./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_82-list_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a340643f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_82-list_racefree.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6ac894f5c6207d1329786eb676509b79ca36f8c33f880cc59ffa30652ab92765 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 16:18:34,586 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 16:18:34,658 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 16:18:34,661 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 16:18:34,661 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 16:18:34,676 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 16:18:34,676 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 16:18:34,676 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 16:18:34,677 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 16:18:34,677 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 16:18:34,677 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 16:18:34,678 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 16:18:34,678 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 16:18:34,678 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 16:18:34,678 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 16:18:34,679 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 16:18:34,679 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 16:18:34,679 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 16:18:34,679 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 16:18:34,679 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 16:18:34,680 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 16:18:34,680 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 16:18:34,680 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 16:18:34,681 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 16:18:34,681 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 16:18:34,681 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 16:18:34,681 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 16:18:34,681 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 16:18:34,682 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 16:18:34,682 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 16:18:34,682 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 16:18:34,682 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 16:18:34,683 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 16:18:34,683 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 16:18:34,683 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 16:18:34,683 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 16:18:34,683 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 16:18:34,683 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 16:18:34,684 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 16:18:34,684 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 16:18:34,684 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 16:18:34,684 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 16:18:34,684 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 16:18:34,685 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6ac894f5c6207d1329786eb676509b79ca36f8c33f880cc59ffa30652ab92765 [2024-01-27 16:18:34,856 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 16:18:34,871 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 16:18:34,873 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 16:18:34,874 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 16:18:34,874 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 16:18:34,875 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_82-list_racefree.i [2024-01-27 16:18:36,002 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 16:18:36,268 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 16:18:36,268 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_82-list_racefree.i [2024-01-27 16:18:36,283 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1eb221891/6ee8e842b6b8479d966f970cd72d1dfb/FLAGef350fc71 [2024-01-27 16:18:36,295 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1eb221891/6ee8e842b6b8479d966f970cd72d1dfb [2024-01-27 16:18:36,298 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 16:18:36,299 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 16:18:36,300 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 16:18:36,300 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 16:18:36,304 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 16:18:36,305 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 04:18:36" (1/1) ... [2024-01-27 16:18:36,307 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56091e01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:18:36, skipping insertion in model container [2024-01-27 16:18:36,307 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 04:18:36" (1/1) ... [2024-01-27 16:18:36,339 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 16:18:36,672 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_82-list_racefree.i[47038,47051] [2024-01-27 16:18:36,718 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 16:18:36,740 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 16:18:36,779 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_82-list_racefree.i[47038,47051] [2024-01-27 16:18:36,797 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 16:18:36,848 INFO L206 MainTranslator]: Completed translation [2024-01-27 16:18:36,849 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:18:36 WrapperNode [2024-01-27 16:18:36,849 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 16:18:36,850 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 16:18:36,850 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 16:18:36,850 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 16:18:36,863 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:18:36" (1/1) ... [2024-01-27 16:18:36,876 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:18:36" (1/1) ... [2024-01-27 16:18:36,906 INFO L138 Inliner]: procedures = 279, calls = 67, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 222 [2024-01-27 16:18:36,909 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 16:18:36,910 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 16:18:36,910 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 16:18:36,910 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 16:18:36,919 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:18:36" (1/1) ... [2024-01-27 16:18:36,919 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:18:36" (1/1) ... [2024-01-27 16:18:36,939 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:18:36" (1/1) ... [2024-01-27 16:18:36,968 INFO L175 MemorySlicer]: Split 35 memory accesses to 7 slices as follows [2, 2, 14, 5, 5, 5, 2]. 40 percent of accesses are in the largest equivalence class. The 17 initializations are split as follows [2, 0, 0, 5, 5, 5, 0]. The 10 writes are split as follows [0, 1, 8, 0, 0, 0, 1]. [2024-01-27 16:18:36,969 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:18:36" (1/1) ... [2024-01-27 16:18:36,969 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:18:36" (1/1) ... [2024-01-27 16:18:36,985 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:18:36" (1/1) ... [2024-01-27 16:18:36,989 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:18:36" (1/1) ... [2024-01-27 16:18:36,992 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:18:36" (1/1) ... [2024-01-27 16:18:36,996 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:18:36" (1/1) ... [2024-01-27 16:18:37,000 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 16:18:37,002 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 16:18:37,002 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 16:18:37,002 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 16:18:37,003 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:18:36" (1/1) ... [2024-01-27 16:18:37,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 16:18:37,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 16:18:37,036 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-01-27 16:18:37,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-01-27 16:18:37,085 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 16:18:37,085 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-01-27 16:18:37,085 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-01-27 16:18:37,085 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-01-27 16:18:37,086 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2024-01-27 16:18:37,086 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2024-01-27 16:18:37,086 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#5 [2024-01-27 16:18:37,086 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#6 [2024-01-27 16:18:37,087 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2024-01-27 16:18:37,087 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2024-01-27 16:18:37,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 16:18:37,087 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-01-27 16:18:37,088 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 16:18:37,088 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 16:18:37,088 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 16:18:37,088 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-27 16:18:37,088 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-01-27 16:18:37,088 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-01-27 16:18:37,089 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-01-27 16:18:37,089 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2024-01-27 16:18:37,089 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2024-01-27 16:18:37,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 16:18:37,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 16:18:37,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 16:18:37,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-27 16:18:37,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-01-27 16:18:37,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-01-27 16:18:37,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-01-27 16:18:37,092 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-01-27 16:18:37,092 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-01-27 16:18:37,092 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 16:18:37,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-01-27 16:18:37,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-01-27 16:18:37,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-01-27 16:18:37,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2024-01-27 16:18:37,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2024-01-27 16:18:37,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#5 [2024-01-27 16:18:37,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#6 [2024-01-27 16:18:37,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 16:18:37,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 16:18:37,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 16:18:37,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-27 16:18:37,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-01-27 16:18:37,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-01-27 16:18:37,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-01-27 16:18:37,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 16:18:37,095 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 16:18:37,097 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-27 16:18:37,255 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 16:18:37,257 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 16:18:37,557 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 16:18:37,557 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 16:18:37,736 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 16:18:37,736 INFO L320 CfgBuilder]: Removed 15 assume(true) statements. [2024-01-27 16:18:37,737 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 04:18:37 BoogieIcfgContainer [2024-01-27 16:18:37,737 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 16:18:37,739 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 16:18:37,739 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 16:18:37,742 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 16:18:37,742 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 04:18:36" (1/3) ... [2024-01-27 16:18:37,743 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67bc1d84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 04:18:37, skipping insertion in model container [2024-01-27 16:18:37,743 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 04:18:36" (2/3) ... [2024-01-27 16:18:37,743 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67bc1d84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 04:18:37, skipping insertion in model container [2024-01-27 16:18:37,743 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 04:18:37" (3/3) ... [2024-01-27 16:18:37,744 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_82-list_racefree.i [2024-01-27 16:18:37,750 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 16:18:37,757 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 16:18:37,757 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 16:18:37,757 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 16:18:37,820 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-01-27 16:18:37,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 75 transitions, 170 flow [2024-01-27 16:18:37,910 INFO L124 PetriNetUnfolderBase]: 36/155 cut-off events. [2024-01-27 16:18:37,911 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-01-27 16:18:37,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 155 events. 36/155 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 591 event pairs, 0 based on Foata normal form. 0/111 useless extension candidates. Maximal degree in co-relation 80. Up to 8 conditions per place. [2024-01-27 16:18:37,915 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 75 transitions, 170 flow [2024-01-27 16:18:37,918 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 62 places, 73 transitions, 160 flow [2024-01-27 16:18:37,924 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 16:18:37,930 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@509bd637, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 16:18:37,930 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-01-27 16:18:37,939 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 16:18:37,940 INFO L124 PetriNetUnfolderBase]: 0/19 cut-off events. [2024-01-27 16:18:37,940 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-27 16:18:37,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:18:37,940 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-01-27 16:18:37,941 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-27 16:18:37,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:18:37,946 INFO L85 PathProgramCache]: Analyzing trace with hash -242343553, now seen corresponding path program 1 times [2024-01-27 16:18:37,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:18:37,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620446456] [2024-01-27 16:18:37,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:18:37,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:18:38,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 16:18:38,222 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-27 16:18:38,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 16:18:38,338 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-27 16:18:38,340 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-27 16:18:38,356 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-01-27 16:18:38,358 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2024-01-27 16:18:38,359 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-01-27 16:18:38,359 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-01-27 16:18:38,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 16:18:38,360 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2024-01-27 16:18:38,364 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-27 16:18:38,364 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-01-27 16:18:38,424 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2024-01-27 16:18:38,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 135 transitions, 314 flow [2024-01-27 16:18:38,510 INFO L124 PetriNetUnfolderBase]: 141/507 cut-off events. [2024-01-27 16:18:38,511 INFO L125 PetriNetUnfolderBase]: For 72/86 co-relation queries the response was YES. [2024-01-27 16:18:38,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 596 conditions, 507 events. 141/507 cut-off events. For 72/86 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2866 event pairs, 1 based on Foata normal form. 0/365 useless extension candidates. Maximal degree in co-relation 338. Up to 32 conditions per place. [2024-01-27 16:18:38,519 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 135 transitions, 314 flow [2024-01-27 16:18:38,526 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 108 places, 135 transitions, 314 flow [2024-01-27 16:18:38,528 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 16:18:38,529 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@509bd637, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 16:18:38,529 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-01-27 16:18:38,537 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 16:18:38,538 INFO L124 PetriNetUnfolderBase]: 2/52 cut-off events. [2024-01-27 16:18:38,538 INFO L125 PetriNetUnfolderBase]: For 5/6 co-relation queries the response was YES. [2024-01-27 16:18:38,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:18:38,538 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2024-01-27 16:18:38,538 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 16:18:38,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:18:38,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1723195000, now seen corresponding path program 1 times [2024-01-27 16:18:38,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:18:38,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507181657] [2024-01-27 16:18:38,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:18:38,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:18:38,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 16:18:38,600 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-27 16:18:38,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 16:18:38,640 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-27 16:18:38,640 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-27 16:18:38,641 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-01-27 16:18:38,641 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2024-01-27 16:18:38,641 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2024-01-27 16:18:38,642 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-01-27 16:18:38,642 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-01-27 16:18:38,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 16:18:38,642 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2024-01-27 16:18:38,646 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-27 16:18:38,646 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-01-27 16:18:38,716 INFO L144 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2024-01-27 16:18:38,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 195 transitions, 462 flow [2024-01-27 16:18:38,977 INFO L124 PetriNetUnfolderBase]: 504/1445 cut-off events. [2024-01-27 16:18:38,977 INFO L125 PetriNetUnfolderBase]: For 419/485 co-relation queries the response was YES. [2024-01-27 16:18:38,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1881 conditions, 1445 events. 504/1445 cut-off events. For 419/485 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 9844 event pairs, 32 based on Foata normal form. 0/1093 useless extension candidates. Maximal degree in co-relation 1052. Up to 192 conditions per place. [2024-01-27 16:18:38,997 INFO L82 GeneralOperation]: Start removeDead. Operand has 154 places, 195 transitions, 462 flow [2024-01-27 16:18:39,021 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 154 places, 195 transitions, 462 flow [2024-01-27 16:18:39,025 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 16:18:39,031 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@509bd637, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 16:18:39,031 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-01-27 16:18:39,044 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 16:18:39,045 INFO L124 PetriNetUnfolderBase]: 6/103 cut-off events. [2024-01-27 16:18:39,045 INFO L125 PetriNetUnfolderBase]: For 20/23 co-relation queries the response was YES. [2024-01-27 16:18:39,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:18:39,046 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2024-01-27 16:18:39,046 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-01-27 16:18:39,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:18:39,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1327748962, now seen corresponding path program 1 times [2024-01-27 16:18:39,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:18:39,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756303860] [2024-01-27 16:18:39,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:18:39,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:18:39,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 16:18:39,081 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-27 16:18:39,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 16:18:39,110 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-27 16:18:39,112 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-27 16:18:39,112 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2024-01-27 16:18:39,112 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2024-01-27 16:18:39,112 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2024-01-27 16:18:39,113 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2024-01-27 16:18:39,113 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2024-01-27 16:18:39,113 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2024-01-27 16:18:39,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-27 16:18:39,113 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2024-01-27 16:18:39,114 WARN L234 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-27 16:18:39,114 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-01-27 16:18:39,203 INFO L144 ThreadInstanceAdder]: Constructed 16 joinOtherThreadTransitions. [2024-01-27 16:18:39,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 200 places, 255 transitions, 614 flow [2024-01-27 16:18:40,051 INFO L124 PetriNetUnfolderBase]: 2097/4697 cut-off events. [2024-01-27 16:18:40,051 INFO L125 PetriNetUnfolderBase]: For 2144/2347 co-relation queries the response was YES. [2024-01-27 16:18:40,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6838 conditions, 4697 events. 2097/4697 cut-off events. For 2144/2347 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 34436 event pairs, 453 based on Foata normal form. 0/3793 useless extension candidates. Maximal degree in co-relation 3517. Up to 1024 conditions per place. [2024-01-27 16:18:40,116 INFO L82 GeneralOperation]: Start removeDead. Operand has 200 places, 255 transitions, 614 flow [2024-01-27 16:18:40,177 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 200 places, 255 transitions, 614 flow [2024-01-27 16:18:40,178 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 16:18:40,181 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@509bd637, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 16:18:40,181 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-01-27 16:18:40,197 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 16:18:40,197 INFO L124 PetriNetUnfolderBase]: 15/183 cut-off events. [2024-01-27 16:18:40,197 INFO L125 PetriNetUnfolderBase]: For 51/54 co-relation queries the response was YES. [2024-01-27 16:18:40,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:18:40,198 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2024-01-27 16:18:40,198 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-01-27 16:18:40,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:18:40,198 INFO L85 PathProgramCache]: Analyzing trace with hash -2055913199, now seen corresponding path program 1 times [2024-01-27 16:18:40,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:18:40,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763462005] [2024-01-27 16:18:40,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:18:40,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:18:40,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 16:18:40,256 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-27 16:18:40,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 16:18:40,279 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-27 16:18:40,279 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-27 16:18:40,279 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2024-01-27 16:18:40,279 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2024-01-27 16:18:40,280 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 7 remaining) [2024-01-27 16:18:40,280 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2024-01-27 16:18:40,280 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2024-01-27 16:18:40,280 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2024-01-27 16:18:40,280 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2024-01-27 16:18:40,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-27 16:18:40,281 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2024-01-27 16:18:40,281 WARN L234 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-27 16:18:40,281 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2024-01-27 16:18:40,500 INFO L144 ThreadInstanceAdder]: Constructed 20 joinOtherThreadTransitions. [2024-01-27 16:18:40,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 246 places, 315 transitions, 770 flow [2024-01-27 16:18:45,066 INFO L124 PetriNetUnfolderBase]: 9672/18039 cut-off events. [2024-01-27 16:18:45,067 INFO L125 PetriNetUnfolderBase]: For 10450/10806 co-relation queries the response was YES. [2024-01-27 16:18:45,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28430 conditions, 18039 events. 9672/18039 cut-off events. For 10450/10806 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 140369 event pairs, 2148 based on Foata normal form. 0/15393 useless extension candidates. Maximal degree in co-relation 13784. Up to 5120 conditions per place. [2024-01-27 16:18:45,388 INFO L82 GeneralOperation]: Start removeDead. Operand has 246 places, 315 transitions, 770 flow [2024-01-27 16:18:45,937 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 246 places, 315 transitions, 770 flow [2024-01-27 16:18:45,938 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 16:18:45,939 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@509bd637, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 16:18:45,940 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-01-27 16:18:45,986 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 16:18:45,986 INFO L124 PetriNetUnfolderBase]: 38/318 cut-off events. [2024-01-27 16:18:45,986 INFO L125 PetriNetUnfolderBase]: For 114/140 co-relation queries the response was YES. [2024-01-27 16:18:45,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:18:45,987 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:18:45,987 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-01-27 16:18:45,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:18:46,000 INFO L85 PathProgramCache]: Analyzing trace with hash -492015811, now seen corresponding path program 1 times [2024-01-27 16:18:46,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:18:46,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241459499] [2024-01-27 16:18:46,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:18:46,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:18:46,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 16:18:46,052 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-01-27 16:18:46,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-01-27 16:18:46,090 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-01-27 16:18:46,090 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-01-27 16:18:46,091 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2024-01-27 16:18:46,091 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (6 of 8 remaining) [2024-01-27 16:18:46,091 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 8 remaining) [2024-01-27 16:18:46,091 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 8 remaining) [2024-01-27 16:18:46,093 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 8 remaining) [2024-01-27 16:18:46,093 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2024-01-27 16:18:46,093 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2024-01-27 16:18:46,095 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2024-01-27 16:18:46,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-27 16:18:46,095 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2024-01-27 16:18:46,096 WARN L234 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2024-01-27 16:18:46,096 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2024-01-27 16:18:46,206 INFO L144 ThreadInstanceAdder]: Constructed 24 joinOtherThreadTransitions. [2024-01-27 16:18:46,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 292 places, 375 transitions, 930 flow [2024-01-27 16:19:05,990 INFO L124 PetriNetUnfolderBase]: 45693/76031 cut-off events. [2024-01-27 16:19:05,990 INFO L125 PetriNetUnfolderBase]: For 49552/50174 co-relation queries the response was YES. [2024-01-27 16:19:08,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125412 conditions, 76031 events. 45693/76031 cut-off events. For 49552/50174 co-relation queries the response was YES. Maximal size of possible extension queue 2105. Compared 636615 event pairs, 12465 based on Foata normal form. 0/66973 useless extension candidates. Maximal degree in co-relation 59504. Up to 24576 conditions per place. [2024-01-27 16:19:08,544 INFO L82 GeneralOperation]: Start removeDead. Operand has 292 places, 375 transitions, 930 flow [2024-01-27 16:19:11,218 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 292 places, 375 transitions, 930 flow [2024-01-27 16:19:11,219 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 16:19:11,219 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@509bd637, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 16:19:11,219 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-01-27 16:19:11,246 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 16:19:11,247 INFO L124 PetriNetUnfolderBase]: 42/348 cut-off events. [2024-01-27 16:19:11,247 INFO L125 PetriNetUnfolderBase]: For 145/188 co-relation queries the response was YES. [2024-01-27 16:19:11,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 16:19:11,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 16:19:11,247 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-01-27 16:19:11,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 16:19:11,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1112263357, now seen corresponding path program 1 times [2024-01-27 16:19:11,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 16:19:11,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041540403] [2024-01-27 16:19:11,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 16:19:11,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 16:19:11,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 16:19:11,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 16:19:11,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 16:19:11,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041540403] [2024-01-27 16:19:11,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041540403] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 16:19:11,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 16:19:11,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 16:19:11,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520421876] [2024-01-27 16:19:11,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 16:19:11,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 16:19:11,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 16:19:11,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 16:19:11,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 16:19:11,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 375 [2024-01-27 16:19:11,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 375 transitions, 930 flow. Second operand has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 16:19:11,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 16:19:11,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 375 [2024-01-27 16:19:11,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand