./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 6497de01 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c624a3da-73fd-4127-b6a5-ffbe0f87f375/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c624a3da-73fd-4127-b6a5-ffbe0f87f375/bin/uautomizer-verify-LYvppIcaGC/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c624a3da-73fd-4127-b6a5-ffbe0f87f375/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c624a3da-73fd-4127-b6a5-ffbe0f87f375/bin/uautomizer-verify-LYvppIcaGC/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_c624a3da-73fd-4127-b6a5-ffbe0f87f375/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c624a3da-73fd-4127-b6a5-ffbe0f87f375/bin/uautomizer-verify-LYvppIcaGC --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-6497de0 [2024-11-24 01:45:21,924 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-24 01:45:22,024 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c624a3da-73fd-4127-b6a5-ffbe0f87f375/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-24 01:45:22,030 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-24 01:45:22,030 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-24 01:45:22,078 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-24 01:45:22,079 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-24 01:45:22,079 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-24 01:45:22,080 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-24 01:45:22,080 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-24 01:45:22,080 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-24 01:45:22,080 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-24 01:45:22,081 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-24 01:45:22,082 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-24 01:45:22,082 INFO L153 SettingsManager]: * Use SBE=true [2024-11-24 01:45:22,083 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-24 01:45:22,083 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-24 01:45:22,083 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-24 01:45:22,083 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-24 01:45:22,083 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-24 01:45:22,083 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-24 01:45:22,083 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-24 01:45:22,083 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-24 01:45:22,083 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-24 01:45:22,084 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-24 01:45:22,084 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-24 01:45:22,084 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-24 01:45:22,084 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-24 01:45:22,084 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-24 01:45:22,084 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-24 01:45:22,084 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-24 01:45:22,084 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-24 01:45:22,084 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-24 01:45:22,085 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 01:45:22,085 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-24 01:45:22,085 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-24 01:45:22,085 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-24 01:45:22,085 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-24 01:45:22,085 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 01:45:22,085 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-24 01:45:22,085 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-24 01:45:22,085 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-24 01:45:22,086 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-24 01:45:22,086 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-24 01:45:22,086 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-24 01:45:22,086 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-24 01:45:22,087 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-24 01:45:22,087 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_c624a3da-73fd-4127-b6a5-ffbe0f87f375/bin/uautomizer-verify-LYvppIcaGC 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 [2024-11-24 01:45:22,458 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-24 01:45:22,473 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-24 01:45:22,477 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-24 01:45:22,480 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-24 01:45:22,480 INFO L274 PluginConnector]: CDTParser initialized [2024-11-24 01:45:22,482 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c624a3da-73fd-4127-b6a5-ffbe0f87f375/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c [2024-11-24 01:45:25,698 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c624a3da-73fd-4127-b6a5-ffbe0f87f375/bin/uautomizer-verify-LYvppIcaGC/data/00e4a7a08/76f3cd1cec1d4c56b8946a7f615e05c2/FLAG7ee99756a [2024-11-24 01:45:26,119 INFO L384 CDTParser]: Found 1 translation units. [2024-11-24 01:45:26,123 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c624a3da-73fd-4127-b6a5-ffbe0f87f375/sv-benchmarks/c/weaver/popl20-bad-dot-product.wvr.c [2024-11-24 01:45:26,141 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c624a3da-73fd-4127-b6a5-ffbe0f87f375/bin/uautomizer-verify-LYvppIcaGC/data/00e4a7a08/76f3cd1cec1d4c56b8946a7f615e05c2/FLAG7ee99756a [2024-11-24 01:45:26,168 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c624a3da-73fd-4127-b6a5-ffbe0f87f375/bin/uautomizer-verify-LYvppIcaGC/data/00e4a7a08/76f3cd1cec1d4c56b8946a7f615e05c2 [2024-11-24 01:45:26,172 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-24 01:45:26,174 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-24 01:45:26,177 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-24 01:45:26,177 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-24 01:45:26,184 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-24 01:45:26,185 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 01:45:26" (1/1) ... [2024-11-24 01:45:26,188 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fa925b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:45:26, skipping insertion in model container [2024-11-24 01:45:26,188 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 01:45:26" (1/1) ... [2024-11-24 01:45:26,218 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-24 01:45:26,479 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-24 01:45:26,488 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-24 01:45:26,504 INFO L200 MainTranslator]: Completed pre-run [2024-11-24 01:45:26,559 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-24 01:45:26,582 INFO L204 MainTranslator]: Completed translation [2024-11-24 01:45:26,582 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:45:26 WrapperNode [2024-11-24 01:45:26,583 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-24 01:45:26,584 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-24 01:45:26,584 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-24 01:45:26,584 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-24 01:45:26,595 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:45:26" (1/1) ... [2024-11-24 01:45:26,609 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:45:26" (1/1) ... [2024-11-24 01:45:26,663 INFO L138 Inliner]: procedures = 25, calls = 41, calls flagged for inlining = 17, calls inlined = 23, statements flattened = 266 [2024-11-24 01:45:26,663 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-24 01:45:26,664 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-24 01:45:26,666 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-24 01:45:26,666 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-24 01:45:26,677 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:45:26" (1/1) ... [2024-11-24 01:45:26,677 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:45:26" (1/1) ... [2024-11-24 01:45:26,683 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:45:26" (1/1) ... [2024-11-24 01:45:26,708 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]. [2024-11-24 01:45:26,709 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:45:26" (1/1) ... [2024-11-24 01:45:26,709 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:45:26" (1/1) ... [2024-11-24 01:45:26,722 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:45:26" (1/1) ... [2024-11-24 01:45:26,724 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:45:26" (1/1) ... [2024-11-24 01:45:26,735 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:45:26" (1/1) ... [2024-11-24 01:45:26,737 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:45:26" (1/1) ... [2024-11-24 01:45:26,740 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:45:26" (1/1) ... [2024-11-24 01:45:26,747 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-24 01:45:26,751 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-24 01:45:26,752 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-24 01:45:26,752 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-24 01:45:26,753 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:45:26" (1/1) ... [2024-11-24 01:45:26,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 01:45:26,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c624a3da-73fd-4127-b6a5-ffbe0f87f375/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:45:26,798 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c624a3da-73fd-4127-b6a5-ffbe0f87f375/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-24 01:45:26,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c624a3da-73fd-4127-b6a5-ffbe0f87f375/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-24 01:45:26,840 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-24 01:45:26,840 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-24 01:45:26,840 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-24 01:45:26,840 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-24 01:45:26,840 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-24 01:45:26,840 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-24 01:45:26,841 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-24 01:45:26,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-24 01:45:26,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-24 01:45:26,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-24 01:45:26,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-24 01:45:26,841 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-24 01:45:26,841 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-24 01:45:26,841 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-24 01:45:26,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-24 01:45:26,841 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-24 01:45:26,841 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-24 01:45:26,842 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-24 01:45:26,845 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-24 01:45:26,968 INFO L234 CfgBuilder]: Building ICFG [2024-11-24 01:45:26,972 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-24 01:45:27,711 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-24 01:45:27,711 INFO L283 CfgBuilder]: Performing block encoding [2024-11-24 01:45:28,216 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-24 01:45:28,216 INFO L312 CfgBuilder]: Removed 8 assume(true) statements. [2024-11-24 01:45:28,217 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 01:45:28 BoogieIcfgContainer [2024-11-24 01:45:28,217 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-24 01:45:28,218 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-24 01:45:28,218 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-24 01:45:28,226 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-24 01:45:28,227 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 01:45:26" (1/3) ... [2024-11-24 01:45:28,227 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2392ac37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 01:45:28, skipping insertion in model container [2024-11-24 01:45:28,228 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:45:26" (2/3) ... [2024-11-24 01:45:28,230 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2392ac37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 01:45:28, skipping insertion in model container [2024-11-24 01:45:28,230 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 01:45:28" (3/3) ... [2024-11-24 01:45:28,231 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-bad-dot-product.wvr.c [2024-11-24 01:45:28,250 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-24 01:45:28,252 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. [2024-11-24 01:45:28,252 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-24 01:45:28,379 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-24 01:45:28,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 79 transitions, 179 flow [2024-11-24 01:45:28,465 INFO L124 PetriNetUnfolderBase]: 11/76 cut-off events. [2024-11-24 01:45:28,468 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-24 01:45:28,472 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. [2024-11-24 01:45:28,473 INFO L82 GeneralOperation]: Start removeDead. Operand has 78 places, 79 transitions, 179 flow [2024-11-24 01:45:28,477 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 75 transitions, 168 flow [2024-11-24 01:45:28,489 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-24 01:45:28,507 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;@6cf8f34e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-24 01:45:28,507 INFO L334 AbstractCegarLoop]: Starting to check reachability of 45 error locations. [2024-11-24 01:45:28,513 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-24 01:45:28,513 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-24 01:45:28,513 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-24 01:45:28,514 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:45:28,514 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-24 01:45:28,514 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-24 01:45:28,521 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:45:28,521 INFO L85 PathProgramCache]: Analyzing trace with hash 872810, now seen corresponding path program 1 times [2024-11-24 01:45:28,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:45:28,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33496617] [2024-11-24 01:45:28,530 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:45:28,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:45:28,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:45:28,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:45:28,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:45:28,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33496617] [2024-11-24 01:45:28,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33496617] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:45:28,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:45:28,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-24 01:45:28,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336644604] [2024-11-24 01:45:28,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:45:28,828 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-24 01:45:28,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:45:28,859 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-24 01:45:28,860 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-24 01:45:28,915 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 79 [2024-11-24 01:45:28,917 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) [2024-11-24 01:45:28,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:45:28,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 79 [2024-11-24 01:45:28,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:45:30,547 INFO L124 PetriNetUnfolderBase]: 4704/6952 cut-off events. [2024-11-24 01:45:30,548 INFO L125 PetriNetUnfolderBase]: For 326/326 co-relation queries the response was YES. [2024-11-24 01:45:30,573 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. [2024-11-24 01:45:30,631 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 45 selfloop transitions, 2 changer transitions 0/68 dead transitions. [2024-11-24 01:45:30,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 68 transitions, 248 flow [2024-11-24 01:45:30,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-24 01:45:30,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-24 01:45:30,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 128 transitions. [2024-11-24 01:45:30,650 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.540084388185654 [2024-11-24 01:45:30,653 INFO L175 Difference]: Start difference. First operand has 74 places, 75 transitions, 168 flow. Second operand 3 states and 128 transitions. [2024-11-24 01:45:30,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 68 transitions, 248 flow [2024-11-24 01:45:30,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 68 transitions, 236 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-24 01:45:30,672 INFO L231 Difference]: Finished difference. Result has 66 places, 68 transitions, 146 flow [2024-11-24 01:45:30,676 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} [2024-11-24 01:45:30,682 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, -8 predicate places. [2024-11-24 01:45:30,682 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 68 transitions, 146 flow [2024-11-24 01:45:30,682 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) [2024-11-24 01:45:30,682 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:45:30,682 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-24 01:45:30,683 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-24 01:45:30,683 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-24 01:45:30,683 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:45:30,684 INFO L85 PathProgramCache]: Analyzing trace with hash 872811, now seen corresponding path program 1 times [2024-11-24 01:45:30,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:45:30,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484416190] [2024-11-24 01:45:30,686 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:45:30,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:45:30,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:45:31,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:45:31,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:45:31,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484416190] [2024-11-24 01:45:31,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484416190] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:45:31,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:45:31,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-24 01:45:31,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156010062] [2024-11-24 01:45:31,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:45:31,194 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 01:45:31,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:45:31,195 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 01:45:31,195 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-24 01:45:31,283 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 79 [2024-11-24 01:45:31,284 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) [2024-11-24 01:45:31,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:45:31,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 79 [2024-11-24 01:45:31,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:45:32,316 INFO L124 PetriNetUnfolderBase]: 4704/6951 cut-off events. [2024-11-24 01:45:32,316 INFO L125 PetriNetUnfolderBase]: For 78/78 co-relation queries the response was YES. [2024-11-24 01:45:32,327 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. [2024-11-24 01:45:32,371 INFO L140 encePairwiseOnDemand]: 74/79 looper letters, 44 selfloop transitions, 4 changer transitions 0/67 dead transitions. [2024-11-24 01:45:32,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 67 transitions, 240 flow [2024-11-24 01:45:32,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 01:45:32,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-24 01:45:32,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 149 transitions. [2024-11-24 01:45:32,376 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47151898734177217 [2024-11-24 01:45:32,376 INFO L175 Difference]: Start difference. First operand has 66 places, 68 transitions, 146 flow. Second operand 4 states and 149 transitions. [2024-11-24 01:45:32,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 67 transitions, 240 flow [2024-11-24 01:45:32,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 67 transitions, 236 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-24 01:45:32,379 INFO L231 Difference]: Finished difference. Result has 66 places, 67 transitions, 148 flow [2024-11-24 01:45:32,380 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} [2024-11-24 01:45:32,380 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, -8 predicate places. [2024-11-24 01:45:32,380 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 67 transitions, 148 flow [2024-11-24 01:45:32,381 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) [2024-11-24 01:45:32,381 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:45:32,381 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-24 01:45:32,381 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-24 01:45:32,381 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-24 01:45:32,382 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:45:32,383 INFO L85 PathProgramCache]: Analyzing trace with hash 27057421, now seen corresponding path program 1 times [2024-11-24 01:45:32,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:45:32,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729446345] [2024-11-24 01:45:32,384 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:45:32,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:45:32,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:45:32,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:45:32,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:45:32,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729446345] [2024-11-24 01:45:32,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729446345] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:45:32,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:45:32,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-24 01:45:32,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273969305] [2024-11-24 01:45:32,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:45:32,772 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-24 01:45:32,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:45:32,772 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-24 01:45:32,772 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-24 01:45:32,933 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 79 [2024-11-24 01:45:32,934 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) [2024-11-24 01:45:32,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:45:32,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 79 [2024-11-24 01:45:32,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:45:33,886 INFO L124 PetriNetUnfolderBase]: 4706/6957 cut-off events. [2024-11-24 01:45:33,887 INFO L125 PetriNetUnfolderBase]: For 78/78 co-relation queries the response was YES. [2024-11-24 01:45:33,897 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. [2024-11-24 01:45:33,927 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 47 selfloop transitions, 7 changer transitions 0/73 dead transitions. [2024-11-24 01:45:33,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 73 transitions, 274 flow [2024-11-24 01:45:33,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 01:45:33,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-24 01:45:33,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 180 transitions. [2024-11-24 01:45:33,929 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45569620253164556 [2024-11-24 01:45:33,930 INFO L175 Difference]: Start difference. First operand has 66 places, 67 transitions, 148 flow. Second operand 5 states and 180 transitions. [2024-11-24 01:45:33,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 73 transitions, 274 flow [2024-11-24 01:45:33,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 73 transitions, 260 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-24 01:45:33,935 INFO L231 Difference]: Finished difference. Result has 70 places, 73 transitions, 193 flow [2024-11-24 01:45:33,935 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} [2024-11-24 01:45:33,936 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, -4 predicate places. [2024-11-24 01:45:33,937 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 73 transitions, 193 flow [2024-11-24 01:45:33,937 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) [2024-11-24 01:45:33,937 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:45:33,937 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-24 01:45:33,937 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-24 01:45:33,937 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-24 01:45:33,938 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:45:33,938 INFO L85 PathProgramCache]: Analyzing trace with hash 232405179, now seen corresponding path program 1 times [2024-11-24 01:45:33,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:45:33,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752202919] [2024-11-24 01:45:33,938 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:45:33,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:45:33,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:45:34,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:45:34,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:45:34,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752202919] [2024-11-24 01:45:34,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752202919] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:45:34,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283324956] [2024-11-24 01:45:34,410 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:45:34,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:45:34,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c624a3da-73fd-4127-b6a5-ffbe0f87f375/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:45:34,415 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c624a3da-73fd-4127-b6a5-ffbe0f87f375/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:45:34,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c624a3da-73fd-4127-b6a5-ffbe0f87f375/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-24 01:45:34,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:45:34,559 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-24 01:45:34,564 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:45:34,672 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 [2024-11-24 01:45:34,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:45:34,929 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:45:35,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:45:35,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283324956] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:45:35,230 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:45:35,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-24 01:45:35,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341178245] [2024-11-24 01:45:35,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:45:35,230 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-24 01:45:35,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:45:35,233 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-24 01:45:35,233 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-11-24 01:45:35,876 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 79 [2024-11-24 01:45:35,877 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) [2024-11-24 01:45:35,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:45:35,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 79 [2024-11-24 01:45:35,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:45:37,362 INFO L124 PetriNetUnfolderBase]: 4706/6956 cut-off events. [2024-11-24 01:45:37,362 INFO L125 PetriNetUnfolderBase]: For 79/79 co-relation queries the response was YES. [2024-11-24 01:45:37,377 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. [2024-11-24 01:45:37,413 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 41 selfloop transitions, 12 changer transitions 0/72 dead transitions. [2024-11-24 01:45:37,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 72 transitions, 295 flow [2024-11-24 01:45:37,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-24 01:45:37,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-24 01:45:37,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 229 transitions. [2024-11-24 01:45:37,416 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4141048824593128 [2024-11-24 01:45:37,416 INFO L175 Difference]: Start difference. First operand has 70 places, 73 transitions, 193 flow. Second operand 7 states and 229 transitions. [2024-11-24 01:45:37,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 72 transitions, 295 flow [2024-11-24 01:45:37,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 72 transitions, 294 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-24 01:45:37,420 INFO L231 Difference]: Finished difference. Result has 74 places, 72 transitions, 212 flow [2024-11-24 01:45:37,420 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} [2024-11-24 01:45:37,421 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 0 predicate places. [2024-11-24 01:45:37,421 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 72 transitions, 212 flow [2024-11-24 01:45:37,422 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) [2024-11-24 01:45:37,422 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:45:37,422 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:45:37,435 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c624a3da-73fd-4127-b6a5-ffbe0f87f375/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-24 01:45:37,623 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c624a3da-73fd-4127-b6a5-ffbe0f87f375/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:45:37,623 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-24 01:45:37,623 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:45:37,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1382119418, now seen corresponding path program 1 times [2024-11-24 01:45:37,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:45:37,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808693168] [2024-11-24 01:45:37,624 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:45:37,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:45:37,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:45:37,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:45:37,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:45:37,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808693168] [2024-11-24 01:45:37,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808693168] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:45:37,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:45:37,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-24 01:45:37,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029121475] [2024-11-24 01:45:37,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:45:37,747 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 01:45:37,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:45:37,748 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 01:45:37,748 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-24 01:45:37,765 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 79 [2024-11-24 01:45:37,767 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) [2024-11-24 01:45:37,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:45:37,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 79 [2024-11-24 01:45:37,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:45:38,562 INFO L124 PetriNetUnfolderBase]: 4706/6960 cut-off events. [2024-11-24 01:45:38,562 INFO L125 PetriNetUnfolderBase]: For 82/82 co-relation queries the response was YES. [2024-11-24 01:45:38,577 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. [2024-11-24 01:45:38,612 INFO L140 encePairwiseOnDemand]: 75/79 looper letters, 50 selfloop transitions, 2 changer transitions 5/76 dead transitions. [2024-11-24 01:45:38,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 76 transitions, 354 flow [2024-11-24 01:45:38,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 01:45:38,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-24 01:45:38,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 161 transitions. [2024-11-24 01:45:38,615 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.509493670886076 [2024-11-24 01:45:38,615 INFO L175 Difference]: Start difference. First operand has 74 places, 72 transitions, 212 flow. Second operand 4 states and 161 transitions. [2024-11-24 01:45:38,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 76 transitions, 354 flow [2024-11-24 01:45:38,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 76 transitions, 310 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-11-24 01:45:38,618 INFO L231 Difference]: Finished difference. Result has 72 places, 71 transitions, 183 flow [2024-11-24 01:45:38,622 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} [2024-11-24 01:45:38,623 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, -2 predicate places. [2024-11-24 01:45:38,623 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 71 transitions, 183 flow [2024-11-24 01:45:38,623 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) [2024-11-24 01:45:38,624 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:45:38,624 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:45:38,624 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-24 01:45:38,624 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-24 01:45:38,625 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:45:38,627 INFO L85 PathProgramCache]: Analyzing trace with hash 39872770, now seen corresponding path program 1 times [2024-11-24 01:45:38,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:45:38,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270240310] [2024-11-24 01:45:38,627 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:45:38,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:45:38,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:45:38,996 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:45:38,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:45:38,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270240310] [2024-11-24 01:45:38,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270240310] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:45:38,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432106127] [2024-11-24 01:45:38,997 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:45:38,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:45:38,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c624a3da-73fd-4127-b6a5-ffbe0f87f375/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:45:39,001 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c624a3da-73fd-4127-b6a5-ffbe0f87f375/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:45:39,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c624a3da-73fd-4127-b6a5-ffbe0f87f375/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-24 01:45:39,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:45:39,111 INFO L256 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-24 01:45:39,113 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:45:39,141 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 [2024-11-24 01:45:39,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-24 01:45:39,236 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 [2024-11-24 01:45:39,259 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-24 01:45:39,260 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 [2024-11-24 01:45:39,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:45:39,342 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:45:39,565 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 [2024-11-24 01:45:39,689 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:45:39,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432106127] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:45:39,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:45:39,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-24 01:45:39,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298499705] [2024-11-24 01:45:39,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:45:39,691 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-24 01:45:39,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:45:39,691 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-24 01:45:39,692 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-24 01:45:40,693 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 79 [2024-11-24 01:45:40,694 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) [2024-11-24 01:45:40,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:45:40,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 79 [2024-11-24 01:45:40,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:45:42,652 INFO L124 PetriNetUnfolderBase]: 9879/14505 cut-off events. [2024-11-24 01:45:42,652 INFO L125 PetriNetUnfolderBase]: For 79/79 co-relation queries the response was YES. [2024-11-24 01:45:42,672 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. [2024-11-24 01:45:42,738 INFO L140 encePairwiseOnDemand]: 68/79 looper letters, 103 selfloop transitions, 11 changer transitions 0/130 dead transitions. [2024-11-24 01:45:42,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 130 transitions, 533 flow [2024-11-24 01:45:42,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-24 01:45:42,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-24 01:45:42,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 315 transitions. [2024-11-24 01:45:42,741 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4430379746835443 [2024-11-24 01:45:42,741 INFO L175 Difference]: Start difference. First operand has 72 places, 71 transitions, 183 flow. Second operand 9 states and 315 transitions. [2024-11-24 01:45:42,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 130 transitions, 533 flow [2024-11-24 01:45:42,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 130 transitions, 523 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-24 01:45:42,749 INFO L231 Difference]: Finished difference. Result has 77 places, 73 transitions, 215 flow [2024-11-24 01:45:42,749 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} [2024-11-24 01:45:42,750 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 3 predicate places. [2024-11-24 01:45:42,750 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 73 transitions, 215 flow [2024-11-24 01:45:42,751 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) [2024-11-24 01:45:42,751 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:45:42,751 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:45:42,762 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c624a3da-73fd-4127-b6a5-ffbe0f87f375/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-24 01:45:42,951 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c624a3da-73fd-4127-b6a5-ffbe0f87f375/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:45:42,951 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-24 01:45:42,952 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:45:42,952 INFO L85 PathProgramCache]: Analyzing trace with hash 39872769, now seen corresponding path program 1 times [2024-11-24 01:45:42,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:45:42,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274600905] [2024-11-24 01:45:42,953 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:45:42,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:45:42,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:45:43,102 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-24 01:45:43,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:45:43,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274600905] [2024-11-24 01:45:43,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274600905] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:45:43,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:45:43,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-24 01:45:43,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165923758] [2024-11-24 01:45:43,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:45:43,104 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 01:45:43,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:45:43,105 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 01:45:43,105 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-24 01:45:43,175 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 79 [2024-11-24 01:45:43,175 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) [2024-11-24 01:45:43,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:45:43,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 79 [2024-11-24 01:45:43,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:45:44,690 INFO L124 PetriNetUnfolderBase]: 11413/15792 cut-off events. [2024-11-24 01:45:44,690 INFO L125 PetriNetUnfolderBase]: For 3298/3462 co-relation queries the response was YES. [2024-11-24 01:45:44,714 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. [2024-11-24 01:45:44,780 INFO L140 encePairwiseOnDemand]: 70/79 looper letters, 54 selfloop transitions, 4 changer transitions 0/67 dead transitions. [2024-11-24 01:45:44,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 67 transitions, 319 flow [2024-11-24 01:45:44,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 01:45:44,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-24 01:45:44,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 136 transitions. [2024-11-24 01:45:44,782 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34430379746835443 [2024-11-24 01:45:44,782 INFO L175 Difference]: Start difference. First operand has 77 places, 73 transitions, 215 flow. Second operand 5 states and 136 transitions. [2024-11-24 01:45:44,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 67 transitions, 319 flow [2024-11-24 01:45:44,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 67 transitions, 316 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-24 01:45:44,794 INFO L231 Difference]: Finished difference. Result has 73 places, 67 transitions, 208 flow [2024-11-24 01:45:44,797 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} [2024-11-24 01:45:44,798 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, -1 predicate places. [2024-11-24 01:45:44,798 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 67 transitions, 208 flow [2024-11-24 01:45:44,798 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) [2024-11-24 01:45:44,798 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:45:44,799 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:45:44,799 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-24 01:45:44,799 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-24 01:45:44,799 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:45:44,800 INFO L85 PathProgramCache]: Analyzing trace with hash -360228640, now seen corresponding path program 1 times [2024-11-24 01:45:44,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:45:44,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508246975] [2024-11-24 01:45:44,804 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:45:44,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:45:44,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:45:45,021 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:45:45,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:45:45,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508246975] [2024-11-24 01:45:45,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508246975] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:45:45,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209117342] [2024-11-24 01:45:45,022 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:45:45,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:45:45,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c624a3da-73fd-4127-b6a5-ffbe0f87f375/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:45:45,025 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c624a3da-73fd-4127-b6a5-ffbe0f87f375/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:45:45,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c624a3da-73fd-4127-b6a5-ffbe0f87f375/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-24 01:45:45,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:45:45,138 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-24 01:45:45,140 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:45:45,236 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:45:45,236 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:45:45,338 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:45:45,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209117342] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:45:45,338 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:45:45,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-24 01:45:45,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952786206] [2024-11-24 01:45:45,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:45:45,339 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-24 01:45:45,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:45:45,340 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-24 01:45:45,341 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-11-24 01:45:45,535 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 79 [2024-11-24 01:45:45,536 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) [2024-11-24 01:45:45,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:45:45,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 79 [2024-11-24 01:45:45,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:45:47,961 INFO L124 PetriNetUnfolderBase]: 11738/16939 cut-off events. [2024-11-24 01:45:47,961 INFO L125 PetriNetUnfolderBase]: For 3744/3792 co-relation queries the response was YES. [2024-11-24 01:45:47,983 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. [2024-11-24 01:45:48,025 INFO L140 encePairwiseOnDemand]: 69/79 looper letters, 113 selfloop transitions, 14 changer transitions 0/138 dead transitions. [2024-11-24 01:45:48,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 138 transitions, 690 flow [2024-11-24 01:45:48,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-24 01:45:48,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-24 01:45:48,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 321 transitions. [2024-11-24 01:45:48,027 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5079113924050633 [2024-11-24 01:45:48,027 INFO L175 Difference]: Start difference. First operand has 73 places, 67 transitions, 208 flow. Second operand 8 states and 321 transitions. [2024-11-24 01:45:48,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 138 transitions, 690 flow [2024-11-24 01:45:48,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 138 transitions, 680 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-24 01:45:48,033 INFO L231 Difference]: Finished difference. Result has 83 places, 78 transitions, 330 flow [2024-11-24 01:45:48,033 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} [2024-11-24 01:45:48,034 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 9 predicate places. [2024-11-24 01:45:48,035 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 78 transitions, 330 flow [2024-11-24 01:45:48,035 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) [2024-11-24 01:45:48,035 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:45:48,035 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:45:48,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c624a3da-73fd-4127-b6a5-ffbe0f87f375/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-24 01:45:48,236 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c624a3da-73fd-4127-b6a5-ffbe0f87f375/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:45:48,236 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-24 01:45:48,237 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:45:48,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1855327294, now seen corresponding path program 1 times [2024-11-24 01:45:48,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:45:48,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798342860] [2024-11-24 01:45:48,237 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:45:48,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:45:48,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:45:48,361 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-24 01:45:48,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:45:48,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798342860] [2024-11-24 01:45:48,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798342860] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:45:48,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:45:48,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-24 01:45:48,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969992791] [2024-11-24 01:45:48,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:45:48,362 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 01:45:48,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:45:48,363 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 01:45:48,364 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-24 01:45:48,410 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 79 [2024-11-24 01:45:48,411 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) [2024-11-24 01:45:48,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:45:48,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 79 [2024-11-24 01:45:48,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:45:49,920 INFO L124 PetriNetUnfolderBase]: 7958/11708 cut-off events. [2024-11-24 01:45:49,921 INFO L125 PetriNetUnfolderBase]: For 4783/5025 co-relation queries the response was YES. [2024-11-24 01:45:49,945 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. [2024-11-24 01:45:49,979 INFO L140 encePairwiseOnDemand]: 74/79 looper letters, 58 selfloop transitions, 5 changer transitions 0/75 dead transitions. [2024-11-24 01:45:49,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 75 transitions, 450 flow [2024-11-24 01:45:49,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 01:45:49,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-24 01:45:49,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 147 transitions. [2024-11-24 01:45:49,980 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4651898734177215 [2024-11-24 01:45:49,980 INFO L175 Difference]: Start difference. First operand has 83 places, 78 transitions, 330 flow. Second operand 4 states and 147 transitions. [2024-11-24 01:45:49,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 75 transitions, 450 flow [2024-11-24 01:45:49,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 75 transitions, 448 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-24 01:45:49,987 INFO L231 Difference]: Finished difference. Result has 82 places, 75 transitions, 332 flow [2024-11-24 01:45:49,988 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} [2024-11-24 01:45:49,989 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 8 predicate places. [2024-11-24 01:45:49,989 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 75 transitions, 332 flow [2024-11-24 01:45:49,989 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) [2024-11-24 01:45:49,989 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:45:49,990 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:45:49,990 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-24 01:45:49,990 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-24 01:45:49,990 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:45:49,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1855327293, now seen corresponding path program 1 times [2024-11-24 01:45:49,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:45:49,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273462510] [2024-11-24 01:45:49,991 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:45:49,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:45:50,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:45:50,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-24 01:45:50,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:45:50,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273462510] [2024-11-24 01:45:50,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273462510] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:45:50,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:45:50,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-24 01:45:50,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122565640] [2024-11-24 01:45:50,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:45:50,197 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-24 01:45:50,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:45:50,197 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-24 01:45:50,197 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-24 01:45:50,328 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 79 [2024-11-24 01:45:50,328 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) [2024-11-24 01:45:50,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:45:50,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 79 [2024-11-24 01:45:50,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:45:52,591 INFO L124 PetriNetUnfolderBase]: 14485/21019 cut-off events. [2024-11-24 01:45:52,591 INFO L125 PetriNetUnfolderBase]: For 8797/9454 co-relation queries the response was YES. [2024-11-24 01:45:52,631 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. [2024-11-24 01:45:52,897 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 141 selfloop transitions, 12 changer transitions 0/164 dead transitions. [2024-11-24 01:45:52,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 164 transitions, 884 flow [2024-11-24 01:45:52,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-24 01:45:52,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-24 01:45:52,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 285 transitions. [2024-11-24 01:45:52,899 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6012658227848101 [2024-11-24 01:45:52,899 INFO L175 Difference]: Start difference. First operand has 82 places, 75 transitions, 332 flow. Second operand 6 states and 285 transitions. [2024-11-24 01:45:52,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 164 transitions, 884 flow [2024-11-24 01:45:52,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 164 transitions, 878 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-24 01:45:52,908 INFO L231 Difference]: Finished difference. Result has 88 places, 81 transitions, 402 flow [2024-11-24 01:45:52,908 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} [2024-11-24 01:45:52,909 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 14 predicate places. [2024-11-24 01:45:52,909 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 81 transitions, 402 flow [2024-11-24 01:45:52,909 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) [2024-11-24 01:45:52,910 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:45:52,910 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:45:52,910 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-24 01:45:52,910 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-24 01:45:52,911 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:45:52,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1496865756, now seen corresponding path program 2 times [2024-11-24 01:45:52,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:45:52,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546699645] [2024-11-24 01:45:52,911 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:45:52,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:45:52,940 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:45:52,942 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:45:53,387 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-24 01:45:53,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:45:53,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546699645] [2024-11-24 01:45:53,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546699645] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:45:53,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694825391] [2024-11-24 01:45:53,388 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:45:53,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:45:53,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c624a3da-73fd-4127-b6a5-ffbe0f87f375/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:45:53,391 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c624a3da-73fd-4127-b6a5-ffbe0f87f375/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:45:53,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c624a3da-73fd-4127-b6a5-ffbe0f87f375/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-24 01:45:53,499 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:45:53,499 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:45:53,501 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-24 01:45:53,503 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:45:53,511 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 [2024-11-24 01:45:53,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-24 01:45:53,631 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 [2024-11-24 01:45:53,641 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-24 01:45:53,641 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 [2024-11-24 01:45:53,737 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-24 01:45:53,737 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:45:53,943 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 [2024-11-24 01:45:54,162 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-24 01:45:54,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694825391] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:45:54,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:45:54,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 17 [2024-11-24 01:45:54,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772502648] [2024-11-24 01:45:54,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:45:54,163 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-24 01:45:54,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:45:54,164 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-24 01:45:54,164 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2024-11-24 01:45:56,042 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 79 [2024-11-24 01:45:56,042 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) [2024-11-24 01:45:56,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:45:56,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 79 [2024-11-24 01:45:56,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:46:02,877 INFO L124 PetriNetUnfolderBase]: 36439/50033 cut-off events. [2024-11-24 01:46:02,878 INFO L125 PetriNetUnfolderBase]: For 40462/41238 co-relation queries the response was YES. [2024-11-24 01:46:02,982 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. [2024-11-24 01:46:03,114 INFO L140 encePairwiseOnDemand]: 68/79 looper letters, 208 selfloop transitions, 23 changer transitions 0/237 dead transitions. [2024-11-24 01:46:03,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 237 transitions, 1524 flow [2024-11-24 01:46:03,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-24 01:46:03,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-24 01:46:03,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 494 transitions. [2024-11-24 01:46:03,117 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39082278481012656 [2024-11-24 01:46:03,117 INFO L175 Difference]: Start difference. First operand has 88 places, 81 transitions, 402 flow. Second operand 16 states and 494 transitions. [2024-11-24 01:46:03,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 237 transitions, 1524 flow [2024-11-24 01:46:03,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 237 transitions, 1514 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-24 01:46:03,150 INFO L231 Difference]: Finished difference. Result has 105 places, 88 transitions, 519 flow [2024-11-24 01:46:03,150 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} [2024-11-24 01:46:03,151 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 31 predicate places. [2024-11-24 01:46:03,151 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 88 transitions, 519 flow [2024-11-24 01:46:03,151 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) [2024-11-24 01:46:03,151 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:46:03,152 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:46:03,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c624a3da-73fd-4127-b6a5-ffbe0f87f375/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-24 01:46:03,352 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c624a3da-73fd-4127-b6a5-ffbe0f87f375/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:46:03,352 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-24 01:46:03,352 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:46:03,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1628719058, now seen corresponding path program 1 times [2024-11-24 01:46:03,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:46:03,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392235464] [2024-11-24 01:46:03,353 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:46:03,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:46:03,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:46:03,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:46:03,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:46:03,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392235464] [2024-11-24 01:46:03,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392235464] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:46:03,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:46:03,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-24 01:46:03,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130936909] [2024-11-24 01:46:03,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:46:03,734 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-24 01:46:03,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:46:03,735 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-24 01:46:03,735 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-24 01:46:04,005 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 79 [2024-11-24 01:46:04,005 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) [2024-11-24 01:46:04,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:46:04,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 79 [2024-11-24 01:46:04,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:46:08,519 INFO L124 PetriNetUnfolderBase]: 29355/41979 cut-off events. [2024-11-24 01:46:08,519 INFO L125 PetriNetUnfolderBase]: For 54380/57065 co-relation queries the response was YES. [2024-11-24 01:46:08,627 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. [2024-11-24 01:46:08,748 INFO L140 encePairwiseOnDemand]: 70/79 looper letters, 102 selfloop transitions, 13 changer transitions 0/124 dead transitions. [2024-11-24 01:46:08,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 124 transitions, 937 flow [2024-11-24 01:46:08,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-24 01:46:08,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-24 01:46:08,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 203 transitions. [2024-11-24 01:46:08,750 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4282700421940928 [2024-11-24 01:46:08,750 INFO L175 Difference]: Start difference. First operand has 105 places, 88 transitions, 519 flow. Second operand 6 states and 203 transitions. [2024-11-24 01:46:08,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 124 transitions, 937 flow [2024-11-24 01:46:08,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 124 transitions, 871 flow, removed 8 selfloop flow, removed 12 redundant places. [2024-11-24 01:46:08,792 INFO L231 Difference]: Finished difference. Result has 99 places, 89 transitions, 509 flow [2024-11-24 01:46:08,792 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} [2024-11-24 01:46:08,793 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 25 predicate places. [2024-11-24 01:46:08,793 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 89 transitions, 509 flow [2024-11-24 01:46:08,794 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) [2024-11-24 01:46:08,794 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:46:08,794 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:46:08,794 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-24 01:46:08,794 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-24 01:46:08,795 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:46:08,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1593965583, now seen corresponding path program 1 times [2024-11-24 01:46:08,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:46:08,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728787970] [2024-11-24 01:46:08,795 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:46:08,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:46:08,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:46:09,057 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-24 01:46:09,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:46:09,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728787970] [2024-11-24 01:46:09,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728787970] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:46:09,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20827529] [2024-11-24 01:46:09,058 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:46:09,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:46:09,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c624a3da-73fd-4127-b6a5-ffbe0f87f375/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:46:09,060 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c624a3da-73fd-4127-b6a5-ffbe0f87f375/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:46:09,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c624a3da-73fd-4127-b6a5-ffbe0f87f375/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-24 01:46:09,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:46:09,174 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-24 01:46:09,175 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:46:09,270 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 [2024-11-24 01:46:09,293 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-24 01:46:09,293 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:46:09,343 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 [2024-11-24 01:46:09,433 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-24 01:46:09,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20827529] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:46:09,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:46:09,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2024-11-24 01:46:09,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99155730] [2024-11-24 01:46:09,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:46:09,435 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-24 01:46:09,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:46:09,436 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-24 01:46:09,437 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-11-24 01:46:10,061 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 79 [2024-11-24 01:46:10,062 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) [2024-11-24 01:46:10,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:46:10,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 79 [2024-11-24 01:46:10,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:46:18,617 INFO L124 PetriNetUnfolderBase]: 50612/71462 cut-off events. [2024-11-24 01:46:18,617 INFO L125 PetriNetUnfolderBase]: For 80883/85912 co-relation queries the response was YES. [2024-11-24 01:46:19,102 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. [2024-11-24 01:46:19,309 INFO L140 encePairwiseOnDemand]: 65/79 looper letters, 288 selfloop transitions, 40 changer transitions 0/337 dead transitions. [2024-11-24 01:46:19,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 337 transitions, 2174 flow [2024-11-24 01:46:19,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-24 01:46:19,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-24 01:46:19,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 660 transitions. [2024-11-24 01:46:19,312 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5221518987341772 [2024-11-24 01:46:19,312 INFO L175 Difference]: Start difference. First operand has 99 places, 89 transitions, 509 flow. Second operand 16 states and 660 transitions. [2024-11-24 01:46:19,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 337 transitions, 2174 flow [2024-11-24 01:46:19,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 337 transitions, 2162 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-24 01:46:19,566 INFO L231 Difference]: Finished difference. Result has 115 places, 100 transitions, 690 flow [2024-11-24 01:46:19,567 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} [2024-11-24 01:46:19,568 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 41 predicate places. [2024-11-24 01:46:19,568 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 100 transitions, 690 flow [2024-11-24 01:46:19,568 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) [2024-11-24 01:46:19,568 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:46:19,568 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:46:19,575 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c624a3da-73fd-4127-b6a5-ffbe0f87f375/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-24 01:46:19,768 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c624a3da-73fd-4127-b6a5-ffbe0f87f375/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:46:19,769 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-24 01:46:19,769 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:46:19,769 INFO L85 PathProgramCache]: Analyzing trace with hash -558046207, now seen corresponding path program 1 times [2024-11-24 01:46:19,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:46:19,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288599015] [2024-11-24 01:46:19,769 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:46:19,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:46:19,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:46:19,912 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:46:19,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:46:19,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288599015] [2024-11-24 01:46:19,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288599015] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:46:19,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272446734] [2024-11-24 01:46:19,913 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:46:19,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:46:19,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c624a3da-73fd-4127-b6a5-ffbe0f87f375/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:46:19,916 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c624a3da-73fd-4127-b6a5-ffbe0f87f375/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:46:19,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c624a3da-73fd-4127-b6a5-ffbe0f87f375/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-24 01:46:20,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:46:20,016 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-24 01:46:20,017 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:46:20,129 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:46:20,129 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:46:20,217 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:46:20,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272446734] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:46:20,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:46:20,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-24 01:46:20,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746730010] [2024-11-24 01:46:20,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:46:20,218 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-24 01:46:20,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:46:20,219 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-24 01:46:20,219 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-24 01:46:20,341 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 79 [2024-11-24 01:46:20,342 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) [2024-11-24 01:46:20,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:46:20,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 79 [2024-11-24 01:46:20,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:46:28,159 INFO L124 PetriNetUnfolderBase]: 46010/68297 cut-off events. [2024-11-24 01:46:28,159 INFO L125 PetriNetUnfolderBase]: For 106434/109699 co-relation queries the response was YES. [2024-11-24 01:46:28,367 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. [2024-11-24 01:46:28,574 INFO L140 encePairwiseOnDemand]: 69/79 looper letters, 146 selfloop transitions, 19 changer transitions 0/176 dead transitions. [2024-11-24 01:46:28,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 176 transitions, 1349 flow [2024-11-24 01:46:28,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-24 01:46:28,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-24 01:46:28,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 326 transitions. [2024-11-24 01:46:28,576 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5158227848101266 [2024-11-24 01:46:28,576 INFO L175 Difference]: Start difference. First operand has 115 places, 100 transitions, 690 flow. Second operand 8 states and 326 transitions. [2024-11-24 01:46:28,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 176 transitions, 1349 flow [2024-11-24 01:46:28,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 176 transitions, 1272 flow, removed 14 selfloop flow, removed 10 redundant places. [2024-11-24 01:46:28,829 INFO L231 Difference]: Finished difference. Result has 115 places, 107 transitions, 753 flow [2024-11-24 01:46:28,829 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} [2024-11-24 01:46:28,830 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 41 predicate places. [2024-11-24 01:46:28,830 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 107 transitions, 753 flow [2024-11-24 01:46:28,830 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) [2024-11-24 01:46:28,830 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:46:28,831 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:46:28,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c624a3da-73fd-4127-b6a5-ffbe0f87f375/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-24 01:46:29,031 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c624a3da-73fd-4127-b6a5-ffbe0f87f375/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:46:29,031 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread3Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-24 01:46:29,032 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:46:29,032 INFO L85 PathProgramCache]: Analyzing trace with hash 924870357, now seen corresponding path program 1 times [2024-11-24 01:46:29,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:46:29,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211052894] [2024-11-24 01:46:29,032 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:46:29,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:46:29,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:46:29,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-24 01:46:29,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:46:29,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211052894] [2024-11-24 01:46:29,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211052894] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:46:29,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:46:29,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-24 01:46:29,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747849143] [2024-11-24 01:46:29,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:46:29,173 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-24 01:46:29,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:46:29,173 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-24 01:46:29,173 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-24 01:46:29,288 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 79 [2024-11-24 01:46:29,289 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) [2024-11-24 01:46:29,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:46:29,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 79 [2024-11-24 01:46:29,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:46:37,074 INFO L124 PetriNetUnfolderBase]: 41414/60746 cut-off events. [2024-11-24 01:46:37,074 INFO L125 PetriNetUnfolderBase]: For 106545/111170 co-relation queries the response was YES. [2024-11-24 01:46:37,274 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. [2024-11-24 01:46:37,525 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 184 selfloop transitions, 11 changer transitions 0/206 dead transitions. [2024-11-24 01:46:37,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 206 transitions, 1687 flow [2024-11-24 01:46:37,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-24 01:46:37,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-24 01:46:37,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 269 transitions. [2024-11-24 01:46:37,528 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5675105485232067 [2024-11-24 01:46:37,528 INFO L175 Difference]: Start difference. First operand has 115 places, 107 transitions, 753 flow. Second operand 6 states and 269 transitions. [2024-11-24 01:46:37,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 206 transitions, 1687 flow [2024-11-24 01:46:37,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 206 transitions, 1656 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-11-24 01:46:37,777 INFO L231 Difference]: Finished difference. Result has 119 places, 112 transitions, 794 flow [2024-11-24 01:46:37,777 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} [2024-11-24 01:46:37,778 INFO L279 CegarLoopForPetriNet]: 74 programPoint places, 45 predicate places. [2024-11-24 01:46:37,778 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 112 transitions, 794 flow [2024-11-24 01:46:37,778 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) [2024-11-24 01:46:37,778 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:46:37,778 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:46:37,778 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-24 01:46:37,778 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-11-24 01:46:37,779 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:46:37,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1516757862, now seen corresponding path program 1 times [2024-11-24 01:46:37,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:46:37,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411855753] [2024-11-24 01:46:37,779 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:46:37,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:46:37,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:46:37,955 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-24 01:46:37,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:46:37,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411855753] [2024-11-24 01:46:37,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411855753] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:46:37,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:46:37,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-24 01:46:37,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805692696] [2024-11-24 01:46:37,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:46:37,956 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-24 01:46:37,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:46:37,957 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-24 01:46:37,957 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-24 01:46:38,087 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 79 [2024-11-24 01:46:38,088 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) [2024-11-24 01:46:38,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:46:38,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 79 [2024-11-24 01:46:38,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand