./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a0165632 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_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX --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 d2a575889db2e07e0d6a3fd2f8635ba39d2afc2713d706bcd4d4aaa862bed792 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-08 18:15:01,607 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 18:15:01,686 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-08 18:15:01,691 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 18:15:01,691 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 18:15:01,731 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 18:15:01,732 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 18:15:01,734 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 18:15:01,735 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 18:15:01,736 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 18:15:01,737 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 18:15:01,737 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 18:15:01,738 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 18:15:01,740 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 18:15:01,741 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 18:15:01,741 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 18:15:01,742 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 18:15:01,742 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 18:15:01,742 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 18:15:01,743 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 18:15:01,743 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-08 18:15:01,744 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-08 18:15:01,744 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-08 18:15:01,745 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 18:15:01,745 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-08 18:15:01,745 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 18:15:01,746 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-08 18:15:01,746 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 18:15:01,747 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 18:15:01,747 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 18:15:01,747 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 18:15:01,748 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 18:15:01,748 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 18:15:01,749 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 18:15:01,749 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 18:15:01,749 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 18:15:01,750 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 18:15:01,750 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 18:15:01,750 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 18:15:01,751 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 18:15:01,751 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 18:15:01,752 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 18:15:01,752 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_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d2a575889db2e07e0d6a3fd2f8635ba39d2afc2713d706bcd4d4aaa862bed792 [2024-11-08 18:15:02,055 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 18:15:02,091 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 18:15:02,094 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 18:15:02,095 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 18:15:02,096 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 18:15:02,097 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c Unable to find full path for "g++" [2024-11-08 18:15:04,108 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 18:15:04,350 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 18:15:04,351 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2024-11-08 18:15:04,362 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/data/08a67064c/9f4f8c7cdc4944c395d424da7924b14c/FLAGbc0bd3561 [2024-11-08 18:15:04,712 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/data/08a67064c/9f4f8c7cdc4944c395d424da7924b14c [2024-11-08 18:15:04,714 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 18:15:04,716 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 18:15:04,717 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 18:15:04,718 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 18:15:04,726 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 18:15:04,727 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 06:15:04" (1/1) ... [2024-11-08 18:15:04,728 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61f43068 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:15:04, skipping insertion in model container [2024-11-08 18:15:04,728 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 06:15:04" (1/1) ... [2024-11-08 18:15:04,764 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 18:15:05,007 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-08 18:15:05,011 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 18:15:05,024 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 18:15:05,066 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 18:15:05,091 INFO L204 MainTranslator]: Completed translation [2024-11-08 18:15:05,092 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:15:05 WrapperNode [2024-11-08 18:15:05,092 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 18:15:05,094 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 18:15:05,094 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 18:15:05,094 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 18:15:05,104 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:15:05" (1/1) ... [2024-11-08 18:15:05,114 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:15:05" (1/1) ... [2024-11-08 18:15:05,144 INFO L138 Inliner]: procedures = 23, calls = 28, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 138 [2024-11-08 18:15:05,145 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 18:15:05,146 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 18:15:05,146 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 18:15:05,146 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 18:15:05,165 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:15:05" (1/1) ... [2024-11-08 18:15:05,165 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:15:05" (1/1) ... [2024-11-08 18:15:05,169 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:15:05" (1/1) ... [2024-11-08 18:15:05,186 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-08 18:15:05,187 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:15:05" (1/1) ... [2024-11-08 18:15:05,187 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:15:05" (1/1) ... [2024-11-08 18:15:05,196 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:15:05" (1/1) ... [2024-11-08 18:15:05,201 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:15:05" (1/1) ... [2024-11-08 18:15:05,203 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:15:05" (1/1) ... [2024-11-08 18:15:05,205 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:15:05" (1/1) ... [2024-11-08 18:15:05,208 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 18:15:05,209 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 18:15:05,210 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 18:15:05,210 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 18:15:05,211 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:15:05" (1/1) ... [2024-11-08 18:15:05,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 18:15:05,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:15:05,257 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 18:15:05,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 18:15:05,303 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 18:15:05,304 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-08 18:15:05,304 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-08 18:15:05,304 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-08 18:15:05,304 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-08 18:15:05,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 18:15:05,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-08 18:15:05,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 18:15:05,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-08 18:15:05,305 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-08 18:15:05,305 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-08 18:15:05,306 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-08 18:15:05,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 18:15:05,306 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 18:15:05,306 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 18:15:05,306 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-08 18:15:05,310 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-08 18:15:05,486 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 18:15:05,489 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 18:15:05,923 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-08 18:15:05,923 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 18:15:06,249 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 18:15:06,250 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-08 18:15:06,250 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 06:15:06 BoogieIcfgContainer [2024-11-08 18:15:06,250 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 18:15:06,253 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 18:15:06,253 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 18:15:06,256 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 18:15:06,257 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 06:15:04" (1/3) ... [2024-11-08 18:15:06,258 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d7eda69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 06:15:06, skipping insertion in model container [2024-11-08 18:15:06,258 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:15:05" (2/3) ... [2024-11-08 18:15:06,258 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d7eda69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 06:15:06, skipping insertion in model container [2024-11-08 18:15:06,259 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 06:15:06" (3/3) ... [2024-11-08 18:15:06,260 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive-alt.wvr.c [2024-11-08 18:15:06,274 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 18:15:06,274 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2024-11-08 18:15:06,274 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-08 18:15:06,398 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-08 18:15:06,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 46 places, 46 transitions, 106 flow [2024-11-08 18:15:06,487 INFO L124 PetriNetUnfolderBase]: 7/44 cut-off events. [2024-11-08 18:15:06,488 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-08 18:15:06,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 44 events. 7/44 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 76 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 29. Up to 2 conditions per place. [2024-11-08 18:15:06,492 INFO L82 GeneralOperation]: Start removeDead. Operand has 46 places, 46 transitions, 106 flow [2024-11-08 18:15:06,496 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 43 transitions, 98 flow [2024-11-08 18:15:06,512 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 18:15:06,521 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, 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;@6943822c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 18:15:06,521 INFO L334 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2024-11-08 18:15:06,526 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-08 18:15:06,527 INFO L124 PetriNetUnfolderBase]: 2/8 cut-off events. [2024-11-08 18:15:06,527 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-08 18:15:06,527 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:15:06,530 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-08 18:15:06,530 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-08 18:15:06,536 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:15:06,537 INFO L85 PathProgramCache]: Analyzing trace with hash 14098170, now seen corresponding path program 1 times [2024-11-08 18:15:06,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:15:06,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117607511] [2024-11-08 18:15:06,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:15:06,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:15:06,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:15:06,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:15:06,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:15:06,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117607511] [2024-11-08 18:15:06,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117607511] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:15:06,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:15:06,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-08 18:15:06,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334345298] [2024-11-08 18:15:06,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:15:06,898 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 18:15:06,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:15:06,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 18:15:06,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 18:15:06,940 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 46 [2024-11-08 18:15:06,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 43 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:15:06,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:15:06,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 46 [2024-11-08 18:15:06,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:15:07,164 INFO L124 PetriNetUnfolderBase]: 309/553 cut-off events. [2024-11-08 18:15:07,165 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2024-11-08 18:15:07,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1086 conditions, 553 events. 309/553 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2420 event pairs, 250 based on Foata normal form. 1/380 useless extension candidates. Maximal degree in co-relation 1005. Up to 497 conditions per place. [2024-11-08 18:15:07,173 INFO L140 encePairwiseOnDemand]: 40/46 looper letters, 27 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2024-11-08 18:15:07,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 38 transitions, 146 flow [2024-11-08 18:15:07,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 18:15:07,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 18:15:07,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 69 transitions. [2024-11-08 18:15:07,186 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-08 18:15:07,188 INFO L175 Difference]: Start difference. First operand has 43 places, 43 transitions, 98 flow. Second operand 3 states and 69 transitions. [2024-11-08 18:15:07,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 38 transitions, 146 flow [2024-11-08 18:15:07,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 38 transitions, 138 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-08 18:15:07,194 INFO L231 Difference]: Finished difference. Result has 38 places, 38 transitions, 84 flow [2024-11-08 18:15:07,196 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=38, PETRI_TRANSITIONS=38} [2024-11-08 18:15:07,201 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, -5 predicate places. [2024-11-08 18:15:07,201 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 38 transitions, 84 flow [2024-11-08 18:15:07,202 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:15:07,202 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:15:07,203 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-08 18:15:07,203 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 18:15:07,203 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-08 18:15:07,204 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:15:07,205 INFO L85 PathProgramCache]: Analyzing trace with hash 14098171, now seen corresponding path program 1 times [2024-11-08 18:15:07,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:15:07,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94378111] [2024-11-08 18:15:07,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:15:07,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:15:07,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:15:07,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:15:07,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:15:07,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94378111] [2024-11-08 18:15:07,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94378111] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:15:07,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:15:07,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 18:15:07,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648659297] [2024-11-08 18:15:07,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:15:07,671 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 18:15:07,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:15:07,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 18:15:07,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 18:15:07,730 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 46 [2024-11-08 18:15:07,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 38 transitions, 84 flow. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:15:07,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:15:07,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 46 [2024-11-08 18:15:07,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:15:08,028 INFO L124 PetriNetUnfolderBase]: 311/560 cut-off events. [2024-11-08 18:15:08,029 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-11-08 18:15:08,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1086 conditions, 560 events. 311/560 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2456 event pairs, 250 based on Foata normal form. 0/382 useless extension candidates. Maximal degree in co-relation 1049. Up to 506 conditions per place. [2024-11-08 18:15:08,038 INFO L140 encePairwiseOnDemand]: 41/46 looper letters, 35 selfloop transitions, 5 changer transitions 0/45 dead transitions. [2024-11-08 18:15:08,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 45 transitions, 182 flow [2024-11-08 18:15:08,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 18:15:08,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 18:15:08,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 77 transitions. [2024-11-08 18:15:08,042 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41847826086956524 [2024-11-08 18:15:08,043 INFO L175 Difference]: Start difference. First operand has 38 places, 38 transitions, 84 flow. Second operand 4 states and 77 transitions. [2024-11-08 18:15:08,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 45 transitions, 182 flow [2024-11-08 18:15:08,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 45 transitions, 174 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 18:15:08,047 INFO L231 Difference]: Finished difference. Result has 41 places, 42 transitions, 112 flow [2024-11-08 18:15:08,047 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=112, PETRI_PLACES=41, PETRI_TRANSITIONS=42} [2024-11-08 18:15:08,048 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, -2 predicate places. [2024-11-08 18:15:08,048 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 42 transitions, 112 flow [2024-11-08 18:15:08,049 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:15:08,049 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:15:08,049 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-08 18:15:08,049 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 18:15:08,050 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-08 18:15:08,051 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:15:08,051 INFO L85 PathProgramCache]: Analyzing trace with hash -907728854, now seen corresponding path program 1 times [2024-11-08 18:15:08,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:15:08,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377279456] [2024-11-08 18:15:08,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:15:08,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:15:08,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:15:08,565 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:15:08,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:15:08,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377279456] [2024-11-08 18:15:08,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377279456] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:15:08,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472132645] [2024-11-08 18:15:08,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:15:08,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:15:08,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:15:08,576 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:15:08,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 18:15:08,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:15:08,663 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-08 18:15:08,668 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:15:08,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-08 18:15:08,968 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:15:08,968 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:15:09,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:15:09,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472132645] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:15:09,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:15:09,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2024-11-08 18:15:09,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805996338] [2024-11-08 18:15:09,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:15:09,134 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-08 18:15:09,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:15:09,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-08 18:15:09,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-11-08 18:15:09,207 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 46 [2024-11-08 18:15:09,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 42 transitions, 112 flow. Second operand has 12 states, 12 states have (on average 10.75) internal successors, (129), 12 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:15:09,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:15:09,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 46 [2024-11-08 18:15:09,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:15:09,669 INFO L124 PetriNetUnfolderBase]: 313/567 cut-off events. [2024-11-08 18:15:09,669 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-11-08 18:15:09,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1115 conditions, 567 events. 313/567 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2484 event pairs, 250 based on Foata normal form. 0/391 useless extension candidates. Maximal degree in co-relation 1058. Up to 502 conditions per place. [2024-11-08 18:15:09,678 INFO L140 encePairwiseOnDemand]: 41/46 looper letters, 34 selfloop transitions, 13 changer transitions 0/52 dead transitions. [2024-11-08 18:15:09,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 52 transitions, 234 flow [2024-11-08 18:15:09,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-08 18:15:09,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-08 18:15:09,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-11-08 18:15:09,682 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.328804347826087 [2024-11-08 18:15:09,682 INFO L175 Difference]: Start difference. First operand has 41 places, 42 transitions, 112 flow. Second operand 8 states and 121 transitions. [2024-11-08 18:15:09,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 52 transitions, 234 flow [2024-11-08 18:15:09,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 52 transitions, 234 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-08 18:15:09,684 INFO L231 Difference]: Finished difference. Result has 47 places, 46 transitions, 154 flow [2024-11-08 18:15:09,684 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=154, PETRI_PLACES=47, PETRI_TRANSITIONS=46} [2024-11-08 18:15:09,687 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 4 predicate places. [2024-11-08 18:15:09,687 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 46 transitions, 154 flow [2024-11-08 18:15:09,687 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.75) internal successors, (129), 12 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:15:09,688 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:15:09,688 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:15:09,710 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-08 18:15:09,889 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:15:09,889 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-08 18:15:09,890 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:15:09,890 INFO L85 PathProgramCache]: Analyzing trace with hash 411740856, now seen corresponding path program 1 times [2024-11-08 18:15:09,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:15:09,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189482677] [2024-11-08 18:15:09,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:15:09,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:15:09,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:15:09,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:15:09,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:15:09,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189482677] [2024-11-08 18:15:09,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189482677] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:15:09,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:15:09,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-08 18:15:09,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53416929] [2024-11-08 18:15:09,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:15:09,953 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 18:15:09,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:15:09,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 18:15:09,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 18:15:09,954 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 46 [2024-11-08 18:15:09,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 46 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:15:09,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:15:09,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 46 [2024-11-08 18:15:09,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:15:10,144 INFO L124 PetriNetUnfolderBase]: 408/757 cut-off events. [2024-11-08 18:15:10,144 INFO L125 PetriNetUnfolderBase]: For 38/38 co-relation queries the response was YES. [2024-11-08 18:15:10,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1491 conditions, 757 events. 408/757 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3498 event pairs, 186 based on Foata normal form. 22/542 useless extension candidates. Maximal degree in co-relation 1430. Up to 420 conditions per place. [2024-11-08 18:15:10,149 INFO L140 encePairwiseOnDemand]: 40/46 looper letters, 51 selfloop transitions, 3 changer transitions 0/64 dead transitions. [2024-11-08 18:15:10,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 64 transitions, 300 flow [2024-11-08 18:15:10,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 18:15:10,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 18:15:10,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 89 transitions. [2024-11-08 18:15:10,152 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.644927536231884 [2024-11-08 18:15:10,153 INFO L175 Difference]: Start difference. First operand has 47 places, 46 transitions, 154 flow. Second operand 3 states and 89 transitions. [2024-11-08 18:15:10,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 64 transitions, 300 flow [2024-11-08 18:15:10,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 64 transitions, 261 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-11-08 18:15:10,157 INFO L231 Difference]: Finished difference. Result has 44 places, 48 transitions, 138 flow [2024-11-08 18:15:10,157 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=44, PETRI_TRANSITIONS=48} [2024-11-08 18:15:10,158 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 1 predicate places. [2024-11-08 18:15:10,160 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 48 transitions, 138 flow [2024-11-08 18:15:10,160 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:15:10,160 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:15:10,160 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:15:10,160 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-08 18:15:10,161 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-08 18:15:10,161 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:15:10,161 INFO L85 PathProgramCache]: Analyzing trace with hash 265451022, now seen corresponding path program 1 times [2024-11-08 18:15:10,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:15:10,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482306567] [2024-11-08 18:15:10,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:15:10,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:15:10,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:15:10,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:15:10,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:15:10,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482306567] [2024-11-08 18:15:10,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482306567] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:15:10,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:15:10,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 18:15:10,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537523610] [2024-11-08 18:15:10,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:15:10,274 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 18:15:10,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:15:10,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 18:15:10,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 18:15:10,289 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-11-08 18:15:10,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 48 transitions, 138 flow. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:15:10,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:15:10,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-11-08 18:15:10,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:15:10,482 INFO L124 PetriNetUnfolderBase]: 475/891 cut-off events. [2024-11-08 18:15:10,482 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2024-11-08 18:15:10,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1880 conditions, 891 events. 475/891 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 4206 event pairs, 407 based on Foata normal form. 0/695 useless extension candidates. Maximal degree in co-relation 871. Up to 693 conditions per place. [2024-11-08 18:15:10,489 INFO L140 encePairwiseOnDemand]: 40/46 looper letters, 51 selfloop transitions, 6 changer transitions 1/66 dead transitions. [2024-11-08 18:15:10,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 66 transitions, 294 flow [2024-11-08 18:15:10,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 18:15:10,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 18:15:10,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 107 transitions. [2024-11-08 18:15:10,491 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4652173913043478 [2024-11-08 18:15:10,491 INFO L175 Difference]: Start difference. First operand has 44 places, 48 transitions, 138 flow. Second operand 5 states and 107 transitions. [2024-11-08 18:15:10,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 66 transitions, 294 flow [2024-11-08 18:15:10,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 66 transitions, 291 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 18:15:10,494 INFO L231 Difference]: Finished difference. Result has 49 places, 50 transitions, 163 flow [2024-11-08 18:15:10,494 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=163, PETRI_PLACES=49, PETRI_TRANSITIONS=50} [2024-11-08 18:15:10,495 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 6 predicate places. [2024-11-08 18:15:10,495 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 50 transitions, 163 flow [2024-11-08 18:15:10,495 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:15:10,496 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:15:10,496 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:15:10,496 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-08 18:15:10,496 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-08 18:15:10,497 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:15:10,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1745909249, now seen corresponding path program 1 times [2024-11-08 18:15:10,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:15:10,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026855166] [2024-11-08 18:15:10,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:15:10,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:15:10,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:15:10,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:15:10,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:15:10,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026855166] [2024-11-08 18:15:10,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026855166] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:15:10,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:15:10,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 18:15:10,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253795154] [2024-11-08 18:15:10,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:15:10,761 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-08 18:15:10,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:15:10,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-08 18:15:10,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-08 18:15:10,808 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-11-08 18:15:10,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 50 transitions, 163 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:15:10,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:15:10,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-11-08 18:15:10,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:15:11,094 INFO L124 PetriNetUnfolderBase]: 374/733 cut-off events. [2024-11-08 18:15:11,094 INFO L125 PetriNetUnfolderBase]: For 91/91 co-relation queries the response was YES. [2024-11-08 18:15:11,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1540 conditions, 733 events. 374/733 cut-off events. For 91/91 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 3265 event pairs, 212 based on Foata normal form. 0/649 useless extension candidates. Maximal degree in co-relation 1228. Up to 463 conditions per place. [2024-11-08 18:15:11,100 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 35 selfloop transitions, 12 changer transitions 0/55 dead transitions. [2024-11-08 18:15:11,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 55 transitions, 270 flow [2024-11-08 18:15:11,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 18:15:11,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 18:15:11,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 95 transitions. [2024-11-08 18:15:11,102 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41304347826086957 [2024-11-08 18:15:11,102 INFO L175 Difference]: Start difference. First operand has 49 places, 50 transitions, 163 flow. Second operand 5 states and 95 transitions. [2024-11-08 18:15:11,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 55 transitions, 270 flow [2024-11-08 18:15:11,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 55 transitions, 268 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 18:15:11,105 INFO L231 Difference]: Finished difference. Result has 49 places, 47 transitions, 177 flow [2024-11-08 18:15:11,106 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=177, PETRI_PLACES=49, PETRI_TRANSITIONS=47} [2024-11-08 18:15:11,106 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 6 predicate places. [2024-11-08 18:15:11,107 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 47 transitions, 177 flow [2024-11-08 18:15:11,107 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:15:11,107 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:15:11,107 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:15:11,107 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-08 18:15:11,108 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-08 18:15:11,108 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:15:11,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1745909250, now seen corresponding path program 1 times [2024-11-08 18:15:11,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:15:11,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579289850] [2024-11-08 18:15:11,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:15:11,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:15:11,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:15:11,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:15:11,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:15:11,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579289850] [2024-11-08 18:15:11,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579289850] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:15:11,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:15:11,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 18:15:11,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231805408] [2024-11-08 18:15:11,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:15:11,168 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 18:15:11,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:15:11,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 18:15:11,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 18:15:11,177 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 46 [2024-11-08 18:15:11,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 177 flow. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:15:11,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:15:11,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 46 [2024-11-08 18:15:11,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:15:11,304 INFO L124 PetriNetUnfolderBase]: 285/574 cut-off events. [2024-11-08 18:15:11,304 INFO L125 PetriNetUnfolderBase]: For 211/211 co-relation queries the response was YES. [2024-11-08 18:15:11,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1278 conditions, 574 events. 285/574 cut-off events. For 211/211 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2405 event pairs, 233 based on Foata normal form. 48/564 useless extension candidates. Maximal degree in co-relation 935. Up to 498 conditions per place. [2024-11-08 18:15:11,309 INFO L140 encePairwiseOnDemand]: 41/46 looper letters, 25 selfloop transitions, 7 changer transitions 0/44 dead transitions. [2024-11-08 18:15:11,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 44 transitions, 233 flow [2024-11-08 18:15:11,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 18:15:11,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 18:15:11,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 74 transitions. [2024-11-08 18:15:11,310 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40217391304347827 [2024-11-08 18:15:11,311 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 177 flow. Second operand 4 states and 74 transitions. [2024-11-08 18:15:11,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 44 transitions, 233 flow [2024-11-08 18:15:11,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 44 transitions, 209 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-08 18:15:11,314 INFO L231 Difference]: Finished difference. Result has 45 places, 44 transitions, 159 flow [2024-11-08 18:15:11,314 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=159, PETRI_PLACES=45, PETRI_TRANSITIONS=44} [2024-11-08 18:15:11,316 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 2 predicate places. [2024-11-08 18:15:11,317 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 44 transitions, 159 flow [2024-11-08 18:15:11,317 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:15:11,317 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:15:11,319 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:15:11,319 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-08 18:15:11,320 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-08 18:15:11,320 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:15:11,320 INFO L85 PathProgramCache]: Analyzing trace with hash 2002823141, now seen corresponding path program 1 times [2024-11-08 18:15:11,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:15:11,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530443531] [2024-11-08 18:15:11,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:15:11,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:15:11,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:15:11,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:15:11,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:15:11,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530443531] [2024-11-08 18:15:11,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530443531] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:15:11,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:15:11,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 18:15:11,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807724865] [2024-11-08 18:15:11,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:15:11,377 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 18:15:11,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:15:11,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 18:15:11,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 18:15:11,379 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 46 [2024-11-08 18:15:11,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 44 transitions, 159 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:15:11,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:15:11,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 46 [2024-11-08 18:15:11,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:15:11,520 INFO L124 PetriNetUnfolderBase]: 359/690 cut-off events. [2024-11-08 18:15:11,520 INFO L125 PetriNetUnfolderBase]: For 119/119 co-relation queries the response was YES. [2024-11-08 18:15:11,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1477 conditions, 690 events. 359/690 cut-off events. For 119/119 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2834 event pairs, 220 based on Foata normal form. 3/625 useless extension candidates. Maximal degree in co-relation 1137. Up to 465 conditions per place. [2024-11-08 18:15:11,525 INFO L140 encePairwiseOnDemand]: 43/46 looper letters, 38 selfloop transitions, 2 changer transitions 8/58 dead transitions. [2024-11-08 18:15:11,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 58 transitions, 289 flow [2024-11-08 18:15:11,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 18:15:11,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 18:15:11,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2024-11-08 18:15:11,526 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5579710144927537 [2024-11-08 18:15:11,526 INFO L175 Difference]: Start difference. First operand has 45 places, 44 transitions, 159 flow. Second operand 3 states and 77 transitions. [2024-11-08 18:15:11,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 58 transitions, 289 flow [2024-11-08 18:15:11,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 58 transitions, 281 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 18:15:11,529 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 141 flow [2024-11-08 18:15:11,529 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=141, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2024-11-08 18:15:11,530 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-11-08 18:15:11,530 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 141 flow [2024-11-08 18:15:11,530 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:15:11,530 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:15:11,530 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:15:11,530 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-08 18:15:11,531 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-08 18:15:11,531 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:15:11,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1233442563, now seen corresponding path program 1 times [2024-11-08 18:15:11,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:15:11,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397524204] [2024-11-08 18:15:11,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:15:11,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:15:11,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:15:12,159 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:15:12,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:15:12,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397524204] [2024-11-08 18:15:12,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397524204] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:15:12,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397238515] [2024-11-08 18:15:12,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:15:12,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:15:12,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:15:12,162 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:15:12,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 18:15:12,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:15:12,266 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-08 18:15:12,269 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:15:12,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-08 18:15:12,836 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:15:12,836 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:15:13,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 55 [2024-11-08 18:15:13,801 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 18:15:13,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 68 [2024-11-08 18:15:14,019 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:15:14,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397238515] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:15:14,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:15:14,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 20 [2024-11-08 18:15:14,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343650687] [2024-11-08 18:15:14,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:15:14,020 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-08 18:15:14,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:15:14,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-08 18:15:14,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2024-11-08 18:15:14,191 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-11-08 18:15:14,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 141 flow. Second operand has 21 states, 21 states have (on average 13.428571428571429) internal successors, (282), 21 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:15:14,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:15:14,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-11-08 18:15:14,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:15:16,437 INFO L124 PetriNetUnfolderBase]: 1391/2631 cut-off events. [2024-11-08 18:15:16,438 INFO L125 PetriNetUnfolderBase]: For 668/668 co-relation queries the response was YES. [2024-11-08 18:15:16,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5745 conditions, 2631 events. 1391/2631 cut-off events. For 668/668 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 15520 event pairs, 422 based on Foata normal form. 19/2364 useless extension candidates. Maximal degree in co-relation 3345. Up to 522 conditions per place. [2024-11-08 18:15:16,451 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 141 selfloop transitions, 39 changer transitions 43/228 dead transitions. [2024-11-08 18:15:16,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 228 transitions, 1111 flow [2024-11-08 18:15:16,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-08 18:15:16,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-08 18:15:16,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 434 transitions. [2024-11-08 18:15:16,455 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4492753623188406 [2024-11-08 18:15:16,455 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 141 flow. Second operand 21 states and 434 transitions. [2024-11-08 18:15:16,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 228 transitions, 1111 flow [2024-11-08 18:15:16,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 228 transitions, 1080 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-11-08 18:15:16,462 INFO L231 Difference]: Finished difference. Result has 73 places, 75 transitions, 463 flow [2024-11-08 18:15:16,462 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=463, PETRI_PLACES=73, PETRI_TRANSITIONS=75} [2024-11-08 18:15:16,463 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 30 predicate places. [2024-11-08 18:15:16,463 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 75 transitions, 463 flow [2024-11-08 18:15:16,464 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 13.428571428571429) internal successors, (282), 21 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:15:16,464 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:15:16,464 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:15:16,484 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-08 18:15:16,665 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:15:16,665 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-08 18:15:16,666 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:15:16,666 INFO L85 PathProgramCache]: Analyzing trace with hash -152325083, now seen corresponding path program 1 times [2024-11-08 18:15:16,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:15:16,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522077870] [2024-11-08 18:15:16,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:15:16,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:15:16,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:15:16,793 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 18:15:16,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:15:16,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522077870] [2024-11-08 18:15:16,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522077870] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:15:16,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:15:16,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 18:15:16,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705877485] [2024-11-08 18:15:16,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:15:16,795 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 18:15:16,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:15:16,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 18:15:16,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 18:15:16,802 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-11-08 18:15:16,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 75 transitions, 463 flow. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:15:16,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:15:16,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-11-08 18:15:16,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:15:17,252 INFO L124 PetriNetUnfolderBase]: 1501/2655 cut-off events. [2024-11-08 18:15:17,252 INFO L125 PetriNetUnfolderBase]: For 3132/3132 co-relation queries the response was YES. [2024-11-08 18:15:17,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6938 conditions, 2655 events. 1501/2655 cut-off events. For 3132/3132 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 14653 event pairs, 866 based on Foata normal form. 33/2504 useless extension candidates. Maximal degree in co-relation 6425. Up to 1995 conditions per place. [2024-11-08 18:15:17,266 INFO L140 encePairwiseOnDemand]: 43/46 looper letters, 69 selfloop transitions, 2 changer transitions 3/84 dead transitions. [2024-11-08 18:15:17,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 84 transitions, 630 flow [2024-11-08 18:15:17,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 18:15:17,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 18:15:17,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 73 transitions. [2024-11-08 18:15:17,267 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5289855072463768 [2024-11-08 18:15:17,268 INFO L175 Difference]: Start difference. First operand has 73 places, 75 transitions, 463 flow. Second operand 3 states and 73 transitions. [2024-11-08 18:15:17,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 84 transitions, 630 flow [2024-11-08 18:15:17,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 84 transitions, 573 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-11-08 18:15:17,293 INFO L231 Difference]: Finished difference. Result has 70 places, 65 transitions, 344 flow [2024-11-08 18:15:17,294 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=344, PETRI_PLACES=70, PETRI_TRANSITIONS=65} [2024-11-08 18:15:17,294 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 27 predicate places. [2024-11-08 18:15:17,295 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 65 transitions, 344 flow [2024-11-08 18:15:17,295 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:15:17,298 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:15:17,298 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:15:17,299 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-08 18:15:17,299 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-08 18:15:17,299 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:15:17,299 INFO L85 PathProgramCache]: Analyzing trace with hash 93077266, now seen corresponding path program 2 times [2024-11-08 18:15:17,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:15:17,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364011398] [2024-11-08 18:15:17,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:15:17,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:15:17,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:15:18,182 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:15:18,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:15:18,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364011398] [2024-11-08 18:15:18,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364011398] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:15:18,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701123935] [2024-11-08 18:15:18,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 18:15:18,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:15:18,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:15:18,186 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:15:18,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 18:15:18,277 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 18:15:18,278 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:15:18,279 INFO L255 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-08 18:15:18,281 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:15:18,446 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 18:15:18,447 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:15:18,555 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 18:15:18,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2024-11-08 18:15:18,710 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-08 18:15:18,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701123935] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:15:18,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:15:18,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 4] total 15 [2024-11-08 18:15:18,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108303670] [2024-11-08 18:15:18,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:15:18,712 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-08 18:15:18,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:15:18,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-08 18:15:18,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2024-11-08 18:15:18,785 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-11-08 18:15:18,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 65 transitions, 344 flow. Second operand has 16 states, 16 states have (on average 14.625) internal successors, (234), 16 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:15:18,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:15:18,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-11-08 18:15:18,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:15:19,929 INFO L124 PetriNetUnfolderBase]: 1758/3302 cut-off events. [2024-11-08 18:15:19,930 INFO L125 PetriNetUnfolderBase]: For 3612/3612 co-relation queries the response was YES. [2024-11-08 18:15:19,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8648 conditions, 3302 events. 1758/3302 cut-off events. For 3612/3612 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 20463 event pairs, 482 based on Foata normal form. 1/3081 useless extension candidates. Maximal degree in co-relation 7670. Up to 696 conditions per place. [2024-11-08 18:15:19,950 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 95 selfloop transitions, 28 changer transitions 19/148 dead transitions. [2024-11-08 18:15:19,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 148 transitions, 947 flow [2024-11-08 18:15:19,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-08 18:15:19,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-08 18:15:19,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 232 transitions. [2024-11-08 18:15:19,952 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42028985507246375 [2024-11-08 18:15:19,952 INFO L175 Difference]: Start difference. First operand has 70 places, 65 transitions, 344 flow. Second operand 12 states and 232 transitions. [2024-11-08 18:15:19,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 148 transitions, 947 flow [2024-11-08 18:15:19,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 148 transitions, 944 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 18:15:19,975 INFO L231 Difference]: Finished difference. Result has 82 places, 76 transitions, 496 flow [2024-11-08 18:15:19,976 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=496, PETRI_PLACES=82, PETRI_TRANSITIONS=76} [2024-11-08 18:15:19,976 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-11-08 18:15:19,976 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 76 transitions, 496 flow [2024-11-08 18:15:19,977 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 14.625) internal successors, (234), 16 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:15:19,977 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:15:19,977 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:15:20,000 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-08 18:15:20,177 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-08 18:15:20,178 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-08 18:15:20,178 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:15:20,179 INFO L85 PathProgramCache]: Analyzing trace with hash -867727645, now seen corresponding path program 3 times [2024-11-08 18:15:20,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:15:20,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958298114] [2024-11-08 18:15:20,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:15:20,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:15:20,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:15:20,294 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-08 18:15:20,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:15:20,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958298114] [2024-11-08 18:15:20,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958298114] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:15:20,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833104298] [2024-11-08 18:15:20,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 18:15:20,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:15:20,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:15:20,297 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:15:20,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 18:15:20,394 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-08 18:15:20,394 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:15:20,395 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 18:15:20,397 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:15:20,520 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-08 18:15:20,520 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:15:20,664 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-08 18:15:20,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833104298] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:15:20,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:15:20,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 11 [2024-11-08 18:15:20,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880356239] [2024-11-08 18:15:20,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:15:20,665 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-08 18:15:20,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:15:20,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-08 18:15:20,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2024-11-08 18:15:20,692 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-11-08 18:15:20,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 76 transitions, 496 flow. Second operand has 12 states, 12 states have (on average 15.166666666666666) internal successors, (182), 12 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:15:20,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:15:20,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-11-08 18:15:20,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:15:21,572 INFO L124 PetriNetUnfolderBase]: 2049/4032 cut-off events. [2024-11-08 18:15:21,572 INFO L125 PetriNetUnfolderBase]: For 6359/6359 co-relation queries the response was YES. [2024-11-08 18:15:21,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10531 conditions, 4032 events. 2049/4032 cut-off events. For 6359/6359 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 25959 event pairs, 620 based on Foata normal form. 104/3872 useless extension candidates. Maximal degree in co-relation 10484. Up to 678 conditions per place. [2024-11-08 18:15:21,586 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 56 selfloop transitions, 17 changer transitions 95/174 dead transitions. [2024-11-08 18:15:21,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 174 transitions, 1157 flow [2024-11-08 18:15:21,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-08 18:15:21,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-08 18:15:21,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 298 transitions. [2024-11-08 18:15:21,590 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4318840579710145 [2024-11-08 18:15:21,590 INFO L175 Difference]: Start difference. First operand has 82 places, 76 transitions, 496 flow. Second operand 15 states and 298 transitions. [2024-11-08 18:15:21,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 174 transitions, 1157 flow [2024-11-08 18:15:21,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 174 transitions, 1077 flow, removed 25 selfloop flow, removed 9 redundant places. [2024-11-08 18:15:21,642 INFO L231 Difference]: Finished difference. Result has 90 places, 53 transitions, 377 flow [2024-11-08 18:15:21,642 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=377, PETRI_PLACES=90, PETRI_TRANSITIONS=53} [2024-11-08 18:15:21,642 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 47 predicate places. [2024-11-08 18:15:21,642 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 53 transitions, 377 flow [2024-11-08 18:15:21,643 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 15.166666666666666) internal successors, (182), 12 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:15:21,643 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:15:21,643 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:15:21,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-08 18:15:21,843 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-08 18:15:21,844 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-08 18:15:21,844 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:15:21,844 INFO L85 PathProgramCache]: Analyzing trace with hash 730518283, now seen corresponding path program 4 times [2024-11-08 18:15:21,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:15:21,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434164403] [2024-11-08 18:15:21,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:15:21,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:15:21,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:15:22,025 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-08 18:15:22,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:15:22,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434164403] [2024-11-08 18:15:22,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434164403] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:15:22,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:15:22,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 18:15:22,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472335692] [2024-11-08 18:15:22,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:15:22,027 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 18:15:22,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:15:22,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 18:15:22,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 18:15:22,037 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-11-08 18:15:22,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 53 transitions, 377 flow. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:15:22,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:15:22,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-11-08 18:15:22,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:15:22,673 INFO L124 PetriNetUnfolderBase]: 1965/3419 cut-off events. [2024-11-08 18:15:22,674 INFO L125 PetriNetUnfolderBase]: For 8261/8261 co-relation queries the response was YES. [2024-11-08 18:15:22,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10409 conditions, 3419 events. 1965/3419 cut-off events. For 8261/8261 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 17317 event pairs, 305 based on Foata normal form. 176/3339 useless extension candidates. Maximal degree in co-relation 10344. Up to 1673 conditions per place. [2024-11-08 18:15:22,698 INFO L140 encePairwiseOnDemand]: 42/46 looper letters, 65 selfloop transitions, 4 changer transitions 3/79 dead transitions. [2024-11-08 18:15:22,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 79 transitions, 685 flow [2024-11-08 18:15:22,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 18:15:22,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 18:15:22,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 88 transitions. [2024-11-08 18:15:22,699 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4782608695652174 [2024-11-08 18:15:22,699 INFO L175 Difference]: Start difference. First operand has 90 places, 53 transitions, 377 flow. Second operand 4 states and 88 transitions. [2024-11-08 18:15:22,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 79 transitions, 685 flow [2024-11-08 18:15:22,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 79 transitions, 600 flow, removed 32 selfloop flow, removed 14 redundant places. [2024-11-08 18:15:22,716 INFO L231 Difference]: Finished difference. Result has 63 places, 53 transitions, 336 flow [2024-11-08 18:15:22,716 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=336, PETRI_PLACES=63, PETRI_TRANSITIONS=53} [2024-11-08 18:15:22,717 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 20 predicate places. [2024-11-08 18:15:22,717 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 53 transitions, 336 flow [2024-11-08 18:15:22,717 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:15:22,718 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:15:22,718 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:15:22,718 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-08 18:15:22,718 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-08 18:15:22,719 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:15:22,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1083516659, now seen corresponding path program 1 times [2024-11-08 18:15:22,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:15:22,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330276375] [2024-11-08 18:15:22,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:15:22,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:15:22,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:15:24,172 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:15:24,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:15:24,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330276375] [2024-11-08 18:15:24,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330276375] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:15:24,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871143802] [2024-11-08 18:15:24,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:15:24,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:15:24,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:15:24,176 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:15:24,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 18:15:24,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:15:24,281 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-08 18:15:24,284 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:15:24,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-08 18:15:24,909 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:15:24,910 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:15:26,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 105 [2024-11-08 18:15:26,072 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 18:15:26,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 229 treesize of output 200 [2024-11-08 18:15:27,134 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:15:27,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871143802] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:15:27,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:15:27,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 32 [2024-11-08 18:15:27,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480058976] [2024-11-08 18:15:27,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:15:27,135 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-08 18:15:27,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:15:27,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-08 18:15:27,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=889, Unknown=0, NotChecked=0, Total=1056 [2024-11-08 18:15:27,397 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-11-08 18:15:27,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 53 transitions, 336 flow. Second operand has 33 states, 33 states have (on average 12.909090909090908) internal successors, (426), 33 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:15:27,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:15:27,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-11-08 18:15:27,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:15:41,290 INFO L124 PetriNetUnfolderBase]: 6733/12872 cut-off events. [2024-11-08 18:15:41,291 INFO L125 PetriNetUnfolderBase]: For 18531/18535 co-relation queries the response was YES. [2024-11-08 18:15:41,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34126 conditions, 12872 events. 6733/12872 cut-off events. For 18531/18535 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 87387 event pairs, 835 based on Foata normal form. 51/11160 useless extension candidates. Maximal degree in co-relation 25149. Up to 2150 conditions per place. [2024-11-08 18:15:41,364 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 453 selfloop transitions, 147 changer transitions 151/758 dead transitions. [2024-11-08 18:15:41,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 758 transitions, 4516 flow [2024-11-08 18:15:41,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2024-11-08 18:15:41,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2024-11-08 18:15:41,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 1415 transitions. [2024-11-08 18:15:41,371 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4523657289002558 [2024-11-08 18:15:41,372 INFO L175 Difference]: Start difference. First operand has 63 places, 53 transitions, 336 flow. Second operand 68 states and 1415 transitions. [2024-11-08 18:15:41,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 758 transitions, 4516 flow [2024-11-08 18:15:41,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 758 transitions, 4505 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-11-08 18:15:41,396 INFO L231 Difference]: Finished difference. Result has 164 places, 210 transitions, 2310 flow [2024-11-08 18:15:41,396 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=2310, PETRI_PLACES=164, PETRI_TRANSITIONS=210} [2024-11-08 18:15:41,397 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 121 predicate places. [2024-11-08 18:15:41,397 INFO L471 AbstractCegarLoop]: Abstraction has has 164 places, 210 transitions, 2310 flow [2024-11-08 18:15:41,398 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 12.909090909090908) internal successors, (426), 33 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:15:41,398 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:15:41,398 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:15:41,420 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-08 18:15:41,602 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-08 18:15:41,603 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-08 18:15:41,604 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:15:41,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1569948343, now seen corresponding path program 2 times [2024-11-08 18:15:41,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:15:41,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772520734] [2024-11-08 18:15:41,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:15:41,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:15:41,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:15:42,923 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:15:42,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:15:42,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772520734] [2024-11-08 18:15:42,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772520734] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:15:42,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993517430] [2024-11-08 18:15:42,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 18:15:42,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:15:42,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:15:42,926 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:15:43,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 18:15:43,113 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 18:15:43,114 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:15:43,116 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-08 18:15:43,118 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:15:43,880 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:15:43,880 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:15:44,468 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 18:15:44,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 60 [2024-11-08 18:15:45,169 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:15:45,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993517430] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:15:45,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:15:45,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 29 [2024-11-08 18:15:45,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267458798] [2024-11-08 18:15:45,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:15:45,171 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-08 18:15:45,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:15:45,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-08 18:15:45,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=710, Unknown=0, NotChecked=0, Total=870 [2024-11-08 18:15:45,296 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-11-08 18:15:45,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 210 transitions, 2310 flow. Second operand has 30 states, 30 states have (on average 13.3) internal successors, (399), 30 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:15:45,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:15:45,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-11-08 18:15:45,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:15:57,216 INFO L124 PetriNetUnfolderBase]: 17931/34085 cut-off events. [2024-11-08 18:15:57,217 INFO L125 PetriNetUnfolderBase]: For 420569/420569 co-relation queries the response was YES. [2024-11-08 18:15:57,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132195 conditions, 34085 events. 17931/34085 cut-off events. For 420569/420569 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 280139 event pairs, 5251 based on Foata normal form. 142/31953 useless extension candidates. Maximal degree in co-relation 128259. Up to 9793 conditions per place. [2024-11-08 18:15:57,661 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 651 selfloop transitions, 227 changer transitions 138/1023 dead transitions. [2024-11-08 18:15:57,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 1023 transitions, 10781 flow [2024-11-08 18:15:57,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-11-08 18:15:57,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2024-11-08 18:15:57,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 1248 transitions. [2024-11-08 18:15:57,666 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4759725400457666 [2024-11-08 18:15:57,666 INFO L175 Difference]: Start difference. First operand has 164 places, 210 transitions, 2310 flow. Second operand 57 states and 1248 transitions. [2024-11-08 18:15:57,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 1023 transitions, 10781 flow [2024-11-08 18:15:58,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 1023 transitions, 8623 flow, removed 1072 selfloop flow, removed 5 redundant places. [2024-11-08 18:15:58,362 INFO L231 Difference]: Finished difference. Result has 247 places, 422 transitions, 4694 flow [2024-11-08 18:15:58,363 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1525, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=4694, PETRI_PLACES=247, PETRI_TRANSITIONS=422} [2024-11-08 18:15:58,363 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 204 predicate places. [2024-11-08 18:15:58,363 INFO L471 AbstractCegarLoop]: Abstraction has has 247 places, 422 transitions, 4694 flow [2024-11-08 18:15:58,364 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 13.3) internal successors, (399), 30 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:15:58,364 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:15:58,364 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:15:58,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-08 18:15:58,564 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-08 18:15:58,565 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-08 18:15:58,565 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:15:58,565 INFO L85 PathProgramCache]: Analyzing trace with hash 351771092, now seen corresponding path program 3 times [2024-11-08 18:15:58,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:15:58,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802205234] [2024-11-08 18:15:58,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:15:58,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:15:58,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:16:01,700 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:16:01,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:16:01,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802205234] [2024-11-08 18:16:01,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802205234] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:16:01,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142443217] [2024-11-08 18:16:01,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 18:16:01,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:16:01,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:16:01,705 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:16:01,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-08 18:16:01,833 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-08 18:16:01,833 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:16:01,837 INFO L255 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-08 18:16:01,840 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:16:02,345 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 18:16:02,345 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:16:02,749 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 18:16:02,750 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 60 [2024-11-08 18:16:02,997 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-08 18:16:02,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142443217] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:16:02,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:16:02,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 6] total 24 [2024-11-08 18:16:02,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802472498] [2024-11-08 18:16:02,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:16:02,999 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-08 18:16:02,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:16:03,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-08 18:16:03,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2024-11-08 18:16:03,287 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-11-08 18:16:03,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 422 transitions, 4694 flow. Second operand has 25 states, 25 states have (on average 14.8) internal successors, (370), 25 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:16:03,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:16:03,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-11-08 18:16:03,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:16:14,213 INFO L124 PetriNetUnfolderBase]: 19297/36683 cut-off events. [2024-11-08 18:16:14,213 INFO L125 PetriNetUnfolderBase]: For 967235/967235 co-relation queries the response was YES. [2024-11-08 18:16:14,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159683 conditions, 36683 events. 19297/36683 cut-off events. For 967235/967235 co-relation queries the response was YES. Maximal size of possible extension queue 593. Compared 306488 event pairs, 8415 based on Foata normal form. 4/34237 useless extension candidates. Maximal degree in co-relation 154211. Up to 26625 conditions per place. [2024-11-08 18:16:14,682 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 474 selfloop transitions, 66 changer transitions 67/618 dead transitions. [2024-11-08 18:16:14,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 618 transitions, 7345 flow [2024-11-08 18:16:14,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-08 18:16:14,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-08 18:16:14,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 460 transitions. [2024-11-08 18:16:14,685 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-11-08 18:16:14,685 INFO L175 Difference]: Start difference. First operand has 247 places, 422 transitions, 4694 flow. Second operand 22 states and 460 transitions. [2024-11-08 18:16:14,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 618 transitions, 7345 flow [2024-11-08 18:16:17,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 618 transitions, 6272 flow, removed 521 selfloop flow, removed 10 redundant places. [2024-11-08 18:16:17,961 INFO L231 Difference]: Finished difference. Result has 264 places, 442 transitions, 4157 flow [2024-11-08 18:16:17,962 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3701, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=4157, PETRI_PLACES=264, PETRI_TRANSITIONS=442} [2024-11-08 18:16:17,962 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 221 predicate places. [2024-11-08 18:16:17,962 INFO L471 AbstractCegarLoop]: Abstraction has has 264 places, 442 transitions, 4157 flow [2024-11-08 18:16:17,963 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 14.8) internal successors, (370), 25 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:16:17,963 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:16:17,963 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:16:17,977 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-08 18:16:18,165 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-08 18:16:18,165 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-08 18:16:18,165 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:16:18,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1543191740, now seen corresponding path program 4 times [2024-11-08 18:16:18,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:16:18,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069667625] [2024-11-08 18:16:18,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:16:18,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:16:18,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:16:18,279 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-08 18:16:18,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:16:18,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069667625] [2024-11-08 18:16:18,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069667625] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:16:18,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15219204] [2024-11-08 18:16:18,280 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 18:16:18,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:16:18,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:16:18,282 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:16:18,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-08 18:16:18,403 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 18:16:18,403 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:16:18,405 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-08 18:16:18,406 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:16:18,478 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-08 18:16:18,478 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:16:18,688 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-08 18:16:18,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15219204] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:16:18,689 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:16:18,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6] total 9 [2024-11-08 18:16:18,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997925275] [2024-11-08 18:16:18,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:16:18,690 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-08 18:16:18,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:16:18,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-08 18:16:18,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2024-11-08 18:16:18,691 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 46 [2024-11-08 18:16:18,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 442 transitions, 4157 flow. Second operand has 10 states, 10 states have (on average 18.8) internal successors, (188), 10 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:16:18,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:16:18,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 46 [2024-11-08 18:16:18,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:16:30,589 INFO L124 PetriNetUnfolderBase]: 23584/45444 cut-off events. [2024-11-08 18:16:30,590 INFO L125 PetriNetUnfolderBase]: For 1122349/1122349 co-relation queries the response was YES. [2024-11-08 18:16:31,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189928 conditions, 45444 events. 23584/45444 cut-off events. For 1122349/1122349 co-relation queries the response was YES. Maximal size of possible extension queue 771. Compared 394841 event pairs, 7846 based on Foata normal form. 208/42636 useless extension candidates. Maximal degree in co-relation 186877. Up to 23204 conditions per place. [2024-11-08 18:16:31,123 INFO L140 encePairwiseOnDemand]: 42/46 looper letters, 338 selfloop transitions, 222 changer transitions 0/576 dead transitions. [2024-11-08 18:16:31,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 576 transitions, 6749 flow [2024-11-08 18:16:31,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 18:16:31,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 18:16:31,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-11-08 18:16:31,124 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5782608695652174 [2024-11-08 18:16:31,124 INFO L175 Difference]: Start difference. First operand has 264 places, 442 transitions, 4157 flow. Second operand 5 states and 133 transitions. [2024-11-08 18:16:31,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 576 transitions, 6749 flow [2024-11-08 18:16:32,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 576 transitions, 6478 flow, removed 82 selfloop flow, removed 19 redundant places. [2024-11-08 18:16:32,888 INFO L231 Difference]: Finished difference. Result has 237 places, 527 transitions, 5974 flow [2024-11-08 18:16:32,889 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3580, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5974, PETRI_PLACES=237, PETRI_TRANSITIONS=527} [2024-11-08 18:16:32,889 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-11-08 18:16:32,890 INFO L471 AbstractCegarLoop]: Abstraction has has 237 places, 527 transitions, 5974 flow [2024-11-08 18:16:32,890 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.8) internal successors, (188), 10 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:16:32,890 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:16:32,890 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:16:32,907 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-08 18:16:33,094 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-08 18:16:33,095 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-08 18:16:33,095 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:16:33,095 INFO L85 PathProgramCache]: Analyzing trace with hash 997808502, now seen corresponding path program 5 times [2024-11-08 18:16:33,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:16:33,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626486274] [2024-11-08 18:16:33,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:16:33,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:16:33,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:16:33,299 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:16:33,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:16:33,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626486274] [2024-11-08 18:16:33,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626486274] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:16:33,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961835783] [2024-11-08 18:16:33,300 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 18:16:33,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:16:33,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:16:33,302 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:16:33,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-08 18:16:33,410 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-08 18:16:33,411 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:16:33,412 INFO L255 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-08 18:16:33,414 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:16:33,588 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 33 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:16:33,588 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:16:33,754 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:16:33,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961835783] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:16:33,754 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:16:33,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2024-11-08 18:16:33,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827110398] [2024-11-08 18:16:33,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:16:33,755 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-08 18:16:33,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:16:33,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-08 18:16:33,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2024-11-08 18:16:33,789 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-11-08 18:16:33,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 527 transitions, 5974 flow. Second operand has 21 states, 21 states have (on average 13.952380952380953) internal successors, (293), 21 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) [2024-11-08 18:16:33,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:16:33,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-11-08 18:16:33,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:16:36,943 INFO L124 PetriNetUnfolderBase]: 5408/10399 cut-off events. [2024-11-08 18:16:36,944 INFO L125 PetriNetUnfolderBase]: For 251690/251690 co-relation queries the response was YES. [2024-11-08 18:16:37,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47158 conditions, 10399 events. 5408/10399 cut-off events. For 251690/251690 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 74086 event pairs, 4481 based on Foata normal form. 55/9744 useless extension candidates. Maximal degree in co-relation 47075. Up to 8373 conditions per place. [2024-11-08 18:16:37,025 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 112 selfloop transitions, 9 changer transitions 61/189 dead transitions. [2024-11-08 18:16:37,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 189 transitions, 2315 flow [2024-11-08 18:16:37,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-08 18:16:37,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-08 18:16:37,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 210 transitions. [2024-11-08 18:16:37,027 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3804347826086957 [2024-11-08 18:16:37,027 INFO L175 Difference]: Start difference. First operand has 237 places, 527 transitions, 5974 flow. Second operand 12 states and 210 transitions. [2024-11-08 18:16:37,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 189 transitions, 2315 flow [2024-11-08 18:16:37,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 189 transitions, 2060 flow, removed 73 selfloop flow, removed 35 redundant places. [2024-11-08 18:16:37,288 INFO L231 Difference]: Finished difference. Result has 155 places, 125 transitions, 1407 flow [2024-11-08 18:16:37,288 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1576, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1407, PETRI_PLACES=155, PETRI_TRANSITIONS=125} [2024-11-08 18:16:37,288 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 112 predicate places. [2024-11-08 18:16:37,288 INFO L471 AbstractCegarLoop]: Abstraction has has 155 places, 125 transitions, 1407 flow [2024-11-08 18:16:37,289 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 13.952380952380953) internal successors, (293), 21 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) [2024-11-08 18:16:37,289 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:16:37,289 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:16:37,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-08 18:16:37,489 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-08 18:16:37,490 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-08 18:16:37,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:16:37,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1108369631, now seen corresponding path program 6 times [2024-11-08 18:16:37,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:16:37,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405520916] [2024-11-08 18:16:37,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:16:37,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:16:37,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:16:39,615 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:16:39,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:16:39,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405520916] [2024-11-08 18:16:39,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405520916] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:16:39,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937445821] [2024-11-08 18:16:39,616 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 18:16:39,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:16:39,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:16:39,617 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:16:39,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-08 18:16:39,742 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-08 18:16:39,743 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:16:39,745 INFO L255 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-08 18:16:39,748 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:16:40,787 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:16:40,787 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:16:41,755 INFO L349 Elim1Store]: treesize reduction 41, result has 60.2 percent of original size [2024-11-08 18:16:41,756 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 107 treesize of output 91 [2024-11-08 18:16:42,916 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:16:42,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937445821] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:16:42,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:16:42,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 38 [2024-11-08 18:16:42,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833889653] [2024-11-08 18:16:42,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:16:42,917 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-08 18:16:42,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:16:42,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-08 18:16:42,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1245, Unknown=0, NotChecked=0, Total=1482 [2024-11-08 18:16:43,138 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-11-08 18:16:43,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 125 transitions, 1407 flow. Second operand has 39 states, 39 states have (on average 13.23076923076923) internal successors, (516), 39 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:16:43,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:16:43,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-11-08 18:16:43,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:17:01,361 INFO L124 PetriNetUnfolderBase]: 16190/30809 cut-off events. [2024-11-08 18:17:01,361 INFO L125 PetriNetUnfolderBase]: For 233919/233919 co-relation queries the response was YES. [2024-11-08 18:17:01,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112828 conditions, 30809 events. 16190/30809 cut-off events. For 233919/233919 co-relation queries the response was YES. Maximal size of possible extension queue 780. Compared 260794 event pairs, 2953 based on Foata normal form. 192/28917 useless extension candidates. Maximal degree in co-relation 112777. Up to 5372 conditions per place. [2024-11-08 18:17:01,603 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 376 selfloop transitions, 322 changer transitions 214/919 dead transitions. [2024-11-08 18:17:01,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 919 transitions, 8946 flow [2024-11-08 18:17:01,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-11-08 18:17:01,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2024-11-08 18:17:01,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 1305 transitions. [2024-11-08 18:17:01,608 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4503105590062112 [2024-11-08 18:17:01,609 INFO L175 Difference]: Start difference. First operand has 155 places, 125 transitions, 1407 flow. Second operand 63 states and 1305 transitions. [2024-11-08 18:17:01,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 919 transitions, 8946 flow [2024-11-08 18:17:01,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 919 transitions, 8228 flow, removed 348 selfloop flow, removed 16 redundant places. [2024-11-08 18:17:01,885 INFO L231 Difference]: Finished difference. Result has 203 places, 426 transitions, 6363 flow [2024-11-08 18:17:01,885 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1351, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=6363, PETRI_PLACES=203, PETRI_TRANSITIONS=426} [2024-11-08 18:17:01,885 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-11-08 18:17:01,886 INFO L471 AbstractCegarLoop]: Abstraction has has 203 places, 426 transitions, 6363 flow [2024-11-08 18:17:01,886 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 13.23076923076923) internal successors, (516), 39 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:17:01,886 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:17:01,886 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:17:01,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-08 18:17:02,087 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:17:02,087 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-08 18:17:02,087 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:17:02,088 INFO L85 PathProgramCache]: Analyzing trace with hash -218628273, now seen corresponding path program 7 times [2024-11-08 18:17:02,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:17:02,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425983060] [2024-11-08 18:17:02,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:17:02,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:17:02,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:17:04,592 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 3 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:17:04,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:17:04,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425983060] [2024-11-08 18:17:04,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425983060] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:17:04,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524511305] [2024-11-08 18:17:04,593 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-08 18:17:04,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:17:04,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:17:04,596 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:17:04,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5c03e41-f2ee-456c-a09d-575c47a94064/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-08 18:17:04,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:17:04,716 INFO L255 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-08 18:17:04,719 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:17:04,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-08 18:17:06,011 INFO L349 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2024-11-08 18:17:06,011 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 60 treesize of output 24 [2024-11-08 18:17:06,031 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:17:06,032 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:17:08,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 151 [2024-11-08 18:17:08,244 INFO L349 Elim1Store]: treesize reduction 24, result has 78.0 percent of original size [2024-11-08 18:17:08,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 544 treesize of output 450 [2024-11-08 18:17:19,522 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:17:19,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524511305] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:17:19,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:17:19,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 15] total 41 [2024-11-08 18:17:19,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794474071] [2024-11-08 18:17:19,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:17:19,525 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-08 18:17:19,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:17:19,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-08 18:17:19,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1499, Unknown=0, NotChecked=0, Total=1722 [2024-11-08 18:17:19,944 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-11-08 18:17:19,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 426 transitions, 6363 flow. Second operand has 42 states, 42 states have (on average 12.928571428571429) internal successors, (543), 42 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:17:19,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:17:19,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-11-08 18:17:19,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand