./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db77a1ef-0527-45f6-bdc7-6858fbf73033/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db77a1ef-0527-45f6-bdc7-6858fbf73033/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db77a1ef-0527-45f6-bdc7-6858fbf73033/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db77a1ef-0527-45f6-bdc7-6858fbf73033/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db77a1ef-0527-45f6-bdc7-6858fbf73033/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db77a1ef-0527-45f6-bdc7-6858fbf73033/bin/uautomizer-verify-BQ2R08f2Ya --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 b4399e58ed3ca9c75e2a61372e91a4308548a0e79a3eb4428d85990bd71242f7 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 00:09:45,767 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 00:09:45,837 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db77a1ef-0527-45f6-bdc7-6858fbf73033/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-29 00:09:45,842 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 00:09:45,842 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 00:09:45,869 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 00:09:45,869 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 00:09:45,870 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 00:09:45,871 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 00:09:45,871 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 00:09:45,872 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 00:09:45,872 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 00:09:45,873 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 00:09:45,874 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 00:09:45,874 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 00:09:45,875 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 00:09:45,875 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 00:09:45,876 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 00:09:45,876 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 00:09:45,877 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 00:09:45,877 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 00:09:45,878 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 00:09:45,878 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 00:09:45,879 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 00:09:45,879 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 00:09:45,880 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 00:09:45,880 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 00:09:45,881 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 00:09:45,881 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 00:09:45,882 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 00:09:45,882 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 00:09:45,882 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 00:09:45,883 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:09:45,883 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 00:09:45,883 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 00:09:45,883 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 00:09:45,884 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 00:09:45,884 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 00:09:45,884 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 00:09:45,884 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 00:09:45,884 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 00:09:45,885 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db77a1ef-0527-45f6-bdc7-6858fbf73033/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db77a1ef-0527-45f6-bdc7-6858fbf73033/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b4399e58ed3ca9c75e2a61372e91a4308548a0e79a3eb4428d85990bd71242f7 [2023-11-29 00:09:46,105 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 00:09:46,136 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 00:09:46,138 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 00:09:46,139 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 00:09:46,140 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 00:09:46,141 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db77a1ef-0527-45f6-bdc7-6858fbf73033/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i [2023-11-29 00:09:48,849 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 00:09:49,097 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 00:09:49,098 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db77a1ef-0527-45f6-bdc7-6858fbf73033/sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i [2023-11-29 00:09:49,112 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db77a1ef-0527-45f6-bdc7-6858fbf73033/bin/uautomizer-verify-BQ2R08f2Ya/data/bf8683358/4ace5bef10e149fbbcbfd6480d269192/FLAGab6020723 [2023-11-29 00:09:49,123 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db77a1ef-0527-45f6-bdc7-6858fbf73033/bin/uautomizer-verify-BQ2R08f2Ya/data/bf8683358/4ace5bef10e149fbbcbfd6480d269192 [2023-11-29 00:09:49,125 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 00:09:49,127 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 00:09:49,128 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 00:09:49,128 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 00:09:49,133 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 00:09:49,134 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:09:49" (1/1) ... [2023-11-29 00:09:49,135 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68b8cdfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:09:49, skipping insertion in model container [2023-11-29 00:09:49,135 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:09:49" (1/1) ... [2023-11-29 00:09:49,192 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:09:49,482 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:09:49,493 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 00:09:49,534 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:09:49,569 INFO L206 MainTranslator]: Completed translation [2023-11-29 00:09:49,569 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:09:49 WrapperNode [2023-11-29 00:09:49,569 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 00:09:49,570 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 00:09:49,570 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 00:09:49,570 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 00:09:49,576 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:09:49" (1/1) ... [2023-11-29 00:09:49,590 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:09:49" (1/1) ... [2023-11-29 00:09:49,614 INFO L138 Inliner]: procedures = 171, calls = 44, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 112 [2023-11-29 00:09:49,615 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 00:09:49,616 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 00:09:49,616 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 00:09:49,616 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 00:09:49,625 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:09:49" (1/1) ... [2023-11-29 00:09:49,625 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:09:49" (1/1) ... [2023-11-29 00:09:49,628 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:09:49" (1/1) ... [2023-11-29 00:09:49,644 INFO L175 MemorySlicer]: Split 14 memory accesses to 4 slices as follows [2, 5, 5, 2]. 36 percent of accesses are in the largest equivalence class. The 12 initializations are split as follows [2, 5, 5, 0]. The 1 writes are split as follows [0, 0, 0, 1]. [2023-11-29 00:09:49,644 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:09:49" (1/1) ... [2023-11-29 00:09:49,644 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:09:49" (1/1) ... [2023-11-29 00:09:49,652 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:09:49" (1/1) ... [2023-11-29 00:09:49,657 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:09:49" (1/1) ... [2023-11-29 00:09:49,659 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:09:49" (1/1) ... [2023-11-29 00:09:49,661 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:09:49" (1/1) ... [2023-11-29 00:09:49,665 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 00:09:49,666 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 00:09:49,667 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 00:09:49,667 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 00:09:49,668 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:09:49" (1/1) ... [2023-11-29 00:09:49,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:09:49,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db77a1ef-0527-45f6-bdc7-6858fbf73033/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:09:49,694 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db77a1ef-0527-45f6-bdc7-6858fbf73033/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 00:09:49,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db77a1ef-0527-45f6-bdc7-6858fbf73033/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 00:09:49,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 00:09:49,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 00:09:49,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 00:09:49,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-29 00:09:49,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 00:09:49,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 00:09:49,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 00:09:49,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-29 00:09:49,727 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-29 00:09:49,727 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 00:09:49,727 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 00:09:49,727 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-29 00:09:49,728 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-29 00:09:49,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 00:09:49,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 00:09:49,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 00:09:49,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 00:09:49,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 00:09:49,729 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-29 00:09:49,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 00:09:49,729 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 00:09:49,730 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 00:09:49,861 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 00:09:49,863 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 00:09:50,080 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 00:09:50,211 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 00:09:50,211 INFO L309 CfgBuilder]: Removed 16 assume(true) statements. [2023-11-29 00:09:50,212 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:09:50 BoogieIcfgContainer [2023-11-29 00:09:50,212 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 00:09:50,215 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 00:09:50,215 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 00:09:50,218 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 00:09:50,218 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 12:09:49" (1/3) ... [2023-11-29 00:09:50,219 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5df42dd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:09:50, skipping insertion in model container [2023-11-29 00:09:50,219 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:09:49" (2/3) ... [2023-11-29 00:09:50,220 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5df42dd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:09:50, skipping insertion in model container [2023-11-29 00:09:50,220 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:09:50" (3/3) ... [2023-11-29 00:09:50,221 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_61-invariant_racing.i [2023-11-29 00:09:50,240 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 00:09:50,240 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-11-29 00:09:50,240 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 00:09:50,279 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-29 00:09:50,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 74 places, 89 transitions, 185 flow [2023-11-29 00:09:50,382 INFO L124 PetriNetUnfolderBase]: 28/138 cut-off events. [2023-11-29 00:09:50,382 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-29 00:09:50,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 138 events. 28/138 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 527 event pairs, 0 based on Foata normal form. 0/95 useless extension candidates. Maximal degree in co-relation 84. Up to 6 conditions per place. [2023-11-29 00:09:50,388 INFO L82 GeneralOperation]: Start removeDead. Operand has 74 places, 89 transitions, 185 flow [2023-11-29 00:09:50,408 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 89 transitions, 185 flow [2023-11-29 00:09:50,425 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:09:50,432 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@bbf3bae, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:09:50,433 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-29 00:09:50,437 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 00:09:50,437 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-29 00:09:50,437 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 00:09:50,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:09:50,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 00:09:50,438 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-29 00:09:50,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:09:50,444 INFO L85 PathProgramCache]: Analyzing trace with hash 437353, now seen corresponding path program 1 times [2023-11-29 00:09:50,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:09:50,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618969134] [2023-11-29 00:09:50,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:09:50,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:09:50,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:09:50,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:09:50,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:09:50,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618969134] [2023-11-29 00:09:50,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618969134] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:09:50,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:09:50,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 00:09:50,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017496925] [2023-11-29 00:09:50,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:09:50,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:09:50,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:09:50,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:09:50,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:09:50,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 89 [2023-11-29 00:09:50,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 89 transitions, 185 flow. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:09:50,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:09:50,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 89 [2023-11-29 00:09:50,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:09:51,007 INFO L124 PetriNetUnfolderBase]: 296/914 cut-off events. [2023-11-29 00:09:51,007 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-29 00:09:51,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1545 conditions, 914 events. 296/914 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 5614 event pairs, 247 based on Foata normal form. 188/1064 useless extension candidates. Maximal degree in co-relation 1466. Up to 567 conditions per place. [2023-11-29 00:09:51,018 INFO L140 encePairwiseOnDemand]: 69/89 looper letters, 48 selfloop transitions, 2 changer transitions 1/83 dead transitions. [2023-11-29 00:09:51,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 83 transitions, 275 flow [2023-11-29 00:09:51,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:09:51,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:09:51,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 171 transitions. [2023-11-29 00:09:51,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6404494382022472 [2023-11-29 00:09:51,032 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 171 transitions. [2023-11-29 00:09:51,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 171 transitions. [2023-11-29 00:09:51,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:09:51,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 171 transitions. [2023-11-29 00:09:51,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 57.0) internal successors, (171), 3 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) [2023-11-29 00:09:51,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:09:51,044 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:09:51,046 INFO L175 Difference]: Start difference. First operand has 74 places, 89 transitions, 185 flow. Second operand 3 states and 171 transitions. [2023-11-29 00:09:51,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 83 transitions, 275 flow [2023-11-29 00:09:51,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 83 transitions, 275 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 00:09:51,054 INFO L231 Difference]: Finished difference. Result has 73 places, 69 transitions, 149 flow [2023-11-29 00:09:51,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=149, PETRI_PLACES=73, PETRI_TRANSITIONS=69} [2023-11-29 00:09:51,060 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -1 predicate places. [2023-11-29 00:09:51,060 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 69 transitions, 149 flow [2023-11-29 00:09:51,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:09:51,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:09:51,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 00:09:51,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 00:09:51,061 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-29 00:09:51,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:09:51,062 INFO L85 PathProgramCache]: Analyzing trace with hash 437354, now seen corresponding path program 1 times [2023-11-29 00:09:51,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:09:51,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706110853] [2023-11-29 00:09:51,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:09:51,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:09:51,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:09:51,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:09:51,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:09:51,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706110853] [2023-11-29 00:09:51,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706110853] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:09:51,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:09:51,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 00:09:51,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891968316] [2023-11-29 00:09:51,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:09:51,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:09:51,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:09:51,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:09:51,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:09:51,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 89 [2023-11-29 00:09:51,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 69 transitions, 149 flow. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:09:51,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:09:51,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 89 [2023-11-29 00:09:51,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:09:51,397 INFO L124 PetriNetUnfolderBase]: 248/804 cut-off events. [2023-11-29 00:09:51,397 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-29 00:09:51,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1359 conditions, 804 events. 248/804 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 4990 event pairs, 0 based on Foata normal form. 1/767 useless extension candidates. Maximal degree in co-relation 1319. Up to 517 conditions per place. [2023-11-29 00:09:51,404 INFO L140 encePairwiseOnDemand]: 85/89 looper letters, 48 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2023-11-29 00:09:51,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 83 transitions, 277 flow [2023-11-29 00:09:51,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:09:51,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:09:51,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 157 transitions. [2023-11-29 00:09:51,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5880149812734082 [2023-11-29 00:09:51,406 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 157 transitions. [2023-11-29 00:09:51,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 157 transitions. [2023-11-29 00:09:51,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:09:51,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 157 transitions. [2023-11-29 00:09:51,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:09:51,410 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:09:51,410 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:09:51,410 INFO L175 Difference]: Start difference. First operand has 73 places, 69 transitions, 149 flow. Second operand 3 states and 157 transitions. [2023-11-29 00:09:51,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 83 transitions, 277 flow [2023-11-29 00:09:51,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 83 transitions, 273 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 00:09:51,414 INFO L231 Difference]: Finished difference. Result has 73 places, 69 transitions, 155 flow [2023-11-29 00:09:51,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=155, PETRI_PLACES=73, PETRI_TRANSITIONS=69} [2023-11-29 00:09:51,415 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -1 predicate places. [2023-11-29 00:09:51,415 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 69 transitions, 155 flow [2023-11-29 00:09:51,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:09:51,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:09:51,416 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-11-29 00:09:51,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 00:09:51,416 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-29 00:09:51,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:09:51,417 INFO L85 PathProgramCache]: Analyzing trace with hash 192017350, now seen corresponding path program 1 times [2023-11-29 00:09:51,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:09:51,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799417949] [2023-11-29 00:09:51,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:09:51,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:09:51,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:09:51,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:09:51,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:09:51,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799417949] [2023-11-29 00:09:51,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799417949] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:09:51,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591471602] [2023-11-29 00:09:51,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:09:51,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:09:51,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db77a1ef-0527-45f6-bdc7-6858fbf73033/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:09:51,563 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db77a1ef-0527-45f6-bdc7-6858fbf73033/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:09:51,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db77a1ef-0527-45f6-bdc7-6858fbf73033/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 00:09:51,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:09:51,661 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 00:09:51,666 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:09:51,725 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 [2023-11-29 00:09:51,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:09:51,797 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:09:51,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:09:51,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591471602] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:09:51,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:09:51,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2023-11-29 00:09:51,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233515682] [2023-11-29 00:09:51,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:09:51,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 00:09:51,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:09:51,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 00:09:51,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-29 00:09:51,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2023-11-29 00:09:51,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 69 transitions, 155 flow. Second operand has 9 states, 9 states have (on average 36.333333333333336) internal successors, (327), 9 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:09:51,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:09:51,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2023-11-29 00:09:51,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:09:52,086 INFO L124 PetriNetUnfolderBase]: 43/154 cut-off events. [2023-11-29 00:09:52,086 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2023-11-29 00:09:52,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 288 conditions, 154 events. 43/154 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 450 event pairs, 24 based on Foata normal form. 28/178 useless extension candidates. Maximal degree in co-relation 270. Up to 81 conditions per place. [2023-11-29 00:09:52,088 INFO L140 encePairwiseOnDemand]: 85/89 looper letters, 31 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2023-11-29 00:09:52,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 49 transitions, 174 flow [2023-11-29 00:09:52,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:09:52,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 00:09:52,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 171 transitions. [2023-11-29 00:09:52,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4803370786516854 [2023-11-29 00:09:52,090 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 171 transitions. [2023-11-29 00:09:52,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 171 transitions. [2023-11-29 00:09:52,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:09:52,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 171 transitions. [2023-11-29 00:09:52,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 42.75) internal successors, (171), 4 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) [2023-11-29 00:09:52,093 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 89.0) internal successors, (445), 5 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:09:52,094 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 89.0) internal successors, (445), 5 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:09:52,094 INFO L175 Difference]: Start difference. First operand has 73 places, 69 transitions, 155 flow. Second operand 4 states and 171 transitions. [2023-11-29 00:09:52,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 49 transitions, 174 flow [2023-11-29 00:09:52,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 49 transitions, 168 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 00:09:52,096 INFO L231 Difference]: Finished difference. Result has 39 places, 34 transitions, 76 flow [2023-11-29 00:09:52,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=76, PETRI_PLACES=39, PETRI_TRANSITIONS=34} [2023-11-29 00:09:52,097 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -35 predicate places. [2023-11-29 00:09:52,097 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 34 transitions, 76 flow [2023-11-29 00:09:52,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 36.333333333333336) internal successors, (327), 9 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:09:52,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:09:52,098 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2023-11-29 00:09:52,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db77a1ef-0527-45f6-bdc7-6858fbf73033/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 00:09:52,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db77a1ef-0527-45f6-bdc7-6858fbf73033/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:09:52,304 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-29 00:09:52,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:09:52,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1657570988, now seen corresponding path program 1 times [2023-11-29 00:09:52,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:09:52,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918799654] [2023-11-29 00:09:52,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:09:52,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:09:52,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 00:09:52,324 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 00:09:52,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 00:09:52,352 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 00:09:52,352 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 00:09:52,353 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-29 00:09:52,355 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-11-29 00:09:52,355 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-11-29 00:09:52,356 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-11-29 00:09:52,356 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-11-29 00:09:52,356 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-11-29 00:09:52,356 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-11-29 00:09:52,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 00:09:52,357 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-29 00:09:52,359 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 00:09:52,359 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-29 00:09:52,386 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-29 00:09:52,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 125 transitions, 266 flow [2023-11-29 00:09:52,413 INFO L124 PetriNetUnfolderBase]: 47/235 cut-off events. [2023-11-29 00:09:52,413 INFO L125 PetriNetUnfolderBase]: For 6/7 co-relation queries the response was YES. [2023-11-29 00:09:52,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247 conditions, 235 events. 47/235 cut-off events. For 6/7 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1069 event pairs, 0 based on Foata normal form. 0/163 useless extension candidates. Maximal degree in co-relation 142. Up to 9 conditions per place. [2023-11-29 00:09:52,416 INFO L82 GeneralOperation]: Start removeDead. Operand has 104 places, 125 transitions, 266 flow [2023-11-29 00:09:52,419 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 125 transitions, 266 flow [2023-11-29 00:09:52,420 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:09:52,421 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@bbf3bae, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:09:52,422 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-29 00:09:52,423 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 00:09:52,423 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-29 00:09:52,423 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 00:09:52,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:09:52,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 00:09:52,424 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-29 00:09:52,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:09:52,424 INFO L85 PathProgramCache]: Analyzing trace with hash 561478, now seen corresponding path program 1 times [2023-11-29 00:09:52,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:09:52,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834991826] [2023-11-29 00:09:52,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:09:52,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:09:52,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:09:52,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:09:52,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:09:52,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834991826] [2023-11-29 00:09:52,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834991826] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:09:52,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:09:52,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 00:09:52,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74626753] [2023-11-29 00:09:52,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:09:52,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:09:52,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:09:52,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:09:52,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:09:52,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 125 [2023-11-29 00:09:52,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 125 transitions, 266 flow. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:09:52,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:09:52,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 125 [2023-11-29 00:09:52,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:09:54,550 INFO L124 PetriNetUnfolderBase]: 8837/17944 cut-off events. [2023-11-29 00:09:54,550 INFO L125 PetriNetUnfolderBase]: For 139/139 co-relation queries the response was YES. [2023-11-29 00:09:54,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31575 conditions, 17944 events. 8837/17944 cut-off events. For 139/139 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 162938 event pairs, 7397 based on Foata normal form. 3926/21246 useless extension candidates. Maximal degree in co-relation 12844. Up to 12263 conditions per place. [2023-11-29 00:09:54,676 INFO L140 encePairwiseOnDemand]: 99/125 looper letters, 76 selfloop transitions, 2 changer transitions 1/126 dead transitions. [2023-11-29 00:09:54,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 126 transitions, 426 flow [2023-11-29 00:09:54,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:09:54,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:09:54,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 256 transitions. [2023-11-29 00:09:54,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6826666666666666 [2023-11-29 00:09:54,679 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 256 transitions. [2023-11-29 00:09:54,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 256 transitions. [2023-11-29 00:09:54,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:09:54,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 256 transitions. [2023-11-29 00:09:54,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:09:54,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 125.0) internal successors, (500), 4 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:09:54,682 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 125.0) internal successors, (500), 4 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:09:54,683 INFO L175 Difference]: Start difference. First operand has 104 places, 125 transitions, 266 flow. Second operand 3 states and 256 transitions. [2023-11-29 00:09:54,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 126 transitions, 426 flow [2023-11-29 00:09:54,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 126 transitions, 426 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 00:09:54,688 INFO L231 Difference]: Finished difference. Result has 103 places, 99 transitions, 218 flow [2023-11-29 00:09:54,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=218, PETRI_PLACES=103, PETRI_TRANSITIONS=99} [2023-11-29 00:09:54,689 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, -1 predicate places. [2023-11-29 00:09:54,689 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 99 transitions, 218 flow [2023-11-29 00:09:54,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:09:54,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:09:54,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 00:09:54,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 00:09:54,690 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-29 00:09:54,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:09:54,690 INFO L85 PathProgramCache]: Analyzing trace with hash 561479, now seen corresponding path program 1 times [2023-11-29 00:09:54,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:09:54,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128189689] [2023-11-29 00:09:54,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:09:54,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:09:54,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:09:54,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:09:54,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:09:54,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128189689] [2023-11-29 00:09:54,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128189689] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:09:54,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:09:54,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 00:09:54,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020606031] [2023-11-29 00:09:54,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:09:54,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:09:54,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:09:54,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:09:54,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:09:54,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 125 [2023-11-29 00:09:54,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 99 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:09:54,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:09:54,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 125 [2023-11-29 00:09:54,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:09:56,429 INFO L124 PetriNetUnfolderBase]: 7996/16863 cut-off events. [2023-11-29 00:09:56,429 INFO L125 PetriNetUnfolderBase]: For 214/214 co-relation queries the response was YES. [2023-11-29 00:09:56,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29414 conditions, 16863 events. 7996/16863 cut-off events. For 214/214 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 155956 event pairs, 6786 based on Foata normal form. 1/16039 useless extension candidates. Maximal degree in co-relation 27666. Up to 12231 conditions per place. [2023-11-29 00:09:56,507 INFO L140 encePairwiseOnDemand]: 121/125 looper letters, 64 selfloop transitions, 2 changer transitions 0/114 dead transitions. [2023-11-29 00:09:56,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 114 transitions, 380 flow [2023-11-29 00:09:56,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:09:56,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:09:56,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 218 transitions. [2023-11-29 00:09:56,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813333333333334 [2023-11-29 00:09:56,509 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 218 transitions. [2023-11-29 00:09:56,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 218 transitions. [2023-11-29 00:09:56,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:09:56,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 218 transitions. [2023-11-29 00:09:56,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:09:56,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 125.0) internal successors, (500), 4 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:09:56,512 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 125.0) internal successors, (500), 4 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:09:56,512 INFO L175 Difference]: Start difference. First operand has 103 places, 99 transitions, 218 flow. Second operand 3 states and 218 transitions. [2023-11-29 00:09:56,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 114 transitions, 380 flow [2023-11-29 00:09:56,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 114 transitions, 376 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 00:09:56,528 INFO L231 Difference]: Finished difference. Result has 103 places, 100 transitions, 228 flow [2023-11-29 00:09:56,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=228, PETRI_PLACES=103, PETRI_TRANSITIONS=100} [2023-11-29 00:09:56,529 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, -1 predicate places. [2023-11-29 00:09:56,529 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 100 transitions, 228 flow [2023-11-29 00:09:56,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:09:56,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:09:56,530 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-11-29 00:09:56,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 00:09:56,531 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-29 00:09:56,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:09:56,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1135194623, now seen corresponding path program 1 times [2023-11-29 00:09:56,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:09:56,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880597081] [2023-11-29 00:09:56,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:09:56,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:09:56,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:09:56,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:09:56,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:09:56,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880597081] [2023-11-29 00:09:56,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880597081] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:09:56,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351863977] [2023-11-29 00:09:56,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:09:56,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:09:56,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db77a1ef-0527-45f6-bdc7-6858fbf73033/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:09:56,622 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db77a1ef-0527-45f6-bdc7-6858fbf73033/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:09:56,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db77a1ef-0527-45f6-bdc7-6858fbf73033/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 00:09:56,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:09:56,704 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 00:09:56,705 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:09:56,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:09:56,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:09:56,768 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:09:56,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:09:56,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351863977] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:09:56,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:09:56,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-11-29 00:09:56,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771733927] [2023-11-29 00:09:56,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:09:56,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 00:09:56,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:09:56,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 00:09:56,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:09:56,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 125 [2023-11-29 00:09:56,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 100 transitions, 228 flow. Second operand has 7 states, 7 states have (on average 51.42857142857143) internal successors, (360), 7 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:09:56,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:09:56,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 125 [2023-11-29 00:09:56,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:09:58,246 INFO L124 PetriNetUnfolderBase]: 7786/16097 cut-off events. [2023-11-29 00:09:58,246 INFO L125 PetriNetUnfolderBase]: For 716/716 co-relation queries the response was YES. [2023-11-29 00:09:58,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28325 conditions, 16097 events. 7786/16097 cut-off events. For 716/716 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 143081 event pairs, 2872 based on Foata normal form. 224/15934 useless extension candidates. Maximal degree in co-relation 26218. Up to 9511 conditions per place. [2023-11-29 00:09:58,323 INFO L140 encePairwiseOnDemand]: 121/125 looper letters, 117 selfloop transitions, 4 changer transitions 0/168 dead transitions. [2023-11-29 00:09:58,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 168 transitions, 604 flow [2023-11-29 00:09:58,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:09:58,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 00:09:58,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 369 transitions. [2023-11-29 00:09:58,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5904 [2023-11-29 00:09:58,326 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 369 transitions. [2023-11-29 00:09:58,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 369 transitions. [2023-11-29 00:09:58,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:09:58,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 369 transitions. [2023-11-29 00:09:58,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 73.8) internal successors, (369), 5 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:09:58,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 125.0) internal successors, (750), 6 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:09:58,330 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 125.0) internal successors, (750), 6 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:09:58,330 INFO L175 Difference]: Start difference. First operand has 103 places, 100 transitions, 228 flow. Second operand 5 states and 369 transitions. [2023-11-29 00:09:58,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 168 transitions, 604 flow [2023-11-29 00:09:58,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 168 transitions, 602 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 00:09:58,334 INFO L231 Difference]: Finished difference. Result has 105 places, 99 transitions, 230 flow [2023-11-29 00:09:58,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=125, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=230, PETRI_PLACES=105, PETRI_TRANSITIONS=99} [2023-11-29 00:09:58,335 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 1 predicate places. [2023-11-29 00:09:58,335 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 99 transitions, 230 flow [2023-11-29 00:09:58,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 51.42857142857143) internal successors, (360), 7 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:09:58,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:09:58,336 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1] [2023-11-29 00:09:58,340 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db77a1ef-0527-45f6-bdc7-6858fbf73033/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 00:09:58,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db77a1ef-0527-45f6-bdc7-6858fbf73033/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 00:09:58,540 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-29 00:09:58,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:09:58,540 INFO L85 PathProgramCache]: Analyzing trace with hash -959532169, now seen corresponding path program 1 times [2023-11-29 00:09:58,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:09:58,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928882474] [2023-11-29 00:09:58,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:09:58,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:09:58,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 00:09:58,557 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 00:09:58,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 00:09:58,573 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 00:09:58,573 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 00:09:58,574 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-29 00:09:58,574 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-11-29 00:09:58,574 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-11-29 00:09:58,574 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-11-29 00:09:58,575 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-11-29 00:09:58,575 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-11-29 00:09:58,575 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-11-29 00:09:58,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-29 00:09:58,575 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-29 00:09:58,576 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 00:09:58,576 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-29 00:09:58,607 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-29 00:09:58,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 161 transitions, 349 flow [2023-11-29 00:09:58,643 INFO L124 PetriNetUnfolderBase]: 69/353 cut-off events. [2023-11-29 00:09:58,643 INFO L125 PetriNetUnfolderBase]: For 19/22 co-relation queries the response was YES. [2023-11-29 00:09:58,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 378 conditions, 353 events. 69/353 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1773 event pairs, 1 based on Foata normal form. 0/244 useless extension candidates. Maximal degree in co-relation 246. Up to 12 conditions per place. [2023-11-29 00:09:58,646 INFO L82 GeneralOperation]: Start removeDead. Operand has 134 places, 161 transitions, 349 flow [2023-11-29 00:09:58,649 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 134 places, 161 transitions, 349 flow [2023-11-29 00:09:58,651 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:09:58,651 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@bbf3bae, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:09:58,651 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-29 00:09:58,653 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 00:09:58,653 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-29 00:09:58,653 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 00:09:58,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:09:58,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 00:09:58,653 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-29 00:09:58,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:09:58,654 INFO L85 PathProgramCache]: Analyzing trace with hash 721351, now seen corresponding path program 1 times [2023-11-29 00:09:58,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:09:58,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823842005] [2023-11-29 00:09:58,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:09:58,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:09:58,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:09:58,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:09:58,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:09:58,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823842005] [2023-11-29 00:09:58,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823842005] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:09:58,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:09:58,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 00:09:58,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200381063] [2023-11-29 00:09:58,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:09:58,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:09:58,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:09:58,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:09:58,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:09:58,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 161 [2023-11-29 00:09:58,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 161 transitions, 349 flow. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:09:58,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:09:58,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 161 [2023-11-29 00:09:58,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:10:25,272 INFO L124 PetriNetUnfolderBase]: 192014/323708 cut-off events. [2023-11-29 00:10:25,272 INFO L125 PetriNetUnfolderBase]: For 4143/4143 co-relation queries the response was YES. [2023-11-29 00:10:25,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 584459 conditions, 323708 events. 192014/323708 cut-off events. For 4143/4143 co-relation queries the response was YES. Maximal size of possible extension queue 6562. Compared 3462519 event pairs, 160330 based on Foata normal form. 73869/387505 useless extension candidates. Maximal degree in co-relation 100250. Up to 233593 conditions per place. [2023-11-29 00:10:26,735 INFO L140 encePairwiseOnDemand]: 129/161 looper letters, 104 selfloop transitions, 2 changer transitions 1/169 dead transitions. [2023-11-29 00:10:26,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 169 transitions, 579 flow [2023-11-29 00:10:26,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:10:26,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:10:26,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 341 transitions. [2023-11-29 00:10:26,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7060041407867494 [2023-11-29 00:10:26,737 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 341 transitions. [2023-11-29 00:10:26,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 341 transitions. [2023-11-29 00:10:26,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:10:26,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 341 transitions. [2023-11-29 00:10:26,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:10:26,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:10:26,741 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:10:26,741 INFO L175 Difference]: Start difference. First operand has 134 places, 161 transitions, 349 flow. Second operand 3 states and 341 transitions. [2023-11-29 00:10:26,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 169 transitions, 579 flow [2023-11-29 00:10:26,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 169 transitions, 579 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 00:10:26,746 INFO L231 Difference]: Finished difference. Result has 133 places, 129 transitions, 289 flow [2023-11-29 00:10:26,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=289, PETRI_PLACES=133, PETRI_TRANSITIONS=129} [2023-11-29 00:10:26,748 INFO L281 CegarLoopForPetriNet]: 134 programPoint places, -1 predicate places. [2023-11-29 00:10:26,748 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 129 transitions, 289 flow [2023-11-29 00:10:26,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:10:26,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:10:26,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 00:10:26,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-29 00:10:26,749 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-29 00:10:26,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:10:26,749 INFO L85 PathProgramCache]: Analyzing trace with hash 721352, now seen corresponding path program 1 times [2023-11-29 00:10:26,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:10:26,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401321651] [2023-11-29 00:10:26,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:10:26,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:10:26,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:10:26,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:10:26,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:10:26,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401321651] [2023-11-29 00:10:26,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401321651] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:10:26,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:10:26,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 00:10:26,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470193398] [2023-11-29 00:10:26,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:10:26,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:10:26,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:10:26,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:10:26,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:10:26,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 161 [2023-11-29 00:10:26,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 129 transitions, 289 flow. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:10:26,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:10:26,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 161 [2023-11-29 00:10:26,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:10:50,569 INFO L124 PetriNetUnfolderBase]: 173113/301237 cut-off events. [2023-11-29 00:10:50,570 INFO L125 PetriNetUnfolderBase]: For 5823/5823 co-relation queries the response was YES. [2023-11-29 00:10:51,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 539698 conditions, 301237 events. 173113/301237 cut-off events. For 5823/5823 co-relation queries the response was YES. Maximal size of possible extension queue 6283. Compared 3314371 event pairs, 151767 based on Foata normal form. 1/288832 useless extension candidates. Maximal degree in co-relation 506897. Up to 233561 conditions per place. [2023-11-29 00:10:52,174 INFO L140 encePairwiseOnDemand]: 157/161 looper letters, 79 selfloop transitions, 2 changer transitions 0/144 dead transitions. [2023-11-29 00:10:52,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 144 transitions, 481 flow [2023-11-29 00:10:52,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:10:52,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 00:10:52,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 278 transitions. [2023-11-29 00:10:52,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5755693581780539 [2023-11-29 00:10:52,176 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 278 transitions. [2023-11-29 00:10:52,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 278 transitions. [2023-11-29 00:10:52,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:10:52,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 278 transitions. [2023-11-29 00:10:52,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:10:52,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:10:52,179 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:10:52,179 INFO L175 Difference]: Start difference. First operand has 133 places, 129 transitions, 289 flow. Second operand 3 states and 278 transitions. [2023-11-29 00:10:52,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 144 transitions, 481 flow [2023-11-29 00:10:54,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 144 transitions, 477 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 00:10:54,378 INFO L231 Difference]: Finished difference. Result has 133 places, 130 transitions, 299 flow [2023-11-29 00:10:54,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=299, PETRI_PLACES=133, PETRI_TRANSITIONS=130} [2023-11-29 00:10:54,379 INFO L281 CegarLoopForPetriNet]: 134 programPoint places, -1 predicate places. [2023-11-29 00:10:54,379 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 130 transitions, 299 flow [2023-11-29 00:10:54,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:10:54,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:10:54,380 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-11-29 00:10:54,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-29 00:10:54,380 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-29 00:10:54,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:10:54,380 INFO L85 PathProgramCache]: Analyzing trace with hash 487959264, now seen corresponding path program 1 times [2023-11-29 00:10:54,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:10:54,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836631162] [2023-11-29 00:10:54,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:10:54,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:10:54,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:10:54,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:10:54,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:10:54,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836631162] [2023-11-29 00:10:54,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836631162] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:10:54,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243160004] [2023-11-29 00:10:54,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:10:54,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:10:54,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db77a1ef-0527-45f6-bdc7-6858fbf73033/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:10:54,465 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db77a1ef-0527-45f6-bdc7-6858fbf73033/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:10:54,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db77a1ef-0527-45f6-bdc7-6858fbf73033/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 00:10:54,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:10:54,548 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 00:10:54,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:10:54,560 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 [2023-11-29 00:10:54,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:10:54,613 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:10:54,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:10:54,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243160004] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:10:54,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:10:54,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2023-11-29 00:10:54,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690072163] [2023-11-29 00:10:54,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:10:54,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 00:10:54,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:10:54,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 00:10:54,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-29 00:10:54,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 161 [2023-11-29 00:10:54,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 130 transitions, 299 flow. Second operand has 9 states, 9 states have (on average 66.33333333333333) internal successors, (597), 9 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:10:54,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:10:54,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 161 [2023-11-29 00:10:54,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 00:10:58,231 INFO L124 PetriNetUnfolderBase]: 31431/49563 cut-off events. [2023-11-29 00:10:58,231 INFO L125 PetriNetUnfolderBase]: For 12540/12540 co-relation queries the response was YES. [2023-11-29 00:10:58,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96436 conditions, 49563 events. 31431/49563 cut-off events. For 12540/12540 co-relation queries the response was YES. Maximal size of possible extension queue 1354. Compared 411875 event pairs, 2880 based on Foata normal form. 5908/53783 useless extension candidates. Maximal degree in co-relation 89445. Up to 32550 conditions per place. [2023-11-29 00:10:58,444 INFO L140 encePairwiseOnDemand]: 157/161 looper letters, 128 selfloop transitions, 4 changer transitions 0/178 dead transitions. [2023-11-29 00:10:58,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 178 transitions, 648 flow [2023-11-29 00:10:58,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:10:58,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 00:10:58,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 522 transitions. [2023-11-29 00:10:58,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5403726708074534 [2023-11-29 00:10:58,448 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 522 transitions. [2023-11-29 00:10:58,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 522 transitions. [2023-11-29 00:10:58,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 00:10:58,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 522 transitions. [2023-11-29 00:10:58,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 87.0) internal successors, (522), 6 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:10:58,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 161.0) internal successors, (1127), 7 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:10:58,452 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 161.0) internal successors, (1127), 7 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:10:58,452 INFO L175 Difference]: Start difference. First operand has 133 places, 130 transitions, 299 flow. Second operand 6 states and 522 transitions. [2023-11-29 00:10:58,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 178 transitions, 648 flow [2023-11-29 00:10:58,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 178 transitions, 644 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-29 00:10:58,459 INFO L231 Difference]: Finished difference. Result has 103 places, 94 transitions, 220 flow [2023-11-29 00:10:58,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=220, PETRI_PLACES=103, PETRI_TRANSITIONS=94} [2023-11-29 00:10:58,460 INFO L281 CegarLoopForPetriNet]: 134 programPoint places, -31 predicate places. [2023-11-29 00:10:58,460 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 94 transitions, 220 flow [2023-11-29 00:10:58,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 66.33333333333333) internal successors, (597), 9 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:10:58,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:10:58,460 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1] [2023-11-29 00:10:58,464 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db77a1ef-0527-45f6-bdc7-6858fbf73033/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 00:10:58,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db77a1ef-0527-45f6-bdc7-6858fbf73033/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:10:58,661 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-29 00:10:58,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:10:58,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1878108679, now seen corresponding path program 1 times [2023-11-29 00:10:58,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:10:58,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537410358] [2023-11-29 00:10:58,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:10:58,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:10:58,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 00:10:58,677 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 00:10:58,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 00:10:58,693 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 00:10:58,693 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 00:10:58,693 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-29 00:10:58,693 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-11-29 00:10:58,693 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-11-29 00:10:58,694 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-11-29 00:10:58,694 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-11-29 00:10:58,694 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-11-29 00:10:58,694 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-11-29 00:10:58,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-29 00:10:58,695 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-29 00:10:58,695 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 00:10:58,695 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-29 00:10:58,727 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-29 00:10:58,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 197 transitions, 434 flow [2023-11-29 00:10:58,770 INFO L124 PetriNetUnfolderBase]: 99/515 cut-off events. [2023-11-29 00:10:58,771 INFO L125 PetriNetUnfolderBase]: For 48/53 co-relation queries the response was YES. [2023-11-29 00:10:58,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 566 conditions, 515 events. 99/515 cut-off events. For 48/53 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2753 event pairs, 6 based on Foata normal form. 0/353 useless extension candidates. Maximal degree in co-relation 377. Up to 32 conditions per place. [2023-11-29 00:10:58,773 INFO L82 GeneralOperation]: Start removeDead. Operand has 164 places, 197 transitions, 434 flow [2023-11-29 00:10:58,777 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 164 places, 197 transitions, 434 flow [2023-11-29 00:10:58,778 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:10:58,779 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@bbf3bae, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:10:58,779 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-29 00:10:58,780 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 00:10:58,780 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-29 00:10:58,780 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 00:10:58,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 00:10:58,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 00:10:58,780 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-29 00:10:58,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:10:58,781 INFO L85 PathProgramCache]: Analyzing trace with hash 916972, now seen corresponding path program 1 times [2023-11-29 00:10:58,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:10:58,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61975803] [2023-11-29 00:10:58,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:10:58,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:10:58,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:10:58,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:10:58,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:10:58,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61975803] [2023-11-29 00:10:58,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61975803] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:10:58,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:10:58,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 00:10:58,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385850541] [2023-11-29 00:10:58,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:10:58,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:10:58,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:10:58,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:10:58,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:10:58,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 197 [2023-11-29 00:10:58,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 197 transitions, 434 flow. Second operand has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:10:58,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 00:10:58,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 197 [2023-11-29 00:10:58,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand