./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version cf1a7837 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_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fe7fc3189e39cd6587b4d7d83621bd29f6e1c085e1b3af197b9abc1746b629ea --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:18:30,964 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:18:31,068 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-12 02:18:31,077 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:18:31,077 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:18:31,121 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:18:31,125 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:18:31,125 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:18:31,126 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:18:31,131 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:18:31,132 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:18:31,133 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:18:31,133 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:18:31,135 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:18:31,136 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:18:31,136 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:18:31,137 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:18:31,137 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:18:31,137 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-12 02:18:31,138 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-12 02:18:31,138 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-12 02:18:31,145 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:18:31,145 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-12 02:18:31,145 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 02:18:31,146 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:18:31,146 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:18:31,147 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:18:31,147 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:18:31,148 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:18:31,148 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:18:31,150 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:18:31,150 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:18:31,150 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:18:31,150 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:18:31,151 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:18:31,151 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:18:31,151 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:18:31,151 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:18:31,152 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_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fe7fc3189e39cd6587b4d7d83621bd29f6e1c085e1b3af197b9abc1746b629ea [2023-11-12 02:18:31,472 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:18:31,504 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:18:31,510 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:18:31,511 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:18:31,512 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:18:31,514 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2023-11-12 02:18:34,716 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:18:34,968 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:18:34,968 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2023-11-12 02:18:34,976 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/data/6ef0c04a9/165b787e82ec4297a53843219e4f2be7/FLAG6794fb3cb [2023-11-12 02:18:34,991 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/data/6ef0c04a9/165b787e82ec4297a53843219e4f2be7 [2023-11-12 02:18:34,994 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:18:34,996 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:18:34,998 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:18:34,998 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:18:35,005 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:18:35,006 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:18:34" (1/1) ... [2023-11-12 02:18:35,008 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4011df6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:18:35, skipping insertion in model container [2023-11-12 02:18:35,008 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:18:34" (1/1) ... [2023-11-12 02:18:35,037 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:18:35,219 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:18:35,229 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:18:35,252 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:18:35,262 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:18:35,262 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:18:35,270 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:18:35,271 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:18:35 WrapperNode [2023-11-12 02:18:35,271 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:18:35,272 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:18:35,273 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:18:35,273 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:18:35,281 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:18:35" (1/1) ... [2023-11-12 02:18:35,291 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:18:35" (1/1) ... [2023-11-12 02:18:35,317 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 55 [2023-11-12 02:18:35,318 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:18:35,319 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:18:35,319 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:18:35,319 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:18:35,327 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:18:35" (1/1) ... [2023-11-12 02:18:35,327 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:18:35" (1/1) ... [2023-11-12 02:18:35,330 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:18:35" (1/1) ... [2023-11-12 02:18:35,331 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:18:35" (1/1) ... [2023-11-12 02:18:35,337 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:18:35" (1/1) ... [2023-11-12 02:18:35,341 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:18:35" (1/1) ... [2023-11-12 02:18:35,343 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:18:35" (1/1) ... [2023-11-12 02:18:35,345 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:18:35" (1/1) ... [2023-11-12 02:18:35,348 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:18:35,349 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:18:35,350 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:18:35,350 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:18:35,351 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:18:35" (1/1) ... [2023-11-12 02:18:35,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:18:35,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:18:35,393 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:18:35,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:18:35,448 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:18:35,448 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-12 02:18:35,449 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-12 02:18:35,450 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-12 02:18:35,450 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-12 02:18:35,451 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:18:35,451 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:18:35,451 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:18:35,451 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-12 02:18:35,452 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-12 02:18:35,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:18:35,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:18:35,452 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:18:35,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:18:35,454 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-12 02:18:35,609 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:18:35,612 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:18:35,915 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:18:35,970 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:18:35,971 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-12 02:18:35,973 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:18:35 BoogieIcfgContainer [2023-11-12 02:18:35,974 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:18:35,977 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:18:35,977 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:18:35,985 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:18:35,985 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:18:34" (1/3) ... [2023-11-12 02:18:35,986 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24dbb6ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:18:35, skipping insertion in model container [2023-11-12 02:18:35,987 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:18:35" (2/3) ... [2023-11-12 02:18:35,988 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24dbb6ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:18:35, skipping insertion in model container [2023-11-12 02:18:35,988 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:18:35" (3/3) ... [2023-11-12 02:18:35,990 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr.wvr.c [2023-11-12 02:18:36,010 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:18:36,010 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-11-12 02:18:36,010 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:18:36,091 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-12 02:18:36,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 98 places, 97 transitions, 208 flow [2023-11-12 02:18:36,201 INFO L124 PetriNetUnfolderBase]: 6/95 cut-off events. [2023-11-12 02:18:36,201 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:18:36,207 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 83 event pairs, 0 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2023-11-12 02:18:36,207 INFO L82 GeneralOperation]: Start removeDead. Operand has 98 places, 97 transitions, 208 flow [2023-11-12 02:18:36,213 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 91 places, 90 transitions, 192 flow [2023-11-12 02:18:36,218 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:18:36,234 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 91 places, 90 transitions, 192 flow [2023-11-12 02:18:36,249 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 91 places, 90 transitions, 192 flow [2023-11-12 02:18:36,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 91 places, 90 transitions, 192 flow [2023-11-12 02:18:36,278 INFO L124 PetriNetUnfolderBase]: 6/90 cut-off events. [2023-11-12 02:18:36,279 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:18:36,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 90 events. 6/90 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 82 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2023-11-12 02:18:36,282 INFO L119 LiptonReduction]: Number of co-enabled transitions 664 [2023-11-12 02:18:40,023 INFO L134 LiptonReduction]: Checked pairs total: 734 [2023-11-12 02:18:40,023 INFO L136 LiptonReduction]: Total number of compositions: 96 [2023-11-12 02:18:40,044 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:18:40,057 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;@6cd78108, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:18:40,057 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-11-12 02:18:40,060 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:18:40,061 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-11-12 02:18:40,061 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:18:40,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:18:40,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-12 02:18:40,063 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)] === [2023-11-12 02:18:40,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:18:40,070 INFO L85 PathProgramCache]: Analyzing trace with hash 392, now seen corresponding path program 1 times [2023-11-12 02:18:40,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:18:40,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417898613] [2023-11-12 02:18:40,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:40,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:18:40,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:40,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:40,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:18:40,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417898613] [2023-11-12 02:18:40,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417898613] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:18:40,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:18:40,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-12 02:18:40,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278270745] [2023-11-12 02:18:40,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:18:40,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 02:18:40,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:18:40,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 02:18:40,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:18:40,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 193 [2023-11-12 02:18:40,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 60 flow. Second operand has 2 states, 2 states have (on average 86.5) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:40,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:18:40,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 193 [2023-11-12 02:18:40,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:18:40,409 INFO L124 PetriNetUnfolderBase]: 88/151 cut-off events. [2023-11-12 02:18:40,410 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-12 02:18:40,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 318 conditions, 151 events. 88/151 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 387 event pairs, 56 based on Foata normal form. 0/89 useless extension candidates. Maximal degree in co-relation 252. Up to 152 conditions per place. [2023-11-12 02:18:40,415 INFO L140 encePairwiseOnDemand]: 190/193 looper letters, 21 selfloop transitions, 0 changer transitions 0/21 dead transitions. [2023-11-12 02:18:40,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 21 transitions, 96 flow [2023-11-12 02:18:40,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 02:18:40,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-12 02:18:40,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 196 transitions. [2023-11-12 02:18:40,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5077720207253886 [2023-11-12 02:18:40,436 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 196 transitions. [2023-11-12 02:18:40,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 196 transitions. [2023-11-12 02:18:40,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:18:40,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 196 transitions. [2023-11-12 02:18:40,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 98.0) internal successors, (196), 2 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:40,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 193.0) internal successors, (579), 3 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) [2023-11-12 02:18:40,456 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 193.0) internal successors, (579), 3 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) [2023-11-12 02:18:40,458 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 60 flow. Second operand 2 states and 196 transitions. [2023-11-12 02:18:40,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 21 transitions, 96 flow [2023-11-12 02:18:40,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 21 transitions, 88 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-12 02:18:40,465 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 46 flow [2023-11-12 02:18:40,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, 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} [2023-11-12 02:18:40,472 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2023-11-12 02:18:40,473 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 46 flow [2023-11-12 02:18:40,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 86.5) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:40,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:18:40,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-12 02:18:40,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:18:40,474 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:18:40,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:18:40,476 INFO L85 PathProgramCache]: Analyzing trace with hash 384211, now seen corresponding path program 1 times [2023-11-12 02:18:40,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:18:40,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188175517] [2023-11-12 02:18:40,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:40,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:18:40,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:40,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:40,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:18:40,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188175517] [2023-11-12 02:18:40,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188175517] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:18:40,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:18:40,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:18:40,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033429619] [2023-11-12 02:18:40,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:18:40,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:18:40,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:18:40,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:18:40,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:18:40,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 193 [2023-11-12 02:18:40,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:40,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:18:40,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 193 [2023-11-12 02:18:40,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:18:40,912 INFO L124 PetriNetUnfolderBase]: 82/139 cut-off events. [2023-11-12 02:18:40,913 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-12 02:18:40,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 139 events. 82/139 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 339 event pairs, 52 based on Foata normal form. 0/85 useless extension candidates. Maximal degree in co-relation 282. Up to 139 conditions per place. [2023-11-12 02:18:40,915 INFO L140 encePairwiseOnDemand]: 190/193 looper letters, 18 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2023-11-12 02:18:40,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 80 flow [2023-11-12 02:18:40,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:18:40,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:18:40,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 261 transitions. [2023-11-12 02:18:40,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45077720207253885 [2023-11-12 02:18:40,919 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 261 transitions. [2023-11-12 02:18:40,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 261 transitions. [2023-11-12 02:18:40,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:18:40,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 261 transitions. [2023-11-12 02:18:40,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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) [2023-11-12 02:18:40,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:40,924 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:40,925 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 46 flow. Second operand 3 states and 261 transitions. [2023-11-12 02:18:40,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 19 transitions, 80 flow [2023-11-12 02:18:40,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 19 transitions, 80 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:18:40,926 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 44 flow [2023-11-12 02:18:40,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, 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} [2023-11-12 02:18:40,927 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2023-11-12 02:18:40,928 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 44 flow [2023-11-12 02:18:40,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:40,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:18:40,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-12 02:18:40,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:18:40,929 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-11-12 02:18:40,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:18:40,930 INFO L85 PathProgramCache]: Analyzing trace with hash 384210, now seen corresponding path program 1 times [2023-11-12 02:18:40,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:18:40,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926363152] [2023-11-12 02:18:40,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:40,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:18:40,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:40,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:40,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:18:40,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926363152] [2023-11-12 02:18:40,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926363152] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:18:40,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:18:40,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:18:40,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390378958] [2023-11-12 02:18:40,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:18:40,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:18:40,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:18:40,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:18:40,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:18:41,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 193 [2023-11-12 02:18:41,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:41,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:18:41,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 193 [2023-11-12 02:18:41,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:18:41,098 INFO L124 PetriNetUnfolderBase]: 76/127 cut-off events. [2023-11-12 02:18:41,098 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-12 02:18:41,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 127 events. 76/127 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 299 event pairs, 48 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 259. Up to 127 conditions per place. [2023-11-12 02:18:41,102 INFO L140 encePairwiseOnDemand]: 190/193 looper letters, 16 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2023-11-12 02:18:41,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 17 transitions, 74 flow [2023-11-12 02:18:41,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:18:41,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:18:41,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 247 transitions. [2023-11-12 02:18:41,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4265975820379965 [2023-11-12 02:18:41,109 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 247 transitions. [2023-11-12 02:18:41,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 247 transitions. [2023-11-12 02:18:41,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:18:41,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 247 transitions. [2023-11-12 02:18:41,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:41,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:41,117 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:41,117 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 44 flow. Second operand 3 states and 247 transitions. [2023-11-12 02:18:41,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 17 transitions, 74 flow [2023-11-12 02:18:41,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 17 transitions, 73 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:18:41,119 INFO L231 Difference]: Finished difference. Result has 22 places, 17 transitions, 41 flow [2023-11-12 02:18:41,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, 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} [2023-11-12 02:18:41,122 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-11-12 02:18:41,122 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 17 transitions, 41 flow [2023-11-12 02:18:41,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:41,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:18:41,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 02:18:41,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:18:41,128 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)] === [2023-11-12 02:18:41,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:18:41,130 INFO L85 PathProgramCache]: Analyzing trace with hash 369233352, now seen corresponding path program 1 times [2023-11-12 02:18:41,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:18:41,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513719121] [2023-11-12 02:18:41,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:41,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:18:41,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:41,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:41,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:18:41,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513719121] [2023-11-12 02:18:41,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513719121] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:18:41,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:18:41,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:18:41,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774190118] [2023-11-12 02:18:41,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:18:41,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:18:41,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:18:41,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:18:41,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:18:41,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 193 [2023-11-12 02:18:41,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 41 flow. Second operand has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:41,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:18:41,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 193 [2023-11-12 02:18:41,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:18:41,339 INFO L124 PetriNetUnfolderBase]: 58/100 cut-off events. [2023-11-12 02:18:41,339 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-12 02:18:41,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 100 events. 58/100 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 209 event pairs, 36 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 206. Up to 100 conditions per place. [2023-11-12 02:18:41,340 INFO L140 encePairwiseOnDemand]: 191/193 looper letters, 15 selfloop transitions, 1 changer transitions 0/16 dead transitions. [2023-11-12 02:18:41,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 16 transitions, 71 flow [2023-11-12 02:18:41,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:18:41,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:18:41,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 248 transitions. [2023-11-12 02:18:41,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4283246977547496 [2023-11-12 02:18:41,343 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 248 transitions. [2023-11-12 02:18:41,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 248 transitions. [2023-11-12 02:18:41,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:18:41,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 248 transitions. [2023-11-12 02:18:41,345 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) [2023-11-12 02:18:41,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:41,348 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:41,348 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 41 flow. Second operand 3 states and 248 transitions. [2023-11-12 02:18:41,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 16 transitions, 71 flow [2023-11-12 02:18:41,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 16 transitions, 70 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:18:41,350 INFO L231 Difference]: Finished difference. Result has 22 places, 16 transitions, 40 flow [2023-11-12 02:18:41,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, 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} [2023-11-12 02:18:41,351 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-11-12 02:18:41,351 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 16 transitions, 40 flow [2023-11-12 02:18:41,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:41,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:18:41,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 02:18:41,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 02:18:41,353 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)] === [2023-11-12 02:18:41,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:18:41,353 INFO L85 PathProgramCache]: Analyzing trace with hash 369233353, now seen corresponding path program 1 times [2023-11-12 02:18:41,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:18:41,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507782413] [2023-11-12 02:18:41,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:41,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:18:41,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:41,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:41,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:18:41,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507782413] [2023-11-12 02:18:41,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507782413] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:18:41,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:18:41,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:18:41,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96358401] [2023-11-12 02:18:41,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:18:41,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:18:41,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:18:41,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:18:41,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:18:41,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 193 [2023-11-12 02:18:41,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 16 transitions, 40 flow. Second operand has 4 states, 4 states have (on average 73.25) internal successors, (293), 4 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:41,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:18:41,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 193 [2023-11-12 02:18:41,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:18:41,661 INFO L124 PetriNetUnfolderBase]: 40/73 cut-off events. [2023-11-12 02:18:41,662 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-12 02:18:41,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 73 events. 40/73 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 127 event pairs, 24 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 153. Up to 73 conditions per place. [2023-11-12 02:18:41,663 INFO L140 encePairwiseOnDemand]: 191/193 looper letters, 14 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2023-11-12 02:18:41,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 15 transitions, 68 flow [2023-11-12 02:18:41,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:18:41,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:18:41,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 232 transitions. [2023-11-12 02:18:41,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4006908462867012 [2023-11-12 02:18:41,665 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 232 transitions. [2023-11-12 02:18:41,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 232 transitions. [2023-11-12 02:18:41,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:18:41,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 232 transitions. [2023-11-12 02:18:41,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:41,670 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:41,672 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:41,672 INFO L175 Difference]: Start difference. First operand has 22 places, 16 transitions, 40 flow. Second operand 3 states and 232 transitions. [2023-11-12 02:18:41,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 15 transitions, 68 flow [2023-11-12 02:18:41,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 15 transitions, 67 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:18:41,673 INFO L231 Difference]: Finished difference. Result has 22 places, 15 transitions, 39 flow [2023-11-12 02:18:41,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, 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} [2023-11-12 02:18:41,674 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2023-11-12 02:18:41,674 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 15 transitions, 39 flow [2023-11-12 02:18:41,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 73.25) internal successors, (293), 4 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:41,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:18:41,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:18:41,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 02:18:41,676 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)] === [2023-11-12 02:18:41,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:18:41,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1348658826, now seen corresponding path program 1 times [2023-11-12 02:18:41,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:18:41,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460955033] [2023-11-12 02:18:41,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:41,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:18:41,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:41,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:41,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:18:41,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460955033] [2023-11-12 02:18:41,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460955033] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:18:41,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:18:41,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:18:41,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131047476] [2023-11-12 02:18:41,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:18:41,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:18:41,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:18:41,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:18:41,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:18:41,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 193 [2023-11-12 02:18:41,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 15 transitions, 39 flow. Second operand has 4 states, 4 states have (on average 83.25) internal successors, (333), 4 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:41,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:18:41,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 193 [2023-11-12 02:18:41,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:18:41,843 INFO L124 PetriNetUnfolderBase]: 51/92 cut-off events. [2023-11-12 02:18:41,844 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-12 02:18:41,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 92 events. 51/92 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 196 event pairs, 24 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 193. Up to 73 conditions per place. [2023-11-12 02:18:41,845 INFO L140 encePairwiseOnDemand]: 189/193 looper letters, 19 selfloop transitions, 3 changer transitions 0/22 dead transitions. [2023-11-12 02:18:41,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 22 transitions, 98 flow [2023-11-12 02:18:41,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:18:41,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:18:41,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 343 transitions. [2023-11-12 02:18:41,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44430051813471505 [2023-11-12 02:18:41,848 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 343 transitions. [2023-11-12 02:18:41,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 343 transitions. [2023-11-12 02:18:41,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:18:41,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 343 transitions. [2023-11-12 02:18:41,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 85.75) internal successors, (343), 4 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:41,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 193.0) internal successors, (965), 5 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:41,855 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 193.0) internal successors, (965), 5 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:41,856 INFO L175 Difference]: Start difference. First operand has 22 places, 15 transitions, 39 flow. Second operand 4 states and 343 transitions. [2023-11-12 02:18:41,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 22 transitions, 98 flow [2023-11-12 02:18:41,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 22 transitions, 97 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:18:41,858 INFO L231 Difference]: Finished difference. Result has 25 places, 16 transitions, 52 flow [2023-11-12 02:18:41,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=52, PETRI_PLACES=25, PETRI_TRANSITIONS=16} [2023-11-12 02:18:41,861 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -4 predicate places. [2023-11-12 02:18:41,861 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 16 transitions, 52 flow [2023-11-12 02:18:41,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 83.25) internal successors, (333), 4 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:41,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:18:41,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:18:41,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 02:18:41,863 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)] === [2023-11-12 02:18:41,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:18:41,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1795396858, now seen corresponding path program 1 times [2023-11-12 02:18:41,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:18:41,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700145406] [2023-11-12 02:18:41,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:41,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:18:41,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:41,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:18:41,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:18:41,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700145406] [2023-11-12 02:18:41,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700145406] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:18:41,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:18:41,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:18:41,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808797914] [2023-11-12 02:18:41,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:18:41,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:18:41,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:18:41,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:18:41,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:18:42,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 193 [2023-11-12 02:18:42,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 16 transitions, 52 flow. Second operand has 4 states, 4 states have (on average 85.5) internal successors, (342), 4 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:42,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:18:42,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 193 [2023-11-12 02:18:42,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:18:42,074 INFO L124 PetriNetUnfolderBase]: 65/116 cut-off events. [2023-11-12 02:18:42,074 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2023-11-12 02:18:42,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297 conditions, 116 events. 65/116 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 277 event pairs, 33 based on Foata normal form. 0/96 useless extension candidates. Maximal degree in co-relation 292. Up to 92 conditions per place. [2023-11-12 02:18:42,079 INFO L140 encePairwiseOnDemand]: 189/193 looper letters, 21 selfloop transitions, 3 changer transitions 0/24 dead transitions. [2023-11-12 02:18:42,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 24 transitions, 127 flow [2023-11-12 02:18:42,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:18:42,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:18:42,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 351 transitions. [2023-11-12 02:18:42,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45466321243523317 [2023-11-12 02:18:42,082 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 351 transitions. [2023-11-12 02:18:42,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 351 transitions. [2023-11-12 02:18:42,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:18:42,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 351 transitions. [2023-11-12 02:18:42,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 87.75) internal successors, (351), 4 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:42,088 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 193.0) internal successors, (965), 5 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:42,090 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 193.0) internal successors, (965), 5 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:42,090 INFO L175 Difference]: Start difference. First operand has 25 places, 16 transitions, 52 flow. Second operand 4 states and 351 transitions. [2023-11-12 02:18:42,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 24 transitions, 127 flow [2023-11-12 02:18:42,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 24 transitions, 117 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-12 02:18:42,094 INFO L231 Difference]: Finished difference. Result has 27 places, 17 transitions, 60 flow [2023-11-12 02:18:42,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=60, PETRI_PLACES=27, PETRI_TRANSITIONS=17} [2023-11-12 02:18:42,095 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -2 predicate places. [2023-11-12 02:18:42,096 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 17 transitions, 60 flow [2023-11-12 02:18:42,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 85.5) internal successors, (342), 4 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:42,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:18:42,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:18:42,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 02:18:42,100 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)] === [2023-11-12 02:18:42,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:18:42,101 INFO L85 PathProgramCache]: Analyzing trace with hash 611269466, now seen corresponding path program 1 times [2023-11-12 02:18:42,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:18:42,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782020237] [2023-11-12 02:18:42,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:42,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:18:42,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:42,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:18:42,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:18:42,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782020237] [2023-11-12 02:18:42,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782020237] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:18:42,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428831561] [2023-11-12 02:18:42,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:42,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:18:42,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:18:42,270 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:18:42,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:18:42,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:42,366 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:18:42,371 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:18:42,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:18:42,424 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:18:42,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:42,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428831561] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 02:18:42,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:18:42,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [2, 2] total 4 [2023-11-12 02:18:42,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642700799] [2023-11-12 02:18:42,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:18:42,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:18:42,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:18:42,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:18:42,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:18:42,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 193 [2023-11-12 02:18:42,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 17 transitions, 60 flow. Second operand has 5 states, 5 states have (on average 88.0) internal successors, (440), 5 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:42,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:18:42,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 193 [2023-11-12 02:18:42,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:18:42,727 INFO L124 PetriNetUnfolderBase]: 117/211 cut-off events. [2023-11-12 02:18:42,728 INFO L125 PetriNetUnfolderBase]: For 86/86 co-relation queries the response was YES. [2023-11-12 02:18:42,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 590 conditions, 211 events. 117/211 cut-off events. For 86/86 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 665 event pairs, 19 based on Foata normal form. 1/166 useless extension candidates. Maximal degree in co-relation 584. Up to 77 conditions per place. [2023-11-12 02:18:42,730 INFO L140 encePairwiseOnDemand]: 189/193 looper letters, 32 selfloop transitions, 6 changer transitions 4/42 dead transitions. [2023-11-12 02:18:42,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 42 transitions, 228 flow [2023-11-12 02:18:42,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:18:42,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:18:42,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 379 transitions. [2023-11-12 02:18:42,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49093264248704666 [2023-11-12 02:18:42,733 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 379 transitions. [2023-11-12 02:18:42,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 379 transitions. [2023-11-12 02:18:42,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:18:42,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 379 transitions. [2023-11-12 02:18:42,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 94.75) internal successors, (379), 4 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:42,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 193.0) internal successors, (965), 5 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:42,737 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 193.0) internal successors, (965), 5 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:42,737 INFO L175 Difference]: Start difference. First operand has 27 places, 17 transitions, 60 flow. Second operand 4 states and 379 transitions. [2023-11-12 02:18:42,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 42 transitions, 228 flow [2023-11-12 02:18:42,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 42 transitions, 214 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-12 02:18:42,740 INFO L231 Difference]: Finished difference. Result has 30 places, 21 transitions, 98 flow [2023-11-12 02:18:42,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=98, PETRI_PLACES=30, PETRI_TRANSITIONS=21} [2023-11-12 02:18:42,744 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 1 predicate places. [2023-11-12 02:18:42,745 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 21 transitions, 98 flow [2023-11-12 02:18:42,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 88.0) internal successors, (440), 5 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:42,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:18:42,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:18:42,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:18:42,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:18:42,952 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)] === [2023-11-12 02:18:42,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:18:42,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1820435150, now seen corresponding path program 2 times [2023-11-12 02:18:42,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:18:42,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223924468] [2023-11-12 02:18:42,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:42,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:18:42,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:43,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:18:43,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:18:43,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223924468] [2023-11-12 02:18:43,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223924468] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:18:43,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529270957] [2023-11-12 02:18:43,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:18:43,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:18:43,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:18:43,078 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:18:43,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:18:43,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:18:43,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:18:43,159 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 02:18:43,160 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:18:43,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:18:43,233 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:18:43,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:18:43,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529270957] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:18:43,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:18:43,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-11-12 02:18:43,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622785193] [2023-11-12 02:18:43,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:18:43,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-12 02:18:43,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:18:43,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-12 02:18:43,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:18:43,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 193 [2023-11-12 02:18:43,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 21 transitions, 98 flow. Second operand has 11 states, 11 states have (on average 83.0) internal successors, (913), 11 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:43,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:18:43,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 193 [2023-11-12 02:18:43,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:18:43,612 INFO L124 PetriNetUnfolderBase]: 143/257 cut-off events. [2023-11-12 02:18:43,613 INFO L125 PetriNetUnfolderBase]: For 232/232 co-relation queries the response was YES. [2023-11-12 02:18:43,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 828 conditions, 257 events. 143/257 cut-off events. For 232/232 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 823 event pairs, 35 based on Foata normal form. 16/273 useless extension candidates. Maximal degree in co-relation 820. Up to 190 conditions per place. [2023-11-12 02:18:43,616 INFO L140 encePairwiseOnDemand]: 188/193 looper letters, 32 selfloop transitions, 8 changer transitions 0/40 dead transitions. [2023-11-12 02:18:43,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 40 transitions, 259 flow [2023-11-12 02:18:43,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:18:43,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:18:43,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 432 transitions. [2023-11-12 02:18:43,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44766839378238343 [2023-11-12 02:18:43,621 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 432 transitions. [2023-11-12 02:18:43,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 432 transitions. [2023-11-12 02:18:43,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:18:43,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 432 transitions. [2023-11-12 02:18:43,624 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) [2023-11-12 02:18:43,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 193.0) internal successors, (1158), 6 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:43,626 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 193.0) internal successors, (1158), 6 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:43,627 INFO L175 Difference]: Start difference. First operand has 30 places, 21 transitions, 98 flow. Second operand 5 states and 432 transitions. [2023-11-12 02:18:43,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 40 transitions, 259 flow [2023-11-12 02:18:43,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 40 transitions, 259 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:18:43,632 INFO L231 Difference]: Finished difference. Result has 37 places, 27 transitions, 172 flow [2023-11-12 02:18:43,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=172, PETRI_PLACES=37, PETRI_TRANSITIONS=27} [2023-11-12 02:18:43,634 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 8 predicate places. [2023-11-12 02:18:43,634 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 27 transitions, 172 flow [2023-11-12 02:18:43,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 83.0) internal successors, (913), 11 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:43,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:18:43,635 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:18:43,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:18:43,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:18:43,841 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)] === [2023-11-12 02:18:43,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:18:43,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1565034602, now seen corresponding path program 3 times [2023-11-12 02:18:43,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:18:43,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872573697] [2023-11-12 02:18:43,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:43,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:18:43,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:44,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:44,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:18:44,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872573697] [2023-11-12 02:18:44,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872573697] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:18:44,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947562921] [2023-11-12 02:18:44,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:18:44,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:18:44,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:18:44,069 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:18:44,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:18:44,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 02:18:44,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:18:44,155 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 02:18:44,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:18:44,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:44,250 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:18:44,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:44,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947562921] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:18:44,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:18:44,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-11-12 02:18:44,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124187244] [2023-11-12 02:18:44,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:18:44,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-12 02:18:44,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:18:44,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-12 02:18:44,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2023-11-12 02:18:44,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 193 [2023-11-12 02:18:44,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 27 transitions, 172 flow. Second operand has 16 states, 16 states have (on average 77.375) internal successors, (1238), 16 states have internal predecessors, (1238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:44,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:18:44,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 193 [2023-11-12 02:18:44,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:18:45,283 INFO L124 PetriNetUnfolderBase]: 209/372 cut-off events. [2023-11-12 02:18:45,283 INFO L125 PetriNetUnfolderBase]: For 633/633 co-relation queries the response was YES. [2023-11-12 02:18:45,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1412 conditions, 372 events. 209/372 cut-off events. For 633/633 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1357 event pairs, 8 based on Foata normal form. 12/384 useless extension candidates. Maximal degree in co-relation 1400. Up to 127 conditions per place. [2023-11-12 02:18:45,288 INFO L140 encePairwiseOnDemand]: 186/193 looper letters, 65 selfloop transitions, 43 changer transitions 19/127 dead transitions. [2023-11-12 02:18:45,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 127 transitions, 890 flow [2023-11-12 02:18:45,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-12 02:18:45,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-12 02:18:45,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1918 transitions. [2023-11-12 02:18:45,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41407599309153714 [2023-11-12 02:18:45,297 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1918 transitions. [2023-11-12 02:18:45,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1918 transitions. [2023-11-12 02:18:45,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:18:45,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1918 transitions. [2023-11-12 02:18:45,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 79.91666666666667) internal successors, (1918), 24 states have internal predecessors, (1918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:45,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 193.0) internal successors, (4825), 25 states have internal predecessors, (4825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:45,317 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 193.0) internal successors, (4825), 25 states have internal predecessors, (4825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:45,317 INFO L175 Difference]: Start difference. First operand has 37 places, 27 transitions, 172 flow. Second operand 24 states and 1918 transitions. [2023-11-12 02:18:45,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 127 transitions, 890 flow [2023-11-12 02:18:45,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 127 transitions, 872 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-11-12 02:18:45,324 INFO L231 Difference]: Finished difference. Result has 65 places, 61 transitions, 527 flow [2023-11-12 02:18:45,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=527, PETRI_PLACES=65, PETRI_TRANSITIONS=61} [2023-11-12 02:18:45,325 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 36 predicate places. [2023-11-12 02:18:45,325 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 61 transitions, 527 flow [2023-11-12 02:18:45,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 77.375) internal successors, (1238), 16 states have internal predecessors, (1238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:45,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:18:45,326 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:18:45,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:18:45,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 02:18:45,532 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)] === [2023-11-12 02:18:45,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:18:45,533 INFO L85 PathProgramCache]: Analyzing trace with hash 884807066, now seen corresponding path program 4 times [2023-11-12 02:18:45,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:18:45,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930433008] [2023-11-12 02:18:45,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:45,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:18:45,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:45,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:45,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:18:45,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930433008] [2023-11-12 02:18:45,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930433008] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:18:45,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795843422] [2023-11-12 02:18:45,696 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 02:18:45,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:18:45,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:18:45,697 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:18:45,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:18:45,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 02:18:45,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:18:45,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:18:45,775 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:18:45,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:45,894 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:18:45,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:45,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795843422] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:18:45,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:18:45,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-12 02:18:45,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488971489] [2023-11-12 02:18:45,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:18:45,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-12 02:18:45,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:18:45,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-12 02:18:45,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-11-12 02:18:46,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 193 [2023-11-12 02:18:46,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 61 transitions, 527 flow. Second operand has 15 states, 15 states have (on average 77.4) internal successors, (1161), 15 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:46,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:18:46,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 193 [2023-11-12 02:18:46,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:18:46,657 INFO L124 PetriNetUnfolderBase]: 245/435 cut-off events. [2023-11-12 02:18:46,658 INFO L125 PetriNetUnfolderBase]: For 2414/2414 co-relation queries the response was YES. [2023-11-12 02:18:46,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2158 conditions, 435 events. 245/435 cut-off events. For 2414/2414 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1612 event pairs, 11 based on Foata normal form. 30/465 useless extension candidates. Maximal degree in co-relation 2140. Up to 157 conditions per place. [2023-11-12 02:18:46,664 INFO L140 encePairwiseOnDemand]: 186/193 looper letters, 75 selfloop transitions, 62 changer transitions 0/137 dead transitions. [2023-11-12 02:18:46,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 137 transitions, 1308 flow [2023-11-12 02:18:46,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-12 02:18:46,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-12 02:18:46,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1518 transitions. [2023-11-12 02:18:46,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41396236705754025 [2023-11-12 02:18:46,672 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1518 transitions. [2023-11-12 02:18:46,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1518 transitions. [2023-11-12 02:18:46,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:18:46,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1518 transitions. [2023-11-12 02:18:46,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 79.89473684210526) internal successors, (1518), 19 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:46,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 193.0) internal successors, (3860), 20 states have internal predecessors, (3860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:46,686 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 193.0) internal successors, (3860), 20 states have internal predecessors, (3860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:46,686 INFO L175 Difference]: Start difference. First operand has 65 places, 61 transitions, 527 flow. Second operand 19 states and 1518 transitions. [2023-11-12 02:18:46,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 137 transitions, 1308 flow [2023-11-12 02:18:46,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 137 transitions, 1057 flow, removed 112 selfloop flow, removed 6 redundant places. [2023-11-12 02:18:46,701 INFO L231 Difference]: Finished difference. Result has 84 places, 98 transitions, 853 flow [2023-11-12 02:18:46,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=853, PETRI_PLACES=84, PETRI_TRANSITIONS=98} [2023-11-12 02:18:46,702 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 55 predicate places. [2023-11-12 02:18:46,702 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 98 transitions, 853 flow [2023-11-12 02:18:46,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 77.4) internal successors, (1161), 15 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:46,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:18:46,703 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:18:46,721 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-12 02:18:46,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-12 02:18:46,909 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)] === [2023-11-12 02:18:46,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:18:46,909 INFO L85 PathProgramCache]: Analyzing trace with hash -407821926, now seen corresponding path program 5 times [2023-11-12 02:18:46,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:18:46,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928540687] [2023-11-12 02:18:46,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:46,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:18:46,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:47,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:47,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:18:47,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928540687] [2023-11-12 02:18:47,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928540687] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:18:47,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137315660] [2023-11-12 02:18:47,086 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-12 02:18:47,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:18:47,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:18:47,087 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:18:47,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:18:47,177 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-12 02:18:47,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:18:47,179 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:18:47,181 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:18:47,281 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:47,281 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:18:47,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:47,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137315660] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:18:47,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:18:47,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-12 02:18:47,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544878692] [2023-11-12 02:18:47,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:18:47,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-12 02:18:47,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:18:47,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-12 02:18:47,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2023-11-12 02:18:47,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 193 [2023-11-12 02:18:47,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 98 transitions, 853 flow. Second operand has 15 states, 15 states have (on average 77.0) internal successors, (1155), 15 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:47,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:18:47,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 193 [2023-11-12 02:18:47,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:18:47,992 INFO L124 PetriNetUnfolderBase]: 338/578 cut-off events. [2023-11-12 02:18:47,992 INFO L125 PetriNetUnfolderBase]: For 5779/5779 co-relation queries the response was YES. [2023-11-12 02:18:47,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3254 conditions, 578 events. 338/578 cut-off events. For 5779/5779 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2257 event pairs, 13 based on Foata normal form. 16/594 useless extension candidates. Maximal degree in co-relation 3228. Up to 262 conditions per place. [2023-11-12 02:18:48,002 INFO L140 encePairwiseOnDemand]: 186/193 looper letters, 82 selfloop transitions, 95 changer transitions 2/179 dead transitions. [2023-11-12 02:18:48,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 179 transitions, 1887 flow [2023-11-12 02:18:48,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-12 02:18:48,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-12 02:18:48,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1668 transitions. [2023-11-12 02:18:48,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41154700222057733 [2023-11-12 02:18:48,009 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1668 transitions. [2023-11-12 02:18:48,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1668 transitions. [2023-11-12 02:18:48,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:18:48,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1668 transitions. [2023-11-12 02:18:48,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 79.42857142857143) internal successors, (1668), 21 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:48,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 193.0) internal successors, (4246), 22 states have internal predecessors, (4246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:48,026 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 193.0) internal successors, (4246), 22 states have internal predecessors, (4246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:48,026 INFO L175 Difference]: Start difference. First operand has 84 places, 98 transitions, 853 flow. Second operand 21 states and 1668 transitions. [2023-11-12 02:18:48,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 179 transitions, 1887 flow [2023-11-12 02:18:48,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 179 transitions, 1775 flow, removed 56 selfloop flow, removed 0 redundant places. [2023-11-12 02:18:48,064 INFO L231 Difference]: Finished difference. Result has 111 places, 141 transitions, 1514 flow [2023-11-12 02:18:48,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=749, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1514, PETRI_PLACES=111, PETRI_TRANSITIONS=141} [2023-11-12 02:18:48,065 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 82 predicate places. [2023-11-12 02:18:48,065 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 141 transitions, 1514 flow [2023-11-12 02:18:48,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 77.0) internal successors, (1155), 15 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:48,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:18:48,066 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:18:48,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:18:48,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-12 02:18:48,272 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)] === [2023-11-12 02:18:48,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:18:48,274 INFO L85 PathProgramCache]: Analyzing trace with hash -409011218, now seen corresponding path program 6 times [2023-11-12 02:18:48,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:18:48,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826557450] [2023-11-12 02:18:48,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:48,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:18:48,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:48,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:48,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:18:48,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826557450] [2023-11-12 02:18:48,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826557450] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:18:48,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782619101] [2023-11-12 02:18:48,446 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-12 02:18:48,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:18:48,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:18:48,447 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:18:48,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:18:48,542 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-12 02:18:48,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:18:48,543 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 02:18:48,545 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:18:48,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:48,642 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:18:48,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:48,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782619101] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:18:48,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:18:48,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-11-12 02:18:48,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292946465] [2023-11-12 02:18:48,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:18:48,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-12 02:18:48,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:18:48,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-12 02:18:48,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2023-11-12 02:18:48,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 193 [2023-11-12 02:18:48,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 141 transitions, 1514 flow. Second operand has 16 states, 16 states have (on average 77.25) internal successors, (1236), 16 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:48,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:18:48,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 193 [2023-11-12 02:18:48,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:18:49,645 INFO L124 PetriNetUnfolderBase]: 348/618 cut-off events. [2023-11-12 02:18:49,645 INFO L125 PetriNetUnfolderBase]: For 9245/9245 co-relation queries the response was YES. [2023-11-12 02:18:49,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3585 conditions, 618 events. 348/618 cut-off events. For 9245/9245 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2600 event pairs, 7 based on Foata normal form. 30/648 useless extension candidates. Maximal degree in co-relation 3551. Up to 214 conditions per place. [2023-11-12 02:18:49,657 INFO L140 encePairwiseOnDemand]: 186/193 looper letters, 73 selfloop transitions, 109 changer transitions 3/185 dead transitions. [2023-11-12 02:18:49,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 185 transitions, 2087 flow [2023-11-12 02:18:49,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-12 02:18:49,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-12 02:18:49,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1828 transitions. [2023-11-12 02:18:49,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4118044604640685 [2023-11-12 02:18:49,665 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1828 transitions. [2023-11-12 02:18:49,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1828 transitions. [2023-11-12 02:18:49,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:18:49,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1828 transitions. [2023-11-12 02:18:49,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 79.47826086956522) internal successors, (1828), 23 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:49,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 193.0) internal successors, (4632), 24 states have internal predecessors, (4632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:49,683 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 193.0) internal successors, (4632), 24 states have internal predecessors, (4632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:49,684 INFO L175 Difference]: Start difference. First operand has 111 places, 141 transitions, 1514 flow. Second operand 23 states and 1828 transitions. [2023-11-12 02:18:49,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 185 transitions, 2087 flow [2023-11-12 02:18:49,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 185 transitions, 1844 flow, removed 102 selfloop flow, removed 9 redundant places. [2023-11-12 02:18:49,757 INFO L231 Difference]: Finished difference. Result has 127 places, 142 transitions, 1582 flow [2023-11-12 02:18:49,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=1205, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1582, PETRI_PLACES=127, PETRI_TRANSITIONS=142} [2023-11-12 02:18:49,758 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 98 predicate places. [2023-11-12 02:18:49,759 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 142 transitions, 1582 flow [2023-11-12 02:18:49,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 77.25) internal successors, (1236), 16 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:49,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:18:49,760 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:18:49,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:18:49,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-12 02:18:49,966 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)] === [2023-11-12 02:18:49,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:18:49,966 INFO L85 PathProgramCache]: Analyzing trace with hash 289531286, now seen corresponding path program 7 times [2023-11-12 02:18:49,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:18:49,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61771472] [2023-11-12 02:18:49,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:49,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:18:49,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:50,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:50,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:18:50,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61771472] [2023-11-12 02:18:50,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61771472] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:18:50,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849417844] [2023-11-12 02:18:50,115 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 02:18:50,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:18:50,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:18:50,117 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:18:50,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:18:50,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:50,224 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 02:18:50,226 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:18:50,332 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:50,332 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:18:50,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:50,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849417844] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:18:50,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:18:50,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-11-12 02:18:50,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462640014] [2023-11-12 02:18:50,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:18:50,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-12 02:18:50,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:18:50,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-12 02:18:50,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2023-11-12 02:18:50,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 193 [2023-11-12 02:18:50,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 142 transitions, 1582 flow. Second operand has 18 states, 18 states have (on average 77.27777777777777) internal successors, (1391), 18 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:50,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:18:50,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 193 [2023-11-12 02:18:50,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:18:51,428 INFO L124 PetriNetUnfolderBase]: 495/871 cut-off events. [2023-11-12 02:18:51,428 INFO L125 PetriNetUnfolderBase]: For 4489/4489 co-relation queries the response was YES. [2023-11-12 02:18:51,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4970 conditions, 871 events. 495/871 cut-off events. For 4489/4489 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4015 event pairs, 15 based on Foata normal form. 10/881 useless extension candidates. Maximal degree in co-relation 4935. Up to 262 conditions per place. [2023-11-12 02:18:51,492 INFO L140 encePairwiseOnDemand]: 186/193 looper letters, 110 selfloop transitions, 150 changer transitions 0/260 dead transitions. [2023-11-12 02:18:51,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 260 transitions, 3070 flow [2023-11-12 02:18:51,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-12 02:18:51,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-12 02:18:51,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2298 transitions. [2023-11-12 02:18:51,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41057709487225297 [2023-11-12 02:18:51,498 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2298 transitions. [2023-11-12 02:18:51,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2298 transitions. [2023-11-12 02:18:51,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:18:51,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2298 transitions. [2023-11-12 02:18:51,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 79.24137931034483) internal successors, (2298), 29 states have internal predecessors, (2298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:51,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 193.0) internal successors, (5790), 30 states have internal predecessors, (5790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:51,516 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 193.0) internal successors, (5790), 30 states have internal predecessors, (5790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:51,517 INFO L175 Difference]: Start difference. First operand has 127 places, 142 transitions, 1582 flow. Second operand 29 states and 2298 transitions. [2023-11-12 02:18:51,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 260 transitions, 3070 flow [2023-11-12 02:18:51,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 260 transitions, 2834 flow, removed 21 selfloop flow, removed 17 redundant places. [2023-11-12 02:18:51,554 INFO L231 Difference]: Finished difference. Result has 144 places, 208 transitions, 2588 flow [2023-11-12 02:18:51,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=1433, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2588, PETRI_PLACES=144, PETRI_TRANSITIONS=208} [2023-11-12 02:18:51,555 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 115 predicate places. [2023-11-12 02:18:51,555 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 208 transitions, 2588 flow [2023-11-12 02:18:51,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 77.27777777777777) internal successors, (1391), 18 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:51,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:18:51,557 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:18:51,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:18:51,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-12 02:18:51,762 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)] === [2023-11-12 02:18:51,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:18:51,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1750731040, now seen corresponding path program 8 times [2023-11-12 02:18:51,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:18:51,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898843883] [2023-11-12 02:18:51,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:51,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:18:51,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:51,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:51,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:18:51,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898843883] [2023-11-12 02:18:51,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898843883] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:18:51,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985894873] [2023-11-12 02:18:51,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:18:51,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:18:51,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:18:51,895 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:18:51,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:18:51,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:18:51,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:18:51,984 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 02:18:51,985 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:18:52,107 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:52,107 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:18:52,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:52,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985894873] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:18:52,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:18:52,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-11-12 02:18:52,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478535933] [2023-11-12 02:18:52,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:18:52,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-12 02:18:52,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:18:52,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-12 02:18:52,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2023-11-12 02:18:52,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 193 [2023-11-12 02:18:52,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 208 transitions, 2588 flow. Second operand has 18 states, 18 states have (on average 77.33333333333333) internal successors, (1392), 18 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) [2023-11-12 02:18:52,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:18:52,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 193 [2023-11-12 02:18:52,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:18:53,220 INFO L124 PetriNetUnfolderBase]: 579/1033 cut-off events. [2023-11-12 02:18:53,221 INFO L125 PetriNetUnfolderBase]: For 7847/7847 co-relation queries the response was YES. [2023-11-12 02:18:53,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6548 conditions, 1033 events. 579/1033 cut-off events. For 7847/7847 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 5079 event pairs, 19 based on Foata normal form. 42/1075 useless extension candidates. Maximal degree in co-relation 6510. Up to 731 conditions per place. [2023-11-12 02:18:53,236 INFO L140 encePairwiseOnDemand]: 186/193 looper letters, 211 selfloop transitions, 78 changer transitions 1/290 dead transitions. [2023-11-12 02:18:53,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 290 transitions, 3872 flow [2023-11-12 02:18:53,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-12 02:18:53,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-12 02:18:53,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1916 transitions. [2023-11-12 02:18:53,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41364421416234887 [2023-11-12 02:18:53,244 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1916 transitions. [2023-11-12 02:18:53,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1916 transitions. [2023-11-12 02:18:53,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:18:53,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1916 transitions. [2023-11-12 02:18:53,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 79.83333333333333) internal successors, (1916), 24 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:53,256 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 193.0) internal successors, (4825), 25 states have internal predecessors, (4825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:53,258 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 193.0) internal successors, (4825), 25 states have internal predecessors, (4825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:53,258 INFO L175 Difference]: Start difference. First operand has 144 places, 208 transitions, 2588 flow. Second operand 24 states and 1916 transitions. [2023-11-12 02:18:53,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 290 transitions, 3872 flow [2023-11-12 02:18:53,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 290 transitions, 3708 flow, removed 42 selfloop flow, removed 13 redundant places. [2023-11-12 02:18:53,326 INFO L231 Difference]: Finished difference. Result has 165 places, 240 transitions, 3154 flow [2023-11-12 02:18:53,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=2426, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3154, PETRI_PLACES=165, PETRI_TRANSITIONS=240} [2023-11-12 02:18:53,327 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 136 predicate places. [2023-11-12 02:18:53,328 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 240 transitions, 3154 flow [2023-11-12 02:18:53,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 77.33333333333333) internal successors, (1392), 18 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) [2023-11-12 02:18:53,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:18:53,329 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:18:53,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 02:18:53,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-12 02:18:53,535 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)] === [2023-11-12 02:18:53,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:18:53,535 INFO L85 PathProgramCache]: Analyzing trace with hash 820184238, now seen corresponding path program 9 times [2023-11-12 02:18:53,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:18:53,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811133004] [2023-11-12 02:18:53,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:53,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:18:53,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:53,737 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:53,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:18:53,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811133004] [2023-11-12 02:18:53,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811133004] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:18:53,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592043701] [2023-11-12 02:18:53,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:18:53,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:18:53,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:18:53,739 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:18:53,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 02:18:53,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-12 02:18:53,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:18:53,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 02:18:53,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:18:53,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:53,926 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:18:54,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:54,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592043701] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:18:54,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:18:54,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-11-12 02:18:54,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889392438] [2023-11-12 02:18:54,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:18:54,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-12 02:18:54,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:18:54,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-12 02:18:54,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-11-12 02:18:54,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 193 [2023-11-12 02:18:54,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 240 transitions, 3154 flow. Second operand has 16 states, 16 states have (on average 77.25) internal successors, (1236), 16 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:54,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:18:54,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 193 [2023-11-12 02:18:54,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:18:54,634 INFO L124 PetriNetUnfolderBase]: 573/1007 cut-off events. [2023-11-12 02:18:54,634 INFO L125 PetriNetUnfolderBase]: For 9359/9359 co-relation queries the response was YES. [2023-11-12 02:18:54,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6892 conditions, 1007 events. 573/1007 cut-off events. For 9359/9359 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 4853 event pairs, 21 based on Foata normal form. 6/1013 useless extension candidates. Maximal degree in co-relation 6843. Up to 782 conditions per place. [2023-11-12 02:18:54,651 INFO L140 encePairwiseOnDemand]: 186/193 looper letters, 195 selfloop transitions, 69 changer transitions 4/268 dead transitions. [2023-11-12 02:18:54,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 268 transitions, 3989 flow [2023-11-12 02:18:54,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 02:18:54,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-12 02:18:54,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1110 transitions. [2023-11-12 02:18:54,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41080680977054035 [2023-11-12 02:18:54,655 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1110 transitions. [2023-11-12 02:18:54,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1110 transitions. [2023-11-12 02:18:54,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:18:54,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1110 transitions. [2023-11-12 02:18:54,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 79.28571428571429) internal successors, (1110), 14 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:54,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 193.0) internal successors, (2895), 15 states have internal predecessors, (2895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:54,663 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 193.0) internal successors, (2895), 15 states have internal predecessors, (2895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:54,664 INFO L175 Difference]: Start difference. First operand has 165 places, 240 transitions, 3154 flow. Second operand 14 states and 1110 transitions. [2023-11-12 02:18:54,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 268 transitions, 3989 flow [2023-11-12 02:18:54,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 268 transitions, 3712 flow, removed 110 selfloop flow, removed 9 redundant places. [2023-11-12 02:18:54,748 INFO L231 Difference]: Finished difference. Result has 171 places, 244 transitions, 3133 flow [2023-11-12 02:18:54,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=2895, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3133, PETRI_PLACES=171, PETRI_TRANSITIONS=244} [2023-11-12 02:18:54,749 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 142 predicate places. [2023-11-12 02:18:54,749 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 244 transitions, 3133 flow [2023-11-12 02:18:54,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 77.25) internal successors, (1236), 16 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:54,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:18:54,750 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:18:54,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 02:18:54,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:18:54,961 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)] === [2023-11-12 02:18:54,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:18:54,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1588557056, now seen corresponding path program 10 times [2023-11-12 02:18:54,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:18:54,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253148263] [2023-11-12 02:18:54,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:54,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:18:55,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:55,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:55,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:18:55,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253148263] [2023-11-12 02:18:55,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253148263] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:18:55,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056950278] [2023-11-12 02:18:55,146 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 02:18:55,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:18:55,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:18:55,149 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:18:55,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 02:18:55,234 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 02:18:55,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:18:55,235 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-12 02:18:55,237 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:18:55,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:55,270 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:18:55,395 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:55,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056950278] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:18:55,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:18:55,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 5] total 8 [2023-11-12 02:18:55,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330806902] [2023-11-12 02:18:55,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:18:55,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-12 02:18:55,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:18:55,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-12 02:18:55,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:18:55,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 193 [2023-11-12 02:18:55,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 244 transitions, 3133 flow. Second operand has 10 states, 10 states have (on average 83.4) internal successors, (834), 10 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:55,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:18:55,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 193 [2023-11-12 02:18:55,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:18:55,959 INFO L124 PetriNetUnfolderBase]: 836/1459 cut-off events. [2023-11-12 02:18:55,959 INFO L125 PetriNetUnfolderBase]: For 13330/13330 co-relation queries the response was YES. [2023-11-12 02:18:55,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9873 conditions, 1459 events. 836/1459 cut-off events. For 13330/13330 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 7656 event pairs, 32 based on Foata normal form. 1/1460 useless extension candidates. Maximal degree in co-relation 9823. Up to 767 conditions per place. [2023-11-12 02:18:55,982 INFO L140 encePairwiseOnDemand]: 189/193 looper letters, 239 selfloop transitions, 98 changer transitions 45/382 dead transitions. [2023-11-12 02:18:55,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 382 transitions, 5580 flow [2023-11-12 02:18:55,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:18:55,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:18:55,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 535 transitions. [2023-11-12 02:18:55,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4620034542314335 [2023-11-12 02:18:55,984 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 535 transitions. [2023-11-12 02:18:55,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 535 transitions. [2023-11-12 02:18:55,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:18:55,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 535 transitions. [2023-11-12 02:18:55,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 89.16666666666667) internal successors, (535), 6 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:55,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 193.0) internal successors, (1351), 7 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:55,988 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 193.0) internal successors, (1351), 7 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:55,988 INFO L175 Difference]: Start difference. First operand has 171 places, 244 transitions, 3133 flow. Second operand 6 states and 535 transitions. [2023-11-12 02:18:55,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 382 transitions, 5580 flow [2023-11-12 02:18:56,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 382 transitions, 5344 flow, removed 52 selfloop flow, removed 7 redundant places. [2023-11-12 02:18:56,101 INFO L231 Difference]: Finished difference. Result has 171 places, 294 transitions, 4074 flow [2023-11-12 02:18:56,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=2995, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4074, PETRI_PLACES=171, PETRI_TRANSITIONS=294} [2023-11-12 02:18:56,102 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 142 predicate places. [2023-11-12 02:18:56,103 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 294 transitions, 4074 flow [2023-11-12 02:18:56,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 83.4) internal successors, (834), 10 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:56,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:18:56,103 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:18:56,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-12 02:18:56,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:18:56,309 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)] === [2023-11-12 02:18:56,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:18:56,310 INFO L85 PathProgramCache]: Analyzing trace with hash -2069553024, now seen corresponding path program 11 times [2023-11-12 02:18:56,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:18:56,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029730233] [2023-11-12 02:18:56,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:56,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:18:56,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:56,413 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:18:56,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:18:56,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029730233] [2023-11-12 02:18:56,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029730233] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:18:56,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584235558] [2023-11-12 02:18:56,414 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-12 02:18:56,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:18:56,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:18:56,421 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:18:56,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-12 02:18:56,506 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-12 02:18:56,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:18:56,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 02:18:56,509 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:18:56,525 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:18:56,525 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:18:56,585 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:18:56,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584235558] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:18:56,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:18:56,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 6 [2023-11-12 02:18:56,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686390071] [2023-11-12 02:18:56,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:18:56,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:18:56,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:18:56,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:18:56,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:18:56,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 193 [2023-11-12 02:18:56,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 294 transitions, 4074 flow. Second operand has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:56,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:18:56,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 193 [2023-11-12 02:18:56,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:18:57,219 INFO L124 PetriNetUnfolderBase]: 789/1418 cut-off events. [2023-11-12 02:18:57,219 INFO L125 PetriNetUnfolderBase]: For 15652/15652 co-relation queries the response was YES. [2023-11-12 02:18:57,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10191 conditions, 1418 events. 789/1418 cut-off events. For 15652/15652 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 7695 event pairs, 53 based on Foata normal form. 26/1444 useless extension candidates. Maximal degree in co-relation 10138. Up to 1140 conditions per place. [2023-11-12 02:18:57,244 INFO L140 encePairwiseOnDemand]: 189/193 looper letters, 265 selfloop transitions, 62 changer transitions 15/342 dead transitions. [2023-11-12 02:18:57,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 342 transitions, 5297 flow [2023-11-12 02:18:57,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:18:57,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-12 02:18:57,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 620 transitions. [2023-11-12 02:18:57,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45891931902294597 [2023-11-12 02:18:57,247 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 620 transitions. [2023-11-12 02:18:57,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 620 transitions. [2023-11-12 02:18:57,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:18:57,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 620 transitions. [2023-11-12 02:18:57,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 88.57142857142857) internal successors, (620), 7 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:57,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 193.0) internal successors, (1544), 8 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:57,252 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 193.0) internal successors, (1544), 8 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:57,252 INFO L175 Difference]: Start difference. First operand has 171 places, 294 transitions, 4074 flow. Second operand 7 states and 620 transitions. [2023-11-12 02:18:57,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 342 transitions, 5297 flow [2023-11-12 02:18:57,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 342 transitions, 5225 flow, removed 22 selfloop flow, removed 3 redundant places. [2023-11-12 02:18:57,388 INFO L231 Difference]: Finished difference. Result has 178 places, 304 transitions, 4406 flow [2023-11-12 02:18:57,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=4017, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4406, PETRI_PLACES=178, PETRI_TRANSITIONS=304} [2023-11-12 02:18:57,389 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 149 predicate places. [2023-11-12 02:18:57,389 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 304 transitions, 4406 flow [2023-11-12 02:18:57,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:57,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:18:57,390 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:18:57,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-12 02:18:57,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:18:57,591 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)] === [2023-11-12 02:18:57,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:18:57,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1779078120, now seen corresponding path program 12 times [2023-11-12 02:18:57,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:18:57,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918144376] [2023-11-12 02:18:57,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:57,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:18:57,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:57,828 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:57,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:18:57,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918144376] [2023-11-12 02:18:57,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918144376] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:18:57,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052570158] [2023-11-12 02:18:57,830 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-12 02:18:57,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:18:57,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:18:57,831 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:18:57,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-12 02:18:57,945 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-12 02:18:57,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:18:57,947 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-12 02:18:57,949 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:18:58,123 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:58,124 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:18:58,505 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:58,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052570158] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:18:58,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:18:58,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-11-12 02:18:58,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675524906] [2023-11-12 02:18:58,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:18:58,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-12 02:18:58,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:18:58,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-12 02:18:58,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2023-11-12 02:18:58,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 193 [2023-11-12 02:18:58,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 304 transitions, 4406 flow. Second operand has 21 states, 21 states have (on average 77.19047619047619) internal successors, (1621), 21 states have internal predecessors, (1621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:58,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:18:58,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 193 [2023-11-12 02:18:58,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:19:00,026 INFO L124 PetriNetUnfolderBase]: 1040/1861 cut-off events. [2023-11-12 02:19:00,027 INFO L125 PetriNetUnfolderBase]: For 22871/22871 co-relation queries the response was YES. [2023-11-12 02:19:00,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13732 conditions, 1861 events. 1040/1861 cut-off events. For 22871/22871 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 10563 event pairs, 2 based on Foata normal form. 18/1879 useless extension candidates. Maximal degree in co-relation 13676. Up to 548 conditions per place. [2023-11-12 02:19:00,061 INFO L140 encePairwiseOnDemand]: 186/193 looper letters, 137 selfloop transitions, 348 changer transitions 34/519 dead transitions. [2023-11-12 02:19:00,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 519 transitions, 7951 flow [2023-11-12 02:19:00,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-12 02:19:00,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-12 02:19:00,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2709 transitions. [2023-11-12 02:19:00,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4128314538250533 [2023-11-12 02:19:00,069 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2709 transitions. [2023-11-12 02:19:00,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2709 transitions. [2023-11-12 02:19:00,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:19:00,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2709 transitions. [2023-11-12 02:19:00,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 79.67647058823529) internal successors, (2709), 34 states have internal predecessors, (2709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:19:00,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 193.0) internal successors, (6755), 35 states have internal predecessors, (6755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:19:00,090 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 193.0) internal successors, (6755), 35 states have internal predecessors, (6755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:19:00,090 INFO L175 Difference]: Start difference. First operand has 178 places, 304 transitions, 4406 flow. Second operand 34 states and 2709 transitions. [2023-11-12 02:19:00,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 519 transitions, 7951 flow [2023-11-12 02:19:00,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 519 transitions, 7815 flow, removed 14 selfloop flow, removed 3 redundant places. [2023-11-12 02:19:00,278 INFO L231 Difference]: Finished difference. Result has 217 places, 410 transitions, 6975 flow [2023-11-12 02:19:00,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=4295, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=243, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=6975, PETRI_PLACES=217, PETRI_TRANSITIONS=410} [2023-11-12 02:19:00,280 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 188 predicate places. [2023-11-12 02:19:00,280 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 410 transitions, 6975 flow [2023-11-12 02:19:00,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 77.19047619047619) internal successors, (1621), 21 states have internal predecessors, (1621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:19:00,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:19:00,281 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:19:00,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-12 02:19:00,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:19:00,487 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)] === [2023-11-12 02:19:00,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:19:00,487 INFO L85 PathProgramCache]: Analyzing trace with hash 505224770, now seen corresponding path program 13 times [2023-11-12 02:19:00,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:19:00,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917863359] [2023-11-12 02:19:00,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:19:00,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:19:00,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:19:00,693 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:19:00,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:19:00,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917863359] [2023-11-12 02:19:00,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917863359] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:19:00,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787528009] [2023-11-12 02:19:00,694 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 02:19:00,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:19:00,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:19:00,696 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:19:00,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-12 02:19:00,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:19:00,802 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-12 02:19:00,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:19:00,958 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:19:00,958 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:19:01,189 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:19:01,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787528009] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:19:01,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:19:01,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-11-12 02:19:01,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230199846] [2023-11-12 02:19:01,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:19:01,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-12 02:19:01,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:19:01,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-12 02:19:01,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2023-11-12 02:19:01,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 193 [2023-11-12 02:19:01,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 410 transitions, 6975 flow. Second operand has 22 states, 22 states have (on average 76.9090909090909) internal successors, (1692), 22 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:19:01,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:19:01,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 193 [2023-11-12 02:19:01,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:19:02,889 INFO L124 PetriNetUnfolderBase]: 1208/2101 cut-off events. [2023-11-12 02:19:02,890 INFO L125 PetriNetUnfolderBase]: For 34700/34700 co-relation queries the response was YES. [2023-11-12 02:19:02,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17624 conditions, 2101 events. 1208/2101 cut-off events. For 34700/34700 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 11744 event pairs, 15 based on Foata normal form. 54/2155 useless extension candidates. Maximal degree in co-relation 17559. Up to 565 conditions per place. [2023-11-12 02:19:02,930 INFO L140 encePairwiseOnDemand]: 186/193 looper letters, 146 selfloop transitions, 413 changer transitions 15/574 dead transitions. [2023-11-12 02:19:02,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 574 transitions, 10401 flow [2023-11-12 02:19:02,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-12 02:19:02,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-11-12 02:19:02,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2625 transitions. [2023-11-12 02:19:02,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121526142251531 [2023-11-12 02:19:02,937 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2625 transitions. [2023-11-12 02:19:02,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2625 transitions. [2023-11-12 02:19:02,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:19:02,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2625 transitions. [2023-11-12 02:19:02,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 79.54545454545455) internal successors, (2625), 33 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:19:02,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 193.0) internal successors, (6562), 34 states have internal predecessors, (6562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:19:02,957 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 193.0) internal successors, (6562), 34 states have internal predecessors, (6562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:19:02,957 INFO L175 Difference]: Start difference. First operand has 217 places, 410 transitions, 6975 flow. Second operand 33 states and 2625 transitions. [2023-11-12 02:19:02,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 574 transitions, 10401 flow [2023-11-12 02:19:03,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 574 transitions, 9830 flow, removed 258 selfloop flow, removed 9 redundant places. [2023-11-12 02:19:03,359 INFO L231 Difference]: Finished difference. Result has 249 places, 494 transitions, 9206 flow [2023-11-12 02:19:03,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=6640, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=332, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=9206, PETRI_PLACES=249, PETRI_TRANSITIONS=494} [2023-11-12 02:19:03,360 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 220 predicate places. [2023-11-12 02:19:03,360 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 494 transitions, 9206 flow [2023-11-12 02:19:03,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 76.9090909090909) internal successors, (1692), 22 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:19:03,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:19:03,362 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:19:03,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-12 02:19:03,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:19:03,568 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)] === [2023-11-12 02:19:03,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:19:03,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1056727038, now seen corresponding path program 14 times [2023-11-12 02:19:03,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:19:03,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903423726] [2023-11-12 02:19:03,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:19:03,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:19:03,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:19:03,798 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:19:03,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:19:03,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903423726] [2023-11-12 02:19:03,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903423726] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:19:03,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872575560] [2023-11-12 02:19:03,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:19:03,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:19:03,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:19:03,801 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:19:03,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-12 02:19:03,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:19:03,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:19:03,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-12 02:19:03,900 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:19:04,003 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:19:04,003 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:19:04,243 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:19:04,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872575560] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:19:04,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:19:04,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-11-12 02:19:04,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418621701] [2023-11-12 02:19:04,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:19:04,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-12 02:19:04,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:19:04,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-12 02:19:04,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2023-11-12 02:19:04,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 193 [2023-11-12 02:19:04,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 494 transitions, 9206 flow. Second operand has 21 states, 21 states have (on average 76.95238095238095) internal successors, (1616), 21 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:19:04,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:19:04,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 193 [2023-11-12 02:19:04,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:19:06,109 INFO L124 PetriNetUnfolderBase]: 1324/2267 cut-off events. [2023-11-12 02:19:06,109 INFO L125 PetriNetUnfolderBase]: For 49698/49698 co-relation queries the response was YES. [2023-11-12 02:19:06,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21007 conditions, 2267 events. 1324/2267 cut-off events. For 49698/49698 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 12625 event pairs, 42 based on Foata normal form. 32/2299 useless extension candidates. Maximal degree in co-relation 20931. Up to 1081 conditions per place. [2023-11-12 02:19:06,145 INFO L140 encePairwiseOnDemand]: 186/193 looper letters, 181 selfloop transitions, 418 changer transitions 7/606 dead transitions. [2023-11-12 02:19:06,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 606 transitions, 12383 flow [2023-11-12 02:19:06,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-12 02:19:06,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-12 02:19:06,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2140 transitions. [2023-11-12 02:19:06,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4106697370946076 [2023-11-12 02:19:06,150 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2140 transitions. [2023-11-12 02:19:06,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2140 transitions. [2023-11-12 02:19:06,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:19:06,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2140 transitions. [2023-11-12 02:19:06,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 79.25925925925925) internal successors, (2140), 27 states have internal predecessors, (2140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:19:06,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 193.0) internal successors, (5404), 28 states have internal predecessors, (5404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:19:06,165 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 193.0) internal successors, (5404), 28 states have internal predecessors, (5404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:19:06,165 INFO L175 Difference]: Start difference. First operand has 249 places, 494 transitions, 9206 flow. Second operand 27 states and 2140 transitions. [2023-11-12 02:19:06,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 606 transitions, 12383 flow [2023-11-12 02:19:06,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 606 transitions, 11751 flow, removed 110 selfloop flow, removed 13 redundant places. [2023-11-12 02:19:06,547 INFO L231 Difference]: Finished difference. Result has 265 places, 558 transitions, 11069 flow [2023-11-12 02:19:06,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=8617, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=358, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=11069, PETRI_PLACES=265, PETRI_TRANSITIONS=558} [2023-11-12 02:19:06,548 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 236 predicate places. [2023-11-12 02:19:06,549 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 558 transitions, 11069 flow [2023-11-12 02:19:06,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 76.95238095238095) internal successors, (1616), 21 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:19:06,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:19:06,549 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:19:06,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-12 02:19:06,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:19:06,755 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)] === [2023-11-12 02:19:06,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:19:06,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1148500190, now seen corresponding path program 15 times [2023-11-12 02:19:06,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:19:06,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957148621] [2023-11-12 02:19:06,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:19:06,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:19:06,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:19:06,948 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:19:06,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:19:06,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957148621] [2023-11-12 02:19:06,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957148621] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:19:06,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929355395] [2023-11-12 02:19:06,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:19:06,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:19:06,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:19:06,950 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:19:06,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-12 02:19:07,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-12 02:19:07,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:19:07,047 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-12 02:19:07,049 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:19:07,181 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:19:07,181 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:19:07,456 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:19:07,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929355395] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:19:07,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:19:07,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-11-12 02:19:07,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615143145] [2023-11-12 02:19:07,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:19:07,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-12 02:19:07,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:19:07,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-12 02:19:07,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2023-11-12 02:19:07,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 193 [2023-11-12 02:19:07,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 558 transitions, 11069 flow. Second operand has 21 states, 21 states have (on average 77.0952380952381) internal successors, (1619), 21 states have internal predecessors, (1619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:19:07,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:19:07,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 193 [2023-11-12 02:19:07,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:19:09,513 INFO L124 PetriNetUnfolderBase]: 1317/2298 cut-off events. [2023-11-12 02:19:09,513 INFO L125 PetriNetUnfolderBase]: For 59806/59806 co-relation queries the response was YES. [2023-11-12 02:19:09,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21283 conditions, 2298 events. 1317/2298 cut-off events. For 59806/59806 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 13169 event pairs, 11 based on Foata normal form. 48/2346 useless extension candidates. Maximal degree in co-relation 21205. Up to 772 conditions per place. [2023-11-12 02:19:09,554 INFO L140 encePairwiseOnDemand]: 186/193 looper letters, 135 selfloop transitions, 477 changer transitions 3/615 dead transitions. [2023-11-12 02:19:09,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 615 transitions, 12546 flow [2023-11-12 02:19:09,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-12 02:19:09,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-12 02:19:09,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2541 transitions. [2023-11-12 02:19:09,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4114313471502591 [2023-11-12 02:19:09,561 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2541 transitions. [2023-11-12 02:19:09,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2541 transitions. [2023-11-12 02:19:09,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:19:09,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2541 transitions. [2023-11-12 02:19:09,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 79.40625) internal successors, (2541), 32 states have internal predecessors, (2541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:19:09,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 193.0) internal successors, (6369), 33 states have internal predecessors, (6369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:19:09,580 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 193.0) internal successors, (6369), 33 states have internal predecessors, (6369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:19:09,580 INFO L175 Difference]: Start difference. First operand has 265 places, 558 transitions, 11069 flow. Second operand 32 states and 2541 transitions. [2023-11-12 02:19:09,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 615 transitions, 12546 flow [2023-11-12 02:19:09,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 615 transitions, 11907 flow, removed 206 selfloop flow, removed 15 redundant places. [2023-11-12 02:19:10,000 INFO L231 Difference]: Finished difference. Result has 279 places, 558 transitions, 11439 flow [2023-11-12 02:19:10,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=10148, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=467, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=11439, PETRI_PLACES=279, PETRI_TRANSITIONS=558} [2023-11-12 02:19:10,001 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 250 predicate places. [2023-11-12 02:19:10,001 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 558 transitions, 11439 flow [2023-11-12 02:19:10,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 77.0952380952381) internal successors, (1619), 21 states have internal predecessors, (1619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:19:10,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:19:10,002 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:19:10,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-12 02:19:10,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:19:10,209 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)] === [2023-11-12 02:19:10,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:19:10,209 INFO L85 PathProgramCache]: Analyzing trace with hash -2101629000, now seen corresponding path program 16 times [2023-11-12 02:19:10,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:19:10,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062419385] [2023-11-12 02:19:10,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:19:10,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:19:10,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:19:10,442 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:19:10,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:19:10,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062419385] [2023-11-12 02:19:10,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062419385] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:19:10,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031487724] [2023-11-12 02:19:10,443 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 02:19:10,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:19:10,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:19:10,444 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:19:10,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-12 02:19:10,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 02:19:10,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:19:10,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 02:19:10,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:19:10,766 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:19:10,766 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:19:10,907 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:19:10,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031487724] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:19:10,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:19:10,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-11-12 02:19:10,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635692336] [2023-11-12 02:19:10,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:19:10,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-12 02:19:10,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:19:10,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-12 02:19:10,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2023-11-12 02:19:11,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 193 [2023-11-12 02:19:11,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 558 transitions, 11439 flow. Second operand has 20 states, 20 states have (on average 77.05) internal successors, (1541), 20 states have internal predecessors, (1541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:19:11,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:19:11,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 193 [2023-11-12 02:19:11,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:19:13,085 INFO L124 PetriNetUnfolderBase]: 1503/2632 cut-off events. [2023-11-12 02:19:13,085 INFO L125 PetriNetUnfolderBase]: For 45186/45186 co-relation queries the response was YES. [2023-11-12 02:19:13,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24448 conditions, 2632 events. 1503/2632 cut-off events. For 45186/45186 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 15519 event pairs, 23 based on Foata normal form. 10/2642 useless extension candidates. Maximal degree in co-relation 24375. Up to 797 conditions per place. [2023-11-12 02:19:13,126 INFO L140 encePairwiseOnDemand]: 186/193 looper letters, 323 selfloop transitions, 432 changer transitions 0/755 dead transitions. [2023-11-12 02:19:13,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 755 transitions, 16002 flow [2023-11-12 02:19:13,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-12 02:19:13,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-12 02:19:13,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2854 transitions. [2023-11-12 02:19:13,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41076568796776053 [2023-11-12 02:19:13,133 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2854 transitions. [2023-11-12 02:19:13,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2854 transitions. [2023-11-12 02:19:13,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:19:13,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2854 transitions. [2023-11-12 02:19:13,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 79.27777777777777) internal successors, (2854), 36 states have internal predecessors, (2854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:19:13,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 193.0) internal successors, (7141), 37 states have internal predecessors, (7141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:19:13,150 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 193.0) internal successors, (7141), 37 states have internal predecessors, (7141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:19:13,150 INFO L175 Difference]: Start difference. First operand has 279 places, 558 transitions, 11439 flow. Second operand 36 states and 2854 transitions. [2023-11-12 02:19:13,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 755 transitions, 16002 flow [2023-11-12 02:19:13,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 755 transitions, 15400 flow, removed 45 selfloop flow, removed 24 redundant places. [2023-11-12 02:19:13,759 INFO L231 Difference]: Finished difference. Result has 296 places, 667 transitions, 14559 flow [2023-11-12 02:19:13,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=10913, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=328, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=14559, PETRI_PLACES=296, PETRI_TRANSITIONS=667} [2023-11-12 02:19:13,761 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 267 predicate places. [2023-11-12 02:19:13,761 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 667 transitions, 14559 flow [2023-11-12 02:19:13,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 77.05) internal successors, (1541), 20 states have internal predecessors, (1541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:19:13,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:19:13,762 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:19:13,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-12 02:19:13,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-12 02:19:13,969 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)] === [2023-11-12 02:19:13,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:19:13,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1789725424, now seen corresponding path program 17 times [2023-11-12 02:19:13,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:19:13,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729469100] [2023-11-12 02:19:13,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:19:13,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:19:13,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:19:14,186 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:19:14,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:19:14,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729469100] [2023-11-12 02:19:14,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729469100] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:19:14,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239698630] [2023-11-12 02:19:14,188 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-12 02:19:14,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:19:14,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:19:14,189 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:19:14,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-12 02:19:14,287 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-12 02:19:14,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:19:14,289 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-12 02:19:14,291 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:19:14,438 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:19:14,438 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:19:14,647 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:19:14,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239698630] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:19:14,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:19:14,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-11-12 02:19:14,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523143963] [2023-11-12 02:19:14,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:19:14,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-12 02:19:14,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:19:14,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-12 02:19:14,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2023-11-12 02:19:14,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 193 [2023-11-12 02:19:14,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 667 transitions, 14559 flow. Second operand has 23 states, 23 states have (on average 77.0) internal successors, (1771), 23 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:19:14,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:19:14,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 193 [2023-11-12 02:19:14,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:19:17,184 INFO L124 PetriNetUnfolderBase]: 1932/3367 cut-off events. [2023-11-12 02:19:17,184 INFO L125 PetriNetUnfolderBase]: For 60700/60700 co-relation queries the response was YES. [2023-11-12 02:19:17,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32865 conditions, 3367 events. 1932/3367 cut-off events. For 60700/60700 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 20874 event pairs, 15 based on Foata normal form. 36/3403 useless extension candidates. Maximal degree in co-relation 32787. Up to 979 conditions per place. [2023-11-12 02:19:17,243 INFO L140 encePairwiseOnDemand]: 186/193 looper letters, 198 selfloop transitions, 723 changer transitions 12/933 dead transitions. [2023-11-12 02:19:17,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 933 transitions, 21269 flow [2023-11-12 02:19:17,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-12 02:19:17,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-12 02:19:17,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2853 transitions. [2023-11-12 02:19:17,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4106217616580311 [2023-11-12 02:19:17,252 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2853 transitions. [2023-11-12 02:19:17,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2853 transitions. [2023-11-12 02:19:17,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:19:17,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2853 transitions. [2023-11-12 02:19:17,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 79.25) internal successors, (2853), 36 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:19:17,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 193.0) internal successors, (7141), 37 states have internal predecessors, (7141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:19:17,273 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 193.0) internal successors, (7141), 37 states have internal predecessors, (7141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:19:17,273 INFO L175 Difference]: Start difference. First operand has 296 places, 667 transitions, 14559 flow. Second operand 36 states and 2853 transitions. [2023-11-12 02:19:17,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 933 transitions, 21269 flow [2023-11-12 02:19:18,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 933 transitions, 20588 flow, removed 118 selfloop flow, removed 18 redundant places. [2023-11-12 02:19:18,240 INFO L231 Difference]: Finished difference. Result has 324 places, 856 transitions, 20235 flow [2023-11-12 02:19:18,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=13999, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=540, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=20235, PETRI_PLACES=324, PETRI_TRANSITIONS=856} [2023-11-12 02:19:18,242 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 295 predicate places. [2023-11-12 02:19:18,242 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 856 transitions, 20235 flow [2023-11-12 02:19:18,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 77.0) internal successors, (1771), 23 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:19:18,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:19:18,244 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:19:18,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-12 02:19:18,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:19:18,450 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)] === [2023-11-12 02:19:18,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:19:18,451 INFO L85 PathProgramCache]: Analyzing trace with hash -36938928, now seen corresponding path program 18 times [2023-11-12 02:19:18,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:19:18,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108383166] [2023-11-12 02:19:18,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:19:18,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:19:18,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:19:18,732 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:19:18,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:19:18,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108383166] [2023-11-12 02:19:18,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108383166] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:19:18,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087202694] [2023-11-12 02:19:18,734 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-12 02:19:18,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:19:18,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:19:18,737 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:19:18,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-12 02:19:18,868 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-12 02:19:18,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:19:18,870 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-12 02:19:18,872 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:19:19,032 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:19:19,033 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:19:19,313 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:19:19,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087202694] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:19:19,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:19:19,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-11-12 02:19:19,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406533163] [2023-11-12 02:19:19,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:19:19,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-12 02:19:19,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:19:19,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-12 02:19:19,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2023-11-12 02:19:19,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 193 [2023-11-12 02:19:19,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 856 transitions, 20235 flow. Second operand has 23 states, 23 states have (on average 77.04347826086956) internal successors, (1772), 23 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:19:19,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:19:19,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 193 [2023-11-12 02:19:19,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:19:22,813 INFO L124 PetriNetUnfolderBase]: 2106/3681 cut-off events. [2023-11-12 02:19:22,813 INFO L125 PetriNetUnfolderBase]: For 73863/73863 co-relation queries the response was YES. [2023-11-12 02:19:22,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38270 conditions, 3681 events. 2106/3681 cut-off events. For 73863/73863 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 23284 event pairs, 39 based on Foata normal form. 10/3691 useless extension candidates. Maximal degree in co-relation 38185. Up to 1255 conditions per place. [2023-11-12 02:19:22,893 INFO L140 encePairwiseOnDemand]: 186/193 looper letters, 327 selfloop transitions, 689 changer transitions 0/1016 dead transitions. [2023-11-12 02:19:22,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 1016 transitions, 24798 flow [2023-11-12 02:19:22,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-12 02:19:22,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-12 02:19:22,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2933 transitions. [2023-11-12 02:19:22,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41072678896513093 [2023-11-12 02:19:22,902 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2933 transitions. [2023-11-12 02:19:22,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2933 transitions. [2023-11-12 02:19:22,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:19:22,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2933 transitions. [2023-11-12 02:19:22,913 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 79.27027027027027) internal successors, (2933), 37 states have internal predecessors, (2933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:19:22,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 193.0) internal successors, (7334), 38 states have internal predecessors, (7334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:19:22,925 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 193.0) internal successors, (7334), 38 states have internal predecessors, (7334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:19:22,926 INFO L175 Difference]: Start difference. First operand has 324 places, 856 transitions, 20235 flow. Second operand 37 states and 2933 transitions. [2023-11-12 02:19:22,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 1016 transitions, 24798 flow [2023-11-12 02:19:24,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 1016 transitions, 24182 flow, removed 221 selfloop flow, removed 15 redundant places. [2023-11-12 02:19:24,144 INFO L231 Difference]: Finished difference. Result has 351 places, 942 transitions, 23619 flow [2023-11-12 02:19:24,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=19687, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=856, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=605, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=23619, PETRI_PLACES=351, PETRI_TRANSITIONS=942} [2023-11-12 02:19:24,146 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 322 predicate places. [2023-11-12 02:19:24,146 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 942 transitions, 23619 flow [2023-11-12 02:19:24,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 77.04347826086956) internal successors, (1772), 23 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:19:24,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:19:24,146 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:19:24,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-12 02:19:24,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:19:24,347 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)] === [2023-11-12 02:19:24,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:19:24,347 INFO L85 PathProgramCache]: Analyzing trace with hash -899363826, now seen corresponding path program 19 times [2023-11-12 02:19:24,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:19:24,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223006993] [2023-11-12 02:19:24,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:19:24,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:19:24,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:19:24,578 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:19:24,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:19:24,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223006993] [2023-11-12 02:19:24,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223006993] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:19:24,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661157543] [2023-11-12 02:19:24,579 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-12 02:19:24,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:19:24,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:19:24,580 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:19:24,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f44713b8-42e1-4381-8c8d-4bb47c122a2e/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process