./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/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 cb010ae024b402436affeb854f96a5f9e0df3d8ec2cfe8b3a7f33676b7169a2c --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 14:22:41,619 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 14:22:41,695 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-11 14:22:41,702 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 14:22:41,703 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 14:22:41,733 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 14:22:41,734 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 14:22:41,734 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 14:22:41,735 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 14:22:41,735 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 14:22:41,736 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 14:22:41,736 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 14:22:41,737 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 14:22:41,738 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 14:22:41,738 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 14:22:41,738 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 14:22:41,739 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-11 14:22:41,739 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 14:22:41,739 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 14:22:41,739 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 14:22:41,740 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 14:22:41,744 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-11 14:22:41,744 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 14:22:41,744 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-11 14:22:41,747 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 14:22:41,747 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 14:22:41,748 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-11 14:22:41,748 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 14:22:41,748 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 14:22:41,749 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 14:22:41,749 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 14:22:41,750 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 14:22:41,750 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:22:41,750 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 14:22:41,750 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 14:22:41,751 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-11 14:22:41,751 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 14:22:41,751 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 14:22:41,751 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 14:22:41,751 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 14:22:41,751 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 14:22:41,752 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 14:22:41,752 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-clean/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb010ae024b402436affeb854f96a5f9e0df3d8ec2cfe8b3a7f33676b7169a2c [2024-10-11 14:22:41,982 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 14:22:42,007 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 14:22:42,010 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 14:22:42,012 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 14:22:42,012 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 14:22:42,014 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i [2024-10-11 14:22:43,503 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 14:22:43,750 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 14:22:43,751 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i [2024-10-11 14:22:43,775 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/09a214d11/f2b5a7c707e446809780ecc70829de05/FLAGc76c1051c [2024-10-11 14:22:43,790 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/09a214d11/f2b5a7c707e446809780ecc70829de05 [2024-10-11 14:22:43,793 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 14:22:43,794 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 14:22:43,796 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 14:22:43,796 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 14:22:43,801 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 14:22:43,802 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:22:43" (1/1) ... [2024-10-11 14:22:43,805 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a42f223 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:43, skipping insertion in model container [2024-10-11 14:22:43,805 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:22:43" (1/1) ... [2024-10-11 14:22:43,848 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 14:22:44,205 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i[30176,30189] [2024-10-11 14:22:44,227 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:22:44,242 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 14:22:44,277 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i[30176,30189] [2024-10-11 14:22:44,287 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:22:44,325 INFO L204 MainTranslator]: Completed translation [2024-10-11 14:22:44,326 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:44 WrapperNode [2024-10-11 14:22:44,326 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 14:22:44,327 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 14:22:44,327 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 14:22:44,328 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 14:22:44,334 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:44" (1/1) ... [2024-10-11 14:22:44,350 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:44" (1/1) ... [2024-10-11 14:22:44,374 INFO L138 Inliner]: procedures = 170, calls = 35, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 62 [2024-10-11 14:22:44,375 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 14:22:44,376 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 14:22:44,376 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 14:22:44,376 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 14:22:44,386 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:44" (1/1) ... [2024-10-11 14:22:44,387 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:44" (1/1) ... [2024-10-11 14:22:44,392 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:44" (1/1) ... [2024-10-11 14:22:44,425 INFO L175 MemorySlicer]: Split 18 memory accesses to 4 slices as follows [2, 5, 6, 5]. 33 percent of accesses are in the largest equivalence class. The 13 initializations are split as follows [2, 5, 1, 5]. The 2 writes are split as follows [0, 0, 2, 0]. [2024-10-11 14:22:44,425 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:44" (1/1) ... [2024-10-11 14:22:44,426 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:44" (1/1) ... [2024-10-11 14:22:44,434 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:44" (1/1) ... [2024-10-11 14:22:44,437 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:44" (1/1) ... [2024-10-11 14:22:44,439 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:44" (1/1) ... [2024-10-11 14:22:44,440 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:44" (1/1) ... [2024-10-11 14:22:44,443 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 14:22:44,444 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 14:22:44,444 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 14:22:44,444 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 14:22:44,445 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:44" (1/1) ... [2024-10-11 14:22:44,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:22:44,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:22:44,485 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 14:22:44,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 14:22:44,536 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-11 14:22:44,536 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-11 14:22:44,536 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-11 14:22:44,536 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-11 14:22:44,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-11 14:22:44,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-11 14:22:44,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-11 14:22:44,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-11 14:22:44,537 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-11 14:22:44,537 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 14:22:44,538 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-10-11 14:22:44,538 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-10-11 14:22:44,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 14:22:44,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-11 14:22:44,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-11 14:22:44,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-11 14:22:44,538 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-11 14:22:44,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 14:22:44,539 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 14:22:44,540 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-11 14:22:44,662 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 14:22:44,664 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 14:22:44,825 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-11 14:22:44,825 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 14:22:44,994 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 14:22:44,995 INFO L314 CfgBuilder]: Removed 9 assume(true) statements. [2024-10-11 14:22:44,995 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:22:44 BoogieIcfgContainer [2024-10-11 14:22:44,995 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 14:22:44,997 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 14:22:44,998 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 14:22:45,001 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 14:22:45,003 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:22:43" (1/3) ... [2024-10-11 14:22:45,004 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19effc1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:22:45, skipping insertion in model container [2024-10-11 14:22:45,004 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:44" (2/3) ... [2024-10-11 14:22:45,005 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19effc1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:22:45, skipping insertion in model container [2024-10-11 14:22:45,005 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:22:44" (3/3) ... [2024-10-11 14:22:45,007 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_21-deref_read_racing.i [2024-10-11 14:22:45,026 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 14:22:45,026 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-11 14:22:45,026 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-11 14:22:45,062 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-11 14:22:45,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 36 places, 42 transitions, 88 flow [2024-10-11 14:22:45,158 INFO L124 PetriNetUnfolderBase]: 12/57 cut-off events. [2024-10-11 14:22:45,159 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 14:22:45,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 57 events. 12/57 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 160 event pairs, 0 based on Foata normal form. 0/41 useless extension candidates. Maximal degree in co-relation 39. Up to 4 conditions per place. [2024-10-11 14:22:45,164 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 42 transitions, 88 flow [2024-10-11 14:22:45,170 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 42 transitions, 88 flow [2024-10-11 14:22:45,189 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 14:22:45,222 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=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;@47e7d2d3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 14:22:45,223 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-10-11 14:22:45,233 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 14:22:45,233 INFO L124 PetriNetUnfolderBase]: 1/16 cut-off events. [2024-10-11 14:22:45,233 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 14:22:45,234 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:22:45,234 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-10-11 14:22:45,235 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:22:45,240 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:22:45,240 INFO L85 PathProgramCache]: Analyzing trace with hash 188982645, now seen corresponding path program 1 times [2024-10-11 14:22:45,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:22:45,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993443183] [2024-10-11 14:22:45,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:22:45,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:22:45,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 14:22:45,392 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-11 14:22:45,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 14:22:45,457 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-11 14:22:45,460 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-11 14:22:45,461 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2024-10-11 14:22:45,463 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-10-11 14:22:45,463 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 14:22:45,464 INFO L407 BasicCegarLoop]: Path program histogram: [1] [2024-10-11 14:22:45,468 WARN L239 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-11 14:22:45,471 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-10-11 14:22:45,493 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-11 14:22:45,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 66 transitions, 142 flow [2024-10-11 14:22:45,530 INFO L124 PetriNetUnfolderBase]: 21/97 cut-off events. [2024-10-11 14:22:45,531 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-11 14:22:45,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 97 events. 21/97 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 331 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 62. Up to 6 conditions per place. [2024-10-11 14:22:45,534 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 66 transitions, 142 flow [2024-10-11 14:22:45,536 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 66 transitions, 142 flow [2024-10-11 14:22:45,538 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 14:22:45,540 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=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;@47e7d2d3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 14:22:45,541 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-10-11 14:22:45,547 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 14:22:45,549 INFO L124 PetriNetUnfolderBase]: 1/20 cut-off events. [2024-10-11 14:22:45,549 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-11 14:22:45,550 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:22:45,550 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-11 14:22:45,551 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:22:45,552 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:22:45,552 INFO L85 PathProgramCache]: Analyzing trace with hash 2141085446, now seen corresponding path program 1 times [2024-10-11 14:22:45,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:22:45,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665050879] [2024-10-11 14:22:45,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:22:45,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:22:45,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:22:45,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:22:45,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:22:45,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665050879] [2024-10-11 14:22:45,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665050879] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:22:45,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:22:45,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 14:22:45,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576507997] [2024-10-11 14:22:45,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:22:45,718 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:22:45,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:22:45,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:22:45,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:22:45,756 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 66 [2024-10-11 14:22:45,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 66 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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) [2024-10-11 14:22:45,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:22:45,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 66 [2024-10-11 14:22:45,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:22:46,331 INFO L124 PetriNetUnfolderBase]: 1602/3295 cut-off events. [2024-10-11 14:22:46,332 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-10-11 14:22:46,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5925 conditions, 3295 events. 1602/3295 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 22865 event pairs, 1496 based on Foata normal form. 951/4054 useless extension candidates. Maximal degree in co-relation 4337. Up to 2583 conditions per place. [2024-10-11 14:22:46,362 INFO L140 encePairwiseOnDemand]: 48/66 looper letters, 35 selfloop transitions, 2 changer transitions 5/62 dead transitions. [2024-10-11 14:22:46,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 62 transitions, 214 flow [2024-10-11 14:22:46,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:22:46,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:22:46,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 128 transitions. [2024-10-11 14:22:46,376 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6464646464646465 [2024-10-11 14:22:46,378 INFO L175 Difference]: Start difference. First operand has 56 places, 66 transitions, 142 flow. Second operand 3 states and 128 transitions. [2024-10-11 14:22:46,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 62 transitions, 214 flow [2024-10-11 14:22:46,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 62 transitions, 214 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-11 14:22:46,386 INFO L231 Difference]: Finished difference. Result has 59 places, 47 transitions, 114 flow [2024-10-11 14:22:46,390 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=59, PETRI_TRANSITIONS=47} [2024-10-11 14:22:46,394 INFO L277 CegarLoopForPetriNet]: 56 programPoint places, 3 predicate places. [2024-10-11 14:22:46,395 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 47 transitions, 114 flow [2024-10-11 14:22:46,395 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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) [2024-10-11 14:22:46,395 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:22:46,396 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2024-10-11 14:22:46,396 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 14:22:46,396 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:22:46,397 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:22:46,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1354736822, now seen corresponding path program 1 times [2024-10-11 14:22:46,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:22:46,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760627317] [2024-10-11 14:22:46,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:22:46,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:22:46,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 14:22:46,438 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-11 14:22:46,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 14:22:46,470 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-11 14:22:46,471 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-11 14:22:46,471 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2024-10-11 14:22:46,471 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-10-11 14:22:46,472 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-11 14:22:46,472 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-10-11 14:22:46,473 WARN L239 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-11 14:22:46,473 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-10-11 14:22:46,497 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-11 14:22:46,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 90 transitions, 198 flow [2024-10-11 14:22:46,518 INFO L124 PetriNetUnfolderBase]: 30/137 cut-off events. [2024-10-11 14:22:46,518 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-10-11 14:22:46,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150 conditions, 137 events. 30/137 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 509 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 104. Up to 8 conditions per place. [2024-10-11 14:22:46,519 INFO L82 GeneralOperation]: Start removeDead. Operand has 76 places, 90 transitions, 198 flow [2024-10-11 14:22:46,524 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 90 transitions, 198 flow [2024-10-11 14:22:46,526 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 14:22:46,527 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=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;@47e7d2d3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 14:22:46,528 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-10-11 14:22:46,531 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 14:22:46,531 INFO L124 PetriNetUnfolderBase]: 1/20 cut-off events. [2024-10-11 14:22:46,531 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-11 14:22:46,531 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:22:46,531 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-11 14:22:46,532 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:22:46,532 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:22:46,532 INFO L85 PathProgramCache]: Analyzing trace with hash 508629190, now seen corresponding path program 1 times [2024-10-11 14:22:46,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:22:46,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344217609] [2024-10-11 14:22:46,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:22:46,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:22:46,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:22:46,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:22:46,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:22:46,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344217609] [2024-10-11 14:22:46,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344217609] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:22:46,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:22:46,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 14:22:46,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398686731] [2024-10-11 14:22:46,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:22:46,601 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:22:46,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:22:46,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:22:46,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:22:46,602 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 90 [2024-10-11 14:22:46,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 90 transitions, 198 flow. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 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) [2024-10-11 14:22:46,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:22:46,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 90 [2024-10-11 14:22:46,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:22:51,082 INFO L124 PetriNetUnfolderBase]: 25002/41893 cut-off events. [2024-10-11 14:22:51,082 INFO L125 PetriNetUnfolderBase]: For 682/682 co-relation queries the response was YES. [2024-10-11 14:22:51,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77324 conditions, 41893 events. 25002/41893 cut-off events. For 682/682 co-relation queries the response was YES. Maximal size of possible extension queue 1241. Compared 354529 event pairs, 24993 based on Foata normal form. 13350/53199 useless extension candidates. Maximal degree in co-relation 44644. Up to 34983 conditions per place. [2024-10-11 14:22:51,318 INFO L140 encePairwiseOnDemand]: 66/90 looper letters, 45 selfloop transitions, 2 changer transitions 5/80 dead transitions. [2024-10-11 14:22:51,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 80 transitions, 278 flow [2024-10-11 14:22:51,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:22:51,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:22:51,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 168 transitions. [2024-10-11 14:22:51,322 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2024-10-11 14:22:51,323 INFO L175 Difference]: Start difference. First operand has 76 places, 90 transitions, 198 flow. Second operand 3 states and 168 transitions. [2024-10-11 14:22:51,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 80 transitions, 278 flow [2024-10-11 14:22:51,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 80 transitions, 276 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-10-11 14:22:51,328 INFO L231 Difference]: Finished difference. Result has 79 places, 65 transitions, 156 flow [2024-10-11 14:22:51,328 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=79, PETRI_TRANSITIONS=65} [2024-10-11 14:22:51,329 INFO L277 CegarLoopForPetriNet]: 76 programPoint places, 3 predicate places. [2024-10-11 14:22:51,329 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 65 transitions, 156 flow [2024-10-11 14:22:51,330 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 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) [2024-10-11 14:22:51,330 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:22:51,330 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:22:51,331 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-11 14:22:51,331 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:22:51,332 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:22:51,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1287317837, now seen corresponding path program 1 times [2024-10-11 14:22:51,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:22:51,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322088887] [2024-10-11 14:22:51,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:22:51,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:22:51,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:22:51,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:22:51,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:22:51,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322088887] [2024-10-11 14:22:51,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322088887] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:22:51,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677670671] [2024-10-11 14:22:51,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:22:51,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:22:51,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:22:51,416 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:22:51,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 14:22:51,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:22:51,514 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-11 14:22:51,516 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:22:51,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:22:51,552 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:22:51,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:22:51,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677670671] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:22:51,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:22:51,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-11 14:22:51,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82416936] [2024-10-11 14:22:51,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:22:51,577 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 14:22:51,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:22:51,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 14:22:51,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-11 14:22:51,578 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 90 [2024-10-11 14:22:51,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 65 transitions, 156 flow. Second operand has 7 states, 7 states have (on average 32.285714285714285) internal successors, (226), 7 states have internal predecessors, (226), 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) [2024-10-11 14:22:51,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:22:51,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 90 [2024-10-11 14:22:51,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:22:52,953 INFO L124 PetriNetUnfolderBase]: 7668/12948 cut-off events. [2024-10-11 14:22:52,954 INFO L125 PetriNetUnfolderBase]: For 4449/4449 co-relation queries the response was YES. [2024-10-11 14:22:52,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25408 conditions, 12948 events. 7668/12948 cut-off events. For 4449/4449 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 98144 event pairs, 990 based on Foata normal form. 1110/13634 useless extension candidates. Maximal degree in co-relation 2602. Up to 7400 conditions per place. [2024-10-11 14:22:53,016 INFO L140 encePairwiseOnDemand]: 87/90 looper letters, 88 selfloop transitions, 4 changer transitions 0/117 dead transitions. [2024-10-11 14:22:53,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 117 transitions, 444 flow [2024-10-11 14:22:53,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 14:22:53,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 14:22:53,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 275 transitions. [2024-10-11 14:22:53,019 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5092592592592593 [2024-10-11 14:22:53,019 INFO L175 Difference]: Start difference. First operand has 79 places, 65 transitions, 156 flow. Second operand 6 states and 275 transitions. [2024-10-11 14:22:53,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 117 transitions, 444 flow [2024-10-11 14:22:53,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 117 transitions, 442 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 14:22:53,024 INFO L231 Difference]: Finished difference. Result has 72 places, 60 transitions, 152 flow [2024-10-11 14:22:53,024 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=152, PETRI_PLACES=72, PETRI_TRANSITIONS=60} [2024-10-11 14:22:53,025 INFO L277 CegarLoopForPetriNet]: 76 programPoint places, -4 predicate places. [2024-10-11 14:22:53,025 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 60 transitions, 152 flow [2024-10-11 14:22:53,026 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 32.285714285714285) internal successors, (226), 7 states have internal predecessors, (226), 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) [2024-10-11 14:22:53,026 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:22:53,026 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2024-10-11 14:22:53,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-11 14:22:53,226 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:22:53,227 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:22:53,228 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:22:53,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1323193388, now seen corresponding path program 1 times [2024-10-11 14:22:53,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:22:53,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797432769] [2024-10-11 14:22:53,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:22:53,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:22:53,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 14:22:53,242 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-11 14:22:53,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 14:22:53,265 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-11 14:22:53,265 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-11 14:22:53,265 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2024-10-11 14:22:53,265 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-10-11 14:22:53,266 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-11 14:22:53,266 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-10-11 14:22:53,267 WARN L239 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-11 14:22:53,267 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-10-11 14:22:53,304 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-11 14:22:53,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 114 transitions, 256 flow [2024-10-11 14:22:53,324 INFO L124 PetriNetUnfolderBase]: 39/177 cut-off events. [2024-10-11 14:22:53,325 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-10-11 14:22:53,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 177 events. 39/177 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 707 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 149. Up to 10 conditions per place. [2024-10-11 14:22:53,325 INFO L82 GeneralOperation]: Start removeDead. Operand has 96 places, 114 transitions, 256 flow [2024-10-11 14:22:53,327 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 96 places, 114 transitions, 256 flow [2024-10-11 14:22:53,328 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 14:22:53,328 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=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;@47e7d2d3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 14:22:53,329 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-10-11 14:22:53,333 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 14:22:53,333 INFO L124 PetriNetUnfolderBase]: 1/20 cut-off events. [2024-10-11 14:22:53,333 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-11 14:22:53,333 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:22:53,333 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-11 14:22:53,333 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:22:53,333 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:22:53,333 INFO L85 PathProgramCache]: Analyzing trace with hash -413824122, now seen corresponding path program 1 times [2024-10-11 14:22:53,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:22:53,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625170248] [2024-10-11 14:22:53,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:22:53,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:22:53,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:22:53,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:22:53,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:22:53,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625170248] [2024-10-11 14:22:53,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625170248] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:22:53,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:22:53,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 14:22:53,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173047703] [2024-10-11 14:22:53,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:22:53,372 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:22:53,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:22:53,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:22:53,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:22:53,373 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 114 [2024-10-11 14:22:53,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 114 transitions, 256 flow. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 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) [2024-10-11 14:22:53,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:22:53,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 114 [2024-10-11 14:22:53,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand