./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-array-sum.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-array-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB --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 e4a4a131c0d4df2db1bf018027395318bc112945cbb20d5c862562c48934e5a1 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 03:16:15,507 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 03:16:15,611 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-28 03:16:15,618 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 03:16:15,620 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 03:16:15,656 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 03:16:15,658 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 03:16:15,658 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 03:16:15,659 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 03:16:15,659 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 03:16:15,659 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 03:16:15,660 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 03:16:15,660 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 03:16:15,660 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 03:16:15,661 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 03:16:15,662 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 03:16:15,662 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 03:16:15,662 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 03:16:15,662 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 03:16:15,662 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 03:16:15,663 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-28 03:16:15,663 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-28 03:16:15,663 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-28 03:16:15,663 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 03:16:15,663 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 03:16:15,663 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-28 03:16:15,663 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 03:16:15,663 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 03:16:15,664 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 03:16:15,664 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 03:16:15,664 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:16:15,664 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:16:15,664 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:16:15,665 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:16:15,665 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 03:16:15,665 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:16:15,666 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:16:15,666 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:16:15,666 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:16:15,666 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 03:16:15,666 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 03:16:15,666 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 03:16:15,666 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 03:16:15,666 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 03:16:15,666 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 03:16:15,666 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 03:16:15,666 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 03:16:15,667 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB 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 -> e4a4a131c0d4df2db1bf018027395318bc112945cbb20d5c862562c48934e5a1 [2024-11-28 03:16:16,016 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 03:16:16,027 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 03:16:16,030 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 03:16:16,033 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 03:16:16,033 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 03:16:16,035 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/popl20-more-array-sum.wvr.c [2024-11-28 03:16:19,003 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/data/4bd5ae8cc/887d0de885d5485dbb2037fc524cf31b/FLAG75897829a [2024-11-28 03:16:19,339 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 03:16:19,341 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/sv-benchmarks/c/weaver/popl20-more-array-sum.wvr.c [2024-11-28 03:16:19,353 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/data/4bd5ae8cc/887d0de885d5485dbb2037fc524cf31b/FLAG75897829a [2024-11-28 03:16:19,374 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/data/4bd5ae8cc/887d0de885d5485dbb2037fc524cf31b [2024-11-28 03:16:19,376 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 03:16:19,377 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 03:16:19,379 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 03:16:19,379 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 03:16:19,384 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 03:16:19,385 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:16:19" (1/1) ... [2024-11-28 03:16:19,388 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@231fb651 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:16:19, skipping insertion in model container [2024-11-28 03:16:19,388 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:16:19" (1/1) ... [2024-11-28 03:16:19,414 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 03:16:19,633 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-28 03:16:19,641 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:16:19,651 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 03:16:19,675 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:16:19,694 INFO L204 MainTranslator]: Completed translation [2024-11-28 03:16:19,695 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:16:19 WrapperNode [2024-11-28 03:16:19,695 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 03:16:19,696 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 03:16:19,696 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 03:16:19,696 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 03:16:19,703 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:16:19" (1/1) ... [2024-11-28 03:16:19,712 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:16:19" (1/1) ... [2024-11-28 03:16:19,765 INFO L138 Inliner]: procedures = 22, calls = 32, calls flagged for inlining = 17, calls inlined = 29, statements flattened = 261 [2024-11-28 03:16:19,766 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 03:16:19,766 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 03:16:19,766 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 03:16:19,766 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 03:16:19,783 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:16:19" (1/1) ... [2024-11-28 03:16:19,784 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:16:19" (1/1) ... [2024-11-28 03:16:19,788 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:16:19" (1/1) ... [2024-11-28 03:16:19,817 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 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]. [2024-11-28 03:16:19,817 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:16:19" (1/1) ... [2024-11-28 03:16:19,817 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:16:19" (1/1) ... [2024-11-28 03:16:19,829 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:16:19" (1/1) ... [2024-11-28 03:16:19,835 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:16:19" (1/1) ... [2024-11-28 03:16:19,843 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:16:19" (1/1) ... [2024-11-28 03:16:19,844 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:16:19" (1/1) ... [2024-11-28 03:16:19,849 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:16:19" (1/1) ... [2024-11-28 03:16:19,852 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 03:16:19,857 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 03:16:19,857 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 03:16:19,857 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 03:16:19,858 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:16:19" (1/1) ... [2024-11-28 03:16:19,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:16:19,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:16:19,898 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 03:16:19,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 03:16:19,922 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 03:16:19,922 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-28 03:16:19,923 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-28 03:16:19,923 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-28 03:16:19,923 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-28 03:16:19,923 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-28 03:16:19,923 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-28 03:16:19,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 03:16:19,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-28 03:16:19,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 03:16:19,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 03:16:19,924 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-28 03:16:19,924 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 03:16:19,924 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 03:16:19,924 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 03:16:19,924 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 03:16:19,926 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-28 03:16:20,045 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 03:16:20,047 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 03:16:20,634 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-28 03:16:20,635 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 03:16:21,168 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 03:16:21,168 INFO L312 CfgBuilder]: Removed 5 assume(true) statements. [2024-11-28 03:16:21,169 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:16:21 BoogieIcfgContainer [2024-11-28 03:16:21,170 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 03:16:21,172 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 03:16:21,173 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 03:16:21,179 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 03:16:21,179 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:16:19" (1/3) ... [2024-11-28 03:16:21,180 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2928b401 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:16:21, skipping insertion in model container [2024-11-28 03:16:21,180 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:16:19" (2/3) ... [2024-11-28 03:16:21,180 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2928b401 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:16:21, skipping insertion in model container [2024-11-28 03:16:21,180 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:16:21" (3/3) ... [2024-11-28 03:16:21,181 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum.wvr.c [2024-11-28 03:16:21,198 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 03:16:21,199 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-array-sum.wvr.c that has 4 procedures, 55 locations, 1 initial locations, 5 loop locations, and 18 error locations. [2024-11-28 03:16:21,200 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-28 03:16:21,303 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-28 03:16:21,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 59 transitions, 139 flow [2024-11-28 03:16:21,400 INFO L124 PetriNetUnfolderBase]: 5/56 cut-off events. [2024-11-28 03:16:21,404 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-28 03:16:21,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 56 events. 5/56 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 139 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 40. Up to 2 conditions per place. [2024-11-28 03:16:21,409 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 59 transitions, 139 flow [2024-11-28 03:16:21,414 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 55 transitions, 128 flow [2024-11-28 03:16:21,425 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 03:16:21,445 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;@67d8f4bf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 03:16:21,445 INFO L334 AbstractCegarLoop]: Starting to check reachability of 33 error locations. [2024-11-28 03:16:21,451 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 03:16:21,453 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-28 03:16:21,453 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-28 03:16:21,453 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:16:21,454 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-28 03:16:21,455 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 03:16:21,461 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:16:21,461 INFO L85 PathProgramCache]: Analyzing trace with hash 883659, now seen corresponding path program 1 times [2024-11-28 03:16:21,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:16:21,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089302128] [2024-11-28 03:16:21,470 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:16:21,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:16:21,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:16:21,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:16:21,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:16:21,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089302128] [2024-11-28 03:16:21,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089302128] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:16:21,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:16:21,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-28 03:16:21,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030433849] [2024-11-28 03:16:21,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:16:21,778 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 03:16:21,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:16:21,809 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 03:16:21,809 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:16:21,866 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 59 [2024-11-28 03:16:21,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 55 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:16:21,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:16:21,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 59 [2024-11-28 03:16:21,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:16:22,209 INFO L124 PetriNetUnfolderBase]: 333/711 cut-off events. [2024-11-28 03:16:22,210 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2024-11-28 03:16:22,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1255 conditions, 711 events. 333/711 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3934 event pairs, 226 based on Foata normal form. 1/591 useless extension candidates. Maximal degree in co-relation 1092. Up to 481 conditions per place. [2024-11-28 03:16:22,226 INFO L140 encePairwiseOnDemand]: 54/59 looper letters, 26 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2024-11-28 03:16:22,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 51 transitions, 176 flow [2024-11-28 03:16:22,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 03:16:22,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 03:16:22,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 112 transitions. [2024-11-28 03:16:22,243 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.632768361581921 [2024-11-28 03:16:22,245 INFO L175 Difference]: Start difference. First operand has 60 places, 55 transitions, 128 flow. Second operand 3 states and 112 transitions. [2024-11-28 03:16:22,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 51 transitions, 176 flow [2024-11-28 03:16:22,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 51 transitions, 164 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-28 03:16:22,259 INFO L231 Difference]: Finished difference. Result has 52 places, 51 transitions, 112 flow [2024-11-28 03:16:22,262 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=52, PETRI_TRANSITIONS=51} [2024-11-28 03:16:22,267 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, -8 predicate places. [2024-11-28 03:16:22,268 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 51 transitions, 112 flow [2024-11-28 03:16:22,268 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:16:22,269 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:16:22,269 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-28 03:16:22,269 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 03:16:22,269 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 03:16:22,270 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:16:22,271 INFO L85 PathProgramCache]: Analyzing trace with hash 883660, now seen corresponding path program 1 times [2024-11-28 03:16:22,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:16:22,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707795849] [2024-11-28 03:16:22,271 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:16:22,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:16:22,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:16:22,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:16:22,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:16:22,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707795849] [2024-11-28 03:16:22,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707795849] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:16:22,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:16:22,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:16:22,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924486441] [2024-11-28 03:16:22,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:16:22,679 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:16:22,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:16:22,680 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:16:22,680 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:16:22,728 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 59 [2024-11-28 03:16:22,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 51 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:16:22,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:16:22,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 59 [2024-11-28 03:16:22,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:16:23,008 INFO L124 PetriNetUnfolderBase]: 333/710 cut-off events. [2024-11-28 03:16:23,009 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-11-28 03:16:23,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1218 conditions, 710 events. 333/710 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3921 event pairs, 226 based on Foata normal form. 0/589 useless extension candidates. Maximal degree in co-relation 1197. Up to 485 conditions per place. [2024-11-28 03:16:23,020 INFO L140 encePairwiseOnDemand]: 54/59 looper letters, 25 selfloop transitions, 4 changer transitions 0/50 dead transitions. [2024-11-28 03:16:23,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 50 transitions, 168 flow [2024-11-28 03:16:23,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:16:23,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:16:23,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 138 transitions. [2024-11-28 03:16:23,025 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5847457627118644 [2024-11-28 03:16:23,026 INFO L175 Difference]: Start difference. First operand has 52 places, 51 transitions, 112 flow. Second operand 4 states and 138 transitions. [2024-11-28 03:16:23,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 50 transitions, 168 flow [2024-11-28 03:16:23,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 50 transitions, 164 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 03:16:23,028 INFO L231 Difference]: Finished difference. Result has 52 places, 50 transitions, 114 flow [2024-11-28 03:16:23,029 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=114, PETRI_PLACES=52, PETRI_TRANSITIONS=50} [2024-11-28 03:16:23,030 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, -8 predicate places. [2024-11-28 03:16:23,030 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 50 transitions, 114 flow [2024-11-28 03:16:23,030 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:16:23,030 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:16:23,030 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-28 03:16:23,030 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 03:16:23,031 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 03:16:23,032 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:16:23,033 INFO L85 PathProgramCache]: Analyzing trace with hash 27396059, now seen corresponding path program 1 times [2024-11-28 03:16:23,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:16:23,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978610826] [2024-11-28 03:16:23,033 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:16:23,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:16:23,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:16:23,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:16:23,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:16:23,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978610826] [2024-11-28 03:16:23,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978610826] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:16:23,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:16:23,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 03:16:23,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605245917] [2024-11-28 03:16:23,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:16:23,246 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:16:23,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:16:23,247 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:16:23,247 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:16:23,263 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 59 [2024-11-28 03:16:23,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 50 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:16:23,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:16:23,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 59 [2024-11-28 03:16:23,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:16:23,555 INFO L124 PetriNetUnfolderBase]: 333/716 cut-off events. [2024-11-28 03:16:23,555 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-11-28 03:16:23,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1233 conditions, 716 events. 333/716 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3932 event pairs, 226 based on Foata normal form. 1/595 useless extension candidates. Maximal degree in co-relation 1209. Up to 487 conditions per place. [2024-11-28 03:16:23,563 INFO L140 encePairwiseOnDemand]: 53/59 looper letters, 28 selfloop transitions, 4 changer transitions 1/55 dead transitions. [2024-11-28 03:16:23,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 55 transitions, 196 flow [2024-11-28 03:16:23,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:16:23,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:16:23,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 152 transitions. [2024-11-28 03:16:23,569 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6440677966101694 [2024-11-28 03:16:23,569 INFO L175 Difference]: Start difference. First operand has 52 places, 50 transitions, 114 flow. Second operand 4 states and 152 transitions. [2024-11-28 03:16:23,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 55 transitions, 196 flow [2024-11-28 03:16:23,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 55 transitions, 182 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-28 03:16:23,574 INFO L231 Difference]: Finished difference. Result has 54 places, 52 transitions, 132 flow [2024-11-28 03:16:23,575 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=132, PETRI_PLACES=54, PETRI_TRANSITIONS=52} [2024-11-28 03:16:23,576 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, -6 predicate places. [2024-11-28 03:16:23,576 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 52 transitions, 132 flow [2024-11-28 03:16:23,577 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:16:23,577 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:16:23,577 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-28 03:16:23,577 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-28 03:16:23,577 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 03:16:23,578 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:16:23,578 INFO L85 PathProgramCache]: Analyzing trace with hash 556223144, now seen corresponding path program 1 times [2024-11-28 03:16:23,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:16:23,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076550628] [2024-11-28 03:16:23,579 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:16:23,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:16:23,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:16:23,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:16:23,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:16:23,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076550628] [2024-11-28 03:16:23,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076550628] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:16:23,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498490914] [2024-11-28 03:16:23,992 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:16:23,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:16:23,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:16:23,996 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:16:23,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 03:16:24,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:16:24,083 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-28 03:16:24,087 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:16:24,157 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 [2024-11-28 03:16:24,344 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-28 03:16:24,345 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 32 treesize of output 27 [2024-11-28 03:16:24,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:16:24,386 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:16:24,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:16:24,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498490914] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 03:16:24,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:16:24,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 3] total 10 [2024-11-28 03:16:24,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972091367] [2024-11-28 03:16:24,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:16:24,507 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:16:24,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:16:24,508 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:16:24,508 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-28 03:16:24,601 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 59 [2024-11-28 03:16:24,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 52 transitions, 132 flow. Second operand has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:16:24,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:16:24,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 59 [2024-11-28 03:16:24,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:16:24,829 INFO L124 PetriNetUnfolderBase]: 333/714 cut-off events. [2024-11-28 03:16:24,829 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-11-28 03:16:24,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1238 conditions, 714 events. 333/714 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3924 event pairs, 226 based on Foata normal form. 1/596 useless extension candidates. Maximal degree in co-relation 1209. Up to 487 conditions per place. [2024-11-28 03:16:24,835 INFO L140 encePairwiseOnDemand]: 54/59 looper letters, 29 selfloop transitions, 4 changer transitions 0/54 dead transitions. [2024-11-28 03:16:24,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 54 transitions, 204 flow [2024-11-28 03:16:24,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:16:24,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 03:16:24,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 169 transitions. [2024-11-28 03:16:24,837 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5728813559322034 [2024-11-28 03:16:24,837 INFO L175 Difference]: Start difference. First operand has 54 places, 52 transitions, 132 flow. Second operand 5 states and 169 transitions. [2024-11-28 03:16:24,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 54 transitions, 204 flow [2024-11-28 03:16:24,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 54 transitions, 194 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-11-28 03:16:24,839 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 136 flow [2024-11-28 03:16:24,840 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=136, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2024-11-28 03:16:24,840 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, -4 predicate places. [2024-11-28 03:16:24,840 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 136 flow [2024-11-28 03:16:24,841 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:16:24,841 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:16:24,841 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-11-28 03:16:24,851 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 03:16:25,043 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:16:25,043 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 03:16:25,044 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:16:25,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1954526342, now seen corresponding path program 1 times [2024-11-28 03:16:25,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:16:25,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396093653] [2024-11-28 03:16:25,044 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:16:25,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:16:25,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:16:25,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:16:25,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:16:25,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396093653] [2024-11-28 03:16:25,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396093653] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:16:25,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046731497] [2024-11-28 03:16:25,242 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:16:25,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:16:25,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:16:25,244 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:16:25,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 03:16:25,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:16:25,333 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 03:16:25,334 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:16:25,435 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:16:25,435 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:16:25,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:16:25,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046731497] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:16:25,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:16:25,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-28 03:16:25,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313823409] [2024-11-28 03:16:25,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:16:25,525 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 03:16:25,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:16:25,526 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 03:16:25,527 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-11-28 03:16:25,631 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 59 [2024-11-28 03:16:25,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 136 flow. Second operand has 13 states, 13 states have (on average 30.53846153846154) internal successors, (397), 13 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:16:25,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:16:25,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 59 [2024-11-28 03:16:25,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:16:26,092 INFO L124 PetriNetUnfolderBase]: 665/1426 cut-off events. [2024-11-28 03:16:26,092 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-11-28 03:16:26,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2464 conditions, 1426 events. 665/1426 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 8987 event pairs, 452 based on Foata normal form. 1/1204 useless extension candidates. Maximal degree in co-relation 1217. Up to 485 conditions per place. [2024-11-28 03:16:26,103 INFO L140 encePairwiseOnDemand]: 52/59 looper letters, 48 selfloop transitions, 14 changer transitions 0/84 dead transitions. [2024-11-28 03:16:26,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 84 transitions, 348 flow [2024-11-28 03:16:26,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 03:16:26,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-28 03:16:26,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 295 transitions. [2024-11-28 03:16:26,106 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-11-28 03:16:26,106 INFO L175 Difference]: Start difference. First operand has 56 places, 52 transitions, 136 flow. Second operand 8 states and 295 transitions. [2024-11-28 03:16:26,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 84 transitions, 348 flow [2024-11-28 03:16:26,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 84 transitions, 341 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 03:16:26,109 INFO L231 Difference]: Finished difference. Result has 63 places, 60 transitions, 209 flow [2024-11-28 03:16:26,109 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=209, PETRI_PLACES=63, PETRI_TRANSITIONS=60} [2024-11-28 03:16:26,110 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 3 predicate places. [2024-11-28 03:16:26,110 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 60 transitions, 209 flow [2024-11-28 03:16:26,110 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 30.53846153846154) internal successors, (397), 13 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:16:26,110 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:16:26,110 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2024-11-28 03:16:26,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-28 03:16:26,311 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:16:26,311 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 03:16:26,311 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:16:26,311 INFO L85 PathProgramCache]: Analyzing trace with hash -153302829, now seen corresponding path program 2 times [2024-11-28 03:16:26,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:16:26,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503577316] [2024-11-28 03:16:26,312 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:16:26,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:16:26,342 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:16:26,342 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:16:26,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 03:16:26,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:16:26,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503577316] [2024-11-28 03:16:26,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503577316] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:16:26,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269722541] [2024-11-28 03:16:26,588 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:16:26,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:16:26,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:16:26,590 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:16:26,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 03:16:26,681 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:16:26,681 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:16:26,682 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-28 03:16:26,684 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:16:26,694 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 [2024-11-28 03:16:26,859 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-28 03:16:26,859 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 32 treesize of output 27 [2024-11-28 03:16:26,949 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:16:26,950 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:16:27,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:16:27,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269722541] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:16:27,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:16:27,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 14 [2024-11-28 03:16:27,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589715935] [2024-11-28 03:16:27,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:16:27,154 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 03:16:27,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:16:27,155 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 03:16:27,155 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2024-11-28 03:16:28,153 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 59 [2024-11-28 03:16:28,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 60 transitions, 209 flow. Second operand has 16 states, 16 states have (on average 28.75) internal successors, (460), 16 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:16:28,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:16:28,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 59 [2024-11-28 03:16:28,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:16:29,267 INFO L124 PetriNetUnfolderBase]: 995/2126 cut-off events. [2024-11-28 03:16:29,267 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2024-11-28 03:16:29,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3683 conditions, 2126 events. 995/2126 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 14840 event pairs, 678 based on Foata normal form. 2/1795 useless extension candidates. Maximal degree in co-relation 2418. Up to 960 conditions per place. [2024-11-28 03:16:29,287 INFO L140 encePairwiseOnDemand]: 51/59 looper letters, 44 selfloop transitions, 18 changer transitions 0/83 dead transitions. [2024-11-28 03:16:29,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 83 transitions, 393 flow [2024-11-28 03:16:29,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 03:16:29,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-28 03:16:29,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 361 transitions. [2024-11-28 03:16:29,289 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5562403697996918 [2024-11-28 03:16:29,289 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 209 flow. Second operand 11 states and 361 transitions. [2024-11-28 03:16:29,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 83 transitions, 393 flow [2024-11-28 03:16:29,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 83 transitions, 369 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-11-28 03:16:29,292 INFO L231 Difference]: Finished difference. Result has 71 places, 61 transitions, 233 flow [2024-11-28 03:16:29,293 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=233, PETRI_PLACES=71, PETRI_TRANSITIONS=61} [2024-11-28 03:16:29,293 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 11 predicate places. [2024-11-28 03:16:29,294 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 61 transitions, 233 flow [2024-11-28 03:16:29,294 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 28.75) internal successors, (460), 16 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:16:29,294 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:16:29,294 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:16:29,304 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 03:16:29,495 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:16:29,495 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 03:16:29,496 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:16:29,496 INFO L85 PathProgramCache]: Analyzing trace with hash 426616635, now seen corresponding path program 1 times [2024-11-28 03:16:29,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:16:29,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760610791] [2024-11-28 03:16:29,496 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:16:29,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:16:29,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:16:29,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:16:29,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:16:29,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760610791] [2024-11-28 03:16:29,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760610791] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:16:29,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:16:29,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 03:16:29,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782406442] [2024-11-28 03:16:29,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:16:29,651 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:16:29,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:16:29,651 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:16:29,651 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:16:29,710 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 59 [2024-11-28 03:16:29,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 61 transitions, 233 flow. Second operand has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:16:29,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:16:29,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 59 [2024-11-28 03:16:29,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:16:30,177 INFO L124 PetriNetUnfolderBase]: 1934/3554 cut-off events. [2024-11-28 03:16:30,178 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2024-11-28 03:16:30,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6483 conditions, 3554 events. 1934/3554 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 24066 event pairs, 1449 based on Foata normal form. 0/3412 useless extension candidates. Maximal degree in co-relation 4280. Up to 2775 conditions per place. [2024-11-28 03:16:30,201 INFO L140 encePairwiseOnDemand]: 53/59 looper letters, 37 selfloop transitions, 6 changer transitions 0/58 dead transitions. [2024-11-28 03:16:30,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 58 transitions, 313 flow [2024-11-28 03:16:30,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:16:30,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 03:16:30,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 139 transitions. [2024-11-28 03:16:30,202 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4711864406779661 [2024-11-28 03:16:30,203 INFO L175 Difference]: Start difference. First operand has 71 places, 61 transitions, 233 flow. Second operand 5 states and 139 transitions. [2024-11-28 03:16:30,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 58 transitions, 313 flow [2024-11-28 03:16:30,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 58 transitions, 277 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-11-28 03:16:30,205 INFO L231 Difference]: Finished difference. Result has 66 places, 58 transitions, 203 flow [2024-11-28 03:16:30,205 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=203, PETRI_PLACES=66, PETRI_TRANSITIONS=58} [2024-11-28 03:16:30,206 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 6 predicate places. [2024-11-28 03:16:30,206 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 58 transitions, 203 flow [2024-11-28 03:16:30,206 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:16:30,206 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:16:30,206 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:16:30,206 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-28 03:16:30,206 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 03:16:30,207 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:16:30,207 INFO L85 PathProgramCache]: Analyzing trace with hash 426616636, now seen corresponding path program 1 times [2024-11-28 03:16:30,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:16:30,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375620799] [2024-11-28 03:16:30,207 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:16:30,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:16:30,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:16:30,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:16:30,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:16:30,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375620799] [2024-11-28 03:16:30,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375620799] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:16:30,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592050675] [2024-11-28 03:16:30,441 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:16:30,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:16:30,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:16:30,444 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:16:30,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 03:16:30,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:16:30,527 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-28 03:16:30,529 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:16:30,538 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 [2024-11-28 03:16:30,547 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 [2024-11-28 03:16:30,615 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 03:16:30,616 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 [2024-11-28 03:16:30,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 24 [2024-11-28 03:16:30,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:16:30,936 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:16:31,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:16:31,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592050675] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 03:16:31,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:16:31,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 12 [2024-11-28 03:16:31,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860073606] [2024-11-28 03:16:31,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:16:31,229 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 03:16:31,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:16:31,230 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 03:16:31,230 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-28 03:16:31,463 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 59 [2024-11-28 03:16:31,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 58 transitions, 203 flow. Second operand has 6 states, 6 states have (on average 28.666666666666668) internal successors, (172), 6 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:16:31,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:16:31,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 59 [2024-11-28 03:16:31,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:16:32,182 INFO L124 PetriNetUnfolderBase]: 2003/3950 cut-off events. [2024-11-28 03:16:32,182 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2024-11-28 03:16:32,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6935 conditions, 3950 events. 2003/3950 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 29363 event pairs, 918 based on Foata normal form. 0/3380 useless extension candidates. Maximal degree in co-relation 2312. Up to 1860 conditions per place. [2024-11-28 03:16:32,217 INFO L140 encePairwiseOnDemand]: 50/59 looper letters, 46 selfloop transitions, 12 changer transitions 0/74 dead transitions. [2024-11-28 03:16:32,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 74 transitions, 359 flow [2024-11-28 03:16:32,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 03:16:32,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 03:16:32,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 237 transitions. [2024-11-28 03:16:32,218 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5738498789346247 [2024-11-28 03:16:32,218 INFO L175 Difference]: Start difference. First operand has 66 places, 58 transitions, 203 flow. Second operand 7 states and 237 transitions. [2024-11-28 03:16:32,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 74 transitions, 359 flow [2024-11-28 03:16:32,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 74 transitions, 350 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-28 03:16:32,221 INFO L231 Difference]: Finished difference. Result has 71 places, 60 transitions, 239 flow [2024-11-28 03:16:32,221 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=239, PETRI_PLACES=71, PETRI_TRANSITIONS=60} [2024-11-28 03:16:32,224 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 11 predicate places. [2024-11-28 03:16:32,225 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 60 transitions, 239 flow [2024-11-28 03:16:32,226 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.666666666666668) internal successors, (172), 6 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:16:32,226 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:16:32,226 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:16:32,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-28 03:16:32,426 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:16:32,426 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 03:16:32,427 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:16:32,427 INFO L85 PathProgramCache]: Analyzing trace with hash 340214674, now seen corresponding path program 1 times [2024-11-28 03:16:32,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:16:32,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705535742] [2024-11-28 03:16:32,427 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:16:32,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:16:32,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:16:32,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:16:32,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:16:32,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705535742] [2024-11-28 03:16:32,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705535742] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:16:32,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:16:32,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 03:16:32,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067749929] [2024-11-28 03:16:32,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:16:32,493 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:16:32,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:16:32,493 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:16:32,493 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:16:32,530 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 59 [2024-11-28 03:16:32,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 60 transitions, 239 flow. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:16:32,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:16:32,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 59 [2024-11-28 03:16:32,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:16:32,906 INFO L124 PetriNetUnfolderBase]: 1295/2516 cut-off events. [2024-11-28 03:16:32,906 INFO L125 PetriNetUnfolderBase]: For 1698/2031 co-relation queries the response was YES. [2024-11-28 03:16:32,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5418 conditions, 2516 events. 1295/2516 cut-off events. For 1698/2031 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 17204 event pairs, 918 based on Foata normal form. 117/2432 useless extension candidates. Maximal degree in co-relation 1806. Up to 1860 conditions per place. [2024-11-28 03:16:32,924 INFO L140 encePairwiseOnDemand]: 54/59 looper letters, 37 selfloop transitions, 4 changer transitions 0/57 dead transitions. [2024-11-28 03:16:32,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 57 transitions, 315 flow [2024-11-28 03:16:32,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:16:32,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:16:32,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-11-28 03:16:32,926 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.538135593220339 [2024-11-28 03:16:32,926 INFO L175 Difference]: Start difference. First operand has 71 places, 60 transitions, 239 flow. Second operand 4 states and 127 transitions. [2024-11-28 03:16:32,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 57 transitions, 315 flow [2024-11-28 03:16:32,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 57 transitions, 307 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-28 03:16:32,931 INFO L231 Difference]: Finished difference. Result has 68 places, 57 transitions, 233 flow [2024-11-28 03:16:32,931 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=233, PETRI_PLACES=68, PETRI_TRANSITIONS=57} [2024-11-28 03:16:32,932 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 8 predicate places. [2024-11-28 03:16:32,932 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 57 transitions, 233 flow [2024-11-28 03:16:32,933 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:16:32,934 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:16:32,934 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:16:32,934 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-28 03:16:32,934 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 03:16:32,934 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:16:32,935 INFO L85 PathProgramCache]: Analyzing trace with hash 340214675, now seen corresponding path program 1 times [2024-11-28 03:16:32,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:16:32,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190242242] [2024-11-28 03:16:32,935 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:16:32,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:16:32,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:16:33,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:16:33,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:16:33,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190242242] [2024-11-28 03:16:33,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190242242] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:16:33,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537837282] [2024-11-28 03:16:33,166 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:16:33,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:16:33,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:16:33,169 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:16:33,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 03:16:33,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:16:33,259 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 03:16:33,260 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:16:33,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:16:33,359 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:16:33,421 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 [2024-11-28 03:16:33,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:16:33,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537837282] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:16:33,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:16:33,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-28 03:16:33,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756630229] [2024-11-28 03:16:33,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:16:33,434 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 03:16:33,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:16:33,435 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 03:16:33,435 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-28 03:16:33,781 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-28 03:16:33,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 57 transitions, 233 flow. Second operand has 11 states, 11 states have (on average 29.727272727272727) internal successors, (327), 11 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:16:33,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:16:33,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-28 03:16:33,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:16:34,358 INFO L124 PetriNetUnfolderBase]: 1709/3296 cut-off events. [2024-11-28 03:16:34,358 INFO L125 PetriNetUnfolderBase]: For 1116/1338 co-relation queries the response was YES. [2024-11-28 03:16:34,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7132 conditions, 3296 events. 1709/3296 cut-off events. For 1116/1338 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 22942 event pairs, 918 based on Foata normal form. 237/3319 useless extension candidates. Maximal degree in co-relation 2377. Up to 1986 conditions per place. [2024-11-28 03:16:34,377 INFO L140 encePairwiseOnDemand]: 50/59 looper letters, 45 selfloop transitions, 12 changer transitions 0/72 dead transitions. [2024-11-28 03:16:34,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 72 transitions, 389 flow [2024-11-28 03:16:34,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:16:34,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 03:16:34,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 217 transitions. [2024-11-28 03:16:34,378 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6129943502824858 [2024-11-28 03:16:34,378 INFO L175 Difference]: Start difference. First operand has 68 places, 57 transitions, 233 flow. Second operand 6 states and 217 transitions. [2024-11-28 03:16:34,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 72 transitions, 389 flow [2024-11-28 03:16:34,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 72 transitions, 384 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 03:16:34,382 INFO L231 Difference]: Finished difference. Result has 72 places, 58 transitions, 265 flow [2024-11-28 03:16:34,382 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=265, PETRI_PLACES=72, PETRI_TRANSITIONS=58} [2024-11-28 03:16:34,383 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 12 predicate places. [2024-11-28 03:16:34,383 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 58 transitions, 265 flow [2024-11-28 03:16:34,383 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 29.727272727272727) internal successors, (327), 11 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:16:34,383 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:16:34,383 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:16:34,392 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-28 03:16:34,584 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-28 03:16:34,585 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 03:16:34,585 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:16:34,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1946687541, now seen corresponding path program 1 times [2024-11-28 03:16:34,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:16:34,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025001103] [2024-11-28 03:16:34,586 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:16:34,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:16:34,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:16:34,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:16:34,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:16:34,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025001103] [2024-11-28 03:16:34,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025001103] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:16:34,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588512494] [2024-11-28 03:16:34,726 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:16:34,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:16:34,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:16:34,728 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:16:34,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 03:16:34,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:16:34,818 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 03:16:34,819 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:16:34,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:16:34,893 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:16:34,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:16:34,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588512494] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:16:34,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:16:34,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-28 03:16:34,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185506462] [2024-11-28 03:16:34,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:16:34,970 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 03:16:34,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:16:34,971 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 03:16:34,973 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-11-28 03:16:35,110 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-28 03:16:35,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 58 transitions, 265 flow. Second operand has 14 states, 14 states have (on average 30.0) internal successors, (420), 14 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:16:35,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:16:35,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-28 03:16:35,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:16:35,579 INFO L124 PetriNetUnfolderBase]: 1213/2206 cut-off events. [2024-11-28 03:16:35,579 INFO L125 PetriNetUnfolderBase]: For 4275/4679 co-relation queries the response was YES. [2024-11-28 03:16:35,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5858 conditions, 2206 events. 1213/2206 cut-off events. For 4275/4679 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 13110 event pairs, 643 based on Foata normal form. 0/2039 useless extension candidates. Maximal degree in co-relation 2731. Up to 825 conditions per place. [2024-11-28 03:16:35,594 INFO L140 encePairwiseOnDemand]: 49/59 looper letters, 62 selfloop transitions, 16 changer transitions 0/93 dead transitions. [2024-11-28 03:16:35,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 93 transitions, 563 flow [2024-11-28 03:16:35,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 03:16:35,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 03:16:35,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 325 transitions. [2024-11-28 03:16:35,595 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6120527306967984 [2024-11-28 03:16:35,595 INFO L175 Difference]: Start difference. First operand has 72 places, 58 transitions, 265 flow. Second operand 9 states and 325 transitions. [2024-11-28 03:16:35,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 93 transitions, 563 flow [2024-11-28 03:16:35,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 93 transitions, 523 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-28 03:16:35,599 INFO L231 Difference]: Finished difference. Result has 77 places, 60 transitions, 287 flow [2024-11-28 03:16:35,600 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=287, PETRI_PLACES=77, PETRI_TRANSITIONS=60} [2024-11-28 03:16:35,600 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 17 predicate places. [2024-11-28 03:16:35,600 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 60 transitions, 287 flow [2024-11-28 03:16:35,601 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 30.0) internal successors, (420), 14 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:16:35,601 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:16:35,601 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:16:35,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-28 03:16:35,804 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-28 03:16:35,805 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 03:16:35,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:16:35,805 INFO L85 PathProgramCache]: Analyzing trace with hash 528818040, now seen corresponding path program 1 times [2024-11-28 03:16:35,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:16:35,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822563309] [2024-11-28 03:16:35,805 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:16:35,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:16:35,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:16:35,983 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:16:35,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:16:35,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822563309] [2024-11-28 03:16:35,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822563309] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:16:35,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854065416] [2024-11-28 03:16:35,983 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:16:35,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:16:35,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:16:35,988 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:16:35,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 03:16:36,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:16:36,075 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 03:16:36,076 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:16:36,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:16:36,156 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:16:36,225 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:16:36,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854065416] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:16:36,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:16:36,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-28 03:16:36,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008165930] [2024-11-28 03:16:36,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:16:36,226 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 03:16:36,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:16:36,227 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 03:16:36,227 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-28 03:16:36,336 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-28 03:16:36,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 60 transitions, 287 flow. Second operand has 14 states, 14 states have (on average 29.928571428571427) internal successors, (419), 14 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:16:36,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:16:36,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-28 03:16:36,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:16:36,886 INFO L124 PetriNetUnfolderBase]: 1359/2506 cut-off events. [2024-11-28 03:16:36,887 INFO L125 PetriNetUnfolderBase]: For 1979/2098 co-relation queries the response was YES. [2024-11-28 03:16:36,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6387 conditions, 2506 events. 1359/2506 cut-off events. For 1979/2098 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 15239 event pairs, 676 based on Foata normal form. 64/2431 useless extension candidates. Maximal degree in co-relation 2901. Up to 947 conditions per place. [2024-11-28 03:16:36,903 INFO L140 encePairwiseOnDemand]: 48/59 looper letters, 69 selfloop transitions, 18 changer transitions 0/102 dead transitions. [2024-11-28 03:16:36,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 102 transitions, 594 flow [2024-11-28 03:16:36,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 03:16:36,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-28 03:16:36,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 366 transitions. [2024-11-28 03:16:36,905 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6203389830508474 [2024-11-28 03:16:36,906 INFO L175 Difference]: Start difference. First operand has 77 places, 60 transitions, 287 flow. Second operand 10 states and 366 transitions. [2024-11-28 03:16:36,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 102 transitions, 594 flow [2024-11-28 03:16:36,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 102 transitions, 568 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-28 03:16:36,910 INFO L231 Difference]: Finished difference. Result has 83 places, 64 transitions, 342 flow [2024-11-28 03:16:36,910 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=342, PETRI_PLACES=83, PETRI_TRANSITIONS=64} [2024-11-28 03:16:36,911 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 23 predicate places. [2024-11-28 03:16:36,911 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 64 transitions, 342 flow [2024-11-28 03:16:36,911 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 29.928571428571427) internal successors, (419), 14 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:16:36,911 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:16:36,911 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:16:36,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-28 03:16:37,113 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-28 03:16:37,114 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 03:16:37,114 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:16:37,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1866029077, now seen corresponding path program 1 times [2024-11-28 03:16:37,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:16:37,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062128532] [2024-11-28 03:16:37,115 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:16:37,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:16:37,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:16:37,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:16:37,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:16:37,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062128532] [2024-11-28 03:16:37,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062128532] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:16:37,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:16:37,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 03:16:37,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471893553] [2024-11-28 03:16:37,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:16:37,434 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 03:16:37,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:16:37,434 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 03:16:37,434 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-28 03:16:37,674 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 59 [2024-11-28 03:16:37,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 64 transitions, 342 flow. Second operand has 7 states, 7 states have (on average 27.0) internal successors, (189), 7 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:16:37,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:16:37,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 59 [2024-11-28 03:16:37,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:16:38,164 INFO L124 PetriNetUnfolderBase]: 1767/3120 cut-off events. [2024-11-28 03:16:38,164 INFO L125 PetriNetUnfolderBase]: For 8610/9271 co-relation queries the response was YES. [2024-11-28 03:16:38,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9343 conditions, 3120 events. 1767/3120 cut-off events. For 8610/9271 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 19007 event pairs, 748 based on Foata normal form. 0/2961 useless extension candidates. Maximal degree in co-relation 5989. Up to 1518 conditions per place. [2024-11-28 03:16:38,188 INFO L140 encePairwiseOnDemand]: 51/59 looper letters, 60 selfloop transitions, 10 changer transitions 0/84 dead transitions. [2024-11-28 03:16:38,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 84 transitions, 599 flow [2024-11-28 03:16:38,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:16:38,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 03:16:38,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 193 transitions. [2024-11-28 03:16:38,190 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5451977401129944 [2024-11-28 03:16:38,190 INFO L175 Difference]: Start difference. First operand has 83 places, 64 transitions, 342 flow. Second operand 6 states and 193 transitions. [2024-11-28 03:16:38,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 84 transitions, 599 flow [2024-11-28 03:16:38,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 84 transitions, 569 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-11-28 03:16:38,199 INFO L231 Difference]: Finished difference. Result has 84 places, 66 transitions, 355 flow [2024-11-28 03:16:38,200 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=355, PETRI_PLACES=84, PETRI_TRANSITIONS=66} [2024-11-28 03:16:38,200 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 24 predicate places. [2024-11-28 03:16:38,201 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 66 transitions, 355 flow [2024-11-28 03:16:38,202 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 27.0) internal successors, (189), 7 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:16:38,202 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:16:38,202 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:16:38,202 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-28 03:16:38,202 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 03:16:38,202 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:16:38,203 INFO L85 PathProgramCache]: Analyzing trace with hash -2012325672, now seen corresponding path program 1 times [2024-11-28 03:16:38,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:16:38,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744364177] [2024-11-28 03:16:38,203 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:16:38,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:16:38,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:16:38,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:16:38,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:16:38,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744364177] [2024-11-28 03:16:38,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744364177] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:16:38,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877025937] [2024-11-28 03:16:38,515 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:16:38,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:16:38,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:16:38,517 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:16:38,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 03:16:38,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:16:38,612 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-28 03:16:38,614 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:16:38,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:16:38,811 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:16:38,957 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 36 treesize of output 32 [2024-11-28 03:16:39,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:16:39,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877025937] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:16:39,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:16:39,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-11-28 03:16:39,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740381302] [2024-11-28 03:16:39,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:16:39,068 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 03:16:39,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:16:39,068 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 03:16:39,069 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2024-11-28 03:16:40,064 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-28 03:16:40,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 66 transitions, 355 flow. Second operand has 20 states, 20 states have (on average 30.1) internal successors, (602), 20 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:16:40,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:16:40,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-28 03:16:40,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:16:41,128 INFO L124 PetriNetUnfolderBase]: 1633/2914 cut-off events. [2024-11-28 03:16:41,129 INFO L125 PetriNetUnfolderBase]: For 8919/9617 co-relation queries the response was YES. [2024-11-28 03:16:41,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9643 conditions, 2914 events. 1633/2914 cut-off events. For 8919/9617 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 17815 event pairs, 872 based on Foata normal form. 1/2782 useless extension candidates. Maximal degree in co-relation 6391. Up to 799 conditions per place. [2024-11-28 03:16:41,151 INFO L140 encePairwiseOnDemand]: 47/59 looper letters, 117 selfloop transitions, 24 changer transitions 0/157 dead transitions. [2024-11-28 03:16:41,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 157 transitions, 1109 flow [2024-11-28 03:16:41,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 03:16:41,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-28 03:16:41,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 662 transitions. [2024-11-28 03:16:41,154 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5905441570026762 [2024-11-28 03:16:41,154 INFO L175 Difference]: Start difference. First operand has 84 places, 66 transitions, 355 flow. Second operand 19 states and 662 transitions. [2024-11-28 03:16:41,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 157 transitions, 1109 flow [2024-11-28 03:16:41,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 157 transitions, 1100 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-28 03:16:41,163 INFO L231 Difference]: Finished difference. Result has 101 places, 74 transitions, 446 flow [2024-11-28 03:16:41,163 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=446, PETRI_PLACES=101, PETRI_TRANSITIONS=74} [2024-11-28 03:16:41,164 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 41 predicate places. [2024-11-28 03:16:41,164 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 74 transitions, 446 flow [2024-11-28 03:16:41,164 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 30.1) internal successors, (602), 20 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:16:41,164 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:16:41,164 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:16:41,174 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 03:16:41,368 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-28 03:16:41,369 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 03:16:41,369 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:16:41,369 INFO L85 PathProgramCache]: Analyzing trace with hash -6593622, now seen corresponding path program 2 times [2024-11-28 03:16:41,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:16:41,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761615528] [2024-11-28 03:16:41,369 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:16:41,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:16:41,386 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 03:16:41,386 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:16:41,629 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 03:16:41,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:16:41,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761615528] [2024-11-28 03:16:41,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761615528] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:16:41,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:16:41,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 03:16:41,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084095254] [2024-11-28 03:16:41,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:16:41,630 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 03:16:41,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:16:41,630 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 03:16:41,630 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-28 03:16:41,884 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 59 [2024-11-28 03:16:41,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 74 transitions, 446 flow. Second operand has 7 states, 7 states have (on average 25.857142857142858) internal successors, (181), 7 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:16:41,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:16:41,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 59 [2024-11-28 03:16:41,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:16:42,353 INFO L124 PetriNetUnfolderBase]: 1721/3093 cut-off events. [2024-11-28 03:16:42,353 INFO L125 PetriNetUnfolderBase]: For 10366/11096 co-relation queries the response was YES. [2024-11-28 03:16:42,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10843 conditions, 3093 events. 1721/3093 cut-off events. For 10366/11096 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 19442 event pairs, 493 based on Foata normal form. 18/3035 useless extension candidates. Maximal degree in co-relation 7221. Up to 1147 conditions per place. [2024-11-28 03:16:42,377 INFO L140 encePairwiseOnDemand]: 51/59 looper letters, 87 selfloop transitions, 12 changer transitions 0/113 dead transitions. [2024-11-28 03:16:42,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 113 transitions, 904 flow [2024-11-28 03:16:42,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 03:16:42,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 03:16:42,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 221 transitions. [2024-11-28 03:16:42,379 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5351089588377724 [2024-11-28 03:16:42,379 INFO L175 Difference]: Start difference. First operand has 101 places, 74 transitions, 446 flow. Second operand 7 states and 221 transitions. [2024-11-28 03:16:42,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 113 transitions, 904 flow [2024-11-28 03:16:42,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 113 transitions, 886 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-28 03:16:42,390 INFO L231 Difference]: Finished difference. Result has 100 places, 73 transitions, 450 flow [2024-11-28 03:16:42,391 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=450, PETRI_PLACES=100, PETRI_TRANSITIONS=73} [2024-11-28 03:16:42,391 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 40 predicate places. [2024-11-28 03:16:42,391 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 73 transitions, 450 flow [2024-11-28 03:16:42,392 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.857142857142858) internal successors, (181), 7 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:16:42,392 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:16:42,392 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:16:42,392 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-28 03:16:42,392 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 03:16:42,393 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:16:42,393 INFO L85 PathProgramCache]: Analyzing trace with hash -204401426, now seen corresponding path program 1 times [2024-11-28 03:16:42,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:16:42,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223046516] [2024-11-28 03:16:42,393 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:16:42,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:16:42,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:16:42,788 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:16:42,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:16:42,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223046516] [2024-11-28 03:16:42,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223046516] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:16:42,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453763679] [2024-11-28 03:16:42,788 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:16:42,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:16:42,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:16:42,793 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:16:42,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 03:16:42,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:16:42,894 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 03:16:42,896 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:16:43,024 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 03:16:43,024 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:16:43,120 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 [2024-11-28 03:16:43,158 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 03:16:43,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453763679] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:16:43,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:16:43,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2024-11-28 03:16:43,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162500970] [2024-11-28 03:16:43,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:16:43,159 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 03:16:43,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:16:43,160 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 03:16:43,160 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2024-11-28 03:16:44,106 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-28 03:16:44,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 73 transitions, 450 flow. Second operand has 18 states, 18 states have (on average 30.166666666666668) internal successors, (543), 18 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:16:44,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:16:44,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-28 03:16:44,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:16:45,151 INFO L124 PetriNetUnfolderBase]: 2034/3531 cut-off events. [2024-11-28 03:16:45,151 INFO L125 PetriNetUnfolderBase]: For 12364/13381 co-relation queries the response was YES. [2024-11-28 03:16:45,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12931 conditions, 3531 events. 2034/3531 cut-off events. For 12364/13381 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 20729 event pairs, 778 based on Foata normal form. 1/3423 useless extension candidates. Maximal degree in co-relation 8626. Up to 1184 conditions per place. [2024-11-28 03:16:45,180 INFO L140 encePairwiseOnDemand]: 48/59 looper letters, 108 selfloop transitions, 22 changer transitions 0/145 dead transitions. [2024-11-28 03:16:45,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 145 transitions, 1138 flow [2024-11-28 03:16:45,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 03:16:45,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-28 03:16:45,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 493 transitions. [2024-11-28 03:16:45,183 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5968523002421308 [2024-11-28 03:16:45,183 INFO L175 Difference]: Start difference. First operand has 100 places, 73 transitions, 450 flow. Second operand 14 states and 493 transitions. [2024-11-28 03:16:45,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 145 transitions, 1138 flow [2024-11-28 03:16:45,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 145 transitions, 1104 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-28 03:16:45,197 INFO L231 Difference]: Finished difference. Result has 110 places, 79 transitions, 520 flow [2024-11-28 03:16:45,198 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=520, PETRI_PLACES=110, PETRI_TRANSITIONS=79} [2024-11-28 03:16:45,198 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 50 predicate places. [2024-11-28 03:16:45,199 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 79 transitions, 520 flow [2024-11-28 03:16:45,199 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 30.166666666666668) internal successors, (543), 18 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:16:45,199 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:16:45,199 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:16:45,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-28 03:16:45,403 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-28 03:16:45,404 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 03:16:45,405 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:16:45,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1319948325, now seen corresponding path program 2 times [2024-11-28 03:16:45,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:16:45,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237687021] [2024-11-28 03:16:45,406 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:16:45,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:16:45,422 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 03:16:45,423 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:16:45,656 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 03:16:45,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:16:45,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237687021] [2024-11-28 03:16:45,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237687021] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:16:45,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:16:45,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 03:16:45,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221571927] [2024-11-28 03:16:45,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:16:45,658 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 03:16:45,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:16:45,658 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 03:16:45,658 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-28 03:16:45,874 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 59 [2024-11-28 03:16:45,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 79 transitions, 520 flow. Second operand has 7 states, 7 states have (on average 29.142857142857142) internal successors, (204), 7 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:16:45,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:16:45,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 59 [2024-11-28 03:16:45,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:16:46,431 INFO L124 PetriNetUnfolderBase]: 2885/4701 cut-off events. [2024-11-28 03:16:46,431 INFO L125 PetriNetUnfolderBase]: For 18406/19663 co-relation queries the response was YES. [2024-11-28 03:16:46,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18029 conditions, 4701 events. 2885/4701 cut-off events. For 18406/19663 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 27179 event pairs, 1291 based on Foata normal form. 92/4747 useless extension candidates. Maximal degree in co-relation 13180. Up to 2591 conditions per place. [2024-11-28 03:16:46,519 INFO L140 encePairwiseOnDemand]: 51/59 looper letters, 100 selfloop transitions, 16 changer transitions 0/129 dead transitions. [2024-11-28 03:16:46,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 129 transitions, 1110 flow [2024-11-28 03:16:46,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:16:46,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 03:16:46,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 216 transitions. [2024-11-28 03:16:46,520 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6101694915254238 [2024-11-28 03:16:46,521 INFO L175 Difference]: Start difference. First operand has 110 places, 79 transitions, 520 flow. Second operand 6 states and 216 transitions. [2024-11-28 03:16:46,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 129 transitions, 1110 flow [2024-11-28 03:16:46,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 129 transitions, 1083 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-28 03:16:46,536 INFO L231 Difference]: Finished difference. Result has 109 places, 81 transitions, 561 flow [2024-11-28 03:16:46,537 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=493, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=561, PETRI_PLACES=109, PETRI_TRANSITIONS=81} [2024-11-28 03:16:46,537 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 49 predicate places. [2024-11-28 03:16:46,537 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 81 transitions, 561 flow [2024-11-28 03:16:46,538 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 29.142857142857142) internal successors, (204), 7 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:16:46,538 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:16:46,538 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:16:46,538 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-28 03:16:46,538 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 03:16:46,539 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:16:46,539 INFO L85 PathProgramCache]: Analyzing trace with hash 106644131, now seen corresponding path program 2 times [2024-11-28 03:16:46,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:16:46,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61563908] [2024-11-28 03:16:46,539 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:16:46,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:16:46,567 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:16:46,567 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:16:46,936 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 03:16:46,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:16:46,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61563908] [2024-11-28 03:16:46,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61563908] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:16:46,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579681889] [2024-11-28 03:16:46,937 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:16:46,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:16:46,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:16:46,939 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:16:46,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 03:16:47,049 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:16:47,049 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:16:47,050 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-28 03:16:47,053 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:16:47,068 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 [2024-11-28 03:16:47,153 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 03:16:47,154 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 [2024-11-28 03:16:47,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-28 03:16:47,324 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 03:16:47,324 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:16:47,548 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 52 treesize of output 48 [2024-11-28 03:16:47,723 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 03:16:47,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579681889] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:16:47,723 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:16:47,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 6] total 18 [2024-11-28 03:16:47,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936015995] [2024-11-28 03:16:47,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:16:47,724 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 03:16:47,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:16:47,725 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 03:16:47,726 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2024-11-28 03:16:48,919 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 59 [2024-11-28 03:16:48,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 81 transitions, 561 flow. Second operand has 20 states, 20 states have (on average 24.3) internal successors, (486), 20 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:16:48,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:16:48,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 59 [2024-11-28 03:16:48,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:16:51,336 INFO L124 PetriNetUnfolderBase]: 7027/10547 cut-off events. [2024-11-28 03:16:51,336 INFO L125 PetriNetUnfolderBase]: For 34132/35225 co-relation queries the response was YES. [2024-11-28 03:16:51,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40862 conditions, 10547 events. 7027/10547 cut-off events. For 34132/35225 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 60473 event pairs, 1088 based on Foata normal form. 324/10860 useless extension candidates. Maximal degree in co-relation 30451. Up to 2295 conditions per place. [2024-11-28 03:16:51,386 INFO L140 encePairwiseOnDemand]: 47/59 looper letters, 214 selfloop transitions, 30 changer transitions 0/253 dead transitions. [2024-11-28 03:16:51,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 253 transitions, 2130 flow [2024-11-28 03:16:51,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-28 03:16:51,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-28 03:16:51,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 568 transitions. [2024-11-28 03:16:51,388 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5348399246704332 [2024-11-28 03:16:51,388 INFO L175 Difference]: Start difference. First operand has 109 places, 81 transitions, 561 flow. Second operand 18 states and 568 transitions. [2024-11-28 03:16:51,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 253 transitions, 2130 flow [2024-11-28 03:16:51,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 253 transitions, 1981 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-11-28 03:16:51,428 INFO L231 Difference]: Finished difference. Result has 122 places, 91 transitions, 677 flow [2024-11-28 03:16:51,428 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=677, PETRI_PLACES=122, PETRI_TRANSITIONS=91} [2024-11-28 03:16:51,429 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 62 predicate places. [2024-11-28 03:16:51,429 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 91 transitions, 677 flow [2024-11-28 03:16:51,429 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 24.3) internal successors, (486), 20 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:16:51,429 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:16:51,429 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:16:51,438 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 03:16:51,633 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-28 03:16:51,634 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 03:16:51,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:16:51,634 INFO L85 PathProgramCache]: Analyzing trace with hash -988998388, now seen corresponding path program 1 times [2024-11-28 03:16:51,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:16:51,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863405552] [2024-11-28 03:16:51,634 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:16:51,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:16:51,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:16:51,942 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:16:51,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:16:51,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863405552] [2024-11-28 03:16:51,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863405552] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:16:51,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032243095] [2024-11-28 03:16:51,943 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:16:51,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:16:51,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:16:51,945 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:16:51,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 03:16:52,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:16:52,046 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-28 03:16:52,047 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:16:52,209 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 03:16:52,209 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:16:52,342 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 [2024-11-28 03:16:52,403 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 03:16:52,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032243095] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:16:52,403 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:16:52,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 21 [2024-11-28 03:16:52,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220880209] [2024-11-28 03:16:52,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:16:52,405 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-28 03:16:52,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:16:52,407 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-28 03:16:52,407 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2024-11-28 03:16:53,605 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-28 03:16:53,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 91 transitions, 677 flow. Second operand has 22 states, 22 states have (on average 29.681818181818183) internal successors, (653), 22 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:16:53,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:16:53,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-28 03:16:53,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:16:54,926 INFO L124 PetriNetUnfolderBase]: 2944/5361 cut-off events. [2024-11-28 03:16:54,926 INFO L125 PetriNetUnfolderBase]: For 22940/23500 co-relation queries the response was YES. [2024-11-28 03:16:54,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21887 conditions, 5361 events. 2944/5361 cut-off events. For 22940/23500 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 35218 event pairs, 1185 based on Foata normal form. 137/5256 useless extension candidates. Maximal degree in co-relation 15399. Up to 1937 conditions per place. [2024-11-28 03:16:54,967 INFO L140 encePairwiseOnDemand]: 49/59 looper letters, 112 selfloop transitions, 21 changer transitions 0/151 dead transitions. [2024-11-28 03:16:54,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 151 transitions, 1281 flow [2024-11-28 03:16:54,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 03:16:54,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-28 03:16:54,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 428 transitions. [2024-11-28 03:16:54,969 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6045197740112994 [2024-11-28 03:16:54,969 INFO L175 Difference]: Start difference. First operand has 122 places, 91 transitions, 677 flow. Second operand 12 states and 428 transitions. [2024-11-28 03:16:54,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 151 transitions, 1281 flow [2024-11-28 03:16:54,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 151 transitions, 1239 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-11-28 03:16:54,992 INFO L231 Difference]: Finished difference. Result has 124 places, 91 transitions, 684 flow [2024-11-28 03:16:54,992 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=635, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=684, PETRI_PLACES=124, PETRI_TRANSITIONS=91} [2024-11-28 03:16:54,992 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 64 predicate places. [2024-11-28 03:16:54,993 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 91 transitions, 684 flow [2024-11-28 03:16:54,993 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 29.681818181818183) internal successors, (653), 22 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:16:54,993 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:16:54,993 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:16:54,999 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-28 03:16:55,193 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:16:55,194 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 03:16:55,194 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:16:55,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1228302370, now seen corresponding path program 1 times [2024-11-28 03:16:55,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:16:55,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848520996] [2024-11-28 03:16:55,194 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:16:55,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:16:55,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:16:55,382 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:16:55,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:16:55,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848520996] [2024-11-28 03:16:55,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848520996] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:16:55,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351773937] [2024-11-28 03:16:55,383 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:16:55,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:16:55,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:16:55,387 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:16:55,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 03:16:55,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:16:55,508 INFO L256 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 03:16:55,510 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:16:55,677 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:16:55,677 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:16:55,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:16:55,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351773937] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:16:55,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:16:55,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-28 03:16:55,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196516836] [2024-11-28 03:16:55,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:16:55,790 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 03:16:55,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:16:55,791 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 03:16:55,791 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2024-11-28 03:16:55,936 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-28 03:16:55,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 91 transitions, 684 flow. Second operand has 15 states, 15 states have (on average 30.4) internal successors, (456), 15 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:16:55,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:16:55,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-28 03:16:55,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:16:57,090 INFO L124 PetriNetUnfolderBase]: 3005/4849 cut-off events. [2024-11-28 03:16:57,090 INFO L125 PetriNetUnfolderBase]: For 26736/27787 co-relation queries the response was YES. [2024-11-28 03:16:57,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21178 conditions, 4849 events. 3005/4849 cut-off events. For 26736/27787 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 27698 event pairs, 1623 based on Foata normal form. 125/4804 useless extension candidates. Maximal degree in co-relation 15469. Up to 2651 conditions per place. [2024-11-28 03:16:57,214 INFO L140 encePairwiseOnDemand]: 48/59 looper letters, 96 selfloop transitions, 21 changer transitions 0/134 dead transitions. [2024-11-28 03:16:57,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 134 transitions, 1256 flow [2024-11-28 03:16:57,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 03:16:57,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-28 03:16:57,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 360 transitions. [2024-11-28 03:16:57,216 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6101694915254238 [2024-11-28 03:16:57,216 INFO L175 Difference]: Start difference. First operand has 124 places, 91 transitions, 684 flow. Second operand 10 states and 360 transitions. [2024-11-28 03:16:57,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 134 transitions, 1256 flow [2024-11-28 03:16:57,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 134 transitions, 1198 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-11-28 03:16:57,243 INFO L231 Difference]: Finished difference. Result has 124 places, 90 transitions, 698 flow [2024-11-28 03:16:57,243 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=610, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=698, PETRI_PLACES=124, PETRI_TRANSITIONS=90} [2024-11-28 03:16:57,244 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 64 predicate places. [2024-11-28 03:16:57,244 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 90 transitions, 698 flow [2024-11-28 03:16:57,244 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 30.4) internal successors, (456), 15 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:16:57,244 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:16:57,244 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-28 03:16:57,253 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-28 03:16:57,448 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:16:57,449 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 03:16:57,449 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:16:57,449 INFO L85 PathProgramCache]: Analyzing trace with hash 225600190, now seen corresponding path program 2 times [2024-11-28 03:16:57,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:16:57,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306561234] [2024-11-28 03:16:57,449 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:16:57,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:16:57,463 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 03:16:57,464 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:16:57,700 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-28 03:16:57,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:16:57,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306561234] [2024-11-28 03:16:57,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306561234] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:16:57,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686108489] [2024-11-28 03:16:57,700 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:16:57,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:16:57,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:16:57,703 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:16:57,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 03:16:57,818 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 03:16:57,818 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:16:57,820 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-28 03:16:57,822 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:16:57,869 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 [2024-11-28 03:16:58,242 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-28 03:16:58,242 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:16:58,849 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-28 03:16:58,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686108489] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:16:58,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:16:58,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2024-11-28 03:16:58,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423970814] [2024-11-28 03:16:58,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:16:58,850 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 03:16:58,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:16:58,851 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 03:16:58,851 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2024-11-28 03:16:59,705 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 59 [2024-11-28 03:16:59,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 90 transitions, 698 flow. Second operand has 16 states, 16 states have (on average 28.75) internal successors, (460), 16 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:16:59,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:16:59,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 59 [2024-11-28 03:16:59,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:17:00,745 INFO L124 PetriNetUnfolderBase]: 4397/6972 cut-off events. [2024-11-28 03:17:00,745 INFO L125 PetriNetUnfolderBase]: For 26911/27524 co-relation queries the response was YES. [2024-11-28 03:17:00,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29458 conditions, 6972 events. 4397/6972 cut-off events. For 26911/27524 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 40776 event pairs, 1634 based on Foata normal form. 142/6881 useless extension candidates. Maximal degree in co-relation 21290. Up to 3186 conditions per place. [2024-11-28 03:17:00,781 INFO L140 encePairwiseOnDemand]: 53/59 looper letters, 127 selfloop transitions, 14 changer transitions 0/153 dead transitions. [2024-11-28 03:17:00,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 153 transitions, 1476 flow [2024-11-28 03:17:00,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:17:00,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 03:17:00,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 213 transitions. [2024-11-28 03:17:00,782 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6016949152542372 [2024-11-28 03:17:00,782 INFO L175 Difference]: Start difference. First operand has 124 places, 90 transitions, 698 flow. Second operand 6 states and 213 transitions. [2024-11-28 03:17:00,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 153 transitions, 1476 flow [2024-11-28 03:17:00,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 153 transitions, 1427 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-11-28 03:17:00,816 INFO L231 Difference]: Finished difference. Result has 120 places, 89 transitions, 675 flow [2024-11-28 03:17:00,816 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=647, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=675, PETRI_PLACES=120, PETRI_TRANSITIONS=89} [2024-11-28 03:17:00,817 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 60 predicate places. [2024-11-28 03:17:00,817 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 89 transitions, 675 flow [2024-11-28 03:17:00,817 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 28.75) internal successors, (460), 16 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:17:00,817 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:17:00,817 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:17:00,823 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-28 03:17:01,018 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-28 03:17:01,018 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 03:17:01,018 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:17:01,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1183409887, now seen corresponding path program 1 times [2024-11-28 03:17:01,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:17:01,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338908570] [2024-11-28 03:17:01,018 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:17:01,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:17:01,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:17:01,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:17:01,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:17:01,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338908570] [2024-11-28 03:17:01,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338908570] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:17:01,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106907581] [2024-11-28 03:17:01,103 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:17:01,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:17:01,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:17:01,105 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:17:01,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 03:17:01,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:17:01,210 INFO L256 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 03:17:01,211 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:17:01,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:17:01,252 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:17:01,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:17:01,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106907581] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 03:17:01,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:17:01,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-11-28 03:17:01,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296931723] [2024-11-28 03:17:01,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:17:01,294 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:17:01,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:17:01,295 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:17:01,295 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-28 03:17:01,324 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-28 03:17:01,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 89 transitions, 675 flow. Second operand has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:17:01,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:17:01,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-28 03:17:01,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:17:02,116 INFO L124 PetriNetUnfolderBase]: 3325/5891 cut-off events. [2024-11-28 03:17:02,116 INFO L125 PetriNetUnfolderBase]: For 24326/24847 co-relation queries the response was YES. [2024-11-28 03:17:02,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24370 conditions, 5891 events. 3325/5891 cut-off events. For 24326/24847 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 37165 event pairs, 1216 based on Foata normal form. 242/6038 useless extension candidates. Maximal degree in co-relation 17737. Up to 2538 conditions per place. [2024-11-28 03:17:02,144 INFO L140 encePairwiseOnDemand]: 53/59 looper letters, 92 selfloop transitions, 12 changer transitions 0/118 dead transitions. [2024-11-28 03:17:02,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 118 transitions, 1099 flow [2024-11-28 03:17:02,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:17:02,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 03:17:02,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 185 transitions. [2024-11-28 03:17:02,145 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6271186440677966 [2024-11-28 03:17:02,145 INFO L175 Difference]: Start difference. First operand has 120 places, 89 transitions, 675 flow. Second operand 5 states and 185 transitions. [2024-11-28 03:17:02,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 118 transitions, 1099 flow [2024-11-28 03:17:02,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 118 transitions, 1069 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-28 03:17:02,163 INFO L231 Difference]: Finished difference. Result has 120 places, 86 transitions, 649 flow [2024-11-28 03:17:02,163 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=604, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=649, PETRI_PLACES=120, PETRI_TRANSITIONS=86} [2024-11-28 03:17:02,163 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 60 predicate places. [2024-11-28 03:17:02,163 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 86 transitions, 649 flow [2024-11-28 03:17:02,164 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:17:02,164 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:17:02,164 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:17:02,172 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-28 03:17:02,364 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-28 03:17:02,364 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 03:17:02,365 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:17:02,365 INFO L85 PathProgramCache]: Analyzing trace with hash 31813321, now seen corresponding path program 2 times [2024-11-28 03:17:02,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:17:02,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282495162] [2024-11-28 03:17:02,365 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:17:02,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:17:02,390 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:17:02,390 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:17:02,712 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 03:17:02,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:17:02,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282495162] [2024-11-28 03:17:02,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282495162] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:17:02,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314259361] [2024-11-28 03:17:02,713 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:17:02,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:17:02,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:17:02,716 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:17:02,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 03:17:02,824 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:17:02,824 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:17:02,825 INFO L256 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-28 03:17:02,827 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:17:02,834 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 10 treesize of output 9 [2024-11-28 03:17:02,967 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-28 03:17:02,967 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 20 treesize of output 22 [2024-11-28 03:17:03,554 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:17:03,554 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:17:04,253 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:17:04,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314259361] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:17:04,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:17:04,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 10] total 26 [2024-11-28 03:17:04,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487732954] [2024-11-28 03:17:04,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:17:04,255 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 03:17:04,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:17:04,255 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 03:17:04,256 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=616, Unknown=0, NotChecked=0, Total=756 [2024-11-28 03:17:05,708 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 59 [2024-11-28 03:17:05,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 86 transitions, 649 flow. Second operand has 28 states, 28 states have (on average 24.321428571428573) internal successors, (681), 28 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:17:05,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:17:05,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 59 [2024-11-28 03:17:05,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:17:08,770 INFO L124 PetriNetUnfolderBase]: 5998/9275 cut-off events. [2024-11-28 03:17:08,770 INFO L125 PetriNetUnfolderBase]: For 44370/46298 co-relation queries the response was YES. [2024-11-28 03:17:08,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39337 conditions, 9275 events. 5998/9275 cut-off events. For 44370/46298 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 56461 event pairs, 1178 based on Foata normal form. 346/9292 useless extension candidates. Maximal degree in co-relation 33405. Up to 1460 conditions per place. [2024-11-28 03:17:08,820 INFO L140 encePairwiseOnDemand]: 48/59 looper letters, 252 selfloop transitions, 43 changer transitions 0/308 dead transitions. [2024-11-28 03:17:08,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 308 transitions, 2823 flow [2024-11-28 03:17:08,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-28 03:17:08,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-11-28 03:17:08,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 823 transitions. [2024-11-28 03:17:08,821 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49818401937046003 [2024-11-28 03:17:08,821 INFO L175 Difference]: Start difference. First operand has 120 places, 86 transitions, 649 flow. Second operand 28 states and 823 transitions. [2024-11-28 03:17:08,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 308 transitions, 2823 flow [2024-11-28 03:17:08,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 308 transitions, 2748 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-28 03:17:08,880 INFO L231 Difference]: Finished difference. Result has 145 places, 106 transitions, 898 flow [2024-11-28 03:17:08,880 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=617, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=898, PETRI_PLACES=145, PETRI_TRANSITIONS=106} [2024-11-28 03:17:08,880 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 85 predicate places. [2024-11-28 03:17:08,880 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 106 transitions, 898 flow [2024-11-28 03:17:08,880 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 24.321428571428573) internal successors, (681), 28 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:17:08,880 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:17:08,881 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:17:08,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-28 03:17:09,081 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-28 03:17:09,081 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 03:17:09,081 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:17:09,082 INFO L85 PathProgramCache]: Analyzing trace with hash 986213818, now seen corresponding path program 1 times [2024-11-28 03:17:09,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:17:09,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325071441] [2024-11-28 03:17:09,082 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:17:09,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:17:09,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:17:09,379 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:17:09,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:17:09,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325071441] [2024-11-28 03:17:09,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325071441] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:17:09,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810176856] [2024-11-28 03:17:09,381 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:17:09,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:17:09,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:17:09,384 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:17:09,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 03:17:09,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:17:09,516 INFO L256 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-28 03:17:09,518 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:17:09,929 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:17:09,929 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:17:10,301 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 36 treesize of output 32 [2024-11-28 03:17:10,502 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:17:10,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810176856] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:17:10,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:17:10,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 27 [2024-11-28 03:17:10,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560456182] [2024-11-28 03:17:10,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:17:10,503 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 03:17:10,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:17:10,503 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 03:17:10,503 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2024-11-28 03:17:12,339 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 59 [2024-11-28 03:17:12,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 106 transitions, 898 flow. Second operand has 28 states, 28 states have (on average 29.25) internal successors, (819), 28 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:17:12,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:17:12,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 59 [2024-11-28 03:17:12,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:17:15,568 INFO L124 PetriNetUnfolderBase]: 7291/11626 cut-off events. [2024-11-28 03:17:15,568 INFO L125 PetriNetUnfolderBase]: For 53444/55977 co-relation queries the response was YES. [2024-11-28 03:17:15,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49848 conditions, 11626 events. 7291/11626 cut-off events. For 53444/55977 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 77482 event pairs, 1611 based on Foata normal form. 402/11567 useless extension candidates. Maximal degree in co-relation 42847. Up to 1904 conditions per place. [2024-11-28 03:17:15,677 INFO L140 encePairwiseOnDemand]: 47/59 looper letters, 335 selfloop transitions, 55 changer transitions 0/405 dead transitions. [2024-11-28 03:17:15,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 405 transitions, 3703 flow [2024-11-28 03:17:15,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-28 03:17:15,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-11-28 03:17:15,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1077 transitions. [2024-11-28 03:17:15,680 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6084745762711864 [2024-11-28 03:17:15,680 INFO L175 Difference]: Start difference. First operand has 145 places, 106 transitions, 898 flow. Second operand 30 states and 1077 transitions. [2024-11-28 03:17:15,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 405 transitions, 3703 flow [2024-11-28 03:17:15,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 405 transitions, 3588 flow, removed 28 selfloop flow, removed 11 redundant places. [2024-11-28 03:17:15,949 INFO L231 Difference]: Finished difference. Result has 163 places, 115 transitions, 994 flow [2024-11-28 03:17:15,949 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=801, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=994, PETRI_PLACES=163, PETRI_TRANSITIONS=115} [2024-11-28 03:17:15,950 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 103 predicate places. [2024-11-28 03:17:15,950 INFO L471 AbstractCegarLoop]: Abstraction has has 163 places, 115 transitions, 994 flow [2024-11-28 03:17:15,950 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 29.25) internal successors, (819), 28 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:17:15,951 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:17:15,951 INFO L206 CegarLoopForPetriNet]: trace histogram [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] [2024-11-28 03:17:15,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-28 03:17:16,151 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-28 03:17:16,151 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 03:17:16,152 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:17:16,152 INFO L85 PathProgramCache]: Analyzing trace with hash -799778871, now seen corresponding path program 1 times [2024-11-28 03:17:16,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:17:16,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432173589] [2024-11-28 03:17:16,152 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:17:16,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:17:16,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:17:16,210 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:17:16,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:17:16,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432173589] [2024-11-28 03:17:16,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432173589] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:17:16,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:17:16,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:17:16,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387075199] [2024-11-28 03:17:16,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:17:16,211 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:17:16,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:17:16,212 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:17:16,212 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:17:16,228 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-28 03:17:16,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 115 transitions, 994 flow. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:17:16,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:17:16,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-28 03:17:16,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:17:17,940 INFO L124 PetriNetUnfolderBase]: 7055/11681 cut-off events. [2024-11-28 03:17:17,940 INFO L125 PetriNetUnfolderBase]: For 49870/52201 co-relation queries the response was YES. [2024-11-28 03:17:17,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47688 conditions, 11681 events. 7055/11681 cut-off events. For 49870/52201 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 81437 event pairs, 2172 based on Foata normal form. 380/11298 useless extension candidates. Maximal degree in co-relation 45078. Up to 5253 conditions per place. [2024-11-28 03:17:18,027 INFO L140 encePairwiseOnDemand]: 54/59 looper letters, 100 selfloop transitions, 23 changer transitions 0/138 dead transitions. [2024-11-28 03:17:18,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 138 transitions, 1411 flow [2024-11-28 03:17:18,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:17:18,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:17:18,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 153 transitions. [2024-11-28 03:17:18,028 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6483050847457628 [2024-11-28 03:17:18,028 INFO L175 Difference]: Start difference. First operand has 163 places, 115 transitions, 994 flow. Second operand 4 states and 153 transitions. [2024-11-28 03:17:18,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 138 transitions, 1411 flow [2024-11-28 03:17:18,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 138 transitions, 1307 flow, removed 3 selfloop flow, removed 23 redundant places. [2024-11-28 03:17:18,085 INFO L231 Difference]: Finished difference. Result has 142 places, 111 transitions, 887 flow [2024-11-28 03:17:18,085 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=841, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=887, PETRI_PLACES=142, PETRI_TRANSITIONS=111} [2024-11-28 03:17:18,086 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 82 predicate places. [2024-11-28 03:17:18,086 INFO L471 AbstractCegarLoop]: Abstraction has has 142 places, 111 transitions, 887 flow [2024-11-28 03:17:18,086 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:17:18,086 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:17:18,086 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:17:18,086 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-11-28 03:17:18,086 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 03:17:18,087 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:17:18,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1729702226, now seen corresponding path program 1 times [2024-11-28 03:17:18,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:17:18,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777336696] [2024-11-28 03:17:18,087 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:17:18,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:17:18,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:17:18,271 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 03:17:18,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:17:18,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777336696] [2024-11-28 03:17:18,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777336696] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:17:18,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741710466] [2024-11-28 03:17:18,272 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:17:18,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:17:18,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:17:18,275 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:17:18,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 03:17:18,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:17:18,395 INFO L256 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 03:17:18,397 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:17:18,572 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:17:18,572 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:17:18,694 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:17:18,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741710466] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:17:18,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:17:18,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2024-11-28 03:17:18,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70450269] [2024-11-28 03:17:18,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:17:18,695 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 03:17:18,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:17:18,696 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 03:17:18,696 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2024-11-28 03:17:18,851 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-28 03:17:18,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 111 transitions, 887 flow. Second operand has 20 states, 20 states have (on average 30.45) internal successors, (609), 20 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:17:18,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:17:18,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-28 03:17:18,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:17:20,196 INFO L124 PetriNetUnfolderBase]: 5710/9679 cut-off events. [2024-11-28 03:17:20,197 INFO L125 PetriNetUnfolderBase]: For 40476/41900 co-relation queries the response was YES. [2024-11-28 03:17:20,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39191 conditions, 9679 events. 5710/9679 cut-off events. For 40476/41900 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 66729 event pairs, 2682 based on Foata normal form. 300/9485 useless extension candidates. Maximal degree in co-relation 39135. Up to 2995 conditions per place. [2024-11-28 03:17:20,259 INFO L140 encePairwiseOnDemand]: 48/59 looper letters, 135 selfloop transitions, 34 changer transitions 0/190 dead transitions. [2024-11-28 03:17:20,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 190 transitions, 1801 flow [2024-11-28 03:17:20,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 03:17:20,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-28 03:17:20,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 434 transitions. [2024-11-28 03:17:20,261 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6129943502824858 [2024-11-28 03:17:20,261 INFO L175 Difference]: Start difference. First operand has 142 places, 111 transitions, 887 flow. Second operand 12 states and 434 transitions. [2024-11-28 03:17:20,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 190 transitions, 1801 flow [2024-11-28 03:17:20,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 190 transitions, 1723 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-28 03:17:20,300 INFO L231 Difference]: Finished difference. Result has 153 places, 115 transitions, 971 flow [2024-11-28 03:17:20,300 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=841, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=971, PETRI_PLACES=153, PETRI_TRANSITIONS=115} [2024-11-28 03:17:20,300 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 93 predicate places. [2024-11-28 03:17:20,300 INFO L471 AbstractCegarLoop]: Abstraction has has 153 places, 115 transitions, 971 flow [2024-11-28 03:17:20,301 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 30.45) internal successors, (609), 20 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:17:20,301 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:17:20,301 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:17:20,311 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-28 03:17:20,501 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-28 03:17:20,501 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 03:17:20,502 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:17:20,502 INFO L85 PathProgramCache]: Analyzing trace with hash 388252377, now seen corresponding path program 2 times [2024-11-28 03:17:20,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:17:20,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610083791] [2024-11-28 03:17:20,502 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:17:20,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:17:20,523 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:17:20,524 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:17:20,729 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 03:17:20,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:17:20,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610083791] [2024-11-28 03:17:20,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610083791] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:17:20,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310596553] [2024-11-28 03:17:20,729 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:17:20,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:17:20,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:17:20,731 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:17:20,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-28 03:17:20,847 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:17:20,847 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:17:20,849 INFO L256 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 03:17:20,850 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:17:21,077 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 03:17:21,077 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:17:21,243 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 03:17:21,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310596553] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:17:21,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:17:21,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2024-11-28 03:17:21,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154490798] [2024-11-28 03:17:21,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:17:21,244 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-28 03:17:21,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:17:21,245 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-28 03:17:21,245 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2024-11-28 03:17:21,413 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-28 03:17:21,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 115 transitions, 971 flow. Second operand has 24 states, 24 states have (on average 30.208333333333332) internal successors, (725), 24 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:17:21,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:17:21,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-28 03:17:21,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:17:23,785 INFO L124 PetriNetUnfolderBase]: 8083/13220 cut-off events. [2024-11-28 03:17:23,785 INFO L125 PetriNetUnfolderBase]: For 59674/61883 co-relation queries the response was YES. [2024-11-28 03:17:23,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55852 conditions, 13220 events. 8083/13220 cut-off events. For 59674/61883 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 90794 event pairs, 3128 based on Foata normal form. 190/12737 useless extension candidates. Maximal degree in co-relation 55790. Up to 3275 conditions per place. [2024-11-28 03:17:23,924 INFO L140 encePairwiseOnDemand]: 48/59 looper letters, 170 selfloop transitions, 51 changer transitions 0/242 dead transitions. [2024-11-28 03:17:23,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 242 transitions, 2392 flow [2024-11-28 03:17:23,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 03:17:23,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-28 03:17:23,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 542 transitions. [2024-11-28 03:17:23,927 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6124293785310735 [2024-11-28 03:17:23,927 INFO L175 Difference]: Start difference. First operand has 153 places, 115 transitions, 971 flow. Second operand 15 states and 542 transitions. [2024-11-28 03:17:23,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 242 transitions, 2392 flow [2024-11-28 03:17:24,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 242 transitions, 2318 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-11-28 03:17:24,017 INFO L231 Difference]: Finished difference. Result has 164 places, 135 transitions, 1305 flow [2024-11-28 03:17:24,017 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=921, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1305, PETRI_PLACES=164, PETRI_TRANSITIONS=135} [2024-11-28 03:17:24,018 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 104 predicate places. [2024-11-28 03:17:24,018 INFO L471 AbstractCegarLoop]: Abstraction has has 164 places, 135 transitions, 1305 flow [2024-11-28 03:17:24,018 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 30.208333333333332) internal successors, (725), 24 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:17:24,018 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:17:24,018 INFO L206 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1] [2024-11-28 03:17:24,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-28 03:17:24,219 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-28 03:17:24,219 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 03:17:24,219 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:17:24,220 INFO L85 PathProgramCache]: Analyzing trace with hash 653002722, now seen corresponding path program 1 times [2024-11-28 03:17:24,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:17:24,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098413604] [2024-11-28 03:17:24,220 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:17:24,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:17:24,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:17:25,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:17:25,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:17:25,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098413604] [2024-11-28 03:17:25,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098413604] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:17:25,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864738866] [2024-11-28 03:17:25,131 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:17:25,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:17:25,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:17:25,133 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:17:25,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-28 03:17:25,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:17:25,248 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-28 03:17:25,250 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:17:25,257 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 [2024-11-28 03:17:25,303 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 03:17:25,352 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 03:17:25,353 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 [2024-11-28 03:17:25,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 03:17:25,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-11-28 03:17:25,828 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:17:25,828 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:17:34,733 INFO L349 Elim1Store]: treesize reduction 28, result has 64.6 percent of original size [2024-11-28 03:17:34,733 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 840 treesize of output 650 [2024-11-28 03:17:34,789 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:17:34,790 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 528 treesize of output 498 [2024-11-28 03:17:49,369 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 31 treesize of output 27 [2024-11-28 03:17:53,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:17:53,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864738866] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:17:53,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:17:53,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 32 [2024-11-28 03:17:53,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186868736] [2024-11-28 03:17:53,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:17:53,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-28 03:17:53,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:17:53,466 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-28 03:17:53,466 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=940, Unknown=3, NotChecked=0, Total=1056 [2024-11-28 03:17:57,532 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:18:01,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:18:05,751 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:18:09,827 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:18:13,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:18:17,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:18:22,048 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:18:26,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:18:30,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:18:34,289 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:18:38,378 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:18:42,457 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:18:46,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:18:50,638 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:18:54,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:18:58,812 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:19:02,894 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:19:06,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:19:11,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:19:15,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:19:19,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:19:23,204 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:19:23,205 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 59 [2024-11-28 03:19:23,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 135 transitions, 1305 flow. Second operand has 33 states, 33 states have (on average 6.212121212121212) internal successors, (205), 33 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:19:23,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:19:23,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 59 [2024-11-28 03:19:23,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:19:36,926 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:19:40,948 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:19:45,046 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:19:57,341 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:20:06,299 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:20:10,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:20:14,465 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:20:18,536 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:20:22,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:20:26,716 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:20:30,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:20:34,918 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:20:39,111 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:20:44,119 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:20:48,481 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:20:53,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 03:21:01,121 INFO L124 PetriNetUnfolderBase]: 36776/51455 cut-off events. [2024-11-28 03:21:01,121 INFO L125 PetriNetUnfolderBase]: For 221337/221337 co-relation queries the response was YES. [2024-11-28 03:21:01,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213715 conditions, 51455 events. 36776/51455 cut-off events. For 221337/221337 co-relation queries the response was YES. Maximal size of possible extension queue 763. Compared 288210 event pairs, 11404 based on Foata normal form. 1/50417 useless extension candidates. Maximal degree in co-relation 213649. Up to 46700 conditions per place. [2024-11-28 03:21:01,477 INFO L140 encePairwiseOnDemand]: 42/59 looper letters, 173 selfloop transitions, 47 changer transitions 42/263 dead transitions. [2024-11-28 03:21:01,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 263 transitions, 2704 flow [2024-11-28 03:21:01,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-28 03:21:01,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-28 03:21:01,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 235 transitions. [2024-11-28 03:21:01,479 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.22128060263653485 [2024-11-28 03:21:01,479 INFO L175 Difference]: Start difference. First operand has 164 places, 135 transitions, 1305 flow. Second operand 18 states and 235 transitions. [2024-11-28 03:21:01,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 263 transitions, 2704 flow [2024-11-28 03:21:01,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 263 transitions, 2690 flow, removed 7 selfloop flow, removed 0 redundant places. [2024-11-28 03:21:01,850 INFO L231 Difference]: Finished difference. Result has 190 places, 146 transitions, 1523 flow [2024-11-28 03:21:01,851 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=1295, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1523, PETRI_PLACES=190, PETRI_TRANSITIONS=146} [2024-11-28 03:21:01,851 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 130 predicate places. [2024-11-28 03:21:01,851 INFO L471 AbstractCegarLoop]: Abstraction has has 190 places, 146 transitions, 1523 flow [2024-11-28 03:21:01,851 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 6.212121212121212) internal successors, (205), 33 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:21:01,851 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:21:01,852 INFO L206 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1] [2024-11-28 03:21:01,862 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-28 03:21:02,052 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:21:02,052 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 03:21:02,053 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:21:02,053 INFO L85 PathProgramCache]: Analyzing trace with hash 2141730438, now seen corresponding path program 2 times [2024-11-28 03:21:02,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:21:02,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635734307] [2024-11-28 03:21:02,053 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:21:02,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:21:02,088 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:21:02,088 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:21:03,296 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:21:03,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:21:03,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635734307] [2024-11-28 03:21:03,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635734307] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:21:03,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580653885] [2024-11-28 03:21:03,297 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:21:03,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:21:03,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:21:03,299 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:21:03,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-28 03:21:03,425 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:21:03,425 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:21:03,427 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-28 03:21:03,428 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:21:03,695 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 03:21:04,320 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:21:04,321 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 [2024-11-28 03:21:04,351 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:21:04,352 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:21:05,222 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:21:05,222 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 248 treesize of output 232 [2024-11-28 03:21:05,757 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:21:05,758 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 283 treesize of output 243 [2024-11-28 03:21:05,790 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:21:05,791 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 166 treesize of output 130 [2024-11-28 03:21:06,048 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:21:06,048 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 214 treesize of output 190 [2024-11-28 03:21:06,075 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:21:06,075 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 166 treesize of output 130 [2024-11-28 03:21:07,137 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:21:07,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580653885] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:21:07,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:21:07,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 31 [2024-11-28 03:21:07,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486376744] [2024-11-28 03:21:07,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:21:07,138 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-28 03:21:07,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:21:07,146 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-28 03:21:07,148 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2024-11-28 03:21:14,020 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 59 [2024-11-28 03:21:14,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 146 transitions, 1523 flow. Second operand has 32 states, 32 states have (on average 26.3125) internal successors, (842), 32 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:21:14,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:21:14,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 59 [2024-11-28 03:21:14,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:21:23,988 INFO L124 PetriNetUnfolderBase]: 21881/33322 cut-off events. [2024-11-28 03:21:23,988 INFO L125 PetriNetUnfolderBase]: For 166525/168185 co-relation queries the response was YES. [2024-11-28 03:21:24,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144495 conditions, 33322 events. 21881/33322 cut-off events. For 166525/168185 co-relation queries the response was YES. Maximal size of possible extension queue 823. Compared 223218 event pairs, 5860 based on Foata normal form. 102/32450 useless extension candidates. Maximal degree in co-relation 144430. Up to 26913 conditions per place. [2024-11-28 03:21:24,281 INFO L140 encePairwiseOnDemand]: 40/59 looper letters, 230 selfloop transitions, 182 changer transitions 23/443 dead transitions. [2024-11-28 03:21:24,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 443 transitions, 5153 flow [2024-11-28 03:21:24,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-28 03:21:24,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-11-28 03:21:24,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1047 transitions. [2024-11-28 03:21:24,284 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5219341974077767 [2024-11-28 03:21:24,284 INFO L175 Difference]: Start difference. First operand has 190 places, 146 transitions, 1523 flow. Second operand 34 states and 1047 transitions. [2024-11-28 03:21:24,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 443 transitions, 5153 flow [2024-11-28 03:21:24,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 443 transitions, 5057 flow, removed 27 selfloop flow, removed 10 redundant places. [2024-11-28 03:21:24,778 INFO L231 Difference]: Finished difference. Result has 225 places, 291 transitions, 3836 flow [2024-11-28 03:21:24,778 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=1471, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=3836, PETRI_PLACES=225, PETRI_TRANSITIONS=291} [2024-11-28 03:21:24,779 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 165 predicate places. [2024-11-28 03:21:24,779 INFO L471 AbstractCegarLoop]: Abstraction has has 225 places, 291 transitions, 3836 flow [2024-11-28 03:21:24,780 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 26.3125) internal successors, (842), 32 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:21:24,780 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:21:24,780 INFO L206 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1] [2024-11-28 03:21:24,788 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-28 03:21:24,980 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:21:24,981 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 03:21:24,981 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:21:24,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1164410720, now seen corresponding path program 3 times [2024-11-28 03:21:24,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:21:24,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96910410] [2024-11-28 03:21:24,982 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:21:24,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:21:25,018 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:21:25,018 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:21:26,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:21:26,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:21:26,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96910410] [2024-11-28 03:21:26,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96910410] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:21:26,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372410152] [2024-11-28 03:21:26,579 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:21:26,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:21:26,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:21:26,581 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:21:26,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-28 03:21:26,729 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:21:26,729 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:21:26,731 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-28 03:21:26,733 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:21:27,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 03:21:28,166 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:21:28,166 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 [2024-11-28 03:21:28,200 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:21:28,201 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:21:29,032 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:21:29,032 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 256 treesize of output 240 [2024-11-28 03:21:29,532 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:21:29,533 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 198 treesize of output 174 [2024-11-28 03:21:29,562 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:21:29,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 166 treesize of output 134 [2024-11-28 03:21:29,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:21:29,824 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 267 treesize of output 211 [2024-11-28 03:21:29,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:21:29,839 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 110 [2024-11-28 03:21:29,931 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-28 03:21:29,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 300 treesize of output 255 [2024-11-28 03:21:29,943 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 03:21:29,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 252 treesize of output 188 [2024-11-28 03:21:30,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:21:30,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372410152] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:21:30,373 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:21:30,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 35 [2024-11-28 03:21:30,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348276191] [2024-11-28 03:21:30,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:21:30,373 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-28 03:21:30,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:21:30,374 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-28 03:21:30,374 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2024-11-28 03:21:39,254 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 59 [2024-11-28 03:21:39,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 291 transitions, 3836 flow. Second operand has 36 states, 36 states have (on average 25.333333333333332) internal successors, (912), 36 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:21:39,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:21:39,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 59 [2024-11-28 03:21:39,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:21:56,351 INFO L124 PetriNetUnfolderBase]: 40156/58974 cut-off events. [2024-11-28 03:21:56,351 INFO L125 PetriNetUnfolderBase]: For 402991/405860 co-relation queries the response was YES. [2024-11-28 03:21:56,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 288509 conditions, 58974 events. 40156/58974 cut-off events. For 402991/405860 co-relation queries the response was YES. Maximal size of possible extension queue 1286. Compared 395462 event pairs, 5260 based on Foata normal form. 6/57584 useless extension candidates. Maximal degree in co-relation 288412. Up to 33101 conditions per place. [2024-11-28 03:21:56,983 INFO L140 encePairwiseOnDemand]: 39/59 looper letters, 525 selfloop transitions, 220 changer transitions 31/780 dead transitions. [2024-11-28 03:21:56,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 780 transitions, 10839 flow [2024-11-28 03:21:56,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-28 03:21:56,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-11-28 03:21:56,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 897 transitions. [2024-11-28 03:21:56,986 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5429782082324455 [2024-11-28 03:21:56,986 INFO L175 Difference]: Start difference. First operand has 225 places, 291 transitions, 3836 flow. Second operand 28 states and 897 transitions. [2024-11-28 03:21:56,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 780 transitions, 10839 flow [2024-11-28 03:21:59,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 780 transitions, 10569 flow, removed 71 selfloop flow, removed 9 redundant places. [2024-11-28 03:21:59,557 INFO L231 Difference]: Finished difference. Result has 260 places, 405 transitions, 5836 flow [2024-11-28 03:21:59,557 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=3669, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=5836, PETRI_PLACES=260, PETRI_TRANSITIONS=405} [2024-11-28 03:21:59,558 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 200 predicate places. [2024-11-28 03:21:59,558 INFO L471 AbstractCegarLoop]: Abstraction has has 260 places, 405 transitions, 5836 flow [2024-11-28 03:21:59,558 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 25.333333333333332) internal successors, (912), 36 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:21:59,558 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:21:59,559 INFO L206 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1] [2024-11-28 03:21:59,571 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-28 03:21:59,759 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:21:59,759 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 03:21:59,759 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:21:59,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1967284218, now seen corresponding path program 4 times [2024-11-28 03:21:59,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:21:59,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171879950] [2024-11-28 03:21:59,760 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:21:59,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:21:59,796 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:21:59,796 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:22:01,604 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:22:01,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:22:01,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171879950] [2024-11-28 03:22:01,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171879950] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:22:01,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444055140] [2024-11-28 03:22:01,605 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:22:01,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:22:01,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:22:01,608 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:22:01,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-28 03:22:01,750 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:22:01,750 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:22:01,752 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-28 03:22:01,755 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:22:01,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 03:22:03,019 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:22:03,020 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 [2024-11-28 03:22:03,044 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:22:03,045 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:22:03,892 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:22:03,893 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 248 treesize of output 232 [2024-11-28 03:22:04,505 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 03:22:04,534 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:22:04,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 87 treesize of output 83 [2024-11-28 03:22:04,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:22:04,611 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 50 [2024-11-28 03:22:04,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 03:22:04,689 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-28 03:22:04,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 156 treesize of output 1 [2024-11-28 03:22:04,744 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:22:04,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 300 treesize of output 260 [2024-11-28 03:22:04,774 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:22:04,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 236 treesize of output 192 [2024-11-28 03:22:04,963 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-28 03:22:04,963 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 214 treesize of output 185 [2024-11-28 03:22:04,975 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-28 03:22:04,976 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 182 treesize of output 126 [2024-11-28 03:22:05,299 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:22:05,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444055140] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:22:05,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:22:05,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 11] total 33 [2024-11-28 03:22:05,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93436406] [2024-11-28 03:22:05,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:22:05,300 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-28 03:22:05,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:22:05,301 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-28 03:22:05,301 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=998, Unknown=0, NotChecked=0, Total=1122 [2024-11-28 03:22:13,711 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 59 [2024-11-28 03:22:13,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 405 transitions, 5836 flow. Second operand has 34 states, 34 states have (on average 27.205882352941178) internal successors, (925), 34 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:22:13,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:22:13,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 59 [2024-11-28 03:22:13,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:22:29,018 INFO L124 PetriNetUnfolderBase]: 31108/48098 cut-off events. [2024-11-28 03:22:29,018 INFO L125 PetriNetUnfolderBase]: For 464348/466955 co-relation queries the response was YES. [2024-11-28 03:22:29,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262006 conditions, 48098 events. 31108/48098 cut-off events. For 464348/466955 co-relation queries the response was YES. Maximal size of possible extension queue 1257. Compared 347552 event pairs, 10642 based on Foata normal form. 595/48138 useless extension candidates. Maximal degree in co-relation 261894. Up to 40192 conditions per place. [2024-11-28 03:22:29,949 INFO L140 encePairwiseOnDemand]: 42/59 looper letters, 276 selfloop transitions, 197 changer transitions 42/537 dead transitions. [2024-11-28 03:22:29,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 537 transitions, 8703 flow [2024-11-28 03:22:29,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-28 03:22:29,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-28 03:22:29,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 586 transitions. [2024-11-28 03:22:29,951 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.551789077212806 [2024-11-28 03:22:29,951 INFO L175 Difference]: Start difference. First operand has 260 places, 405 transitions, 5836 flow. Second operand 18 states and 586 transitions. [2024-11-28 03:22:29,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 537 transitions, 8703 flow [2024-11-28 03:22:32,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 537 transitions, 8378 flow, removed 71 selfloop flow, removed 8 redundant places. [2024-11-28 03:22:32,325 INFO L231 Difference]: Finished difference. Result has 273 places, 442 transitions, 6708 flow [2024-11-28 03:22:32,325 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=5565, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=6708, PETRI_PLACES=273, PETRI_TRANSITIONS=442} [2024-11-28 03:22:32,326 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 213 predicate places. [2024-11-28 03:22:32,326 INFO L471 AbstractCegarLoop]: Abstraction has has 273 places, 442 transitions, 6708 flow [2024-11-28 03:22:32,327 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 27.205882352941178) internal successors, (925), 34 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:22:32,327 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:22:32,327 INFO L206 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1] [2024-11-28 03:22:32,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-28 03:22:32,527 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b65b4fcc-966d-4b0b-9a9f-66205ebe0eca/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:22:32,527 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-11-28 03:22:32,528 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:22:32,528 INFO L85 PathProgramCache]: Analyzing trace with hash 38583168, now seen corresponding path program 5 times [2024-11-28 03:22:32,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:22:32,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842230719] [2024-11-28 03:22:32,528 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:22:32,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:22:32,563 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:22:32,563 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat