./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-chromosome-symm.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_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/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_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/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_a98ef4a5-78d8-4281-8170-fc5ec0c26906/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 23ca06a4d1d66eab783b29fc3ce31114eee62eb7d17a2452b84e2d73b8d92cfa --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-08 18:21:21,599 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 18:21:21,690 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-08 18:21:21,694 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 18:21:21,694 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 18:21:21,731 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 18:21:21,732 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 18:21:21,732 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 18:21:21,733 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 18:21:21,733 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 18:21:21,733 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 18:21:21,734 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 18:21:21,734 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 18:21:21,735 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 18:21:21,735 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 18:21:21,735 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 18:21:21,738 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 18:21:21,742 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 18:21:21,742 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 18:21:21,743 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 18:21:21,743 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-08 18:21:21,743 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-08 18:21:21,744 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-08 18:21:21,744 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 18:21:21,744 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-08 18:21:21,744 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 18:21:21,744 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-08 18:21:21,745 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 18:21:21,745 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 18:21:21,745 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 18:21:21,746 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 18:21:21,746 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 18:21:21,746 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 18:21:21,746 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 18:21:21,748 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 18:21:21,748 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 18:21:21,749 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 18:21:21,749 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 18:21:21,750 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 18:21:21,750 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 18:21:21,751 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 18:21:21,751 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 18:21:21,751 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_a98ef4a5-78d8-4281-8170-fc5ec0c26906/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 23ca06a4d1d66eab783b29fc3ce31114eee62eb7d17a2452b84e2d73b8d92cfa [2024-11-08 18:21:22,025 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 18:21:22,047 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 18:21:22,050 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 18:21:22,051 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 18:21:22,051 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 18:21:22,052 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/../../sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c Unable to find full path for "g++" [2024-11-08 18:21:24,025 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 18:21:24,212 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 18:21:24,213 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c [2024-11-08 18:21:24,222 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/data/89625864f/ce4d88ec4a534629b3052098f53c9027/FLAG9c3dcee89 [2024-11-08 18:21:24,245 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/data/89625864f/ce4d88ec4a534629b3052098f53c9027 [2024-11-08 18:21:24,248 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 18:21:24,250 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 18:21:24,251 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 18:21:24,251 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 18:21:24,257 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 18:21:24,258 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 06:21:24" (1/1) ... [2024-11-08 18:21:24,259 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a03417 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:21:24, skipping insertion in model container [2024-11-08 18:21:24,260 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 06:21:24" (1/1) ... [2024-11-08 18:21:24,283 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 18:21:24,502 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 18:21:24,506 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 18:21:24,519 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 18:21:24,563 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 18:21:24,588 INFO L204 MainTranslator]: Completed translation [2024-11-08 18:21:24,589 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:21:24 WrapperNode [2024-11-08 18:21:24,589 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 18:21:24,590 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 18:21:24,590 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 18:21:24,590 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 18:21:24,599 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:21:24" (1/1) ... [2024-11-08 18:21:24,612 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:21:24" (1/1) ... [2024-11-08 18:21:24,658 INFO L138 Inliner]: procedures = 24, calls = 28, calls flagged for inlining = 16, calls inlined = 20, statements flattened = 189 [2024-11-08 18:21:24,659 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 18:21:24,663 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 18:21:24,663 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 18:21:24,663 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 18:21:24,677 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:21:24" (1/1) ... [2024-11-08 18:21:24,678 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:21:24" (1/1) ... [2024-11-08 18:21:24,682 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:21:24" (1/1) ... [2024-11-08 18:21:24,705 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-08 18:21:24,710 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:21:24" (1/1) ... [2024-11-08 18:21:24,710 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:21:24" (1/1) ... [2024-11-08 18:21:24,723 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:21:24" (1/1) ... [2024-11-08 18:21:24,726 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:21:24" (1/1) ... [2024-11-08 18:21:24,727 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:21:24" (1/1) ... [2024-11-08 18:21:24,729 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:21:24" (1/1) ... [2024-11-08 18:21:24,731 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 18:21:24,732 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 18:21:24,732 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 18:21:24,732 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 18:21:24,733 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:21:24" (1/1) ... [2024-11-08 18:21:24,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 18:21:24,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:21:24,766 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 18:21:24,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 18:21:24,803 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 18:21:24,803 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-08 18:21:24,803 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-08 18:21:24,804 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-08 18:21:24,805 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-08 18:21:24,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 18:21:24,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-08 18:21:24,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 18:21:24,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-08 18:21:24,806 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-08 18:21:24,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 18:21:24,806 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 18:21:24,806 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 18:21:24,806 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-08 18:21:24,810 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 18:21:24,970 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 18:21:24,972 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 18:21:25,441 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-08 18:21:25,445 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 18:21:25,916 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 18:21:25,917 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-08 18:21:25,918 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 06:21:25 BoogieIcfgContainer [2024-11-08 18:21:25,918 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 18:21:25,921 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 18:21:25,922 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 18:21:25,926 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 18:21:25,927 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 06:21:24" (1/3) ... [2024-11-08 18:21:25,928 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45ae1b24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 06:21:25, skipping insertion in model container [2024-11-08 18:21:25,928 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:21:24" (2/3) ... [2024-11-08 18:21:25,929 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45ae1b24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 06:21:25, skipping insertion in model container [2024-11-08 18:21:25,929 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 06:21:25" (3/3) ... [2024-11-08 18:21:25,931 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-symm.wvr.c [2024-11-08 18:21:25,952 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 18:21:25,953 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2024-11-08 18:21:25,953 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-08 18:21:26,041 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-08 18:21:26,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 54 transitions, 122 flow [2024-11-08 18:21:26,125 INFO L124 PetriNetUnfolderBase]: 8/52 cut-off events. [2024-11-08 18:21:26,125 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-08 18:21:26,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 52 events. 8/52 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 101 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 33. Up to 2 conditions per place. [2024-11-08 18:21:26,130 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 54 transitions, 122 flow [2024-11-08 18:21:26,134 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 51 transitions, 114 flow [2024-11-08 18:21:26,150 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 18:21:26,158 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;@738f7377, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 18:21:26,159 INFO L334 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2024-11-08 18:21:26,164 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-08 18:21:26,167 INFO L124 PetriNetUnfolderBase]: 3/10 cut-off events. [2024-11-08 18:21:26,167 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-08 18:21:26,167 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:21:26,168 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-08 18:21:26,169 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-08 18:21:26,174 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:21:26,175 INFO L85 PathProgramCache]: Analyzing trace with hash 20690574, now seen corresponding path program 1 times [2024-11-08 18:21:26,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:21:26,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464373854] [2024-11-08 18:21:26,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:21:26,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:21:26,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:21:26,497 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 18:21:26,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:21:26,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464373854] [2024-11-08 18:21:26,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464373854] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:21:26,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:21:26,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-08 18:21:26,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960019522] [2024-11-08 18:21:26,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:21:26,512 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 18:21:26,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:21:26,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 18:21:26,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 18:21:26,594 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 54 [2024-11-08 18:21:26,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 51 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 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 18:21:26,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:21:26,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 54 [2024-11-08 18:21:26,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:21:26,749 INFO L124 PetriNetUnfolderBase]: 46/127 cut-off events. [2024-11-08 18:21:26,749 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-08 18:21:26,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 127 events. 46/127 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 438 event pairs, 22 based on Foata normal form. 1/89 useless extension candidates. Maximal degree in co-relation 165. Up to 68 conditions per place. [2024-11-08 18:21:26,755 INFO L140 encePairwiseOnDemand]: 49/54 looper letters, 18 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2024-11-08 18:21:26,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 47 transitions, 146 flow [2024-11-08 18:21:26,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 18:21:26,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 18:21:26,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 113 transitions. [2024-11-08 18:21:26,772 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6975308641975309 [2024-11-08 18:21:26,773 INFO L175 Difference]: Start difference. First operand has 50 places, 51 transitions, 114 flow. Second operand 3 states and 113 transitions. [2024-11-08 18:21:26,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 47 transitions, 146 flow [2024-11-08 18:21:26,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 47 transitions, 138 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-08 18:21:26,784 INFO L231 Difference]: Finished difference. Result has 44 places, 47 transitions, 102 flow [2024-11-08 18:21:26,789 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=44, PETRI_TRANSITIONS=47} [2024-11-08 18:21:26,792 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, -6 predicate places. [2024-11-08 18:21:26,793 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 47 transitions, 102 flow [2024-11-08 18:21:26,793 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 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 18:21:26,793 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:21:26,793 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-08 18:21:26,794 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 18:21:26,794 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-08 18:21:26,796 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:21:26,797 INFO L85 PathProgramCache]: Analyzing trace with hash 20690575, now seen corresponding path program 1 times [2024-11-08 18:21:26,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:21:26,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642471329] [2024-11-08 18:21:26,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:21:26,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:21:26,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:21:27,103 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 18:21:27,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:21:27,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642471329] [2024-11-08 18:21:27,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642471329] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:21:27,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:21:27,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 18:21:27,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877435962] [2024-11-08 18:21:27,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:21:27,107 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 18:21:27,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:21:27,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 18:21:27,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-08 18:21:27,215 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 54 [2024-11-08 18:21:27,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 47 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 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 18:21:27,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:21:27,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 54 [2024-11-08 18:21:27,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:21:27,380 INFO L124 PetriNetUnfolderBase]: 46/133 cut-off events. [2024-11-08 18:21:27,381 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-08 18:21:27,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225 conditions, 133 events. 46/133 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 433 event pairs, 22 based on Foata normal form. 2/94 useless extension candidates. Maximal degree in co-relation 182. Up to 80 conditions per place. [2024-11-08 18:21:27,383 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 26 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2024-11-08 18:21:27,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 51 transitions, 170 flow [2024-11-08 18:21:27,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 18:21:27,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 18:21:27,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 114 transitions. [2024-11-08 18:21:27,386 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7037037037037037 [2024-11-08 18:21:27,386 INFO L175 Difference]: Start difference. First operand has 44 places, 47 transitions, 102 flow. Second operand 3 states and 114 transitions. [2024-11-08 18:21:27,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 51 transitions, 170 flow [2024-11-08 18:21:27,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 51 transitions, 166 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 18:21:27,389 INFO L231 Difference]: Finished difference. Result has 45 places, 49 transitions, 130 flow [2024-11-08 18:21:27,389 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=45, PETRI_TRANSITIONS=49} [2024-11-08 18:21:27,390 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, -5 predicate places. [2024-11-08 18:21:27,390 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 49 transitions, 130 flow [2024-11-08 18:21:27,390 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 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 18:21:27,390 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:21:27,393 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-08 18:21:27,393 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 18:21:27,393 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-08 18:21:27,394 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:21:27,396 INFO L85 PathProgramCache]: Analyzing trace with hash -2081699776, now seen corresponding path program 1 times [2024-11-08 18:21:27,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:21:27,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821166084] [2024-11-08 18:21:27,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:21:27,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:21:27,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:21:27,817 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 18:21:27,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:21:27,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821166084] [2024-11-08 18:21:27,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821166084] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:21:27,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380776308] [2024-11-08 18:21:27,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:21:27,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:21:27,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:21:27,822 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:21:27,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 18:21:27,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:21:27,906 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-08 18:21:27,911 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:21:27,971 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 6 treesize of output 5 [2024-11-08 18:21:28,074 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 18:21:28,074 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:21:28,197 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 18:21:28,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380776308] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:21:28,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:21:28,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-11-08 18:21:28,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064066574] [2024-11-08 18:21:28,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:21:28,199 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-08 18:21:28,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:21:28,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-08 18:21:28,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-08 18:21:28,490 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 54 [2024-11-08 18:21:28,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 49 transitions, 130 flow. Second operand has 9 states, 9 states have (on average 27.666666666666668) internal successors, (249), 9 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:21:28,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:21:28,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 54 [2024-11-08 18:21:28,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:21:28,814 INFO L124 PetriNetUnfolderBase]: 54/163 cut-off events. [2024-11-08 18:21:28,814 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-08 18:21:28,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 308 conditions, 163 events. 54/163 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 515 event pairs, 22 based on Foata normal form. 4/128 useless extension candidates. Maximal degree in co-relation 233. Up to 82 conditions per place. [2024-11-08 18:21:28,816 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 40 selfloop transitions, 14 changer transitions 0/75 dead transitions. [2024-11-08 18:21:28,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 75 transitions, 324 flow [2024-11-08 18:21:28,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 18:21:28,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 18:21:28,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 220 transitions. [2024-11-08 18:21:28,819 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6790123456790124 [2024-11-08 18:21:28,819 INFO L175 Difference]: Start difference. First operand has 45 places, 49 transitions, 130 flow. Second operand 6 states and 220 transitions. [2024-11-08 18:21:28,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 75 transitions, 324 flow [2024-11-08 18:21:28,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 75 transitions, 318 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 18:21:28,822 INFO L231 Difference]: Finished difference. Result has 52 places, 59 transitions, 232 flow [2024-11-08 18:21:28,822 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=232, PETRI_PLACES=52, PETRI_TRANSITIONS=59} [2024-11-08 18:21:28,823 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 2 predicate places. [2024-11-08 18:21:28,823 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 59 transitions, 232 flow [2024-11-08 18:21:28,824 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 27.666666666666668) internal successors, (249), 9 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:21:28,824 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:21:28,824 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1] [2024-11-08 18:21:28,847 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-08 18:21:29,024 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:21:29,025 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-08 18:21:29,026 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:21:29,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1313924273, now seen corresponding path program 2 times [2024-11-08 18:21:29,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:21:29,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472943829] [2024-11-08 18:21:29,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:21:29,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:21:29,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:21:29,615 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:21:29,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:21:29,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472943829] [2024-11-08 18:21:29,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472943829] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:21:29,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249938805] [2024-11-08 18:21:29,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 18:21:29,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:21:29,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:21:29,619 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:21:29,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 18:21:29,700 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 18:21:29,700 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:21:29,702 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-08 18:21:29,703 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:21:29,728 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 18:21:30,091 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:21:30,092 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:21:30,569 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:21:30,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249938805] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:21:30,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:21:30,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-11-08 18:21:30,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867918354] [2024-11-08 18:21:30,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:21:30,571 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-08 18:21:30,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:21:30,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-08 18:21:30,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2024-11-08 18:21:31,412 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 54 [2024-11-08 18:21:31,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 59 transitions, 232 flow. Second operand has 20 states, 20 states have (on average 26.4) internal successors, (528), 20 states have internal predecessors, (528), 0 states have call successors, (0), 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 18:21:31,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:21:31,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 54 [2024-11-08 18:21:31,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:21:32,093 INFO L124 PetriNetUnfolderBase]: 46/157 cut-off events. [2024-11-08 18:21:32,094 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2024-11-08 18:21:32,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325 conditions, 157 events. 46/157 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 434 event pairs, 22 based on Foata normal form. 16/136 useless extension candidates. Maximal degree in co-relation 221. Up to 69 conditions per place. [2024-11-08 18:21:32,095 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 39 selfloop transitions, 19 changer transitions 0/77 dead transitions. [2024-11-08 18:21:32,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 77 transitions, 366 flow [2024-11-08 18:21:32,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-08 18:21:32,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-08 18:21:32,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 290 transitions. [2024-11-08 18:21:32,098 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5967078189300411 [2024-11-08 18:21:32,098 INFO L175 Difference]: Start difference. First operand has 52 places, 59 transitions, 232 flow. Second operand 9 states and 290 transitions. [2024-11-08 18:21:32,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 77 transitions, 366 flow [2024-11-08 18:21:32,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 77 transitions, 337 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-11-08 18:21:32,102 INFO L231 Difference]: Finished difference. Result has 59 places, 59 transitions, 271 flow [2024-11-08 18:21:32,102 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=271, PETRI_PLACES=59, PETRI_TRANSITIONS=59} [2024-11-08 18:21:32,103 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 9 predicate places. [2024-11-08 18:21:32,103 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 59 transitions, 271 flow [2024-11-08 18:21:32,104 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 26.4) internal successors, (528), 20 states have internal predecessors, (528), 0 states have call successors, (0), 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 18:21:32,104 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:21:32,104 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:21:32,123 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-08 18:21:32,308 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:21:32,308 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-08 18:21:32,308 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:21:32,308 INFO L85 PathProgramCache]: Analyzing trace with hash -670919827, now seen corresponding path program 1 times [2024-11-08 18:21:32,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:21:32,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010644832] [2024-11-08 18:21:32,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:21:32,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:21:32,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:21:32,875 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2024-11-08 18:21:32,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:21:32,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010644832] [2024-11-08 18:21:32,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010644832] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:21:32,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555966446] [2024-11-08 18:21:32,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:21:32,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:21:32,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:21:32,881 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:21:32,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 18:21:32,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:21:32,992 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-08 18:21:32,995 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:21:33,005 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 6 treesize of output 5 [2024-11-08 18:21:33,011 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 18:21:33,177 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-08 18:21:33,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-08 18:21:33,198 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-08 18:21:33,198 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 11 treesize of output 11 [2024-11-08 18:21:33,757 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 5 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-08 18:21:33,757 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:21:34,467 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-08 18:21:34,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555966446] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-08 18:21:34,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-08 18:21:34,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6, 8] total 22 [2024-11-08 18:21:34,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757677930] [2024-11-08 18:21:34,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:21:34,470 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-08 18:21:34,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:21:34,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-08 18:21:34,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2024-11-08 18:21:34,922 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 54 [2024-11-08 18:21:34,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 59 transitions, 271 flow. Second operand has 10 states, 10 states have (on average 31.8) internal successors, (318), 10 states have internal predecessors, (318), 0 states have call successors, (0), 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 18:21:34,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:21:34,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 54 [2024-11-08 18:21:34,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:21:35,151 INFO L124 PetriNetUnfolderBase]: 102/299 cut-off events. [2024-11-08 18:21:35,152 INFO L125 PetriNetUnfolderBase]: For 82/82 co-relation queries the response was YES. [2024-11-08 18:21:35,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 578 conditions, 299 events. 102/299 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1227 event pairs, 31 based on Foata normal form. 0/228 useless extension candidates. Maximal degree in co-relation 436. Up to 79 conditions per place. [2024-11-08 18:21:35,155 INFO L140 encePairwiseOnDemand]: 47/54 looper letters, 37 selfloop transitions, 8 changer transitions 0/70 dead transitions. [2024-11-08 18:21:35,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 70 transitions, 386 flow [2024-11-08 18:21:35,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 18:21:35,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 18:21:35,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 214 transitions. [2024-11-08 18:21:35,156 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6604938271604939 [2024-11-08 18:21:35,156 INFO L175 Difference]: Start difference. First operand has 59 places, 59 transitions, 271 flow. Second operand 6 states and 214 transitions. [2024-11-08 18:21:35,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 70 transitions, 386 flow [2024-11-08 18:21:35,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 70 transitions, 349 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-11-08 18:21:35,164 INFO L231 Difference]: Finished difference. Result has 60 places, 60 transitions, 264 flow [2024-11-08 18:21:35,164 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=264, PETRI_PLACES=60, PETRI_TRANSITIONS=60} [2024-11-08 18:21:35,165 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 10 predicate places. [2024-11-08 18:21:35,166 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 60 transitions, 264 flow [2024-11-08 18:21:35,167 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 31.8) internal successors, (318), 10 states have internal predecessors, (318), 0 states have call successors, (0), 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 18:21:35,167 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:21:35,167 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:21:35,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-08 18:21:35,367 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:21:35,368 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-08 18:21:35,368 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:21:35,368 INFO L85 PathProgramCache]: Analyzing trace with hash -670919828, now seen corresponding path program 1 times [2024-11-08 18:21:35,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:21:35,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419505073] [2024-11-08 18:21:35,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:21:35,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:21:35,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:21:35,564 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-11-08 18:21:35,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:21:35,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419505073] [2024-11-08 18:21:35,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419505073] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:21:35,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:21:35,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 18:21:35,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563880195] [2024-11-08 18:21:35,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:21:35,566 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 18:21:35,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:21:35,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 18:21:35,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 18:21:35,616 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 54 [2024-11-08 18:21:35,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 60 transitions, 264 flow. Second operand has 5 states, 5 states have (on average 29.4) internal successors, (147), 5 states have internal predecessors, (147), 0 states have call successors, (0), 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 18:21:35,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:21:35,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 54 [2024-11-08 18:21:35,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:21:35,707 INFO L124 PetriNetUnfolderBase]: 91/262 cut-off events. [2024-11-08 18:21:35,707 INFO L125 PetriNetUnfolderBase]: For 138/138 co-relation queries the response was YES. [2024-11-08 18:21:35,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 572 conditions, 262 events. 91/262 cut-off events. For 138/138 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 978 event pairs, 51 based on Foata normal form. 13/221 useless extension candidates. Maximal degree in co-relation 423. Up to 133 conditions per place. [2024-11-08 18:21:35,710 INFO L140 encePairwiseOnDemand]: 49/54 looper letters, 29 selfloop transitions, 5 changer transitions 0/58 dead transitions. [2024-11-08 18:21:35,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 58 transitions, 328 flow [2024-11-08 18:21:35,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 18:21:35,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 18:21:35,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 158 transitions. [2024-11-08 18:21:35,711 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5851851851851851 [2024-11-08 18:21:35,711 INFO L175 Difference]: Start difference. First operand has 60 places, 60 transitions, 264 flow. Second operand 5 states and 158 transitions. [2024-11-08 18:21:35,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 58 transitions, 328 flow [2024-11-08 18:21:35,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 58 transitions, 317 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-08 18:21:35,714 INFO L231 Difference]: Finished difference. Result has 58 places, 58 transitions, 259 flow [2024-11-08 18:21:35,715 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=259, PETRI_PLACES=58, PETRI_TRANSITIONS=58} [2024-11-08 18:21:35,715 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 8 predicate places. [2024-11-08 18:21:35,715 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 58 transitions, 259 flow [2024-11-08 18:21:35,716 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.4) internal successors, (147), 5 states have internal predecessors, (147), 0 states have call successors, (0), 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 18:21:35,716 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:21:35,716 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:21:35,716 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-08 18:21:35,717 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-08 18:21:35,717 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:21:35,717 INFO L85 PathProgramCache]: Analyzing trace with hash 676322443, now seen corresponding path program 1 times [2024-11-08 18:21:35,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:21:35,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753261221] [2024-11-08 18:21:35,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:21:35,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:21:35,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:21:35,829 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-11-08 18:21:35,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:21:35,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753261221] [2024-11-08 18:21:35,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753261221] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:21:35,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:21:35,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 18:21:35,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502511190] [2024-11-08 18:21:35,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:21:35,830 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 18:21:35,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:21:35,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 18:21:35,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 18:21:35,875 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 54 [2024-11-08 18:21:35,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 58 transitions, 259 flow. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 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 18:21:35,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:21:35,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 54 [2024-11-08 18:21:35,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:21:35,987 INFO L124 PetriNetUnfolderBase]: 84/232 cut-off events. [2024-11-08 18:21:35,987 INFO L125 PetriNetUnfolderBase]: For 100/104 co-relation queries the response was YES. [2024-11-08 18:21:35,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 515 conditions, 232 events. 84/232 cut-off events. For 100/104 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 843 event pairs, 57 based on Foata normal form. 6/202 useless extension candidates. Maximal degree in co-relation 365. Up to 133 conditions per place. [2024-11-08 18:21:35,989 INFO L140 encePairwiseOnDemand]: 50/54 looper letters, 30 selfloop transitions, 3 changer transitions 0/56 dead transitions. [2024-11-08 18:21:35,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 56 transitions, 321 flow [2024-11-08 18:21:35,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 18:21:35,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 18:21:35,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 131 transitions. [2024-11-08 18:21:35,991 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6064814814814815 [2024-11-08 18:21:35,991 INFO L175 Difference]: Start difference. First operand has 58 places, 58 transitions, 259 flow. Second operand 4 states and 131 transitions. [2024-11-08 18:21:35,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 56 transitions, 321 flow [2024-11-08 18:21:35,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 56 transitions, 313 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 18:21:35,994 INFO L231 Difference]: Finished difference. Result has 56 places, 56 transitions, 253 flow [2024-11-08 18:21:35,994 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=253, PETRI_PLACES=56, PETRI_TRANSITIONS=56} [2024-11-08 18:21:35,995 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 6 predicate places. [2024-11-08 18:21:35,995 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 56 transitions, 253 flow [2024-11-08 18:21:35,995 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 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 18:21:35,996 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:21:35,996 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:21:35,996 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-08 18:21:35,996 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-08 18:21:35,997 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:21:35,997 INFO L85 PathProgramCache]: Analyzing trace with hash 676322444, now seen corresponding path program 1 times [2024-11-08 18:21:35,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:21:35,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103875334] [2024-11-08 18:21:35,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:21:35,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:21:36,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:21:36,429 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2024-11-08 18:21:36,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:21:36,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103875334] [2024-11-08 18:21:36,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103875334] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:21:36,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303589200] [2024-11-08 18:21:36,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:21:36,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:21:36,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:21:36,436 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:21:36,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 18:21:36,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:21:36,560 INFO L255 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-08 18:21:36,562 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:21:36,781 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 5 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-08 18:21:36,781 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:21:36,888 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 22 treesize of output 18 [2024-11-08 18:21:37,046 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 5 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-08 18:21:37,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303589200] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:21:37,047 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:21:37,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2024-11-08 18:21:37,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478443023] [2024-11-08 18:21:37,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:21:37,048 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-08 18:21:37,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:21:37,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-08 18:21:37,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2024-11-08 18:21:37,626 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 54 [2024-11-08 18:21:37,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 56 transitions, 253 flow. Second operand has 22 states, 22 states have (on average 27.5) internal successors, (605), 22 states have internal predecessors, (605), 0 states have call successors, (0), 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 18:21:37,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:21:37,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 54 [2024-11-08 18:21:37,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:21:38,132 INFO L124 PetriNetUnfolderBase]: 123/349 cut-off events. [2024-11-08 18:21:38,132 INFO L125 PetriNetUnfolderBase]: For 88/88 co-relation queries the response was YES. [2024-11-08 18:21:38,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 745 conditions, 349 events. 123/349 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1331 event pairs, 27 based on Foata normal form. 14/293 useless extension candidates. Maximal degree in co-relation 580. Up to 87 conditions per place. [2024-11-08 18:21:38,135 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 63 selfloop transitions, 16 changer transitions 0/94 dead transitions. [2024-11-08 18:21:38,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 94 transitions, 515 flow [2024-11-08 18:21:38,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-08 18:21:38,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-08 18:21:38,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 325 transitions. [2024-11-08 18:21:38,137 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6018518518518519 [2024-11-08 18:21:38,137 INFO L175 Difference]: Start difference. First operand has 56 places, 56 transitions, 253 flow. Second operand 10 states and 325 transitions. [2024-11-08 18:21:38,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 94 transitions, 515 flow [2024-11-08 18:21:38,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 94 transitions, 511 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 18:21:38,142 INFO L231 Difference]: Finished difference. Result has 65 places, 58 transitions, 301 flow [2024-11-08 18:21:38,142 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=301, PETRI_PLACES=65, PETRI_TRANSITIONS=58} [2024-11-08 18:21:38,142 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 15 predicate places. [2024-11-08 18:21:38,142 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 58 transitions, 301 flow [2024-11-08 18:21:38,143 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 27.5) internal successors, (605), 22 states have internal predecessors, (605), 0 states have call successors, (0), 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 18:21:38,143 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:21:38,143 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:21:38,163 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-08 18:21:38,343 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:21:38,344 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-08 18:21:38,344 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:21:38,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1487555861, now seen corresponding path program 1 times [2024-11-08 18:21:38,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:21:38,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869681956] [2024-11-08 18:21:38,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:21:38,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:21:38,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:21:38,750 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2024-11-08 18:21:38,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:21:38,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869681956] [2024-11-08 18:21:38,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869681956] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:21:38,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652416914] [2024-11-08 18:21:38,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:21:38,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:21:38,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:21:38,753 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:21:38,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 18:21:38,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:21:38,877 INFO L255 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-08 18:21:38,880 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:21:39,118 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 5 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-08 18:21:39,118 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:21:39,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 22 treesize of output 18 [2024-11-08 18:21:39,384 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 5 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-08 18:21:39,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652416914] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:21:39,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:21:39,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2024-11-08 18:21:39,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834004336] [2024-11-08 18:21:39,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:21:39,385 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-08 18:21:39,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:21:39,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-08 18:21:39,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2024-11-08 18:21:40,139 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 54 [2024-11-08 18:21:40,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 58 transitions, 301 flow. Second operand has 22 states, 22 states have (on average 28.272727272727273) internal successors, (622), 22 states have internal predecessors, (622), 0 states have call successors, (0), 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 18:21:40,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:21:40,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 54 [2024-11-08 18:21:40,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:21:40,721 INFO L124 PetriNetUnfolderBase]: 306/745 cut-off events. [2024-11-08 18:21:40,722 INFO L125 PetriNetUnfolderBase]: For 576/592 co-relation queries the response was YES. [2024-11-08 18:21:40,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1638 conditions, 745 events. 306/745 cut-off events. For 576/592 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 4017 event pairs, 84 based on Foata normal form. 0/605 useless extension candidates. Maximal degree in co-relation 1472. Up to 184 conditions per place. [2024-11-08 18:21:40,729 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 54 selfloop transitions, 17 changer transitions 0/89 dead transitions. [2024-11-08 18:21:40,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 89 transitions, 557 flow [2024-11-08 18:21:40,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-08 18:21:40,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-08 18:21:40,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 323 transitions. [2024-11-08 18:21:40,731 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5981481481481481 [2024-11-08 18:21:40,731 INFO L175 Difference]: Start difference. First operand has 65 places, 58 transitions, 301 flow. Second operand 10 states and 323 transitions. [2024-11-08 18:21:40,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 89 transitions, 557 flow [2024-11-08 18:21:40,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 89 transitions, 533 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-08 18:21:40,735 INFO L231 Difference]: Finished difference. Result has 71 places, 60 transitions, 331 flow [2024-11-08 18:21:40,735 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=331, PETRI_PLACES=71, PETRI_TRANSITIONS=60} [2024-11-08 18:21:40,737 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 21 predicate places. [2024-11-08 18:21:40,737 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 60 transitions, 331 flow [2024-11-08 18:21:40,738 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 28.272727272727273) internal successors, (622), 22 states have internal predecessors, (622), 0 states have call successors, (0), 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 18:21:40,738 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:21:40,739 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:21:40,760 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-08 18:21:40,943 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:21:40,943 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-08 18:21:40,943 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:21:40,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1130409178, now seen corresponding path program 1 times [2024-11-08 18:21:40,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:21:40,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001203481] [2024-11-08 18:21:40,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:21:40,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:21:40,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:21:41,361 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2024-11-08 18:21:41,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:21:41,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001203481] [2024-11-08 18:21:41,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001203481] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:21:41,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10392733] [2024-11-08 18:21:41,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:21:41,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:21:41,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:21:41,364 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:21:41,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 18:21:41,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:21:41,494 INFO L255 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-08 18:21:41,497 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:21:41,503 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 6 treesize of output 5 [2024-11-08 18:21:41,602 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-08 18:21:41,603 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-11-08 18:21:42,050 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-08 18:21:42,051 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:21:42,536 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-08 18:21:42,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10392733] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-08 18:21:42,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-08 18:21:42,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6, 9] total 23 [2024-11-08 18:21:42,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212325518] [2024-11-08 18:21:42,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:21:42,538 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-08 18:21:42,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:21:42,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-08 18:21:42,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2024-11-08 18:21:42,916 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 54 [2024-11-08 18:21:42,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 60 transitions, 331 flow. Second operand has 10 states, 10 states have (on average 33.0) internal successors, (330), 10 states have internal predecessors, (330), 0 states have call successors, (0), 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 18:21:42,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:21:42,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 54 [2024-11-08 18:21:42,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:21:43,199 INFO L124 PetriNetUnfolderBase]: 238/610 cut-off events. [2024-11-08 18:21:43,200 INFO L125 PetriNetUnfolderBase]: For 595/607 co-relation queries the response was YES. [2024-11-08 18:21:43,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1507 conditions, 610 events. 238/610 cut-off events. For 595/607 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3188 event pairs, 128 based on Foata normal form. 17/507 useless extension candidates. Maximal degree in co-relation 1341. Up to 272 conditions per place. [2024-11-08 18:21:43,206 INFO L140 encePairwiseOnDemand]: 48/54 looper letters, 39 selfloop transitions, 7 changer transitions 0/70 dead transitions. [2024-11-08 18:21:43,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 70 transitions, 469 flow [2024-11-08 18:21:43,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 18:21:43,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 18:21:43,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 217 transitions. [2024-11-08 18:21:43,208 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6697530864197531 [2024-11-08 18:21:43,208 INFO L175 Difference]: Start difference. First operand has 71 places, 60 transitions, 331 flow. Second operand 6 states and 217 transitions. [2024-11-08 18:21:43,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 70 transitions, 469 flow [2024-11-08 18:21:43,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 70 transitions, 445 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-08 18:21:43,211 INFO L231 Difference]: Finished difference. Result has 71 places, 60 transitions, 325 flow [2024-11-08 18:21:43,212 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=325, PETRI_PLACES=71, PETRI_TRANSITIONS=60} [2024-11-08 18:21:43,212 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 21 predicate places. [2024-11-08 18:21:43,212 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 60 transitions, 325 flow [2024-11-08 18:21:43,213 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 33.0) internal successors, (330), 10 states have internal predecessors, (330), 0 states have call successors, (0), 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 18:21:43,213 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:21:43,213 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:21:43,234 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-08 18:21:43,416 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-08 18:21:43,417 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-08 18:21:43,417 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:21:43,417 INFO L85 PathProgramCache]: Analyzing trace with hash 631023973, now seen corresponding path program 1 times [2024-11-08 18:21:43,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:21:43,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526390429] [2024-11-08 18:21:43,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:21:43,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:21:43,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:21:43,913 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2024-11-08 18:21:43,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:21:43,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526390429] [2024-11-08 18:21:43,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526390429] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:21:43,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112112734] [2024-11-08 18:21:43,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:21:43,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:21:43,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:21:43,916 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:21:43,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-08 18:21:44,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:21:44,041 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-08 18:21:44,044 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:21:44,051 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 6 treesize of output 5 [2024-11-08 18:21:44,056 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 18:21:44,229 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-08 18:21:44,229 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-08 18:21:44,245 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-08 18:21:44,245 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 11 treesize of output 11 [2024-11-08 18:21:44,795 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 30 proven. 8 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-08 18:21:44,795 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:21:45,481 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 35 proven. 3 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-08 18:21:45,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112112734] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:21:45,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:21:45,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 25 [2024-11-08 18:21:45,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305756412] [2024-11-08 18:21:45,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:21:45,482 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-08 18:21:45,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:21:45,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-08 18:21:45,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2024-11-08 18:21:46,898 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 54 [2024-11-08 18:21:46,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 60 transitions, 325 flow. Second operand has 27 states, 27 states have (on average 26.25925925925926) internal successors, (709), 27 states have internal predecessors, (709), 0 states have call successors, (0), 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 18:21:46,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:21:46,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 54 [2024-11-08 18:21:46,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:21:47,828 INFO L124 PetriNetUnfolderBase]: 469/1180 cut-off events. [2024-11-08 18:21:47,828 INFO L125 PetriNetUnfolderBase]: For 1255/1279 co-relation queries the response was YES. [2024-11-08 18:21:47,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2818 conditions, 1180 events. 469/1180 cut-off events. For 1255/1279 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 7033 event pairs, 75 based on Foata normal form. 48/1035 useless extension candidates. Maximal degree in co-relation 2654. Up to 154 conditions per place. [2024-11-08 18:21:47,838 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 77 selfloop transitions, 17 changer transitions 0/112 dead transitions. [2024-11-08 18:21:47,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 112 transitions, 715 flow [2024-11-08 18:21:47,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-08 18:21:47,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-08 18:21:47,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 420 transitions. [2024-11-08 18:21:47,840 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-11-08 18:21:47,840 INFO L175 Difference]: Start difference. First operand has 71 places, 60 transitions, 325 flow. Second operand 14 states and 420 transitions. [2024-11-08 18:21:47,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 112 transitions, 715 flow [2024-11-08 18:21:47,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 112 transitions, 685 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-08 18:21:47,845 INFO L231 Difference]: Finished difference. Result has 83 places, 62 transitions, 377 flow [2024-11-08 18:21:47,845 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=377, PETRI_PLACES=83, PETRI_TRANSITIONS=62} [2024-11-08 18:21:47,846 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 33 predicate places. [2024-11-08 18:21:47,846 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 62 transitions, 377 flow [2024-11-08 18:21:47,846 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 26.25925925925926) internal successors, (709), 27 states have internal predecessors, (709), 0 states have call successors, (0), 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 18:21:47,847 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:21:47,847 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:21:47,866 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-08 18:21:48,051 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-08 18:21:48,051 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-08 18:21:48,052 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:21:48,052 INFO L85 PathProgramCache]: Analyzing trace with hash 410132962, now seen corresponding path program 1 times [2024-11-08 18:21:48,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:21:48,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445595039] [2024-11-08 18:21:48,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:21:48,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:21:48,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:21:48,564 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2024-11-08 18:21:48,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:21:48,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445595039] [2024-11-08 18:21:48,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445595039] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:21:48,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579377525] [2024-11-08 18:21:48,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:21:48,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:21:48,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:21:48,567 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:21:48,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-08 18:21:48,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:21:48,698 INFO L255 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-08 18:21:48,701 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:21:48,711 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 18:21:48,718 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 6 treesize of output 5 [2024-11-08 18:21:48,871 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-08 18:21:48,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-08 18:21:48,893 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-08 18:21:48,894 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 11 treesize of output 11 [2024-11-08 18:21:49,497 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 30 proven. 9 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-08 18:21:49,498 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:21:50,100 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 35 proven. 4 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-08 18:21:50,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579377525] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:21:50,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:21:50,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 25 [2024-11-08 18:21:50,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605683521] [2024-11-08 18:21:50,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:21:50,101 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-08 18:21:50,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:21:50,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-08 18:21:50,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2024-11-08 18:21:51,373 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 54 [2024-11-08 18:21:51,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 62 transitions, 377 flow. Second operand has 27 states, 27 states have (on average 27.37037037037037) internal successors, (739), 27 states have internal predecessors, (739), 0 states have call successors, (0), 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 18:21:51,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:21:51,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 54 [2024-11-08 18:21:51,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:21:52,381 INFO L124 PetriNetUnfolderBase]: 599/1701 cut-off events. [2024-11-08 18:21:52,381 INFO L125 PetriNetUnfolderBase]: For 2309/2349 co-relation queries the response was YES. [2024-11-08 18:21:52,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4122 conditions, 1701 events. 599/1701 cut-off events. For 2309/2349 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 11392 event pairs, 138 based on Foata normal form. 81/1475 useless extension candidates. Maximal degree in co-relation 3948. Up to 307 conditions per place. [2024-11-08 18:21:52,395 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 76 selfloop transitions, 16 changer transitions 0/113 dead transitions. [2024-11-08 18:21:52,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 113 transitions, 871 flow [2024-11-08 18:21:52,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-08 18:21:52,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-08 18:21:52,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 422 transitions. [2024-11-08 18:21:52,397 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5582010582010583 [2024-11-08 18:21:52,397 INFO L175 Difference]: Start difference. First operand has 83 places, 62 transitions, 377 flow. Second operand 14 states and 422 transitions. [2024-11-08 18:21:52,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 113 transitions, 871 flow [2024-11-08 18:21:52,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 113 transitions, 808 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-11-08 18:21:52,404 INFO L231 Difference]: Finished difference. Result has 92 places, 65 transitions, 418 flow [2024-11-08 18:21:52,404 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=418, PETRI_PLACES=92, PETRI_TRANSITIONS=65} [2024-11-08 18:21:52,406 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 42 predicate places. [2024-11-08 18:21:52,407 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 65 transitions, 418 flow [2024-11-08 18:21:52,408 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 27.37037037037037) internal successors, (739), 27 states have internal predecessors, (739), 0 states have call successors, (0), 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 18:21:52,408 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:21:52,408 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:21:52,429 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-08 18:21:52,609 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-08 18:21:52,610 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-08 18:21:52,610 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:21:52,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1542279590, now seen corresponding path program 1 times [2024-11-08 18:21:52,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:21:52,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334987136] [2024-11-08 18:21:52,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:21:52,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:21:52,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:21:52,893 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 18:21:52,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:21:52,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334987136] [2024-11-08 18:21:52,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334987136] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:21:52,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:21:52,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 18:21:52,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626321233] [2024-11-08 18:21:52,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:21:52,894 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 18:21:52,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:21:52,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 18:21:52,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-08 18:21:52,917 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 54 [2024-11-08 18:21:52,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 65 transitions, 418 flow. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 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 18:21:52,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:21:52,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 54 [2024-11-08 18:21:52,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:21:53,292 INFO L124 PetriNetUnfolderBase]: 738/1513 cut-off events. [2024-11-08 18:21:53,292 INFO L125 PetriNetUnfolderBase]: For 2268/2292 co-relation queries the response was YES. [2024-11-08 18:21:53,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4295 conditions, 1513 events. 738/1513 cut-off events. For 2268/2292 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 8737 event pairs, 446 based on Foata normal form. 5/1307 useless extension candidates. Maximal degree in co-relation 4117. Up to 998 conditions per place. [2024-11-08 18:21:53,308 INFO L140 encePairwiseOnDemand]: 49/54 looper letters, 60 selfloop transitions, 4 changer transitions 2/90 dead transitions. [2024-11-08 18:21:53,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 90 transitions, 685 flow [2024-11-08 18:21:53,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 18:21:53,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 18:21:53,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 161 transitions. [2024-11-08 18:21:53,310 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7453703703703703 [2024-11-08 18:21:53,310 INFO L175 Difference]: Start difference. First operand has 92 places, 65 transitions, 418 flow. Second operand 4 states and 161 transitions. [2024-11-08 18:21:53,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 90 transitions, 685 flow [2024-11-08 18:21:53,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 90 transitions, 660 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-11-08 18:21:53,319 INFO L231 Difference]: Finished difference. Result has 88 places, 67 transitions, 420 flow [2024-11-08 18:21:53,319 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=420, PETRI_PLACES=88, PETRI_TRANSITIONS=67} [2024-11-08 18:21:53,320 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 38 predicate places. [2024-11-08 18:21:53,321 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 67 transitions, 420 flow [2024-11-08 18:21:53,321 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 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 18:21:53,321 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:21:53,321 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:21:53,321 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-08 18:21:53,321 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-08 18:21:53,322 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:21:53,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1798227796, now seen corresponding path program 2 times [2024-11-08 18:21:53,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:21:53,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180547600] [2024-11-08 18:21:53,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:21:53,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:21:53,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:21:53,569 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 18:21:53,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:21:53,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180547600] [2024-11-08 18:21:53,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180547600] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:21:53,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:21:53,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 18:21:53,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038843392] [2024-11-08 18:21:53,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:21:53,571 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 18:21:53,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:21:53,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 18:21:53,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 18:21:53,593 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 54 [2024-11-08 18:21:53,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 67 transitions, 420 flow. Second operand has 5 states, 5 states have (on average 31.8) internal successors, (159), 5 states have internal predecessors, (159), 0 states have call successors, (0), 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 18:21:53,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:21:53,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 54 [2024-11-08 18:21:53,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:21:54,101 INFO L124 PetriNetUnfolderBase]: 1103/2231 cut-off events. [2024-11-08 18:21:54,102 INFO L125 PetriNetUnfolderBase]: For 4676/4768 co-relation queries the response was YES. [2024-11-08 18:21:54,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6601 conditions, 2231 events. 1103/2231 cut-off events. For 4676/4768 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 13899 event pairs, 753 based on Foata normal form. 4/1944 useless extension candidates. Maximal degree in co-relation 6430. Up to 1544 conditions per place. [2024-11-08 18:21:54,122 INFO L140 encePairwiseOnDemand]: 49/54 looper letters, 61 selfloop transitions, 4 changer transitions 0/89 dead transitions. [2024-11-08 18:21:54,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 89 transitions, 673 flow [2024-11-08 18:21:54,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 18:21:54,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 18:21:54,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 154 transitions. [2024-11-08 18:21:54,123 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7129629629629629 [2024-11-08 18:21:54,124 INFO L175 Difference]: Start difference. First operand has 88 places, 67 transitions, 420 flow. Second operand 4 states and 154 transitions. [2024-11-08 18:21:54,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 89 transitions, 673 flow [2024-11-08 18:21:54,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 89 transitions, 663 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 18:21:54,133 INFO L231 Difference]: Finished difference. Result has 91 places, 69 transitions, 440 flow [2024-11-08 18:21:54,133 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=440, PETRI_PLACES=91, PETRI_TRANSITIONS=69} [2024-11-08 18:21:54,135 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 41 predicate places. [2024-11-08 18:21:54,135 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 69 transitions, 440 flow [2024-11-08 18:21:54,135 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.8) internal successors, (159), 5 states have internal predecessors, (159), 0 states have call successors, (0), 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 18:21:54,135 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:21:54,136 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:21:54,136 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-08 18:21:54,136 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-08 18:21:54,136 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:21:54,136 INFO L85 PathProgramCache]: Analyzing trace with hash 2116751742, now seen corresponding path program 3 times [2024-11-08 18:21:54,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:21:54,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976550392] [2024-11-08 18:21:54,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:21:54,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:21:54,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:21:54,376 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 18:21:54,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:21:54,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976550392] [2024-11-08 18:21:54,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976550392] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:21:54,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:21:54,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 18:21:54,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138353248] [2024-11-08 18:21:54,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:21:54,378 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 18:21:54,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:21:54,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 18:21:54,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 18:21:54,396 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 54 [2024-11-08 18:21:54,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 69 transitions, 440 flow. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 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 18:21:54,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:21:54,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 54 [2024-11-08 18:21:54,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:21:54,992 INFO L124 PetriNetUnfolderBase]: 1247/3034 cut-off events. [2024-11-08 18:21:54,992 INFO L125 PetriNetUnfolderBase]: For 5335/5396 co-relation queries the response was YES. [2024-11-08 18:21:55,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8633 conditions, 3034 events. 1247/3034 cut-off events. For 5335/5396 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 21344 event pairs, 685 based on Foata normal form. 44/3013 useless extension candidates. Maximal degree in co-relation 8460. Up to 1470 conditions per place. [2024-11-08 18:21:55,028 INFO L140 encePairwiseOnDemand]: 48/54 looper letters, 67 selfloop transitions, 4 changer transitions 0/95 dead transitions. [2024-11-08 18:21:55,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 95 transitions, 734 flow [2024-11-08 18:21:55,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 18:21:55,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 18:21:55,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 159 transitions. [2024-11-08 18:21:55,030 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7361111111111112 [2024-11-08 18:21:55,030 INFO L175 Difference]: Start difference. First operand has 91 places, 69 transitions, 440 flow. Second operand 4 states and 159 transitions. [2024-11-08 18:21:55,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 95 transitions, 734 flow [2024-11-08 18:21:55,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 95 transitions, 722 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 18:21:55,049 INFO L231 Difference]: Finished difference. Result has 94 places, 70 transitions, 463 flow [2024-11-08 18:21:55,049 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=463, PETRI_PLACES=94, PETRI_TRANSITIONS=70} [2024-11-08 18:21:55,049 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 44 predicate places. [2024-11-08 18:21:55,050 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 70 transitions, 463 flow [2024-11-08 18:21:55,050 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 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 18:21:55,050 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:21:55,051 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:21:55,051 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-08 18:21:55,051 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-08 18:21:55,051 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:21:55,051 INFO L85 PathProgramCache]: Analyzing trace with hash -871703636, now seen corresponding path program 4 times [2024-11-08 18:21:55,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:21:55,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892679075] [2024-11-08 18:21:55,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:21:55,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:21:55,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:21:55,293 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 18:21:55,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:21:55,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892679075] [2024-11-08 18:21:55,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892679075] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:21:55,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:21:55,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 18:21:55,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073433681] [2024-11-08 18:21:55,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:21:55,294 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 18:21:55,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:21:55,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 18:21:55,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 18:21:55,327 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 54 [2024-11-08 18:21:55,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 70 transitions, 463 flow. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 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 18:21:55,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:21:55,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 54 [2024-11-08 18:21:55,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:21:55,862 INFO L124 PetriNetUnfolderBase]: 1285/2698 cut-off events. [2024-11-08 18:21:55,862 INFO L125 PetriNetUnfolderBase]: For 6185/6267 co-relation queries the response was YES. [2024-11-08 18:21:55,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8291 conditions, 2698 events. 1285/2698 cut-off events. For 6185/6267 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 17457 event pairs, 801 based on Foata normal form. 56/2635 useless extension candidates. Maximal degree in co-relation 8116. Up to 1724 conditions per place. [2024-11-08 18:21:55,894 INFO L140 encePairwiseOnDemand]: 48/54 looper letters, 62 selfloop transitions, 5 changer transitions 0/91 dead transitions. [2024-11-08 18:21:55,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 91 transitions, 732 flow [2024-11-08 18:21:55,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 18:21:55,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 18:21:55,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 156 transitions. [2024-11-08 18:21:55,896 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7222222222222222 [2024-11-08 18:21:55,896 INFO L175 Difference]: Start difference. First operand has 94 places, 70 transitions, 463 flow. Second operand 4 states and 156 transitions. [2024-11-08 18:21:55,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 91 transitions, 732 flow [2024-11-08 18:21:55,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 91 transitions, 724 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-08 18:21:55,907 INFO L231 Difference]: Finished difference. Result has 98 places, 71 transitions, 492 flow [2024-11-08 18:21:55,907 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=453, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=492, PETRI_PLACES=98, PETRI_TRANSITIONS=71} [2024-11-08 18:21:55,908 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 48 predicate places. [2024-11-08 18:21:55,908 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 71 transitions, 492 flow [2024-11-08 18:21:55,908 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 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 18:21:55,908 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:21:55,908 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:21:55,908 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-08 18:21:55,909 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-08 18:21:55,909 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:21:55,909 INFO L85 PathProgramCache]: Analyzing trace with hash 764766876, now seen corresponding path program 1 times [2024-11-08 18:21:55,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:21:55,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980407685] [2024-11-08 18:21:55,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:21:55,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:21:55,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:21:56,323 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2024-11-08 18:21:56,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:21:56,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980407685] [2024-11-08 18:21:56,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980407685] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:21:56,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951292368] [2024-11-08 18:21:56,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:21:56,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:21:56,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:21:56,326 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:21:56,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-08 18:21:56,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:21:56,464 INFO L255 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-08 18:21:56,466 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:21:56,750 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 30 proven. 17 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-08 18:21:56,750 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:21:56,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2024-11-08 18:21:57,117 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 30 proven. 17 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-08 18:21:57,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951292368] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:21:57,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:21:57,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 28 [2024-11-08 18:21:57,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129656655] [2024-11-08 18:21:57,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:21:57,118 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-08 18:21:57,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:21:57,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-08 18:21:57,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2024-11-08 18:21:58,401 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 54 [2024-11-08 18:21:58,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 71 transitions, 492 flow. Second operand has 29 states, 29 states have (on average 27.17241379310345) internal successors, (788), 29 states have internal predecessors, (788), 0 states have call successors, (0), 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 18:21:58,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:21:58,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 54 [2024-11-08 18:21:58,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:21:59,553 INFO L124 PetriNetUnfolderBase]: 810/2297 cut-off events. [2024-11-08 18:21:59,553 INFO L125 PetriNetUnfolderBase]: For 6144/6182 co-relation queries the response was YES. [2024-11-08 18:21:59,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7024 conditions, 2297 events. 810/2297 cut-off events. For 6144/6182 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 16284 event pairs, 117 based on Foata normal form. 84/2333 useless extension candidates. Maximal degree in co-relation 6831. Up to 326 conditions per place. [2024-11-08 18:21:59,582 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 118 selfloop transitions, 20 changer transitions 0/159 dead transitions. [2024-11-08 18:21:59,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 159 transitions, 1249 flow [2024-11-08 18:21:59,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-08 18:21:59,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-08 18:21:59,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 434 transitions. [2024-11-08 18:21:59,584 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6182336182336182 [2024-11-08 18:21:59,584 INFO L175 Difference]: Start difference. First operand has 98 places, 71 transitions, 492 flow. Second operand 13 states and 434 transitions. [2024-11-08 18:21:59,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 159 transitions, 1249 flow [2024-11-08 18:21:59,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 159 transitions, 1234 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-08 18:21:59,597 INFO L231 Difference]: Finished difference. Result has 112 places, 73 transitions, 559 flow [2024-11-08 18:21:59,598 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=559, PETRI_PLACES=112, PETRI_TRANSITIONS=73} [2024-11-08 18:21:59,599 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 62 predicate places. [2024-11-08 18:21:59,599 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 73 transitions, 559 flow [2024-11-08 18:21:59,600 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 27.17241379310345) internal successors, (788), 29 states have internal predecessors, (788), 0 states have call successors, (0), 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 18:21:59,600 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:21:59,600 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:21:59,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-08 18:21:59,800 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-08 18:21:59,801 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-08 18:21:59,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:21:59,801 INFO L85 PathProgramCache]: Analyzing trace with hash -910193957, now seen corresponding path program 1 times [2024-11-08 18:21:59,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:21:59,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32886122] [2024-11-08 18:21:59,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:21:59,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:21:59,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:22:00,199 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2024-11-08 18:22:00,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:22:00,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32886122] [2024-11-08 18:22:00,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32886122] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:22:00,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378525652] [2024-11-08 18:22:00,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:22:00,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:22:00,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:22:00,202 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:22:00,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-08 18:22:00,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:22:00,354 INFO L255 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-08 18:22:00,355 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:22:00,644 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 30 proven. 15 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-08 18:22:00,644 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:22:00,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2024-11-08 18:22:00,965 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 30 proven. 15 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-08 18:22:00,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378525652] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:22:00,966 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:22:00,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 28 [2024-11-08 18:22:00,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372445308] [2024-11-08 18:22:00,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:22:00,966 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-08 18:22:00,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:22:00,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-08 18:22:00,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2024-11-08 18:22:02,128 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 54 [2024-11-08 18:22:02,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 73 transitions, 559 flow. Second operand has 29 states, 29 states have (on average 26.586206896551722) internal successors, (771), 29 states have internal predecessors, (771), 0 states have call successors, (0), 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 18:22:02,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:22:02,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 54 [2024-11-08 18:22:02,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:22:03,193 INFO L124 PetriNetUnfolderBase]: 1399/3172 cut-off events. [2024-11-08 18:22:03,193 INFO L125 PetriNetUnfolderBase]: For 9901/9995 co-relation queries the response was YES. [2024-11-08 18:22:03,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10127 conditions, 3172 events. 1399/3172 cut-off events. For 9901/9995 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 21272 event pairs, 200 based on Foata normal form. 108/3075 useless extension candidates. Maximal degree in co-relation 9919. Up to 410 conditions per place. [2024-11-08 18:22:03,223 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 118 selfloop transitions, 21 changer transitions 0/158 dead transitions. [2024-11-08 18:22:03,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 158 transitions, 1442 flow [2024-11-08 18:22:03,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-08 18:22:03,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-08 18:22:03,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 416 transitions. [2024-11-08 18:22:03,226 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2024-11-08 18:22:03,226 INFO L175 Difference]: Start difference. First operand has 112 places, 73 transitions, 559 flow. Second operand 13 states and 416 transitions. [2024-11-08 18:22:03,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 158 transitions, 1442 flow [2024-11-08 18:22:03,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 158 transitions, 1381 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-11-08 18:22:03,241 INFO L231 Difference]: Finished difference. Result has 119 places, 74 transitions, 597 flow [2024-11-08 18:22:03,242 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=528, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=597, PETRI_PLACES=119, PETRI_TRANSITIONS=74} [2024-11-08 18:22:03,242 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 69 predicate places. [2024-11-08 18:22:03,242 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 74 transitions, 597 flow [2024-11-08 18:22:03,243 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 26.586206896551722) internal successors, (771), 29 states have internal predecessors, (771), 0 states have call successors, (0), 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 18:22:03,243 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:22:03,243 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 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 18:22:03,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-08 18:22:03,444 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-08 18:22:03,444 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-08 18:22:03,444 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:22:03,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1062571858, now seen corresponding path program 1 times [2024-11-08 18:22:03,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:22:03,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38394880] [2024-11-08 18:22:03,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:22:03,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:22:03,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:22:03,655 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2024-11-08 18:22:03,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:22:03,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38394880] [2024-11-08 18:22:03,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38394880] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:22:03,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:22:03,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 18:22:03,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771924771] [2024-11-08 18:22:03,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:22:03,656 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 18:22:03,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:22:03,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 18:22:03,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 18:22:03,673 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 54 [2024-11-08 18:22:03,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 74 transitions, 597 flow. Second operand has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 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 18:22:03,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:22:03,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 54 [2024-11-08 18:22:03,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:22:04,222 INFO L124 PetriNetUnfolderBase]: 1209/3224 cut-off events. [2024-11-08 18:22:04,222 INFO L125 PetriNetUnfolderBase]: For 10441/10501 co-relation queries the response was YES. [2024-11-08 18:22:04,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10781 conditions, 3224 events. 1209/3224 cut-off events. For 10441/10501 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 23219 event pairs, 308 based on Foata normal form. 29/3253 useless extension candidates. Maximal degree in co-relation 10584. Up to 1689 conditions per place. [2024-11-08 18:22:04,247 INFO L140 encePairwiseOnDemand]: 48/54 looper letters, 59 selfloop transitions, 8 changer transitions 1/96 dead transitions. [2024-11-08 18:22:04,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 96 transitions, 925 flow [2024-11-08 18:22:04,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 18:22:04,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 18:22:04,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 156 transitions. [2024-11-08 18:22:04,249 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7222222222222222 [2024-11-08 18:22:04,249 INFO L175 Difference]: Start difference. First operand has 119 places, 74 transitions, 597 flow. Second operand 4 states and 156 transitions. [2024-11-08 18:22:04,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 96 transitions, 925 flow [2024-11-08 18:22:04,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 96 transitions, 871 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-11-08 18:22:04,273 INFO L231 Difference]: Finished difference. Result has 113 places, 75 transitions, 606 flow [2024-11-08 18:22:04,274 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=557, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=606, PETRI_PLACES=113, PETRI_TRANSITIONS=75} [2024-11-08 18:22:04,275 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 63 predicate places. [2024-11-08 18:22:04,275 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 75 transitions, 606 flow [2024-11-08 18:22:04,275 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 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 18:22:04,275 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:22:04,275 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 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 18:22:04,275 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-08 18:22:04,276 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-08 18:22:04,276 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:22:04,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1891101340, now seen corresponding path program 1 times [2024-11-08 18:22:04,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:22:04,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537839921] [2024-11-08 18:22:04,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:22:04,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:22:04,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:22:04,493 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2024-11-08 18:22:04,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:22:04,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537839921] [2024-11-08 18:22:04,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537839921] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:22:04,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:22:04,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 18:22:04,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101662864] [2024-11-08 18:22:04,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:22:04,495 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 18:22:04,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:22:04,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 18:22:04,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 18:22:04,516 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 54 [2024-11-08 18:22:04,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 75 transitions, 606 flow. Second operand has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 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 18:22:04,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:22:04,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 54 [2024-11-08 18:22:04,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:22:05,098 INFO L124 PetriNetUnfolderBase]: 1192/3050 cut-off events. [2024-11-08 18:22:05,099 INFO L125 PetriNetUnfolderBase]: For 11136/11203 co-relation queries the response was YES. [2024-11-08 18:22:05,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10064 conditions, 3050 events. 1192/3050 cut-off events. For 11136/11203 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 20776 event pairs, 64 based on Foata normal form. 22/3050 useless extension candidates. Maximal degree in co-relation 9874. Up to 1370 conditions per place. [2024-11-08 18:22:05,125 INFO L140 encePairwiseOnDemand]: 48/54 looper letters, 58 selfloop transitions, 9 changer transitions 1/95 dead transitions. [2024-11-08 18:22:05,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 95 transitions, 922 flow [2024-11-08 18:22:05,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 18:22:05,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 18:22:05,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 154 transitions. [2024-11-08 18:22:05,127 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7129629629629629 [2024-11-08 18:22:05,127 INFO L175 Difference]: Start difference. First operand has 113 places, 75 transitions, 606 flow. Second operand 4 states and 154 transitions. [2024-11-08 18:22:05,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 95 transitions, 922 flow [2024-11-08 18:22:05,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 95 transitions, 903 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-08 18:22:05,150 INFO L231 Difference]: Finished difference. Result has 113 places, 76 transitions, 646 flow [2024-11-08 18:22:05,150 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=590, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=646, PETRI_PLACES=113, PETRI_TRANSITIONS=76} [2024-11-08 18:22:05,151 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 63 predicate places. [2024-11-08 18:22:05,151 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 76 transitions, 646 flow [2024-11-08 18:22:05,151 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 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 18:22:05,151 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:22:05,151 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:22:05,152 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-08 18:22:05,152 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-08 18:22:05,152 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:22:05,152 INFO L85 PathProgramCache]: Analyzing trace with hash 601654093, now seen corresponding path program 2 times [2024-11-08 18:22:05,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:22:05,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637943149] [2024-11-08 18:22:05,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:22:05,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:22:05,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:22:05,720 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 41 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2024-11-08 18:22:05,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:22:05,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637943149] [2024-11-08 18:22:05,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637943149] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:22:05,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048365105] [2024-11-08 18:22:05,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 18:22:05,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:22:05,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:22:05,723 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:22:05,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-08 18:22:05,885 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 18:22:05,885 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:22:05,888 INFO L255 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-08 18:22:05,892 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:22:05,902 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 6 treesize of output 5 [2024-11-08 18:22:05,984 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-08 18:22:05,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-11-08 18:22:06,655 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-08 18:22:06,655 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:22:07,460 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 35 proven. 36 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-08 18:22:07,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048365105] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:22:07,460 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:22:07,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 12] total 35 [2024-11-08 18:22:07,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669928203] [2024-11-08 18:22:07,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:22:07,461 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-08 18:22:07,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:22:07,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-08 18:22:07,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1086, Unknown=0, NotChecked=0, Total=1332 [2024-11-08 18:22:09,212 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 54 [2024-11-08 18:22:09,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 76 transitions, 646 flow. Second operand has 37 states, 37 states have (on average 22.54054054054054) internal successors, (834), 37 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:22:09,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:22:09,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 54 [2024-11-08 18:22:09,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:22:10,911 INFO L124 PetriNetUnfolderBase]: 1166/2801 cut-off events. [2024-11-08 18:22:10,911 INFO L125 PetriNetUnfolderBase]: For 13596/13658 co-relation queries the response was YES. [2024-11-08 18:22:10,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9920 conditions, 2801 events. 1166/2801 cut-off events. For 13596/13658 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 19185 event pairs, 146 based on Foata normal form. 30/2796 useless extension candidates. Maximal degree in co-relation 9679. Up to 342 conditions per place. [2024-11-08 18:22:10,934 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 140 selfloop transitions, 29 changer transitions 0/186 dead transitions. [2024-11-08 18:22:10,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 186 transitions, 1744 flow [2024-11-08 18:22:10,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-08 18:22:10,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-08 18:22:10,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 567 transitions. [2024-11-08 18:22:10,937 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-11-08 18:22:10,937 INFO L175 Difference]: Start difference. First operand has 113 places, 76 transitions, 646 flow. Second operand 22 states and 567 transitions. [2024-11-08 18:22:10,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 186 transitions, 1744 flow [2024-11-08 18:22:10,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 186 transitions, 1721 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-08 18:22:10,959 INFO L231 Difference]: Finished difference. Result has 132 places, 80 transitions, 736 flow [2024-11-08 18:22:10,959 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=629, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=736, PETRI_PLACES=132, PETRI_TRANSITIONS=80} [2024-11-08 18:22:10,960 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 82 predicate places. [2024-11-08 18:22:10,960 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 80 transitions, 736 flow [2024-11-08 18:22:10,960 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 22.54054054054054) internal successors, (834), 37 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:22:10,961 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:22:10,961 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 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, 1] [2024-11-08 18:22:10,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-08 18:22:11,165 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:22:11,165 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-08 18:22:11,166 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:22:11,166 INFO L85 PathProgramCache]: Analyzing trace with hash 266317834, now seen corresponding path program 1 times [2024-11-08 18:22:11,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:22:11,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142864547] [2024-11-08 18:22:11,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:22:11,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:22:11,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:22:12,448 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 18:22:12,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:22:12,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142864547] [2024-11-08 18:22:12,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142864547] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:22:12,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810148657] [2024-11-08 18:22:12,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:22:12,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:22:12,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:22:12,450 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:22:12,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-08 18:22:12,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:22:12,608 INFO L255 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-08 18:22:12,609 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:22:12,914 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 18:22:12,914 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 27 treesize of output 23 [2024-11-08 18:22:13,004 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 18:22:13,004 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:22:42,469 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-11-08 18:22:42,470 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 50 treesize of output 50 [2024-11-08 18:22:42,536 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 18:22:42,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810148657] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:22:42,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:22:42,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 34 [2024-11-08 18:22:42,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324104365] [2024-11-08 18:22:42,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:22:42,537 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-08 18:22:42,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:22:42,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-08 18:22:42,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=986, Unknown=5, NotChecked=0, Total=1122 [2024-11-08 18:22:46,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:22:50,647 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:22:54,780 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:22:58,880 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:23:02,954 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:23:07,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:23:11,082 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:23:15,239 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:23:19,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:23:23,364 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:23:27,417 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:23:31,481 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:23:35,497 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:23:35,497 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-11-08 18:23:35,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 80 transitions, 736 flow. Second operand has 34 states, 34 states have (on average 14.058823529411764) internal successors, (478), 34 states have internal predecessors, (478), 0 states have call successors, (0), 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 18:23:35,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:23:35,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-11-08 18:23:35,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:23:38,798 INFO L124 PetriNetUnfolderBase]: 6098/9793 cut-off events. [2024-11-08 18:23:38,798 INFO L125 PetriNetUnfolderBase]: For 30697/30697 co-relation queries the response was YES. [2024-11-08 18:23:38,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35146 conditions, 9793 events. 6098/9793 cut-off events. For 30697/30697 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 52298 event pairs, 2512 based on Foata normal form. 5/9798 useless extension candidates. Maximal degree in co-relation 34984. Up to 8045 conditions per place. [2024-11-08 18:23:38,877 INFO L140 encePairwiseOnDemand]: 38/54 looper letters, 136 selfloop transitions, 29 changer transitions 2/176 dead transitions. [2024-11-08 18:23:38,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 176 transitions, 1650 flow [2024-11-08 18:23:38,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-08 18:23:38,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-08 18:23:38,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 300 transitions. [2024-11-08 18:23:38,879 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-11-08 18:23:38,879 INFO L175 Difference]: Start difference. First operand has 132 places, 80 transitions, 736 flow. Second operand 15 states and 300 transitions. [2024-11-08 18:23:38,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 176 transitions, 1650 flow [2024-11-08 18:23:38,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 176 transitions, 1580 flow, removed 1 selfloop flow, removed 17 redundant places. [2024-11-08 18:23:38,933 INFO L231 Difference]: Finished difference. Result has 136 places, 98 transitions, 949 flow [2024-11-08 18:23:38,934 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=676, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=949, PETRI_PLACES=136, PETRI_TRANSITIONS=98} [2024-11-08 18:23:38,934 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 86 predicate places. [2024-11-08 18:23:38,935 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 98 transitions, 949 flow [2024-11-08 18:23:38,935 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 14.058823529411764) internal successors, (478), 34 states have internal predecessors, (478), 0 states have call successors, (0), 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 18:23:38,935 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:23:38,935 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 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, 1] [2024-11-08 18:23:38,956 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-08 18:23:39,136 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:23:39,136 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-08 18:23:39,137 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:23:39,137 INFO L85 PathProgramCache]: Analyzing trace with hash 2054670476, now seen corresponding path program 2 times [2024-11-08 18:23:39,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:23:39,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105157226] [2024-11-08 18:23:39,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:23:39,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:23:39,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:23:40,854 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 18:23:40,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:23:40,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105157226] [2024-11-08 18:23:40,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105157226] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:23:40,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569757673] [2024-11-08 18:23:40,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 18:23:40,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:23:40,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:23:40,858 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:23:40,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-08 18:23:41,024 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 18:23:41,024 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:23:41,026 INFO L255 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-08 18:23:41,028 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:23:41,626 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 18:23:41,626 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 27 treesize of output 19 [2024-11-08 18:23:41,749 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 18:23:41,749 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:23:43,042 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-11-08 18:23:43,042 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 40 treesize of output 56 [2024-11-08 18:23:43,079 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2024-11-08 18:23:43,079 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 19 treesize of output 11 [2024-11-08 18:23:43,096 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-11-08 18:23:43,096 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 58 treesize of output 1 [2024-11-08 18:23:43,109 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-11-08 18:23:43,109 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 58 treesize of output 1 [2024-11-08 18:23:43,120 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-11-08 18:23:43,120 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 40 treesize of output 1 [2024-11-08 18:23:43,129 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-11-08 18:23:43,130 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 58 treesize of output 1 [2024-11-08 18:23:43,140 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-11-08 18:23:43,141 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 58 treesize of output 1 [2024-11-08 18:23:43,218 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 18:23:43,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569757673] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:23:43,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:23:43,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 38 [2024-11-08 18:23:43,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064086893] [2024-11-08 18:23:43,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:23:43,219 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-08 18:23:43,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:23:43,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-08 18:23:43,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1269, Unknown=0, NotChecked=0, Total=1406 [2024-11-08 18:23:45,887 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 54 [2024-11-08 18:23:45,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 98 transitions, 949 flow. Second operand has 38 states, 38 states have (on average 24.210526315789473) internal successors, (920), 38 states have internal predecessors, (920), 0 states have call successors, (0), 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 18:23:45,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:23:45,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 54 [2024-11-08 18:23:45,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:23:50,403 INFO L124 PetriNetUnfolderBase]: 5859/9704 cut-off events. [2024-11-08 18:23:50,403 INFO L125 PetriNetUnfolderBase]: For 37326/37362 co-relation queries the response was YES. [2024-11-08 18:23:50,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38823 conditions, 9704 events. 5859/9704 cut-off events. For 37326/37362 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 54257 event pairs, 2514 based on Foata normal form. 13/9717 useless extension candidates. Maximal degree in co-relation 38666. Up to 7516 conditions per place. [2024-11-08 18:23:50,482 INFO L140 encePairwiseOnDemand]: 36/54 looper letters, 143 selfloop transitions, 47 changer transitions 10/213 dead transitions. [2024-11-08 18:23:50,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 213 transitions, 2043 flow [2024-11-08 18:23:50,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-08 18:23:50,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-08 18:23:50,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 568 transitions. [2024-11-08 18:23:50,484 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5536062378167641 [2024-11-08 18:23:50,484 INFO L175 Difference]: Start difference. First operand has 136 places, 98 transitions, 949 flow. Second operand 19 states and 568 transitions. [2024-11-08 18:23:50,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 213 transitions, 2043 flow [2024-11-08 18:23:50,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 213 transitions, 1961 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-11-08 18:23:50,708 INFO L231 Difference]: Finished difference. Result has 160 places, 130 transitions, 1384 flow [2024-11-08 18:23:50,708 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=884, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1384, PETRI_PLACES=160, PETRI_TRANSITIONS=130} [2024-11-08 18:23:50,709 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 110 predicate places. [2024-11-08 18:23:50,709 INFO L471 AbstractCegarLoop]: Abstraction has has 160 places, 130 transitions, 1384 flow [2024-11-08 18:23:50,710 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 24.210526315789473) internal successors, (920), 38 states have internal predecessors, (920), 0 states have call successors, (0), 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 18:23:50,710 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:23:50,710 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 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, 1] [2024-11-08 18:23:50,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-08 18:23:50,910 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:23:50,911 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-08 18:23:50,911 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:23:50,911 INFO L85 PathProgramCache]: Analyzing trace with hash -2136422216, now seen corresponding path program 3 times [2024-11-08 18:23:50,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:23:50,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348932638] [2024-11-08 18:23:50,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:23:50,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:23:50,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:23:52,301 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 18:23:52,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:23:52,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348932638] [2024-11-08 18:23:52,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348932638] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:23:52,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755894014] [2024-11-08 18:23:52,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 18:23:52,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:23:52,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:23:52,304 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:23:52,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-08 18:23:52,460 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-08 18:23:52,460 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:23:52,462 INFO L255 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-08 18:23:52,464 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:23:53,148 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 18:23:53,149 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 27 treesize of output 19 [2024-11-08 18:23:53,262 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 18:23:53,263 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:23:54,349 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-11-08 18:23:54,349 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 42 treesize of output 50 [2024-11-08 18:23:54,426 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 18:23:54,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755894014] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:23:54,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:23:54,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 37 [2024-11-08 18:23:54,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085423449] [2024-11-08 18:23:54,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:23:54,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-08 18:23:54,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:23:54,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-08 18:23:54,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1197, Unknown=0, NotChecked=0, Total=1332 [2024-11-08 18:23:57,353 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 54 [2024-11-08 18:23:57,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 130 transitions, 1384 flow. Second operand has 37 states, 37 states have (on average 24.27027027027027) internal successors, (898), 37 states have internal predecessors, (898), 0 states have call successors, (0), 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 18:23:57,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:23:57,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 54 [2024-11-08 18:23:57,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:24:01,776 INFO L124 PetriNetUnfolderBase]: 6048/9959 cut-off events. [2024-11-08 18:24:01,776 INFO L125 PetriNetUnfolderBase]: For 53482/53544 co-relation queries the response was YES. [2024-11-08 18:24:01,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45327 conditions, 9959 events. 6048/9959 cut-off events. For 53482/53544 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 56056 event pairs, 1948 based on Foata normal form. 9/9968 useless extension candidates. Maximal degree in co-relation 45159. Up to 5813 conditions per place. [2024-11-08 18:24:01,868 INFO L140 encePairwiseOnDemand]: 37/54 looper letters, 210 selfloop transitions, 52 changer transitions 7/282 dead transitions. [2024-11-08 18:24:01,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 282 transitions, 3159 flow [2024-11-08 18:24:01,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-08 18:24:01,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-08 18:24:01,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 554 transitions. [2024-11-08 18:24:01,870 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5699588477366255 [2024-11-08 18:24:01,870 INFO L175 Difference]: Start difference. First operand has 160 places, 130 transitions, 1384 flow. Second operand 18 states and 554 transitions. [2024-11-08 18:24:01,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 282 transitions, 3159 flow [2024-11-08 18:24:02,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 282 transitions, 3016 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-11-08 18:24:02,101 INFO L231 Difference]: Finished difference. Result has 179 places, 152 transitions, 1729 flow [2024-11-08 18:24:02,101 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1283, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1729, PETRI_PLACES=179, PETRI_TRANSITIONS=152} [2024-11-08 18:24:02,102 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 129 predicate places. [2024-11-08 18:24:02,102 INFO L471 AbstractCegarLoop]: Abstraction has has 179 places, 152 transitions, 1729 flow [2024-11-08 18:24:02,102 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 24.27027027027027) internal successors, (898), 37 states have internal predecessors, (898), 0 states have call successors, (0), 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 18:24:02,102 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:24:02,102 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 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, 1] [2024-11-08 18:24:02,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-08 18:24:02,303 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-08 18:24:02,303 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-08 18:24:02,303 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:24:02,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1578594624, now seen corresponding path program 4 times [2024-11-08 18:24:02,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:24:02,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404405790] [2024-11-08 18:24:02,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:24:02,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:24:02,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:24:03,521 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 18:24:03,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:24:03,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404405790] [2024-11-08 18:24:03,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404405790] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:24:03,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114911506] [2024-11-08 18:24:03,522 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 18:24:03,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:24:03,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:24:03,523 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:24:03,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-08 18:24:03,735 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 18:24:03,735 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:24:03,738 INFO L255 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-08 18:24:03,740 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:24:04,130 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 18:24:04,131 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 27 treesize of output 23 [2024-11-08 18:24:04,222 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 18:24:04,223 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:24:17,365 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-11-08 18:24:17,366 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 58 treesize of output 58 [2024-11-08 18:24:17,419 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-11-08 18:24:17,420 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 58 treesize of output 1 [2024-11-08 18:24:17,429 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-11-08 18:24:17,429 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 40 treesize of output 1 [2024-11-08 18:24:17,444 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2024-11-08 18:24:17,445 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 19 treesize of output 11 [2024-11-08 18:24:17,458 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-11-08 18:24:17,459 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 58 treesize of output 1 [2024-11-08 18:24:17,462 WARN L214 Elim1Store]: Array PQE input equivalent to true [2024-11-08 18:24:17,479 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-11-08 18:24:17,480 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 40 treesize of output 1 [2024-11-08 18:24:17,491 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-11-08 18:24:17,491 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 58 treesize of output 1 [2024-11-08 18:24:17,603 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 18:24:17,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114911506] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:24:17,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:24:17,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 37 [2024-11-08 18:24:17,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075412380] [2024-11-08 18:24:17,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:24:17,604 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-08 18:24:17,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:24:17,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-08 18:24:17,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1179, Unknown=1, NotChecked=0, Total=1332 [2024-11-08 18:24:22,355 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:24:26,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:24:30,643 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:24:35,330 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:24:39,473 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:24:43,810 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:24:43,883 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-11-08 18:24:43,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 152 transitions, 1729 flow. Second operand has 37 states, 37 states have (on average 18.18918918918919) internal successors, (673), 37 states have internal predecessors, (673), 0 states have call successors, (0), 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 18:24:43,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:24:43,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-11-08 18:24:43,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:24:47,947 INFO L124 PetriNetUnfolderBase]: 6713/10786 cut-off events. [2024-11-08 18:24:47,947 INFO L125 PetriNetUnfolderBase]: For 77907/77907 co-relation queries the response was YES. [2024-11-08 18:24:48,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54583 conditions, 10786 events. 6713/10786 cut-off events. For 77907/77907 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 58663 event pairs, 2792 based on Foata normal form. 5/10791 useless extension candidates. Maximal degree in co-relation 54410. Up to 9018 conditions per place. [2024-11-08 18:24:48,065 INFO L140 encePairwiseOnDemand]: 37/54 looper letters, 184 selfloop transitions, 49 changer transitions 2/244 dead transitions. [2024-11-08 18:24:48,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 244 transitions, 3029 flow [2024-11-08 18:24:48,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-08 18:24:48,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-08 18:24:48,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 404 transitions. [2024-11-08 18:24:48,066 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4400871459694989 [2024-11-08 18:24:48,066 INFO L175 Difference]: Start difference. First operand has 179 places, 152 transitions, 1729 flow. Second operand 17 states and 404 transitions. [2024-11-08 18:24:48,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 244 transitions, 3029 flow [2024-11-08 18:24:48,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 244 transitions, 2778 flow, removed 68 selfloop flow, removed 11 redundant places. [2024-11-08 18:24:48,352 INFO L231 Difference]: Finished difference. Result has 190 places, 175 transitions, 2000 flow [2024-11-08 18:24:48,353 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1515, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2000, PETRI_PLACES=190, PETRI_TRANSITIONS=175} [2024-11-08 18:24:48,353 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 140 predicate places. [2024-11-08 18:24:48,353 INFO L471 AbstractCegarLoop]: Abstraction has has 190 places, 175 transitions, 2000 flow [2024-11-08 18:24:48,354 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 18.18918918918919) internal successors, (673), 37 states have internal predecessors, (673), 0 states have call successors, (0), 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 18:24:48,354 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:24:48,354 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 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, 1] [2024-11-08 18:24:48,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-08 18:24:48,554 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-08 18:24:48,555 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-08 18:24:48,555 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:24:48,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1735106454, now seen corresponding path program 5 times [2024-11-08 18:24:48,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:24:48,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022408664] [2024-11-08 18:24:48,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:24:48,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:24:48,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:24:50,198 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 18:24:50,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:24:50,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022408664] [2024-11-08 18:24:50,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022408664] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:24:50,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272700511] [2024-11-08 18:24:50,199 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 18:24:50,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:24:50,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:24:50,201 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:24:50,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-08 18:24:50,494 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-08 18:24:50,495 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:24:50,497 INFO L255 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-08 18:24:50,498 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:24:51,171 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 18:24:51,171 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 27 treesize of output 19 [2024-11-08 18:24:51,303 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 18:24:51,304 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:24:52,849 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-11-08 18:24:52,850 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 42 treesize of output 50 [2024-11-08 18:24:52,959 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 18:24:52,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272700511] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:24:52,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:24:52,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 37 [2024-11-08 18:24:52,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265240849] [2024-11-08 18:24:52,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:24:52,961 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-08 18:24:52,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:24:52,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-08 18:24:52,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1203, Unknown=0, NotChecked=0, Total=1332 [2024-11-08 18:24:56,704 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 54 [2024-11-08 18:24:56,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 175 transitions, 2000 flow. Second operand has 37 states, 37 states have (on average 24.27027027027027) internal successors, (898), 37 states have internal predecessors, (898), 0 states have call successors, (0), 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 18:24:56,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:24:56,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 54 [2024-11-08 18:24:56,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:25:01,356 INFO L124 PetriNetUnfolderBase]: 6390/10557 cut-off events. [2024-11-08 18:25:01,356 INFO L125 PetriNetUnfolderBase]: For 87871/87907 co-relation queries the response was YES. [2024-11-08 18:25:01,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55633 conditions, 10557 events. 6390/10557 cut-off events. For 87871/87907 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 60031 event pairs, 2449 based on Foata normal form. 13/10570 useless extension candidates. Maximal degree in co-relation 55456. Up to 8353 conditions per place. [2024-11-08 18:25:01,550 INFO L140 encePairwiseOnDemand]: 36/54 looper letters, 223 selfloop transitions, 51 changer transitions 10/297 dead transitions. [2024-11-08 18:25:01,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 297 transitions, 3657 flow [2024-11-08 18:25:01,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-08 18:25:01,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-08 18:25:01,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 570 transitions. [2024-11-08 18:25:01,552 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-11-08 18:25:01,552 INFO L175 Difference]: Start difference. First operand has 190 places, 175 transitions, 2000 flow. Second operand 19 states and 570 transitions. [2024-11-08 18:25:01,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 297 transitions, 3657 flow [2024-11-08 18:25:01,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 297 transitions, 3452 flow, removed 83 selfloop flow, removed 7 redundant places. [2024-11-08 18:25:01,823 INFO L231 Difference]: Finished difference. Result has 209 places, 200 transitions, 2356 flow [2024-11-08 18:25:01,823 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1843, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2356, PETRI_PLACES=209, PETRI_TRANSITIONS=200} [2024-11-08 18:25:01,824 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 159 predicate places. [2024-11-08 18:25:01,824 INFO L471 AbstractCegarLoop]: Abstraction has has 209 places, 200 transitions, 2356 flow [2024-11-08 18:25:01,825 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 24.27027027027027) internal successors, (898), 37 states have internal predecessors, (898), 0 states have call successors, (0), 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 18:25:01,825 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:25:01,825 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 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, 1] [2024-11-08 18:25:01,839 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-08 18:25:02,025 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:25:02,026 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-08 18:25:02,026 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:25:02,026 INFO L85 PathProgramCache]: Analyzing trace with hash -475969860, now seen corresponding path program 6 times [2024-11-08 18:25:02,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:25:02,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67087794] [2024-11-08 18:25:02,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:25:02,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:25:02,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:25:03,429 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 18:25:03,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:25:03,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67087794] [2024-11-08 18:25:03,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67087794] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:25:03,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292423850] [2024-11-08 18:25:03,430 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 18:25:03,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:25:03,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:25:03,432 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:25:03,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-08 18:25:03,619 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-08 18:25:03,619 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:25:03,621 INFO L255 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-08 18:25:03,624 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:25:04,138 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 18:25:04,138 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 27 treesize of output 19 [2024-11-08 18:25:04,389 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 18:25:04,389 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:25:05,426 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-11-08 18:25:05,426 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 50 treesize of output 50 [2024-11-08 18:25:05,525 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 18:25:05,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292423850] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:25:05,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:25:05,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 36 [2024-11-08 18:25:05,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690993347] [2024-11-08 18:25:05,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:25:05,526 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-08 18:25:05,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:25:05,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-08 18:25:05,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1122, Unknown=0, NotChecked=0, Total=1260 [2024-11-08 18:25:07,705 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 54 [2024-11-08 18:25:07,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 200 transitions, 2356 flow. Second operand has 36 states, 36 states have (on average 24.25) internal successors, (873), 36 states have internal predecessors, (873), 0 states have call successors, (0), 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 18:25:07,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:25:07,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 54 [2024-11-08 18:25:07,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:25:17,319 INFO L124 PetriNetUnfolderBase]: 14783/24891 cut-off events. [2024-11-08 18:25:17,319 INFO L125 PetriNetUnfolderBase]: For 259167/259600 co-relation queries the response was YES. [2024-11-08 18:25:17,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139537 conditions, 24891 events. 14783/24891 cut-off events. For 259167/259600 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 170151 event pairs, 2543 based on Foata normal form. 238/25129 useless extension candidates. Maximal degree in co-relation 139353. Up to 8958 conditions per place. [2024-11-08 18:25:17,846 INFO L140 encePairwiseOnDemand]: 34/54 looper letters, 314 selfloop transitions, 260 changer transitions 67/654 dead transitions. [2024-11-08 18:25:17,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 654 transitions, 8944 flow [2024-11-08 18:25:17,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-08 18:25:17,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-11-08 18:25:17,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 902 transitions. [2024-11-08 18:25:17,849 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5759897828863346 [2024-11-08 18:25:17,849 INFO L175 Difference]: Start difference. First operand has 209 places, 200 transitions, 2356 flow. Second operand 29 states and 902 transitions. [2024-11-08 18:25:17,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 654 transitions, 8944 flow [2024-11-08 18:25:20,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 654 transitions, 8435 flow, removed 215 selfloop flow, removed 8 redundant places. [2024-11-08 18:25:20,033 INFO L231 Difference]: Finished difference. Result has 242 places, 426 transitions, 6285 flow [2024-11-08 18:25:20,033 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2139, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=6285, PETRI_PLACES=242, PETRI_TRANSITIONS=426} [2024-11-08 18:25:20,034 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 192 predicate places. [2024-11-08 18:25:20,034 INFO L471 AbstractCegarLoop]: Abstraction has has 242 places, 426 transitions, 6285 flow [2024-11-08 18:25:20,034 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 24.25) internal successors, (873), 36 states have internal predecessors, (873), 0 states have call successors, (0), 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 18:25:20,034 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:25:20,035 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 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, 1] [2024-11-08 18:25:20,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-08 18:25:20,235 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:25:20,235 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-08 18:25:20,236 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:25:20,236 INFO L85 PathProgramCache]: Analyzing trace with hash -218141242, now seen corresponding path program 7 times [2024-11-08 18:25:20,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:25:20,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108778668] [2024-11-08 18:25:20,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:25:20,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:25:20,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:25:23,030 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-08 18:25:23,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:25:23,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108778668] [2024-11-08 18:25:23,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108778668] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:25:23,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648689722] [2024-11-08 18:25:23,030 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-08 18:25:23,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:25:23,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:25:23,033 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:25:23,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-08 18:25:23,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:25:23,198 INFO L255 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-08 18:25:23,200 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:25:23,496 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 18:25:23,496 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 27 treesize of output 23 [2024-11-08 18:25:23,666 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 18:25:23,666 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:26:09,366 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-11-08 18:26:09,366 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 50 treesize of output 50 [2024-11-08 18:26:09,412 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 18:26:09,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648689722] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:26:09,413 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:26:09,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12, 12] total 43 [2024-11-08 18:26:09,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187959834] [2024-11-08 18:26:09,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:26:09,413 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-08 18:26:09,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:26:09,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-08 18:26:09,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1631, Unknown=9, NotChecked=0, Total=1806 [2024-11-08 18:26:13,751 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:26:19,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:26:23,432 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:26:27,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:26:31,967 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:26:36,994 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:26:41,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:26:45,792 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:26:50,255 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:26:54,427 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:26:58,696 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:26:58,696 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 54 [2024-11-08 18:26:58,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 426 transitions, 6285 flow. Second operand has 43 states, 43 states have (on average 5.1395348837209305) internal successors, (221), 43 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:26:58,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:26:58,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 54 [2024-11-08 18:26:58,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:27:10,445 INFO L124 PetriNetUnfolderBase]: 15074/24998 cut-off events. [2024-11-08 18:27:10,445 INFO L125 PetriNetUnfolderBase]: For 424428/424428 co-relation queries the response was YES. [2024-11-08 18:27:10,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171048 conditions, 24998 events. 15074/24998 cut-off events. For 424428/424428 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 166531 event pairs, 4225 based on Foata normal form. 12/25010 useless extension candidates. Maximal degree in co-relation 170841. Up to 20753 conditions per place. [2024-11-08 18:27:10,839 INFO L140 encePairwiseOnDemand]: 35/54 looper letters, 415 selfloop transitions, 97 changer transitions 29/542 dead transitions. [2024-11-08 18:27:10,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 542 transitions, 8730 flow [2024-11-08 18:27:10,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-08 18:27:10,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-08 18:27:10,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 217 transitions. [2024-11-08 18:27:10,842 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.21150097465886938 [2024-11-08 18:27:10,842 INFO L175 Difference]: Start difference. First operand has 242 places, 426 transitions, 6285 flow. Second operand 19 states and 217 transitions. [2024-11-08 18:27:10,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 542 transitions, 8730 flow [2024-11-08 18:27:15,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 542 transitions, 8067 flow, removed 316 selfloop flow, removed 10 redundant places. [2024-11-08 18:27:15,254 INFO L231 Difference]: Finished difference. Result has 249 places, 434 transitions, 6176 flow [2024-11-08 18:27:15,254 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=5732, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=6176, PETRI_PLACES=249, PETRI_TRANSITIONS=434} [2024-11-08 18:27:15,255 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 199 predicate places. [2024-11-08 18:27:15,255 INFO L471 AbstractCegarLoop]: Abstraction has has 249 places, 434 transitions, 6176 flow [2024-11-08 18:27:15,255 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 5.1395348837209305) internal successors, (221), 43 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:27:15,255 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:27:15,255 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 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, 1] [2024-11-08 18:27:15,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-08 18:27:15,456 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-08 18:27:15,456 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-08 18:27:15,456 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:27:15,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1955105034, now seen corresponding path program 8 times [2024-11-08 18:27:15,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:27:15,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56676922] [2024-11-08 18:27:15,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:27:15,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:27:15,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:27:16,639 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 18:27:16,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:27:16,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56676922] [2024-11-08 18:27:16,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56676922] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:27:16,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145827251] [2024-11-08 18:27:16,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 18:27:16,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:27:16,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:27:16,643 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:27:16,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-08 18:27:16,838 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 18:27:16,838 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:27:16,841 INFO L255 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-08 18:27:16,843 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:27:17,405 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 18:27:17,406 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 27 treesize of output 19 [2024-11-08 18:27:17,455 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 18:27:17,455 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:27:18,764 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-11-08 18:27:18,765 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 42 treesize of output 50 [2024-11-08 18:27:18,852 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 18:27:18,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145827251] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:27:18,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:27:18,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 32 [2024-11-08 18:27:18,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276828389] [2024-11-08 18:27:18,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:27:18,853 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-08 18:27:18,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:27:18,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-08 18:27:18,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2024-11-08 18:27:21,621 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 54 [2024-11-08 18:27:21,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 434 transitions, 6176 flow. Second operand has 32 states, 32 states have (on average 24.40625) internal successors, (781), 32 states have internal predecessors, (781), 0 states have call successors, (0), 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 18:27:21,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:27:21,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 54 [2024-11-08 18:27:21,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:27:31,437 INFO L124 PetriNetUnfolderBase]: 13651/23192 cut-off events. [2024-11-08 18:27:31,437 INFO L125 PetriNetUnfolderBase]: For 355461/355908 co-relation queries the response was YES. [2024-11-08 18:27:31,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153078 conditions, 23192 events. 13651/23192 cut-off events. For 355461/355908 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 158630 event pairs, 3650 based on Foata normal form. 2/23194 useless extension candidates. Maximal degree in co-relation 152878. Up to 19116 conditions per place. [2024-11-08 18:27:31,839 INFO L140 encePairwiseOnDemand]: 38/54 looper letters, 415 selfloop transitions, 75 changer transitions 15/518 dead transitions. [2024-11-08 18:27:31,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 518 transitions, 8217 flow [2024-11-08 18:27:31,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-08 18:27:31,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-08 18:27:31,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 504 transitions. [2024-11-08 18:27:31,844 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5490196078431373 [2024-11-08 18:27:31,844 INFO L175 Difference]: Start difference. First operand has 249 places, 434 transitions, 6176 flow. Second operand 17 states and 504 transitions. [2024-11-08 18:27:31,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 518 transitions, 8217 flow [2024-11-08 18:27:34,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 518 transitions, 7956 flow, removed 48 selfloop flow, removed 16 redundant places. [2024-11-08 18:27:34,193 INFO L231 Difference]: Finished difference. Result has 252 places, 442 transitions, 6365 flow [2024-11-08 18:27:34,194 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=5967, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=6365, PETRI_PLACES=252, PETRI_TRANSITIONS=442} [2024-11-08 18:27:34,195 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 202 predicate places. [2024-11-08 18:27:34,195 INFO L471 AbstractCegarLoop]: Abstraction has has 252 places, 442 transitions, 6365 flow [2024-11-08 18:27:34,195 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 24.40625) internal successors, (781), 32 states have internal predecessors, (781), 0 states have call successors, (0), 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 18:27:34,195 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:27:34,195 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 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, 1] [2024-11-08 18:27:34,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-08 18:27:34,396 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-08 18:27:34,396 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-08 18:27:34,396 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:27:34,397 INFO L85 PathProgramCache]: Analyzing trace with hash -465700038, now seen corresponding path program 9 times [2024-11-08 18:27:34,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:27:34,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070798450] [2024-11-08 18:27:34,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:27:34,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:27:34,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:27:35,932 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 18:27:35,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:27:35,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070798450] [2024-11-08 18:27:35,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070798450] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:27:35,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687510026] [2024-11-08 18:27:35,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 18:27:35,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:27:35,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:27:35,936 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:27:35,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-08 18:27:36,132 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-08 18:27:36,132 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:27:36,138 INFO L255 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-08 18:27:36,141 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:27:36,675 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 18:27:36,675 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 27 treesize of output 19 [2024-11-08 18:27:36,858 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 18:27:36,858 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:27:38,741 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-11-08 18:27:38,742 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 42 treesize of output 50 [2024-11-08 18:27:38,846 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 18:27:38,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687510026] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:27:38,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:27:38,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 37 [2024-11-08 18:27:38,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803818189] [2024-11-08 18:27:38,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:27:38,847 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-08 18:27:38,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:27:38,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-08 18:27:38,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1186, Unknown=0, NotChecked=0, Total=1332 [2024-11-08 18:27:42,781 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 54 [2024-11-08 18:27:42,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 442 transitions, 6365 flow. Second operand has 37 states, 37 states have (on average 24.27027027027027) internal successors, (898), 37 states have internal predecessors, (898), 0 states have call successors, (0), 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 18:27:42,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:27:42,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 54 [2024-11-08 18:27:42,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:27:53,151 INFO L124 PetriNetUnfolderBase]: 13618/23123 cut-off events. [2024-11-08 18:27:53,151 INFO L125 PetriNetUnfolderBase]: For 393761/394208 co-relation queries the response was YES. [2024-11-08 18:27:53,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155075 conditions, 23123 events. 13618/23123 cut-off events. For 393761/394208 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 158068 event pairs, 3657 based on Foata normal form. 3/23126 useless extension candidates. Maximal degree in co-relation 154877. Up to 19098 conditions per place. [2024-11-08 18:27:53,883 INFO L140 encePairwiseOnDemand]: 39/54 looper letters, 407 selfloop transitions, 66 changer transitions 12/498 dead transitions. [2024-11-08 18:27:53,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 498 transitions, 7962 flow [2024-11-08 18:27:53,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-08 18:27:53,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-08 18:27:53,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 438 transitions. [2024-11-08 18:27:53,885 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5407407407407407 [2024-11-08 18:27:53,885 INFO L175 Difference]: Start difference. First operand has 252 places, 442 transitions, 6365 flow. Second operand 15 states and 438 transitions. [2024-11-08 18:27:53,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 498 transitions, 7962 flow [2024-11-08 18:27:57,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 498 transitions, 7726 flow, removed 59 selfloop flow, removed 11 redundant places. [2024-11-08 18:27:57,226 INFO L231 Difference]: Finished difference. Result has 255 places, 436 transitions, 6203 flow [2024-11-08 18:27:57,226 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=6129, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=6203, PETRI_PLACES=255, PETRI_TRANSITIONS=436} [2024-11-08 18:27:57,226 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 205 predicate places. [2024-11-08 18:27:57,227 INFO L471 AbstractCegarLoop]: Abstraction has has 255 places, 436 transitions, 6203 flow [2024-11-08 18:27:57,227 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 24.27027027027027) internal successors, (898), 37 states have internal predecessors, (898), 0 states have call successors, (0), 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 18:27:57,227 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:27:57,227 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 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, 1] [2024-11-08 18:27:57,241 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-08 18:27:57,428 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:27:57,428 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-08 18:27:57,428 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:27:57,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1667624984, now seen corresponding path program 10 times [2024-11-08 18:27:57,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:27:57,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493538570] [2024-11-08 18:27:57,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:27:57,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:27:57,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:27:58,925 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 18:27:58,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:27:58,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493538570] [2024-11-08 18:27:58,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493538570] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:27:58,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770025723] [2024-11-08 18:27:58,926 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 18:27:58,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:27:58,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:27:58,929 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:27:58,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-08 18:27:59,176 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 18:27:59,176 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:27:59,179 INFO L255 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-08 18:27:59,181 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:27:59,648 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 18:27:59,648 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 27 treesize of output 23 [2024-11-08 18:27:59,829 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 18:27:59,829 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:28:13,282 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-11-08 18:28:13,283 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 40 treesize of output 56 [2024-11-08 18:28:13,313 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-11-08 18:28:13,313 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 58 treesize of output 1 [2024-11-08 18:28:13,326 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2024-11-08 18:28:13,327 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 19 treesize of output 11 [2024-11-08 18:28:13,340 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-11-08 18:28:13,340 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 58 treesize of output 1 [2024-11-08 18:28:13,350 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-11-08 18:28:13,351 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 40 treesize of output 1 [2024-11-08 18:28:13,353 WARN L214 Elim1Store]: Array PQE input equivalent to true [2024-11-08 18:28:13,365 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-11-08 18:28:13,365 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 58 treesize of output 1 [2024-11-08 18:28:13,377 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-11-08 18:28:13,377 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 58 treesize of output 1 [2024-11-08 18:28:13,485 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 18:28:13,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770025723] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:28:13,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:28:13,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12] total 37 [2024-11-08 18:28:13,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069062163] [2024-11-08 18:28:13,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:28:13,486 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-08 18:28:13,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:28:13,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-08 18:28:13,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1209, Unknown=3, NotChecked=0, Total=1332 [2024-11-08 18:28:17,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:28:21,537 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:28:25,564 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:28:29,575 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:28:33,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:28:37,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:28:41,636 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:28:45,647 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:28:49,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:28:53,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:28:57,795 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:29:01,820 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:29:05,846 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:29:09,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:29:13,876 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:29:17,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:29:21,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:29:25,907 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:29:29,914 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 18:29:29,914 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-11-08 18:29:29,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 436 transitions, 6203 flow. Second operand has 37 states, 37 states have (on average 14.27027027027027) internal successors, (528), 37 states have internal predecessors, (528), 0 states have call successors, (0), 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 18:29:29,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:29:29,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-11-08 18:29:29,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:29:41,439 INFO L124 PetriNetUnfolderBase]: 15096/25077 cut-off events. [2024-11-08 18:29:41,439 INFO L125 PetriNetUnfolderBase]: For 430367/430367 co-relation queries the response was YES. [2024-11-08 18:29:41,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167682 conditions, 25077 events. 15096/25077 cut-off events. For 430367/430367 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 167546 event pairs, 4386 based on Foata normal form. 4/25081 useless extension candidates. Maximal degree in co-relation 167484. Up to 20774 conditions per place. [2024-11-08 18:29:41,884 INFO L140 encePairwiseOnDemand]: 35/54 looper letters, 426 selfloop transitions, 96 changer transitions 20/551 dead transitions. [2024-11-08 18:29:41,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 551 transitions, 8578 flow [2024-11-08 18:29:41,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-08 18:29:41,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-08 18:29:41,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 381 transitions. [2024-11-08 18:29:41,886 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3713450292397661 [2024-11-08 18:29:41,886 INFO L175 Difference]: Start difference. First operand has 255 places, 436 transitions, 6203 flow. Second operand 19 states and 381 transitions. [2024-11-08 18:29:41,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 551 transitions, 8578 flow [2024-11-08 18:29:45,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 551 transitions, 8420 flow, removed 9 selfloop flow, removed 15 redundant places. [2024-11-08 18:29:45,119 INFO L231 Difference]: Finished difference. Result has 259 places, 452 transitions, 6631 flow [2024-11-08 18:29:45,119 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=6051, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=6631, PETRI_PLACES=259, PETRI_TRANSITIONS=452} [2024-11-08 18:29:45,120 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 209 predicate places. [2024-11-08 18:29:45,120 INFO L471 AbstractCegarLoop]: Abstraction has has 259 places, 452 transitions, 6631 flow [2024-11-08 18:29:45,120 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 14.27027027027027) internal successors, (528), 37 states have internal predecessors, (528), 0 states have call successors, (0), 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 18:29:45,120 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:29:45,120 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 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, 1] [2024-11-08 18:29:45,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-08 18:29:45,321 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-11-08 18:29:45,321 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-08 18:29:45,321 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:29:45,321 INFO L85 PathProgramCache]: Analyzing trace with hash -22790256, now seen corresponding path program 11 times [2024-11-08 18:29:45,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:29:45,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204870810] [2024-11-08 18:29:45,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:29:45,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:29:45,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:29:46,690 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 18:29:46,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:29:46,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204870810] [2024-11-08 18:29:46,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204870810] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:29:46,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678612631] [2024-11-08 18:29:46,692 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 18:29:46,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:29:46,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:29:46,695 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:29:46,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a98ef4a5-78d8-4281-8170-fc5ec0c26906/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-08 18:29:46,970 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-08 18:29:46,970 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:29:46,972 INFO L255 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-08 18:29:46,974 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:29:47,499 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 18:29:47,500 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 27 treesize of output 19 [2024-11-08 18:29:47,703 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 18:29:47,704 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:29:48,864 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-11-08 18:29:48,865 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 40 treesize of output 56 [2024-11-08 18:29:48,890 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2024-11-08 18:29:48,890 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 19 treesize of output 11 [2024-11-08 18:29:48,905 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-11-08 18:29:48,906 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 58 treesize of output 1 [2024-11-08 18:29:48,917 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-11-08 18:29:48,917 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 58 treesize of output 1 [2024-11-08 18:29:48,928 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-11-08 18:29:48,928 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 40 treesize of output 1 [2024-11-08 18:29:48,942 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-11-08 18:29:48,942 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 58 treesize of output 1 [2024-11-08 18:29:48,953 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-11-08 18:29:48,953 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 58 treesize of output 1 [2024-11-08 18:29:49,049 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-08 18:29:49,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678612631] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:29:49,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:29:49,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 38 [2024-11-08 18:29:49,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923996134] [2024-11-08 18:29:49,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:29:49,050 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-08 18:29:49,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:29:49,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-08 18:29:49,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1239, Unknown=0, NotChecked=0, Total=1406 [2024-11-08 18:29:51,833 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 54 [2024-11-08 18:29:51,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 452 transitions, 6631 flow. Second operand has 38 states, 38 states have (on average 24.210526315789473) internal successors, (920), 38 states have internal predecessors, (920), 0 states have call successors, (0), 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 18:29:51,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:29:51,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 54 [2024-11-08 18:29:51,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand