./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_04-munge_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 30e01a73 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_3c02b051-a2ac-493b-a871-655a424137cf/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c02b051-a2ac-493b-a871-655a424137cf/bin/uautomizer-verify-zZY32mL2XJ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c02b051-a2ac-493b-a871-655a424137cf/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c02b051-a2ac-493b-a871-655a424137cf/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_04-munge_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c02b051-a2ac-493b-a871-655a424137cf/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c02b051-a2ac-493b-a871-655a424137cf/bin/uautomizer-verify-zZY32mL2XJ --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 50de8acec85b0b2508f1f33521d9ab6717fa1b5141d6b9e2d08fcb4af894112b --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 22:39:51,297 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 22:39:51,382 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c02b051-a2ac-493b-a871-655a424137cf/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-23 22:39:51,387 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 22:39:51,388 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 22:39:51,420 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 22:39:51,420 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 22:39:51,421 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 22:39:51,422 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 22:39:51,422 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 22:39:51,423 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 22:39:51,424 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 22:39:51,424 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 22:39:51,425 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 22:39:51,425 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 22:39:51,426 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 22:39:51,426 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 22:39:51,427 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 22:39:51,428 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-23 22:39:51,428 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-23 22:39:51,428 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-23 22:39:51,429 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 22:39:51,430 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-23 22:39:51,430 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 22:39:51,431 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 22:39:51,431 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 22:39:51,432 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 22:39:51,432 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 22:39:51,432 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 22:39:51,433 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 22:39:51,433 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:39:51,434 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 22:39:51,434 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 22:39:51,434 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 22:39:51,435 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 22:39:51,435 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 22:39:51,435 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 22:39:51,435 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 22:39:51,436 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 22:39:51,436 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_3c02b051-a2ac-493b-a871-655a424137cf/bin/uautomizer-verify-zZY32mL2XJ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c02b051-a2ac-493b-a871-655a424137cf/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 50de8acec85b0b2508f1f33521d9ab6717fa1b5141d6b9e2d08fcb4af894112b [2023-11-23 22:39:51,677 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 22:39:51,701 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 22:39:51,704 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 22:39:51,705 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 22:39:51,706 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 22:39:51,707 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c02b051-a2ac-493b-a871-655a424137cf/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/goblint-regression/28-race_reach_04-munge_racefree.i [2023-11-23 22:39:54,940 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 22:39:55,297 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 22:39:55,298 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c02b051-a2ac-493b-a871-655a424137cf/sv-benchmarks/c/goblint-regression/28-race_reach_04-munge_racefree.i [2023-11-23 22:39:55,321 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c02b051-a2ac-493b-a871-655a424137cf/bin/uautomizer-verify-zZY32mL2XJ/data/c763cc88c/cf53e8733d8848afb6973000ceb31d6f/FLAG7d4dd90fb [2023-11-23 22:39:55,340 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c02b051-a2ac-493b-a871-655a424137cf/bin/uautomizer-verify-zZY32mL2XJ/data/c763cc88c/cf53e8733d8848afb6973000ceb31d6f [2023-11-23 22:39:55,343 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 22:39:55,345 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 22:39:55,347 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 22:39:55,347 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 22:39:55,353 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 22:39:55,354 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:39:55" (1/1) ... [2023-11-23 22:39:55,355 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6376f93c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:39:55, skipping insertion in model container [2023-11-23 22:39:55,356 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:39:55" (1/1) ... [2023-11-23 22:39:55,422 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 22:39:55,818 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:39:55,835 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 22:39:55,886 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:39:55,933 INFO L206 MainTranslator]: Completed translation [2023-11-23 22:39:55,933 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:39:55 WrapperNode [2023-11-23 22:39:55,934 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 22:39:55,935 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 22:39:55,935 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 22:39:55,936 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 22:39:55,944 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:39:55" (1/1) ... [2023-11-23 22:39:55,960 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:39:55" (1/1) ... [2023-11-23 22:39:55,992 INFO L138 Inliner]: procedures = 173, calls = 42, calls flagged for inlining = 6, calls inlined = 8, statements flattened = 235 [2023-11-23 22:39:55,992 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 22:39:55,993 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 22:39:55,994 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 22:39:55,994 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 22:39:56,004 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:39:55" (1/1) ... [2023-11-23 22:39:56,004 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:39:55" (1/1) ... [2023-11-23 22:39:56,009 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:39:55" (1/1) ... [2023-11-23 22:39:56,010 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:39:55" (1/1) ... [2023-11-23 22:39:56,020 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:39:55" (1/1) ... [2023-11-23 22:39:56,025 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:39:55" (1/1) ... [2023-11-23 22:39:56,028 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:39:55" (1/1) ... [2023-11-23 22:39:56,030 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:39:55" (1/1) ... [2023-11-23 22:39:56,035 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 22:39:56,036 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 22:39:56,036 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 22:39:56,037 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 22:39:56,038 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:39:55" (1/1) ... [2023-11-23 22:39:56,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:39:56,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c02b051-a2ac-493b-a871-655a424137cf/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:39:56,070 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c02b051-a2ac-493b-a871-655a424137cf/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 22:39:56,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c02b051-a2ac-493b-a871-655a424137cf/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 22:39:56,115 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 22:39:56,116 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-11-23 22:39:56,116 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-11-23 22:39:56,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 22:39:56,116 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-23 22:39:56,117 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 22:39:56,117 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 22:39:56,117 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-11-23 22:39:56,117 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-11-23 22:39:56,118 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 22:39:56,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 22:39:56,118 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-23 22:39:56,118 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 22:39:56,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 22:39:56,120 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-23 22:39:56,284 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 22:39:56,287 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 22:39:56,707 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 22:39:57,026 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 22:39:57,026 INFO L309 CfgBuilder]: Removed 24 assume(true) statements. [2023-11-23 22:39:57,027 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:39:57 BoogieIcfgContainer [2023-11-23 22:39:57,027 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 22:39:57,030 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 22:39:57,031 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 22:39:57,034 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 22:39:57,035 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:39:55" (1/3) ... [2023-11-23 22:39:57,036 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4722bf8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:39:57, skipping insertion in model container [2023-11-23 22:39:57,036 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:39:55" (2/3) ... [2023-11-23 22:39:57,038 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4722bf8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:39:57, skipping insertion in model container [2023-11-23 22:39:57,038 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:39:57" (3/3) ... [2023-11-23 22:39:57,040 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_04-munge_racefree.i [2023-11-23 22:39:57,060 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 22:39:57,061 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2023-11-23 22:39:57,062 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-23 22:39:57,154 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-23 22:39:57,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 98 places, 123 transitions, 266 flow [2023-11-23 22:39:57,331 INFO L124 PetriNetUnfolderBase]: 47/234 cut-off events. [2023-11-23 22:39:57,332 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-23 22:39:57,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251 conditions, 234 events. 47/234 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1246 event pairs, 0 based on Foata normal form. 0/146 useless extension candidates. Maximal degree in co-relation 139. Up to 8 conditions per place. [2023-11-23 22:39:57,342 INFO L82 GeneralOperation]: Start removeDead. Operand has 98 places, 123 transitions, 266 flow [2023-11-23 22:39:57,353 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 98 places, 123 transitions, 266 flow [2023-11-23 22:39:57,363 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 22:39:57,371 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;@5a99c8e9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 22:39:57,371 INFO L358 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2023-11-23 22:39:57,375 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-23 22:39:57,375 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-23 22:39:57,375 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-23 22:39:57,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:39:57,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-23 22:39:57,377 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-23 22:39:57,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:39:57,385 INFO L85 PathProgramCache]: Analyzing trace with hash 625007, now seen corresponding path program 1 times [2023-11-23 22:39:57,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:39:57,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840688197] [2023-11-23 22:39:57,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:39:57,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:39:57,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:39:57,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:39:57,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:39:57,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840688197] [2023-11-23 22:39:57,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840688197] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:39:57,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:39:57,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 22:39:57,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599206971] [2023-11-23 22:39:57,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:39:57,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:39:57,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:39:57,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:39:57,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:39:57,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 123 [2023-11-23 22:39:57,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 123 transitions, 266 flow. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:57,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:39:57,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 123 [2023-11-23 22:39:57,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:39:59,780 INFO L124 PetriNetUnfolderBase]: 5855/11699 cut-off events. [2023-11-23 22:39:59,780 INFO L125 PetriNetUnfolderBase]: For 108/108 co-relation queries the response was YES. [2023-11-23 22:39:59,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20834 conditions, 11699 events. 5855/11699 cut-off events. For 108/108 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 97038 event pairs, 4068 based on Foata normal form. 2515/13221 useless extension candidates. Maximal degree in co-relation 19836. Up to 6749 conditions per place. [2023-11-23 22:39:59,893 INFO L140 encePairwiseOnDemand]: 95/123 looper letters, 90 selfloop transitions, 2 changer transitions 0/131 dead transitions. [2023-11-23 22:39:59,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 131 transitions, 466 flow [2023-11-23 22:39:59,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:39:59,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:39:59,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 259 transitions. [2023-11-23 22:39:59,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7018970189701897 [2023-11-23 22:39:59,911 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 259 transitions. [2023-11-23 22:39:59,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 259 transitions. [2023-11-23 22:39:59,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:39:59,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 259 transitions. [2023-11-23 22:39:59,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 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) [2023-11-23 22:39:59,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 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) [2023-11-23 22:39:59,930 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 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) [2023-11-23 22:39:59,932 INFO L175 Difference]: Start difference. First operand has 98 places, 123 transitions, 266 flow. Second operand 3 states and 259 transitions. [2023-11-23 22:39:59,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 131 transitions, 466 flow [2023-11-23 22:39:59,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 131 transitions, 466 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-23 22:39:59,952 INFO L231 Difference]: Finished difference. Result has 96 places, 95 transitions, 214 flow [2023-11-23 22:39:59,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=214, PETRI_PLACES=96, PETRI_TRANSITIONS=95} [2023-11-23 22:39:59,961 INFO L281 CegarLoopForPetriNet]: 98 programPoint places, -2 predicate places. [2023-11-23 22:39:59,962 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 95 transitions, 214 flow [2023-11-23 22:39:59,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:39:59,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:39:59,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-23 22:39:59,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 22:39:59,964 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-23 22:39:59,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:39:59,966 INFO L85 PathProgramCache]: Analyzing trace with hash 625008, now seen corresponding path program 1 times [2023-11-23 22:39:59,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:39:59,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067969290] [2023-11-23 22:39:59,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:39:59,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:40:00,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:40:00,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:40:00,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:40:00,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067969290] [2023-11-23 22:40:00,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067969290] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:40:00,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:40:00,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 22:40:00,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163256048] [2023-11-23 22:40:00,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:40:00,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:40:00,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:40:00,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:40:00,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:40:00,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 123 [2023-11-23 22:40:00,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 95 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:00,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:40:00,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 123 [2023-11-23 22:40:00,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:40:01,707 INFO L124 PetriNetUnfolderBase]: 4948/10321 cut-off events. [2023-11-23 22:40:01,708 INFO L125 PetriNetUnfolderBase]: For 507/507 co-relation queries the response was YES. [2023-11-23 22:40:01,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18536 conditions, 10321 events. 4948/10321 cut-off events. For 507/507 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 86223 event pairs, 2160 based on Foata normal form. 1/9280 useless extension candidates. Maximal degree in co-relation 17754. Up to 7669 conditions per place. [2023-11-23 22:40:01,861 INFO L140 encePairwiseOnDemand]: 119/123 looper letters, 72 selfloop transitions, 2 changer transitions 0/114 dead transitions. [2023-11-23 22:40:01,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 114 transitions, 400 flow [2023-11-23 22:40:01,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:40:01,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:40:01,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 202 transitions. [2023-11-23 22:40:01,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5474254742547425 [2023-11-23 22:40:01,864 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 202 transitions. [2023-11-23 22:40:01,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 202 transitions. [2023-11-23 22:40:01,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:40:01,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 202 transitions. [2023-11-23 22:40:01,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 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) [2023-11-23 22:40:01,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 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) [2023-11-23 22:40:01,868 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 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) [2023-11-23 22:40:01,868 INFO L175 Difference]: Start difference. First operand has 96 places, 95 transitions, 214 flow. Second operand 3 states and 202 transitions. [2023-11-23 22:40:01,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 114 transitions, 400 flow [2023-11-23 22:40:01,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 114 transitions, 396 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-23 22:40:01,890 INFO L231 Difference]: Finished difference. Result has 97 places, 95 transitions, 220 flow [2023-11-23 22:40:01,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=97, PETRI_TRANSITIONS=95} [2023-11-23 22:40:01,891 INFO L281 CegarLoopForPetriNet]: 98 programPoint places, -1 predicate places. [2023-11-23 22:40:01,891 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 95 transitions, 220 flow [2023-11-23 22:40:01,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:01,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:40:01,892 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-11-23 22:40:01,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 22:40:01,892 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-23 22:40:01,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:40:01,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1704063529, now seen corresponding path program 1 times [2023-11-23 22:40:01,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:40:01,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312874794] [2023-11-23 22:40:01,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:40:01,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:40:01,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:40:02,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:40:02,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:40:02,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312874794] [2023-11-23 22:40:02,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312874794] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:40:02,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129997064] [2023-11-23 22:40:02,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:40:02,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:40:02,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c02b051-a2ac-493b-a871-655a424137cf/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:40:02,087 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c02b051-a2ac-493b-a871-655a424137cf/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:40:02,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c02b051-a2ac-493b-a871-655a424137cf/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 22:40:02,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:40:02,207 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 22:40:02,212 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:40:02,278 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 [2023-11-23 22:40:02,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:40:02,365 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:40:02,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:40:02,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129997064] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:40:02,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:40:02,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2023-11-23 22:40:02,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476718806] [2023-11-23 22:40:02,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:40:02,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 22:40:02,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:40:02,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 22:40:02,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-23 22:40:02,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 123 [2023-11-23 22:40:02,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 95 transitions, 220 flow. Second operand has 9 states, 9 states have (on average 43.333333333333336) internal successors, (390), 9 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:02,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:40:02,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 123 [2023-11-23 22:40:02,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:40:02,800 INFO L124 PetriNetUnfolderBase]: 55/165 cut-off events. [2023-11-23 22:40:02,800 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2023-11-23 22:40:02,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 345 conditions, 165 events. 55/165 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 672 event pairs, 0 based on Foata normal form. 38/196 useless extension candidates. Maximal degree in co-relation 339. Up to 111 conditions per place. [2023-11-23 22:40:02,802 INFO L140 encePairwiseOnDemand]: 119/123 looper letters, 41 selfloop transitions, 2 changer transitions 0/57 dead transitions. [2023-11-23 22:40:02,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 57 transitions, 210 flow [2023-11-23 22:40:02,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 22:40:02,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 22:40:02,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 209 transitions. [2023-11-23 22:40:02,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4247967479674797 [2023-11-23 22:40:02,805 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 209 transitions. [2023-11-23 22:40:02,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 209 transitions. [2023-11-23 22:40:02,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:40:02,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 209 transitions. [2023-11-23 22:40:02,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 52.25) internal successors, (209), 4 states have internal predecessors, (209), 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) [2023-11-23 22:40:02,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 123.0) internal successors, (615), 5 states have internal predecessors, (615), 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) [2023-11-23 22:40:02,810 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 123.0) internal successors, (615), 5 states have internal predecessors, (615), 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) [2023-11-23 22:40:02,811 INFO L175 Difference]: Start difference. First operand has 97 places, 95 transitions, 220 flow. Second operand 4 states and 209 transitions. [2023-11-23 22:40:02,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 57 transitions, 210 flow [2023-11-23 22:40:02,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 57 transitions, 204 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-23 22:40:02,814 INFO L231 Difference]: Finished difference. Result has 43 places, 37 transitions, 82 flow [2023-11-23 22:40:02,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=82, PETRI_PLACES=43, PETRI_TRANSITIONS=37} [2023-11-23 22:40:02,815 INFO L281 CegarLoopForPetriNet]: 98 programPoint places, -55 predicate places. [2023-11-23 22:40:02,815 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 37 transitions, 82 flow [2023-11-23 22:40:02,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 43.333333333333336) internal successors, (390), 9 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:02,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:40:02,816 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2023-11-23 22:40:02,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c02b051-a2ac-493b-a871-655a424137cf/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 22:40:03,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c02b051-a2ac-493b-a871-655a424137cf/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:40:03,031 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-23 22:40:03,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:40:03,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1286362553, now seen corresponding path program 1 times [2023-11-23 22:40:03,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:40:03,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787491299] [2023-11-23 22:40:03,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:40:03,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:40:03,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 22:40:03,066 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-23 22:40:03,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 22:40:03,117 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-23 22:40:03,118 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-23 22:40:03,119 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (14 of 15 remaining) [2023-11-23 22:40:03,121 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONMEMORY_LEAK (13 of 15 remaining) [2023-11-23 22:40:03,121 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 15 remaining) [2023-11-23 22:40:03,122 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 15 remaining) [2023-11-23 22:40:03,122 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 15 remaining) [2023-11-23 22:40:03,122 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 15 remaining) [2023-11-23 22:40:03,122 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 15 remaining) [2023-11-23 22:40:03,123 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 15 remaining) [2023-11-23 22:40:03,123 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 15 remaining) [2023-11-23 22:40:03,123 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 15 remaining) [2023-11-23 22:40:03,123 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (4 of 15 remaining) [2023-11-23 22:40:03,124 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 15 remaining) [2023-11-23 22:40:03,124 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr0ASSERT_VIOLATIONMEMORY_LEAK (2 of 15 remaining) [2023-11-23 22:40:03,124 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONMEMORY_LEAK (1 of 15 remaining) [2023-11-23 22:40:03,124 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 15 remaining) [2023-11-23 22:40:03,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 22:40:03,125 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-23 22:40:03,128 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-23 22:40:03,128 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-23 22:40:03,206 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-11-23 22:40:03,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 217 transitions, 478 flow [2023-11-23 22:40:03,348 INFO L124 PetriNetUnfolderBase]: 161/719 cut-off events. [2023-11-23 22:40:03,348 INFO L125 PetriNetUnfolderBase]: For 72/79 co-relation queries the response was YES. [2023-11-23 22:40:03,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 808 conditions, 719 events. 161/719 cut-off events. For 72/79 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 4876 event pairs, 2 based on Foata normal form. 0/459 useless extension candidates. Maximal degree in co-relation 445. Up to 32 conditions per place. [2023-11-23 22:40:03,361 INFO L82 GeneralOperation]: Start removeDead. Operand has 166 places, 217 transitions, 478 flow [2023-11-23 22:40:03,434 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 166 places, 217 transitions, 478 flow [2023-11-23 22:40:03,435 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 22:40:03,438 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;@5a99c8e9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 22:40:03,439 INFO L358 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2023-11-23 22:40:03,442 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-23 22:40:03,442 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-23 22:40:03,442 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-23 22:40:03,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:40:03,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-23 22:40:03,443 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-23 22:40:03,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:40:03,443 INFO L85 PathProgramCache]: Analyzing trace with hash 838502, now seen corresponding path program 1 times [2023-11-23 22:40:03,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:40:03,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858018992] [2023-11-23 22:40:03,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:40:03,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:40:03,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:40:03,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:40:03,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:40:03,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858018992] [2023-11-23 22:40:03,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858018992] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:40:03,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:40:03,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 22:40:03,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423068637] [2023-11-23 22:40:03,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:40:03,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:40:03,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:40:03,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:40:03,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:40:03,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 217 [2023-11-23 22:40:03,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 217 transitions, 478 flow. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:40:03,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:40:03,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 217 [2023-11-23 22:40:03,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand