./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_cea4df81-fc79-44e5-8c90-364b21f28c89/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea4df81-fc79-44e5-8c90-364b21f28c89/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea4df81-fc79-44e5-8c90-364b21f28c89/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea4df81-fc79-44e5-8c90-364b21f28c89/bin/uautomizer-verify-NlZe1sFDwI/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_cea4df81-fc79-44e5-8c90-364b21f28c89/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea4df81-fc79-44e5-8c90-364b21f28c89/bin/uautomizer-verify-NlZe1sFDwI --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 [2023-11-24 21:58:48,135 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:58:48,229 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea4df81-fc79-44e5-8c90-364b21f28c89/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 21:58:48,236 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:58:48,237 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:58:48,268 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:58:48,269 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:58:48,269 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:58:48,270 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:58:48,271 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:58:48,272 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:58:48,273 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:58:48,274 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:58:48,274 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:58:48,275 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:58:48,276 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:58:48,276 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:58:48,277 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:58:48,278 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:58:48,278 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:58:48,279 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:58:48,280 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:58:48,281 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:58:48,281 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:58:48,282 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:58:48,282 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:58:48,283 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:58:48,284 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:58:48,284 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:58:48,285 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:58:48,285 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:58:48,286 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:58:48,287 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:58:48,287 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:58:48,288 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:58:48,288 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:58:48,289 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:58:48,289 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:58:48,289 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:58:48,290 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:58:48,290 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:58:48,291 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_cea4df81-fc79-44e5-8c90-364b21f28c89/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea4df81-fc79-44e5-8c90-364b21f28c89/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b4399e58ed3ca9c75e2a61372e91a4308548a0e79a3eb4428d85990bd71242f7 [2023-11-24 21:58:48,588 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:58:48,626 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:58:48,629 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:58:48,631 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:58:48,633 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:58:48,634 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea4df81-fc79-44e5-8c90-364b21f28c89/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i [2023-11-24 21:58:51,767 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:58:52,024 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:58:52,025 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea4df81-fc79-44e5-8c90-364b21f28c89/sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i [2023-11-24 21:58:52,063 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea4df81-fc79-44e5-8c90-364b21f28c89/bin/uautomizer-verify-NlZe1sFDwI/data/9067a8271/ad57f2ad0dd34a149aaf777d4132cedc/FLAGdeade3cb3 [2023-11-24 21:58:52,076 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea4df81-fc79-44e5-8c90-364b21f28c89/bin/uautomizer-verify-NlZe1sFDwI/data/9067a8271/ad57f2ad0dd34a149aaf777d4132cedc [2023-11-24 21:58:52,079 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:58:52,081 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:58:52,083 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:58:52,083 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:58:52,090 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:58:52,091 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:58:52" (1/1) ... [2023-11-24 21:58:52,092 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14317649 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:52, skipping insertion in model container [2023-11-24 21:58:52,092 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:58:52" (1/1) ... [2023-11-24 21:58:52,140 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:58:52,517 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:58:52,531 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:58:52,577 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:58:52,621 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:58:52,621 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:52 WrapperNode [2023-11-24 21:58:52,621 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:58:52,623 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:58:52,623 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:58:52,623 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:58:52,631 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:52" (1/1) ... [2023-11-24 21:58:52,646 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:52" (1/1) ... [2023-11-24 21:58:52,671 INFO L138 Inliner]: procedures = 171, calls = 44, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 112 [2023-11-24 21:58:52,672 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:58:52,672 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:58:52,673 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:58:52,673 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:58:52,684 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:52" (1/1) ... [2023-11-24 21:58:52,685 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:52" (1/1) ... [2023-11-24 21:58:52,688 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:52" (1/1) ... [2023-11-24 21:58:52,713 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]. [2023-11-24 21:58:52,715 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:52" (1/1) ... [2023-11-24 21:58:52,716 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:52" (1/1) ... [2023-11-24 21:58:52,728 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:52" (1/1) ... [2023-11-24 21:58:52,741 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:52" (1/1) ... [2023-11-24 21:58:52,745 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:52" (1/1) ... [2023-11-24 21:58:52,752 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:52" (1/1) ... [2023-11-24 21:58:52,756 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:58:52,764 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:58:52,764 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:58:52,765 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:58:52,766 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:52" (1/1) ... [2023-11-24 21:58:52,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:58:52,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea4df81-fc79-44e5-8c90-364b21f28c89/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:58:52,813 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea4df81-fc79-44e5-8c90-364b21f28c89/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:58:52,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea4df81-fc79-44e5-8c90-364b21f28c89/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:58:52,867 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 21:58:52,867 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 21:58:52,867 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-24 21:58:52,868 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-24 21:58:52,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 21:58:52,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 21:58:52,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 21:58:52,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-24 21:58:52,869 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-24 21:58:52,870 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:58:52,870 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:58:52,870 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-24 21:58:52,872 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-24 21:58:52,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:58:52,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:58:52,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 21:58:52,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 21:58:52,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-24 21:58:52,873 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-24 21:58:52,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:58:52,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:58:52,876 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-24 21:58:53,094 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:58:53,096 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:58:53,412 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:58:53,663 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:58:53,663 INFO L309 CfgBuilder]: Removed 16 assume(true) statements. [2023-11-24 21:58:53,664 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:58:53 BoogieIcfgContainer [2023-11-24 21:58:53,665 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:58:53,669 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:58:53,669 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:58:53,673 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:58:53,674 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:58:52" (1/3) ... [2023-11-24 21:58:53,675 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@437e7a30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:58:53, skipping insertion in model container [2023-11-24 21:58:53,675 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:58:52" (2/3) ... [2023-11-24 21:58:53,677 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@437e7a30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:58:53, skipping insertion in model container [2023-11-24 21:58:53,678 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:58:53" (3/3) ... [2023-11-24 21:58:53,679 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_61-invariant_racing.i [2023-11-24 21:58:53,702 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:58:53,707 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-11-24 21:58:53,708 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 21:58:53,760 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-24 21:58:53,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 74 places, 89 transitions, 185 flow [2023-11-24 21:58:53,913 INFO L124 PetriNetUnfolderBase]: 28/138 cut-off events. [2023-11-24 21:58:53,913 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-24 21:58:53,928 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. [2023-11-24 21:58:53,928 INFO L82 GeneralOperation]: Start removeDead. Operand has 74 places, 89 transitions, 185 flow [2023-11-24 21:58:53,937 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 89 transitions, 185 flow [2023-11-24 21:58:53,977 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:58:53,986 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;@18b095ad, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:58:53,986 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-24 21:58:53,993 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:58:53,994 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-24 21:58:53,994 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:58:53,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:58:53,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 21:58:53,996 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)] === [2023-11-24 21:58:54,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:54,005 INFO L85 PathProgramCache]: Analyzing trace with hash 437353, now seen corresponding path program 1 times [2023-11-24 21:58:54,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:54,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404626954] [2023-11-24 21:58:54,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:54,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:54,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:54,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:54,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:54,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404626954] [2023-11-24 21:58:54,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404626954] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:54,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:54,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:58:54,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435214744] [2023-11-24 21:58:54,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:54,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:58:54,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:54,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:58:54,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:58:54,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 89 [2023-11-24 21:58:54,377 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) [2023-11-24 21:58:54,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:58:54,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 89 [2023-11-24 21:58:54,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:58:54,666 INFO L124 PetriNetUnfolderBase]: 296/914 cut-off events. [2023-11-24 21:58:54,666 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-24 21:58:54,671 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. [2023-11-24 21:58:54,678 INFO L140 encePairwiseOnDemand]: 69/89 looper letters, 48 selfloop transitions, 2 changer transitions 1/83 dead transitions. [2023-11-24 21:58:54,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 83 transitions, 275 flow [2023-11-24 21:58:54,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:58:54,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:58:54,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 171 transitions. [2023-11-24 21:58:54,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6404494382022472 [2023-11-24 21:58:54,693 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 171 transitions. [2023-11-24 21:58:54,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 171 transitions. [2023-11-24 21:58:54,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:58:54,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 171 transitions. [2023-11-24 21:58:54,701 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) [2023-11-24 21:58:54,710 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) [2023-11-24 21:58:54,710 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) [2023-11-24 21:58:54,712 INFO L175 Difference]: Start difference. First operand has 74 places, 89 transitions, 185 flow. Second operand 3 states and 171 transitions. [2023-11-24 21:58:54,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 83 transitions, 275 flow [2023-11-24 21:58:54,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 83 transitions, 275 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-24 21:58:54,724 INFO L231 Difference]: Finished difference. Result has 73 places, 69 transitions, 149 flow [2023-11-24 21:58:54,726 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} [2023-11-24 21:58:54,735 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -1 predicate places. [2023-11-24 21:58:54,735 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 69 transitions, 149 flow [2023-11-24 21:58:54,736 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) [2023-11-24 21:58:54,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:58:54,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 21:58:54,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:58:54,736 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)] === [2023-11-24 21:58:54,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:54,738 INFO L85 PathProgramCache]: Analyzing trace with hash 437354, now seen corresponding path program 1 times [2023-11-24 21:58:54,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:54,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740329870] [2023-11-24 21:58:54,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:54,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:54,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:54,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:54,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:54,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740329870] [2023-11-24 21:58:54,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740329870] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:54,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:54,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:58:54,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321269963] [2023-11-24 21:58:54,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:54,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:58:55,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:55,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:58:55,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:58:55,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 89 [2023-11-24 21:58:55,023 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) [2023-11-24 21:58:55,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:58:55,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 89 [2023-11-24 21:58:55,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:58:55,308 INFO L124 PetriNetUnfolderBase]: 248/804 cut-off events. [2023-11-24 21:58:55,309 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-24 21:58:55,311 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. [2023-11-24 21:58:55,315 INFO L140 encePairwiseOnDemand]: 85/89 looper letters, 48 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2023-11-24 21:58:55,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 83 transitions, 277 flow [2023-11-24 21:58:55,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:58:55,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:58:55,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 157 transitions. [2023-11-24 21:58:55,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5880149812734082 [2023-11-24 21:58:55,323 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 157 transitions. [2023-11-24 21:58:55,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 157 transitions. [2023-11-24 21:58:55,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:58:55,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 157 transitions. [2023-11-24 21:58:55,330 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) [2023-11-24 21:58:55,331 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) [2023-11-24 21:58:55,332 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) [2023-11-24 21:58:55,333 INFO L175 Difference]: Start difference. First operand has 73 places, 69 transitions, 149 flow. Second operand 3 states and 157 transitions. [2023-11-24 21:58:55,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 83 transitions, 277 flow [2023-11-24 21:58:55,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 83 transitions, 273 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:58:55,344 INFO L231 Difference]: Finished difference. Result has 73 places, 69 transitions, 155 flow [2023-11-24 21:58:55,344 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} [2023-11-24 21:58:55,345 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -1 predicate places. [2023-11-24 21:58:55,346 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 69 transitions, 155 flow [2023-11-24 21:58:55,346 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) [2023-11-24 21:58:55,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:58:55,348 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-11-24 21:58:55,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:58:55,355 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)] === [2023-11-24 21:58:55,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:55,356 INFO L85 PathProgramCache]: Analyzing trace with hash 192017350, now seen corresponding path program 1 times [2023-11-24 21:58:55,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:55,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163318677] [2023-11-24 21:58:55,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:55,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:55,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:55,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:55,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:55,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163318677] [2023-11-24 21:58:55,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163318677] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:58:55,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078472509] [2023-11-24 21:58:55,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:55,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:58:55,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea4df81-fc79-44e5-8c90-364b21f28c89/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:58:55,536 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea4df81-fc79-44e5-8c90-364b21f28c89/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:58:55,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea4df81-fc79-44e5-8c90-364b21f28c89/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 21:58:55,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:55,641 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-24 21:58:55,647 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:58:55,712 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 [2023-11-24 21:58:55,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:55,781 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:58:55,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:55,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078472509] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:58:55,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:58:55,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2023-11-24 21:58:55,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480857685] [2023-11-24 21:58:55,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:58:55,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 21:58:55,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:55,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 21:58:55,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-24 21:58:55,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2023-11-24 21:58:55,942 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) [2023-11-24 21:58:55,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:58:55,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2023-11-24 21:58:55,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:58:56,064 INFO L124 PetriNetUnfolderBase]: 43/154 cut-off events. [2023-11-24 21:58:56,064 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2023-11-24 21:58:56,065 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. [2023-11-24 21:58:56,066 INFO L140 encePairwiseOnDemand]: 85/89 looper letters, 31 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2023-11-24 21:58:56,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 49 transitions, 174 flow [2023-11-24 21:58:56,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:58:56,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:58:56,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 171 transitions. [2023-11-24 21:58:56,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4803370786516854 [2023-11-24 21:58:56,069 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 171 transitions. [2023-11-24 21:58:56,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 171 transitions. [2023-11-24 21:58:56,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:58:56,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 171 transitions. [2023-11-24 21:58:56,070 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) [2023-11-24 21:58:56,072 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) [2023-11-24 21:58:56,072 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) [2023-11-24 21:58:56,073 INFO L175 Difference]: Start difference. First operand has 73 places, 69 transitions, 155 flow. Second operand 4 states and 171 transitions. [2023-11-24 21:58:56,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 49 transitions, 174 flow [2023-11-24 21:58:56,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 49 transitions, 168 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-24 21:58:56,075 INFO L231 Difference]: Finished difference. Result has 39 places, 34 transitions, 76 flow [2023-11-24 21:58:56,075 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} [2023-11-24 21:58:56,076 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, -35 predicate places. [2023-11-24 21:58:56,076 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 34 transitions, 76 flow [2023-11-24 21:58:56,077 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) [2023-11-24 21:58:56,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:58:56,077 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2023-11-24 21:58:56,088 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea4df81-fc79-44e5-8c90-364b21f28c89/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-24 21:58:56,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea4df81-fc79-44e5-8c90-364b21f28c89/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:58:56,283 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)] === [2023-11-24 21:58:56,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:56,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1657570988, now seen corresponding path program 1 times [2023-11-24 21:58:56,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:56,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680197067] [2023-11-24 21:58:56,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:56,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:56,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 21:58:56,302 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-24 21:58:56,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 21:58:56,332 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-24 21:58:56,332 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-24 21:58:56,333 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-24 21:58:56,337 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-11-24 21:58:56,338 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-11-24 21:58:56,338 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-11-24 21:58:56,338 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-11-24 21:58:56,338 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-11-24 21:58:56,339 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-11-24 21:58:56,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 21:58:56,339 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-24 21:58:56,342 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-24 21:58:56,342 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-24 21:58:56,377 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-24 21:58:56,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 125 transitions, 266 flow [2023-11-24 21:58:56,407 INFO L124 PetriNetUnfolderBase]: 47/235 cut-off events. [2023-11-24 21:58:56,408 INFO L125 PetriNetUnfolderBase]: For 6/7 co-relation queries the response was YES. [2023-11-24 21:58:56,411 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. [2023-11-24 21:58:56,411 INFO L82 GeneralOperation]: Start removeDead. Operand has 104 places, 125 transitions, 266 flow [2023-11-24 21:58:56,415 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 125 transitions, 266 flow [2023-11-24 21:58:56,416 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:58:56,417 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;@18b095ad, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:58:56,418 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-24 21:58:56,420 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:58:56,420 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-24 21:58:56,420 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:58:56,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:58:56,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 21:58:56,421 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)] === [2023-11-24 21:58:56,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:56,421 INFO L85 PathProgramCache]: Analyzing trace with hash 561478, now seen corresponding path program 1 times [2023-11-24 21:58:56,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:56,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131692835] [2023-11-24 21:58:56,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:56,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:56,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:56,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:56,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:56,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131692835] [2023-11-24 21:58:56,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131692835] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:56,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:56,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:58:56,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257358213] [2023-11-24 21:58:56,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:56,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:58:56,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:56,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:58:56,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:58:56,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 125 [2023-11-24 21:58:56,514 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) [2023-11-24 21:58:56,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:58:56,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 125 [2023-11-24 21:58:56,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:58:59,170 INFO L124 PetriNetUnfolderBase]: 8837/17944 cut-off events. [2023-11-24 21:58:59,170 INFO L125 PetriNetUnfolderBase]: For 139/139 co-relation queries the response was YES. [2023-11-24 21:58:59,213 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. [2023-11-24 21:58:59,325 INFO L140 encePairwiseOnDemand]: 99/125 looper letters, 76 selfloop transitions, 2 changer transitions 1/126 dead transitions. [2023-11-24 21:58:59,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 126 transitions, 426 flow [2023-11-24 21:58:59,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:58:59,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:58:59,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 256 transitions. [2023-11-24 21:58:59,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6826666666666666 [2023-11-24 21:58:59,328 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 256 transitions. [2023-11-24 21:58:59,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 256 transitions. [2023-11-24 21:58:59,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:58:59,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 256 transitions. [2023-11-24 21:58:59,329 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) [2023-11-24 21:58:59,332 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) [2023-11-24 21:58:59,332 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) [2023-11-24 21:58:59,332 INFO L175 Difference]: Start difference. First operand has 104 places, 125 transitions, 266 flow. Second operand 3 states and 256 transitions. [2023-11-24 21:58:59,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 126 transitions, 426 flow [2023-11-24 21:58:59,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 126 transitions, 426 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-24 21:58:59,338 INFO L231 Difference]: Finished difference. Result has 103 places, 99 transitions, 218 flow [2023-11-24 21:58:59,338 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} [2023-11-24 21:58:59,339 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, -1 predicate places. [2023-11-24 21:58:59,340 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 99 transitions, 218 flow [2023-11-24 21:58:59,340 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) [2023-11-24 21:58:59,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:58:59,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 21:58:59,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 21:58:59,341 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)] === [2023-11-24 21:58:59,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:58:59,341 INFO L85 PathProgramCache]: Analyzing trace with hash 561479, now seen corresponding path program 1 times [2023-11-24 21:58:59,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:58:59,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960298568] [2023-11-24 21:58:59,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:58:59,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:58:59,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:58:59,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:58:59,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:58:59,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960298568] [2023-11-24 21:58:59,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960298568] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:58:59,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:58:59,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:58:59,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086066336] [2023-11-24 21:58:59,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:58:59,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:58:59,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:58:59,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:58:59,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:58:59,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 125 [2023-11-24 21:58:59,443 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) [2023-11-24 21:58:59,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:58:59,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 125 [2023-11-24 21:58:59,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:59:01,693 INFO L124 PetriNetUnfolderBase]: 7996/16863 cut-off events. [2023-11-24 21:59:01,694 INFO L125 PetriNetUnfolderBase]: For 214/214 co-relation queries the response was YES. [2023-11-24 21:59:01,726 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. [2023-11-24 21:59:01,806 INFO L140 encePairwiseOnDemand]: 121/125 looper letters, 64 selfloop transitions, 2 changer transitions 0/114 dead transitions. [2023-11-24 21:59:01,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 114 transitions, 380 flow [2023-11-24 21:59:01,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:59:01,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:59:01,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 218 transitions. [2023-11-24 21:59:01,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813333333333334 [2023-11-24 21:59:01,809 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 218 transitions. [2023-11-24 21:59:01,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 218 transitions. [2023-11-24 21:59:01,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:59:01,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 218 transitions. [2023-11-24 21:59:01,810 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) [2023-11-24 21:59:01,811 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) [2023-11-24 21:59:01,812 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) [2023-11-24 21:59:01,812 INFO L175 Difference]: Start difference. First operand has 103 places, 99 transitions, 218 flow. Second operand 3 states and 218 transitions. [2023-11-24 21:59:01,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 114 transitions, 380 flow [2023-11-24 21:59:01,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 114 transitions, 376 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-24 21:59:01,847 INFO L231 Difference]: Finished difference. Result has 103 places, 100 transitions, 228 flow [2023-11-24 21:59:01,847 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} [2023-11-24 21:59:01,850 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, -1 predicate places. [2023-11-24 21:59:01,850 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 100 transitions, 228 flow [2023-11-24 21:59:01,851 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) [2023-11-24 21:59:01,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:59:01,851 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-11-24 21:59:01,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 21:59:01,851 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)] === [2023-11-24 21:59:01,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:01,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1135194623, now seen corresponding path program 1 times [2023-11-24 21:59:01,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:01,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422985696] [2023-11-24 21:59:01,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:01,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:01,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:01,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:01,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:01,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422985696] [2023-11-24 21:59:01,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422985696] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:59:01,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833242266] [2023-11-24 21:59:01,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:01,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:59:01,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea4df81-fc79-44e5-8c90-364b21f28c89/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:59:01,985 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea4df81-fc79-44e5-8c90-364b21f28c89/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:59:02,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea4df81-fc79-44e5-8c90-364b21f28c89/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 21:59:02,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:02,078 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-24 21:59:02,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:59:02,092 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 [2023-11-24 21:59:02,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:02,138 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:59:02,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:02,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833242266] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:59:02,193 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:59:02,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-11-24 21:59:02,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243420274] [2023-11-24 21:59:02,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:59:02,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 21:59:02,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:02,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 21:59:02,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:59:02,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 125 [2023-11-24 21:59:02,237 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) [2023-11-24 21:59:02,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:59:02,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 125 [2023-11-24 21:59:02,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:59:04,366 INFO L124 PetriNetUnfolderBase]: 7786/16097 cut-off events. [2023-11-24 21:59:04,367 INFO L125 PetriNetUnfolderBase]: For 716/716 co-relation queries the response was YES. [2023-11-24 21:59:04,403 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. [2023-11-24 21:59:04,479 INFO L140 encePairwiseOnDemand]: 121/125 looper letters, 117 selfloop transitions, 4 changer transitions 0/168 dead transitions. [2023-11-24 21:59:04,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 168 transitions, 604 flow [2023-11-24 21:59:04,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:59:04,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:59:04,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 369 transitions. [2023-11-24 21:59:04,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5904 [2023-11-24 21:59:04,482 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 369 transitions. [2023-11-24 21:59:04,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 369 transitions. [2023-11-24 21:59:04,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:59:04,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 369 transitions. [2023-11-24 21:59:04,484 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) [2023-11-24 21:59:04,486 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) [2023-11-24 21:59:04,486 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) [2023-11-24 21:59:04,486 INFO L175 Difference]: Start difference. First operand has 103 places, 100 transitions, 228 flow. Second operand 5 states and 369 transitions. [2023-11-24 21:59:04,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 168 transitions, 604 flow [2023-11-24 21:59:04,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 168 transitions, 602 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:59:04,492 INFO L231 Difference]: Finished difference. Result has 105 places, 99 transitions, 230 flow [2023-11-24 21:59:04,492 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} [2023-11-24 21:59:04,494 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 1 predicate places. [2023-11-24 21:59:04,495 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 99 transitions, 230 flow [2023-11-24 21:59:04,495 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) [2023-11-24 21:59:04,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:59:04,496 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1] [2023-11-24 21:59:04,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea4df81-fc79-44e5-8c90-364b21f28c89/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 21:59:04,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cea4df81-fc79-44e5-8c90-364b21f28c89/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-24 21:59:04,701 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)] === [2023-11-24 21:59:04,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:04,702 INFO L85 PathProgramCache]: Analyzing trace with hash -959532169, now seen corresponding path program 1 times [2023-11-24 21:59:04,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:04,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201635016] [2023-11-24 21:59:04,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:04,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:04,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 21:59:04,719 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-24 21:59:04,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 21:59:04,737 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-24 21:59:04,737 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-24 21:59:04,737 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-24 21:59:04,738 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-11-24 21:59:04,738 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-11-24 21:59:04,738 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-11-24 21:59:04,739 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-11-24 21:59:04,739 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-11-24 21:59:04,739 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-11-24 21:59:04,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 21:59:04,739 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-24 21:59:04,740 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-24 21:59:04,741 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-24 21:59:04,773 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-24 21:59:04,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 161 transitions, 349 flow [2023-11-24 21:59:04,818 INFO L124 PetriNetUnfolderBase]: 69/353 cut-off events. [2023-11-24 21:59:04,818 INFO L125 PetriNetUnfolderBase]: For 19/22 co-relation queries the response was YES. [2023-11-24 21:59:04,821 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. [2023-11-24 21:59:04,821 INFO L82 GeneralOperation]: Start removeDead. Operand has 134 places, 161 transitions, 349 flow [2023-11-24 21:59:04,825 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 134 places, 161 transitions, 349 flow [2023-11-24 21:59:04,826 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:59:04,827 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;@18b095ad, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:59:04,827 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-24 21:59:04,829 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:59:04,829 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-24 21:59:04,830 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:59:04,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:59:04,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-24 21:59:04,830 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)] === [2023-11-24 21:59:04,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:59:04,831 INFO L85 PathProgramCache]: Analyzing trace with hash 721351, now seen corresponding path program 1 times [2023-11-24 21:59:04,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:59:04,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646855968] [2023-11-24 21:59:04,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:59:04,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:59:04,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:59:04,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:59:04,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:59:04,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646855968] [2023-11-24 21:59:04,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646855968] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:59:04,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:59:04,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:59:04,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943509960] [2023-11-24 21:59:04,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:59:04,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:59:04,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:59:04,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:59:04,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:59:04,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 161 [2023-11-24 21:59:04,873 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) [2023-11-24 21:59:04,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:59:04,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 161 [2023-11-24 21:59:04,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand