessors, (2017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:54,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:54,185 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:54,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:54,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-11-06 21:54:54,386 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 21:54:54,386 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:54,386 INFO L85 PathProgramCache]: Analyzing trace with hash 467694049, now seen corresponding path program 29 times [2023-11-06 21:54:54,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:54,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234188136] [2023-11-06 21:54:54,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:54,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:54,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:54,587 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:54,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:54,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234188136] [2023-11-06 21:54:54,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234188136] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:54:54,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823815295] [2023-11-06 21:54:54,588 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 21:54:54,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:54,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:54,592 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:54,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-06 21:54:54,677 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:54:54,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:54:54,678 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 21:54:54,679 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:54,844 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:54,844 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:55,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:55,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823815295] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:55,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:54:55,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 23 [2023-11-06 21:54:55,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331914587] [2023-11-06 21:54:55,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:55,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 21:54:55,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:55,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 21:54:55,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2023-11-06 21:54:55,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 196 [2023-11-06 21:54:55,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 297 transitions, 4423 flow. Second operand has 25 states, 25 states have (on average 77.72) internal successors, (1943), 25 states have internal predecessors, (1943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:55,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:55,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 196 [2023-11-06 21:54:55,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:56,850 INFO L124 PetriNetUnfolderBase]: 816/1697 cut-off events. [2023-11-06 21:54:56,850 INFO L125 PetriNetUnfolderBase]: For 41335/41335 co-relation queries the response was YES. [2023-11-06 21:54:56,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13430 conditions, 1697 events. 816/1697 cut-off events. For 41335/41335 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 11126 event pairs, 59 based on Foata normal form. 18/1715 useless extension candidates. Maximal degree in co-relation 13342. Up to 573 conditions per place. [2023-11-06 21:54:56,865 INFO L140 encePairwiseOnDemand]: 188/196 looper letters, 204 selfloop transitions, 143 changer transitions 103/450 dead transitions. [2023-11-06 21:54:56,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 450 transitions, 7390 flow [2023-11-06 21:54:56,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-06 21:54:56,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-11-06 21:54:56,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 3222 transitions. [2023-11-06 21:54:56,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41096938775510206 [2023-11-06 21:54:56,870 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 3222 transitions. [2023-11-06 21:54:56,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 3222 transitions. [2023-11-06 21:54:56,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:56,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 3222 transitions. [2023-11-06 21:54:56,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 80.55) internal successors, (3222), 40 states have internal predecessors, (3222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:56,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 196.0) internal successors, (8036), 41 states have internal predecessors, (8036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:56,881 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 196.0) internal successors, (8036), 41 states have internal predecessors, (8036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:56,881 INFO L175 Difference]: Start difference. First operand has 268 places, 297 transitions, 4423 flow. Second operand 40 states and 3222 transitions. [2023-11-06 21:54:56,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 450 transitions, 7390 flow [2023-11-06 21:54:57,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 450 transitions, 6698 flow, removed 278 selfloop flow, removed 18 redundant places. [2023-11-06 21:54:57,125 INFO L231 Difference]: Finished difference. Result has 298 places, 271 transitions, 4279 flow [2023-11-06 21:54:57,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=3982, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=4279, PETRI_PLACES=298, PETRI_TRANSITIONS=271} [2023-11-06 21:54:57,126 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 269 predicate places. [2023-11-06 21:54:57,126 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 271 transitions, 4279 flow [2023-11-06 21:54:57,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 77.72) internal successors, (1943), 25 states have internal predecessors, (1943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:57,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:57,127 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:57,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:57,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-11-06 21:54:57,332 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 21:54:57,333 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:57,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1027168573, now seen corresponding path program 30 times [2023-11-06 21:54:57,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:57,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968450873] [2023-11-06 21:54:57,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:57,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:57,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:57,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:57,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:57,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968450873] [2023-11-06 21:54:57,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968450873] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:54:57,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486233819] [2023-11-06 21:54:57,552 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 21:54:57,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:57,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:57,553 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:57,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-06 21:54:57,647 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 21:54:57,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:54:57,648 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 21:54:57,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:57,822 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:57,823 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:58,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:58,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486233819] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:58,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:54:58,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-11-06 21:54:58,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556656197] [2023-11-06 21:54:58,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:58,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 21:54:58,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:58,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 21:54:58,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2023-11-06 21:54:58,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 196 [2023-11-06 21:54:58,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 271 transitions, 4279 flow. Second operand has 26 states, 26 states have (on average 77.61538461538461) internal successors, (2018), 26 states have internal predecessors, (2018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:58,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:54:58,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 196 [2023-11-06 21:54:58,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:54:59,299 INFO L124 PetriNetUnfolderBase]: 578/1215 cut-off events. [2023-11-06 21:54:59,299 INFO L125 PetriNetUnfolderBase]: For 21449/21449 co-relation queries the response was YES. [2023-11-06 21:54:59,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9192 conditions, 1215 events. 578/1215 cut-off events. For 21449/21449 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 7337 event pairs, 50 based on Foata normal form. 3/1218 useless extension candidates. Maximal degree in co-relation 9098. Up to 605 conditions per place. [2023-11-06 21:54:59,312 INFO L140 encePairwiseOnDemand]: 188/196 looper letters, 191 selfloop transitions, 127 changer transitions 24/342 dead transitions. [2023-11-06 21:54:59,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 342 transitions, 5546 flow [2023-11-06 21:54:59,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-06 21:54:59,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-06 21:54:59,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2098 transitions. [2023-11-06 21:54:59,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41169544740973313 [2023-11-06 21:54:59,315 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2098 transitions. [2023-11-06 21:54:59,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2098 transitions. [2023-11-06 21:54:59,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:54:59,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2098 transitions. [2023-11-06 21:54:59,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 80.6923076923077) internal successors, (2098), 26 states have internal predecessors, (2098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:59,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 196.0) internal successors, (5292), 27 states have internal predecessors, (5292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:59,323 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 196.0) internal successors, (5292), 27 states have internal predecessors, (5292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:59,323 INFO L175 Difference]: Start difference. First operand has 298 places, 271 transitions, 4279 flow. Second operand 26 states and 2098 transitions. [2023-11-06 21:54:59,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 342 transitions, 5546 flow [2023-11-06 21:54:59,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 342 transitions, 4935 flow, removed 212 selfloop flow, removed 41 redundant places. [2023-11-06 21:54:59,484 INFO L231 Difference]: Finished difference. Result has 261 places, 267 transitions, 3987 flow [2023-11-06 21:54:59,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=3756, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=3987, PETRI_PLACES=261, PETRI_TRANSITIONS=267} [2023-11-06 21:54:59,485 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 232 predicate places. [2023-11-06 21:54:59,485 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 267 transitions, 3987 flow [2023-11-06 21:54:59,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 77.61538461538461) internal successors, (2018), 26 states have internal predecessors, (2018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:54:59,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:54:59,486 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:59,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:59,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:59,686 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 21:54:59,687 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:59,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1390016365, now seen corresponding path program 31 times [2023-11-06 21:54:59,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:59,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63818645] [2023-11-06 21:54:59,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:59,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:59,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:59,920 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:54:59,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:59,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63818645] [2023-11-06 21:54:59,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63818645] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:54:59,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276582648] [2023-11-06 21:54:59,921 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 21:54:59,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:59,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:59,923 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:59,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-06 21:55:00,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:00,028 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 21:55:00,029 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:00,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:00,212 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:55:00,479 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:00,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276582648] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:55:00,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:55:00,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 23 [2023-11-06 21:55:00,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353736301] [2023-11-06 21:55:00,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:55:00,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 21:55:00,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:55:00,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 21:55:00,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2023-11-06 21:55:00,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 196 [2023-11-06 21:55:00,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 267 transitions, 3987 flow. Second operand has 25 states, 25 states have (on average 77.68) internal successors, (1942), 25 states have internal predecessors, (1942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:00,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:55:00,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 196 [2023-11-06 21:55:00,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:55:02,122 INFO L124 PetriNetUnfolderBase]: 579/1208 cut-off events. [2023-11-06 21:55:02,122 INFO L125 PetriNetUnfolderBase]: For 12619/12619 co-relation queries the response was YES. [2023-11-06 21:55:02,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8409 conditions, 1208 events. 579/1208 cut-off events. For 12619/12619 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 7252 event pairs, 42 based on Foata normal form. 9/1217 useless extension candidates. Maximal degree in co-relation 8332. Up to 432 conditions per place. [2023-11-06 21:55:02,133 INFO L140 encePairwiseOnDemand]: 188/196 looper letters, 199 selfloop transitions, 136 changer transitions 19/354 dead transitions. [2023-11-06 21:55:02,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 354 transitions, 5367 flow [2023-11-06 21:55:02,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-06 21:55:02,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-06 21:55:02,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2885 transitions. [2023-11-06 21:55:02,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4088718820861678 [2023-11-06 21:55:02,137 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2885 transitions. [2023-11-06 21:55:02,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2885 transitions. [2023-11-06 21:55:02,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:55:02,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2885 transitions. [2023-11-06 21:55:02,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 80.13888888888889) internal successors, (2885), 36 states have internal predecessors, (2885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:02,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 196.0) internal successors, (7252), 37 states have internal predecessors, (7252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:02,143 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 196.0) internal successors, (7252), 37 states have internal predecessors, (7252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:02,144 INFO L175 Difference]: Start difference. First operand has 261 places, 267 transitions, 3987 flow. Second operand 36 states and 2885 transitions. [2023-11-06 21:55:02,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 354 transitions, 5367 flow [2023-11-06 21:55:02,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 354 transitions, 5035 flow, removed 34 selfloop flow, removed 26 redundant places. [2023-11-06 21:55:02,225 INFO L231 Difference]: Finished difference. Result has 260 places, 261 transitions, 3905 flow [2023-11-06 21:55:02,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=3636, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=3905, PETRI_PLACES=260, PETRI_TRANSITIONS=261} [2023-11-06 21:55:02,226 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 231 predicate places. [2023-11-06 21:55:02,226 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 261 transitions, 3905 flow [2023-11-06 21:55:02,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 77.68) internal successors, (1942), 25 states have internal predecessors, (1942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:02,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:55:02,227 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:02,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-11-06 21:55:02,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-11-06 21:55:02,427 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 21:55:02,428 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:02,428 INFO L85 PathProgramCache]: Analyzing trace with hash 193104393, now seen corresponding path program 32 times [2023-11-06 21:55:02,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:55:02,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633153014] [2023-11-06 21:55:02,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:02,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:55:02,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:02,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:02,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:55:02,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633153014] [2023-11-06 21:55:02,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633153014] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:55:02,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761803235] [2023-11-06 21:55:02,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:55:02,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:02,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:55:02,655 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:55:02,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-06 21:55:02,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:55:02,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:55:02,763 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 21:55:02,764 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:02,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:02,961 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:55:03,267 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:03,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761803235] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:55:03,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:55:03,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 23 [2023-11-06 21:55:03,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784651357] [2023-11-06 21:55:03,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:55:03,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 21:55:03,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:55:03,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 21:55:03,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2023-11-06 21:55:03,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 196 [2023-11-06 21:55:03,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 261 transitions, 3905 flow. Second operand has 25 states, 25 states have (on average 77.64) internal successors, (1941), 25 states have internal predecessors, (1941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:03,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:55:03,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 196 [2023-11-06 21:55:03,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:55:04,468 INFO L124 PetriNetUnfolderBase]: 551/1125 cut-off events. [2023-11-06 21:55:04,468 INFO L125 PetriNetUnfolderBase]: For 11598/11598 co-relation queries the response was YES. [2023-11-06 21:55:04,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7891 conditions, 1125 events. 551/1125 cut-off events. For 11598/11598 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 6433 event pairs, 42 based on Foata normal form. 8/1133 useless extension candidates. Maximal degree in co-relation 7817. Up to 432 conditions per place. [2023-11-06 21:55:04,479 INFO L140 encePairwiseOnDemand]: 188/196 looper letters, 175 selfloop transitions, 142 changer transitions 17/334 dead transitions. [2023-11-06 21:55:04,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 334 transitions, 5099 flow [2023-11-06 21:55:04,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-06 21:55:04,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-06 21:55:04,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2484 transitions. [2023-11-06 21:55:04,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4088215931533904 [2023-11-06 21:55:04,482 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2484 transitions. [2023-11-06 21:55:04,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2484 transitions. [2023-11-06 21:55:04,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:55:04,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2484 transitions. [2023-11-06 21:55:04,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 80.12903225806451) internal successors, (2484), 31 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:04,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 196.0) internal successors, (6272), 32 states have internal predecessors, (6272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:04,489 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 196.0) internal successors, (6272), 32 states have internal predecessors, (6272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:04,489 INFO L175 Difference]: Start difference. First operand has 260 places, 261 transitions, 3905 flow. Second operand 31 states and 2484 transitions. [2023-11-06 21:55:04,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 334 transitions, 5099 flow [2023-11-06 21:55:04,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 334 transitions, 4743 flow, removed 24 selfloop flow, removed 34 redundant places. [2023-11-06 21:55:04,566 INFO L231 Difference]: Finished difference. Result has 257 places, 262 transitions, 4015 flow [2023-11-06 21:55:04,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=3562, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=4015, PETRI_PLACES=257, PETRI_TRANSITIONS=262} [2023-11-06 21:55:04,570 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 228 predicate places. [2023-11-06 21:55:04,570 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 262 transitions, 4015 flow [2023-11-06 21:55:04,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 77.64) internal successors, (1941), 25 states have internal predecessors, (1941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:04,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:55:04,571 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:04,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-11-06 21:55:04,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-06 21:55:04,777 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 21:55:04,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:04,777 INFO L85 PathProgramCache]: Analyzing trace with hash 712310589, now seen corresponding path program 33 times [2023-11-06 21:55:04,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:55:04,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415116622] [2023-11-06 21:55:04,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:04,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:55:04,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:05,019 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:05,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:55:05,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415116622] [2023-11-06 21:55:05,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415116622] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:55:05,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712758908] [2023-11-06 21:55:05,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:55:05,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:05,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:55:05,021 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:55:05,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-06 21:55:05,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 21:55:05,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:55:05,127 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 21:55:05,128 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:05,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:05,312 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:55:05,590 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:05,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712758908] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:55:05,590 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:55:05,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 22 [2023-11-06 21:55:05,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315366609] [2023-11-06 21:55:05,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:55:05,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 21:55:05,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:55:05,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 21:55:05,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2023-11-06 21:55:05,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 196 [2023-11-06 21:55:05,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 262 transitions, 4015 flow. Second operand has 24 states, 24 states have (on average 77.66666666666667) internal successors, (1864), 24 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:05,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:55:05,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 196 [2023-11-06 21:55:05,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:55:06,924 INFO L124 PetriNetUnfolderBase]: 550/1087 cut-off events. [2023-11-06 21:55:06,924 INFO L125 PetriNetUnfolderBase]: For 13964/13964 co-relation queries the response was YES. [2023-11-06 21:55:06,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8027 conditions, 1087 events. 550/1087 cut-off events. For 13964/13964 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 5999 event pairs, 8 based on Foata normal form. 5/1092 useless extension candidates. Maximal degree in co-relation 7954. Up to 543 conditions per place. [2023-11-06 21:55:06,940 INFO L140 encePairwiseOnDemand]: 188/196 looper letters, 226 selfloop transitions, 98 changer transitions 17/341 dead transitions. [2023-11-06 21:55:06,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 341 transitions, 5405 flow [2023-11-06 21:55:06,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-06 21:55:06,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-06 21:55:06,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2093 transitions. [2023-11-06 21:55:06,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2023-11-06 21:55:06,943 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2093 transitions. [2023-11-06 21:55:06,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2093 transitions. [2023-11-06 21:55:06,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:55:06,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2093 transitions. [2023-11-06 21:55:06,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 80.5) internal successors, (2093), 26 states have internal predecessors, (2093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:06,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 196.0) internal successors, (5292), 27 states have internal predecessors, (5292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:06,952 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 196.0) internal successors, (5292), 27 states have internal predecessors, (5292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:06,952 INFO L175 Difference]: Start difference. First operand has 257 places, 262 transitions, 4015 flow. Second operand 26 states and 2093 transitions. [2023-11-06 21:55:06,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 341 transitions, 5405 flow [2023-11-06 21:55:07,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 341 transitions, 5086 flow, removed 67 selfloop flow, removed 22 redundant places. [2023-11-06 21:55:07,054 INFO L231 Difference]: Finished difference. Result has 260 places, 268 transitions, 4246 flow [2023-11-06 21:55:07,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=3704, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=4246, PETRI_PLACES=260, PETRI_TRANSITIONS=268} [2023-11-06 21:55:07,055 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 231 predicate places. [2023-11-06 21:55:07,055 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 268 transitions, 4246 flow [2023-11-06 21:55:07,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 77.66666666666667) internal successors, (1864), 24 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:07,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:55:07,056 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:07,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-11-06 21:55:07,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-06 21:55:07,259 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 21:55:07,260 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:07,260 INFO L85 PathProgramCache]: Analyzing trace with hash -942531119, now seen corresponding path program 34 times [2023-11-06 21:55:07,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:55:07,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571435268] [2023-11-06 21:55:07,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:07,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:55:07,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:07,491 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:07,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:55:07,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571435268] [2023-11-06 21:55:07,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571435268] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:55:07,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823563708] [2023-11-06 21:55:07,492 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 21:55:07,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:07,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:55:07,493 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:55:07,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-06 21:55:07,604 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 21:55:07,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:55:07,606 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 21:55:07,607 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:07,774 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:07,774 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:55:08,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:08,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823563708] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:55:08,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:55:08,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 22 [2023-11-06 21:55:08,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831186725] [2023-11-06 21:55:08,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:55:08,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 21:55:08,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:55:08,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 21:55:08,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2023-11-06 21:55:08,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 196 [2023-11-06 21:55:08,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 268 transitions, 4246 flow. Second operand has 24 states, 24 states have (on average 77.75) internal successors, (1866), 24 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:08,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:55:08,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 196 [2023-11-06 21:55:08,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:55:09,467 INFO L124 PetriNetUnfolderBase]: 563/1090 cut-off events. [2023-11-06 21:55:09,467 INFO L125 PetriNetUnfolderBase]: For 15793/15793 co-relation queries the response was YES. [2023-11-06 21:55:09,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8340 conditions, 1090 events. 563/1090 cut-off events. For 15793/15793 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 5888 event pairs, 8 based on Foata normal form. 6/1096 useless extension candidates. Maximal degree in co-relation 8266. Up to 543 conditions per place. [2023-11-06 21:55:09,477 INFO L140 encePairwiseOnDemand]: 188/196 looper letters, 235 selfloop transitions, 94 changer transitions 20/349 dead transitions. [2023-11-06 21:55:09,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 349 transitions, 5644 flow [2023-11-06 21:55:09,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-06 21:55:09,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-06 21:55:09,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2412 transitions. [2023-11-06 21:55:09,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41020408163265304 [2023-11-06 21:55:09,480 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2412 transitions. [2023-11-06 21:55:09,480 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2412 transitions. [2023-11-06 21:55:09,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:55:09,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2412 transitions. [2023-11-06 21:55:09,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 80.4) internal successors, (2412), 30 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:09,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 196.0) internal successors, (6076), 31 states have internal predecessors, (6076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:09,485 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 196.0) internal successors, (6076), 31 states have internal predecessors, (6076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:09,485 INFO L175 Difference]: Start difference. First operand has 260 places, 268 transitions, 4246 flow. Second operand 30 states and 2412 transitions. [2023-11-06 21:55:09,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 349 transitions, 5644 flow [2023-11-06 21:55:09,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 349 transitions, 5111 flow, removed 187 selfloop flow, removed 20 redundant places. [2023-11-06 21:55:09,577 INFO L231 Difference]: Finished difference. Result has 269 places, 273 transitions, 4146 flow [2023-11-06 21:55:09,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=3808, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=4146, PETRI_PLACES=269, PETRI_TRANSITIONS=273} [2023-11-06 21:55:09,578 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 240 predicate places. [2023-11-06 21:55:09,578 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 273 transitions, 4146 flow [2023-11-06 21:55:09,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 77.75) internal successors, (1866), 24 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:09,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:55:09,579 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:09,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-11-06 21:55:09,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:09,779 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 21:55:09,779 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:09,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1973238029, now seen corresponding path program 35 times [2023-11-06 21:55:09,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:55:09,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664624098] [2023-11-06 21:55:09,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:09,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:55:09,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:09,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:09,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:55:09,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664624098] [2023-11-06 21:55:09,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664624098] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:55:09,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769997312] [2023-11-06 21:55:09,995 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 21:55:09,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:09,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:55:09,996 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:55:10,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-06 21:55:10,099 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:55:10,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:55:10,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 21:55:10,101 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:10,250 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:10,250 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:55:10,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:10,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769997312] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:55:10,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:55:10,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-11-06 21:55:10,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639562515] [2023-11-06 21:55:10,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:55:10,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 21:55:10,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:55:10,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 21:55:10,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2023-11-06 21:55:10,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 196 [2023-11-06 21:55:10,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 273 transitions, 4146 flow. Second operand has 25 states, 25 states have (on average 77.68) internal successors, (1942), 25 states have internal predecessors, (1942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:10,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:55:10,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 196 [2023-11-06 21:55:10,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:55:12,013 INFO L124 PetriNetUnfolderBase]: 714/1329 cut-off events. [2023-11-06 21:55:12,014 INFO L125 PetriNetUnfolderBase]: For 15134/15134 co-relation queries the response was YES. [2023-11-06 21:55:12,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10280 conditions, 1329 events. 714/1329 cut-off events. For 15134/15134 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 7121 event pairs, 16 based on Foata normal form. 4/1333 useless extension candidates. Maximal degree in co-relation 10209. Up to 681 conditions per place. [2023-11-06 21:55:12,025 INFO L140 encePairwiseOnDemand]: 187/196 looper letters, 258 selfloop transitions, 133 changer transitions 62/453 dead transitions. [2023-11-06 21:55:12,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 453 transitions, 7121 flow [2023-11-06 21:55:12,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-06 21:55:12,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-11-06 21:55:12,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 3304 transitions. [2023-11-06 21:55:12,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41114982578397213 [2023-11-06 21:55:12,030 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 3304 transitions. [2023-11-06 21:55:12,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 3304 transitions. [2023-11-06 21:55:12,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:55:12,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 3304 transitions. [2023-11-06 21:55:12,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 80.58536585365853) internal successors, (3304), 41 states have internal predecessors, (3304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:12,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 196.0) internal successors, (8232), 42 states have internal predecessors, (8232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:12,040 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 196.0) internal successors, (8232), 42 states have internal predecessors, (8232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:12,041 INFO L175 Difference]: Start difference. First operand has 269 places, 273 transitions, 4146 flow. Second operand 41 states and 3304 transitions. [2023-11-06 21:55:12,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 453 transitions, 7121 flow [2023-11-06 21:55:12,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 453 transitions, 6754 flow, removed 75 selfloop flow, removed 22 redundant places. [2023-11-06 21:55:12,147 INFO L231 Difference]: Finished difference. Result has 289 places, 317 transitions, 5041 flow [2023-11-06 21:55:12,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=3895, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=5041, PETRI_PLACES=289, PETRI_TRANSITIONS=317} [2023-11-06 21:55:12,148 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 260 predicate places. [2023-11-06 21:55:12,148 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 317 transitions, 5041 flow [2023-11-06 21:55:12,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 77.68) internal successors, (1942), 25 states have internal predecessors, (1942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:12,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:55:12,149 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:12,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-11-06 21:55:12,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:12,349 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 21:55:12,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:12,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1403218091, now seen corresponding path program 36 times [2023-11-06 21:55:12,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:55:12,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950335000] [2023-11-06 21:55:12,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:12,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:55:12,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:12,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:12,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:55:12,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950335000] [2023-11-06 21:55:12,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950335000] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:55:12,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949392565] [2023-11-06 21:55:12,575 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 21:55:12,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:12,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:55:12,577 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:55:12,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-06 21:55:12,688 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-06 21:55:12,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:55:12,689 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 21:55:12,691 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:12,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:12,860 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:55:13,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:13,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949392565] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:55:13,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:55:13,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 22 [2023-11-06 21:55:13,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462964299] [2023-11-06 21:55:13,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:55:13,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 21:55:13,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:55:13,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 21:55:13,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2023-11-06 21:55:13,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 196 [2023-11-06 21:55:13,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 317 transitions, 5041 flow. Second operand has 24 states, 24 states have (on average 77.75) internal successors, (1866), 24 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:13,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:55:13,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 196 [2023-11-06 21:55:13,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:55:14,332 INFO L124 PetriNetUnfolderBase]: 647/1199 cut-off events. [2023-11-06 21:55:14,332 INFO L125 PetriNetUnfolderBase]: For 15609/15609 co-relation queries the response was YES. [2023-11-06 21:55:14,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9737 conditions, 1199 events. 647/1199 cut-off events. For 15609/15609 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 6157 event pairs, 8 based on Foata normal form. 11/1208 useless extension candidates. Maximal degree in co-relation 9660. Up to 548 conditions per place. [2023-11-06 21:55:14,343 INFO L140 encePairwiseOnDemand]: 188/196 looper letters, 234 selfloop transitions, 76 changer transitions 76/386 dead transitions. [2023-11-06 21:55:14,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 386 transitions, 6348 flow [2023-11-06 21:55:14,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-06 21:55:14,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-06 21:55:14,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2486 transitions. [2023-11-06 21:55:14,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40915075707702436 [2023-11-06 21:55:14,347 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2486 transitions. [2023-11-06 21:55:14,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2486 transitions. [2023-11-06 21:55:14,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:55:14,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2486 transitions. [2023-11-06 21:55:14,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 80.19354838709677) internal successors, (2486), 31 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:14,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 196.0) internal successors, (6272), 32 states have internal predecessors, (6272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:14,352 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 196.0) internal successors, (6272), 32 states have internal predecessors, (6272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:14,352 INFO L175 Difference]: Start difference. First operand has 289 places, 317 transitions, 5041 flow. Second operand 31 states and 2486 transitions. [2023-11-06 21:55:14,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 386 transitions, 6348 flow [2023-11-06 21:55:14,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 386 transitions, 5803 flow, removed 186 selfloop flow, removed 28 redundant places. [2023-11-06 21:55:14,470 INFO L231 Difference]: Finished difference. Result has 277 places, 274 transitions, 4051 flow [2023-11-06 21:55:14,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=4495, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=4051, PETRI_PLACES=277, PETRI_TRANSITIONS=274} [2023-11-06 21:55:14,471 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 248 predicate places. [2023-11-06 21:55:14,471 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 274 transitions, 4051 flow [2023-11-06 21:55:14,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 77.75) internal successors, (1866), 24 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:14,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:55:14,472 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:14,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-11-06 21:55:14,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:14,676 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 21:55:14,676 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:14,677 INFO L85 PathProgramCache]: Analyzing trace with hash -2099615439, now seen corresponding path program 37 times [2023-11-06 21:55:14,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:55:14,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618163080] [2023-11-06 21:55:14,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:14,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:55:14,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:14,940 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 21:55:14,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:55:14,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618163080] [2023-11-06 21:55:14,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618163080] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:55:14,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823879285] [2023-11-06 21:55:14,941 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 21:55:14,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:14,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:55:14,942 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:55:14,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-06 21:55:15,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:15,051 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-06 21:55:15,052 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:15,266 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 21:55:15,266 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:55:15,553 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:15,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823879285] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:55:15,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:55:15,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2023-11-06 21:55:15,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53849366] [2023-11-06 21:55:15,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:55:15,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-06 21:55:15,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:55:15,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-06 21:55:15,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2023-11-06 21:55:15,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 196 [2023-11-06 21:55:15,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 274 transitions, 4051 flow. Second operand has 29 states, 29 states have (on average 77.51724137931035) internal successors, (2248), 29 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:15,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:55:15,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 196 [2023-11-06 21:55:15,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:55:17,941 INFO L124 PetriNetUnfolderBase]: 767/1399 cut-off events. [2023-11-06 21:55:17,941 INFO L125 PetriNetUnfolderBase]: For 12032/12032 co-relation queries the response was YES. [2023-11-06 21:55:17,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10728 conditions, 1399 events. 767/1399 cut-off events. For 12032/12032 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 7369 event pairs, 3 based on Foata normal form. 5/1402 useless extension candidates. Maximal degree in co-relation 10659. Up to 489 conditions per place. [2023-11-06 21:55:17,952 INFO L140 encePairwiseOnDemand]: 188/196 looper letters, 187 selfloop transitions, 298 changer transitions 31/516 dead transitions. [2023-11-06 21:55:17,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 516 transitions, 7965 flow [2023-11-06 21:55:17,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-11-06 21:55:17,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2023-11-06 21:55:17,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 4869 transitions. [2023-11-06 21:55:17,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40724322515891603 [2023-11-06 21:55:17,958 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 4869 transitions. [2023-11-06 21:55:17,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 4869 transitions. [2023-11-06 21:55:17,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:55:17,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 4869 transitions. [2023-11-06 21:55:17,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 79.81967213114754) internal successors, (4869), 61 states have internal predecessors, (4869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:17,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 196.0) internal successors, (12152), 62 states have internal predecessors, (12152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:17,969 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 196.0) internal successors, (12152), 62 states have internal predecessors, (12152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:17,969 INFO L175 Difference]: Start difference. First operand has 277 places, 274 transitions, 4051 flow. Second operand 61 states and 4869 transitions. [2023-11-06 21:55:17,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 516 transitions, 7965 flow [2023-11-06 21:55:18,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 516 transitions, 7521 flow, removed 51 selfloop flow, removed 28 redundant places. [2023-11-06 21:55:18,057 INFO L231 Difference]: Finished difference. Result has 302 places, 385 transitions, 6282 flow [2023-11-06 21:55:18,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=3706, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=6282, PETRI_PLACES=302, PETRI_TRANSITIONS=385} [2023-11-06 21:55:18,058 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 273 predicate places. [2023-11-06 21:55:18,058 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 385 transitions, 6282 flow [2023-11-06 21:55:18,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 77.51724137931035) internal successors, (2248), 29 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:18,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:55:18,059 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:18,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-11-06 21:55:18,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:18,265 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 21:55:18,265 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:18,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1102132263, now seen corresponding path program 38 times [2023-11-06 21:55:18,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:55:18,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511804915] [2023-11-06 21:55:18,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:18,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:55:18,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:18,516 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 21:55:18,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:55:18,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511804915] [2023-11-06 21:55:18,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511804915] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:55:18,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989509586] [2023-11-06 21:55:18,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:55:18,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:18,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:55:18,518 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:55:18,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-11-06 21:55:18,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:55:18,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:55:18,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-06 21:55:18,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:18,847 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 21:55:18,847 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:55:19,124 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 21:55:19,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989509586] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:55:19,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:55:19,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2023-11-06 21:55:19,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071564173] [2023-11-06 21:55:19,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:55:19,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-06 21:55:19,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:55:19,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-06 21:55:19,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2023-11-06 21:55:19,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 196 [2023-11-06 21:55:19,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 385 transitions, 6282 flow. Second operand has 29 states, 29 states have (on average 77.51724137931035) internal successors, (2248), 29 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:19,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:55:19,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 196 [2023-11-06 21:55:19,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:55:20,913 INFO L124 PetriNetUnfolderBase]: 725/1327 cut-off events. [2023-11-06 21:55:20,914 INFO L125 PetriNetUnfolderBase]: For 12994/12994 co-relation queries the response was YES. [2023-11-06 21:55:20,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11011 conditions, 1327 events. 725/1327 cut-off events. For 12994/12994 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 6826 event pairs, 3 based on Foata normal form. 3/1328 useless extension candidates. Maximal degree in co-relation 10936. Up to 473 conditions per place. [2023-11-06 21:55:20,928 INFO L140 encePairwiseOnDemand]: 188/196 looper letters, 165 selfloop transitions, 295 changer transitions 17/477 dead transitions. [2023-11-06 21:55:20,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 477 transitions, 7957 flow [2023-11-06 21:55:20,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-06 21:55:20,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-11-06 21:55:20,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 3834 transitions. [2023-11-06 21:55:20,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4075255102040816 [2023-11-06 21:55:20,932 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 3834 transitions. [2023-11-06 21:55:20,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 3834 transitions. [2023-11-06 21:55:20,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:55:20,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 3834 transitions. [2023-11-06 21:55:20,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 79.875) internal successors, (3834), 48 states have internal predecessors, (3834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:20,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 196.0) internal successors, (9604), 49 states have internal predecessors, (9604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:20,941 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 196.0) internal successors, (9604), 49 states have internal predecessors, (9604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:20,942 INFO L175 Difference]: Start difference. First operand has 302 places, 385 transitions, 6282 flow. Second operand 48 states and 3834 transitions. [2023-11-06 21:55:20,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 477 transitions, 7957 flow [2023-11-06 21:55:21,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 477 transitions, 7102 flow, removed 240 selfloop flow, removed 27 redundant places. [2023-11-06 21:55:21,078 INFO L231 Difference]: Finished difference. Result has 320 places, 383 transitions, 6047 flow [2023-11-06 21:55:21,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=5437, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=291, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=6047, PETRI_PLACES=320, PETRI_TRANSITIONS=383} [2023-11-06 21:55:21,079 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 291 predicate places. [2023-11-06 21:55:21,079 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 383 transitions, 6047 flow [2023-11-06 21:55:21,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 77.51724137931035) internal successors, (2248), 29 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:21,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:55:21,080 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:21,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-11-06 21:55:21,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:21,280 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 21:55:21,281 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:21,281 INFO L85 PathProgramCache]: Analyzing trace with hash -893510941, now seen corresponding path program 39 times [2023-11-06 21:55:21,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:55:21,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915250183] [2023-11-06 21:55:21,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:21,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:55:21,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:21,517 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 21:55:21,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:55:21,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915250183] [2023-11-06 21:55:21,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915250183] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:55:21,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316571020] [2023-11-06 21:55:21,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:55:21,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:21,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:55:21,519 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:55:21,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-11-06 21:55:21,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-06 21:55:21,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:55:21,634 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-06 21:55:21,635 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:21,842 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 21:55:21,842 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:55:22,038 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 21:55:22,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316571020] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:55:22,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:55:22,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2023-11-06 21:55:22,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180729434] [2023-11-06 21:55:22,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:55:22,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 21:55:22,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:55:22,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 21:55:22,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2023-11-06 21:55:22,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 196 [2023-11-06 21:55:22,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 383 transitions, 6047 flow. Second operand has 26 states, 26 states have (on average 77.65384615384616) internal successors, (2019), 26 states have internal predecessors, (2019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:22,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:55:22,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 196 [2023-11-06 21:55:22,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:55:23,651 INFO L124 PetriNetUnfolderBase]: 1162/2067 cut-off events. [2023-11-06 21:55:23,651 INFO L125 PetriNetUnfolderBase]: For 22749/22749 co-relation queries the response was YES. [2023-11-06 21:55:23,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17556 conditions, 2067 events. 1162/2067 cut-off events. For 22749/22749 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 11442 event pairs, 1 based on Foata normal form. 10/2075 useless extension candidates. Maximal degree in co-relation 17486. Up to 1013 conditions per place. [2023-11-06 21:55:23,670 INFO L140 encePairwiseOnDemand]: 187/196 looper letters, 341 selfloop transitions, 212 changer transitions 154/707 dead transitions. [2023-11-06 21:55:23,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 707 transitions, 12451 flow [2023-11-06 21:55:23,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-06 21:55:23,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-11-06 21:55:23,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 3746 transitions. [2023-11-06 21:55:23,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4066435084672167 [2023-11-06 21:55:23,674 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 3746 transitions. [2023-11-06 21:55:23,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 3746 transitions. [2023-11-06 21:55:23,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:55:23,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 3746 transitions. [2023-11-06 21:55:23,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 79.70212765957447) internal successors, (3746), 47 states have internal predecessors, (3746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:23,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 196.0) internal successors, (9408), 48 states have internal predecessors, (9408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:23,684 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 196.0) internal successors, (9408), 48 states have internal predecessors, (9408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:23,684 INFO L175 Difference]: Start difference. First operand has 320 places, 383 transitions, 6047 flow. Second operand 47 states and 3746 transitions. [2023-11-06 21:55:23,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 707 transitions, 12451 flow [2023-11-06 21:55:23,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 707 transitions, 11353 flow, removed 35 selfloop flow, removed 40 redundant places. [2023-11-06 21:55:23,865 INFO L231 Difference]: Finished difference. Result has 342 places, 487 transitions, 8342 flow [2023-11-06 21:55:23,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=5382, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=8342, PETRI_PLACES=342, PETRI_TRANSITIONS=487} [2023-11-06 21:55:23,866 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 313 predicate places. [2023-11-06 21:55:23,866 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 487 transitions, 8342 flow [2023-11-06 21:55:23,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 77.65384615384616) internal successors, (2019), 26 states have internal predecessors, (2019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:23,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:55:23,867 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:23,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-11-06 21:55:24,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-11-06 21:55:24,067 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 21:55:24,067 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:24,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1780882831, now seen corresponding path program 40 times [2023-11-06 21:55:24,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:55:24,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002614229] [2023-11-06 21:55:24,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:24,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:55:24,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:24,281 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 21:55:24,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:55:24,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002614229] [2023-11-06 21:55:24,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002614229] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:55:24,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670183535] [2023-11-06 21:55:24,282 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 21:55:24,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:24,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:55:24,283 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:55:24,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-11-06 21:55:24,381 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 21:55:24,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:55:24,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-06 21:55:24,383 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:24,567 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 21:55:24,567 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:55:24,768 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 21:55:24,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670183535] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:55:24,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:55:24,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2023-11-06 21:55:24,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519697709] [2023-11-06 21:55:24,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:55:24,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 21:55:24,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:55:24,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 21:55:24,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2023-11-06 21:55:24,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 196 [2023-11-06 21:55:24,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 487 transitions, 8342 flow. Second operand has 26 states, 26 states have (on average 77.65384615384616) internal successors, (2019), 26 states have internal predecessors, (2019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:24,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:55:24,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 196 [2023-11-06 21:55:24,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:55:26,366 INFO L124 PetriNetUnfolderBase]: 1185/2062 cut-off events. [2023-11-06 21:55:26,366 INFO L125 PetriNetUnfolderBase]: For 34412/34412 co-relation queries the response was YES. [2023-11-06 21:55:26,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19466 conditions, 2062 events. 1185/2062 cut-off events. For 34412/34412 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 11006 event pairs, 2 based on Foata normal form. 8/2070 useless extension candidates. Maximal degree in co-relation 19376. Up to 1090 conditions per place. [2023-11-06 21:55:26,391 INFO L140 encePairwiseOnDemand]: 187/196 looper letters, 375 selfloop transitions, 170 changer transitions 150/695 dead transitions. [2023-11-06 21:55:26,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 695 transitions, 13158 flow [2023-11-06 21:55:26,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-06 21:55:26,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-11-06 21:55:26,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 3271 transitions. [2023-11-06 21:55:26,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4070433051269288 [2023-11-06 21:55:26,395 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 3271 transitions. [2023-11-06 21:55:26,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 3271 transitions. [2023-11-06 21:55:26,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:55:26,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 3271 transitions. [2023-11-06 21:55:26,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 79.78048780487805) internal successors, (3271), 41 states have internal predecessors, (3271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:26,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 196.0) internal successors, (8232), 42 states have internal predecessors, (8232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:26,403 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 196.0) internal successors, (8232), 42 states have internal predecessors, (8232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:26,403 INFO L175 Difference]: Start difference. First operand has 342 places, 487 transitions, 8342 flow. Second operand 41 states and 3271 transitions. [2023-11-06 21:55:26,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 695 transitions, 13158 flow [2023-11-06 21:55:26,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 695 transitions, 12304 flow, removed 328 selfloop flow, removed 41 redundant places. [2023-11-06 21:55:26,762 INFO L231 Difference]: Finished difference. Result has 349 places, 497 transitions, 8985 flow [2023-11-06 21:55:26,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=7700, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=8985, PETRI_PLACES=349, PETRI_TRANSITIONS=497} [2023-11-06 21:55:26,763 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 320 predicate places. [2023-11-06 21:55:26,763 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 497 transitions, 8985 flow [2023-11-06 21:55:26,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 77.65384615384616) internal successors, (2019), 26 states have internal predecessors, (2019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:26,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:55:26,763 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:26,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-11-06 21:55:26,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-11-06 21:55:26,964 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 21:55:26,964 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:26,964 INFO L85 PathProgramCache]: Analyzing trace with hash -565702671, now seen corresponding path program 41 times [2023-11-06 21:55:26,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:55:26,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573595072] [2023-11-06 21:55:26,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:26,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:55:26,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:27,174 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:27,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:55:27,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573595072] [2023-11-06 21:55:27,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573595072] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:55:27,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105091960] [2023-11-06 21:55:27,175 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 21:55:27,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:27,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:55:27,176 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:55:27,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-11-06 21:55:27,272 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-06 21:55:27,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:55:27,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-06 21:55:27,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:27,493 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:27,493 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:55:27,794 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:27,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105091960] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:55:27,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:55:27,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2023-11-06 21:55:27,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654082654] [2023-11-06 21:55:27,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:55:27,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-06 21:55:27,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:55:27,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-06 21:55:27,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2023-11-06 21:55:28,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 196 [2023-11-06 21:55:28,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 497 transitions, 8985 flow. Second operand has 30 states, 30 states have (on average 77.56666666666666) internal successors, (2327), 30 states have internal predecessors, (2327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:28,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:55:28,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 196 [2023-11-06 21:55:28,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:55:29,859 INFO L124 PetriNetUnfolderBase]: 1320/2262 cut-off events. [2023-11-06 21:55:29,859 INFO L125 PetriNetUnfolderBase]: For 50152/50152 co-relation queries the response was YES. [2023-11-06 21:55:29,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22993 conditions, 2262 events. 1320/2262 cut-off events. For 50152/50152 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 12175 event pairs, 2 based on Foata normal form. 7/2269 useless extension candidates. Maximal degree in co-relation 22895. Up to 1041 conditions per place. [2023-11-06 21:55:29,888 INFO L140 encePairwiseOnDemand]: 188/196 looper letters, 322 selfloop transitions, 279 changer transitions 159/760 dead transitions. [2023-11-06 21:55:29,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 760 transitions, 14889 flow [2023-11-06 21:55:29,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-06 21:55:29,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-11-06 21:55:29,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 3349 transitions. [2023-11-06 21:55:29,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4068270165208941 [2023-11-06 21:55:29,893 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 3349 transitions. [2023-11-06 21:55:29,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 3349 transitions. [2023-11-06 21:55:29,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:55:29,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 3349 transitions. [2023-11-06 21:55:29,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 79.73809523809524) internal successors, (3349), 42 states have internal predecessors, (3349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:29,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 196.0) internal successors, (8428), 43 states have internal predecessors, (8428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:29,901 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 196.0) internal successors, (8428), 43 states have internal predecessors, (8428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:29,902 INFO L175 Difference]: Start difference. First operand has 349 places, 497 transitions, 8985 flow. Second operand 42 states and 3349 transitions. [2023-11-06 21:55:29,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 760 transitions, 14889 flow [2023-11-06 21:55:30,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 760 transitions, 14091 flow, removed 302 selfloop flow, removed 28 redundant places. [2023-11-06 21:55:30,438 INFO L231 Difference]: Finished difference. Result has 354 places, 533 transitions, 10625 flow [2023-11-06 21:55:30,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=8336, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=10625, PETRI_PLACES=354, PETRI_TRANSITIONS=533} [2023-11-06 21:55:30,439 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 325 predicate places. [2023-11-06 21:55:30,439 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 533 transitions, 10625 flow [2023-11-06 21:55:30,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 77.56666666666666) internal successors, (2327), 30 states have internal predecessors, (2327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:30,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:55:30,440 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:30,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-11-06 21:55:30,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-11-06 21:55:30,652 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 21:55:30,653 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:30,653 INFO L85 PathProgramCache]: Analyzing trace with hash 309571875, now seen corresponding path program 42 times [2023-11-06 21:55:30,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:55:30,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588023345] [2023-11-06 21:55:30,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:30,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:55:30,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:30,946 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:55:30,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:55:30,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588023345] [2023-11-06 21:55:30,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588023345] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:55:30,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741529843] [2023-11-06 21:55:30,946 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 21:55:30,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:30,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:55:30,947 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:55:30,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-11-06 21:55:31,060 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-06 21:55:31,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:55:31,062 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-06 21:55:31,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:31,331 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:31,331 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:55:31,697 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:31,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741529843] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:55:31,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:55:31,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 31 [2023-11-06 21:55:31,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525414945] [2023-11-06 21:55:31,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:55:31,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-06 21:55:31,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:55:31,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-06 21:55:31,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2023-11-06 21:55:31,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 196 [2023-11-06 21:55:31,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 533 transitions, 10625 flow. Second operand has 33 states, 33 states have (on average 77.57575757575758) internal successors, (2560), 33 states have internal predecessors, (2560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:31,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:55:31,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 196 [2023-11-06 21:55:31,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:55:33,743 INFO L124 PetriNetUnfolderBase]: 1157/1970 cut-off events. [2023-11-06 21:55:33,743 INFO L125 PetriNetUnfolderBase]: For 50540/50540 co-relation queries the response was YES. [2023-11-06 21:55:33,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21644 conditions, 1970 events. 1157/1970 cut-off events. For 50540/50540 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 10120 event pairs, 2 based on Foata normal form. 4/1974 useless extension candidates. Maximal degree in co-relation 21547. Up to 939 conditions per place. [2023-11-06 21:55:33,765 INFO L140 encePairwiseOnDemand]: 188/196 looper letters, 153 selfloop transitions, 26 changer transitions 469/648 dead transitions. [2023-11-06 21:55:33,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 648 transitions, 13699 flow [2023-11-06 21:55:33,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-06 21:55:33,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-11-06 21:55:33,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 3027 transitions. [2023-11-06 21:55:33,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4064178302900107 [2023-11-06 21:55:33,769 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 3027 transitions. [2023-11-06 21:55:33,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 3027 transitions. [2023-11-06 21:55:33,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:55:33,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 3027 transitions. [2023-11-06 21:55:33,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 79.65789473684211) internal successors, (3027), 38 states have internal predecessors, (3027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:33,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 196.0) internal successors, (7644), 39 states have internal predecessors, (7644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:33,781 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 196.0) internal successors, (7644), 39 states have internal predecessors, (7644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:33,781 INFO L175 Difference]: Start difference. First operand has 354 places, 533 transitions, 10625 flow. Second operand 38 states and 3027 transitions. [2023-11-06 21:55:33,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 648 transitions, 13699 flow [2023-11-06 21:55:34,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 648 transitions, 12905 flow, removed 314 selfloop flow, removed 31 redundant places. [2023-11-06 21:55:34,286 INFO L231 Difference]: Finished difference. Result has 343 places, 169 transitions, 3010 flow [2023-11-06 21:55:34,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=9953, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=3010, PETRI_PLACES=343, PETRI_TRANSITIONS=169} [2023-11-06 21:55:34,287 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 314 predicate places. [2023-11-06 21:55:34,288 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 169 transitions, 3010 flow [2023-11-06 21:55:34,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 77.57575757575758) internal successors, (2560), 33 states have internal predecessors, (2560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:34,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:55:34,288 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:34,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-11-06 21:55:34,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-11-06 21:55:34,500 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 21:55:34,500 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:55:34,501 INFO L85 PathProgramCache]: Analyzing trace with hash -603952041, now seen corresponding path program 43 times [2023-11-06 21:55:34,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:55:34,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405607735] [2023-11-06 21:55:34,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:55:34,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:55:34,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:34,800 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:55:34,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:55:34,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405607735] [2023-11-06 21:55:34,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405607735] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:55:34,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607062735] [2023-11-06 21:55:34,800 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 21:55:34,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:55:34,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:55:34,801 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:55:34,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-11-06 21:55:34,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:55:34,902 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-06 21:55:34,903 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:55:35,201 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:35,201 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:55:35,602 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:55:35,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607062735] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:55:35,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:55:35,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 30 [2023-11-06 21:55:35,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095939072] [2023-11-06 21:55:35,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:55:35,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-06 21:55:35,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:55:35,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-06 21:55:35,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2023-11-06 21:55:35,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 196 [2023-11-06 21:55:35,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 169 transitions, 3010 flow. Second operand has 32 states, 32 states have (on average 77.59375) internal successors, (2483), 32 states have internal predecessors, (2483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:35,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:55:35,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 196 [2023-11-06 21:55:35,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:55:36,938 INFO L124 PetriNetUnfolderBase]: 393/672 cut-off events. [2023-11-06 21:55:36,939 INFO L125 PetriNetUnfolderBase]: For 17308/17308 co-relation queries the response was YES. [2023-11-06 21:55:36,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7235 conditions, 672 events. 393/672 cut-off events. For 17308/17308 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2608 event pairs, 0 based on Foata normal form. 2/674 useless extension candidates. Maximal degree in co-relation 7138. Up to 293 conditions per place. [2023-11-06 21:55:36,944 INFO L140 encePairwiseOnDemand]: 188/196 looper letters, 0 selfloop transitions, 0 changer transitions 247/247 dead transitions. [2023-11-06 21:55:36,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 247 transitions, 4578 flow [2023-11-06 21:55:36,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-06 21:55:36,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-06 21:55:36,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2376 transitions. [2023-11-06 21:55:36,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40408163265306124 [2023-11-06 21:55:36,947 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2376 transitions. [2023-11-06 21:55:36,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2376 transitions. [2023-11-06 21:55:36,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:55:36,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2376 transitions. [2023-11-06 21:55:36,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 79.2) internal successors, (2376), 30 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:36,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 196.0) internal successors, (6076), 31 states have internal predecessors, (6076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:36,954 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 196.0) internal successors, (6076), 31 states have internal predecessors, (6076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:36,954 INFO L175 Difference]: Start difference. First operand has 343 places, 169 transitions, 3010 flow. Second operand 30 states and 2376 transitions. [2023-11-06 21:55:36,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 247 transitions, 4578 flow [2023-11-06 21:55:37,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 247 transitions, 3733 flow, removed 291 selfloop flow, removed 66 redundant places. [2023-11-06 21:55:37,062 INFO L231 Difference]: Finished difference. Result has 183 places, 0 transitions, 0 flow [2023-11-06 21:55:37,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=196, PETRI_DIFFERENCE_MINUEND_FLOW=2383, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=0, PETRI_PLACES=183, PETRI_TRANSITIONS=0} [2023-11-06 21:55:37,063 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 154 predicate places. [2023-11-06 21:55:37,063 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 0 transitions, 0 flow [2023-11-06 21:55:37,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 77.59375) internal successors, (2483), 32 states have internal predecessors, (2483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:55:37,066 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 12 remaining) [2023-11-06 21:55:37,066 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 12 remaining) [2023-11-06 21:55:37,067 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 12 remaining) [2023-11-06 21:55:37,067 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 12 remaining) [2023-11-06 21:55:37,067 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 12 remaining) [2023-11-06 21:55:37,067 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 12 remaining) [2023-11-06 21:55:37,067 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 12 remaining) [2023-11-06 21:55:37,067 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 12 remaining) [2023-11-06 21:55:37,067 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (3 of 12 remaining) [2023-11-06 21:55:37,067 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK (2 of 12 remaining) [2023-11-06 21:55:37,068 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 12 remaining) [2023-11-06 21:55:37,068 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 12 remaining) [2023-11-06 21:55:37,073 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2023-11-06 21:55:37,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-11-06 21:55:37,268 INFO L445 BasicCegarLoop]: Path program histogram: [43, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:55:37,271 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-06 21:55:37,271 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-06 21:55:37,275 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 09:55:37 BasicIcfg [2023-11-06 21:55:37,275 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-06 21:55:37,275 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-06 21:55:37,275 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-06 21:55:37,276 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-06 21:55:37,276 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:53:34" (3/4) ... [2023-11-06 21:55:37,278 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-06 21:55:37,281 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2023-11-06 21:55:37,281 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2023-11-06 21:55:37,285 INFO L939 BoogieBacktranslator]: Reduced CFG by removing 19 nodes and edges [2023-11-06 21:55:37,286 INFO L939 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2023-11-06 21:55:37,286 INFO L939 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-11-06 21:55:37,286 INFO L939 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-11-06 21:55:37,337 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/witness.graphml.graphml [2023-11-06 21:55:37,338 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/witness.graphml.yaml [2023-11-06 21:55:37,338 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-06 21:55:37,338 INFO L158 Benchmark]: Toolchain (without parser) took 124145.31ms. Allocated memory was 165.7MB in the beginning and 599.8MB in the end (delta: 434.1MB). Free memory was 129.4MB in the beginning and 469.4MB in the end (delta: -340.0MB). Peak memory consumption was 95.8MB. Max. memory is 16.1GB. [2023-11-06 21:55:37,339 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 136.3MB. Free memory is still 78.3MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 21:55:37,339 INFO L158 Benchmark]: CACSL2BoogieTranslator took 377.50ms. Allocated memory is still 165.7MB. Free memory was 129.4MB in the beginning and 118.2MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-06 21:55:37,339 INFO L158 Benchmark]: Boogie Procedure Inliner took 52.35ms. Allocated memory is still 165.7MB. Free memory was 118.2MB in the beginning and 116.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-06 21:55:37,340 INFO L158 Benchmark]: Boogie Preprocessor took 54.47ms. Allocated memory is still 165.7MB. Free memory was 116.8MB in the beginning and 115.5MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 21:55:37,340 INFO L158 Benchmark]: RCFGBuilder took 630.19ms. Allocated memory is still 165.7MB. Free memory was 115.5MB in the beginning and 99.4MB in the end (delta: 16.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2023-11-06 21:55:37,340 INFO L158 Benchmark]: TraceAbstraction took 122960.21ms. Allocated memory was 165.7MB in the beginning and 599.8MB in the end (delta: 434.1MB). Free memory was 98.8MB in the beginning and 473.1MB in the end (delta: -374.3MB). Peak memory consumption was 411.3MB. Max. memory is 16.1GB. [2023-11-06 21:55:37,341 INFO L158 Benchmark]: Witness Printer took 62.61ms. Allocated memory is still 599.8MB. Free memory was 473.1MB in the beginning and 469.4MB in the end (delta: 3.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-06 21:55:37,342 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 136.3MB. Free memory is still 78.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 377.50ms. Allocated memory is still 165.7MB. Free memory was 129.4MB in the beginning and 118.2MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 52.35ms. Allocated memory is still 165.7MB. Free memory was 118.2MB in the beginning and 116.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 54.47ms. Allocated memory is still 165.7MB. Free memory was 116.8MB in the beginning and 115.5MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 630.19ms. Allocated memory is still 165.7MB. Free memory was 115.5MB in the beginning and 99.4MB in the end (delta: 16.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 122960.21ms. Allocated memory was 165.7MB in the beginning and 599.8MB in the end (delta: 434.1MB). Free memory was 98.8MB in the beginning and 473.1MB in the end (delta: -374.3MB). Peak memory consumption was 411.3MB. Max. memory is 16.1GB. * Witness Printer took 62.61ms. Allocated memory is still 599.8MB. Free memory was 473.1MB in the beginning and 469.4MB in the end (delta: 3.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.8s, 94 PlacesBefore, 29 PlacesAfterwards, 93 TransitionsBefore, 24 TransitionsAfterwards, 580 CoEnabledTransitionPairs, 6 FixpointIterations, 61 TrivialSequentialCompositions, 23 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 96 TotalNumberOfCompositions, 647 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 647, independent: 646, independent conditional: 0, independent unconditional: 646, dependent: 1, dependent conditional: 0, dependent unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 301, independent: 300, independent conditional: 0, independent unconditional: 300, dependent: 1, dependent conditional: 0, dependent unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 647, independent: 346, independent conditional: 0, independent unconditional: 346, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 301, unknown conditional: 0, unknown unconditional: 301] , Statistics on independence cache: Total cache size (in pairs): 27, Positive cache size: 27, Positive conditional cache size: 0, Positive unconditional cache size: 27, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 21]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 64]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 113 locations, 12 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 122.8s, OverallIterations: 50, TraceHistogramMax: 5, PathProgramHistogramMax: 43, EmptinessCheckTime: 0.0s, AutomataDifference: 69.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 8493 SdHoareTripleChecker+Valid, 32.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7989 mSDsluCounter, 3286 SdHoareTripleChecker+Invalid, 27.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3066 mSDsCounter, 2029 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 48602 IncrementalHoareTripleChecker+Invalid, 50631 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2029 mSolverCounterUnsat, 220 mSDtfsCounter, 48602 mSolverCounterSat, 0.4s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2530 GetRequests, 728 SyntacticMatches, 13 SemanticMatches, 1789 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24167 ImplicationChecksByTransitivity, 31.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10625occurred in iteration=48, InterpolantAutomatonStates: 1291, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 34.8s InterpolantComputationTime, 1472 NumberOfCodeBlocks, 1472 NumberOfCodeBlocksAsserted, 142 NumberOfCheckSat, 2050 ConstructedInterpolants, 0 QuantifiedInterpolants, 22308 SizeOfPredicates, 175 NumberOfNonLiveVariables, 5307 ConjunctsInSsa, 808 ConjunctsInUnsatCore, 136 InterpolantComputations, 7 PerfectInterpolantSequences, 24/736 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 10 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-06 21:55:37,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d41caf32-913a-45ad-91c6-131c285d0b77/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE