./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-dot-product.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_ee544f9f-3a83-4898-af4e-8043c9156aab/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee544f9f-3a83-4898-af4e-8043c9156aab/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_ee544f9f-3a83-4898-af4e-8043c9156aab/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee544f9f-3a83-4898-af4e-8043c9156aab/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee544f9f-3a83-4898-af4e-8043c9156aab/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_ee544f9f-3a83-4898-af4e-8043c9156aab/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 39e90898aa78f5642c5c7d6f9df6b2e15e069a046a9465d5d61576c4b07f46b8 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 02:37:12,378 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 02:37:12,443 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee544f9f-3a83-4898-af4e-8043c9156aab/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-28 02:37:12,448 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 02:37:12,448 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 02:37:12,471 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 02:37:12,471 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 02:37:12,472 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 02:37:12,472 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 02:37:12,472 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 02:37:12,472 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 02:37:12,472 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 02:37:12,473 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 02:37:12,474 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 02:37:12,474 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 02:37:12,474 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 02:37:12,474 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 02:37:12,474 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 02:37:12,475 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 02:37:12,475 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 02:37:12,475 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-28 02:37:12,475 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-28 02:37:12,475 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-28 02:37:12,475 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 02:37:12,475 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 02:37:12,475 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-28 02:37:12,475 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 02:37:12,476 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 02:37:12,476 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 02:37:12,476 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 02:37:12,476 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 02:37:12,476 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 02:37:12,476 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 02:37:12,476 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:37:12,476 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 02:37:12,476 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 02:37:12,477 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 02:37:12,477 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 02:37:12,477 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:37:12,477 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 02:37:12,477 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 02:37:12,477 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 02:37:12,477 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 02:37:12,477 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 02:37:12,477 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 02:37:12,477 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 02:37:12,478 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 02:37:12,478 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_ee544f9f-3a83-4898-af4e-8043c9156aab/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 -> 39e90898aa78f5642c5c7d6f9df6b2e15e069a046a9465d5d61576c4b07f46b8 [2024-11-28 02:37:12,755 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 02:37:12,765 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 02:37:12,771 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 02:37:12,773 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 02:37:12,773 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 02:37:12,774 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee544f9f-3a83-4898-af4e-8043c9156aab/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c [2024-11-28 02:37:15,746 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee544f9f-3a83-4898-af4e-8043c9156aab/bin/uautomizer-verify-aQ6SnzHsRB/data/eee40c3cc/c2f0d0b4c94f477083dd9f4497fd8408/FLAGad2d09a2e [2024-11-28 02:37:15,998 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 02:37:15,999 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee544f9f-3a83-4898-af4e-8043c9156aab/sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c [2024-11-28 02:37:16,011 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee544f9f-3a83-4898-af4e-8043c9156aab/bin/uautomizer-verify-aQ6SnzHsRB/data/eee40c3cc/c2f0d0b4c94f477083dd9f4497fd8408/FLAGad2d09a2e [2024-11-28 02:37:16,033 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee544f9f-3a83-4898-af4e-8043c9156aab/bin/uautomizer-verify-aQ6SnzHsRB/data/eee40c3cc/c2f0d0b4c94f477083dd9f4497fd8408 [2024-11-28 02:37:16,035 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 02:37:16,037 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 02:37:16,038 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 02:37:16,038 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 02:37:16,043 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 02:37:16,043 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:37:16" (1/1) ... [2024-11-28 02:37:16,044 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b10965c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:37:16, skipping insertion in model container [2024-11-28 02:37:16,044 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:37:16" (1/1) ... [2024-11-28 02:37:16,061 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 02:37:16,295 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-28 02:37:16,301 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 02:37:16,319 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 02:37:16,361 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 02:37:16,390 INFO L204 MainTranslator]: Completed translation [2024-11-28 02:37:16,390 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:37:16 WrapperNode [2024-11-28 02:37:16,390 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 02:37:16,391 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 02:37:16,392 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 02:37:16,392 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 02:37:16,399 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:37:16" (1/1) ... [2024-11-28 02:37:16,407 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:37:16" (1/1) ... [2024-11-28 02:37:16,447 INFO L138 Inliner]: procedures = 25, calls = 41, calls flagged for inlining = 17, calls inlined = 23, statements flattened = 266 [2024-11-28 02:37:16,448 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 02:37:16,448 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 02:37:16,449 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 02:37:16,449 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 02:37:16,459 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:37:16" (1/1) ... [2024-11-28 02:37:16,459 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:37:16" (1/1) ... [2024-11-28 02:37:16,466 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:37:16" (1/1) ... [2024-11-28 02:37:16,498 INFO L175 MemorySlicer]: Split 13 memory accesses to 2 slices as follows [2, 11]. 85 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-28 02:37:16,501 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:37:16" (1/1) ... [2024-11-28 02:37:16,501 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:37:16" (1/1) ... [2024-11-28 02:37:16,515 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:37:16" (1/1) ... [2024-11-28 02:37:16,520 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:37:16" (1/1) ... [2024-11-28 02:37:16,528 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:37:16" (1/1) ... [2024-11-28 02:37:16,529 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:37:16" (1/1) ... [2024-11-28 02:37:16,531 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:37:16" (1/1) ... [2024-11-28 02:37:16,538 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 02:37:16,539 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 02:37:16,542 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 02:37:16,542 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 02:37:16,543 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:37:16" (1/1) ... [2024-11-28 02:37:16,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:37:16,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee544f9f-3a83-4898-af4e-8043c9156aab/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:37:16,584 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee544f9f-3a83-4898-af4e-8043c9156aab/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 02:37:16,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee544f9f-3a83-4898-af4e-8043c9156aab/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 02:37:16,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 02:37:16,615 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-28 02:37:16,615 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-28 02:37:16,615 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-28 02:37:16,615 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-28 02:37:16,615 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-28 02:37:16,615 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-28 02:37:16,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 02:37:16,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-28 02:37:16,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 02:37:16,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 02:37:16,616 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-28 02:37:16,616 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-28 02:37:16,616 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-28 02:37:16,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 02:37:16,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 02:37:16,617 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 02:37:16,617 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 02:37:16,619 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-28 02:37:16,754 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 02:37:16,756 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 02:37:17,361 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-28 02:37:17,361 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 02:37:17,838 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 02:37:17,840 INFO L312 CfgBuilder]: Removed 8 assume(true) statements. [2024-11-28 02:37:17,840 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:37:17 BoogieIcfgContainer [2024-11-28 02:37:17,841 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 02:37:17,842 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 02:37:17,844 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 02:37:17,848 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 02:37:17,849 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 02:37:16" (1/3) ... [2024-11-28 02:37:17,850 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fbb5081 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:37:17, skipping insertion in model container [2024-11-28 02:37:17,850 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:37:16" (2/3) ... [2024-11-28 02:37:17,850 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fbb5081 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:37:17, skipping insertion in model container [2024-11-28 02:37:17,851 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:37:17" (3/3) ... [2024-11-28 02:37:17,852 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-bad-dot-product.wvr.c [2024-11-28 02:37:17,869 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 02:37:17,871 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-bad-dot-product.wvr.c that has 4 procedures, 69 locations, 1 initial locations, 8 loop locations, and 24 error locations. [2024-11-28 02:37:17,871 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-28 02:37:17,973 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-28 02:37:18,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 79 transitions, 179 flow [2024-11-28 02:37:18,102 INFO L124 PetriNetUnfolderBase]: 11/76 cut-off events. [2024-11-28 02:37:18,106 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-28 02:37:18,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 76 events. 11/76 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 217 event pairs, 0 based on Foata normal form. 0/41 useless extension candidates. Maximal degree in co-relation 60. Up to 2 conditions per place. [2024-11-28 02:37:18,112 INFO L82 GeneralOperation]: Start removeDead. Operand has 78 places, 79 transitions, 179 flow [2024-11-28 02:37:18,116 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 75 transitions, 168 flow [2024-11-28 02:37:18,129 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 02:37:18,146 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;@6e5cb57a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 02:37:18,149 INFO L334 AbstractCegarLoop]: Starting to check reachability of 45 error locations. [2024-11-28 02:37:18,153 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 02:37:18,155 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-28 02:37:18,155 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-28 02:37:18,156 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:37:18,156 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-28 02:37:18,157 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-28 02:37:18,161 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:37:18,163 INFO L85 PathProgramCache]: Analyzing trace with hash 872810, now seen corresponding path program 1 times [2024-11-28 02:37:18,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:37:18,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769977529] [2024-11-28 02:37:18,171 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:37:18,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:37:18,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:37:18,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:37:18,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:37:18,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769977529] [2024-11-28 02:37:18,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769977529] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:37:18,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:37:18,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-28 02:37:18,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529977453] [2024-11-28 02:37:18,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:37:18,449 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 02:37:18,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:37:18,478 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 02:37:18,479 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 02:37:18,529 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 79 [2024-11-28 02:37:18,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 75 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:37:18,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:37:18,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 79 [2024-11-28 02:37:18,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:37:19,776 INFO L124 PetriNetUnfolderBase]: 4704/6952 cut-off events. [2024-11-28 02:37:19,777 INFO L125 PetriNetUnfolderBase]: For 326/326 co-relation queries the response was YES. [2024-11-28 02:37:19,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13669 conditions, 6952 events. 4704/6952 cut-off events. For 326/326 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 39740 event pairs, 3616 based on Foata normal form. 544/5512 useless extension candidates. Maximal degree in co-relation 12988. Up to 6434 conditions per place. [2024-11-28 02:37:19,846 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 45 selfloop transitions, 2 changer transitions 0/68 dead transitions. [2024-11-28 02:37:19,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 68 transitions, 248 flow [2024-11-28 02:37:19,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 02:37:19,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 02:37:19,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 128 transitions. [2024-11-28 02:37:19,864 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.540084388185654 [2024-11-28 02:37:19,865 INFO L175 Difference]: Start difference. First operand has 74 places, 75 transitions, 168 flow. Second operand 3 states and 128 transitions. [2024-11-28 02:37:19,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 68 transitions, 248 flow [2024-11-28 02:37:19,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 68 transitions, 236 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-28 02:37:19,879 INFO L231 Difference]: Finished difference. Result has 66 places, 68 transitions, 146 flow [2024-11-28 02:37:19,883 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=66, PETRI_TRANSITIONS=68} [2024-11-28 02:37:19,887 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, -8 predicate places. [2024-11-28 02:37:19,890 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 68 transitions, 146 flow [2024-11-28 02:37:19,890 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:37:19,890 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:37:19,890 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-28 02:37:19,891 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 02:37:19,891 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-28 02:37:19,891 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:37:19,892 INFO L85 PathProgramCache]: Analyzing trace with hash 872811, now seen corresponding path program 1 times [2024-11-28 02:37:19,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:37:19,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037873852] [2024-11-28 02:37:19,892 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:37:19,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:37:19,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:37:20,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:37:20,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:37:20,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037873852] [2024-11-28 02:37:20,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037873852] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:37:20,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:37:20,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 02:37:20,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488052171] [2024-11-28 02:37:20,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:37:20,347 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 02:37:20,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:37:20,347 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 02:37:20,349 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:37:20,440 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 79 [2024-11-28 02:37:20,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 68 transitions, 146 flow. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:37:20,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:37:20,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 79 [2024-11-28 02:37:20,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:37:21,394 INFO L124 PetriNetUnfolderBase]: 4704/6951 cut-off events. [2024-11-28 02:37:21,394 INFO L125 PetriNetUnfolderBase]: For 78/78 co-relation queries the response was YES. [2024-11-28 02:37:21,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13487 conditions, 6951 events. 4704/6951 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 39685 event pairs, 3616 based on Foata normal form. 0/4967 useless extension candidates. Maximal degree in co-relation 13466. Up to 6438 conditions per place. [2024-11-28 02:37:21,444 INFO L140 encePairwiseOnDemand]: 74/79 looper letters, 44 selfloop transitions, 4 changer transitions 0/67 dead transitions. [2024-11-28 02:37:21,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 67 transitions, 240 flow [2024-11-28 02:37:21,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 02:37:21,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 02:37:21,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 149 transitions. [2024-11-28 02:37:21,446 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47151898734177217 [2024-11-28 02:37:21,446 INFO L175 Difference]: Start difference. First operand has 66 places, 68 transitions, 146 flow. Second operand 4 states and 149 transitions. [2024-11-28 02:37:21,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 67 transitions, 240 flow [2024-11-28 02:37:21,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 67 transitions, 236 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 02:37:21,448 INFO L231 Difference]: Finished difference. Result has 66 places, 67 transitions, 148 flow [2024-11-28 02:37:21,448 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=148, PETRI_PLACES=66, PETRI_TRANSITIONS=67} [2024-11-28 02:37:21,452 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, -8 predicate places. [2024-11-28 02:37:21,452 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 67 transitions, 148 flow [2024-11-28 02:37:21,452 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:37:21,452 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:37:21,453 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-28 02:37:21,453 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 02:37:21,454 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-28 02:37:21,454 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:37:21,455 INFO L85 PathProgramCache]: Analyzing trace with hash 27057421, now seen corresponding path program 1 times [2024-11-28 02:37:21,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:37:21,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297335771] [2024-11-28 02:37:21,455 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:37:21,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:37:21,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:37:21,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:37:21,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:37:21,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297335771] [2024-11-28 02:37:21,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297335771] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:37:21,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:37:21,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 02:37:21,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024628105] [2024-11-28 02:37:21,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:37:21,750 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 02:37:21,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:37:21,750 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 02:37:21,751 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 02:37:21,890 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 79 [2024-11-28 02:37:21,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 67 transitions, 148 flow. Second operand has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:37:21,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:37:21,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 79 [2024-11-28 02:37:21,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:37:22,898 INFO L124 PetriNetUnfolderBase]: 4706/6957 cut-off events. [2024-11-28 02:37:22,899 INFO L125 PetriNetUnfolderBase]: For 78/78 co-relation queries the response was YES. [2024-11-28 02:37:22,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13504 conditions, 6957 events. 4706/6957 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 39730 event pairs, 3616 based on Foata normal form. 0/4970 useless extension candidates. Maximal degree in co-relation 13480. Up to 6441 conditions per place. [2024-11-28 02:37:22,946 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 47 selfloop transitions, 7 changer transitions 0/73 dead transitions. [2024-11-28 02:37:22,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 73 transitions, 274 flow [2024-11-28 02:37:22,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 02:37:22,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 02:37:22,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 180 transitions. [2024-11-28 02:37:22,950 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45569620253164556 [2024-11-28 02:37:22,950 INFO L175 Difference]: Start difference. First operand has 66 places, 67 transitions, 148 flow. Second operand 5 states and 180 transitions. [2024-11-28 02:37:22,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 73 transitions, 274 flow [2024-11-28 02:37:22,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 73 transitions, 260 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-28 02:37:22,957 INFO L231 Difference]: Finished difference. Result has 70 places, 73 transitions, 193 flow [2024-11-28 02:37:22,958 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=193, PETRI_PLACES=70, PETRI_TRANSITIONS=73} [2024-11-28 02:37:22,958 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, -4 predicate places. [2024-11-28 02:37:22,959 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 73 transitions, 193 flow [2024-11-28 02:37:22,959 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:37:22,959 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:37:22,959 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-28 02:37:22,959 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-28 02:37:22,959 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-28 02:37:22,960 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:37:22,960 INFO L85 PathProgramCache]: Analyzing trace with hash 232405179, now seen corresponding path program 1 times [2024-11-28 02:37:22,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:37:22,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449823440] [2024-11-28 02:37:22,960 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:37:22,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:37:22,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:37:23,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:37:23,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:37:23,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449823440] [2024-11-28 02:37:23,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449823440] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:37:23,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446344099] [2024-11-28 02:37:23,354 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:37:23,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:37:23,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee544f9f-3a83-4898-af4e-8043c9156aab/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:37:23,358 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee544f9f-3a83-4898-af4e-8043c9156aab/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:37:23,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee544f9f-3a83-4898-af4e-8043c9156aab/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 02:37:23,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:37:23,472 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 02:37:23,478 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:37:23,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-28 02:37:23,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:37:23,756 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:37:23,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:37:23,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446344099] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:37:23,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:37:23,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-28 02:37:23,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045707671] [2024-11-28 02:37:23,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:37:23,992 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 02:37:23,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:37:23,993 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 02:37:23,993 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-11-28 02:37:24,456 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 79 [2024-11-28 02:37:24,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 73 transitions, 193 flow. Second operand has 13 states, 13 states have (on average 26.307692307692307) internal successors, (342), 13 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:37:24,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:37:24,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 79 [2024-11-28 02:37:24,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:37:25,484 INFO L124 PetriNetUnfolderBase]: 4706/6956 cut-off events. [2024-11-28 02:37:25,484 INFO L125 PetriNetUnfolderBase]: For 79/79 co-relation queries the response was YES. [2024-11-28 02:37:25,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13517 conditions, 6956 events. 4706/6956 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 39653 event pairs, 3616 based on Foata normal form. 0/4973 useless extension candidates. Maximal degree in co-relation 13476. Up to 6434 conditions per place. [2024-11-28 02:37:25,522 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 41 selfloop transitions, 12 changer transitions 0/72 dead transitions. [2024-11-28 02:37:25,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 72 transitions, 295 flow [2024-11-28 02:37:25,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 02:37:25,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 02:37:25,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 229 transitions. [2024-11-28 02:37:25,525 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4141048824593128 [2024-11-28 02:37:25,526 INFO L175 Difference]: Start difference. First operand has 70 places, 73 transitions, 193 flow. Second operand 7 states and 229 transitions. [2024-11-28 02:37:25,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 72 transitions, 295 flow [2024-11-28 02:37:25,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 72 transitions, 294 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 02:37:25,529 INFO L231 Difference]: Finished difference. Result has 74 places, 72 transitions, 212 flow [2024-11-28 02:37:25,529 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=212, PETRI_PLACES=74, PETRI_TRANSITIONS=72} [2024-11-28 02:37:25,530 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 0 predicate places. [2024-11-28 02:37:25,530 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 72 transitions, 212 flow [2024-11-28 02:37:25,530 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 26.307692307692307) internal successors, (342), 13 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:37:25,530 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:37:25,530 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:37:25,540 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee544f9f-3a83-4898-af4e-8043c9156aab/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 02:37:25,731 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee544f9f-3a83-4898-af4e-8043c9156aab/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:37:25,731 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-28 02:37:25,731 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:37:25,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1382119418, now seen corresponding path program 1 times [2024-11-28 02:37:25,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:37:25,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803399718] [2024-11-28 02:37:25,731 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:37:25,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:37:25,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:37:25,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:37:25,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:37:25,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803399718] [2024-11-28 02:37:25,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803399718] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:37:25,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:37:25,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 02:37:25,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532761577] [2024-11-28 02:37:25,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:37:25,840 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 02:37:25,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:37:25,840 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 02:37:25,840 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:37:25,855 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 79 [2024-11-28 02:37:25,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 72 transitions, 212 flow. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:37:25,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:37:25,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 79 [2024-11-28 02:37:25,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:37:26,536 INFO L124 PetriNetUnfolderBase]: 4706/6960 cut-off events. [2024-11-28 02:37:26,537 INFO L125 PetriNetUnfolderBase]: For 82/82 co-relation queries the response was YES. [2024-11-28 02:37:26,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13547 conditions, 6960 events. 4706/6960 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 39662 event pairs, 3616 based on Foata normal form. 1/4978 useless extension candidates. Maximal degree in co-relation 13480. Up to 6443 conditions per place. [2024-11-28 02:37:26,570 INFO L140 encePairwiseOnDemand]: 75/79 looper letters, 50 selfloop transitions, 2 changer transitions 5/76 dead transitions. [2024-11-28 02:37:26,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 76 transitions, 354 flow [2024-11-28 02:37:26,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 02:37:26,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 02:37:26,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 161 transitions. [2024-11-28 02:37:26,571 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.509493670886076 [2024-11-28 02:37:26,572 INFO L175 Difference]: Start difference. First operand has 74 places, 72 transitions, 212 flow. Second operand 4 states and 161 transitions. [2024-11-28 02:37:26,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 76 transitions, 354 flow [2024-11-28 02:37:26,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 76 transitions, 310 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-11-28 02:37:26,574 INFO L231 Difference]: Finished difference. Result has 72 places, 71 transitions, 183 flow [2024-11-28 02:37:26,574 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=183, PETRI_PLACES=72, PETRI_TRANSITIONS=71} [2024-11-28 02:37:26,576 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, -2 predicate places. [2024-11-28 02:37:26,578 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 71 transitions, 183 flow [2024-11-28 02:37:26,578 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:37:26,578 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:37:26,578 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:37:26,578 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-28 02:37:26,578 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-28 02:37:26,579 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:37:26,579 INFO L85 PathProgramCache]: Analyzing trace with hash 39872770, now seen corresponding path program 1 times [2024-11-28 02:37:26,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:37:26,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325943873] [2024-11-28 02:37:26,580 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:37:26,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:37:26,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:37:26,927 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:37:26,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:37:26,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325943873] [2024-11-28 02:37:26,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325943873] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:37:26,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201742983] [2024-11-28 02:37:26,928 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:37:26,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:37:26,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee544f9f-3a83-4898-af4e-8043c9156aab/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:37:26,930 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee544f9f-3a83-4898-af4e-8043c9156aab/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:37:26,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee544f9f-3a83-4898-af4e-8043c9156aab/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 02:37:27,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:37:27,027 INFO L256 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-28 02:37:27,029 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:37:27,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-28 02:37:27,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:37:27,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-28 02:37:27,146 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 02:37:27,149 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-28 02:37:27,224 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:37:27,225 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:37:27,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2024-11-28 02:37:27,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:37:27,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201742983] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:37:27,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:37:27,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-28 02:37:27,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567888044] [2024-11-28 02:37:27,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:37:27,493 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 02:37:27,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:37:27,494 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 02:37:27,494 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-28 02:37:28,289 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 79 [2024-11-28 02:37:28,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 71 transitions, 183 flow. Second operand has 13 states, 13 states have (on average 23.692307692307693) internal successors, (308), 13 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:37:28,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:37:28,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 79 [2024-11-28 02:37:28,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:37:29,825 INFO L124 PetriNetUnfolderBase]: 9879/14505 cut-off events. [2024-11-28 02:37:29,826 INFO L125 PetriNetUnfolderBase]: For 79/79 co-relation queries the response was YES. [2024-11-28 02:37:29,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28156 conditions, 14505 events. 9879/14505 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 89835 event pairs, 1591 based on Foata normal form. 0/10824 useless extension candidates. Maximal degree in co-relation 28140. Up to 5486 conditions per place. [2024-11-28 02:37:29,891 INFO L140 encePairwiseOnDemand]: 68/79 looper letters, 103 selfloop transitions, 11 changer transitions 0/130 dead transitions. [2024-11-28 02:37:29,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 130 transitions, 533 flow [2024-11-28 02:37:29,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 02:37:29,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 02:37:29,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 315 transitions. [2024-11-28 02:37:29,895 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4430379746835443 [2024-11-28 02:37:29,895 INFO L175 Difference]: Start difference. First operand has 72 places, 71 transitions, 183 flow. Second operand 9 states and 315 transitions. [2024-11-28 02:37:29,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 130 transitions, 533 flow [2024-11-28 02:37:29,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 130 transitions, 523 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-28 02:37:29,900 INFO L231 Difference]: Finished difference. Result has 77 places, 73 transitions, 215 flow [2024-11-28 02:37:29,901 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=215, PETRI_PLACES=77, PETRI_TRANSITIONS=73} [2024-11-28 02:37:29,904 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 3 predicate places. [2024-11-28 02:37:29,904 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 73 transitions, 215 flow [2024-11-28 02:37:29,904 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 23.692307692307693) internal successors, (308), 13 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:37:29,904 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:37:29,904 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:37:29,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee544f9f-3a83-4898-af4e-8043c9156aab/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-28 02:37:30,104 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee544f9f-3a83-4898-af4e-8043c9156aab/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-28 02:37:30,105 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-28 02:37:30,106 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:37:30,106 INFO L85 PathProgramCache]: Analyzing trace with hash 39872769, now seen corresponding path program 1 times [2024-11-28 02:37:30,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:37:30,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030636396] [2024-11-28 02:37:30,106 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:37:30,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:37:30,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:37:30,222 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 02:37:30,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:37:30,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030636396] [2024-11-28 02:37:30,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030636396] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:37:30,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:37:30,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 02:37:30,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693268176] [2024-11-28 02:37:30,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:37:30,223 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 02:37:30,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:37:30,224 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 02:37:30,224 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:37:30,279 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 79 [2024-11-28 02:37:30,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 73 transitions, 215 flow. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:37:30,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:37:30,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 79 [2024-11-28 02:37:30,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:37:31,404 INFO L124 PetriNetUnfolderBase]: 11413/15792 cut-off events. [2024-11-28 02:37:31,404 INFO L125 PetriNetUnfolderBase]: For 3298/3462 co-relation queries the response was YES. [2024-11-28 02:37:31,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34021 conditions, 15792 events. 11413/15792 cut-off events. For 3298/3462 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 80687 event pairs, 8968 based on Foata normal form. 443/12533 useless extension candidates. Maximal degree in co-relation 33973. Up to 15520 conditions per place. [2024-11-28 02:37:31,470 INFO L140 encePairwiseOnDemand]: 70/79 looper letters, 54 selfloop transitions, 4 changer transitions 0/67 dead transitions. [2024-11-28 02:37:31,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 67 transitions, 319 flow [2024-11-28 02:37:31,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 02:37:31,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 02:37:31,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 136 transitions. [2024-11-28 02:37:31,473 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34430379746835443 [2024-11-28 02:37:31,473 INFO L175 Difference]: Start difference. First operand has 77 places, 73 transitions, 215 flow. Second operand 5 states and 136 transitions. [2024-11-28 02:37:31,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 67 transitions, 319 flow [2024-11-28 02:37:31,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 67 transitions, 316 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 02:37:31,478 INFO L231 Difference]: Finished difference. Result has 73 places, 67 transitions, 208 flow [2024-11-28 02:37:31,478 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=208, PETRI_PLACES=73, PETRI_TRANSITIONS=67} [2024-11-28 02:37:31,478 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, -1 predicate places. [2024-11-28 02:37:31,479 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 67 transitions, 208 flow [2024-11-28 02:37:31,479 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:37:31,479 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:37:31,479 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:37:31,479 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-28 02:37:31,479 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-28 02:37:31,480 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:37:31,480 INFO L85 PathProgramCache]: Analyzing trace with hash -360228640, now seen corresponding path program 1 times [2024-11-28 02:37:31,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:37:31,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084367715] [2024-11-28 02:37:31,480 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:37:31,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:37:31,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:37:31,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:37:31,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:37:31,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084367715] [2024-11-28 02:37:31,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084367715] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:37:31,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455807228] [2024-11-28 02:37:31,613 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:37:31,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:37:31,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee544f9f-3a83-4898-af4e-8043c9156aab/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:37:31,615 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee544f9f-3a83-4898-af4e-8043c9156aab/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:37:31,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee544f9f-3a83-4898-af4e-8043c9156aab/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 02:37:31,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:37:31,699 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 02:37:31,700 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:37:31,769 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:37:31,769 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:37:31,847 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:37:31,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455807228] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:37:31,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:37:31,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-28 02:37:31,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716008937] [2024-11-28 02:37:31,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:37:31,848 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 02:37:31,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:37:31,849 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 02:37:31,849 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-11-28 02:37:31,996 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 79 [2024-11-28 02:37:31,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 67 transitions, 208 flow. Second operand has 14 states, 14 states have (on average 27.857142857142858) internal successors, (390), 14 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:37:31,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:37:31,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 79 [2024-11-28 02:37:31,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:37:33,501 INFO L124 PetriNetUnfolderBase]: 11738/16939 cut-off events. [2024-11-28 02:37:33,502 INFO L125 PetriNetUnfolderBase]: For 3744/3792 co-relation queries the response was YES. [2024-11-28 02:37:33,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36353 conditions, 16939 events. 11738/16939 cut-off events. For 3744/3792 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 101423 event pairs, 8209 based on Foata normal form. 0/12449 useless extension candidates. Maximal degree in co-relation 28422. Up to 12669 conditions per place. [2024-11-28 02:37:33,569 INFO L140 encePairwiseOnDemand]: 69/79 looper letters, 113 selfloop transitions, 14 changer transitions 0/138 dead transitions. [2024-11-28 02:37:33,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 138 transitions, 690 flow [2024-11-28 02:37:33,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 02:37:33,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-28 02:37:33,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 321 transitions. [2024-11-28 02:37:33,571 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5079113924050633 [2024-11-28 02:37:33,571 INFO L175 Difference]: Start difference. First operand has 73 places, 67 transitions, 208 flow. Second operand 8 states and 321 transitions. [2024-11-28 02:37:33,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 138 transitions, 690 flow [2024-11-28 02:37:33,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 138 transitions, 680 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-28 02:37:33,577 INFO L231 Difference]: Finished difference. Result has 83 places, 78 transitions, 330 flow [2024-11-28 02:37:33,577 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=330, PETRI_PLACES=83, PETRI_TRANSITIONS=78} [2024-11-28 02:37:33,578 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 9 predicate places. [2024-11-28 02:37:33,578 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 78 transitions, 330 flow [2024-11-28 02:37:33,578 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 27.857142857142858) internal successors, (390), 14 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:37:33,578 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:37:33,578 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:37:33,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee544f9f-3a83-4898-af4e-8043c9156aab/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-28 02:37:33,782 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee544f9f-3a83-4898-af4e-8043c9156aab/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-28 02:37:33,782 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-28 02:37:33,783 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:37:33,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1855327294, now seen corresponding path program 1 times [2024-11-28 02:37:33,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:37:33,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349462923] [2024-11-28 02:37:33,783 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:37:33,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:37:33,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:37:33,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:37:33,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:37:33,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349462923] [2024-11-28 02:37:33,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349462923] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:37:33,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:37:33,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 02:37:33,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218434792] [2024-11-28 02:37:33,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:37:33,878 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 02:37:33,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:37:33,878 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 02:37:33,878 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:37:33,918 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 79 [2024-11-28 02:37:33,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 78 transitions, 330 flow. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:37:33,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:37:33,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 79 [2024-11-28 02:37:33,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:37:34,662 INFO L124 PetriNetUnfolderBase]: 7958/11708 cut-off events. [2024-11-28 02:37:34,662 INFO L125 PetriNetUnfolderBase]: For 4783/5025 co-relation queries the response was YES. [2024-11-28 02:37:34,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26790 conditions, 11708 events. 7958/11708 cut-off events. For 4783/5025 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 69884 event pairs, 5983 based on Foata normal form. 0/9459 useless extension candidates. Maximal degree in co-relation 26723. Up to 10893 conditions per place. [2024-11-28 02:37:34,702 INFO L140 encePairwiseOnDemand]: 74/79 looper letters, 58 selfloop transitions, 5 changer transitions 0/75 dead transitions. [2024-11-28 02:37:34,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 75 transitions, 450 flow [2024-11-28 02:37:34,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 02:37:34,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 02:37:34,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 147 transitions. [2024-11-28 02:37:34,704 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4651898734177215 [2024-11-28 02:37:34,704 INFO L175 Difference]: Start difference. First operand has 83 places, 78 transitions, 330 flow. Second operand 4 states and 147 transitions. [2024-11-28 02:37:34,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 75 transitions, 450 flow [2024-11-28 02:37:34,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 75 transitions, 448 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 02:37:34,707 INFO L231 Difference]: Finished difference. Result has 82 places, 75 transitions, 332 flow [2024-11-28 02:37:34,707 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=332, PETRI_PLACES=82, PETRI_TRANSITIONS=75} [2024-11-28 02:37:34,708 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 8 predicate places. [2024-11-28 02:37:34,708 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 75 transitions, 332 flow [2024-11-28 02:37:34,708 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:37:34,708 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:37:34,708 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:37:34,708 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-28 02:37:34,708 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-28 02:37:34,709 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:37:34,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1855327293, now seen corresponding path program 1 times [2024-11-28 02:37:34,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:37:34,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507707808] [2024-11-28 02:37:34,709 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:37:34,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:37:34,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:37:34,832 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:37:34,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:37:34,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507707808] [2024-11-28 02:37:34,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507707808] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:37:34,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:37:34,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 02:37:34,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996416429] [2024-11-28 02:37:34,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:37:34,834 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 02:37:34,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:37:34,834 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 02:37:34,835 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 02:37:34,939 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 79 [2024-11-28 02:37:34,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 75 transitions, 332 flow. Second operand has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:37:34,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:37:34,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 79 [2024-11-28 02:37:34,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:37:36,466 INFO L124 PetriNetUnfolderBase]: 14485/21019 cut-off events. [2024-11-28 02:37:36,466 INFO L125 PetriNetUnfolderBase]: For 8797/9454 co-relation queries the response was YES. [2024-11-28 02:37:36,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48902 conditions, 21019 events. 14485/21019 cut-off events. For 8797/9454 co-relation queries the response was YES. Maximal size of possible extension queue 704. Compared 130280 event pairs, 8526 based on Foata normal form. 0/17722 useless extension candidates. Maximal degree in co-relation 35103. Up to 12329 conditions per place. [2024-11-28 02:37:36,556 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 141 selfloop transitions, 12 changer transitions 0/164 dead transitions. [2024-11-28 02:37:36,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 164 transitions, 884 flow [2024-11-28 02:37:36,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 02:37:36,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 02:37:36,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 285 transitions. [2024-11-28 02:37:36,558 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6012658227848101 [2024-11-28 02:37:36,558 INFO L175 Difference]: Start difference. First operand has 82 places, 75 transitions, 332 flow. Second operand 6 states and 285 transitions. [2024-11-28 02:37:36,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 164 transitions, 884 flow [2024-11-28 02:37:36,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 164 transitions, 878 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 02:37:36,566 INFO L231 Difference]: Finished difference. Result has 88 places, 81 transitions, 402 flow [2024-11-28 02:37:36,567 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=402, PETRI_PLACES=88, PETRI_TRANSITIONS=81} [2024-11-28 02:37:36,567 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 14 predicate places. [2024-11-28 02:37:36,567 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 81 transitions, 402 flow [2024-11-28 02:37:36,567 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:37:36,567 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:37:36,567 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:37:36,567 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-28 02:37:36,568 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-28 02:37:36,568 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:37:36,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1496865756, now seen corresponding path program 2 times [2024-11-28 02:37:36,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:37:36,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687736741] [2024-11-28 02:37:36,568 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:37:36,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:37:36,589 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:37:36,589 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:37:36,922 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 02:37:36,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:37:36,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687736741] [2024-11-28 02:37:36,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687736741] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:37:36,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730074736] [2024-11-28 02:37:36,923 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:37:36,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:37:36,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee544f9f-3a83-4898-af4e-8043c9156aab/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:37:36,925 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee544f9f-3a83-4898-af4e-8043c9156aab/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:37:36,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee544f9f-3a83-4898-af4e-8043c9156aab/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 02:37:37,016 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:37:37,016 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:37:37,017 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-28 02:37:37,019 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:37:37,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-28 02:37:37,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:37:37,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-28 02:37:37,131 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-28 02:37:37,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-28 02:37:37,207 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 02:37:37,207 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:37:37,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2024-11-28 02:37:37,526 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 02:37:37,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730074736] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:37:37,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:37:37,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 17 [2024-11-28 02:37:37,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135154008] [2024-11-28 02:37:37,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:37:37,527 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-28 02:37:37,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:37:37,528 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-28 02:37:37,528 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2024-11-28 02:37:39,142 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 79 [2024-11-28 02:37:39,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 81 transitions, 402 flow. Second operand has 19 states, 19 states have (on average 21.05263157894737) internal successors, (400), 19 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:37:39,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:37:39,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 79 [2024-11-28 02:37:39,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:37:44,417 INFO L124 PetriNetUnfolderBase]: 36439/50033 cut-off events. [2024-11-28 02:37:44,417 INFO L125 PetriNetUnfolderBase]: For 40462/41238 co-relation queries the response was YES. [2024-11-28 02:37:44,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129596 conditions, 50033 events. 36439/50033 cut-off events. For 40462/41238 co-relation queries the response was YES. Maximal size of possible extension queue 981. Compared 290357 event pairs, 7568 based on Foata normal form. 0/41187 useless extension candidates. Maximal degree in co-relation 112868. Up to 16932 conditions per place. [2024-11-28 02:37:44,625 INFO L140 encePairwiseOnDemand]: 68/79 looper letters, 208 selfloop transitions, 23 changer transitions 0/237 dead transitions. [2024-11-28 02:37:44,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 237 transitions, 1524 flow [2024-11-28 02:37:44,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 02:37:44,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-28 02:37:44,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 494 transitions. [2024-11-28 02:37:44,627 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39082278481012656 [2024-11-28 02:37:44,627 INFO L175 Difference]: Start difference. First operand has 88 places, 81 transitions, 402 flow. Second operand 16 states and 494 transitions. [2024-11-28 02:37:44,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 237 transitions, 1524 flow [2024-11-28 02:37:44,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 237 transitions, 1514 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 02:37:44,659 INFO L231 Difference]: Finished difference. Result has 105 places, 88 transitions, 519 flow [2024-11-28 02:37:44,659 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=519, PETRI_PLACES=105, PETRI_TRANSITIONS=88} [2024-11-28 02:37:44,659 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 31 predicate places. [2024-11-28 02:37:44,659 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 88 transitions, 519 flow [2024-11-28 02:37:44,660 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 21.05263157894737) internal successors, (400), 19 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:37:44,660 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:37:44,660 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:37:44,669 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee544f9f-3a83-4898-af4e-8043c9156aab/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-28 02:37:44,864 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee544f9f-3a83-4898-af4e-8043c9156aab/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-28 02:37:44,864 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-28 02:37:44,865 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:37:44,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1628719058, now seen corresponding path program 1 times [2024-11-28 02:37:44,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:37:44,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707324238] [2024-11-28 02:37:44,865 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:37:44,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:37:44,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:37:45,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:37:45,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:37:45,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707324238] [2024-11-28 02:37:45,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707324238] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:37:45,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:37:45,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 02:37:45,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625654898] [2024-11-28 02:37:45,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:37:45,218 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 02:37:45,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:37:45,220 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 02:37:45,220 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-28 02:37:45,623 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 79 [2024-11-28 02:37:45,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 88 transitions, 519 flow. Second operand has 7 states, 7 states have (on average 23.714285714285715) internal successors, (166), 7 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) [2024-11-28 02:37:45,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:37:45,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 79 [2024-11-28 02:37:45,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:37:49,309 INFO L124 PetriNetUnfolderBase]: 29355/41979 cut-off events. [2024-11-28 02:37:49,309 INFO L125 PetriNetUnfolderBase]: For 54380/57065 co-relation queries the response was YES. [2024-11-28 02:37:49,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115455 conditions, 41979 events. 29355/41979 cut-off events. For 54380/57065 co-relation queries the response was YES. Maximal size of possible extension queue 1166. Compared 276428 event pairs, 8244 based on Foata normal form. 774/36242 useless extension candidates. Maximal degree in co-relation 104125. Up to 23854 conditions per place. [2024-11-28 02:37:49,487 INFO L140 encePairwiseOnDemand]: 70/79 looper letters, 102 selfloop transitions, 13 changer transitions 0/124 dead transitions. [2024-11-28 02:37:49,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 124 transitions, 937 flow [2024-11-28 02:37:49,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 02:37:49,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 02:37:49,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 203 transitions. [2024-11-28 02:37:49,489 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4282700421940928 [2024-11-28 02:37:49,489 INFO L175 Difference]: Start difference. First operand has 105 places, 88 transitions, 519 flow. Second operand 6 states and 203 transitions. [2024-11-28 02:37:49,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 124 transitions, 937 flow [2024-11-28 02:37:49,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 124 transitions, 871 flow, removed 8 selfloop flow, removed 12 redundant places. [2024-11-28 02:37:49,509 INFO L231 Difference]: Finished difference. Result has 99 places, 89 transitions, 509 flow [2024-11-28 02:37:49,509 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=459, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=509, PETRI_PLACES=99, PETRI_TRANSITIONS=89} [2024-11-28 02:37:49,510 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 25 predicate places. [2024-11-28 02:37:49,510 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 89 transitions, 509 flow [2024-11-28 02:37:49,510 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.714285714285715) internal successors, (166), 7 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) [2024-11-28 02:37:49,510 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:37:49,510 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:37:49,510 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-28 02:37:49,510 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-28 02:37:49,511 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:37:49,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1593965583, now seen corresponding path program 1 times [2024-11-28 02:37:49,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:37:49,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838370934] [2024-11-28 02:37:49,511 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:37:49,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:37:49,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:37:49,722 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:37:49,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:37:49,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838370934] [2024-11-28 02:37:49,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838370934] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:37:49,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905549343] [2024-11-28 02:37:49,723 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:37:49,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:37:49,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee544f9f-3a83-4898-af4e-8043c9156aab/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:37:49,725 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee544f9f-3a83-4898-af4e-8043c9156aab/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:37:49,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee544f9f-3a83-4898-af4e-8043c9156aab/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 02:37:49,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:37:49,817 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 02:37:49,818 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:37:49,896 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 23 treesize of output 7 [2024-11-28 02:37:49,914 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:37:49,915 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:37:49,955 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 25 treesize of output 9 [2024-11-28 02:37:50,021 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:37:50,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905549343] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:37:50,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:37:50,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2024-11-28 02:37:50,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848000395] [2024-11-28 02:37:50,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:37:50,024 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 02:37:50,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:37:50,024 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 02:37:50,025 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-11-28 02:37:50,627 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 79 [2024-11-28 02:37:50,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 89 transitions, 509 flow. Second operand has 15 states, 15 states have (on average 28.0) internal successors, (420), 15 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:37:50,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:37:50,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 79 [2024-11-28 02:37:50,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:37:57,703 INFO L124 PetriNetUnfolderBase]: 50612/71462 cut-off events. [2024-11-28 02:37:57,703 INFO L125 PetriNetUnfolderBase]: For 80883/85912 co-relation queries the response was YES. [2024-11-28 02:37:57,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208538 conditions, 71462 events. 50612/71462 cut-off events. For 80883/85912 co-relation queries the response was YES. Maximal size of possible extension queue 1575. Compared 470893 event pairs, 19266 based on Foata normal form. 0/61997 useless extension candidates. Maximal degree in co-relation 184447. Up to 24529 conditions per place. [2024-11-28 02:37:58,278 INFO L140 encePairwiseOnDemand]: 65/79 looper letters, 288 selfloop transitions, 40 changer transitions 0/337 dead transitions. [2024-11-28 02:37:58,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 337 transitions, 2174 flow [2024-11-28 02:37:58,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 02:37:58,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-28 02:37:58,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 660 transitions. [2024-11-28 02:37:58,281 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5221518987341772 [2024-11-28 02:37:58,281 INFO L175 Difference]: Start difference. First operand has 99 places, 89 transitions, 509 flow. Second operand 16 states and 660 transitions. [2024-11-28 02:37:58,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 337 transitions, 2174 flow [2024-11-28 02:37:58,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 337 transitions, 2162 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-28 02:37:58,496 INFO L231 Difference]: Finished difference. Result has 115 places, 100 transitions, 690 flow [2024-11-28 02:37:58,496 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=497, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=690, PETRI_PLACES=115, PETRI_TRANSITIONS=100} [2024-11-28 02:37:58,497 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 41 predicate places. [2024-11-28 02:37:58,497 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 100 transitions, 690 flow [2024-11-28 02:37:58,497 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 28.0) internal successors, (420), 15 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:37:58,497 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:37:58,497 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:37:58,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee544f9f-3a83-4898-af4e-8043c9156aab/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-28 02:37:58,698 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee544f9f-3a83-4898-af4e-8043c9156aab/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:37:58,698 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-28 02:37:58,698 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:37:58,698 INFO L85 PathProgramCache]: Analyzing trace with hash -558046207, now seen corresponding path program 1 times [2024-11-28 02:37:58,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:37:58,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849464807] [2024-11-28 02:37:58,698 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:37:58,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:37:58,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:37:58,799 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:37:58,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:37:58,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849464807] [2024-11-28 02:37:58,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849464807] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:37:58,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603502432] [2024-11-28 02:37:58,800 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:37:58,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:37:58,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee544f9f-3a83-4898-af4e-8043c9156aab/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:37:58,802 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee544f9f-3a83-4898-af4e-8043c9156aab/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:37:58,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee544f9f-3a83-4898-af4e-8043c9156aab/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 02:37:58,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:37:58,887 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 02:37:58,888 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:37:58,972 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:37:58,973 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:37:59,041 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:37:59,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603502432] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:37:59,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:37:59,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-28 02:37:59,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659287021] [2024-11-28 02:37:59,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:37:59,042 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 02:37:59,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:37:59,043 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 02:37:59,044 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-28 02:37:59,139 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 79 [2024-11-28 02:37:59,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 100 transitions, 690 flow. Second operand has 14 states, 14 states have (on average 28.214285714285715) internal successors, (395), 14 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:37:59,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:37:59,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 79 [2024-11-28 02:37:59,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:38:05,770 INFO L124 PetriNetUnfolderBase]: 46010/68297 cut-off events. [2024-11-28 02:38:05,770 INFO L125 PetriNetUnfolderBase]: For 106434/109699 co-relation queries the response was YES. [2024-11-28 02:38:05,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208595 conditions, 68297 events. 46010/68297 cut-off events. For 106434/109699 co-relation queries the response was YES. Maximal size of possible extension queue 1718. Compared 495366 event pairs, 30792 based on Foata normal form. 1087/61287 useless extension candidates. Maximal degree in co-relation 193057. Up to 55482 conditions per place. [2024-11-28 02:38:06,248 INFO L140 encePairwiseOnDemand]: 69/79 looper letters, 146 selfloop transitions, 19 changer transitions 0/176 dead transitions. [2024-11-28 02:38:06,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 176 transitions, 1349 flow [2024-11-28 02:38:06,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 02:38:06,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-28 02:38:06,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 326 transitions. [2024-11-28 02:38:06,250 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5158227848101266 [2024-11-28 02:38:06,250 INFO L175 Difference]: Start difference. First operand has 115 places, 100 transitions, 690 flow. Second operand 8 states and 326 transitions. [2024-11-28 02:38:06,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 176 transitions, 1349 flow [2024-11-28 02:38:06,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 176 transitions, 1272 flow, removed 14 selfloop flow, removed 10 redundant places. [2024-11-28 02:38:06,507 INFO L231 Difference]: Finished difference. Result has 115 places, 107 transitions, 753 flow [2024-11-28 02:38:06,507 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=629, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=753, PETRI_PLACES=115, PETRI_TRANSITIONS=107} [2024-11-28 02:38:06,507 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 41 predicate places. [2024-11-28 02:38:06,507 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 107 transitions, 753 flow [2024-11-28 02:38:06,508 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 28.214285714285715) internal successors, (395), 14 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:38:06,508 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:38:06,508 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:38:06,513 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee544f9f-3a83-4898-af4e-8043c9156aab/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 02:38:06,708 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee544f9f-3a83-4898-af4e-8043c9156aab/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-28 02:38:06,708 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread3Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-28 02:38:06,708 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:38:06,709 INFO L85 PathProgramCache]: Analyzing trace with hash 924870357, now seen corresponding path program 1 times [2024-11-28 02:38:06,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:38:06,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277164107] [2024-11-28 02:38:06,709 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:38:06,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:38:06,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:38:06,853 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 02:38:06,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:38:06,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277164107] [2024-11-28 02:38:06,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277164107] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:38:06,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:38:06,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 02:38:06,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220774695] [2024-11-28 02:38:06,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:38:06,854 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 02:38:06,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:38:06,855 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 02:38:06,855 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 02:38:06,958 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 79 [2024-11-28 02:38:06,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 107 transitions, 753 flow. Second operand has 6 states, 6 states have (on average 28.5) internal successors, (171), 6 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:38:06,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:38:06,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 79 [2024-11-28 02:38:06,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 02:38:13,534 INFO L124 PetriNetUnfolderBase]: 41414/60746 cut-off events. [2024-11-28 02:38:13,535 INFO L125 PetriNetUnfolderBase]: For 106545/111170 co-relation queries the response was YES. [2024-11-28 02:38:13,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189777 conditions, 60746 events. 41414/60746 cut-off events. For 106545/111170 co-relation queries the response was YES. Maximal size of possible extension queue 1376. Compared 420729 event pairs, 28134 based on Foata normal form. 1118/54948 useless extension candidates. Maximal degree in co-relation 103299. Up to 46440 conditions per place. [2024-11-28 02:38:13,906 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 184 selfloop transitions, 11 changer transitions 0/206 dead transitions. [2024-11-28 02:38:13,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 206 transitions, 1687 flow [2024-11-28 02:38:13,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 02:38:13,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 02:38:13,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 269 transitions. [2024-11-28 02:38:13,908 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5675105485232067 [2024-11-28 02:38:13,908 INFO L175 Difference]: Start difference. First operand has 115 places, 107 transitions, 753 flow. Second operand 6 states and 269 transitions. [2024-11-28 02:38:13,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 206 transitions, 1687 flow [2024-11-28 02:38:14,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 206 transitions, 1656 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-11-28 02:38:14,103 INFO L231 Difference]: Finished difference. Result has 119 places, 112 transitions, 794 flow [2024-11-28 02:38:14,103 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=728, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=794, PETRI_PLACES=119, PETRI_TRANSITIONS=112} [2024-11-28 02:38:14,103 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 45 predicate places. [2024-11-28 02:38:14,103 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 112 transitions, 794 flow [2024-11-28 02:38:14,103 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.5) internal successors, (171), 6 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:38:14,103 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 02:38:14,104 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:38:14,104 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-28 02:38:14,104 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-28 02:38:14,104 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:38:14,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1516757862, now seen corresponding path program 1 times [2024-11-28 02:38:14,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:38:14,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804191586] [2024-11-28 02:38:14,104 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:38:14,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:38:14,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:38:14,219 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 02:38:14,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:38:14,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804191586] [2024-11-28 02:38:14,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804191586] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:38:14,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:38:14,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 02:38:14,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599002138] [2024-11-28 02:38:14,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:38:14,219 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 02:38:14,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:38:14,220 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 02:38:14,220 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 02:38:14,321 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 79 [2024-11-28 02:38:14,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 112 transitions, 794 flow. Second operand has 6 states, 6 states have (on average 28.166666666666668) internal successors, (169), 6 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) [2024-11-28 02:38:14,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 02:38:14,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 79 [2024-11-28 02:38:14,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand