./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/unroll-3.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_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/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_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/unroll-3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/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_91625859-8996-483c-9e95-ff13adacd1b5/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 a4cca88acec68e5dbb90cd5700ef248bb5273dc097847f9475a683bfbdc7b189 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 20:09:26,893 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 20:09:27,013 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-27 20:09:27,019 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 20:09:27,020 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 20:09:27,050 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 20:09:27,052 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 20:09:27,053 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 20:09:27,053 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 20:09:27,053 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 20:09:27,054 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 20:09:27,055 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 20:09:27,055 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 20:09:27,055 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 20:09:27,056 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 20:09:27,056 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 20:09:27,056 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 20:09:27,057 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-27 20:09:27,057 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 20:09:27,057 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 20:09:27,057 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-27 20:09:27,057 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-27 20:09:27,058 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-27 20:09:27,058 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 20:09:27,058 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-27 20:09:27,058 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-27 20:09:27,058 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 20:09:27,058 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 20:09:27,058 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 20:09:27,059 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 20:09:27,059 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 20:09:27,059 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 20:09:27,059 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 20:09:27,059 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:09:27,060 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 20:09:27,060 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 20:09:27,060 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 20:09:27,060 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 20:09:27,060 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:09:27,060 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 20:09:27,061 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 20:09:27,061 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-27 20:09:27,061 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-27 20:09:27,061 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 20:09:27,061 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 20:09:27,061 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 20:09:27,061 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 20:09:27,061 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_91625859-8996-483c-9e95-ff13adacd1b5/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 -> a4cca88acec68e5dbb90cd5700ef248bb5273dc097847f9475a683bfbdc7b189 [2024-11-27 20:09:27,449 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 20:09:27,460 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 20:09:27,464 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 20:09:27,467 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 20:09:27,468 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 20:09:27,470 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/unroll-3.wvr.c [2024-11-27 20:09:30,683 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/data/549ba7258/dc1ae4209e3d4409ba58221eb620d51f/FLAG47ac47e18 [2024-11-27 20:09:31,034 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 20:09:31,035 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/sv-benchmarks/c/weaver/unroll-3.wvr.c [2024-11-27 20:09:31,044 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/data/549ba7258/dc1ae4209e3d4409ba58221eb620d51f/FLAG47ac47e18 [2024-11-27 20:09:31,060 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/data/549ba7258/dc1ae4209e3d4409ba58221eb620d51f [2024-11-27 20:09:31,064 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 20:09:31,066 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 20:09:31,067 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 20:09:31,068 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 20:09:31,076 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 20:09:31,079 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 08:09:31" (1/1) ... [2024-11-27 20:09:31,080 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52047879 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:09:31, skipping insertion in model container [2024-11-27 20:09:31,080 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 08:09:31" (1/1) ... [2024-11-27 20:09:31,105 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 20:09:31,308 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-27 20:09:31,310 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 20:09:31,322 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 20:09:31,349 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 20:09:31,372 INFO L204 MainTranslator]: Completed translation [2024-11-27 20:09:31,372 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:09:31 WrapperNode [2024-11-27 20:09:31,372 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 20:09:31,374 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 20:09:31,374 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 20:09:31,374 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 20:09:31,383 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:09:31" (1/1) ... [2024-11-27 20:09:31,394 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:09:31" (1/1) ... [2024-11-27 20:09:31,442 INFO L138 Inliner]: procedures = 23, calls = 25, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 136 [2024-11-27 20:09:31,443 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 20:09:31,444 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 20:09:31,444 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 20:09:31,444 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 20:09:31,456 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:09:31" (1/1) ... [2024-11-27 20:09:31,457 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:09:31" (1/1) ... [2024-11-27 20:09:31,461 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:09:31" (1/1) ... [2024-11-27 20:09:31,488 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-27 20:09:31,489 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:09:31" (1/1) ... [2024-11-27 20:09:31,489 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:09:31" (1/1) ... [2024-11-27 20:09:31,500 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:09:31" (1/1) ... [2024-11-27 20:09:31,501 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:09:31" (1/1) ... [2024-11-27 20:09:31,507 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:09:31" (1/1) ... [2024-11-27 20:09:31,512 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:09:31" (1/1) ... [2024-11-27 20:09:31,514 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:09:31" (1/1) ... [2024-11-27 20:09:31,520 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 20:09:31,520 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 20:09:31,521 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 20:09:31,521 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 20:09:31,522 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:09:31" (1/1) ... [2024-11-27 20:09:31,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:09:31,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:09:31,571 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 20:09:31,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 20:09:31,610 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 20:09:31,610 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-27 20:09:31,610 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-27 20:09:31,610 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-27 20:09:31,610 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-27 20:09:31,611 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-27 20:09:31,611 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-27 20:09:31,611 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-27 20:09:31,611 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-27 20:09:31,612 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-27 20:09:31,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 20:09:31,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 20:09:31,612 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-27 20:09:31,612 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-27 20:09:31,614 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-27 20:09:31,727 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 20:09:31,729 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 20:09:32,145 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-27 20:09:32,145 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 20:09:32,450 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 20:09:32,450 INFO L312 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-27 20:09:32,450 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 08:09:32 BoogieIcfgContainer [2024-11-27 20:09:32,450 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 20:09:32,452 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 20:09:32,453 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 20:09:32,457 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 20:09:32,458 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 08:09:31" (1/3) ... [2024-11-27 20:09:32,458 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20992f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 08:09:32, skipping insertion in model container [2024-11-27 20:09:32,459 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:09:31" (2/3) ... [2024-11-27 20:09:32,459 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20992f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 08:09:32, skipping insertion in model container [2024-11-27 20:09:32,459 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 08:09:32" (3/3) ... [2024-11-27 20:09:32,460 INFO L128 eAbstractionObserver]: Analyzing ICFG unroll-3.wvr.c [2024-11-27 20:09:32,477 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 20:09:32,478 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG unroll-3.wvr.c that has 3 procedures, 35 locations, 1 initial locations, 3 loop locations, and 12 error locations. [2024-11-27 20:09:32,479 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-27 20:09:32,565 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-27 20:09:32,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 37 transitions, 88 flow [2024-11-27 20:09:32,659 INFO L124 PetriNetUnfolderBase]: 3/35 cut-off events. [2024-11-27 20:09:32,662 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-27 20:09:32,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 35 events. 3/35 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 52 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2024-11-27 20:09:32,669 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 37 transitions, 88 flow [2024-11-27 20:09:32,674 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 34 transitions, 80 flow [2024-11-27 20:09:32,692 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 20:09:32,713 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;@44bbc480, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 20:09:32,716 INFO L334 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2024-11-27 20:09:32,724 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-27 20:09:32,725 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-27 20:09:32,725 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-27 20:09:32,725 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:32,726 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-27 20:09:32,727 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:09:32,734 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:32,736 INFO L85 PathProgramCache]: Analyzing trace with hash 479539, now seen corresponding path program 1 times [2024-11-27 20:09:32,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:32,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148534902] [2024-11-27 20:09:32,747 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:32,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:32,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:33,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:09:33,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:33,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148534902] [2024-11-27 20:09:33,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148534902] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:09:33,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:09:33,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-27 20:09:33,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958238482] [2024-11-27 20:09:33,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:09:33,107 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 20:09:33,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:33,145 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 20:09:33,147 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 20:09:33,180 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-11-27 20:09:33,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:33,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:09:33,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-11-27 20:09:33,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:09:33,364 INFO L124 PetriNetUnfolderBase]: 88/213 cut-off events. [2024-11-27 20:09:33,364 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-11-27 20:09:33,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 389 conditions, 213 events. 88/213 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 893 event pairs, 64 based on Foata normal form. 1/162 useless extension candidates. Maximal degree in co-relation 334. Up to 153 conditions per place. [2024-11-27 20:09:33,369 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 19 selfloop transitions, 2 changer transitions 0/31 dead transitions. [2024-11-27 20:09:33,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 31 transitions, 116 flow [2024-11-27 20:09:33,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 20:09:33,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 20:09:33,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 62 transitions. [2024-11-27 20:09:33,386 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5585585585585585 [2024-11-27 20:09:33,388 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 80 flow. Second operand 3 states and 62 transitions. [2024-11-27 20:09:33,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 31 transitions, 116 flow [2024-11-27 20:09:33,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 31 transitions, 108 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-27 20:09:33,398 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 70 flow [2024-11-27 20:09:33,401 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2024-11-27 20:09:33,409 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, -5 predicate places. [2024-11-27 20:09:33,409 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 70 flow [2024-11-27 20:09:33,409 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:33,409 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:33,409 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-27 20:09:33,410 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-27 20:09:33,410 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:09:33,411 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:33,411 INFO L85 PathProgramCache]: Analyzing trace with hash 479540, now seen corresponding path program 1 times [2024-11-27 20:09:33,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:33,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456614942] [2024-11-27 20:09:33,411 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:33,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:33,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:33,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:09:33,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:33,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456614942] [2024-11-27 20:09:33,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456614942] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:09:33,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:09:33,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 20:09:33,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111172961] [2024-11-27 20:09:33,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:09:33,988 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:09:33,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:33,989 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:09:33,990 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-27 20:09:34,034 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-11-27 20:09:34,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 70 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:34,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:09:34,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-11-27 20:09:34,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:09:34,256 INFO L124 PetriNetUnfolderBase]: 89/216 cut-off events. [2024-11-27 20:09:34,256 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-27 20:09:34,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 386 conditions, 216 events. 89/216 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 906 event pairs, 64 based on Foata normal form. 0/164 useless extension candidates. Maximal degree in co-relation 364. Up to 158 conditions per place. [2024-11-27 20:09:34,259 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 22 selfloop transitions, 3 changer transitions 0/34 dead transitions. [2024-11-27 20:09:34,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 34 transitions, 128 flow [2024-11-27 20:09:34,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 20:09:34,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 20:09:34,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 65 transitions. [2024-11-27 20:09:34,263 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5855855855855856 [2024-11-27 20:09:34,263 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 70 flow. Second operand 3 states and 65 transitions. [2024-11-27 20:09:34,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 34 transitions, 128 flow [2024-11-27 20:09:34,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 34 transitions, 122 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-27 20:09:34,267 INFO L231 Difference]: Finished difference. Result has 34 places, 33 transitions, 85 flow [2024-11-27 20:09:34,267 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=85, PETRI_PLACES=34, PETRI_TRANSITIONS=33} [2024-11-27 20:09:34,269 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, -4 predicate places. [2024-11-27 20:09:34,269 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 33 transitions, 85 flow [2024-11-27 20:09:34,270 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:34,270 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:34,270 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-27 20:09:34,270 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-27 20:09:34,271 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:09:34,271 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:34,272 INFO L85 PathProgramCache]: Analyzing trace with hash 460852356, now seen corresponding path program 1 times [2024-11-27 20:09:34,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:34,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313816325] [2024-11-27 20:09:34,273 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:34,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:34,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:34,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:09:34,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:34,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313816325] [2024-11-27 20:09:34,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313816325] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:09:34,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736774640] [2024-11-27 20:09:34,841 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:34,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:09:34,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:09:34,848 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:09:34,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-27 20:09:34,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:34,946 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-27 20:09:34,952 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:09:35,046 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 [2024-11-27 20:09:35,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:09:35,394 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:09:35,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:09:35,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736774640] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:09:35,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:09:35,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-27 20:09:35,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308441078] [2024-11-27 20:09:35,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:09:35,571 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-27 20:09:35,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:35,572 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-27 20:09:35,574 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-27 20:09:35,772 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-11-27 20:09:35,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 33 transitions, 85 flow. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:35,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:09:35,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-11-27 20:09:35,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:09:36,161 INFO L124 PetriNetUnfolderBase]: 90/218 cut-off events. [2024-11-27 20:09:36,162 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-27 20:09:36,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 397 conditions, 218 events. 90/218 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 913 event pairs, 64 based on Foata normal form. 0/167 useless extension candidates. Maximal degree in co-relation 364. Up to 155 conditions per place. [2024-11-27 20:09:36,165 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 18 selfloop transitions, 9 changer transitions 0/36 dead transitions. [2024-11-27 20:09:36,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 36 transitions, 147 flow [2024-11-27 20:09:36,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 20:09:36,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-27 20:09:36,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-11-27 20:09:36,167 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46332046332046334 [2024-11-27 20:09:36,167 INFO L175 Difference]: Start difference. First operand has 34 places, 33 transitions, 85 flow. Second operand 7 states and 120 transitions. [2024-11-27 20:09:36,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 36 transitions, 147 flow [2024-11-27 20:09:36,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 36 transitions, 144 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-27 20:09:36,170 INFO L231 Difference]: Finished difference. Result has 38 places, 36 transitions, 110 flow [2024-11-27 20:09:36,170 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=110, PETRI_PLACES=38, PETRI_TRANSITIONS=36} [2024-11-27 20:09:36,171 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 0 predicate places. [2024-11-27 20:09:36,171 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 36 transitions, 110 flow [2024-11-27 20:09:36,172 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:36,172 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:36,172 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-27 20:09:36,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-27 20:09:36,372 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:09:36,373 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:09:36,374 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:36,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1403611472, now seen corresponding path program 1 times [2024-11-27 20:09:36,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:36,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600741156] [2024-11-27 20:09:36,375 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:36,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:36,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:36,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:09:36,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:36,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600741156] [2024-11-27 20:09:36,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600741156] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:09:36,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:09:36,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 20:09:36,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708313423] [2024-11-27 20:09:36,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:09:36,467 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 20:09:36,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:36,468 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 20:09:36,469 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 20:09:36,474 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-27 20:09:36,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 36 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:36,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:09:36,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-27 20:09:36,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:09:36,591 INFO L124 PetriNetUnfolderBase]: 89/217 cut-off events. [2024-11-27 20:09:36,591 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-27 20:09:36,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 401 conditions, 217 events. 89/217 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 906 event pairs, 64 based on Foata normal form. 1/167 useless extension candidates. Maximal degree in co-relation 364. Up to 159 conditions per place. [2024-11-27 20:09:36,595 INFO L140 encePairwiseOnDemand]: 34/37 looper letters, 24 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2024-11-27 20:09:36,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 35 transitions, 156 flow [2024-11-27 20:09:36,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 20:09:36,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 20:09:36,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 66 transitions. [2024-11-27 20:09:36,599 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5945945945945946 [2024-11-27 20:09:36,599 INFO L175 Difference]: Start difference. First operand has 38 places, 36 transitions, 110 flow. Second operand 3 states and 66 transitions. [2024-11-27 20:09:36,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 35 transitions, 156 flow [2024-11-27 20:09:36,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 35 transitions, 141 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-11-27 20:09:36,602 INFO L231 Difference]: Finished difference. Result has 37 places, 35 transitions, 93 flow [2024-11-27 20:09:36,604 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=93, PETRI_PLACES=37, PETRI_TRANSITIONS=35} [2024-11-27 20:09:36,605 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, -1 predicate places. [2024-11-27 20:09:36,605 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 35 transitions, 93 flow [2024-11-27 20:09:36,605 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:36,605 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:36,606 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:36,606 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-27 20:09:36,606 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:09:36,607 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:36,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1755370496, now seen corresponding path program 1 times [2024-11-27 20:09:36,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:36,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072482066] [2024-11-27 20:09:36,607 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:36,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:36,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:36,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:09:36,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:36,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072482066] [2024-11-27 20:09:36,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072482066] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:09:36,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715721698] [2024-11-27 20:09:36,973 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:36,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:09:36,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:09:36,975 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:09:36,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-27 20:09:37,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:37,061 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-27 20:09:37,062 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:09:37,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:09:37,221 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:09:37,308 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 29 treesize of output 25 [2024-11-27 20:09:37,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:09:37,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715721698] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:09:37,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:09:37,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2024-11-27 20:09:37,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557593054] [2024-11-27 20:09:37,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:09:37,352 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-27 20:09:37,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:37,353 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-27 20:09:37,353 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-11-27 20:09:37,543 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-11-27 20:09:37,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 35 transitions, 93 flow. Second operand has 10 states, 10 states have (on average 15.0) internal successors, (150), 10 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:37,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:09:37,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-11-27 20:09:37,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:09:37,826 INFO L124 PetriNetUnfolderBase]: 175/379 cut-off events. [2024-11-27 20:09:37,827 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-27 20:09:37,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 710 conditions, 379 events. 175/379 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1784 event pairs, 64 based on Foata normal form. 0/292 useless extension candidates. Maximal degree in co-relation 696. Up to 165 conditions per place. [2024-11-27 20:09:37,833 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 37 selfloop transitions, 5 changer transitions 0/50 dead transitions. [2024-11-27 20:09:37,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 50 transitions, 210 flow [2024-11-27 20:09:37,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:09:37,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 20:09:37,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 105 transitions. [2024-11-27 20:09:37,835 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5675675675675675 [2024-11-27 20:09:37,835 INFO L175 Difference]: Start difference. First operand has 37 places, 35 transitions, 93 flow. Second operand 5 states and 105 transitions. [2024-11-27 20:09:37,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 50 transitions, 210 flow [2024-11-27 20:09:37,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 50 transitions, 206 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-27 20:09:37,837 INFO L231 Difference]: Finished difference. Result has 40 places, 36 transitions, 108 flow [2024-11-27 20:09:37,837 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=108, PETRI_PLACES=40, PETRI_TRANSITIONS=36} [2024-11-27 20:09:37,840 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 2 predicate places. [2024-11-27 20:09:37,843 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 36 transitions, 108 flow [2024-11-27 20:09:37,843 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.0) internal successors, (150), 10 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:37,843 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:37,843 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:37,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-27 20:09:38,044 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:09:38,044 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:09:38,045 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:38,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1755370497, now seen corresponding path program 1 times [2024-11-27 20:09:38,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:38,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279940185] [2024-11-27 20:09:38,045 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:38,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:38,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:38,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:09:38,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:38,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279940185] [2024-11-27 20:09:38,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279940185] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:09:38,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:09:38,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 20:09:38,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094905127] [2024-11-27 20:09:38,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:09:38,105 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:09:38,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:38,106 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:09:38,106 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 20:09:38,144 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 37 [2024-11-27 20:09:38,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 108 flow. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:38,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:09:38,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 37 [2024-11-27 20:09:38,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:09:38,240 INFO L124 PetriNetUnfolderBase]: 155/328 cut-off events. [2024-11-27 20:09:38,240 INFO L125 PetriNetUnfolderBase]: For 28/32 co-relation queries the response was YES. [2024-11-27 20:09:38,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 675 conditions, 328 events. 155/328 cut-off events. For 28/32 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1384 event pairs, 123 based on Foata normal form. 28/312 useless extension candidates. Maximal degree in co-relation 305. Up to 269 conditions per place. [2024-11-27 20:09:38,243 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 24 selfloop transitions, 3 changer transitions 0/32 dead transitions. [2024-11-27 20:09:38,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 32 transitions, 154 flow [2024-11-27 20:09:38,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 20:09:38,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 20:09:38,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 61 transitions. [2024-11-27 20:09:38,244 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41216216216216217 [2024-11-27 20:09:38,244 INFO L175 Difference]: Start difference. First operand has 40 places, 36 transitions, 108 flow. Second operand 4 states and 61 transitions. [2024-11-27 20:09:38,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 32 transitions, 154 flow [2024-11-27 20:09:38,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 32 transitions, 147 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-27 20:09:38,246 INFO L231 Difference]: Finished difference. Result has 36 places, 32 transitions, 99 flow [2024-11-27 20:09:38,246 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=99, PETRI_PLACES=36, PETRI_TRANSITIONS=32} [2024-11-27 20:09:38,247 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, -2 predicate places. [2024-11-27 20:09:38,247 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 32 transitions, 99 flow [2024-11-27 20:09:38,247 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:38,247 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:38,247 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:38,247 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-27 20:09:38,247 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:09:38,248 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:38,248 INFO L85 PathProgramCache]: Analyzing trace with hash 985854613, now seen corresponding path program 1 times [2024-11-27 20:09:38,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:38,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727397063] [2024-11-27 20:09:38,248 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:38,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:38,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:38,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:09:38,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:38,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727397063] [2024-11-27 20:09:38,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727397063] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:09:38,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382238428] [2024-11-27 20:09:38,448 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:38,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:09:38,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:09:38,451 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:09:38,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-27 20:09:38,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:38,529 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-27 20:09:38,530 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:09:38,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:09:38,680 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:09:38,779 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 29 treesize of output 25 [2024-11-27 20:09:38,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:09:38,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382238428] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:09:38,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:09:38,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2024-11-27 20:09:38,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70115841] [2024-11-27 20:09:38,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:09:38,820 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-27 20:09:38,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:38,821 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-27 20:09:38,821 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-11-27 20:09:39,002 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2024-11-27 20:09:39,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 99 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:39,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:09:39,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2024-11-27 20:09:39,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:09:39,310 INFO L124 PetriNetUnfolderBase]: 293/524 cut-off events. [2024-11-27 20:09:39,310 INFO L125 PetriNetUnfolderBase]: For 66/82 co-relation queries the response was YES. [2024-11-27 20:09:39,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1120 conditions, 524 events. 293/524 cut-off events. For 66/82 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2001 event pairs, 81 based on Foata normal form. 0/392 useless extension candidates. Maximal degree in co-relation 1086. Up to 333 conditions per place. [2024-11-27 20:09:39,313 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 37 selfloop transitions, 5 changer transitions 0/44 dead transitions. [2024-11-27 20:09:39,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 44 transitions, 213 flow [2024-11-27 20:09:39,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:09:39,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 20:09:39,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 93 transitions. [2024-11-27 20:09:39,315 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5027027027027027 [2024-11-27 20:09:39,315 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 99 flow. Second operand 5 states and 93 transitions. [2024-11-27 20:09:39,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 44 transitions, 213 flow [2024-11-27 20:09:39,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 44 transitions, 209 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-27 20:09:39,317 INFO L231 Difference]: Finished difference. Result has 39 places, 33 transitions, 114 flow [2024-11-27 20:09:39,317 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=114, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2024-11-27 20:09:39,318 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 1 predicate places. [2024-11-27 20:09:39,318 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 114 flow [2024-11-27 20:09:39,318 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:39,318 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:39,318 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:39,328 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-27 20:09:39,519 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-27 20:09:39,519 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:09:39,519 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:39,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1011116228, now seen corresponding path program 1 times [2024-11-27 20:09:39,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:39,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955870341] [2024-11-27 20:09:39,520 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:39,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:39,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:39,786 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:09:39,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:39,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955870341] [2024-11-27 20:09:39,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955870341] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:09:39,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196355281] [2024-11-27 20:09:39,787 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:39,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:09:39,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:09:39,792 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:09:39,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-27 20:09:39,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:39,873 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-27 20:09:39,875 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:09:40,063 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:09:40,064 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:09:40,142 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 [2024-11-27 20:09:40,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:09:40,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196355281] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:09:40,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:09:40,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2024-11-27 20:09:40,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185555397] [2024-11-27 20:09:40,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:09:40,358 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-27 20:09:40,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:40,359 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-27 20:09:40,359 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2024-11-27 20:09:40,804 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-11-27 20:09:40,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 114 flow. Second operand has 16 states, 16 states have (on average 14.8125) internal successors, (237), 16 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:40,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:09:40,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-11-27 20:09:40,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:09:41,280 INFO L124 PetriNetUnfolderBase]: 474/918 cut-off events. [2024-11-27 20:09:41,280 INFO L125 PetriNetUnfolderBase]: For 92/97 co-relation queries the response was YES. [2024-11-27 20:09:41,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2018 conditions, 918 events. 474/918 cut-off events. For 92/97 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 4588 event pairs, 310 based on Foata normal form. 0/750 useless extension candidates. Maximal degree in co-relation 1069. Up to 441 conditions per place. [2024-11-27 20:09:41,287 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 64 selfloop transitions, 9 changer transitions 0/77 dead transitions. [2024-11-27 20:09:41,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 77 transitions, 375 flow [2024-11-27 20:09:41,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 20:09:41,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-27 20:09:41,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-11-27 20:09:41,289 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5844594594594594 [2024-11-27 20:09:41,289 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 114 flow. Second operand 8 states and 173 transitions. [2024-11-27 20:09:41,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 77 transitions, 375 flow [2024-11-27 20:09:41,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 77 transitions, 365 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-27 20:09:41,292 INFO L231 Difference]: Finished difference. Result has 46 places, 36 transitions, 150 flow [2024-11-27 20:09:41,293 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=150, PETRI_PLACES=46, PETRI_TRANSITIONS=36} [2024-11-27 20:09:41,294 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 8 predicate places. [2024-11-27 20:09:41,295 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 36 transitions, 150 flow [2024-11-27 20:09:41,296 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 14.8125) internal successors, (237), 16 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:41,296 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:41,296 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:41,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-27 20:09:41,500 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:09:41,501 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:09:41,501 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:41,501 INFO L85 PathProgramCache]: Analyzing trace with hash 496722430, now seen corresponding path program 1 times [2024-11-27 20:09:41,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:41,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291013063] [2024-11-27 20:09:41,502 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:41,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:41,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:41,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:09:41,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:41,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291013063] [2024-11-27 20:09:41,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291013063] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:09:41,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536015202] [2024-11-27 20:09:41,688 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:41,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:09:41,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:09:41,691 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:09:41,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-27 20:09:41,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:41,764 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-27 20:09:41,766 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:09:41,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:09:41,914 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:09:41,946 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 29 treesize of output 25 [2024-11-27 20:09:42,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:09:42,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536015202] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:09:42,216 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:09:42,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-27 20:09:42,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413401989] [2024-11-27 20:09:42,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:09:42,217 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-27 20:09:42,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:42,217 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-27 20:09:42,218 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-11-27 20:09:42,346 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2024-11-27 20:09:42,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 36 transitions, 150 flow. Second operand has 13 states, 13 states have (on average 13.461538461538462) internal successors, (175), 13 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:42,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:09:42,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2024-11-27 20:09:42,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:09:42,692 INFO L124 PetriNetUnfolderBase]: 629/1111 cut-off events. [2024-11-27 20:09:42,692 INFO L125 PetriNetUnfolderBase]: For 643/691 co-relation queries the response was YES. [2024-11-27 20:09:42,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2785 conditions, 1111 events. 629/1111 cut-off events. For 643/691 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 5096 event pairs, 330 based on Foata normal form. 0/951 useless extension candidates. Maximal degree in co-relation 2290. Up to 841 conditions per place. [2024-11-27 20:09:42,700 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 53 selfloop transitions, 8 changer transitions 0/63 dead transitions. [2024-11-27 20:09:42,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 63 transitions, 369 flow [2024-11-27 20:09:42,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 20:09:42,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-27 20:09:42,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-11-27 20:09:42,701 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5057915057915058 [2024-11-27 20:09:42,702 INFO L175 Difference]: Start difference. First operand has 46 places, 36 transitions, 150 flow. Second operand 7 states and 131 transitions. [2024-11-27 20:09:42,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 63 transitions, 369 flow [2024-11-27 20:09:42,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 63 transitions, 352 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-11-27 20:09:42,705 INFO L231 Difference]: Finished difference. Result has 50 places, 38 transitions, 171 flow [2024-11-27 20:09:42,705 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=171, PETRI_PLACES=50, PETRI_TRANSITIONS=38} [2024-11-27 20:09:42,706 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 12 predicate places. [2024-11-27 20:09:42,706 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 38 transitions, 171 flow [2024-11-27 20:09:42,706 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 13.461538461538462) internal successors, (175), 13 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:42,706 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:42,706 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:42,716 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-27 20:09:42,907 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-27 20:09:42,908 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:09:42,908 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:42,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1425625972, now seen corresponding path program 2 times [2024-11-27 20:09:42,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:42,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739084154] [2024-11-27 20:09:42,910 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:09:42,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:42,930 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-27 20:09:42,930 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:09:43,120 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-27 20:09:43,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:43,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739084154] [2024-11-27 20:09:43,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739084154] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:09:43,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510463526] [2024-11-27 20:09:43,121 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:09:43,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:09:43,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:09:43,124 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:09:43,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-27 20:09:43,209 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-27 20:09:43,210 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:09:43,211 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-27 20:09:43,213 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:09:43,236 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 [2024-11-27 20:09:43,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-27 20:09:43,469 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:09:43,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-27 20:09:43,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510463526] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:09:43,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:09:43,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2024-11-27 20:09:43,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47827215] [2024-11-27 20:09:43,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:09:43,661 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-27 20:09:43,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:43,662 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-27 20:09:43,662 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-11-27 20:09:43,932 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-11-27 20:09:43,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 38 transitions, 171 flow. Second operand has 10 states, 10 states have (on average 15.9) internal successors, (159), 10 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:43,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:09:43,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-11-27 20:09:43,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:09:44,263 INFO L124 PetriNetUnfolderBase]: 491/943 cut-off events. [2024-11-27 20:09:44,263 INFO L125 PetriNetUnfolderBase]: For 337/337 co-relation queries the response was YES. [2024-11-27 20:09:44,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2412 conditions, 943 events. 491/943 cut-off events. For 337/337 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 4747 event pairs, 294 based on Foata normal form. 0/879 useless extension candidates. Maximal degree in co-relation 2045. Up to 640 conditions per place. [2024-11-27 20:09:44,276 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 36 selfloop transitions, 9 changer transitions 0/49 dead transitions. [2024-11-27 20:09:44,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 49 transitions, 297 flow [2024-11-27 20:09:44,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:09:44,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 20:09:44,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2024-11-27 20:09:44,278 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.518918918918919 [2024-11-27 20:09:44,278 INFO L175 Difference]: Start difference. First operand has 50 places, 38 transitions, 171 flow. Second operand 5 states and 96 transitions. [2024-11-27 20:09:44,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 49 transitions, 297 flow [2024-11-27 20:09:44,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 49 transitions, 284 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-27 20:09:44,287 INFO L231 Difference]: Finished difference. Result has 49 places, 37 transitions, 171 flow [2024-11-27 20:09:44,287 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=171, PETRI_PLACES=49, PETRI_TRANSITIONS=37} [2024-11-27 20:09:44,288 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 11 predicate places. [2024-11-27 20:09:44,288 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 37 transitions, 171 flow [2024-11-27 20:09:44,288 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.9) internal successors, (159), 10 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:44,289 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:44,289 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:44,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-27 20:09:44,490 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-27 20:09:44,490 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:09:44,491 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:44,491 INFO L85 PathProgramCache]: Analyzing trace with hash 461622606, now seen corresponding path program 2 times [2024-11-27 20:09:44,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:44,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477167839] [2024-11-27 20:09:44,491 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:09:44,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:44,514 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-27 20:09:44,514 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:09:44,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 20:09:44,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:44,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477167839] [2024-11-27 20:09:44,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477167839] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:09:44,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:09:44,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 20:09:44,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686363925] [2024-11-27 20:09:44,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:09:44,775 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:09:44,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:44,776 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:09:44,776 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:09:44,850 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2024-11-27 20:09:44,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 37 transitions, 171 flow. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:44,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:09:44,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2024-11-27 20:09:44,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:09:45,101 INFO L124 PetriNetUnfolderBase]: 537/949 cut-off events. [2024-11-27 20:09:45,102 INFO L125 PetriNetUnfolderBase]: For 961/961 co-relation queries the response was YES. [2024-11-27 20:09:45,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2658 conditions, 949 events. 537/949 cut-off events. For 961/961 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 4216 event pairs, 330 based on Foata normal form. 32/885 useless extension candidates. Maximal degree in co-relation 2187. Up to 684 conditions per place. [2024-11-27 20:09:45,109 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 36 selfloop transitions, 8 changer transitions 0/45 dead transitions. [2024-11-27 20:09:45,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 45 transitions, 308 flow [2024-11-27 20:09:45,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:09:45,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 20:09:45,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 85 transitions. [2024-11-27 20:09:45,111 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4594594594594595 [2024-11-27 20:09:45,111 INFO L175 Difference]: Start difference. First operand has 49 places, 37 transitions, 171 flow. Second operand 5 states and 85 transitions. [2024-11-27 20:09:45,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 45 transitions, 308 flow [2024-11-27 20:09:45,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 45 transitions, 278 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-27 20:09:45,115 INFO L231 Difference]: Finished difference. Result has 47 places, 35 transitions, 161 flow [2024-11-27 20:09:45,115 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=161, PETRI_PLACES=47, PETRI_TRANSITIONS=35} [2024-11-27 20:09:45,116 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 9 predicate places. [2024-11-27 20:09:45,116 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 35 transitions, 161 flow [2024-11-27 20:09:45,116 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:45,116 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:45,116 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:45,117 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-27 20:09:45,117 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:09:45,117 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:45,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1696075580, now seen corresponding path program 1 times [2024-11-27 20:09:45,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:45,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537907217] [2024-11-27 20:09:45,117 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:45,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:45,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:45,366 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:09:45,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:45,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537907217] [2024-11-27 20:09:45,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537907217] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:09:45,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428252804] [2024-11-27 20:09:45,367 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:45,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:09:45,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:09:45,370 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:09:45,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-27 20:09:45,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:45,452 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-27 20:09:45,457 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:09:45,679 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:09:45,679 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:09:45,778 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 [2024-11-27 20:09:46,030 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:09:46,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428252804] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:09:46,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:09:46,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2024-11-27 20:09:46,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559929655] [2024-11-27 20:09:46,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:09:46,032 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-27 20:09:46,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:46,034 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-27 20:09:46,034 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2024-11-27 20:09:46,461 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2024-11-27 20:09:46,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 35 transitions, 161 flow. Second operand has 16 states, 16 states have (on average 13.5625) internal successors, (217), 16 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:46,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:09:46,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2024-11-27 20:09:46,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:09:46,949 INFO L124 PetriNetUnfolderBase]: 514/910 cut-off events. [2024-11-27 20:09:46,950 INFO L125 PetriNetUnfolderBase]: For 690/690 co-relation queries the response was YES. [2024-11-27 20:09:46,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2468 conditions, 910 events. 514/910 cut-off events. For 690/690 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3932 event pairs, 288 based on Foata normal form. 16/862 useless extension candidates. Maximal degree in co-relation 2087. Up to 431 conditions per place. [2024-11-27 20:09:46,958 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 60 selfloop transitions, 10 changer transitions 0/71 dead transitions. [2024-11-27 20:09:46,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 71 transitions, 422 flow [2024-11-27 20:09:46,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 20:09:46,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-27 20:09:46,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-11-27 20:09:46,961 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5067567567567568 [2024-11-27 20:09:46,961 INFO L175 Difference]: Start difference. First operand has 47 places, 35 transitions, 161 flow. Second operand 8 states and 150 transitions. [2024-11-27 20:09:46,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 71 transitions, 422 flow [2024-11-27 20:09:46,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 71 transitions, 402 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-27 20:09:46,966 INFO L231 Difference]: Finished difference. Result has 52 places, 37 transitions, 184 flow [2024-11-27 20:09:46,969 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=184, PETRI_PLACES=52, PETRI_TRANSITIONS=37} [2024-11-27 20:09:46,970 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 14 predicate places. [2024-11-27 20:09:46,970 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 37 transitions, 184 flow [2024-11-27 20:09:46,970 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 13.5625) internal successors, (217), 16 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:46,971 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:46,971 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:46,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-27 20:09:47,171 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-27 20:09:47,172 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:09:47,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:47,173 INFO L85 PathProgramCache]: Analyzing trace with hash -364404660, now seen corresponding path program 1 times [2024-11-27 20:09:47,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:47,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746805887] [2024-11-27 20:09:47,173 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:47,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:47,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:47,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:09:47,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:47,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746805887] [2024-11-27 20:09:47,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746805887] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:09:47,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:09:47,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 20:09:47,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517034457] [2024-11-27 20:09:47,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:09:47,250 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 20:09:47,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:47,250 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 20:09:47,251 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 20:09:47,261 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-27 20:09:47,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 37 transitions, 184 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:47,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:09:47,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-27 20:09:47,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:09:47,436 INFO L124 PetriNetUnfolderBase]: 491/883 cut-off events. [2024-11-27 20:09:47,436 INFO L125 PetriNetUnfolderBase]: For 782/782 co-relation queries the response was YES. [2024-11-27 20:09:47,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2473 conditions, 883 events. 491/883 cut-off events. For 782/782 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3864 event pairs, 144 based on Foata normal form. 2/885 useless extension candidates. Maximal degree in co-relation 2090. Up to 679 conditions per place. [2024-11-27 20:09:47,443 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 44 selfloop transitions, 5 changer transitions 1/52 dead transitions. [2024-11-27 20:09:47,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 52 transitions, 344 flow [2024-11-27 20:09:47,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 20:09:47,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 20:09:47,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2024-11-27 20:09:47,444 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6936936936936937 [2024-11-27 20:09:47,444 INFO L175 Difference]: Start difference. First operand has 52 places, 37 transitions, 184 flow. Second operand 3 states and 77 transitions. [2024-11-27 20:09:47,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 52 transitions, 344 flow [2024-11-27 20:09:47,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 52 transitions, 328 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-11-27 20:09:47,449 INFO L231 Difference]: Finished difference. Result has 50 places, 41 transitions, 224 flow [2024-11-27 20:09:47,449 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=224, PETRI_PLACES=50, PETRI_TRANSITIONS=41} [2024-11-27 20:09:47,450 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 12 predicate places. [2024-11-27 20:09:47,450 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 41 transitions, 224 flow [2024-11-27 20:09:47,450 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:47,450 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:47,451 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:47,451 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-27 20:09:47,451 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:09:47,451 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:47,451 INFO L85 PathProgramCache]: Analyzing trace with hash -285728276, now seen corresponding path program 2 times [2024-11-27 20:09:47,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:47,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152913028] [2024-11-27 20:09:47,452 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:09:47,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:47,465 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-27 20:09:47,465 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:09:47,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-27 20:09:47,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:47,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152913028] [2024-11-27 20:09:47,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152913028] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:09:47,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259381987] [2024-11-27 20:09:47,675 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:09:47,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:09:47,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:09:47,677 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:09:47,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-27 20:09:47,779 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-27 20:09:47,779 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:09:47,781 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-27 20:09:47,782 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:09:47,803 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 [2024-11-27 20:09:47,996 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-27 20:09:47,996 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:09:48,207 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-27 20:09:48,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259381987] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:09:48,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:09:48,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2024-11-27 20:09:48,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751297938] [2024-11-27 20:09:48,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:09:48,208 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-27 20:09:48,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:48,209 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-27 20:09:48,209 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-11-27 20:09:48,419 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2024-11-27 20:09:48,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 41 transitions, 224 flow. Second operand has 10 states, 10 states have (on average 15.1) internal successors, (151), 10 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:48,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:09:48,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2024-11-27 20:09:48,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:09:48,690 INFO L124 PetriNetUnfolderBase]: 491/867 cut-off events. [2024-11-27 20:09:48,690 INFO L125 PetriNetUnfolderBase]: For 898/898 co-relation queries the response was YES. [2024-11-27 20:09:48,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2525 conditions, 867 events. 491/867 cut-off events. For 898/898 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 3719 event pairs, 196 based on Foata normal form. 16/883 useless extension candidates. Maximal degree in co-relation 2139. Up to 448 conditions per place. [2024-11-27 20:09:48,697 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 43 selfloop transitions, 8 changer transitions 0/52 dead transitions. [2024-11-27 20:09:48,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 52 transitions, 389 flow [2024-11-27 20:09:48,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:09:48,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 20:09:48,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 83 transitions. [2024-11-27 20:09:48,698 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4486486486486487 [2024-11-27 20:09:48,698 INFO L175 Difference]: Start difference. First operand has 50 places, 41 transitions, 224 flow. Second operand 5 states and 83 transitions. [2024-11-27 20:09:48,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 52 transitions, 389 flow [2024-11-27 20:09:48,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 52 transitions, 382 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-27 20:09:48,702 INFO L231 Difference]: Finished difference. Result has 52 places, 40 transitions, 229 flow [2024-11-27 20:09:48,703 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=229, PETRI_PLACES=52, PETRI_TRANSITIONS=40} [2024-11-27 20:09:48,703 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 14 predicate places. [2024-11-27 20:09:48,703 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 40 transitions, 229 flow [2024-11-27 20:09:48,703 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.1) internal successors, (151), 10 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:48,703 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:48,703 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:48,715 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-27 20:09:48,904 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-27 20:09:48,904 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:09:48,905 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:48,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1057053616, now seen corresponding path program 1 times [2024-11-27 20:09:48,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:48,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687580652] [2024-11-27 20:09:48,905 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:48,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:48,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:49,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:09:49,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:49,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687580652] [2024-11-27 20:09:49,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687580652] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:09:49,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:09:49,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-27 20:09:49,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283728208] [2024-11-27 20:09:49,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:09:49,043 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 20:09:49,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:49,044 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 20:09:49,044 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:09:49,044 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-27 20:09:49,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 40 transitions, 229 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:49,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:09:49,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-27 20:09:49,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:09:49,355 INFO L124 PetriNetUnfolderBase]: 613/1101 cut-off events. [2024-11-27 20:09:49,356 INFO L125 PetriNetUnfolderBase]: For 1523/1523 co-relation queries the response was YES. [2024-11-27 20:09:49,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3387 conditions, 1101 events. 613/1101 cut-off events. For 1523/1523 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5511 event pairs, 192 based on Foata normal form. 46/1147 useless extension candidates. Maximal degree in co-relation 2919. Up to 506 conditions per place. [2024-11-27 20:09:49,363 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 77 selfloop transitions, 15 changer transitions 0/93 dead transitions. [2024-11-27 20:09:49,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 93 transitions, 698 flow [2024-11-27 20:09:49,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:09:49,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-27 20:09:49,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-11-27 20:09:49,365 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6621621621621622 [2024-11-27 20:09:49,365 INFO L175 Difference]: Start difference. First operand has 52 places, 40 transitions, 229 flow. Second operand 6 states and 147 transitions. [2024-11-27 20:09:49,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 93 transitions, 698 flow [2024-11-27 20:09:49,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 93 transitions, 658 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-27 20:09:49,371 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 362 flow [2024-11-27 20:09:49,371 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=362, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2024-11-27 20:09:49,371 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 19 predicate places. [2024-11-27 20:09:49,371 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 362 flow [2024-11-27 20:09:49,372 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:49,372 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:49,372 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:49,372 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-27 20:09:49,372 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:09:49,372 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:49,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1103216698, now seen corresponding path program 2 times [2024-11-27 20:09:49,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:49,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510664157] [2024-11-27 20:09:49,373 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:09:49,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:49,392 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:09:49,392 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:09:49,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:09:49,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:49,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510664157] [2024-11-27 20:09:49,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510664157] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:09:49,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349448082] [2024-11-27 20:09:49,756 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:09:49,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:09:49,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:09:49,759 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:09:49,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-27 20:09:49,843 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:09:49,844 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:09:49,845 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-27 20:09:49,846 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:09:49,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:09:49,918 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:09:49,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:09:49,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349448082] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 20:09:49,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:09:49,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8, 5] total 12 [2024-11-27 20:09:49,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894971597] [2024-11-27 20:09:49,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:09:49,984 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:09:49,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:49,984 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:09:49,984 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-11-27 20:09:49,985 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-27 20:09:49,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 362 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:49,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:09:49,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-27 20:09:49,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:09:50,208 INFO L124 PetriNetUnfolderBase]: 633/1135 cut-off events. [2024-11-27 20:09:50,208 INFO L125 PetriNetUnfolderBase]: For 2404/2404 co-relation queries the response was YES. [2024-11-27 20:09:50,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4107 conditions, 1135 events. 633/1135 cut-off events. For 2404/2404 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 5429 event pairs, 123 based on Foata normal form. 14/1149 useless extension candidates. Maximal degree in co-relation 3589. Up to 710 conditions per place. [2024-11-27 20:09:50,216 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 56 selfloop transitions, 18 changer transitions 1/76 dead transitions. [2024-11-27 20:09:50,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 76 transitions, 666 flow [2024-11-27 20:09:50,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 20:09:50,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 20:09:50,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-11-27 20:09:50,218 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6486486486486487 [2024-11-27 20:09:50,218 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 362 flow. Second operand 4 states and 96 transitions. [2024-11-27 20:09:50,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 76 transitions, 666 flow [2024-11-27 20:09:50,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 76 transitions, 631 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-27 20:09:50,226 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 451 flow [2024-11-27 20:09:50,227 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=451, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2024-11-27 20:09:50,227 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 23 predicate places. [2024-11-27 20:09:50,227 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 451 flow [2024-11-27 20:09:50,228 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:50,228 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:50,228 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:50,237 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-27 20:09:50,428 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:09:50,429 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:09:50,429 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:50,429 INFO L85 PathProgramCache]: Analyzing trace with hash 880065340, now seen corresponding path program 3 times [2024-11-27 20:09:50,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:50,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686098166] [2024-11-27 20:09:50,430 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 20:09:50,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:50,447 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 20:09:50,448 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:09:50,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:09:50,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:50,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686098166] [2024-11-27 20:09:50,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686098166] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:09:50,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122195873] [2024-11-27 20:09:50,712 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 20:09:50,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:09:50,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:09:50,715 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:09:50,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-27 20:09:50,798 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 20:09:50,798 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:09:50,799 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-27 20:09:50,800 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:09:51,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:09:51,780 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:09:51,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122195873] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:09:51,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:09:51,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 10 [2024-11-27 20:09:51,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761598992] [2024-11-27 20:09:51,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:09:51,780 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:09:51,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:51,781 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:09:51,781 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-27 20:09:51,781 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-27 20:09:51,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 451 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:51,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:09:51,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-27 20:09:51,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:09:52,191 INFO L124 PetriNetUnfolderBase]: 635/1127 cut-off events. [2024-11-27 20:09:52,191 INFO L125 PetriNetUnfolderBase]: For 3685/3685 co-relation queries the response was YES. [2024-11-27 20:09:52,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4574 conditions, 1127 events. 635/1127 cut-off events. For 3685/3685 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 5541 event pairs, 192 based on Foata normal form. 22/1149 useless extension candidates. Maximal degree in co-relation 4026. Up to 614 conditions per place. [2024-11-27 20:09:52,200 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 77 selfloop transitions, 19 changer transitions 8/105 dead transitions. [2024-11-27 20:09:52,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 105 transitions, 1019 flow [2024-11-27 20:09:52,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:09:52,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-27 20:09:52,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-11-27 20:09:52,202 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6486486486486487 [2024-11-27 20:09:52,202 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 451 flow. Second operand 6 states and 144 transitions. [2024-11-27 20:09:52,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 105 transitions, 1019 flow [2024-11-27 20:09:52,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 105 transitions, 989 flow, removed 15 selfloop flow, removed 0 redundant places. [2024-11-27 20:09:52,213 INFO L231 Difference]: Finished difference. Result has 70 places, 64 transitions, 616 flow [2024-11-27 20:09:52,213 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=441, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=616, PETRI_PLACES=70, PETRI_TRANSITIONS=64} [2024-11-27 20:09:52,214 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 32 predicate places. [2024-11-27 20:09:52,214 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 64 transitions, 616 flow [2024-11-27 20:09:52,214 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:52,214 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:52,214 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:52,224 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-27 20:09:52,418 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:09:52,419 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:09:52,419 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:52,419 INFO L85 PathProgramCache]: Analyzing trace with hash -262302972, now seen corresponding path program 4 times [2024-11-27 20:09:52,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:52,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823473375] [2024-11-27 20:09:52,420 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 20:09:52,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:52,440 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 20:09:52,440 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:09:52,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:09:52,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:52,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823473375] [2024-11-27 20:09:52,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823473375] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:09:52,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831274845] [2024-11-27 20:09:52,554 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 20:09:52,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:09:52,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:09:52,556 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:09:52,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-27 20:09:52,639 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 20:09:52,639 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:09:52,640 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-27 20:09:52,641 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:09:52,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:09:52,686 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:09:52,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:09:52,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831274845] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:09:52,758 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:09:52,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2024-11-27 20:09:52,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010356226] [2024-11-27 20:09:52,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:09:52,758 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-27 20:09:52,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:52,760 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-27 20:09:52,760 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-27 20:09:52,760 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-27 20:09:52,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 64 transitions, 616 flow. Second operand has 10 states, 10 states have (on average 16.6) internal successors, (166), 10 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:52,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:09:52,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-27 20:09:52,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:09:53,209 INFO L124 PetriNetUnfolderBase]: 673/1227 cut-off events. [2024-11-27 20:09:53,209 INFO L125 PetriNetUnfolderBase]: For 4659/4659 co-relation queries the response was YES. [2024-11-27 20:09:53,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5341 conditions, 1227 events. 673/1227 cut-off events. For 4659/4659 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 6109 event pairs, 190 based on Foata normal form. 40/1267 useless extension candidates. Maximal degree in co-relation 4438. Up to 638 conditions per place. [2024-11-27 20:09:53,221 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 83 selfloop transitions, 40 changer transitions 5/129 dead transitions. [2024-11-27 20:09:53,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 129 transitions, 1329 flow [2024-11-27 20:09:53,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-27 20:09:53,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-27 20:09:53,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-11-27 20:09:53,224 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6006006006006006 [2024-11-27 20:09:53,224 INFO L175 Difference]: Start difference. First operand has 70 places, 64 transitions, 616 flow. Second operand 9 states and 200 transitions. [2024-11-27 20:09:53,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 129 transitions, 1329 flow [2024-11-27 20:09:53,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 129 transitions, 1303 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-11-27 20:09:53,238 INFO L231 Difference]: Finished difference. Result has 83 places, 81 transitions, 959 flow [2024-11-27 20:09:53,239 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=577, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=959, PETRI_PLACES=83, PETRI_TRANSITIONS=81} [2024-11-27 20:09:53,239 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 45 predicate places. [2024-11-27 20:09:53,240 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 81 transitions, 959 flow [2024-11-27 20:09:53,240 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 16.6) internal successors, (166), 10 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:53,241 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:53,241 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:09:53,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-27 20:09:53,444 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:09:53,445 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:09:53,445 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:53,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1540419072, now seen corresponding path program 5 times [2024-11-27 20:09:53,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:53,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813931535] [2024-11-27 20:09:53,446 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 20:09:53,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:53,463 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:09:53,464 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:09:53,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:09:53,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:53,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813931535] [2024-11-27 20:09:53,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813931535] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:09:53,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:09:53,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 20:09:53,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347702076] [2024-11-27 20:09:53,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:09:53,544 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:09:53,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:53,544 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:09:53,544 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:09:53,544 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-27 20:09:53,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 81 transitions, 959 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:53,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:09:53,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-27 20:09:53,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:09:53,913 INFO L124 PetriNetUnfolderBase]: 651/1149 cut-off events. [2024-11-27 20:09:53,913 INFO L125 PetriNetUnfolderBase]: For 7797/7797 co-relation queries the response was YES. [2024-11-27 20:09:53,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6070 conditions, 1149 events. 651/1149 cut-off events. For 7797/7797 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5511 event pairs, 132 based on Foata normal form. 4/1153 useless extension candidates. Maximal degree in co-relation 5082. Up to 494 conditions per place. [2024-11-27 20:09:53,931 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 80 selfloop transitions, 30 changer transitions 8/119 dead transitions. [2024-11-27 20:09:53,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 119 transitions, 1558 flow [2024-11-27 20:09:53,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:09:53,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-27 20:09:53,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-11-27 20:09:53,933 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5990990990990991 [2024-11-27 20:09:53,933 INFO L175 Difference]: Start difference. First operand has 83 places, 81 transitions, 959 flow. Second operand 6 states and 133 transitions. [2024-11-27 20:09:53,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 119 transitions, 1558 flow [2024-11-27 20:09:53,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 119 transitions, 1468 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-11-27 20:09:53,961 INFO L231 Difference]: Finished difference. Result has 87 places, 89 transitions, 1104 flow [2024-11-27 20:09:53,961 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=893, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1104, PETRI_PLACES=87, PETRI_TRANSITIONS=89} [2024-11-27 20:09:53,962 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 49 predicate places. [2024-11-27 20:09:53,962 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 89 transitions, 1104 flow [2024-11-27 20:09:53,962 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:53,962 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:53,962 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] [2024-11-27 20:09:53,962 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-27 20:09:53,963 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:09:53,963 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:53,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1464416813, now seen corresponding path program 1 times [2024-11-27 20:09:53,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:53,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421292114] [2024-11-27 20:09:53,965 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:53,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:53,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:54,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:09:54,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:54,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421292114] [2024-11-27 20:09:54,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421292114] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:09:54,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:09:54,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 20:09:54,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404683234] [2024-11-27 20:09:54,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:09:54,063 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:09:54,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:54,064 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:09:54,064 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-27 20:09:54,064 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-27 20:09:54,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 89 transitions, 1104 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:54,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:09:54,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-27 20:09:54,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:09:54,328 INFO L124 PetriNetUnfolderBase]: 663/1145 cut-off events. [2024-11-27 20:09:54,328 INFO L125 PetriNetUnfolderBase]: For 8334/8334 co-relation queries the response was YES. [2024-11-27 20:09:54,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6287 conditions, 1145 events. 663/1145 cut-off events. For 8334/8334 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 5252 event pairs, 94 based on Foata normal form. 24/1169 useless extension candidates. Maximal degree in co-relation 5898. Up to 888 conditions per place. [2024-11-27 20:09:54,340 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 94 selfloop transitions, 12 changer transitions 2/109 dead transitions. [2024-11-27 20:09:54,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 109 transitions, 1509 flow [2024-11-27 20:09:54,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 20:09:54,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 20:09:54,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 95 transitions. [2024-11-27 20:09:54,341 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6418918918918919 [2024-11-27 20:09:54,341 INFO L175 Difference]: Start difference. First operand has 87 places, 89 transitions, 1104 flow. Second operand 4 states and 95 transitions. [2024-11-27 20:09:54,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 109 transitions, 1509 flow [2024-11-27 20:09:54,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 109 transitions, 1491 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-11-27 20:09:54,366 INFO L231 Difference]: Finished difference. Result has 90 places, 92 transitions, 1177 flow [2024-11-27 20:09:54,366 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1073, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1177, PETRI_PLACES=90, PETRI_TRANSITIONS=92} [2024-11-27 20:09:54,367 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 52 predicate places. [2024-11-27 20:09:54,367 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 92 transitions, 1177 flow [2024-11-27 20:09:54,367 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:54,367 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:09:54,367 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] [2024-11-27 20:09:54,367 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-27 20:09:54,367 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:09:54,368 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:09:54,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1538185563, now seen corresponding path program 1 times [2024-11-27 20:09:54,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:09:54,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262219219] [2024-11-27 20:09:54,368 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:54,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:09:54,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:55,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:09:55,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:09:55,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262219219] [2024-11-27 20:09:55,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262219219] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:09:55,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267620109] [2024-11-27 20:09:55,031 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:09:55,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:09:55,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:09:55,036 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:09:55,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-27 20:09:55,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:09:55,124 INFO L256 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-27 20:09:55,130 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:09:55,179 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 [2024-11-27 20:09:55,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:09:55,480 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:09:56,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 64 [2024-11-27 20:09:56,157 INFO L349 Elim1Store]: treesize reduction 5, result has 80.0 percent of original size [2024-11-27 20:09:56,157 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 108 treesize of output 91 [2024-11-27 20:09:56,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:09:56,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267620109] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:09:56,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:09:56,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 25 [2024-11-27 20:09:56,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095069014] [2024-11-27 20:09:56,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:09:56,976 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-27 20:09:56,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:09:56,977 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-27 20:09:56,977 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2024-11-27 20:09:58,128 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-27 20:09:58,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 92 transitions, 1177 flow. Second operand has 25 states, 25 states have (on average 16.52) internal successors, (413), 25 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:09:58,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:09:58,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-27 20:09:58,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:10:03,510 INFO L124 PetriNetUnfolderBase]: 1165/2021 cut-off events. [2024-11-27 20:10:03,511 INFO L125 PetriNetUnfolderBase]: For 14231/14231 co-relation queries the response was YES. [2024-11-27 20:10:03,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10723 conditions, 2021 events. 1165/2021 cut-off events. For 14231/14231 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 10396 event pairs, 65 based on Foata normal form. 9/2030 useless extension candidates. Maximal degree in co-relation 8714. Up to 423 conditions per place. [2024-11-27 20:10:03,528 INFO L140 encePairwiseOnDemand]: 22/37 looper letters, 133 selfloop transitions, 75 changer transitions 175/384 dead transitions. [2024-11-27 20:10:03,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 384 transitions, 4387 flow [2024-11-27 20:10:03,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-27 20:10:03,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2024-11-27 20:10:03,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 926 transitions. [2024-11-27 20:10:03,533 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5561561561561561 [2024-11-27 20:10:03,533 INFO L175 Difference]: Start difference. First operand has 90 places, 92 transitions, 1177 flow. Second operand 45 states and 926 transitions. [2024-11-27 20:10:03,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 384 transitions, 4387 flow [2024-11-27 20:10:03,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 384 transitions, 4371 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-27 20:10:03,581 INFO L231 Difference]: Finished difference. Result has 143 places, 111 transitions, 1405 flow [2024-11-27 20:10:03,581 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1169, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1405, PETRI_PLACES=143, PETRI_TRANSITIONS=111} [2024-11-27 20:10:03,581 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 105 predicate places. [2024-11-27 20:10:03,582 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 111 transitions, 1405 flow [2024-11-27 20:10:03,583 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 16.52) internal successors, (413), 25 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:10:03,583 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:10:03,583 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:10:03,596 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-27 20:10:03,784 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:03,784 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:10:03,784 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:10:03,784 INFO L85 PathProgramCache]: Analyzing trace with hash -2117076909, now seen corresponding path program 2 times [2024-11-27 20:10:03,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:10:03,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684847696] [2024-11-27 20:10:03,785 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:10:03,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:10:03,814 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:10:03,814 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:10:04,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 20:10:04,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:10:04,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684847696] [2024-11-27 20:10:04,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684847696] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:10:04,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369183920] [2024-11-27 20:10:04,008 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:10:04,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:10:04,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:10:04,010 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:10:04,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-27 20:10:04,097 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:10:04,097 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:10:04,099 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-27 20:10:04,103 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:10:04,156 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 [2024-11-27 20:10:04,210 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 [2024-11-27 20:10:04,503 INFO L349 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2024-11-27 20:10:04,503 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 40 [2024-11-27 20:10:04,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:10:04,547 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:10:05,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 250 treesize of output 230 [2024-11-27 20:10:05,627 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:10:05,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 5292 treesize of output 3728 [2024-11-27 20:15:23,389 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) stderr output: (error "out of memory") [2024-11-27 20:15:23,389 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 101 [2024-11-27 20:15:23,390 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2024-11-27 20:15:23,401 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-27 20:15:23,590 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:15:23,591 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:277) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.checkRedundancy(SimplifyDDA2.java:275) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convertForPreprocessedInputTerms(SimplifyDDA2.java:499) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:484) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.simplify(SimplifyDDA2.java:590) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:245) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:318) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify(QuantifierPusher.java:728) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:189) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:283) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:51) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:234) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:416) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:395) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:267) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:325) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:181) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:160) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:106) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:317) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:428) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:314) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:238) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:132) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1518) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:701) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:258) ... 69 more [2024-11-27 20:15:23,599 INFO L158 Benchmark]: Toolchain (without parser) took 352531.47ms. Allocated memory was 117.4MB in the beginning and 2.3GB in the end (delta: 2.2GB). Free memory was 94.3MB in the beginning and 1.8GB in the end (delta: -1.7GB). Peak memory consumption was 1.4GB. Max. memory is 16.1GB. [2024-11-27 20:15:23,600 INFO L158 Benchmark]: CDTParser took 0.64ms. Allocated memory is still 167.8MB. Free memory is still 103.5MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-27 20:15:23,600 INFO L158 Benchmark]: CACSL2BoogieTranslator took 305.60ms. Allocated memory is still 117.4MB. Free memory was 94.3MB in the beginning and 82.4MB in the end (delta: 11.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-27 20:15:23,601 INFO L158 Benchmark]: Boogie Procedure Inliner took 69.42ms. Allocated memory is still 117.4MB. Free memory was 82.4MB in the beginning and 80.5MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-27 20:15:23,601 INFO L158 Benchmark]: Boogie Preprocessor took 76.05ms. Allocated memory is still 117.4MB. Free memory was 80.5MB in the beginning and 78.6MB in the end (delta: 2.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-27 20:15:23,602 INFO L158 Benchmark]: RCFGBuilder took 929.93ms. Allocated memory is still 117.4MB. Free memory was 78.6MB in the beginning and 88.1MB in the end (delta: -9.5MB). Peak memory consumption was 49.4MB. Max. memory is 16.1GB. [2024-11-27 20:15:23,602 INFO L158 Benchmark]: TraceAbstraction took 351143.79ms. Allocated memory was 117.4MB in the beginning and 2.3GB in the end (delta: 2.2GB). Free memory was 87.5MB in the beginning and 1.8GB in the end (delta: -1.7GB). Peak memory consumption was 1.4GB. Max. memory is 16.1GB. [2024-11-27 20:15:23,605 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.64ms. Allocated memory is still 167.8MB. Free memory is still 103.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 305.60ms. Allocated memory is still 117.4MB. Free memory was 94.3MB in the beginning and 82.4MB in the end (delta: 11.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 69.42ms. Allocated memory is still 117.4MB. Free memory was 82.4MB in the beginning and 80.5MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 76.05ms. Allocated memory is still 117.4MB. Free memory was 80.5MB in the beginning and 78.6MB in the end (delta: 2.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * RCFGBuilder took 929.93ms. Allocated memory is still 117.4MB. Free memory was 78.6MB in the beginning and 88.1MB in the end (delta: -9.5MB). Peak memory consumption was 49.4MB. Max. memory is 16.1GB. * TraceAbstraction took 351143.79ms. Allocated memory was 117.4MB in the beginning and 2.3GB in the end (delta: 2.2GB). Free memory was 87.5MB in the beginning and 1.8GB in the end (delta: -1.7GB). Peak memory consumption was 1.4GB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/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_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/unroll-3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/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 a4cca88acec68e5dbb90cd5700ef248bb5273dc097847f9475a683bfbdc7b189 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 20:15:26,524 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 20:15:26,708 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-11-27 20:15:26,717 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 20:15:26,717 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 20:15:26,760 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 20:15:26,761 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 20:15:26,762 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 20:15:26,762 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 20:15:26,763 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 20:15:26,764 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 20:15:26,764 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 20:15:26,764 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 20:15:26,765 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 20:15:26,766 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 20:15:26,766 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 20:15:26,766 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 20:15:26,766 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-27 20:15:26,766 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 20:15:26,766 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 20:15:26,766 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-27 20:15:26,766 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-27 20:15:26,767 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-27 20:15:26,767 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 20:15:26,767 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-27 20:15:26,767 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-27 20:15:26,767 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-27 20:15:26,767 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-27 20:15:26,767 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 20:15:26,767 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 20:15:26,767 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 20:15:26,767 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 20:15:26,767 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 20:15:26,768 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 20:15:26,768 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 20:15:26,768 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:15:26,768 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 20:15:26,768 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 20:15:26,768 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 20:15:26,768 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 20:15:26,768 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:15:26,768 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 20:15:26,768 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 20:15:26,768 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-11-27 20:15:26,769 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-27 20:15:26,769 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 20:15:26,769 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 20:15:26,769 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 20:15:26,769 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 20:15:26,769 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_91625859-8996-483c-9e95-ff13adacd1b5/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 -> a4cca88acec68e5dbb90cd5700ef248bb5273dc097847f9475a683bfbdc7b189 [2024-11-27 20:15:27,196 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 20:15:27,206 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 20:15:27,210 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 20:15:27,212 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 20:15:27,213 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 20:15:27,215 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/unroll-3.wvr.c [2024-11-27 20:15:30,233 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/data/bb42d94d3/d72f18756a8141eab456db8bc8f604b9/FLAG9de1619a9 [2024-11-27 20:15:30,622 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 20:15:30,623 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/sv-benchmarks/c/weaver/unroll-3.wvr.c [2024-11-27 20:15:30,637 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/data/bb42d94d3/d72f18756a8141eab456db8bc8f604b9/FLAG9de1619a9 [2024-11-27 20:15:30,874 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/data/bb42d94d3/d72f18756a8141eab456db8bc8f604b9 [2024-11-27 20:15:30,878 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 20:15:30,880 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 20:15:30,882 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 20:15:30,883 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 20:15:30,889 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 20:15:30,893 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 08:15:30" (1/1) ... [2024-11-27 20:15:30,894 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@122cfdfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:15:30, skipping insertion in model container [2024-11-27 20:15:30,894 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 08:15:30" (1/1) ... [2024-11-27 20:15:30,920 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 20:15:31,166 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-27 20:15:31,170 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 20:15:31,190 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 20:15:31,225 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 20:15:31,250 INFO L204 MainTranslator]: Completed translation [2024-11-27 20:15:31,251 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:15:31 WrapperNode [2024-11-27 20:15:31,251 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 20:15:31,253 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 20:15:31,253 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 20:15:31,253 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 20:15:31,262 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:15:31" (1/1) ... [2024-11-27 20:15:31,273 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:15:31" (1/1) ... [2024-11-27 20:15:31,310 INFO L138 Inliner]: procedures = 25, calls = 25, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 134 [2024-11-27 20:15:31,310 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 20:15:31,315 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 20:15:31,316 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 20:15:31,316 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 20:15:31,325 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:15:31" (1/1) ... [2024-11-27 20:15:31,325 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:15:31" (1/1) ... [2024-11-27 20:15:31,329 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:15:31" (1/1) ... [2024-11-27 20:15:31,349 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-27 20:15:31,353 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:15:31" (1/1) ... [2024-11-27 20:15:31,354 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:15:31" (1/1) ... [2024-11-27 20:15:31,370 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:15:31" (1/1) ... [2024-11-27 20:15:31,375 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:15:31" (1/1) ... [2024-11-27 20:15:31,379 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:15:31" (1/1) ... [2024-11-27 20:15:31,385 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:15:31" (1/1) ... [2024-11-27 20:15:31,389 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:15:31" (1/1) ... [2024-11-27 20:15:31,392 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 20:15:31,400 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 20:15:31,400 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 20:15:31,401 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 20:15:31,402 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:15:31" (1/1) ... [2024-11-27 20:15:31,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:15:31,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:15:31,450 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 20:15:31,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 20:15:31,490 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 20:15:31,490 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-27 20:15:31,490 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-27 20:15:31,490 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-27 20:15:31,491 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-27 20:15:31,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-27 20:15:31,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-11-27 20:15:31,491 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-27 20:15:31,491 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-11-27 20:15:31,492 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-11-27 20:15:31,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 20:15:31,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 20:15:31,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-11-27 20:15:31,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-11-27 20:15:31,495 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-27 20:15:31,621 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 20:15:31,623 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 20:15:32,151 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-27 20:15:32,151 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 20:15:32,613 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 20:15:32,613 INFO L312 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-27 20:15:32,614 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 08:15:32 BoogieIcfgContainer [2024-11-27 20:15:32,614 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 20:15:32,620 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 20:15:32,620 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 20:15:32,626 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 20:15:32,626 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 08:15:30" (1/3) ... [2024-11-27 20:15:32,627 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34fadf9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 08:15:32, skipping insertion in model container [2024-11-27 20:15:32,628 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:15:31" (2/3) ... [2024-11-27 20:15:32,628 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34fadf9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 08:15:32, skipping insertion in model container [2024-11-27 20:15:32,630 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 08:15:32" (3/3) ... [2024-11-27 20:15:32,631 INFO L128 eAbstractionObserver]: Analyzing ICFG unroll-3.wvr.c [2024-11-27 20:15:32,649 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 20:15:32,651 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG unroll-3.wvr.c that has 3 procedures, 35 locations, 1 initial locations, 3 loop locations, and 12 error locations. [2024-11-27 20:15:32,652 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-27 20:15:32,742 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-27 20:15:32,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 37 transitions, 88 flow [2024-11-27 20:15:32,826 INFO L124 PetriNetUnfolderBase]: 3/35 cut-off events. [2024-11-27 20:15:32,828 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-27 20:15:32,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 35 events. 3/35 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 59 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2024-11-27 20:15:32,832 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 37 transitions, 88 flow [2024-11-27 20:15:32,836 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 34 transitions, 80 flow [2024-11-27 20:15:32,845 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 20:15:32,860 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;@b2fea22, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 20:15:32,862 INFO L334 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2024-11-27 20:15:32,867 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-27 20:15:32,868 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-27 20:15:32,868 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-27 20:15:32,868 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:15:32,869 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-27 20:15:32,870 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:15:32,878 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:15:32,880 INFO L85 PathProgramCache]: Analyzing trace with hash 475559, now seen corresponding path program 1 times [2024-11-27 20:15:32,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:15:32,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1290636934] [2024-11-27 20:15:32,890 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:15:32,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:15:32,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:15:32,893 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:15:32,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-27 20:15:32,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:15:32,985 INFO L256 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-27 20:15:32,990 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:15:33,050 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 7 [2024-11-27 20:15:33,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:15:33,077 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:15:33,077 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:15:33,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290636934] [2024-11-27 20:15:33,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290636934] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:15:33,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:15:33,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-27 20:15:33,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220232838] [2024-11-27 20:15:33,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:15:33,090 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 20:15:33,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:15:33,125 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 20:15:33,125 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 20:15:33,167 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-11-27 20:15:33,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:15:33,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:15:33,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-11-27 20:15:33,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:15:33,411 INFO L124 PetriNetUnfolderBase]: 88/211 cut-off events. [2024-11-27 20:15:33,411 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-11-27 20:15:33,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 387 conditions, 211 events. 88/211 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 872 event pairs, 64 based on Foata normal form. 1/161 useless extension candidates. Maximal degree in co-relation 332. Up to 153 conditions per place. [2024-11-27 20:15:33,419 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 19 selfloop transitions, 2 changer transitions 0/31 dead transitions. [2024-11-27 20:15:33,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 31 transitions, 116 flow [2024-11-27 20:15:33,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 20:15:33,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 20:15:33,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 62 transitions. [2024-11-27 20:15:33,437 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5585585585585585 [2024-11-27 20:15:33,439 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 80 flow. Second operand 3 states and 62 transitions. [2024-11-27 20:15:33,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 31 transitions, 116 flow [2024-11-27 20:15:33,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 31 transitions, 108 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-27 20:15:33,455 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 70 flow [2024-11-27 20:15:33,458 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2024-11-27 20:15:33,462 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, -5 predicate places. [2024-11-27 20:15:33,462 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 70 flow [2024-11-27 20:15:33,463 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:15:33,463 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:15:33,464 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-27 20:15:33,475 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-27 20:15:33,667 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:15:33,668 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:15:33,668 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:15:33,668 INFO L85 PathProgramCache]: Analyzing trace with hash 475560, now seen corresponding path program 1 times [2024-11-27 20:15:33,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:15:33,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [530220456] [2024-11-27 20:15:33,669 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:15:33,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:15:33,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:15:33,672 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:15:33,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-27 20:15:33,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:15:33,742 INFO L256 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-27 20:15:33,743 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:15:33,801 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 7 [2024-11-27 20:15:33,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:15:33,923 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:15:33,923 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:15:33,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530220456] [2024-11-27 20:15:33,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530220456] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:15:33,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:15:33,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-27 20:15:33,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936636539] [2024-11-27 20:15:33,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:15:33,927 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 20:15:33,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:15:33,928 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 20:15:33,928 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 20:15:34,000 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-11-27 20:15:34,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:15:34,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:15:34,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-11-27 20:15:34,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:15:34,256 INFO L124 PetriNetUnfolderBase]: 89/214 cut-off events. [2024-11-27 20:15:34,256 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-27 20:15:34,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 384 conditions, 214 events. 89/214 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 878 event pairs, 64 based on Foata normal form. 0/163 useless extension candidates. Maximal degree in co-relation 362. Up to 158 conditions per place. [2024-11-27 20:15:34,260 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 22 selfloop transitions, 3 changer transitions 0/34 dead transitions. [2024-11-27 20:15:34,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 34 transitions, 128 flow [2024-11-27 20:15:34,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 20:15:34,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 20:15:34,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 65 transitions. [2024-11-27 20:15:34,265 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5855855855855856 [2024-11-27 20:15:34,265 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 70 flow. Second operand 3 states and 65 transitions. [2024-11-27 20:15:34,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 34 transitions, 128 flow [2024-11-27 20:15:34,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 34 transitions, 122 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-27 20:15:34,269 INFO L231 Difference]: Finished difference. Result has 34 places, 33 transitions, 85 flow [2024-11-27 20:15:34,269 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=85, PETRI_PLACES=34, PETRI_TRANSITIONS=33} [2024-11-27 20:15:34,270 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, -4 predicate places. [2024-11-27 20:15:34,271 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 33 transitions, 85 flow [2024-11-27 20:15:34,271 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:15:34,272 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:15:34,272 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-27 20:15:34,283 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-27 20:15:34,473 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:15:34,473 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:15:34,474 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:15:34,474 INFO L85 PathProgramCache]: Analyzing trace with hash 457027440, now seen corresponding path program 1 times [2024-11-27 20:15:34,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:15:34,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [640197965] [2024-11-27 20:15:34,474 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:15:34,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:15:34,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:15:34,476 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:15:34,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-27 20:15:34,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:15:34,548 INFO L256 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 20:15:34,550 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:15:34,567 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 7 [2024-11-27 20:15:34,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:15:34,741 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:15:35,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:15:35,056 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:15:35,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640197965] [2024-11-27 20:15:35,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640197965] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:15:35,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:15:35,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2024-11-27 20:15:35,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490429118] [2024-11-27 20:15:35,057 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:15:35,057 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-27 20:15:35,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:15:35,058 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-27 20:15:35,058 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-11-27 20:15:35,388 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-11-27 20:15:35,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 33 transitions, 85 flow. Second operand has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:15:35,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:15:35,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-11-27 20:15:35,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:15:36,200 INFO L124 PetriNetUnfolderBase]: 91/222 cut-off events. [2024-11-27 20:15:36,201 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-27 20:15:36,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 410 conditions, 222 events. 91/222 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 911 event pairs, 64 based on Foata normal form. 1/172 useless extension candidates. Maximal degree in co-relation 397. Up to 160 conditions per place. [2024-11-27 20:15:36,205 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 22 selfloop transitions, 11 changer transitions 0/42 dead transitions. [2024-11-27 20:15:36,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 42 transitions, 178 flow [2024-11-27 20:15:36,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-27 20:15:36,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-27 20:15:36,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-11-27 20:15:36,212 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4624624624624625 [2024-11-27 20:15:36,212 INFO L175 Difference]: Start difference. First operand has 34 places, 33 transitions, 85 flow. Second operand 9 states and 154 transitions. [2024-11-27 20:15:36,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 42 transitions, 178 flow [2024-11-27 20:15:36,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 176 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-27 20:15:36,217 INFO L231 Difference]: Finished difference. Result has 44 places, 42 transitions, 152 flow [2024-11-27 20:15:36,217 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=152, PETRI_PLACES=44, PETRI_TRANSITIONS=42} [2024-11-27 20:15:36,218 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 6 predicate places. [2024-11-27 20:15:36,220 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 42 transitions, 152 flow [2024-11-27 20:15:36,220 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:15:36,221 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:15:36,221 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:15:36,233 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-27 20:15:36,421 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:15:36,422 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:15:36,422 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:15:36,423 INFO L85 PathProgramCache]: Analyzing trace with hash 260967877, now seen corresponding path program 1 times [2024-11-27 20:15:36,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:15:36,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1177289393] [2024-11-27 20:15:36,423 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:15:36,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:15:36,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:15:36,426 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:15:36,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-27 20:15:36,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:15:36,514 INFO L256 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-27 20:15:36,516 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:15:36,524 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 7 [2024-11-27 20:15:36,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:15:36,567 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:15:36,567 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:15:36,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177289393] [2024-11-27 20:15:36,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177289393] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:15:36,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:15:36,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 20:15:36,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771293904] [2024-11-27 20:15:36,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:15:36,568 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:15:36,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:15:36,569 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:15:36,569 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 20:15:36,652 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 37 [2024-11-27 20:15:36,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 42 transitions, 152 flow. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:15:36,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:15:36,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 37 [2024-11-27 20:15:36,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:15:36,809 INFO L124 PetriNetUnfolderBase]: 91/195 cut-off events. [2024-11-27 20:15:36,810 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-11-27 20:15:36,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 405 conditions, 195 events. 91/195 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 665 event pairs, 64 based on Foata normal form. 0/172 useless extension candidates. Maximal degree in co-relation 374. Up to 155 conditions per place. [2024-11-27 20:15:36,812 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 27 selfloop transitions, 5 changer transitions 0/38 dead transitions. [2024-11-27 20:15:36,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 38 transitions, 208 flow [2024-11-27 20:15:36,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 20:15:36,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 20:15:36,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 61 transitions. [2024-11-27 20:15:36,814 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41216216216216217 [2024-11-27 20:15:36,814 INFO L175 Difference]: Start difference. First operand has 44 places, 42 transitions, 152 flow. Second operand 4 states and 61 transitions. [2024-11-27 20:15:36,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 38 transitions, 208 flow [2024-11-27 20:15:36,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 38 transitions, 194 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-27 20:15:36,817 INFO L231 Difference]: Finished difference. Result has 42 places, 38 transitions, 140 flow [2024-11-27 20:15:36,817 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=42, PETRI_TRANSITIONS=38} [2024-11-27 20:15:36,818 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 4 predicate places. [2024-11-27 20:15:36,818 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 38 transitions, 140 flow [2024-11-27 20:15:36,818 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:15:36,818 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:15:36,818 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:15:36,830 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-27 20:15:37,019 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:15:37,019 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:15:37,019 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:15:37,020 INFO L85 PathProgramCache]: Analyzing trace with hash 260967878, now seen corresponding path program 1 times [2024-11-27 20:15:37,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:15:37,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1445072288] [2024-11-27 20:15:37,020 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:15:37,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:15:37,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:15:37,023 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:15:37,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-27 20:15:37,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:15:37,106 INFO L256 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-27 20:15:37,108 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:15:37,138 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 7 [2024-11-27 20:15:37,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:15:37,535 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:15:38,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:15:38,050 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:15:38,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445072288] [2024-11-27 20:15:38,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445072288] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:15:38,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:15:38,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-11-27 20:15:38,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940834373] [2024-11-27 20:15:38,050 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:15:38,050 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-27 20:15:38,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:15:38,051 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-27 20:15:38,051 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-27 20:15:38,592 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2024-11-27 20:15:38,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 38 transitions, 140 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 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) [2024-11-27 20:15:38,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:15:38,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2024-11-27 20:15:38,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:15:39,472 INFO L124 PetriNetUnfolderBase]: 283/562 cut-off events. [2024-11-27 20:15:39,473 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-11-27 20:15:39,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1119 conditions, 562 events. 283/562 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2630 event pairs, 133 based on Foata normal form. 0/477 useless extension candidates. Maximal degree in co-relation 1008. Up to 217 conditions per place. [2024-11-27 20:15:39,477 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 56 selfloop transitions, 12 changer transitions 0/72 dead transitions. [2024-11-27 20:15:39,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 72 transitions, 352 flow [2024-11-27 20:15:39,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 20:15:39,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-27 20:15:39,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-11-27 20:15:39,480 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5574324324324325 [2024-11-27 20:15:39,480 INFO L175 Difference]: Start difference. First operand has 42 places, 38 transitions, 140 flow. Second operand 8 states and 165 transitions. [2024-11-27 20:15:39,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 72 transitions, 352 flow [2024-11-27 20:15:39,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 72 transitions, 346 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-27 20:15:39,485 INFO L231 Difference]: Finished difference. Result has 49 places, 40 transitions, 173 flow [2024-11-27 20:15:39,485 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=173, PETRI_PLACES=49, PETRI_TRANSITIONS=40} [2024-11-27 20:15:39,488 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 11 predicate places. [2024-11-27 20:15:39,488 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 40 transitions, 173 flow [2024-11-27 20:15:39,489 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 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) [2024-11-27 20:15:39,489 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:15:39,489 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:15:39,501 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-27 20:15:39,691 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:15:39,691 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:15:39,692 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:15:39,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1682043018, now seen corresponding path program 1 times [2024-11-27 20:15:39,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:15:39,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [337271204] [2024-11-27 20:15:39,692 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:15:39,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:15:39,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:15:39,694 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:15:39,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-27 20:15:39,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:15:39,770 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-27 20:15:39,772 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:15:39,795 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 7 [2024-11-27 20:15:40,184 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:15:40,185 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:15:41,219 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:15:41,220 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:15:41,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337271204] [2024-11-27 20:15:41,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337271204] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:15:41,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:15:41,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2024-11-27 20:15:41,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310057741] [2024-11-27 20:15:41,220 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:15:41,220 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-27 20:15:41,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:15:41,221 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-27 20:15:41,221 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-11-27 20:15:43,470 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2024-11-27 20:15:43,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 40 transitions, 173 flow. Second operand has 12 states, 12 states have (on average 13.666666666666666) internal successors, (164), 12 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:15:43,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:15:43,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2024-11-27 20:15:43,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:15:45,437 INFO L124 PetriNetUnfolderBase]: 415/835 cut-off events. [2024-11-27 20:15:45,437 INFO L125 PetriNetUnfolderBase]: For 104/104 co-relation queries the response was YES. [2024-11-27 20:15:45,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1767 conditions, 835 events. 415/835 cut-off events. For 104/104 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 4123 event pairs, 256 based on Foata normal form. 28/750 useless extension candidates. Maximal degree in co-relation 1279. Up to 201 conditions per place. [2024-11-27 20:15:45,443 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 72 selfloop transitions, 16 changer transitions 0/92 dead transitions. [2024-11-27 20:15:45,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 92 transitions, 467 flow [2024-11-27 20:15:45,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-27 20:15:45,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-27 20:15:45,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-11-27 20:15:45,447 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5594594594594594 [2024-11-27 20:15:45,447 INFO L175 Difference]: Start difference. First operand has 49 places, 40 transitions, 173 flow. Second operand 10 states and 207 transitions. [2024-11-27 20:15:45,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 92 transitions, 467 flow [2024-11-27 20:15:45,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 92 transitions, 459 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-27 20:15:45,451 INFO L231 Difference]: Finished difference. Result has 57 places, 44 transitions, 223 flow [2024-11-27 20:15:45,451 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=223, PETRI_PLACES=57, PETRI_TRANSITIONS=44} [2024-11-27 20:15:45,452 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 19 predicate places. [2024-11-27 20:15:45,452 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 44 transitions, 223 flow [2024-11-27 20:15:45,453 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.666666666666666) internal successors, (164), 12 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:15:45,453 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:15:45,453 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:15:45,465 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-27 20:15:45,653 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:15:45,654 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:15:45,654 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:15:45,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1659492384, now seen corresponding path program 1 times [2024-11-27 20:15:45,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:15:45,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1485774806] [2024-11-27 20:15:45,655 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:15:45,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:15:45,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:15:45,657 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:15:45,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-27 20:15:45,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:15:45,729 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-27 20:15:45,730 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:15:45,757 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 7 [2024-11-27 20:15:46,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:15:46,121 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:15:46,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:15:46,542 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:15:46,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485774806] [2024-11-27 20:15:46,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485774806] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:15:46,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:15:46,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-11-27 20:15:46,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805712134] [2024-11-27 20:15:46,543 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:15:46,543 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-27 20:15:46,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:15:46,544 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-27 20:15:46,544 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-27 20:15:46,976 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-11-27 20:15:46,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 223 flow. Second operand has 10 states, 10 states have (on average 12.0) internal successors, (120), 10 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:15:46,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:15:46,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-11-27 20:15:46,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:15:47,825 INFO L124 PetriNetUnfolderBase]: 710/1254 cut-off events. [2024-11-27 20:15:47,825 INFO L125 PetriNetUnfolderBase]: For 712/712 co-relation queries the response was YES. [2024-11-27 20:15:47,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3113 conditions, 1254 events. 710/1254 cut-off events. For 712/712 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 5973 event pairs, 259 based on Foata normal form. 0/1058 useless extension candidates. Maximal degree in co-relation 2561. Up to 885 conditions per place. [2024-11-27 20:15:47,832 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 62 selfloop transitions, 12 changer transitions 0/76 dead transitions. [2024-11-27 20:15:47,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 76 transitions, 471 flow [2024-11-27 20:15:47,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 20:15:47,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-27 20:15:47,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-11-27 20:15:47,834 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4966216216216216 [2024-11-27 20:15:47,835 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 223 flow. Second operand 8 states and 147 transitions. [2024-11-27 20:15:47,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 76 transitions, 471 flow [2024-11-27 20:15:47,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 76 transitions, 456 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-27 20:15:47,839 INFO L231 Difference]: Finished difference. Result has 62 places, 46 transitions, 247 flow [2024-11-27 20:15:47,840 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=247, PETRI_PLACES=62, PETRI_TRANSITIONS=46} [2024-11-27 20:15:47,840 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 24 predicate places. [2024-11-27 20:15:47,841 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 46 transitions, 247 flow [2024-11-27 20:15:47,841 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 10 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:15:47,841 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:15:47,841 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:15:47,851 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-27 20:15:48,045 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:15:48,046 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:15:48,046 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:15:48,047 INFO L85 PathProgramCache]: Analyzing trace with hash -95343153, now seen corresponding path program 1 times [2024-11-27 20:15:48,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:15:48,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [566834700] [2024-11-27 20:15:48,049 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:15:48,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:15:48,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:15:48,051 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:15:48,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-27 20:15:48,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:15:48,125 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-27 20:15:48,126 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:15:48,148 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 7 [2024-11-27 20:15:48,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:15:48,509 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:15:49,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:15:49,490 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:15:49,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566834700] [2024-11-27 20:15:49,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566834700] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:15:49,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:15:49,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2024-11-27 20:15:49,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321162787] [2024-11-27 20:15:49,490 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:15:49,490 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-27 20:15:49,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:15:49,491 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-27 20:15:49,491 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-11-27 20:15:50,616 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-11-27 20:15:50,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 46 transitions, 247 flow. Second operand has 12 states, 12 states have (on average 11.833333333333334) internal successors, (142), 12 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:15:50,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:15:50,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-11-27 20:15:50,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:15:52,519 INFO L124 PetriNetUnfolderBase]: 572/1020 cut-off events. [2024-11-27 20:15:52,520 INFO L125 PetriNetUnfolderBase]: For 566/566 co-relation queries the response was YES. [2024-11-27 20:15:52,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2648 conditions, 1020 events. 572/1020 cut-off events. For 566/566 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 4585 event pairs, 301 based on Foata normal form. 32/961 useless extension candidates. Maximal degree in co-relation 2085. Up to 221 conditions per place. [2024-11-27 20:15:52,530 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 74 selfloop transitions, 14 changer transitions 0/90 dead transitions. [2024-11-27 20:15:52,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 90 transitions, 553 flow [2024-11-27 20:15:52,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-27 20:15:52,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-27 20:15:52,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-11-27 20:15:52,535 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5054054054054054 [2024-11-27 20:15:52,535 INFO L175 Difference]: Start difference. First operand has 62 places, 46 transitions, 247 flow. Second operand 10 states and 187 transitions. [2024-11-27 20:15:52,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 90 transitions, 553 flow [2024-11-27 20:15:52,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 90 transitions, 540 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-27 20:15:52,546 INFO L231 Difference]: Finished difference. Result has 69 places, 50 transitions, 290 flow [2024-11-27 20:15:52,546 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=290, PETRI_PLACES=69, PETRI_TRANSITIONS=50} [2024-11-27 20:15:52,547 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 31 predicate places. [2024-11-27 20:15:52,548 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 50 transitions, 290 flow [2024-11-27 20:15:52,549 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.833333333333334) internal successors, (142), 12 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:15:52,549 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:15:52,549 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-11-27 20:15:52,560 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-27 20:15:52,749 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:15:52,750 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:15:52,750 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:15:52,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1818686264, now seen corresponding path program 2 times [2024-11-27 20:15:52,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:15:52,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [573301305] [2024-11-27 20:15:52,750 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:15:52,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:15:52,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:15:52,752 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:15:52,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-27 20:15:52,822 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:15:52,822 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:15:52,824 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-27 20:15:52,825 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:15:52,839 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 7 [2024-11-27 20:15:53,123 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:15:53,123 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:15:53,964 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:15:53,964 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:15:53,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573301305] [2024-11-27 20:15:53,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573301305] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:15:53,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:15:53,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2024-11-27 20:15:53,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952899906] [2024-11-27 20:15:53,964 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:15:53,965 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-27 20:15:53,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:15:53,965 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-27 20:15:53,965 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-11-27 20:15:55,011 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-11-27 20:15:55,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 50 transitions, 290 flow. Second operand has 14 states, 14 states have (on average 14.571428571428571) internal successors, (204), 14 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) [2024-11-27 20:15:55,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:15:55,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-11-27 20:15:55,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:15:58,464 INFO L124 PetriNetUnfolderBase]: 539/1005 cut-off events. [2024-11-27 20:15:58,464 INFO L125 PetriNetUnfolderBase]: For 680/680 co-relation queries the response was YES. [2024-11-27 20:15:58,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2877 conditions, 1005 events. 539/1005 cut-off events. For 680/680 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 4764 event pairs, 436 based on Foata normal form. 6/1011 useless extension candidates. Maximal degree in co-relation 2217. Up to 942 conditions per place. [2024-11-27 20:15:58,470 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 34 selfloop transitions, 29 changer transitions 0/68 dead transitions. [2024-11-27 20:15:58,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 68 transitions, 590 flow [2024-11-27 20:15:58,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-27 20:15:58,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-27 20:15:58,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 330 transitions. [2024-11-27 20:15:58,473 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4247104247104247 [2024-11-27 20:15:58,474 INFO L175 Difference]: Start difference. First operand has 69 places, 50 transitions, 290 flow. Second operand 21 states and 330 transitions. [2024-11-27 20:15:58,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 68 transitions, 590 flow [2024-11-27 20:15:58,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 68 transitions, 565 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-27 20:15:58,478 INFO L231 Difference]: Finished difference. Result has 91 places, 68 transitions, 527 flow [2024-11-27 20:15:58,479 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=527, PETRI_PLACES=91, PETRI_TRANSITIONS=68} [2024-11-27 20:15:58,479 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 53 predicate places. [2024-11-27 20:15:58,479 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 68 transitions, 527 flow [2024-11-27 20:15:58,479 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.571428571428571) internal successors, (204), 14 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) [2024-11-27 20:15:58,479 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:15:58,480 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2024-11-27 20:15:58,490 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-27 20:15:58,680 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:15:58,680 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:15:58,680 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:15:58,681 INFO L85 PathProgramCache]: Analyzing trace with hash 532779374, now seen corresponding path program 2 times [2024-11-27 20:15:58,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:15:58,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1158352456] [2024-11-27 20:15:58,681 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:15:58,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:15:58,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:15:58,683 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:15:58,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-27 20:15:58,745 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-27 20:15:58,745 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:15:58,747 INFO L256 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-27 20:15:58,748 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:15:58,773 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 7 [2024-11-27 20:15:59,178 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-27 20:15:59,179 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:15:59,179 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:15:59,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158352456] [2024-11-27 20:15:59,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158352456] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:15:59,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:15:59,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 20:15:59,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693096581] [2024-11-27 20:15:59,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:15:59,180 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:15:59,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:15:59,181 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:15:59,181 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 20:15:59,323 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-11-27 20:15:59,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 68 transitions, 527 flow. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:15:59,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:15:59,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-11-27 20:15:59,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:15:59,803 INFO L124 PetriNetUnfolderBase]: 625/1148 cut-off events. [2024-11-27 20:15:59,803 INFO L125 PetriNetUnfolderBase]: For 755/755 co-relation queries the response was YES. [2024-11-27 20:15:59,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3292 conditions, 1148 events. 625/1148 cut-off events. For 755/755 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 5622 event pairs, 258 based on Foata normal form. 14/1162 useless extension candidates. Maximal degree in co-relation 3220. Up to 545 conditions per place. [2024-11-27 20:15:59,812 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 72 selfloop transitions, 14 changer transitions 0/91 dead transitions. [2024-11-27 20:15:59,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 91 transitions, 782 flow [2024-11-27 20:15:59,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 20:15:59,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 20:15:59,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 90 transitions. [2024-11-27 20:15:59,813 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6081081081081081 [2024-11-27 20:15:59,813 INFO L175 Difference]: Start difference. First operand has 91 places, 68 transitions, 527 flow. Second operand 4 states and 90 transitions. [2024-11-27 20:15:59,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 91 transitions, 782 flow [2024-11-27 20:15:59,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 91 transitions, 694 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-11-27 20:15:59,825 INFO L231 Difference]: Finished difference. Result has 87 places, 69 transitions, 488 flow [2024-11-27 20:15:59,825 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=488, PETRI_PLACES=87, PETRI_TRANSITIONS=69} [2024-11-27 20:15:59,826 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 49 predicate places. [2024-11-27 20:15:59,827 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 69 transitions, 488 flow [2024-11-27 20:15:59,828 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:15:59,828 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:15:59,828 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:15:59,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-27 20:16:00,028 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:16:00,029 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:16:00,029 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:16:00,029 INFO L85 PathProgramCache]: Analyzing trace with hash -8431389, now seen corresponding path program 1 times [2024-11-27 20:16:00,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:16:00,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1018468691] [2024-11-27 20:16:00,029 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:16:00,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:16:00,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:16:00,031 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:16:00,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-27 20:16:00,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:16:00,097 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-27 20:16:00,098 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:16:00,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:16:00,169 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:16:00,169 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:16:00,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018468691] [2024-11-27 20:16:00,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018468691] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:16:00,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:16:00,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 20:16:00,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479279859] [2024-11-27 20:16:00,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:16:00,170 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 20:16:00,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:16:00,171 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 20:16:00,171 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 20:16:00,201 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-27 20:16:00,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 69 transitions, 488 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:16:00,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:16:00,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-27 20:16:00,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:16:00,463 INFO L124 PetriNetUnfolderBase]: 644/1210 cut-off events. [2024-11-27 20:16:00,463 INFO L125 PetriNetUnfolderBase]: For 990/990 co-relation queries the response was YES. [2024-11-27 20:16:00,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3580 conditions, 1210 events. 644/1210 cut-off events. For 990/990 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 5925 event pairs, 186 based on Foata normal form. 3/1213 useless extension candidates. Maximal degree in co-relation 3517. Up to 848 conditions per place. [2024-11-27 20:16:00,471 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 76 selfloop transitions, 7 changer transitions 1/90 dead transitions. [2024-11-27 20:16:00,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 90 transitions, 748 flow [2024-11-27 20:16:00,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 20:16:00,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 20:16:00,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2024-11-27 20:16:00,473 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6936936936936937 [2024-11-27 20:16:00,473 INFO L175 Difference]: Start difference. First operand has 87 places, 69 transitions, 488 flow. Second operand 3 states and 77 transitions. [2024-11-27 20:16:00,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 90 transitions, 748 flow [2024-11-27 20:16:00,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 90 transitions, 719 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-27 20:16:00,481 INFO L231 Difference]: Finished difference. Result has 86 places, 75 transitions, 537 flow [2024-11-27 20:16:00,482 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=464, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=537, PETRI_PLACES=86, PETRI_TRANSITIONS=75} [2024-11-27 20:16:00,482 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 48 predicate places. [2024-11-27 20:16:00,482 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 75 transitions, 537 flow [2024-11-27 20:16:00,483 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:16:00,483 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:16:00,483 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1] [2024-11-27 20:16:00,493 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-27 20:16:00,683 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:16:00,683 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:16:00,684 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:16:00,684 INFO L85 PathProgramCache]: Analyzing trace with hash 899885618, now seen corresponding path program 2 times [2024-11-27 20:16:00,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:16:00,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1747092417] [2024-11-27 20:16:00,684 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:16:00,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:16:00,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:16:00,686 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:16:00,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-27 20:16:00,774 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-27 20:16:00,774 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:16:00,776 INFO L256 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-27 20:16:00,777 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:16:00,790 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 7 [2024-11-27 20:16:01,057 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-27 20:16:01,058 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:16:02,024 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-27 20:16:02,024 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:16:02,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747092417] [2024-11-27 20:16:02,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747092417] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:16:02,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:16:02,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2024-11-27 20:16:02,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425948925] [2024-11-27 20:16:02,024 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:16:02,025 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-27 20:16:02,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:16:02,025 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-27 20:16:02,025 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-27 20:16:03,322 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-11-27 20:16:03,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 75 transitions, 537 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:16:03,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:16:03,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-11-27 20:16:03,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:16:04,053 INFO L124 PetriNetUnfolderBase]: 644/1193 cut-off events. [2024-11-27 20:16:04,053 INFO L125 PetriNetUnfolderBase]: For 905/905 co-relation queries the response was YES. [2024-11-27 20:16:04,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3602 conditions, 1193 events. 644/1193 cut-off events. For 905/905 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 5890 event pairs, 351 based on Foata normal form. 14/1207 useless extension candidates. Maximal degree in co-relation 3540. Up to 839 conditions per place. [2024-11-27 20:16:04,061 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 64 selfloop transitions, 23 changer transitions 0/92 dead transitions. [2024-11-27 20:16:04,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 92 transitions, 787 flow [2024-11-27 20:16:04,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:16:04,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 20:16:04,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2024-11-27 20:16:04,063 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.518918918918919 [2024-11-27 20:16:04,063 INFO L175 Difference]: Start difference. First operand has 86 places, 75 transitions, 537 flow. Second operand 5 states and 96 transitions. [2024-11-27 20:16:04,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 92 transitions, 787 flow [2024-11-27 20:16:04,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 92 transitions, 769 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-27 20:16:04,070 INFO L231 Difference]: Finished difference. Result has 86 places, 74 transitions, 560 flow [2024-11-27 20:16:04,071 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=514, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=560, PETRI_PLACES=86, PETRI_TRANSITIONS=74} [2024-11-27 20:16:04,071 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 48 predicate places. [2024-11-27 20:16:04,071 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 74 transitions, 560 flow [2024-11-27 20:16:04,072 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:16:04,072 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:16:04,072 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:16:04,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-27 20:16:04,272 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:16:04,273 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:16:04,273 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:16:04,273 INFO L85 PathProgramCache]: Analyzing trace with hash 877334984, now seen corresponding path program 2 times [2024-11-27 20:16:04,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:16:04,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1825426701] [2024-11-27 20:16:04,274 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:16:04,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:16:04,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:16:04,276 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:16:04,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-27 20:16:04,339 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-27 20:16:04,339 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:16:04,340 INFO L256 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-27 20:16:04,342 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:16:04,353 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 7 [2024-11-27 20:16:04,719 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-27 20:16:04,719 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:16:04,719 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:16:04,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825426701] [2024-11-27 20:16:04,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825426701] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:16:04,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:16:04,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 20:16:04,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192391697] [2024-11-27 20:16:04,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:16:04,720 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:16:04,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:16:04,720 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:16:04,720 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 20:16:04,821 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2024-11-27 20:16:04,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 74 transitions, 560 flow. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:16:04,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:16:04,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2024-11-27 20:16:04,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:16:05,238 INFO L124 PetriNetUnfolderBase]: 743/1321 cut-off events. [2024-11-27 20:16:05,238 INFO L125 PetriNetUnfolderBase]: For 1777/1777 co-relation queries the response was YES. [2024-11-27 20:16:05,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4122 conditions, 1321 events. 743/1321 cut-off events. For 1777/1777 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 6003 event pairs, 243 based on Foata normal form. 16/1337 useless extension candidates. Maximal degree in co-relation 4060. Up to 763 conditions per place. [2024-11-27 20:16:05,249 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 72 selfloop transitions, 17 changer transitions 0/91 dead transitions. [2024-11-27 20:16:05,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 91 transitions, 818 flow [2024-11-27 20:16:05,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 20:16:05,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 20:16:05,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 80 transitions. [2024-11-27 20:16:05,251 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5405405405405406 [2024-11-27 20:16:05,251 INFO L175 Difference]: Start difference. First operand has 86 places, 74 transitions, 560 flow. Second operand 4 states and 80 transitions. [2024-11-27 20:16:05,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 91 transitions, 818 flow [2024-11-27 20:16:05,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 91 transitions, 760 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-27 20:16:05,263 INFO L231 Difference]: Finished difference. Result has 86 places, 75 transitions, 574 flow [2024-11-27 20:16:05,263 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=514, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=574, PETRI_PLACES=86, PETRI_TRANSITIONS=75} [2024-11-27 20:16:05,264 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 48 predicate places. [2024-11-27 20:16:05,264 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 75 transitions, 574 flow [2024-11-27 20:16:05,264 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:16:05,264 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:16:05,264 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:16:05,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-27 20:16:05,465 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:16:05,465 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:16:05,465 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:16:05,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1427581223, now seen corresponding path program 2 times [2024-11-27 20:16:05,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:16:05,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1640836518] [2024-11-27 20:16:05,466 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:16:05,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:16:05,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:16:05,468 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:16:05,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-27 20:16:05,552 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-27 20:16:05,552 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:16:05,554 INFO L256 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-27 20:16:05,556 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:16:05,566 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 7 [2024-11-27 20:16:05,793 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-27 20:16:05,793 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:16:05,793 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:16:05,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640836518] [2024-11-27 20:16:05,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640836518] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:16:05,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:16:05,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 20:16:05,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413276419] [2024-11-27 20:16:05,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:16:05,794 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:16:05,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:16:05,794 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:16:05,794 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:16:06,011 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2024-11-27 20:16:06,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 75 transitions, 574 flow. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:16:06,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:16:06,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2024-11-27 20:16:06,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:16:06,499 INFO L124 PetriNetUnfolderBase]: 674/1204 cut-off events. [2024-11-27 20:16:06,500 INFO L125 PetriNetUnfolderBase]: For 1311/1311 co-relation queries the response was YES. [2024-11-27 20:16:06,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3599 conditions, 1204 events. 674/1204 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 5452 event pairs, 294 based on Foata normal form. 48/1252 useless extension candidates. Maximal degree in co-relation 3536. Up to 655 conditions per place. [2024-11-27 20:16:06,520 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 69 selfloop transitions, 17 changer transitions 0/88 dead transitions. [2024-11-27 20:16:06,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 88 transitions, 817 flow [2024-11-27 20:16:06,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:16:06,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 20:16:06,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 85 transitions. [2024-11-27 20:16:06,522 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4594594594594595 [2024-11-27 20:16:06,522 INFO L175 Difference]: Start difference. First operand has 86 places, 75 transitions, 574 flow. Second operand 5 states and 85 transitions. [2024-11-27 20:16:06,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 88 transitions, 817 flow [2024-11-27 20:16:06,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 88 transitions, 788 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-27 20:16:06,527 INFO L231 Difference]: Finished difference. Result has 81 places, 72 transitions, 555 flow [2024-11-27 20:16:06,528 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=555, PETRI_PLACES=81, PETRI_TRANSITIONS=72} [2024-11-27 20:16:06,528 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 43 predicate places. [2024-11-27 20:16:06,528 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 72 transitions, 555 flow [2024-11-27 20:16:06,528 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:16:06,529 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:16:06,529 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:16:06,538 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-27 20:16:06,729 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:16:06,729 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:16:06,730 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:16:06,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1754176379, now seen corresponding path program 1 times [2024-11-27 20:16:06,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:16:06,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1287935226] [2024-11-27 20:16:06,730 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:16:06,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:16:06,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:16:06,732 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:16:06,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-27 20:16:06,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:16:06,809 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-27 20:16:06,810 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:16:06,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:16:06,843 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:16:06,843 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:16:06,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287935226] [2024-11-27 20:16:06,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287935226] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:16:06,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:16:06,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 20:16:06,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321272556] [2024-11-27 20:16:06,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:16:06,843 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:16:06,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:16:06,844 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:16:06,844 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-27 20:16:06,844 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-27 20:16:06,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 72 transitions, 555 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:16:06,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:16:06,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-27 20:16:06,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:16:07,098 INFO L124 PetriNetUnfolderBase]: 752/1336 cut-off events. [2024-11-27 20:16:07,098 INFO L125 PetriNetUnfolderBase]: For 1395/1395 co-relation queries the response was YES. [2024-11-27 20:16:07,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4116 conditions, 1336 events. 752/1336 cut-off events. For 1395/1395 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 6286 event pairs, 162 based on Foata normal form. 27/1363 useless extension candidates. Maximal degree in co-relation 4056. Up to 1011 conditions per place. [2024-11-27 20:16:07,103 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 92 selfloop transitions, 13 changer transitions 1/108 dead transitions. [2024-11-27 20:16:07,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 108 transitions, 949 flow [2024-11-27 20:16:07,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 20:16:07,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 20:16:07,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-11-27 20:16:07,105 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6486486486486487 [2024-11-27 20:16:07,105 INFO L175 Difference]: Start difference. First operand has 81 places, 72 transitions, 555 flow. Second operand 4 states and 96 transitions. [2024-11-27 20:16:07,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 108 transitions, 949 flow [2024-11-27 20:16:07,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 108 transitions, 903 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-27 20:16:07,111 INFO L231 Difference]: Finished difference. Result has 83 places, 85 transitions, 675 flow [2024-11-27 20:16:07,112 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=675, PETRI_PLACES=83, PETRI_TRANSITIONS=85} [2024-11-27 20:16:07,112 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 45 predicate places. [2024-11-27 20:16:07,112 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 85 transitions, 675 flow [2024-11-27 20:16:07,113 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:16:07,113 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:16:07,113 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:16:07,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-27 20:16:07,316 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:16:07,317 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:16:07,317 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:16:07,317 INFO L85 PathProgramCache]: Analyzing trace with hash -448452269, now seen corresponding path program 2 times [2024-11-27 20:16:07,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:16:07,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2137198874] [2024-11-27 20:16:07,317 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:16:07,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:16:07,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:16:07,320 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:16:07,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-27 20:16:07,398 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:16:07,398 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:16:07,400 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-27 20:16:07,401 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:16:07,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:16:07,421 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:16:07,421 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:16:07,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137198874] [2024-11-27 20:16:07,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137198874] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:16:07,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:16:07,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 20:16:07,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969918613] [2024-11-27 20:16:07,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:16:07,422 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:16:07,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:16:07,423 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:16:07,423 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 20:16:07,423 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-27 20:16:07,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 85 transitions, 675 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:16:07,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:16:07,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-27 20:16:07,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:16:07,700 INFO L124 PetriNetUnfolderBase]: 740/1324 cut-off events. [2024-11-27 20:16:07,700 INFO L125 PetriNetUnfolderBase]: For 1966/1966 co-relation queries the response was YES. [2024-11-27 20:16:07,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4455 conditions, 1324 events. 740/1324 cut-off events. For 1966/1966 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 6316 event pairs, 331 based on Foata normal form. 12/1336 useless extension candidates. Maximal degree in co-relation 4395. Up to 862 conditions per place. [2024-11-27 20:16:07,709 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 99 selfloop transitions, 15 changer transitions 1/117 dead transitions. [2024-11-27 20:16:07,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 117 transitions, 1086 flow [2024-11-27 20:16:07,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 20:16:07,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 20:16:07,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2024-11-27 20:16:07,711 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6351351351351351 [2024-11-27 20:16:07,711 INFO L175 Difference]: Start difference. First operand has 83 places, 85 transitions, 675 flow. Second operand 4 states and 94 transitions. [2024-11-27 20:16:07,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 117 transitions, 1086 flow [2024-11-27 20:16:07,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 117 transitions, 1086 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-27 20:16:07,718 INFO L231 Difference]: Finished difference. Result has 88 places, 86 transitions, 739 flow [2024-11-27 20:16:07,718 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=675, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=739, PETRI_PLACES=88, PETRI_TRANSITIONS=86} [2024-11-27 20:16:07,719 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 50 predicate places. [2024-11-27 20:16:07,719 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 86 transitions, 739 flow [2024-11-27 20:16:07,719 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:16:07,720 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:16:07,720 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:16:07,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-27 20:16:07,920 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:16:07,920 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:16:07,921 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:16:07,921 INFO L85 PathProgramCache]: Analyzing trace with hash 2102765381, now seen corresponding path program 3 times [2024-11-27 20:16:07,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:16:07,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1471752078] [2024-11-27 20:16:07,921 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 20:16:07,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:16:07,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:16:07,923 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:16:07,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-27 20:16:07,993 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 20:16:07,993 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:16:07,994 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-27 20:16:07,995 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:16:08,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:16:08,028 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:16:08,028 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:16:08,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471752078] [2024-11-27 20:16:08,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471752078] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:16:08,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:16:08,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 20:16:08,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868944503] [2024-11-27 20:16:08,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:16:08,029 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:16:08,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:16:08,029 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:16:08,029 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-27 20:16:08,029 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-27 20:16:08,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 86 transitions, 739 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:16:08,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:16:08,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-27 20:16:08,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:16:08,326 INFO L124 PetriNetUnfolderBase]: 737/1306 cut-off events. [2024-11-27 20:16:08,326 INFO L125 PetriNetUnfolderBase]: For 2959/2959 co-relation queries the response was YES. [2024-11-27 20:16:08,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4841 conditions, 1306 events. 737/1306 cut-off events. For 2959/2959 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 6097 event pairs, 331 based on Foata normal form. 27/1333 useless extension candidates. Maximal degree in co-relation 4778. Up to 862 conditions per place. [2024-11-27 20:16:08,337 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 92 selfloop transitions, 26 changer transitions 2/122 dead transitions. [2024-11-27 20:16:08,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 122 transitions, 1206 flow [2024-11-27 20:16:08,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 20:16:08,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 20:16:08,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 95 transitions. [2024-11-27 20:16:08,339 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6418918918918919 [2024-11-27 20:16:08,339 INFO L175 Difference]: Start difference. First operand has 88 places, 86 transitions, 739 flow. Second operand 4 states and 95 transitions. [2024-11-27 20:16:08,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 122 transitions, 1206 flow [2024-11-27 20:16:08,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 122 transitions, 1150 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-11-27 20:16:08,351 INFO L231 Difference]: Finished difference. Result has 90 places, 94 transitions, 837 flow [2024-11-27 20:16:08,351 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=695, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=837, PETRI_PLACES=90, PETRI_TRANSITIONS=94} [2024-11-27 20:16:08,352 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 52 predicate places. [2024-11-27 20:16:08,352 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 94 transitions, 837 flow [2024-11-27 20:16:08,352 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:16:08,352 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:16:08,352 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] [2024-11-27 20:16:08,363 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-27 20:16:08,553 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:16:08,553 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:16:08,553 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:16:08,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1246373148, now seen corresponding path program 1 times [2024-11-27 20:16:08,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:16:08,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1312427316] [2024-11-27 20:16:08,554 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:16:08,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:16:08,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:16:08,556 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:16:08,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-27 20:16:08,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:16:08,644 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-27 20:16:08,645 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:16:08,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:16:08,667 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:16:08,667 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:16:08,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312427316] [2024-11-27 20:16:08,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312427316] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:16:08,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:16:08,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 20:16:08,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211192219] [2024-11-27 20:16:08,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:16:08,668 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:16:08,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:16:08,668 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:16:08,668 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 20:16:08,668 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-27 20:16:08,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 94 transitions, 837 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:16:08,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:16:08,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-27 20:16:08,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:16:08,943 INFO L124 PetriNetUnfolderBase]: 695/1240 cut-off events. [2024-11-27 20:16:08,944 INFO L125 PetriNetUnfolderBase]: For 3492/3492 co-relation queries the response was YES. [2024-11-27 20:16:08,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4787 conditions, 1240 events. 695/1240 cut-off events. For 3492/3492 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 6017 event pairs, 217 based on Foata normal form. 18/1258 useless extension candidates. Maximal degree in co-relation 4724. Up to 784 conditions per place. [2024-11-27 20:16:08,949 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 124 selfloop transitions, 8 changer transitions 3/137 dead transitions. [2024-11-27 20:16:08,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 137 transitions, 1400 flow [2024-11-27 20:16:08,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 20:16:08,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 20:16:08,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-11-27 20:16:08,951 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6824324324324325 [2024-11-27 20:16:08,951 INFO L175 Difference]: Start difference. First operand has 90 places, 94 transitions, 837 flow. Second operand 4 states and 101 transitions. [2024-11-27 20:16:08,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 137 transitions, 1400 flow [2024-11-27 20:16:08,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 137 transitions, 1338 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-11-27 20:16:08,956 INFO L231 Difference]: Finished difference. Result has 91 places, 95 transitions, 836 flow [2024-11-27 20:16:08,957 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=795, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=836, PETRI_PLACES=91, PETRI_TRANSITIONS=95} [2024-11-27 20:16:08,957 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 53 predicate places. [2024-11-27 20:16:08,957 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 95 transitions, 836 flow [2024-11-27 20:16:08,957 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:16:08,957 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:16:08,957 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] [2024-11-27 20:16:08,964 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-27 20:16:09,158 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:16:09,158 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:16:09,158 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:16:09,158 INFO L85 PathProgramCache]: Analyzing trace with hash -426252086, now seen corresponding path program 2 times [2024-11-27 20:16:09,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:16:09,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [154595462] [2024-11-27 20:16:09,159 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:16:09,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:16:09,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:16:09,161 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:16:09,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-27 20:16:09,241 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:16:09,241 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:16:09,244 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-27 20:16:09,245 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:16:09,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:16:09,271 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:16:09,271 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:16:09,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154595462] [2024-11-27 20:16:09,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154595462] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:16:09,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:16:09,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 20:16:09,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236634474] [2024-11-27 20:16:09,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:16:09,272 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:16:09,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:16:09,273 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:16:09,273 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-27 20:16:09,273 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-27 20:16:09,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 95 transitions, 836 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:16:09,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:16:09,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-27 20:16:09,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:16:09,541 INFO L124 PetriNetUnfolderBase]: 803/1420 cut-off events. [2024-11-27 20:16:09,542 INFO L125 PetriNetUnfolderBase]: For 3974/3974 co-relation queries the response was YES. [2024-11-27 20:16:09,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5946 conditions, 1420 events. 803/1420 cut-off events. For 3974/3974 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 6809 event pairs, 209 based on Foata normal form. 36/1456 useless extension candidates. Maximal degree in co-relation 5882. Up to 1098 conditions per place. [2024-11-27 20:16:09,551 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 103 selfloop transitions, 16 changer transitions 2/123 dead transitions. [2024-11-27 20:16:09,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 123 transitions, 1288 flow [2024-11-27 20:16:09,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 20:16:09,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 20:16:09,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 95 transitions. [2024-11-27 20:16:09,552 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6418918918918919 [2024-11-27 20:16:09,552 INFO L175 Difference]: Start difference. First operand has 91 places, 95 transitions, 836 flow. Second operand 4 states and 95 transitions. [2024-11-27 20:16:09,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 123 transitions, 1288 flow [2024-11-27 20:16:09,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 123 transitions, 1252 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-27 20:16:09,561 INFO L231 Difference]: Finished difference. Result has 94 places, 102 transitions, 950 flow [2024-11-27 20:16:09,561 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=813, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=950, PETRI_PLACES=94, PETRI_TRANSITIONS=102} [2024-11-27 20:16:09,562 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 56 predicate places. [2024-11-27 20:16:09,562 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 102 transitions, 950 flow [2024-11-27 20:16:09,562 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:16:09,562 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:16:09,562 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] [2024-11-27 20:16:09,572 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-27 20:16:09,763 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:16:09,763 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:16:09,763 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:16:09,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1180963712, now seen corresponding path program 3 times [2024-11-27 20:16:09,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:16:09,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [198878284] [2024-11-27 20:16:09,764 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 20:16:09,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:16:09,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:16:09,767 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:16:09,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-27 20:16:09,835 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-27 20:16:09,835 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:16:09,837 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-27 20:16:09,838 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:16:09,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:16:09,871 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:16:09,871 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:16:09,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198878284] [2024-11-27 20:16:09,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198878284] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:16:09,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:16:09,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 20:16:09,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056979509] [2024-11-27 20:16:09,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:16:09,872 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 20:16:09,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:16:09,872 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 20:16:09,872 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-27 20:16:09,872 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-27 20:16:09,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 102 transitions, 950 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:16:09,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:16:09,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-27 20:16:09,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:16:10,152 INFO L124 PetriNetUnfolderBase]: 785/1369 cut-off events. [2024-11-27 20:16:10,152 INFO L125 PetriNetUnfolderBase]: For 4747/4747 co-relation queries the response was YES. [2024-11-27 20:16:10,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5995 conditions, 1369 events. 785/1369 cut-off events. For 4747/4747 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 6489 event pairs, 223 based on Foata normal form. 36/1405 useless extension candidates. Maximal degree in co-relation 5930. Up to 820 conditions per place. [2024-11-27 20:16:10,157 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 114 selfloop transitions, 29 changer transitions 2/147 dead transitions. [2024-11-27 20:16:10,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 147 transitions, 1574 flow [2024-11-27 20:16:10,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 20:16:10,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 20:16:10,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-11-27 20:16:10,159 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6824324324324325 [2024-11-27 20:16:10,159 INFO L175 Difference]: Start difference. First operand has 94 places, 102 transitions, 950 flow. Second operand 4 states and 101 transitions. [2024-11-27 20:16:10,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 147 transitions, 1574 flow [2024-11-27 20:16:10,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 147 transitions, 1544 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-11-27 20:16:10,166 INFO L231 Difference]: Finished difference. Result has 97 places, 110 transitions, 1113 flow [2024-11-27 20:16:10,166 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=935, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1113, PETRI_PLACES=97, PETRI_TRANSITIONS=110} [2024-11-27 20:16:10,167 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 59 predicate places. [2024-11-27 20:16:10,167 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 110 transitions, 1113 flow [2024-11-27 20:16:10,167 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:16:10,167 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:16:10,167 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] [2024-11-27 20:16:10,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-27 20:16:10,367 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:16:10,368 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:16:10,368 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:16:10,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1544129964, now seen corresponding path program 1 times [2024-11-27 20:16:10,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:16:10,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [529546967] [2024-11-27 20:16:10,368 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:16:10,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:16:10,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:16:10,370 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:16:10,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-27 20:16:10,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:16:10,448 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-27 20:16:10,449 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:16:10,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:16:10,535 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:16:10,535 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:16:10,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529546967] [2024-11-27 20:16:10,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529546967] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:16:10,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:16:10,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-27 20:16:10,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113074613] [2024-11-27 20:16:10,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:16:10,535 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 20:16:10,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:16:10,536 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 20:16:10,536 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:16:10,536 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-27 20:16:10,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 110 transitions, 1113 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:16:10,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:16:10,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-27 20:16:10,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:16:10,961 INFO L124 PetriNetUnfolderBase]: 965/1663 cut-off events. [2024-11-27 20:16:10,961 INFO L125 PetriNetUnfolderBase]: For 6445/6445 co-relation queries the response was YES. [2024-11-27 20:16:10,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7739 conditions, 1663 events. 965/1663 cut-off events. For 6445/6445 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 8016 event pairs, 220 based on Foata normal form. 66/1729 useless extension candidates. Maximal degree in co-relation 7673. Up to 766 conditions per place. [2024-11-27 20:16:10,968 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 132 selfloop transitions, 42 changer transitions 0/176 dead transitions. [2024-11-27 20:16:10,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 176 transitions, 1942 flow [2024-11-27 20:16:10,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 20:16:10,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-27 20:16:10,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-11-27 20:16:10,970 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6216216216216216 [2024-11-27 20:16:10,970 INFO L175 Difference]: Start difference. First operand has 97 places, 110 transitions, 1113 flow. Second operand 6 states and 138 transitions. [2024-11-27 20:16:10,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 176 transitions, 1942 flow [2024-11-27 20:16:10,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 176 transitions, 1902 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-11-27 20:16:10,983 INFO L231 Difference]: Finished difference. Result has 99 places, 113 transitions, 1198 flow [2024-11-27 20:16:10,984 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1073, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1198, PETRI_PLACES=99, PETRI_TRANSITIONS=113} [2024-11-27 20:16:10,984 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 61 predicate places. [2024-11-27 20:16:10,984 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 113 transitions, 1198 flow [2024-11-27 20:16:10,985 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:16:10,985 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:16:10,985 INFO L206 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1] [2024-11-27 20:16:10,996 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-27 20:16:11,185 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:16:11,185 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:16:11,186 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:16:11,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1285628280, now seen corresponding path program 3 times [2024-11-27 20:16:11,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:16:11,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1614816615] [2024-11-27 20:16:11,186 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 20:16:11,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:16:11,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:16:11,188 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:16:11,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-27 20:16:11,550 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-27 20:16:11,550 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:16:11,556 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-27 20:16:11,557 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:16:11,568 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 7 [2024-11-27 20:16:12,249 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:16:12,249 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:16:15,029 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:16:15,030 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:16:15,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614816615] [2024-11-27 20:16:15,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614816615] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:16:15,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:16:15,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2024-11-27 20:16:15,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267519021] [2024-11-27 20:16:15,030 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:16:15,031 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-27 20:16:15,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:16:15,031 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-27 20:16:15,032 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2024-11-27 20:16:19,051 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-11-27 20:16:19,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 113 transitions, 1198 flow. Second operand has 26 states, 26 states have (on average 14.76923076923077) internal successors, (384), 26 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:16:19,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:16:19,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-11-27 20:16:19,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:16:39,287 INFO L124 PetriNetUnfolderBase]: 977/1699 cut-off events. [2024-11-27 20:16:39,287 INFO L125 PetriNetUnfolderBase]: For 8355/8355 co-relation queries the response was YES. [2024-11-27 20:16:39,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8308 conditions, 1699 events. 977/1699 cut-off events. For 8355/8355 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 7923 event pairs, 605 based on Foata normal form. 12/1711 useless extension candidates. Maximal degree in co-relation 8024. Up to 1653 conditions per place. [2024-11-27 20:16:39,295 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 83 selfloop transitions, 65 changer transitions 0/149 dead transitions. [2024-11-27 20:16:39,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 149 transitions, 1866 flow [2024-11-27 20:16:39,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-27 20:16:39,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2024-11-27 20:16:39,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 684 transitions. [2024-11-27 20:16:39,299 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41081081081081083 [2024-11-27 20:16:39,299 INFO L175 Difference]: Start difference. First operand has 99 places, 113 transitions, 1198 flow. Second operand 45 states and 684 transitions. [2024-11-27 20:16:39,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 149 transitions, 1866 flow [2024-11-27 20:16:39,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 149 transitions, 1767 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-11-27 20:16:39,315 INFO L231 Difference]: Finished difference. Result has 151 places, 149 transitions, 1655 flow [2024-11-27 20:16:39,315 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1123, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1655, PETRI_PLACES=151, PETRI_TRANSITIONS=149} [2024-11-27 20:16:39,316 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 113 predicate places. [2024-11-27 20:16:39,316 INFO L471 AbstractCegarLoop]: Abstraction has has 151 places, 149 transitions, 1655 flow [2024-11-27 20:16:39,316 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 14.76923076923077) internal successors, (384), 26 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:16:39,317 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:16:39,317 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:16:39,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-27 20:16:39,517 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:16:39,518 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:16:39,518 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:16:39,518 INFO L85 PathProgramCache]: Analyzing trace with hash -153211346, now seen corresponding path program 2 times [2024-11-27 20:16:39,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:16:39,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [217351141] [2024-11-27 20:16:39,519 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:16:39,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:16:39,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:16:39,521 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:16:39,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-27 20:16:39,616 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-27 20:16:39,616 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:16:39,619 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-27 20:16:39,620 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:16:39,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:16:39,780 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:16:39,780 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:16:39,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217351141] [2024-11-27 20:16:39,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217351141] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:16:39,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:16:39,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-27 20:16:39,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429713337] [2024-11-27 20:16:39,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:16:39,781 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 20:16:39,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:16:39,782 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 20:16:39,782 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-11-27 20:16:39,782 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-27 20:16:39,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 149 transitions, 1655 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:16:39,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:16:39,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-27 20:16:39,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:16:40,519 INFO L124 PetriNetUnfolderBase]: 1250/2158 cut-off events. [2024-11-27 20:16:40,519 INFO L125 PetriNetUnfolderBase]: For 7850/7850 co-relation queries the response was YES. [2024-11-27 20:16:40,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10261 conditions, 2158 events. 1250/2158 cut-off events. For 7850/7850 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 10840 event pairs, 198 based on Foata normal form. 72/2230 useless extension candidates. Maximal degree in co-relation 10160. Up to 778 conditions per place. [2024-11-27 20:16:40,532 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 200 selfloop transitions, 54 changer transitions 0/256 dead transitions. [2024-11-27 20:16:40,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 256 transitions, 3013 flow [2024-11-27 20:16:40,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 20:16:40,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-27 20:16:40,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-11-27 20:16:40,533 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6293436293436293 [2024-11-27 20:16:40,533 INFO L175 Difference]: Start difference. First operand has 151 places, 149 transitions, 1655 flow. Second operand 7 states and 163 transitions. [2024-11-27 20:16:40,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 256 transitions, 3013 flow [2024-11-27 20:16:40,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 256 transitions, 2829 flow, removed 63 selfloop flow, removed 20 redundant places. [2024-11-27 20:16:40,554 INFO L231 Difference]: Finished difference. Result has 139 places, 164 transitions, 1779 flow [2024-11-27 20:16:40,554 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1471, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1779, PETRI_PLACES=139, PETRI_TRANSITIONS=164} [2024-11-27 20:16:40,555 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 101 predicate places. [2024-11-27 20:16:40,555 INFO L471 AbstractCegarLoop]: Abstraction has has 139 places, 164 transitions, 1779 flow [2024-11-27 20:16:40,555 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:16:40,555 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:16:40,556 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:16:40,566 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-27 20:16:40,756 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:16:40,756 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:16:40,756 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:16:40,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1719597820, now seen corresponding path program 3 times [2024-11-27 20:16:40,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:16:40,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1249580126] [2024-11-27 20:16:40,757 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 20:16:40,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:16:40,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:16:40,759 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:16:40,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-27 20:16:40,851 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-27 20:16:40,851 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:16:40,855 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-27 20:16:40,856 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:16:40,873 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 7 [2024-11-27 20:16:40,954 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 [2024-11-27 20:16:41,259 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 17 treesize of output 13 [2024-11-27 20:16:41,483 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-27 20:16:41,496 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:16:41,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 10 [2024-11-27 20:16:41,549 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-27 20:16:41,549 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:16:42,702 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-11-27 20:16:42,761 INFO L349 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2024-11-27 20:16:42,761 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 86 treesize of output 69 [2024-11-27 20:16:43,112 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-27 20:16:43,112 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:16:43,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249580126] [2024-11-27 20:16:43,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249580126] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:16:43,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:16:43,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2024-11-27 20:16:43,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988817067] [2024-11-27 20:16:43,112 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:16:43,112 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-27 20:16:43,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:16:43,113 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-27 20:16:43,113 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-11-27 20:16:44,619 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-11-27 20:16:44,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 164 transitions, 1779 flow. Second operand has 13 states, 13 states have (on average 13.0) internal successors, (169), 13 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:16:44,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:16:44,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-11-27 20:16:44,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:16:47,248 INFO L124 PetriNetUnfolderBase]: 1761/3032 cut-off events. [2024-11-27 20:16:47,249 INFO L125 PetriNetUnfolderBase]: For 15681/15681 co-relation queries the response was YES. [2024-11-27 20:16:47,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15329 conditions, 3032 events. 1761/3032 cut-off events. For 15681/15681 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 15620 event pairs, 225 based on Foata normal form. 5/3037 useless extension candidates. Maximal degree in co-relation 15235. Up to 1227 conditions per place. [2024-11-27 20:16:47,260 INFO L140 encePairwiseOnDemand]: 26/37 looper letters, 157 selfloop transitions, 82 changer transitions 73/313 dead transitions. [2024-11-27 20:16:47,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 313 transitions, 3583 flow [2024-11-27 20:16:47,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-27 20:16:47,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-27 20:16:47,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 284 transitions. [2024-11-27 20:16:47,262 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5117117117117117 [2024-11-27 20:16:47,262 INFO L175 Difference]: Start difference. First operand has 139 places, 164 transitions, 1779 flow. Second operand 15 states and 284 transitions. [2024-11-27 20:16:47,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 313 transitions, 3583 flow [2024-11-27 20:16:47,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 313 transitions, 3353 flow, removed 64 selfloop flow, removed 4 redundant places. [2024-11-27 20:16:47,278 INFO L231 Difference]: Finished difference. Result has 157 places, 180 transitions, 2066 flow [2024-11-27 20:16:47,279 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1653, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2066, PETRI_PLACES=157, PETRI_TRANSITIONS=180} [2024-11-27 20:16:47,279 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 119 predicate places. [2024-11-27 20:16:47,279 INFO L471 AbstractCegarLoop]: Abstraction has has 157 places, 180 transitions, 2066 flow [2024-11-27 20:16:47,279 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 13.0) internal successors, (169), 13 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:16:47,280 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:16:47,280 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:16:47,287 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-27 20:16:47,480 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:16:47,480 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:16:47,481 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:16:47,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1453946866, now seen corresponding path program 4 times [2024-11-27 20:16:47,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:16:47,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1007975065] [2024-11-27 20:16:47,481 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 20:16:47,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:16:47,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:16:47,483 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:16:47,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-27 20:16:47,584 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 20:16:47,584 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:16:47,589 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-27 20:16:47,591 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:16:47,646 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 [2024-11-27 20:16:47,986 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-27 20:16:47,991 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:16:47,991 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 10 [2024-11-27 20:16:48,022 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-27 20:16:48,022 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:16:49,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-11-27 20:16:49,432 INFO L349 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2024-11-27 20:16:49,432 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 86 treesize of output 69 [2024-11-27 20:16:49,700 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-27 20:16:49,700 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:16:49,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007975065] [2024-11-27 20:16:49,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007975065] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:16:49,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:16:49,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2024-11-27 20:16:49,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618107013] [2024-11-27 20:16:49,701 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:16:49,701 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-27 20:16:49,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:16:49,702 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-27 20:16:49,702 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2024-11-27 20:16:51,398 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-27 20:16:51,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 180 transitions, 2066 flow. Second operand has 15 states, 15 states have (on average 16.933333333333334) internal successors, (254), 15 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:16:51,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:16:51,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-27 20:16:51,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:16:55,376 INFO L124 PetriNetUnfolderBase]: 1556/2738 cut-off events. [2024-11-27 20:16:55,377 INFO L125 PetriNetUnfolderBase]: For 16899/16899 co-relation queries the response was YES. [2024-11-27 20:16:55,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14826 conditions, 2738 events. 1556/2738 cut-off events. For 16899/16899 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 13681 event pairs, 325 based on Foata normal form. 3/2741 useless extension candidates. Maximal degree in co-relation 14731. Up to 1785 conditions per place. [2024-11-27 20:16:55,400 INFO L140 encePairwiseOnDemand]: 26/37 looper letters, 139 selfloop transitions, 77 changer transitions 42/260 dead transitions. [2024-11-27 20:16:55,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 260 transitions, 3269 flow [2024-11-27 20:16:55,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-27 20:16:55,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-27 20:16:55,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 224 transitions. [2024-11-27 20:16:55,403 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6054054054054054 [2024-11-27 20:16:55,403 INFO L175 Difference]: Start difference. First operand has 157 places, 180 transitions, 2066 flow. Second operand 10 states and 224 transitions. [2024-11-27 20:16:55,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 260 transitions, 3269 flow [2024-11-27 20:16:55,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 260 transitions, 3214 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-11-27 20:16:55,452 INFO L231 Difference]: Finished difference. Result has 157 places, 185 transitions, 2314 flow [2024-11-27 20:16:55,453 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=2023, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2314, PETRI_PLACES=157, PETRI_TRANSITIONS=185} [2024-11-27 20:16:55,453 INFO L279 CegarLoopForPetriNet]: 38 programPoint places, 119 predicate places. [2024-11-27 20:16:55,453 INFO L471 AbstractCegarLoop]: Abstraction has has 157 places, 185 transitions, 2314 flow [2024-11-27 20:16:55,454 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 16.933333333333334) internal successors, (254), 15 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:16:55,454 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:16:55,454 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:16:55,467 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-27 20:16:55,655 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:16:55,655 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-27 20:16:55,656 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:16:55,656 INFO L85 PathProgramCache]: Analyzing trace with hash -838231482, now seen corresponding path program 5 times [2024-11-27 20:16:55,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:16:55,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1096606088] [2024-11-27 20:16:55,656 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 20:16:55,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:16:55,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:16:55,659 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:16:55,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91625859-8996-483c-9e95-ff13adacd1b5/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-27 20:16:55,781 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-27 20:16:55,781 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:16:55,785 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-27 20:16:55,787 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:16:56,035 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 [2024-11-27 20:16:57,116 INFO L349 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2024-11-27 20:16:57,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 40 [2024-11-27 20:16:57,184 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:16:57,184 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:17:05,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 306 treesize of output 270 [2024-11-27 20:17:07,636 INFO L349 Elim1Store]: treesize reduction 5, result has 98.3 percent of original size [2024-11-27 20:17:07,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 13 new quantified variables, introduced 28 case distinctions, treesize of input 2351 treesize of output 2034