./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-figure3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/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_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-figure3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/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_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/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 8978d351a1e877bd44e157215d417b40c01c7c886849af3efe046b60ddaacc95 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:54:42,631 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:54:42,747 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-06 22:54:42,752 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:54:42,753 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:54:42,798 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:54:42,800 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:54:42,801 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:54:42,802 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:54:42,807 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:54:42,809 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:54:42,809 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:54:42,810 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:54:42,812 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:54:42,812 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:54:42,813 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:54:42,813 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:54:42,814 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:54:42,814 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 22:54:42,815 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 22:54:42,815 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 22:54:42,816 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:54:42,816 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 22:54:42,817 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:54:42,817 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:54:42,818 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:54:42,819 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:54:42,819 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:54:42,820 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:54:42,820 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:54:42,822 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:54:42,822 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:54:42,822 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:54:42,823 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:54:42,823 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:54:42,823 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:54:42,823 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:54:42,824 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:54:42,824 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_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8978d351a1e877bd44e157215d417b40c01c7c886849af3efe046b60ddaacc95 [2023-11-06 22:54:43,131 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:54:43,163 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:54:43,166 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:54:43,168 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:54:43,169 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:54:43,170 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-figure3.wvr.c [2023-11-06 22:54:46,285 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:54:46,510 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:54:46,511 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/sv-benchmarks/c/weaver/popl20-figure3.wvr.c [2023-11-06 22:54:46,527 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/data/dfb64ac6b/b91391ebfc9b4d4a8e5a4c8b5e167f48/FLAGde961e7c9 [2023-11-06 22:54:46,543 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/data/dfb64ac6b/b91391ebfc9b4d4a8e5a4c8b5e167f48 [2023-11-06 22:54:46,546 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:54:46,547 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:54:46,549 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:54:46,549 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:54:46,555 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:54:46,556 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:54:46" (1/1) ... [2023-11-06 22:54:46,557 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4680893 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:46, skipping insertion in model container [2023-11-06 22:54:46,558 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:54:46" (1/1) ... [2023-11-06 22:54:46,592 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:54:46,775 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:54:46,783 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:54:46,801 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:54:46,810 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:54:46,810 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:54:46,818 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:54:46,818 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:46 WrapperNode [2023-11-06 22:54:46,818 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:54:46,820 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:54:46,820 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:54:46,820 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:54:46,828 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:46" (1/1) ... [2023-11-06 22:54:46,837 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:46" (1/1) ... [2023-11-06 22:54:46,872 INFO L138 Inliner]: procedures = 21, calls = 26, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 76 [2023-11-06 22:54:46,872 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:54:46,873 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:54:46,873 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:54:46,874 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:54:46,882 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:46" (1/1) ... [2023-11-06 22:54:46,883 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:46" (1/1) ... [2023-11-06 22:54:46,885 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:46" (1/1) ... [2023-11-06 22:54:46,886 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:46" (1/1) ... [2023-11-06 22:54:46,892 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:46" (1/1) ... [2023-11-06 22:54:46,895 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:46" (1/1) ... [2023-11-06 22:54:46,897 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:46" (1/1) ... [2023-11-06 22:54:46,898 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:46" (1/1) ... [2023-11-06 22:54:46,901 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:54:46,902 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:54:46,902 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:54:46,903 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:54:46,904 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:46" (1/1) ... [2023-11-06 22:54:46,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:54:46,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:54:46,953 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:54:46,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:54:46,985 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:54:46,985 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:54:46,986 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:54:46,986 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:54:46,986 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:54:46,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:54:46,986 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:54:46,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:54:46,987 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 22:54:46,987 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 22:54:46,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:54:46,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:54:46,987 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:54:46,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:54:46,989 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 22:54:47,084 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:54:47,086 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:54:47,371 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:54:47,404 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:54:47,404 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-06 22:54:47,407 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:54:47 BoogieIcfgContainer [2023-11-06 22:54:47,407 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:54:47,411 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:54:47,411 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:54:47,415 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:54:47,415 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:54:46" (1/3) ... [2023-11-06 22:54:47,416 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13011f4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:54:47, skipping insertion in model container [2023-11-06 22:54:47,416 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:46" (2/3) ... [2023-11-06 22:54:47,417 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13011f4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:54:47, skipping insertion in model container [2023-11-06 22:54:47,417 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:54:47" (3/3) ... [2023-11-06 22:54:47,418 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure3.wvr.c [2023-11-06 22:54:47,439 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:54:47,440 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-11-06 22:54:47,440 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:54:47,534 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 22:54:47,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 102 transitions, 218 flow [2023-11-06 22:54:47,700 INFO L124 PetriNetUnfolderBase]: 6/100 cut-off events. [2023-11-06 22:54:47,701 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:54:47,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 100 events. 6/100 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 90 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 54. Up to 2 conditions per place. [2023-11-06 22:54:47,708 INFO L82 GeneralOperation]: Start removeDead. Operand has 103 places, 102 transitions, 218 flow [2023-11-06 22:54:47,714 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 96 places, 95 transitions, 202 flow [2023-11-06 22:54:47,718 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:54:47,738 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 96 places, 95 transitions, 202 flow [2023-11-06 22:54:47,746 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 96 places, 95 transitions, 202 flow [2023-11-06 22:54:47,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 95 transitions, 202 flow [2023-11-06 22:54:47,795 INFO L124 PetriNetUnfolderBase]: 6/95 cut-off events. [2023-11-06 22:54:47,796 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:54:47,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104 conditions, 95 events. 6/95 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 89 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 54. Up to 2 conditions per place. [2023-11-06 22:54:47,801 INFO L119 LiptonReduction]: Number of co-enabled transitions 748 [2023-11-06 22:54:51,354 INFO L134 LiptonReduction]: Checked pairs total: 774 [2023-11-06 22:54:51,354 INFO L136 LiptonReduction]: Total number of compositions: 98 [2023-11-06 22:54:51,370 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:54:51,377 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;@4894637d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:54:51,377 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-11-06 22:54:51,379 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:54:51,379 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-11-06 22:54:51,379 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:54:51,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:54:51,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-06 22:54:51,381 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:54:51,386 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:54:51,386 INFO L85 PathProgramCache]: Analyzing trace with hash 403, now seen corresponding path program 1 times [2023-11-06 22:54:51,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:54:51,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093884732] [2023-11-06 22:54:51,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:54:51,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:54:51,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:54:51,502 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 22:54:51,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:54:51,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093884732] [2023-11-06 22:54:51,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093884732] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:54:51,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:54:51,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-06 22:54:51,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72460451] [2023-11-06 22:54:51,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:54:51,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:54:51,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:54:51,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:54:51,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:54:51,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 200 [2023-11-06 22:54:51,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 60 flow. Second operand has 2 states, 2 states have (on average 92.5) internal successors, (185), 2 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:51,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:54:51,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 200 [2023-11-06 22:54:51,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:54:51,645 INFO L124 PetriNetUnfolderBase]: 100/163 cut-off events. [2023-11-06 22:54:51,645 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-06 22:54:51,646 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 503 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 22:54:51,648 INFO L140 encePairwiseOnDemand]: 197/200 looper letters, 19 selfloop transitions, 0 changer transitions 0/21 dead transitions. [2023-11-06 22:54:51,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 21 transitions, 92 flow [2023-11-06 22:54:51,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:54:51,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-06 22:54:51,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 206 transitions. [2023-11-06 22:54:51,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.515 [2023-11-06 22:54:51,665 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 206 transitions. [2023-11-06 22:54:51,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 206 transitions. [2023-11-06 22:54:51,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:54:51,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 206 transitions. [2023-11-06 22:54:51,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 103.0) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:51,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 200.0) internal successors, (600), 3 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:51,682 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 200.0) internal successors, (600), 3 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:51,684 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 60 flow. Second operand 2 states and 206 transitions. [2023-11-06 22:54:51,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 21 transitions, 92 flow [2023-11-06 22:54:51,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 21 transitions, 84 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-06 22:54:51,690 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 46 flow [2023-11-06 22:54:51,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=46, PETRI_PLACES=23, PETRI_TRANSITIONS=21} [2023-11-06 22:54:51,696 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2023-11-06 22:54:51,697 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 46 flow [2023-11-06 22:54:51,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 92.5) internal successors, (185), 2 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:51,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:54:51,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 22:54:51,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:54:51,699 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:54:51,702 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:54:51,702 INFO L85 PathProgramCache]: Analyzing trace with hash 398045, now seen corresponding path program 1 times [2023-11-06 22:54:51,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:54:51,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695423687] [2023-11-06 22:54:51,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:54:51,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:54:51,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:54:51,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:54:51,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:54:51,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695423687] [2023-11-06 22:54:51,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695423687] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:54:51,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:54:51,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:54:51,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175616280] [2023-11-06 22:54:51,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:54:51,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:54:51,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:54:51,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:54:51,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:54:51,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 200 [2023-11-06 22:54:51,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:51,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:54:51,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 200 [2023-11-06 22:54:51,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:54:52,002 INFO L124 PetriNetUnfolderBase]: 93/150 cut-off events. [2023-11-06 22:54:52,002 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:54:52,003 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 445 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 22:54:52,004 INFO L140 encePairwiseOnDemand]: 197/200 looper letters, 16 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2023-11-06 22:54:52,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 76 flow [2023-11-06 22:54:52,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:54:52,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:54:52,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 265 transitions. [2023-11-06 22:54:52,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2023-11-06 22:54:52,009 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 265 transitions. [2023-11-06 22:54:52,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 265 transitions. [2023-11-06 22:54:52,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:54:52,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 265 transitions. [2023-11-06 22:54:52,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:52,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:52,017 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:52,018 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 46 flow. Second operand 3 states and 265 transitions. [2023-11-06 22:54:52,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 19 transitions, 76 flow [2023-11-06 22:54:52,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 19 transitions, 76 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:54:52,019 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 44 flow [2023-11-06 22:54:52,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2023-11-06 22:54:52,020 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2023-11-06 22:54:52,021 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 44 flow [2023-11-06 22:54:52,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:52,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:54:52,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 22:54:52,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:54:52,022 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:54:52,022 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:54:52,023 INFO L85 PathProgramCache]: Analyzing trace with hash 398046, now seen corresponding path program 1 times [2023-11-06 22:54:52,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:54:52,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638204766] [2023-11-06 22:54:52,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:54:52,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:54:52,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:54:52,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:54:52,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:54:52,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638204766] [2023-11-06 22:54:52,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638204766] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:54:52,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:54:52,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:54:52,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384219191] [2023-11-06 22:54:52,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:54:52,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:54:52,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:54:52,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:54:52,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:54:52,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 200 [2023-11-06 22:54:52,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:52,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:54:52,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 200 [2023-11-06 22:54:52,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:54:52,286 INFO L124 PetriNetUnfolderBase]: 86/137 cut-off events. [2023-11-06 22:54:52,287 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:54:52,287 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 408 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 22:54:52,289 INFO L140 encePairwiseOnDemand]: 197/200 looper letters, 14 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2023-11-06 22:54:52,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 17 transitions, 70 flow [2023-11-06 22:54:52,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:54:52,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:54:52,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 275 transitions. [2023-11-06 22:54:52,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2023-11-06 22:54:52,292 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 275 transitions. [2023-11-06 22:54:52,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 275 transitions. [2023-11-06 22:54:52,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:54:52,293 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 275 transitions. [2023-11-06 22:54:52,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:52,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:52,297 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:52,297 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 44 flow. Second operand 3 states and 275 transitions. [2023-11-06 22:54:52,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 17 transitions, 70 flow [2023-11-06 22:54:52,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 17 transitions, 69 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:54:52,299 INFO L231 Difference]: Finished difference. Result has 22 places, 17 transitions, 41 flow [2023-11-06 22:54:52,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=39, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=41, PETRI_PLACES=22, PETRI_TRANSITIONS=17} [2023-11-06 22:54:52,300 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-11-06 22:54:52,300 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 17 transitions, 41 flow [2023-11-06 22:54:52,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:52,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:54:52,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 22:54:52,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:54:52,301 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 22:54:52,302 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:54:52,302 INFO L85 PathProgramCache]: Analyzing trace with hash 382531938, now seen corresponding path program 1 times [2023-11-06 22:54:52,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:54:52,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433343164] [2023-11-06 22:54:52,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:54:52,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:54:52,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:54:52,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:54:52,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:54:52,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433343164] [2023-11-06 22:54:52,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433343164] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:54:52,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:54:52,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:54:52,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941317686] [2023-11-06 22:54:52,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:54:52,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:54:52,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:54:52,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:54:52,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:54:52,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 200 [2023-11-06 22:54:52,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 41 flow. Second operand has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:52,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:54:52,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 200 [2023-11-06 22:54:52,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:54:52,489 INFO L124 PetriNetUnfolderBase]: 65/107 cut-off events. [2023-11-06 22:54:52,490 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:54:52,490 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 281 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 22:54:52,491 INFO L140 encePairwiseOnDemand]: 198/200 looper letters, 13 selfloop transitions, 1 changer transitions 0/16 dead transitions. [2023-11-06 22:54:52,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 16 transitions, 67 flow [2023-11-06 22:54:52,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:54:52,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:54:52,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 264 transitions. [2023-11-06 22:54:52,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44 [2023-11-06 22:54:52,493 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 264 transitions. [2023-11-06 22:54:52,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 264 transitions. [2023-11-06 22:54:52,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:54:52,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 264 transitions. [2023-11-06 22:54:52,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:52,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:52,498 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:52,498 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 41 flow. Second operand 3 states and 264 transitions. [2023-11-06 22:54:52,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 16 transitions, 67 flow [2023-11-06 22:54:52,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 16 transitions, 66 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:54:52,499 INFO L231 Difference]: Finished difference. Result has 22 places, 16 transitions, 40 flow [2023-11-06 22:54:52,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=40, PETRI_PLACES=22, PETRI_TRANSITIONS=16} [2023-11-06 22:54:52,500 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-11-06 22:54:52,500 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 16 transitions, 40 flow [2023-11-06 22:54:52,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:52,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:54:52,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 22:54:52,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 22:54:52,501 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 22:54:52,502 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:54:52,502 INFO L85 PathProgramCache]: Analyzing trace with hash 382531937, now seen corresponding path program 1 times [2023-11-06 22:54:52,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:54:52,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344500178] [2023-11-06 22:54:52,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:54:52,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:54:52,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:54:52,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:54:52,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:54:52,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344500178] [2023-11-06 22:54:52,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344500178] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:54:52,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:54:52,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:54:52,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032532786] [2023-11-06 22:54:52,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:54:52,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:54:52,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:54:52,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:54:52,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:54:52,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 200 [2023-11-06 22:54:52,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 16 transitions, 40 flow. Second operand has 4 states, 4 states have (on average 79.25) internal successors, (317), 4 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:52,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:54:52,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 200 [2023-11-06 22:54:52,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:54:52,696 INFO L124 PetriNetUnfolderBase]: 44/77 cut-off events. [2023-11-06 22:54:52,696 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:54:52,697 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 22:54:52,698 INFO L140 encePairwiseOnDemand]: 198/200 looper letters, 12 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2023-11-06 22:54:52,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 15 transitions, 64 flow [2023-11-06 22:54:52,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:54:52,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:54:52,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 248 transitions. [2023-11-06 22:54:52,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41333333333333333 [2023-11-06 22:54:52,700 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 248 transitions. [2023-11-06 22:54:52,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 248 transitions. [2023-11-06 22:54:52,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:54:52,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 248 transitions. [2023-11-06 22:54:52,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:52,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:52,704 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:52,704 INFO L175 Difference]: Start difference. First operand has 22 places, 16 transitions, 40 flow. Second operand 3 states and 248 transitions. [2023-11-06 22:54:52,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 15 transitions, 64 flow [2023-11-06 22:54:52,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 15 transitions, 63 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:54:52,705 INFO L231 Difference]: Finished difference. Result has 22 places, 15 transitions, 39 flow [2023-11-06 22:54:52,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=37, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=39, PETRI_PLACES=22, PETRI_TRANSITIONS=15} [2023-11-06 22:54:52,706 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-11-06 22:54:52,706 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 15 transitions, 39 flow [2023-11-06 22:54:52,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.25) internal successors, (317), 4 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:52,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:54:52,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:54:52,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 22:54:52,707 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:54:52,708 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:54:52,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1627154996, now seen corresponding path program 1 times [2023-11-06 22:54:52,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:54:52,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82902531] [2023-11-06 22:54:52,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:54:52,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:54:52,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:54:52,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:54:52,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:54:52,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82902531] [2023-11-06 22:54:52,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82902531] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:54:52,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:54:52,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:54:52,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671274519] [2023-11-06 22:54:52,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:54:52,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:54:52,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:54:52,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:54:52,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:54:52,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 200 [2023-11-06 22:54:52,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 15 transitions, 39 flow. Second operand has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:52,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:54:52,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 200 [2023-11-06 22:54:52,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:54:52,874 INFO L124 PetriNetUnfolderBase]: 49/94 cut-off events. [2023-11-06 22:54:52,874 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:54:52,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198 conditions, 94 events. 49/94 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 273 event pairs, 13 based on Foata normal form. 1/69 useless extension candidates. Maximal degree in co-relation 194. Up to 65 conditions per place. [2023-11-06 22:54:52,875 INFO L140 encePairwiseOnDemand]: 196/200 looper letters, 16 selfloop transitions, 2 changer transitions 4/24 dead transitions. [2023-11-06 22:54:52,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 24 transitions, 104 flow [2023-11-06 22:54:52,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:54:52,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:54:52,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 294 transitions. [2023-11-06 22:54:52,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49 [2023-11-06 22:54:52,878 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 294 transitions. [2023-11-06 22:54:52,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 294 transitions. [2023-11-06 22:54:52,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:54:52,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 294 transitions. [2023-11-06 22:54:52,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:52,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:52,882 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:52,882 INFO L175 Difference]: Start difference. First operand has 22 places, 15 transitions, 39 flow. Second operand 3 states and 294 transitions. [2023-11-06 22:54:52,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 24 transitions, 104 flow [2023-11-06 22:54:52,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 24 transitions, 103 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:54:52,884 INFO L231 Difference]: Finished difference. Result has 24 places, 16 transitions, 52 flow [2023-11-06 22:54:52,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=24, PETRI_TRANSITIONS=16} [2023-11-06 22:54:52,885 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -5 predicate places. [2023-11-06 22:54:52,885 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 16 transitions, 52 flow [2023-11-06 22:54:52,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:52,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:54:52,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:54:52,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 22:54:52,886 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:54:52,886 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:54:52,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1012727365, now seen corresponding path program 1 times [2023-11-06 22:54:52,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:54:52,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502874433] [2023-11-06 22:54:52,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:54:52,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:54:52,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:54:53,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:54:53,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:54:53,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502874433] [2023-11-06 22:54:53,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502874433] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:54:53,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:54:53,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:54:53,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278848271] [2023-11-06 22:54:53,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:54:53,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:54:53,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:54:53,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:54:53,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:54:53,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 200 [2023-11-06 22:54:53,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 16 transitions, 52 flow. Second operand has 5 states, 5 states have (on average 83.8) internal successors, (419), 5 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:53,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:54:53,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 200 [2023-11-06 22:54:53,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:54:53,220 INFO L124 PetriNetUnfolderBase]: 73/145 cut-off events. [2023-11-06 22:54:53,220 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2023-11-06 22:54:53,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 342 conditions, 145 events. 73/145 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 437 event pairs, 24 based on Foata normal form. 6/151 useless extension candidates. Maximal degree in co-relation 337. Up to 78 conditions per place. [2023-11-06 22:54:53,227 INFO L140 encePairwiseOnDemand]: 194/200 looper letters, 28 selfloop transitions, 3 changer transitions 3/34 dead transitions. [2023-11-06 22:54:53,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 34 transitions, 168 flow [2023-11-06 22:54:53,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:54:53,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:54:53,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 439 transitions. [2023-11-06 22:54:53,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.439 [2023-11-06 22:54:53,231 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 439 transitions. [2023-11-06 22:54:53,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 439 transitions. [2023-11-06 22:54:53,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:54:53,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 439 transitions. [2023-11-06 22:54:53,233 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 87.8) internal successors, (439), 5 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:53,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 200.0) internal successors, (1200), 6 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:53,237 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 200.0) internal successors, (1200), 6 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:53,237 INFO L175 Difference]: Start difference. First operand has 24 places, 16 transitions, 52 flow. Second operand 5 states and 439 transitions. [2023-11-06 22:54:53,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 34 transitions, 168 flow [2023-11-06 22:54:53,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 34 transitions, 165 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:54:53,239 INFO L231 Difference]: Finished difference. Result has 30 places, 18 transitions, 80 flow [2023-11-06 22:54:53,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=80, PETRI_PLACES=30, PETRI_TRANSITIONS=18} [2023-11-06 22:54:53,240 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 1 predicate places. [2023-11-06 22:54:53,241 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 18 transitions, 80 flow [2023-11-06 22:54:53,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 83.8) internal successors, (419), 5 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:53,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:54:53,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:54:53,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 22:54:53,242 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:54:53,242 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:54:53,242 INFO L85 PathProgramCache]: Analyzing trace with hash 261851149, now seen corresponding path program 2 times [2023-11-06 22:54:53,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:54:53,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312831562] [2023-11-06 22:54:53,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:54:53,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:54:53,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:54:53,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:54:53,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:54:53,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312831562] [2023-11-06 22:54:53,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312831562] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:54:53,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966199986] [2023-11-06 22:54:53,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:54:53,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:54:53,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:54:53,391 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:54:53,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:54:53,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:54:53,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:54:53,496 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:54:53,500 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:54:53,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:54:53,607 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:54:53,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:54:53,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966199986] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:54:53,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:54:53,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2023-11-06 22:54:53,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709706405] [2023-11-06 22:54:53,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:54:53,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:54:53,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:54:53,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:54:53,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:54:53,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 200 [2023-11-06 22:54:53,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 18 transitions, 80 flow. Second operand has 4 states, 4 states have (on average 87.25) internal successors, (349), 4 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:53,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:54:53,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 200 [2023-11-06 22:54:53,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:54:53,799 INFO L124 PetriNetUnfolderBase]: 72/143 cut-off events. [2023-11-06 22:54:53,800 INFO L125 PetriNetUnfolderBase]: For 158/163 co-relation queries the response was YES. [2023-11-06 22:54:53,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 464 conditions, 143 events. 72/143 cut-off events. For 158/163 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 427 event pairs, 28 based on Foata normal form. 6/147 useless extension candidates. Maximal degree in co-relation 456. Up to 86 conditions per place. [2023-11-06 22:54:53,802 INFO L140 encePairwiseOnDemand]: 196/200 looper letters, 24 selfloop transitions, 3 changer transitions 5/33 dead transitions. [2023-11-06 22:54:53,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 33 transitions, 198 flow [2023-11-06 22:54:53,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:54:53,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:54:53,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 367 transitions. [2023-11-06 22:54:53,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45875 [2023-11-06 22:54:53,805 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 367 transitions. [2023-11-06 22:54:53,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 367 transitions. [2023-11-06 22:54:53,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:54:53,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 367 transitions. [2023-11-06 22:54:53,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 91.75) internal successors, (367), 4 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:53,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 200.0) internal successors, (1000), 5 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:53,810 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 200.0) internal successors, (1000), 5 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:53,810 INFO L175 Difference]: Start difference. First operand has 30 places, 18 transitions, 80 flow. Second operand 4 states and 367 transitions. [2023-11-06 22:54:53,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 33 transitions, 198 flow [2023-11-06 22:54:53,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 33 transitions, 182 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-11-06 22:54:53,814 INFO L231 Difference]: Finished difference. Result has 32 places, 20 transitions, 97 flow [2023-11-06 22:54:53,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=97, PETRI_PLACES=32, PETRI_TRANSITIONS=20} [2023-11-06 22:54:53,815 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 3 predicate places. [2023-11-06 22:54:53,815 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 20 transitions, 97 flow [2023-11-06 22:54:53,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 87.25) internal successors, (349), 4 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:53,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:54:53,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:54:53,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:54:54,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:54:54,023 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:54:54,023 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:54:54,023 INFO L85 PathProgramCache]: Analyzing trace with hash -500725227, now seen corresponding path program 3 times [2023-11-06 22:54:54,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:54:54,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345938709] [2023-11-06 22:54:54,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:54:54,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:54:54,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:54:54,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:54:54,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:54:54,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345938709] [2023-11-06 22:54:54,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345938709] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:54:54,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096076978] [2023-11-06 22:54:54,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:54:54,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:54:54,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:54:54,156 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:54:54,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:54:54,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:54:54,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:54:54,265 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:54:54,267 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:54:54,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:54:54,308 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:54:54,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:54:54,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096076978] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:54:54,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:54:54,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2023-11-06 22:54:54,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794133090] [2023-11-06 22:54:54,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:54:54,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:54:54,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:54:54,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:54:54,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:54:54,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 200 [2023-11-06 22:54:54,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 20 transitions, 97 flow. Second operand has 7 states, 7 states have (on average 82.71428571428571) internal successors, (579), 7 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:54,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:54:54,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 200 [2023-11-06 22:54:54,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:54:54,664 INFO L124 PetriNetUnfolderBase]: 105/203 cut-off events. [2023-11-06 22:54:54,664 INFO L125 PetriNetUnfolderBase]: For 312/312 co-relation queries the response was YES. [2023-11-06 22:54:54,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 674 conditions, 203 events. 105/203 cut-off events. For 312/312 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 675 event pairs, 35 based on Foata normal form. 6/209 useless extension candidates. Maximal degree in co-relation 665. Up to 144 conditions per place. [2023-11-06 22:54:54,666 INFO L140 encePairwiseOnDemand]: 194/200 looper letters, 33 selfloop transitions, 14 changer transitions 5/52 dead transitions. [2023-11-06 22:54:54,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 52 transitions, 334 flow [2023-11-06 22:54:54,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:54:54,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 22:54:54,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 689 transitions. [2023-11-06 22:54:54,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430625 [2023-11-06 22:54:54,671 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 689 transitions. [2023-11-06 22:54:54,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 689 transitions. [2023-11-06 22:54:54,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:54:54,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 689 transitions. [2023-11-06 22:54:54,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 86.125) internal successors, (689), 8 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:54,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 200.0) internal successors, (1800), 9 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:54,679 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 200.0) internal successors, (1800), 9 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:54,679 INFO L175 Difference]: Start difference. First operand has 32 places, 20 transitions, 97 flow. Second operand 8 states and 689 transitions. [2023-11-06 22:54:54,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 52 transitions, 334 flow [2023-11-06 22:54:54,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 52 transitions, 332 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:54:54,687 INFO L231 Difference]: Finished difference. Result has 43 places, 30 transitions, 219 flow [2023-11-06 22:54:54,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=219, PETRI_PLACES=43, PETRI_TRANSITIONS=30} [2023-11-06 22:54:54,689 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 14 predicate places. [2023-11-06 22:54:54,689 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 30 transitions, 219 flow [2023-11-06 22:54:54,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 82.71428571428571) internal successors, (579), 7 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:54,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:54:54,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:54:54,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:54:54,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:54:54,896 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:54:54,896 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:54:54,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1817721243, now seen corresponding path program 4 times [2023-11-06 22:54:54,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:54:54,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739636948] [2023-11-06 22:54:54,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:54:54,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:54:54,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:54:55,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:54:55,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:54:55,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739636948] [2023-11-06 22:54:55,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739636948] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:54:55,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388581943] [2023-11-06 22:54:55,029 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:54:55,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:54:55,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:54:55,031 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:54:55,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:54:55,113 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:54:55,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:54:55,115 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:54:55,116 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:54:55,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:54:55,182 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:54:55,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:54:55,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388581943] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:54:55,242 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:54:55,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-11-06 22:54:55,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356000142] [2023-11-06 22:54:55,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:54:55,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:54:55,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:54:55,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:54:55,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:54:55,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 200 [2023-11-06 22:54:55,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 30 transitions, 219 flow. Second operand has 8 states, 8 states have (on average 82.625) internal successors, (661), 8 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:55,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:54:55,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 200 [2023-11-06 22:54:55,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:54:55,446 INFO L124 PetriNetUnfolderBase]: 78/147 cut-off events. [2023-11-06 22:54:55,446 INFO L125 PetriNetUnfolderBase]: For 541/541 co-relation queries the response was YES. [2023-11-06 22:54:55,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 661 conditions, 147 events. 78/147 cut-off events. For 541/541 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 393 event pairs, 22 based on Foata normal form. 6/153 useless extension candidates. Maximal degree in co-relation 647. Up to 94 conditions per place. [2023-11-06 22:54:55,448 INFO L140 encePairwiseOnDemand]: 195/200 looper letters, 26 selfloop transitions, 13 changer transitions 1/40 dead transitions. [2023-11-06 22:54:55,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 40 transitions, 344 flow [2023-11-06 22:54:55,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:54:55,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:54:55,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 432 transitions. [2023-11-06 22:54:55,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.432 [2023-11-06 22:54:55,451 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 432 transitions. [2023-11-06 22:54:55,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 432 transitions. [2023-11-06 22:54:55,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:54:55,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 432 transitions. [2023-11-06 22:54:55,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 86.4) internal successors, (432), 5 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:55,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 200.0) internal successors, (1200), 6 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:55,456 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 200.0) internal successors, (1200), 6 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:55,457 INFO L175 Difference]: Start difference. First operand has 43 places, 30 transitions, 219 flow. Second operand 5 states and 432 transitions. [2023-11-06 22:54:55,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 40 transitions, 344 flow [2023-11-06 22:54:55,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 40 transitions, 314 flow, removed 13 selfloop flow, removed 1 redundant places. [2023-11-06 22:54:55,462 INFO L231 Difference]: Finished difference. Result has 47 places, 30 transitions, 218 flow [2023-11-06 22:54:55,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=218, PETRI_PLACES=47, PETRI_TRANSITIONS=30} [2023-11-06 22:54:55,462 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 18 predicate places. [2023-11-06 22:54:55,463 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 30 transitions, 218 flow [2023-11-06 22:54:55,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 82.625) internal successors, (661), 8 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:55,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:54:55,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:54:55,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:54:55,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:54:55,664 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:54:55,665 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:54:55,665 INFO L85 PathProgramCache]: Analyzing trace with hash -316479383, now seen corresponding path program 1 times [2023-11-06 22:54:55,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:54:55,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432837104] [2023-11-06 22:54:55,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:54:55,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:54:55,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:54:55,779 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 22:54:55,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:54:55,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432837104] [2023-11-06 22:54:55,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432837104] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:54:55,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941427691] [2023-11-06 22:54:55,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:54:55,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:54:55,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:54:55,782 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:54:55,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:54:55,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:54:55,864 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:54:55,866 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:54:55,904 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 22:54:55,904 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:54:55,985 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 22:54:55,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941427691] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:54:55,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:54:55,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-06 22:54:55,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780800482] [2023-11-06 22:54:55,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:54:55,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:54:55,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:54:55,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:54:55,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:54:56,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 200 [2023-11-06 22:54:56,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 30 transitions, 218 flow. Second operand has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:56,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:54:56,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 200 [2023-11-06 22:54:56,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:54:56,179 INFO L124 PetriNetUnfolderBase]: 132/253 cut-off events. [2023-11-06 22:54:56,179 INFO L125 PetriNetUnfolderBase]: For 786/799 co-relation queries the response was YES. [2023-11-06 22:54:56,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1102 conditions, 253 events. 132/253 cut-off events. For 786/799 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 931 event pairs, 12 based on Foata normal form. 20/273 useless extension candidates. Maximal degree in co-relation 1086. Up to 120 conditions per place. [2023-11-06 22:54:56,182 INFO L140 encePairwiseOnDemand]: 195/200 looper letters, 37 selfloop transitions, 13 changer transitions 6/59 dead transitions. [2023-11-06 22:54:56,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 59 transitions, 474 flow [2023-11-06 22:54:56,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:54:56,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:54:56,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 460 transitions. [2023-11-06 22:54:56,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46 [2023-11-06 22:54:56,186 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 460 transitions. [2023-11-06 22:54:56,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 460 transitions. [2023-11-06 22:54:56,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:54:56,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 460 transitions. [2023-11-06 22:54:56,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 92.0) internal successors, (460), 5 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:56,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 200.0) internal successors, (1200), 6 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:56,192 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 200.0) internal successors, (1200), 6 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:56,192 INFO L175 Difference]: Start difference. First operand has 47 places, 30 transitions, 218 flow. Second operand 5 states and 460 transitions. [2023-11-06 22:54:56,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 59 transitions, 474 flow [2023-11-06 22:54:56,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 59 transitions, 444 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-11-06 22:54:56,197 INFO L231 Difference]: Finished difference. Result has 49 places, 37 transitions, 312 flow [2023-11-06 22:54:56,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=312, PETRI_PLACES=49, PETRI_TRANSITIONS=37} [2023-11-06 22:54:56,198 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 20 predicate places. [2023-11-06 22:54:56,198 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 37 transitions, 312 flow [2023-11-06 22:54:56,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 88.0) internal successors, (704), 8 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:56,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:54:56,199 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:54:56,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:54:56,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:54:56,406 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:54:56,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:54:56,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1403603274, now seen corresponding path program 2 times [2023-11-06 22:54:56,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:54:56,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400888268] [2023-11-06 22:54:56,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:54:56,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:54:56,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:54:56,578 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:54:56,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:54:56,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400888268] [2023-11-06 22:54:56,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400888268] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:54:56,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973298528] [2023-11-06 22:54:56,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:54:56,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:54:56,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:54:56,580 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:54:56,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:54:56,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:54:56,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:54:56,684 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:54:56,686 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:54:56,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:54:56,766 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:54:56,878 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:54:56,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973298528] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:54:56,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:54:56,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-11-06 22:54:56,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973935844] [2023-11-06 22:54:56,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:54:56,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:54:56,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:54:56,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:54:56,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:54:57,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 200 [2023-11-06 22:54:57,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 37 transitions, 312 flow. Second operand has 14 states, 14 states have (on average 82.07142857142857) internal successors, (1149), 14 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:57,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:54:57,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 200 [2023-11-06 22:54:57,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:54:57,688 INFO L124 PetriNetUnfolderBase]: 260/444 cut-off events. [2023-11-06 22:54:57,689 INFO L125 PetriNetUnfolderBase]: For 1434/1434 co-relation queries the response was YES. [2023-11-06 22:54:57,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2098 conditions, 444 events. 260/444 cut-off events. For 1434/1434 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1675 event pairs, 24 based on Foata normal form. 14/458 useless extension candidates. Maximal degree in co-relation 2081. Up to 183 conditions per place. [2023-11-06 22:54:57,694 INFO L140 encePairwiseOnDemand]: 194/200 looper letters, 55 selfloop transitions, 61 changer transitions 11/127 dead transitions. [2023-11-06 22:54:57,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 127 transitions, 1193 flow [2023-11-06 22:54:57,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 22:54:57,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-06 22:54:57,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1614 transitions. [2023-11-06 22:54:57,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42473684210526313 [2023-11-06 22:54:57,702 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1614 transitions. [2023-11-06 22:54:57,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1614 transitions. [2023-11-06 22:54:57,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:54:57,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1614 transitions. [2023-11-06 22:54:57,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 84.94736842105263) internal successors, (1614), 19 states have internal predecessors, (1614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:57,717 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 200.0) internal successors, (4000), 20 states have internal predecessors, (4000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:57,719 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 200.0) internal successors, (4000), 20 states have internal predecessors, (4000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:57,720 INFO L175 Difference]: Start difference. First operand has 49 places, 37 transitions, 312 flow. Second operand 19 states and 1614 transitions. [2023-11-06 22:54:57,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 127 transitions, 1193 flow [2023-11-06 22:54:57,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 127 transitions, 1152 flow, removed 18 selfloop flow, removed 1 redundant places. [2023-11-06 22:54:57,730 INFO L231 Difference]: Finished difference. Result has 72 places, 82 transitions, 893 flow [2023-11-06 22:54:57,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=893, PETRI_PLACES=72, PETRI_TRANSITIONS=82} [2023-11-06 22:54:57,731 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 43 predicate places. [2023-11-06 22:54:57,731 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 82 transitions, 893 flow [2023-11-06 22:54:57,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 82.07142857142857) internal successors, (1149), 14 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:57,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:54:57,732 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:54:57,742 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-06 22:54:57,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:54:57,938 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:54:57,939 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:54:57,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1638963254, now seen corresponding path program 3 times [2023-11-06 22:54:57,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:54:57,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768387346] [2023-11-06 22:54:57,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:54:57,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:54:57,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:54:58,109 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:54:58,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:54:58,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768387346] [2023-11-06 22:54:58,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768387346] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:54:58,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063588456] [2023-11-06 22:54:58,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:54:58,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:54:58,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:54:58,112 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:54:58,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:54:58,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:54:58,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:54:58,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:54:58,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:54:58,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:54:58,343 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:54:58,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:54:58,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063588456] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:54:58,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:54:58,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2023-11-06 22:54:58,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654265567] [2023-11-06 22:54:58,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:54:58,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:54:58,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:54:58,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:54:58,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:54:58,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 200 [2023-11-06 22:54:58,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 82 transitions, 893 flow. Second operand has 12 states, 12 states have (on average 82.5) internal successors, (990), 12 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:58,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:54:58,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 200 [2023-11-06 22:54:58,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:54:59,064 INFO L124 PetriNetUnfolderBase]: 256/432 cut-off events. [2023-11-06 22:54:59,064 INFO L125 PetriNetUnfolderBase]: For 2122/2122 co-relation queries the response was YES. [2023-11-06 22:54:59,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2524 conditions, 432 events. 256/432 cut-off events. For 2122/2122 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1544 event pairs, 3 based on Foata normal form. 10/442 useless extension candidates. Maximal degree in co-relation 2500. Up to 175 conditions per place. [2023-11-06 22:54:59,071 INFO L140 encePairwiseOnDemand]: 194/200 looper letters, 79 selfloop transitions, 50 changer transitions 1/130 dead transitions. [2023-11-06 22:54:59,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 130 transitions, 1498 flow [2023-11-06 22:54:59,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:54:59,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-06 22:54:59,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1112 transitions. [2023-11-06 22:54:59,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4276923076923077 [2023-11-06 22:54:59,077 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1112 transitions. [2023-11-06 22:54:59,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1112 transitions. [2023-11-06 22:54:59,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:54:59,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1112 transitions. [2023-11-06 22:54:59,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 85.53846153846153) internal successors, (1112), 13 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:59,088 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 200.0) internal successors, (2800), 14 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:59,089 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 200.0) internal successors, (2800), 14 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:59,089 INFO L175 Difference]: Start difference. First operand has 72 places, 82 transitions, 893 flow. Second operand 13 states and 1112 transitions. [2023-11-06 22:54:59,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 130 transitions, 1498 flow [2023-11-06 22:54:59,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 130 transitions, 1192 flow, removed 146 selfloop flow, removed 4 redundant places. [2023-11-06 22:54:59,111 INFO L231 Difference]: Finished difference. Result has 84 places, 93 transitions, 890 flow [2023-11-06 22:54:59,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=655, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=890, PETRI_PLACES=84, PETRI_TRANSITIONS=93} [2023-11-06 22:54:59,112 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 55 predicate places. [2023-11-06 22:54:59,113 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 93 transitions, 890 flow [2023-11-06 22:54:59,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 82.5) internal successors, (990), 12 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:59,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:54:59,113 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:54:59,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:54:59,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 22:54:59,327 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:54:59,327 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:54:59,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1581135938, now seen corresponding path program 4 times [2023-11-06 22:54:59,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:54:59,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538789584] [2023-11-06 22:54:59,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:54:59,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:54:59,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:54:59,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:54:59,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:54:59,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538789584] [2023-11-06 22:54:59,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538789584] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:54:59,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089502936] [2023-11-06 22:54:59,494 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:54:59,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:54:59,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:54:59,495 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:54:59,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:54:59,579 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:54:59,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:54:59,581 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:54:59,582 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:54:59,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:54:59,665 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:54:59,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:54:59,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089502936] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:54:59,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:54:59,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-11-06 22:54:59,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588481811] [2023-11-06 22:54:59,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:54:59,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:54:59,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:54:59,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:54:59,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:54:59,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 200 [2023-11-06 22:54:59,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 93 transitions, 890 flow. Second operand has 14 states, 14 states have (on average 82.0) internal successors, (1148), 14 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:54:59,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:54:59,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 200 [2023-11-06 22:54:59,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:55:00,661 INFO L124 PetriNetUnfolderBase]: 316/530 cut-off events. [2023-11-06 22:55:00,661 INFO L125 PetriNetUnfolderBase]: For 2969/2969 co-relation queries the response was YES. [2023-11-06 22:55:00,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2740 conditions, 530 events. 316/530 cut-off events. For 2969/2969 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2007 event pairs, 23 based on Foata normal form. 24/554 useless extension candidates. Maximal degree in co-relation 2712. Up to 184 conditions per place. [2023-11-06 22:55:00,669 INFO L140 encePairwiseOnDemand]: 194/200 looper letters, 90 selfloop transitions, 76 changer transitions 1/167 dead transitions. [2023-11-06 22:55:00,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 167 transitions, 1707 flow [2023-11-06 22:55:00,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 22:55:00,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-06 22:55:00,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1704 transitions. [2023-11-06 22:55:00,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.426 [2023-11-06 22:55:00,677 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1704 transitions. [2023-11-06 22:55:00,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1704 transitions. [2023-11-06 22:55:00,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:55:00,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1704 transitions. [2023-11-06 22:55:00,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 85.2) internal successors, (1704), 20 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:00,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 200.0) internal successors, (4200), 21 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:00,695 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 200.0) internal successors, (4200), 21 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:00,695 INFO L175 Difference]: Start difference. First operand has 84 places, 93 transitions, 890 flow. Second operand 20 states and 1704 transitions. [2023-11-06 22:55:00,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 167 transitions, 1707 flow [2023-11-06 22:55:00,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 167 transitions, 1620 flow, removed 36 selfloop flow, removed 3 redundant places. [2023-11-06 22:55:00,716 INFO L231 Difference]: Finished difference. Result has 108 places, 120 transitions, 1299 flow [2023-11-06 22:55:00,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=843, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1299, PETRI_PLACES=108, PETRI_TRANSITIONS=120} [2023-11-06 22:55:00,717 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 79 predicate places. [2023-11-06 22:55:00,717 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 120 transitions, 1299 flow [2023-11-06 22:55:00,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 82.0) internal successors, (1148), 14 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:00,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:55:00,718 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:55:00,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:55:00,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 22:55:00,924 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:55:00,925 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:55:00,925 INFO L85 PathProgramCache]: Analyzing trace with hash 475136934, now seen corresponding path program 5 times [2023-11-06 22:55:00,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:55:00,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229633266] [2023-11-06 22:55:00,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:00,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:55:00,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:01,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:01,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:55:01,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229633266] [2023-11-06 22:55:01,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229633266] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:55:01,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233844544] [2023-11-06 22:55:01,139 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:55:01,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:01,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:55:01,141 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:55:01,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:55:01,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:55:01,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:55:01,240 INFO L262 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:55:01,241 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:55:01,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:01,349 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:55:01,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:01,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233844544] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:55:01,457 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:55:01,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2023-11-06 22:55:01,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396029647] [2023-11-06 22:55:01,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:55:01,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:55:01,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:55:01,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:55:01,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:55:01,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 200 [2023-11-06 22:55:01,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 120 transitions, 1299 flow. Second operand has 14 states, 14 states have (on average 81.85714285714286) internal successors, (1146), 14 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:01,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:55:01,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 200 [2023-11-06 22:55:01,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:55:02,216 INFO L124 PetriNetUnfolderBase]: 383/668 cut-off events. [2023-11-06 22:55:02,216 INFO L125 PetriNetUnfolderBase]: For 5876/5876 co-relation queries the response was YES. [2023-11-06 22:55:02,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3891 conditions, 668 events. 383/668 cut-off events. For 5876/5876 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2849 event pairs, 32 based on Foata normal form. 26/694 useless extension candidates. Maximal degree in co-relation 3855. Up to 209 conditions per place. [2023-11-06 22:55:02,226 INFO L140 encePairwiseOnDemand]: 194/200 looper letters, 87 selfloop transitions, 92 changer transitions 8/187 dead transitions. [2023-11-06 22:55:02,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 187 transitions, 2199 flow [2023-11-06 22:55:02,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 22:55:02,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-06 22:55:02,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1362 transitions. [2023-11-06 22:55:02,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425625 [2023-11-06 22:55:02,234 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1362 transitions. [2023-11-06 22:55:02,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1362 transitions. [2023-11-06 22:55:02,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:55:02,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1362 transitions. [2023-11-06 22:55:02,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 85.125) internal successors, (1362), 16 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:02,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 200.0) internal successors, (3400), 17 states have internal predecessors, (3400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:02,248 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 200.0) internal successors, (3400), 17 states have internal predecessors, (3400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:02,248 INFO L175 Difference]: Start difference. First operand has 108 places, 120 transitions, 1299 flow. Second operand 16 states and 1362 transitions. [2023-11-06 22:55:02,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 187 transitions, 2199 flow [2023-11-06 22:55:02,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 187 transitions, 1995 flow, removed 73 selfloop flow, removed 7 redundant places. [2023-11-06 22:55:02,290 INFO L231 Difference]: Finished difference. Result has 121 places, 138 transitions, 1616 flow [2023-11-06 22:55:02,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=1142, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1616, PETRI_PLACES=121, PETRI_TRANSITIONS=138} [2023-11-06 22:55:02,292 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 92 predicate places. [2023-11-06 22:55:02,292 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 138 transitions, 1616 flow [2023-11-06 22:55:02,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 81.85714285714286) internal successors, (1146), 14 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:02,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:55:02,293 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:55:02,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:55:02,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 22:55:02,499 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:55:02,499 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:55:02,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1852816762, now seen corresponding path program 6 times [2023-11-06 22:55:02,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:55:02,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907799375] [2023-11-06 22:55:02,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:02,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:55:02,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:02,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:02,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:55:02,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907799375] [2023-11-06 22:55:02,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907799375] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:55:02,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377700065] [2023-11-06 22:55:02,704 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:55:02,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:02,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:55:02,706 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:55:02,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:55:02,793 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-06 22:55:02,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:55:02,794 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:55:02,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:55:02,891 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:02,891 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:55:02,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:02,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377700065] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:55:02,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:55:02,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2023-11-06 22:55:02,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535858373] [2023-11-06 22:55:02,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:55:03,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:55:03,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:55:03,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:55:03,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:55:03,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 200 [2023-11-06 22:55:03,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 138 transitions, 1616 flow. Second operand has 15 states, 15 states have (on average 82.66666666666667) internal successors, (1240), 15 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:03,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:55:03,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 200 [2023-11-06 22:55:03,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:55:04,008 INFO L124 PetriNetUnfolderBase]: 536/916 cut-off events. [2023-11-06 22:55:04,008 INFO L125 PetriNetUnfolderBase]: For 10776/10776 co-relation queries the response was YES. [2023-11-06 22:55:04,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5891 conditions, 916 events. 536/916 cut-off events. For 10776/10776 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4194 event pairs, 85 based on Foata normal form. 40/956 useless extension candidates. Maximal degree in co-relation 5851. Up to 556 conditions per place. [2023-11-06 22:55:04,024 INFO L140 encePairwiseOnDemand]: 194/200 looper letters, 163 selfloop transitions, 111 changer transitions 3/277 dead transitions. [2023-11-06 22:55:04,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 277 transitions, 3592 flow [2023-11-06 22:55:04,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 22:55:04,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-06 22:55:04,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2042 transitions. [2023-11-06 22:55:04,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42541666666666667 [2023-11-06 22:55:04,030 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2042 transitions. [2023-11-06 22:55:04,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2042 transitions. [2023-11-06 22:55:04,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:55:04,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2042 transitions. [2023-11-06 22:55:04,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 85.08333333333333) internal successors, (2042), 24 states have internal predecessors, (2042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:04,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 200.0) internal successors, (5000), 25 states have internal predecessors, (5000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:04,047 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 200.0) internal successors, (5000), 25 states have internal predecessors, (5000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:04,047 INFO L175 Difference]: Start difference. First operand has 121 places, 138 transitions, 1616 flow. Second operand 24 states and 2042 transitions. [2023-11-06 22:55:04,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 277 transitions, 3592 flow [2023-11-06 22:55:04,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 277 transitions, 3344 flow, removed 75 selfloop flow, removed 6 redundant places. [2023-11-06 22:55:04,110 INFO L231 Difference]: Finished difference. Result has 147 places, 203 transitions, 2800 flow [2023-11-06 22:55:04,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=1480, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2800, PETRI_PLACES=147, PETRI_TRANSITIONS=203} [2023-11-06 22:55:04,111 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 118 predicate places. [2023-11-06 22:55:04,111 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 203 transitions, 2800 flow [2023-11-06 22:55:04,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 82.66666666666667) internal successors, (1240), 15 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:04,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:55:04,113 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:55:04,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:55:04,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 22:55:04,320 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:55:04,320 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:55:04,320 INFO L85 PathProgramCache]: Analyzing trace with hash 215633594, now seen corresponding path program 7 times [2023-11-06 22:55:04,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:55:04,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937023549] [2023-11-06 22:55:04,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:04,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:55:04,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:04,473 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:04,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:55:04,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937023549] [2023-11-06 22:55:04,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937023549] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:55:04,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635575090] [2023-11-06 22:55:04,474 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:55:04,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:04,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:55:04,476 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:55:04,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:55:04,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:04,568 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:55:04,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:55:04,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:04,633 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:55:04,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:04,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635575090] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:55:04,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:55:04,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-11-06 22:55:04,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488179995] [2023-11-06 22:55:04,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:55:04,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:55:04,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:55:04,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:55:04,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:55:04,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 200 [2023-11-06 22:55:04,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 203 transitions, 2800 flow. Second operand has 14 states, 14 states have (on average 81.85714285714286) internal successors, (1146), 14 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:04,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:55:04,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 200 [2023-11-06 22:55:04,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:55:05,556 INFO L124 PetriNetUnfolderBase]: 593/1003 cut-off events. [2023-11-06 22:55:05,556 INFO L125 PetriNetUnfolderBase]: For 11435/11435 co-relation queries the response was YES. [2023-11-06 22:55:05,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7008 conditions, 1003 events. 593/1003 cut-off events. For 11435/11435 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 4608 event pairs, 93 based on Foata normal form. 12/1015 useless extension candidates. Maximal degree in co-relation 6961. Up to 636 conditions per place. [2023-11-06 22:55:05,574 INFO L140 encePairwiseOnDemand]: 194/200 looper letters, 112 selfloop transitions, 137 changer transitions 5/254 dead transitions. [2023-11-06 22:55:05,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 254 transitions, 3974 flow [2023-11-06 22:55:05,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:55:05,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-06 22:55:05,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1183 transitions. [2023-11-06 22:55:05,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4225 [2023-11-06 22:55:05,579 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1183 transitions. [2023-11-06 22:55:05,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1183 transitions. [2023-11-06 22:55:05,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:55:05,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1183 transitions. [2023-11-06 22:55:05,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 84.5) internal successors, (1183), 14 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:05,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 200.0) internal successors, (3000), 15 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:05,587 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 200.0) internal successors, (3000), 15 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:05,587 INFO L175 Difference]: Start difference. First operand has 147 places, 203 transitions, 2800 flow. Second operand 14 states and 1183 transitions. [2023-11-06 22:55:05,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 254 transitions, 3974 flow [2023-11-06 22:55:05,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 254 transitions, 3334 flow, removed 289 selfloop flow, removed 7 redundant places. [2023-11-06 22:55:05,676 INFO L231 Difference]: Finished difference. Result has 156 places, 232 transitions, 3185 flow [2023-11-06 22:55:05,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=2270, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3185, PETRI_PLACES=156, PETRI_TRANSITIONS=232} [2023-11-06 22:55:05,677 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 127 predicate places. [2023-11-06 22:55:05,678 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 232 transitions, 3185 flow [2023-11-06 22:55:05,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 81.85714285714286) internal successors, (1146), 14 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:05,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:55:05,678 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:55:05,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:55:05,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 22:55:05,884 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:55:05,884 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:55:05,885 INFO L85 PathProgramCache]: Analyzing trace with hash -644430228, now seen corresponding path program 8 times [2023-11-06 22:55:05,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:55:05,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546501897] [2023-11-06 22:55:05,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:05,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:55:05,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:06,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:06,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:55:06,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546501897] [2023-11-06 22:55:06,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546501897] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:55:06,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249568036] [2023-11-06 22:55:06,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:55:06,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:06,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:55:06,052 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:55:06,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:55:06,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:55:06,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:55:06,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:55:06,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:55:06,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:06,201 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:55:06,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:06,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249568036] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:55:06,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:55:06,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2023-11-06 22:55:06,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348195249] [2023-11-06 22:55:06,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:55:06,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:55:06,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:55:06,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:55:06,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:55:06,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 200 [2023-11-06 22:55:06,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 232 transitions, 3185 flow. Second operand has 15 states, 15 states have (on average 81.8) internal successors, (1227), 15 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:06,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:55:06,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 200 [2023-11-06 22:55:06,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:55:07,223 INFO L124 PetriNetUnfolderBase]: 577/1005 cut-off events. [2023-11-06 22:55:07,224 INFO L125 PetriNetUnfolderBase]: For 9205/9205 co-relation queries the response was YES. [2023-11-06 22:55:07,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6866 conditions, 1005 events. 577/1005 cut-off events. For 9205/9205 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 4708 event pairs, 82 based on Foata normal form. 28/1033 useless extension candidates. Maximal degree in co-relation 6815. Up to 557 conditions per place. [2023-11-06 22:55:07,245 INFO L140 encePairwiseOnDemand]: 194/200 looper letters, 110 selfloop transitions, 147 changer transitions 1/258 dead transitions. [2023-11-06 22:55:07,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 258 transitions, 3786 flow [2023-11-06 22:55:07,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 22:55:07,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-06 22:55:07,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1355 transitions. [2023-11-06 22:55:07,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4234375 [2023-11-06 22:55:07,252 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1355 transitions. [2023-11-06 22:55:07,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1355 transitions. [2023-11-06 22:55:07,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:55:07,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1355 transitions. [2023-11-06 22:55:07,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 84.6875) internal successors, (1355), 16 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:07,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 200.0) internal successors, (3400), 17 states have internal predecessors, (3400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:07,264 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 200.0) internal successors, (3400), 17 states have internal predecessors, (3400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:07,264 INFO L175 Difference]: Start difference. First operand has 156 places, 232 transitions, 3185 flow. Second operand 16 states and 1355 transitions. [2023-11-06 22:55:07,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 258 transitions, 3786 flow [2023-11-06 22:55:07,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 258 transitions, 3549 flow, removed 73 selfloop flow, removed 5 redundant places. [2023-11-06 22:55:07,366 INFO L231 Difference]: Finished difference. Result has 167 places, 230 transitions, 3264 flow [2023-11-06 22:55:07,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=2858, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3264, PETRI_PLACES=167, PETRI_TRANSITIONS=230} [2023-11-06 22:55:07,367 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 138 predicate places. [2023-11-06 22:55:07,367 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 230 transitions, 3264 flow [2023-11-06 22:55:07,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 81.8) internal successors, (1227), 15 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:07,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:55:07,368 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:55:07,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:55:07,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 22:55:07,574 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:55:07,575 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:55:07,575 INFO L85 PathProgramCache]: Analyzing trace with hash 735391872, now seen corresponding path program 9 times [2023-11-06 22:55:07,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:55:07,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928118746] [2023-11-06 22:55:07,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:07,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:55:07,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:07,762 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:07,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:55:07,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928118746] [2023-11-06 22:55:07,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928118746] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:55:07,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285796694] [2023-11-06 22:55:07,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:55:07,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:07,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:55:07,764 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:55:07,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:55:07,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 22:55:07,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:55:07,900 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 22:55:07,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:55:07,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:55:07,929 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:55:08,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:55:08,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285796694] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:55:08,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:55:08,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 7 [2023-11-06 22:55:08,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289903812] [2023-11-06 22:55:08,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:55:08,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 22:55:08,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:55:08,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 22:55:08,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:55:08,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 200 [2023-11-06 22:55:08,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 230 transitions, 3264 flow. Second operand has 9 states, 9 states have (on average 92.11111111111111) internal successors, (829), 9 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:08,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:55:08,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 200 [2023-11-06 22:55:08,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:55:08,552 INFO L124 PetriNetUnfolderBase]: 769/1365 cut-off events. [2023-11-06 22:55:08,552 INFO L125 PetriNetUnfolderBase]: For 14055/14063 co-relation queries the response was YES. [2023-11-06 22:55:08,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9690 conditions, 1365 events. 769/1365 cut-off events. For 14055/14063 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 7241 event pairs, 46 based on Foata normal form. 24/1387 useless extension candidates. Maximal degree in co-relation 9638. Up to 718 conditions per place. [2023-11-06 22:55:08,575 INFO L140 encePairwiseOnDemand]: 196/200 looper letters, 202 selfloop transitions, 95 changer transitions 40/345 dead transitions. [2023-11-06 22:55:08,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 345 transitions, 5445 flow [2023-11-06 22:55:08,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:55:08,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:55:08,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 486 transitions. [2023-11-06 22:55:08,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.486 [2023-11-06 22:55:08,577 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 486 transitions. [2023-11-06 22:55:08,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 486 transitions. [2023-11-06 22:55:08,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:55:08,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 486 transitions. [2023-11-06 22:55:08,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 97.2) internal successors, (486), 5 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:08,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 200.0) internal successors, (1200), 6 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:08,581 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 200.0) internal successors, (1200), 6 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:08,581 INFO L175 Difference]: Start difference. First operand has 167 places, 230 transitions, 3264 flow. Second operand 5 states and 486 transitions. [2023-11-06 22:55:08,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 345 transitions, 5445 flow [2023-11-06 22:55:08,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 345 transitions, 5020 flow, removed 44 selfloop flow, removed 13 redundant places. [2023-11-06 22:55:08,712 INFO L231 Difference]: Finished difference. Result has 161 places, 256 transitions, 3760 flow [2023-11-06 22:55:08,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=2948, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3760, PETRI_PLACES=161, PETRI_TRANSITIONS=256} [2023-11-06 22:55:08,713 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 132 predicate places. [2023-11-06 22:55:08,713 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 256 transitions, 3760 flow [2023-11-06 22:55:08,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 92.11111111111111) internal successors, (829), 9 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:08,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:55:08,714 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:55:08,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:55:08,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:08,919 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:55:08,919 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:55:08,920 INFO L85 PathProgramCache]: Analyzing trace with hash -546018395, now seen corresponding path program 10 times [2023-11-06 22:55:08,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:55:08,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484023339] [2023-11-06 22:55:08,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:08,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:55:08,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:09,120 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:09,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:55:09,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484023339] [2023-11-06 22:55:09,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484023339] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:55:09,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390448895] [2023-11-06 22:55:09,121 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:55:09,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:09,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:55:09,123 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:55:09,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:55:09,209 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:55:09,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:55:09,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:55:09,212 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:55:09,287 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:09,288 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:55:09,445 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:09,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390448895] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:55:09,446 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:55:09,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-11-06 22:55:09,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640171011] [2023-11-06 22:55:09,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:55:09,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:55:09,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:55:09,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:55:09,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:55:09,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 200 [2023-11-06 22:55:09,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 256 transitions, 3760 flow. Second operand has 15 states, 15 states have (on average 81.93333333333334) internal successors, (1229), 15 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:09,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:55:09,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 200 [2023-11-06 22:55:09,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:55:11,034 INFO L124 PetriNetUnfolderBase]: 1270/2124 cut-off events. [2023-11-06 22:55:11,034 INFO L125 PetriNetUnfolderBase]: For 18714/18714 co-relation queries the response was YES. [2023-11-06 22:55:11,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15645 conditions, 2124 events. 1270/2124 cut-off events. For 18714/18714 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 11411 event pairs, 23 based on Foata normal form. 20/2144 useless extension candidates. Maximal degree in co-relation 15591. Up to 840 conditions per place. [2023-11-06 22:55:11,079 INFO L140 encePairwiseOnDemand]: 194/200 looper letters, 288 selfloop transitions, 244 changer transitions 9/541 dead transitions. [2023-11-06 22:55:11,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 541 transitions, 8737 flow [2023-11-06 22:55:11,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-06 22:55:11,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-06 22:55:11,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1791 transitions. [2023-11-06 22:55:11,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42642857142857143 [2023-11-06 22:55:11,085 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1791 transitions. [2023-11-06 22:55:11,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1791 transitions. [2023-11-06 22:55:11,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:55:11,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1791 transitions. [2023-11-06 22:55:11,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 85.28571428571429) internal successors, (1791), 21 states have internal predecessors, (1791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:11,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 200.0) internal successors, (4400), 22 states have internal predecessors, (4400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:11,096 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 200.0) internal successors, (4400), 22 states have internal predecessors, (4400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:11,097 INFO L175 Difference]: Start difference. First operand has 161 places, 256 transitions, 3760 flow. Second operand 21 states and 1791 transitions. [2023-11-06 22:55:11,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 541 transitions, 8737 flow [2023-11-06 22:55:11,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 541 transitions, 8638 flow, removed 47 selfloop flow, removed 1 redundant places. [2023-11-06 22:55:11,299 INFO L231 Difference]: Finished difference. Result has 191 places, 421 transitions, 6982 flow [2023-11-06 22:55:11,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=3701, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=6982, PETRI_PLACES=191, PETRI_TRANSITIONS=421} [2023-11-06 22:55:11,299 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 162 predicate places. [2023-11-06 22:55:11,300 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 421 transitions, 6982 flow [2023-11-06 22:55:11,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 81.93333333333334) internal successors, (1229), 15 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:11,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:55:11,300 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:55:11,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:55:11,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:11,506 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:55:11,507 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:55:11,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1626341783, now seen corresponding path program 11 times [2023-11-06 22:55:11,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:55:11,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894549865] [2023-11-06 22:55:11,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:11,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:55:11,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:11,725 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:11,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:55:11,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894549865] [2023-11-06 22:55:11,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894549865] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:55:11,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220468837] [2023-11-06 22:55:11,726 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:55:11,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:11,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:55:11,731 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:55:11,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:55:11,828 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:55:11,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:55:11,829 INFO L262 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:55:11,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:55:11,988 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:11,989 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:55:12,182 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:12,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220468837] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:55:12,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:55:12,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2023-11-06 22:55:12,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286156009] [2023-11-06 22:55:12,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:55:12,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:55:12,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:55:12,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:55:12,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:55:12,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 200 [2023-11-06 22:55:12,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 421 transitions, 6982 flow. Second operand has 18 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 22:55:12,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:55:12,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 200 [2023-11-06 22:55:12,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:55:14,515 INFO L124 PetriNetUnfolderBase]: 1375/2315 cut-off events. [2023-11-06 22:55:14,515 INFO L125 PetriNetUnfolderBase]: For 35309/35309 co-relation queries the response was YES. [2023-11-06 22:55:14,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19468 conditions, 2315 events. 1375/2315 cut-off events. For 35309/35309 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 12872 event pairs, 91 based on Foata normal form. 34/2349 useless extension candidates. Maximal degree in co-relation 19403. Up to 854 conditions per place. [2023-11-06 22:55:14,546 INFO L140 encePairwiseOnDemand]: 194/200 looper letters, 287 selfloop transitions, 250 changer transitions 1/538 dead transitions. [2023-11-06 22:55:14,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 538 transitions, 9497 flow [2023-11-06 22:55:14,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-06 22:55:14,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-06 22:55:14,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2204 transitions. [2023-11-06 22:55:14,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238461538461539 [2023-11-06 22:55:14,553 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2204 transitions. [2023-11-06 22:55:14,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2204 transitions. [2023-11-06 22:55:14,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:55:14,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2204 transitions. [2023-11-06 22:55:14,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 84.76923076923077) internal successors, (2204), 26 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:14,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 200.0) internal successors, (5400), 27 states have internal predecessors, (5400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:14,569 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 200.0) internal successors, (5400), 27 states have internal predecessors, (5400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:14,570 INFO L175 Difference]: Start difference. First operand has 191 places, 421 transitions, 6982 flow. Second operand 26 states and 2204 transitions. [2023-11-06 22:55:14,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 538 transitions, 9497 flow [2023-11-06 22:55:14,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 538 transitions, 9072 flow, removed 192 selfloop flow, removed 4 redundant places. [2023-11-06 22:55:14,898 INFO L231 Difference]: Finished difference. Result has 221 places, 460 transitions, 8159 flow [2023-11-06 22:55:14,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=6679, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=8159, PETRI_PLACES=221, PETRI_TRANSITIONS=460} [2023-11-06 22:55:14,899 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 192 predicate places. [2023-11-06 22:55:14,899 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 460 transitions, 8159 flow [2023-11-06 22:55:14,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 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 22:55:14,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:55:14,900 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:55:14,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:55:15,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-06 22:55:15,107 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:55:15,107 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:55:15,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1884913603, now seen corresponding path program 12 times [2023-11-06 22:55:15,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:55:15,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203556028] [2023-11-06 22:55:15,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:15,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:55:15,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:15,499 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:15,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:55:15,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203556028] [2023-11-06 22:55:15,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203556028] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:55:15,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169348026] [2023-11-06 22:55:15,500 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:55:15,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:15,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:55:15,502 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:55:15,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:55:15,655 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-06 22:55:15,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:55:15,657 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:55:15,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:55:15,765 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:15,765 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:55:15,957 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:15,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169348026] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:55:15,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:55:15,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2023-11-06 22:55:15,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788999067] [2023-11-06 22:55:15,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:55:15,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-06 22:55:15,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:55:15,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-06 22:55:15,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2023-11-06 22:55:16,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 200 [2023-11-06 22:55:16,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 460 transitions, 8159 flow. Second operand has 22 states, 22 states have (on average 81.54545454545455) internal successors, (1794), 22 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:16,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:55:16,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 200 [2023-11-06 22:55:16,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:55:19,179 INFO L124 PetriNetUnfolderBase]: 1618/2664 cut-off events. [2023-11-06 22:55:19,180 INFO L125 PetriNetUnfolderBase]: For 48537/48537 co-relation queries the response was YES. [2023-11-06 22:55:19,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24161 conditions, 2664 events. 1618/2664 cut-off events. For 48537/48537 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 14819 event pairs, 152 based on Foata normal form. 26/2690 useless extension candidates. Maximal degree in co-relation 24087. Up to 1181 conditions per place. [2023-11-06 22:55:19,232 INFO L140 encePairwiseOnDemand]: 194/200 looper letters, 197 selfloop transitions, 490 changer transitions 17/704 dead transitions. [2023-11-06 22:55:19,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 704 transitions, 13883 flow [2023-11-06 22:55:19,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-06 22:55:19,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-11-06 22:55:19,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 3293 transitions. [2023-11-06 22:55:19,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42217948717948717 [2023-11-06 22:55:19,241 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 3293 transitions. [2023-11-06 22:55:19,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 3293 transitions. [2023-11-06 22:55:19,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:55:19,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 3293 transitions. [2023-11-06 22:55:19,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 84.43589743589743) internal successors, (3293), 39 states have internal predecessors, (3293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:19,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 200.0) internal successors, (8000), 40 states have internal predecessors, (8000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:19,269 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 200.0) internal successors, (8000), 40 states have internal predecessors, (8000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:19,269 INFO L175 Difference]: Start difference. First operand has 221 places, 460 transitions, 8159 flow. Second operand 39 states and 3293 transitions. [2023-11-06 22:55:19,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 704 transitions, 13883 flow [2023-11-06 22:55:19,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 704 transitions, 13266 flow, removed 209 selfloop flow, removed 13 redundant places. [2023-11-06 22:55:19,861 INFO L231 Difference]: Finished difference. Result has 253 places, 612 transitions, 12448 flow [2023-11-06 22:55:19,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=7754, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=349, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=12448, PETRI_PLACES=253, PETRI_TRANSITIONS=612} [2023-11-06 22:55:19,862 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 224 predicate places. [2023-11-06 22:55:19,862 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 612 transitions, 12448 flow [2023-11-06 22:55:19,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 81.54545454545455) internal successors, (1794), 22 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:19,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:55:19,863 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:55:19,869 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-06 22:55:20,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-06 22:55:20,069 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:55:20,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:55:20,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1517878987, now seen corresponding path program 13 times [2023-11-06 22:55:20,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:55:20,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304458173] [2023-11-06 22:55:20,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:20,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:55:20,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:20,487 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:20,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:55:20,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304458173] [2023-11-06 22:55:20,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304458173] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:55:20,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809740867] [2023-11-06 22:55:20,489 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:55:20,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:20,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:55:20,491 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:55:20,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 22:55:20,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:20,594 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:55:20,596 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:55:20,731 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:20,732 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:55:20,932 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:20,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809740867] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:55:20,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:55:20,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2023-11-06 22:55:20,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689420704] [2023-11-06 22:55:20,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:55:20,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-06 22:55:20,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:55:20,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-06 22:55:20,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2023-11-06 22:55:21,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 200 [2023-11-06 22:55:21,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 612 transitions, 12448 flow. Second operand has 23 states, 23 states have (on average 81.47826086956522) internal successors, (1874), 23 states have internal predecessors, (1874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:21,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:55:21,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 200 [2023-11-06 22:55:21,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:55:24,661 INFO L124 PetriNetUnfolderBase]: 1603/2676 cut-off events. [2023-11-06 22:55:24,661 INFO L125 PetriNetUnfolderBase]: For 59452/59452 co-relation queries the response was YES. [2023-11-06 22:55:24,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24958 conditions, 2676 events. 1603/2676 cut-off events. For 59452/59452 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 15168 event pairs, 90 based on Foata normal form. 64/2740 useless extension candidates. Maximal degree in co-relation 24879. Up to 910 conditions per place. [2023-11-06 22:55:24,702 INFO L140 encePairwiseOnDemand]: 194/200 looper letters, 180 selfloop transitions, 537 changer transitions 3/720 dead transitions. [2023-11-06 22:55:24,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 720 transitions, 14758 flow [2023-11-06 22:55:24,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-06 22:55:24,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-11-06 22:55:24,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 3973 transitions. [2023-11-06 22:55:24,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226595744680851 [2023-11-06 22:55:24,710 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 3973 transitions. [2023-11-06 22:55:24,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 3973 transitions. [2023-11-06 22:55:24,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:55:24,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 3973 transitions. [2023-11-06 22:55:24,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 84.53191489361703) internal successors, (3973), 47 states have internal predecessors, (3973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:24,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 200.0) internal successors, (9600), 48 states have internal predecessors, (9600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:24,813 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 200.0) internal successors, (9600), 48 states have internal predecessors, (9600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:24,813 INFO L175 Difference]: Start difference. First operand has 253 places, 612 transitions, 12448 flow. Second operand 47 states and 3973 transitions. [2023-11-06 22:55:24,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 720 transitions, 14758 flow [2023-11-06 22:55:25,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 720 transitions, 13159 flow, removed 624 selfloop flow, removed 13 redundant places. [2023-11-06 22:55:25,603 INFO L231 Difference]: Finished difference. Result has 287 places, 626 transitions, 12351 flow [2023-11-06 22:55:25,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=10702, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=512, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=12351, PETRI_PLACES=287, PETRI_TRANSITIONS=626} [2023-11-06 22:55:25,605 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 258 predicate places. [2023-11-06 22:55:25,605 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 626 transitions, 12351 flow [2023-11-06 22:55:25,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 81.47826086956522) internal successors, (1874), 23 states have internal predecessors, (1874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:25,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:55:25,606 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:55:25,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 22:55:25,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-06 22:55:25,814 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:55:25,814 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:55:25,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1374512629, now seen corresponding path program 14 times [2023-11-06 22:55:25,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:55:25,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714854284] [2023-11-06 22:55:25,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:25,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:55:25,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:26,038 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:26,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:55:26,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714854284] [2023-11-06 22:55:26,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714854284] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:55:26,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329193839] [2023-11-06 22:55:26,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:55:26,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:26,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:55:26,041 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:55:26,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 22:55:26,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:55:26,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:55:26,157 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:55:26,158 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:55:26,258 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:26,258 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:55:26,508 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:26,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329193839] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:55:26,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:55:26,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-11-06 22:55:26,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284233028] [2023-11-06 22:55:26,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:55:26,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 22:55:26,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:55:26,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 22:55:26,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:55:26,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 200 [2023-11-06 22:55:26,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 626 transitions, 12351 flow. Second operand has 17 states, 17 states have (on average 81.88235294117646) internal successors, (1392), 17 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:26,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:55:26,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 200 [2023-11-06 22:55:26,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:55:30,297 INFO L124 PetriNetUnfolderBase]: 1762/2959 cut-off events. [2023-11-06 22:55:30,298 INFO L125 PetriNetUnfolderBase]: For 50692/50692 co-relation queries the response was YES. [2023-11-06 22:55:30,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26897 conditions, 2959 events. 1762/2959 cut-off events. For 50692/50692 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 17342 event pairs, 104 based on Foata normal form. 56/3015 useless extension candidates. Maximal degree in co-relation 26817. Up to 944 conditions per place. [2023-11-06 22:55:30,349 INFO L140 encePairwiseOnDemand]: 194/200 looper letters, 330 selfloop transitions, 442 changer transitions 14/786 dead transitions. [2023-11-06 22:55:30,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 786 transitions, 15994 flow [2023-11-06 22:55:30,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-06 22:55:30,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-11-06 22:55:30,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 3469 transitions. [2023-11-06 22:55:30,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42304878048780487 [2023-11-06 22:55:30,356 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 3469 transitions. [2023-11-06 22:55:30,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 3469 transitions. [2023-11-06 22:55:30,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:55:30,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 3469 transitions. [2023-11-06 22:55:30,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 84.60975609756098) internal successors, (3469), 41 states have internal predecessors, (3469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:30,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 200.0) internal successors, (8400), 42 states have internal predecessors, (8400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:30,381 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 200.0) internal successors, (8400), 42 states have internal predecessors, (8400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:30,381 INFO L175 Difference]: Start difference. First operand has 287 places, 626 transitions, 12351 flow. Second operand 41 states and 3469 transitions. [2023-11-06 22:55:30,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 786 transitions, 15994 flow [2023-11-06 22:55:31,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 786 transitions, 15072 flow, removed 146 selfloop flow, removed 36 redundant places. [2023-11-06 22:55:31,060 INFO L231 Difference]: Finished difference. Result has 303 places, 683 transitions, 14026 flow [2023-11-06 22:55:31,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=11401, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=375, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=14026, PETRI_PLACES=303, PETRI_TRANSITIONS=683} [2023-11-06 22:55:31,061 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 274 predicate places. [2023-11-06 22:55:31,061 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 683 transitions, 14026 flow [2023-11-06 22:55:31,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 81.88235294117646) internal successors, (1392), 17 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:31,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:55:31,061 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:55:31,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 22:55:31,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-06 22:55:31,262 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:55:31,262 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:55:31,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1041531953, now seen corresponding path program 15 times [2023-11-06 22:55:31,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:55:31,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923425921] [2023-11-06 22:55:31,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:31,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:55:31,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:31,463 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:31,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:55:31,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923425921] [2023-11-06 22:55:31,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923425921] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:55:31,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358936075] [2023-11-06 22:55:31,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:55:31,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:31,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:55:31,465 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:55:31,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 22:55:31,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-06 22:55:31,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:55:31,621 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:55:31,622 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:55:31,721 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:31,721 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:55:31,916 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:31,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358936075] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:55:31,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:55:31,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-11-06 22:55:31,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549191932] [2023-11-06 22:55:31,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:55:31,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:55:31,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:55:31,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:55:31,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:55:32,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 200 [2023-11-06 22:55:32,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 683 transitions, 14026 flow. Second operand has 18 states, 18 states have (on average 81.83333333333333) internal successors, (1473), 18 states have internal predecessors, (1473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:32,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:55:32,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 200 [2023-11-06 22:55:32,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:55:36,086 INFO L124 PetriNetUnfolderBase]: 2103/3560 cut-off events. [2023-11-06 22:55:36,086 INFO L125 PetriNetUnfolderBase]: For 67322/67322 co-relation queries the response was YES. [2023-11-06 22:55:36,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33750 conditions, 3560 events. 2103/3560 cut-off events. For 67322/67322 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 21844 event pairs, 288 based on Foata normal form. 42/3602 useless extension candidates. Maximal degree in co-relation 33657. Up to 2194 conditions per place. [2023-11-06 22:55:36,154 INFO L140 encePairwiseOnDemand]: 194/200 looper letters, 532 selfloop transitions, 376 changer transitions 14/922 dead transitions. [2023-11-06 22:55:36,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 922 transitions, 20075 flow [2023-11-06 22:55:36,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-06 22:55:36,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-11-06 22:55:36,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 3704 transitions. [2023-11-06 22:55:36,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4209090909090909 [2023-11-06 22:55:36,163 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 3704 transitions. [2023-11-06 22:55:36,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 3704 transitions. [2023-11-06 22:55:36,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:55:36,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 3704 transitions. [2023-11-06 22:55:36,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 84.18181818181819) internal successors, (3704), 44 states have internal predecessors, (3704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:36,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 200.0) internal successors, (9000), 45 states have internal predecessors, (9000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:36,185 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 200.0) internal successors, (9000), 45 states have internal predecessors, (9000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:36,185 INFO L175 Difference]: Start difference. First operand has 303 places, 683 transitions, 14026 flow. Second operand 44 states and 3704 transitions. [2023-11-06 22:55:36,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 922 transitions, 20075 flow [2023-11-06 22:55:37,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 922 transitions, 19626 flow, removed 177 selfloop flow, removed 14 redundant places. [2023-11-06 22:55:37,712 INFO L231 Difference]: Finished difference. Result has 343 places, 791 transitions, 17580 flow [2023-11-06 22:55:37,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=13537, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=270, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=17580, PETRI_PLACES=343, PETRI_TRANSITIONS=791} [2023-11-06 22:55:37,713 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 314 predicate places. [2023-11-06 22:55:37,713 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 791 transitions, 17580 flow [2023-11-06 22:55:37,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 81.83333333333333) internal successors, (1473), 18 states have internal predecessors, (1473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:37,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:55:37,714 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:55:37,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-06 22:55:37,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-06 22:55:37,915 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:55:37,915 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:55:37,916 INFO L85 PathProgramCache]: Analyzing trace with hash -484151631, now seen corresponding path program 16 times [2023-11-06 22:55:37,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:55:37,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803758961] [2023-11-06 22:55:37,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:37,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:55:37,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:38,149 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:38,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:55:38,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803758961] [2023-11-06 22:55:38,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803758961] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:55:38,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238145588] [2023-11-06 22:55:38,150 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:55:38,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:38,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:55:38,152 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:55:38,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 22:55:38,267 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:55:38,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:55:38,269 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:55:38,270 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:55:38,379 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:38,379 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:55:38,590 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:38,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238145588] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:55:38,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:55:38,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-11-06 22:55:38,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147439132] [2023-11-06 22:55:38,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:55:38,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:55:38,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:55:38,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:55:38,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:55:38,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 200 [2023-11-06 22:55:38,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 791 transitions, 17580 flow. Second operand has 16 states, 16 states have (on average 81.9375) internal successors, (1311), 16 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:38,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:55:38,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 200 [2023-11-06 22:55:38,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:55:43,360 INFO L124 PetriNetUnfolderBase]: 2373/4034 cut-off events. [2023-11-06 22:55:43,360 INFO L125 PetriNetUnfolderBase]: For 74291/74291 co-relation queries the response was YES. [2023-11-06 22:55:43,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39457 conditions, 4034 events. 2373/4034 cut-off events. For 74291/74291 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 25345 event pairs, 438 based on Foata normal form. 22/4056 useless extension candidates. Maximal degree in co-relation 39353. Up to 2882 conditions per place. [2023-11-06 22:55:43,450 INFO L140 encePairwiseOnDemand]: 194/200 looper letters, 741 selfloop transitions, 278 changer transitions 0/1019 dead transitions. [2023-11-06 22:55:43,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 1019 transitions, 23140 flow [2023-11-06 22:55:43,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-06 22:55:43,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-11-06 22:55:43,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 3389 transitions. [2023-11-06 22:55:43,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.423625 [2023-11-06 22:55:43,458 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 3389 transitions. [2023-11-06 22:55:43,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 3389 transitions. [2023-11-06 22:55:43,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:55:43,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 3389 transitions. [2023-11-06 22:55:43,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 84.725) internal successors, (3389), 40 states have internal predecessors, (3389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:43,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 200.0) internal successors, (8200), 41 states have internal predecessors, (8200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:43,479 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 200.0) internal successors, (8200), 41 states have internal predecessors, (8200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:43,479 INFO L175 Difference]: Start difference. First operand has 343 places, 791 transitions, 17580 flow. Second operand 40 states and 3389 transitions. [2023-11-06 22:55:43,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 1019 transitions, 23140 flow [2023-11-06 22:55:44,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 1019 transitions, 22655 flow, removed 153 selfloop flow, removed 25 redundant places. [2023-11-06 22:55:44,924 INFO L231 Difference]: Finished difference. Result has 369 places, 875 transitions, 19784 flow [2023-11-06 22:55:44,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=17100, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=791, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=19784, PETRI_PLACES=369, PETRI_TRANSITIONS=875} [2023-11-06 22:55:44,926 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 340 predicate places. [2023-11-06 22:55:44,926 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 875 transitions, 19784 flow [2023-11-06 22:55:44,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 81.9375) internal successors, (1311), 16 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:44,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:55:44,927 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:55:44,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-06 22:55:45,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:45,127 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:55:45,128 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:55:45,128 INFO L85 PathProgramCache]: Analyzing trace with hash -313166947, now seen corresponding path program 17 times [2023-11-06 22:55:45,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:55:45,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630642502] [2023-11-06 22:55:45,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:45,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:55:45,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:45,345 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:45,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:55:45,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630642502] [2023-11-06 22:55:45,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630642502] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:55:45,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902827521] [2023-11-06 22:55:45,346 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:55:45,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:45,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:55:45,348 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:55:45,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-06 22:55:45,472 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 22:55:45,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:55:45,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:55:45,475 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:55:45,557 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:45,557 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:55:45,741 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:45,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902827521] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:55:45,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:55:45,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-11-06 22:55:45,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108731586] [2023-11-06 22:55:45,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:55:45,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:55:45,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:55:45,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:55:45,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:55:45,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 200 [2023-11-06 22:55:45,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 875 transitions, 19784 flow. Second operand has 16 states, 16 states have (on average 81.9375) internal successors, (1311), 16 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:45,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:55:45,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 200 [2023-11-06 22:55:45,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:55:50,450 INFO L124 PetriNetUnfolderBase]: 2656/4511 cut-off events. [2023-11-06 22:55:50,450 INFO L125 PetriNetUnfolderBase]: For 95058/95058 co-relation queries the response was YES. [2023-11-06 22:55:50,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45596 conditions, 4511 events. 2656/4511 cut-off events. For 95058/95058 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 28823 event pairs, 630 based on Foata normal form. 42/4553 useless extension candidates. Maximal degree in co-relation 45487. Up to 3680 conditions per place. [2023-11-06 22:55:50,582 INFO L140 encePairwiseOnDemand]: 194/200 looper letters, 890 selfloop transitions, 198 changer transitions 4/1092 dead transitions. [2023-11-06 22:55:50,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 1092 transitions, 25719 flow [2023-11-06 22:55:50,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-06 22:55:50,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-06 22:55:50,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3132 transitions. [2023-11-06 22:55:50,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42324324324324325 [2023-11-06 22:55:50,587 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3132 transitions. [2023-11-06 22:55:50,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3132 transitions. [2023-11-06 22:55:50,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:55:50,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3132 transitions. [2023-11-06 22:55:50,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 84.64864864864865) internal successors, (3132), 37 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:50,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 200.0) internal successors, (7600), 38 states have internal predecessors, (7600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:50,601 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 200.0) internal successors, (7600), 38 states have internal predecessors, (7600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:50,601 INFO L175 Difference]: Start difference. First operand has 369 places, 875 transitions, 19784 flow. Second operand 37 states and 3132 transitions. [2023-11-06 22:55:50,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 1092 transitions, 25719 flow [2023-11-06 22:55:51,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 1092 transitions, 24820 flow, removed 262 selfloop flow, removed 13 redundant places. [2023-11-06 22:55:52,015 INFO L231 Difference]: Finished difference. Result has 407 places, 960 transitions, 21828 flow [2023-11-06 22:55:52,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=18975, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=875, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=716, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=21828, PETRI_PLACES=407, PETRI_TRANSITIONS=960} [2023-11-06 22:55:52,017 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 378 predicate places. [2023-11-06 22:55:52,017 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 960 transitions, 21828 flow [2023-11-06 22:55:52,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 81.9375) internal successors, (1311), 16 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:52,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:55:52,018 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:55:52,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-06 22:55:52,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:52,218 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:55:52,219 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:55:52,219 INFO L85 PathProgramCache]: Analyzing trace with hash 702407717, now seen corresponding path program 18 times [2023-11-06 22:55:52,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:55:52,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735536881] [2023-11-06 22:55:52,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:52,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:55:52,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:52,422 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:52,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:55:52,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735536881] [2023-11-06 22:55:52,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735536881] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:55:52,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144029033] [2023-11-06 22:55:52,424 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:55:52,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:52,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:55:52,426 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:55:52,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-06 22:55:52,550 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 22:55:52,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:55:52,552 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:55:52,553 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:55:52,649 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:52,649 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:55:52,855 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:52,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144029033] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:55:52,856 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:55:52,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-11-06 22:55:52,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202612863] [2023-11-06 22:55:52,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:55:52,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 22:55:52,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:55:52,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 22:55:52,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:55:53,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 200 [2023-11-06 22:55:53,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 960 transitions, 21828 flow. Second operand has 17 states, 17 states have (on average 81.88235294117646) internal successors, (1392), 17 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:53,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:55:53,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 200 [2023-11-06 22:55:53,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:55:58,489 INFO L124 PetriNetUnfolderBase]: 2842/4833 cut-off events. [2023-11-06 22:55:58,489 INFO L125 PetriNetUnfolderBase]: For 106004/106004 co-relation queries the response was YES. [2023-11-06 22:55:58,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49574 conditions, 4833 events. 2842/4833 cut-off events. For 106004/106004 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 31307 event pairs, 612 based on Foata normal form. 26/4859 useless extension candidates. Maximal degree in co-relation 49451. Up to 3686 conditions per place. [2023-11-06 22:55:58,549 INFO L140 encePairwiseOnDemand]: 194/200 looper letters, 783 selfloop transitions, 310 changer transitions 14/1107 dead transitions. [2023-11-06 22:55:58,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 1107 transitions, 26428 flow [2023-11-06 22:55:58,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-06 22:55:58,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-11-06 22:55:58,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2785 transitions. [2023-11-06 22:55:58,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421969696969697 [2023-11-06 22:55:58,552 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2785 transitions. [2023-11-06 22:55:58,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2785 transitions. [2023-11-06 22:55:58,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:55:58,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2785 transitions. [2023-11-06 22:55:58,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 84.39393939393939) internal successors, (2785), 33 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:58,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 200.0) internal successors, (6800), 34 states have internal predecessors, (6800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:58,559 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 200.0) internal successors, (6800), 34 states have internal predecessors, (6800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:55:58,559 INFO L175 Difference]: Start difference. First operand has 407 places, 960 transitions, 21828 flow. Second operand 33 states and 2785 transitions. [2023-11-06 22:55:58,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 1107 transitions, 26428 flow [2023-11-06 22:56:00,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 1107 transitions, 25456 flow, removed 432 selfloop flow, removed 13 redundant places. [2023-11-06 22:56:00,516 INFO L231 Difference]: Finished difference. Result has 438 places, 1026 transitions, 23630 flow [2023-11-06 22:56:00,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=20820, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=954, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=244, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=668, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=23630, PETRI_PLACES=438, PETRI_TRANSITIONS=1026} [2023-11-06 22:56:00,518 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 409 predicate places. [2023-11-06 22:56:00,518 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 1026 transitions, 23630 flow [2023-11-06 22:56:00,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 81.88235294117646) internal successors, (1392), 17 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:00,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:56:00,519 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:56:00,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-06 22:56:00,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:56:00,725 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:56:00,725 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:56:00,726 INFO L85 PathProgramCache]: Analyzing trace with hash 214401735, now seen corresponding path program 19 times [2023-11-06 22:56:00,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:56:00,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567460558] [2023-11-06 22:56:00,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:56:00,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:56:00,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:56:00,918 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:56:00,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:56:00,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567460558] [2023-11-06 22:56:00,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567460558] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:56:00,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992579087] [2023-11-06 22:56:00,919 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:56:00,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:56:00,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:56:00,921 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:56:00,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-06 22:56:01,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:56:01,025 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:56:01,026 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:56:01,095 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:56:01,096 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:56:01,263 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:56:01,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992579087] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:56:01,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:56:01,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-11-06 22:56:01,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988699899] [2023-11-06 22:56:01,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:56:01,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:56:01,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:56:01,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:56:01,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:56:01,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 200 [2023-11-06 22:56:01,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 1026 transitions, 23630 flow. Second operand has 16 states, 16 states have (on average 81.75) internal successors, (1308), 16 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:01,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:56:01,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 200 [2023-11-06 22:56:01,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:56:06,011 INFO L124 PetriNetUnfolderBase]: 2949/5014 cut-off events. [2023-11-06 22:56:06,012 INFO L125 PetriNetUnfolderBase]: For 115452/115452 co-relation queries the response was YES. [2023-11-06 22:56:06,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51924 conditions, 5014 events. 2949/5014 cut-off events. For 115452/115452 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 32698 event pairs, 760 based on Foata normal form. 48/5062 useless extension candidates. Maximal degree in co-relation 51789. Up to 4448 conditions per place. [2023-11-06 22:56:06,097 INFO L140 encePairwiseOnDemand]: 194/200 looper letters, 1039 selfloop transitions, 148 changer transitions 0/1187 dead transitions. [2023-11-06 22:56:06,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 1187 transitions, 28381 flow [2023-11-06 22:56:06,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-06 22:56:06,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-06 22:56:06,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3132 transitions. [2023-11-06 22:56:06,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42324324324324325 [2023-11-06 22:56:06,103 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3132 transitions. [2023-11-06 22:56:06,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3132 transitions. [2023-11-06 22:56:06,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:56:06,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3132 transitions. [2023-11-06 22:56:06,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 84.64864864864865) internal successors, (3132), 37 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:06,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 200.0) internal successors, (7600), 38 states have internal predecessors, (7600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:06,116 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 200.0) internal successors, (7600), 38 states have internal predecessors, (7600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:06,116 INFO L175 Difference]: Start difference. First operand has 438 places, 1026 transitions, 23630 flow. Second operand 37 states and 3132 transitions. [2023-11-06 22:56:06,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 1187 transitions, 28381 flow [2023-11-06 22:56:08,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 1187 transitions, 27769 flow, removed 203 selfloop flow, removed 19 redundant places. [2023-11-06 22:56:08,563 INFO L231 Difference]: Finished difference. Result has 471 places, 1087 transitions, 24951 flow [2023-11-06 22:56:08,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=23022, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1026, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=919, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=24951, PETRI_PLACES=471, PETRI_TRANSITIONS=1087} [2023-11-06 22:56:08,566 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 442 predicate places. [2023-11-06 22:56:08,566 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 1087 transitions, 24951 flow [2023-11-06 22:56:08,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 81.75) internal successors, (1308), 16 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:08,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:56:08,566 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:56:08,573 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-06 22:56:08,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:56:08,773 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:56:08,774 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:56:08,774 INFO L85 PathProgramCache]: Analyzing trace with hash -790648987, now seen corresponding path program 20 times [2023-11-06 22:56:08,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:56:08,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659266741] [2023-11-06 22:56:08,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:56:08,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:56:08,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:56:09,124 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:56:09,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:56:09,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659266741] [2023-11-06 22:56:09,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659266741] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:56:09,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140290970] [2023-11-06 22:56:09,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:56:09,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:56:09,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:56:09,127 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:56:09,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-06 22:56:09,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:56:09,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:56:09,235 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:56:09,239 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:56:09,364 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:56:09,364 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:56:09,539 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:56:09,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140290970] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:56:09,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:56:09,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2023-11-06 22:56:09,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737587769] [2023-11-06 22:56:09,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:56:09,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 22:56:09,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:56:09,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 22:56:09,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2023-11-06 22:56:09,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 200 [2023-11-06 22:56:09,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 1087 transitions, 24951 flow. Second operand has 21 states, 21 states have (on average 81.66666666666667) internal successors, (1715), 21 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:09,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:56:09,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 200 [2023-11-06 22:56:09,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:56:14,666 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:56:18,334 INFO L124 PetriNetUnfolderBase]: 3128/5283 cut-off events. [2023-11-06 22:56:18,334 INFO L125 PetriNetUnfolderBase]: For 120806/120806 co-relation queries the response was YES. [2023-11-06 22:56:18,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55606 conditions, 5283 events. 3128/5283 cut-off events. For 120806/120806 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 34555 event pairs, 509 based on Foata normal form. 22/5305 useless extension candidates. Maximal degree in co-relation 55459. Up to 3399 conditions per place. [2023-11-06 22:56:18,420 INFO L140 encePairwiseOnDemand]: 194/200 looper letters, 549 selfloop transitions, 698 changer transitions 15/1262 dead transitions. [2023-11-06 22:56:18,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 1262 transitions, 30974 flow [2023-11-06 22:56:18,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-06 22:56:18,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-06 22:56:18,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2616 transitions. [2023-11-06 22:56:18,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42193548387096774 [2023-11-06 22:56:18,424 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2616 transitions. [2023-11-06 22:56:18,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2616 transitions. [2023-11-06 22:56:18,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:56:18,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2616 transitions. [2023-11-06 22:56:18,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 84.38709677419355) internal successors, (2616), 31 states have internal predecessors, (2616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:18,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 200.0) internal successors, (6400), 32 states have internal predecessors, (6400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:18,437 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 200.0) internal successors, (6400), 32 states have internal predecessors, (6400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:18,437 INFO L175 Difference]: Start difference. First operand has 471 places, 1087 transitions, 24951 flow. Second operand 31 states and 2616 transitions. [2023-11-06 22:56:18,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 1262 transitions, 30974 flow [2023-11-06 22:56:21,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 1262 transitions, 29810 flow, removed 511 selfloop flow, removed 15 redundant places. [2023-11-06 22:56:21,171 INFO L231 Difference]: Finished difference. Result has 495 places, 1201 transitions, 29113 flow [2023-11-06 22:56:21,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=23906, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1087, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=591, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=29113, PETRI_PLACES=495, PETRI_TRANSITIONS=1201} [2023-11-06 22:56:21,174 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 466 predicate places. [2023-11-06 22:56:21,174 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 1201 transitions, 29113 flow [2023-11-06 22:56:21,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 81.66666666666667) internal successors, (1715), 21 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:21,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:56:21,175 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:56:21,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-06 22:56:21,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:56:21,380 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:56:21,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:56:21,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1689427361, now seen corresponding path program 21 times [2023-11-06 22:56:21,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:56:21,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34284699] [2023-11-06 22:56:21,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:56:21,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:56:21,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:56:21,764 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:56:21,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:56:21,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34284699] [2023-11-06 22:56:21,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34284699] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:56:21,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217027432] [2023-11-06 22:56:21,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:56:21,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:56:21,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:56:21,770 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:56:21,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-06 22:56:21,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-06 22:56:21,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:56:21,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:56:21,907 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:56:22,042 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:56:22,043 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:56:22,286 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:56:22,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217027432] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:56:22,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:56:22,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2023-11-06 22:56:22,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842704345] [2023-11-06 22:56:22,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:56:22,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 22:56:22,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:56:22,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 22:56:22,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2023-11-06 22:56:22,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 200 [2023-11-06 22:56:22,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 1201 transitions, 29113 flow. Second operand has 21 states, 21 states have (on average 81.71428571428571) internal successors, (1716), 21 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:22,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:56:22,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 200 [2023-11-06 22:56:22,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:56:31,716 INFO L124 PetriNetUnfolderBase]: 3148/5338 cut-off events. [2023-11-06 22:56:31,716 INFO L125 PetriNetUnfolderBase]: For 136239/136239 co-relation queries the response was YES. [2023-11-06 22:56:31,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58542 conditions, 5338 events. 3148/5338 cut-off events. For 136239/136239 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 35168 event pairs, 368 based on Foata normal form. 48/5386 useless extension candidates. Maximal degree in co-relation 58387. Up to 2803 conditions per place. [2023-11-06 22:56:31,817 INFO L140 encePairwiseOnDemand]: 194/200 looper letters, 470 selfloop transitions, 813 changer transitions 4/1287 dead transitions. [2023-11-06 22:56:31,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 1287 transitions, 32853 flow [2023-11-06 22:56:31,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-06 22:56:31,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-06 22:56:31,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3127 transitions. [2023-11-06 22:56:31,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4225675675675676 [2023-11-06 22:56:31,823 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3127 transitions. [2023-11-06 22:56:31,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3127 transitions. [2023-11-06 22:56:31,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:56:31,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3127 transitions. [2023-11-06 22:56:31,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 84.51351351351352) internal successors, (3127), 37 states have internal predecessors, (3127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:31,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 200.0) internal successors, (7600), 38 states have internal predecessors, (7600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:31,840 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 200.0) internal successors, (7600), 38 states have internal predecessors, (7600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:31,841 INFO L175 Difference]: Start difference. First operand has 495 places, 1201 transitions, 29113 flow. Second operand 37 states and 3127 transitions. [2023-11-06 22:56:31,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 1287 transitions, 32853 flow [2023-11-06 22:56:34,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 514 places, 1287 transitions, 31669 flow, removed 533 selfloop flow, removed 16 redundant places. [2023-11-06 22:56:35,043 INFO L231 Difference]: Finished difference. Result has 516 places, 1222 transitions, 30418 flow [2023-11-06 22:56:35,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=28015, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=785, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=30418, PETRI_PLACES=516, PETRI_TRANSITIONS=1222} [2023-11-06 22:56:35,044 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 487 predicate places. [2023-11-06 22:56:35,045 INFO L495 AbstractCegarLoop]: Abstraction has has 516 places, 1222 transitions, 30418 flow [2023-11-06 22:56:35,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 81.71428571428571) internal successors, (1716), 21 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:35,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:56:35,045 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:56:35,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-06 22:56:35,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:56:35,246 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:56:35,246 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:56:35,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1836899569, now seen corresponding path program 22 times [2023-11-06 22:56:35,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:56:35,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286385723] [2023-11-06 22:56:35,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:56:35,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:56:35,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:56:35,439 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:56:35,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:56:35,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286385723] [2023-11-06 22:56:35,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286385723] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:56:35,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211021419] [2023-11-06 22:56:35,440 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:56:35,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:56:35,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:56:35,442 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:56:35,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-06 22:56:35,565 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:56:35,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:56:35,567 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:56:35,568 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:56:35,651 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:56:35,651 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:56:35,841 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:56:35,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211021419] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:56:35,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:56:35,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-11-06 22:56:35,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786048494] [2023-11-06 22:56:35,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:56:35,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 22:56:35,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:56:35,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 22:56:35,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:56:36,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 200 [2023-11-06 22:56:36,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 516 places, 1222 transitions, 30418 flow. Second operand has 17 states, 17 states have (on average 81.88235294117646) internal successors, (1392), 17 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:36,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:56:36,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 200 [2023-11-06 22:56:36,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:56:43,070 INFO L124 PetriNetUnfolderBase]: 3409/5807 cut-off events. [2023-11-06 22:56:43,071 INFO L125 PetriNetUnfolderBase]: For 138811/138811 co-relation queries the response was YES. [2023-11-06 22:56:43,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64743 conditions, 5807 events. 3409/5807 cut-off events. For 138811/138811 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 38936 event pairs, 632 based on Foata normal form. 26/5833 useless extension candidates. Maximal degree in co-relation 64590. Up to 3979 conditions per place. [2023-11-06 22:56:43,182 INFO L140 encePairwiseOnDemand]: 194/200 looper letters, 892 selfloop transitions, 492 changer transitions 12/1396 dead transitions. [2023-11-06 22:56:43,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 552 places, 1396 transitions, 36419 flow [2023-11-06 22:56:43,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-06 22:56:43,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-06 22:56:43,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3119 transitions. [2023-11-06 22:56:43,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4214864864864865 [2023-11-06 22:56:43,190 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3119 transitions. [2023-11-06 22:56:43,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3119 transitions. [2023-11-06 22:56:43,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:56:43,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3119 transitions. [2023-11-06 22:56:43,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 84.29729729729729) internal successors, (3119), 37 states have internal predecessors, (3119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:43,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 200.0) internal successors, (7600), 38 states have internal predecessors, (7600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:43,207 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 200.0) internal successors, (7600), 38 states have internal predecessors, (7600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:43,207 INFO L175 Difference]: Start difference. First operand has 516 places, 1222 transitions, 30418 flow. Second operand 37 states and 3119 transitions. [2023-11-06 22:56:43,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 552 places, 1396 transitions, 36419 flow [2023-11-06 22:56:46,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 528 places, 1396 transitions, 34744 flow, removed 237 selfloop flow, removed 24 redundant places. [2023-11-06 22:56:46,566 INFO L231 Difference]: Finished difference. Result has 538 places, 1317 transitions, 33041 flow [2023-11-06 22:56:46,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=28882, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=409, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=756, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=33041, PETRI_PLACES=538, PETRI_TRANSITIONS=1317} [2023-11-06 22:56:46,567 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 509 predicate places. [2023-11-06 22:56:46,568 INFO L495 AbstractCegarLoop]: Abstraction has has 538 places, 1317 transitions, 33041 flow [2023-11-06 22:56:46,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 81.88235294117646) internal successors, (1392), 17 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:46,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:56:46,569 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:56:46,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-06 22:56:46,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:56:46,771 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:56:46,771 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:56:46,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1539337889, now seen corresponding path program 23 times [2023-11-06 22:56:46,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:56:46,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442407790] [2023-11-06 22:56:46,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:56:46,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:56:46,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:56:46,921 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:56:46,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:56:46,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442407790] [2023-11-06 22:56:46,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442407790] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:56:46,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660671478] [2023-11-06 22:56:46,922 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:56:46,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:56:46,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:56:46,923 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:56:46,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-06 22:56:47,044 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-06 22:56:47,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:56:47,046 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 22:56:47,047 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:56:47,104 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:56:47,104 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:56:47,256 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:56:47,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660671478] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:56:47,256 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:56:47,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-06 22:56:47,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350260456] [2023-11-06 22:56:47,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:56:47,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:56:47,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:56:47,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:56:47,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:56:47,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 200 [2023-11-06 22:56:47,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 538 places, 1317 transitions, 33041 flow. Second operand has 13 states, 13 states have (on average 87.46153846153847) internal successors, (1137), 13 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:47,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:56:47,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 200 [2023-11-06 22:56:47,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:56:55,072 INFO L124 PetriNetUnfolderBase]: 4491/7781 cut-off events. [2023-11-06 22:56:55,073 INFO L125 PetriNetUnfolderBase]: For 210182/210182 co-relation queries the response was YES. [2023-11-06 22:56:55,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87849 conditions, 7781 events. 4491/7781 cut-off events. For 210182/210182 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 56187 event pairs, 192 based on Foata normal form. 34/7814 useless extension candidates. Maximal degree in co-relation 87690. Up to 4156 conditions per place. [2023-11-06 22:56:55,256 INFO L140 encePairwiseOnDemand]: 195/200 looper letters, 1066 selfloop transitions, 644 changer transitions 123/1835 dead transitions. [2023-11-06 22:56:55,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 544 places, 1835 transitions, 49539 flow [2023-11-06 22:56:55,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:56:55,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:56:55,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 656 transitions. [2023-11-06 22:56:55,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4685714285714286 [2023-11-06 22:56:55,258 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 656 transitions. [2023-11-06 22:56:55,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 656 transitions. [2023-11-06 22:56:55,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:56:55,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 656 transitions. [2023-11-06 22:56:55,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 93.71428571428571) internal successors, (656), 7 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:55,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 200.0) internal successors, (1600), 8 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:55,262 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 200.0) internal successors, (1600), 8 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:56:55,262 INFO L175 Difference]: Start difference. First operand has 538 places, 1317 transitions, 33041 flow. Second operand 7 states and 656 transitions. [2023-11-06 22:56:55,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 544 places, 1835 transitions, 49539 flow [2023-11-06 22:57:01,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 1835 transitions, 48928 flow, removed 209 selfloop flow, removed 21 redundant places. [2023-11-06 22:57:01,320 INFO L231 Difference]: Finished difference. Result has 528 places, 1542 transitions, 41072 flow [2023-11-06 22:57:01,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=32621, PETRI_DIFFERENCE_MINUEND_PLACES=517, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=396, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=691, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=41072, PETRI_PLACES=528, PETRI_TRANSITIONS=1542} [2023-11-06 22:57:01,322 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 499 predicate places. [2023-11-06 22:57:01,322 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 1542 transitions, 41072 flow [2023-11-06 22:57:01,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 87.46153846153847) internal successors, (1137), 13 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:01,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:57:01,322 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:57:01,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-06 22:57:01,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:57:01,523 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-06 22:57:01,523 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:57:01,523 INFO L85 PathProgramCache]: Analyzing trace with hash -313724544, now seen corresponding path program 24 times [2023-11-06 22:57:01,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:57:01,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025606990] [2023-11-06 22:57:01,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:57:01,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:57:01,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:57:01,807 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:57:01,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:57:01,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025606990] [2023-11-06 22:57:01,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025606990] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:57:01,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693608030] [2023-11-06 22:57:01,808 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:57:01,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:57:01,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:57:01,810 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:57:01,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-06 22:57:01,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-06 22:57:01,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:57:01,950 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 22:57:01,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:57:02,062 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:57:02,062 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:57:02,296 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:57:02,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693608030] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:57:02,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:57:02,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2023-11-06 22:57:02,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306958727] [2023-11-06 22:57:02,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:57:02,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 22:57:02,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:57:02,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 22:57:02,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2023-11-06 22:57:02,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 200 [2023-11-06 22:57:02,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 528 places, 1542 transitions, 41072 flow. Second operand has 19 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 22:57:02,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:57:02,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 200 [2023-11-06 22:57:02,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:57:15,014 INFO L124 PetriNetUnfolderBase]: 6664/10905 cut-off events. [2023-11-06 22:57:15,014 INFO L125 PetriNetUnfolderBase]: For 286382/286382 co-relation queries the response was YES. [2023-11-06 22:57:15,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132758 conditions, 10905 events. 6664/10905 cut-off events. For 286382/286382 co-relation queries the response was YES. Maximal size of possible extension queue 797. Compared 76448 event pairs, 149 based on Foata normal form. 38/10943 useless extension candidates. Maximal degree in co-relation 132596. Up to 4694 conditions per place. [2023-11-06 22:57:15,361 INFO L140 encePairwiseOnDemand]: 194/200 looper letters, 1507 selfloop transitions, 1144 changer transitions 11/2662 dead transitions. [2023-11-06 22:57:15,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 558 places, 2662 transitions, 75469 flow [2023-11-06 22:57:15,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-06 22:57:15,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-06 22:57:15,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2638 transitions. [2023-11-06 22:57:15,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42548387096774193 [2023-11-06 22:57:15,366 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2638 transitions. [2023-11-06 22:57:15,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2638 transitions. [2023-11-06 22:57:15,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:57:15,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2638 transitions. [2023-11-06 22:57:15,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 85.09677419354838) internal successors, (2638), 31 states have internal predecessors, (2638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:15,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 200.0) internal successors, (6400), 32 states have internal predecessors, (6400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:15,378 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 200.0) internal successors, (6400), 32 states have internal predecessors, (6400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:15,378 INFO L175 Difference]: Start difference. First operand has 528 places, 1542 transitions, 41072 flow. Second operand 31 states and 2638 transitions. [2023-11-06 22:57:15,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 558 places, 2662 transitions, 75469 flow [2023-11-06 22:57:26,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 554 places, 2662 transitions, 74462 flow, removed 419 selfloop flow, removed 4 redundant places. [2023-11-06 22:57:26,298 INFO L231 Difference]: Finished difference. Result has 564 places, 2198 transitions, 61575 flow [2023-11-06 22:57:26,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=40429, PETRI_DIFFERENCE_MINUEND_PLACES=524, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=582, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=871, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=61575, PETRI_PLACES=564, PETRI_TRANSITIONS=2198} [2023-11-06 22:57:26,301 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 535 predicate places. [2023-11-06 22:57:26,301 INFO L495 AbstractCegarLoop]: Abstraction has has 564 places, 2198 transitions, 61575 flow [2023-11-06 22:57:26,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 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 22:57:26,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:57:26,302 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:57:26,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-06 22:57:26,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:57:26,508 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 22:57:26,509 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:57:26,509 INFO L85 PathProgramCache]: Analyzing trace with hash 159347358, now seen corresponding path program 25 times [2023-11-06 22:57:26,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:57:26,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699747154] [2023-11-06 22:57:26,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:57:26,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:57:26,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:57:26,832 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:57:26,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:57:26,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699747154] [2023-11-06 22:57:26,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699747154] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:57:26,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122314770] [2023-11-06 22:57:26,833 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:57:26,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:57:26,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:57:26,834 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:57:26,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-06 22:57:26,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:57:26,956 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 22:57:26,958 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:57:27,058 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:57:27,059 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:57:27,303 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:57:27,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122314770] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:57:27,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:57:27,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2023-11-06 22:57:27,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018157086] [2023-11-06 22:57:27,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:57:27,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 22:57:27,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:57:27,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 22:57:27,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:57:27,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 200 [2023-11-06 22:57:27,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 564 places, 2198 transitions, 61575 flow. Second operand has 20 states, 20 states have (on average 81.55) internal successors, (1631), 20 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:27,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:57:27,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 200 [2023-11-06 22:57:27,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:57:43,463 INFO L124 PetriNetUnfolderBase]: 6945/11384 cut-off events. [2023-11-06 22:57:43,463 INFO L125 PetriNetUnfolderBase]: For 335338/335338 co-relation queries the response was YES. [2023-11-06 22:57:43,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143806 conditions, 11384 events. 6945/11384 cut-off events. For 335338/335338 co-relation queries the response was YES. Maximal size of possible extension queue 820. Compared 81083 event pairs, 532 based on Foata normal form. 52/11436 useless extension candidates. Maximal degree in co-relation 143636. Up to 4670 conditions per place. [2023-11-06 22:57:43,726 INFO L140 encePairwiseOnDemand]: 194/200 looper letters, 1567 selfloop transitions, 1297 changer transitions 0/2864 dead transitions. [2023-11-06 22:57:43,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 626 places, 2864 transitions, 83458 flow [2023-11-06 22:57:43,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-11-06 22:57:43,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2023-11-06 22:57:43,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 5328 transitions. [2023-11-06 22:57:43,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4228571428571429 [2023-11-06 22:57:43,734 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 5328 transitions. [2023-11-06 22:57:43,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 5328 transitions. [2023-11-06 22:57:43,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:57:43,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 5328 transitions. [2023-11-06 22:57:43,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 84.57142857142857) internal successors, (5328), 63 states have internal predecessors, (5328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:43,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 200.0) internal successors, (12800), 64 states have internal predecessors, (12800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:43,750 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 200.0) internal successors, (12800), 64 states have internal predecessors, (12800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:43,751 INFO L175 Difference]: Start difference. First operand has 564 places, 2198 transitions, 61575 flow. Second operand 63 states and 5328 transitions. [2023-11-06 22:57:43,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 626 places, 2864 transitions, 83458 flow [2023-11-06 22:57:55,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 618 places, 2864 transitions, 81327 flow, removed 973 selfloop flow, removed 8 redundant places. [2023-11-06 22:57:55,594 INFO L231 Difference]: Finished difference. Result has 631 places, 2351 transitions, 67277 flow [2023-11-06 22:57:55,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=59894, PETRI_DIFFERENCE_MINUEND_PLACES=556, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1003, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=67277, PETRI_PLACES=631, PETRI_TRANSITIONS=2351} [2023-11-06 22:57:55,596 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 602 predicate places. [2023-11-06 22:57:55,596 INFO L495 AbstractCegarLoop]: Abstraction has has 631 places, 2351 transitions, 67277 flow [2023-11-06 22:57:55,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 81.55) internal successors, (1631), 20 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:55,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:57:55,597 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:57:55,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-11-06 22:57:55,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:57:55,797 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 22:57:55,798 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:57:55,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1832224392, now seen corresponding path program 26 times [2023-11-06 22:57:55,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:57:55,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564009580] [2023-11-06 22:57:55,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:57:55,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:57:55,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:57:56,033 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:57:56,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:57:56,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564009580] [2023-11-06 22:57:56,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564009580] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:57:56,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739204734] [2023-11-06 22:57:56,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:57:56,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:57:56,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:57:56,038 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:57:56,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc95a5b6-250b-4a3c-8b1c-85967b6cbb9f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-06 22:57:56,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:57:56,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:57:56,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 22:57:56,177 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:57:56,281 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:57:56,281 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:57:56,567 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:57:56,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739204734] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:57:56,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:57:56,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2023-11-06 22:57:56,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984010861] [2023-11-06 22:57:56,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:57:56,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-06 22:57:56,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:57:56,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-06 22:57:56,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2023-11-06 22:57:56,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 200 [2023-11-06 22:57:56,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 631 places, 2351 transitions, 67277 flow. Second operand has 23 states, 23 states have (on average 81.47826086956522) internal successors, (1874), 23 states have internal predecessors, (1874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:57:56,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:57:56,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 200 [2023-11-06 22:57:56,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:58:03,134 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:58:25,608 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 22:58:29,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []