./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_22-deref_read_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3289d67d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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 ../sv-benchmarks/c/goblint-regression/28-race_reach_22-deref_read_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 4ce97f399f5ab540e05119d9433f4e1bfecfe892f8e87faddc6435387a55a4d6 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-16 19:20:28,618 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-16 19:20:28,669 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-16 19:20:28,674 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-16 19:20:28,675 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-16 19:20:28,700 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-16 19:20:28,700 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-16 19:20:28,701 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-16 19:20:28,701 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-16 19:20:28,702 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-16 19:20:28,702 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-16 19:20:28,703 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-16 19:20:28,703 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-16 19:20:28,705 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-16 19:20:28,705 INFO L153 SettingsManager]: * Use SBE=true [2024-11-16 19:20:28,705 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-16 19:20:28,705 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-16 19:20:28,706 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-16 19:20:28,706 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-16 19:20:28,706 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-16 19:20:28,706 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-16 19:20:28,709 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-16 19:20:28,709 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-16 19:20:28,710 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-16 19:20:28,710 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-16 19:20:28,710 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-16 19:20:28,710 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-16 19:20:28,710 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-16 19:20:28,711 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-16 19:20:28,711 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-16 19:20:28,711 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-16 19:20:28,711 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-16 19:20:28,711 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 19:20:28,712 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-16 19:20:28,712 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-16 19:20:28,712 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-16 19:20:28,712 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-16 19:20:28,712 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-16 19:20:28,712 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-16 19:20:28,712 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-16 19:20:28,713 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-16 19:20:28,713 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-16 19:20:28,713 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ce97f399f5ab540e05119d9433f4e1bfecfe892f8e87faddc6435387a55a4d6 [2024-11-16 19:20:28,947 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-16 19:20:28,963 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-16 19:20:28,965 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-16 19:20:28,967 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-16 19:20:28,967 INFO L274 PluginConnector]: CDTParser initialized [2024-11-16 19:20:28,968 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_22-deref_read_racefree.i [2024-11-16 19:20:30,169 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-16 19:20:30,356 INFO L384 CDTParser]: Found 1 translation units. [2024-11-16 19:20:30,356 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_22-deref_read_racefree.i [2024-11-16 19:20:30,366 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d877bb2d8/65819c2802694760997042412329a6d7/FLAG2dd6d8e5f [2024-11-16 19:20:30,376 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d877bb2d8/65819c2802694760997042412329a6d7 [2024-11-16 19:20:30,378 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-16 19:20:30,379 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-16 19:20:30,380 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-16 19:20:30,380 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-16 19:20:30,384 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-16 19:20:30,385 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:20:30" (1/1) ... [2024-11-16 19:20:30,385 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34398650 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:20:30, skipping insertion in model container [2024-11-16 19:20:30,386 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:20:30" (1/1) ... [2024-11-16 19:20:30,419 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-16 19:20:30,666 WARN L250 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_22-deref_read_racefree.i[30176,30189] [2024-11-16 19:20:30,685 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 19:20:30,703 INFO L200 MainTranslator]: Completed pre-run [2024-11-16 19:20:30,740 WARN L250 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_22-deref_read_racefree.i[30176,30189] [2024-11-16 19:20:30,746 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 19:20:30,779 INFO L204 MainTranslator]: Completed translation [2024-11-16 19:20:30,779 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:20:30 WrapperNode [2024-11-16 19:20:30,780 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-16 19:20:30,781 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-16 19:20:30,781 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-16 19:20:30,781 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-16 19:20:30,787 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:20:30" (1/1) ... [2024-11-16 19:20:30,798 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:20:30" (1/1) ... [2024-11-16 19:20:30,813 INFO L138 Inliner]: procedures = 170, calls = 37, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 66 [2024-11-16 19:20:30,814 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-16 19:20:30,814 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-16 19:20:30,814 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-16 19:20:30,815 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-16 19:20:30,822 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:20:30" (1/1) ... [2024-11-16 19:20:30,822 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:20:30" (1/1) ... [2024-11-16 19:20:30,824 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:20:30" (1/1) ... [2024-11-16 19:20:30,836 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]. [2024-11-16 19:20:30,836 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:20:30" (1/1) ... [2024-11-16 19:20:30,837 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:20:30" (1/1) ... [2024-11-16 19:20:30,842 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:20:30" (1/1) ... [2024-11-16 19:20:30,842 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:20:30" (1/1) ... [2024-11-16 19:20:30,843 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:20:30" (1/1) ... [2024-11-16 19:20:30,844 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:20:30" (1/1) ... [2024-11-16 19:20:30,848 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-16 19:20:30,849 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-16 19:20:30,849 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-16 19:20:30,849 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-16 19:20:30,850 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:20:30" (1/1) ... [2024-11-16 19:20:30,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 19:20:30,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:20:30,878 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) [2024-11-16 19:20:30,880 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 [2024-11-16 19:20:30,912 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-16 19:20:30,912 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-16 19:20:30,912 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-16 19:20:30,912 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-16 19:20:30,913 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-16 19:20:30,913 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-16 19:20:30,913 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-16 19:20:30,913 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-16 19:20:30,913 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-16 19:20:30,913 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-16 19:20:30,913 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-11-16 19:20:30,914 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-11-16 19:20:30,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-16 19:20:30,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-16 19:20:30,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-16 19:20:30,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-16 19:20:30,914 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-16 19:20:30,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-16 19:20:30,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-16 19:20:30,915 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-16 19:20:31,038 INFO L256 CfgBuilder]: Building ICFG [2024-11-16 19:20:31,040 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-16 19:20:31,187 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-16 19:20:31,188 INFO L307 CfgBuilder]: Performing block encoding [2024-11-16 19:20:31,290 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-16 19:20:31,291 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-16 19:20:31,292 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:20:31 BoogieIcfgContainer [2024-11-16 19:20:31,292 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-16 19:20:31,293 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-16 19:20:31,294 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-16 19:20:31,297 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-16 19:20:31,297 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:20:30" (1/3) ... [2024-11-16 19:20:31,297 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45ab8f40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:20:31, skipping insertion in model container [2024-11-16 19:20:31,298 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:20:30" (2/3) ... [2024-11-16 19:20:31,299 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45ab8f40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:20:31, skipping insertion in model container [2024-11-16 19:20:31,299 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:20:31" (3/3) ... [2024-11-16 19:20:31,300 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_22-deref_read_racefree.i [2024-11-16 19:20:31,313 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-16 19:20:31,313 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-16 19:20:31,314 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-16 19:20:31,344 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-16 19:20:31,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 44 places, 51 transitions, 106 flow [2024-11-16 19:20:31,400 INFO L124 PetriNetUnfolderBase]: 14/73 cut-off events. [2024-11-16 19:20:31,402 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-16 19:20:31,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77 conditions, 73 events. 14/73 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 210 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 48. Up to 4 conditions per place. [2024-11-16 19:20:31,405 INFO L82 GeneralOperation]: Start removeDead. Operand has 44 places, 51 transitions, 106 flow [2024-11-16 19:20:31,408 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 51 transitions, 106 flow [2024-11-16 19:20:31,414 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:20:31,419 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;@4155a3e4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:20:31,419 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-16 19:20:31,424 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:20:31,424 INFO L124 PetriNetUnfolderBase]: 2/22 cut-off events. [2024-11-16 19:20:31,424 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-16 19:20:31,424 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:20:31,424 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2024-11-16 19:20:31,425 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:20:31,428 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:20:31,429 INFO L85 PathProgramCache]: Analyzing trace with hash 384931371, now seen corresponding path program 1 times [2024-11-16 19:20:31,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:20:31,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201389554] [2024-11-16 19:20:31,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:20:31,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:20:31,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:20:31,533 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-16 19:20:31,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:20:31,578 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-16 19:20:31,580 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-16 19:20:31,581 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2024-11-16 19:20:31,583 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-11-16 19:20:31,583 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-16 19:20:31,583 INFO L407 BasicCegarLoop]: Path program histogram: [1] [2024-11-16 19:20:31,588 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-16 19:20:31,589 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-16 19:20:31,608 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-16 19:20:31,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 77 transitions, 164 flow [2024-11-16 19:20:31,636 INFO L124 PetriNetUnfolderBase]: 24/122 cut-off events. [2024-11-16 19:20:31,637 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-16 19:20:31,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 122 events. 24/122 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 447 event pairs, 0 based on Foata normal form. 0/92 useless extension candidates. Maximal degree in co-relation 76. Up to 6 conditions per place. [2024-11-16 19:20:31,638 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 77 transitions, 164 flow [2024-11-16 19:20:31,639 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 77 transitions, 164 flow [2024-11-16 19:20:31,641 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:20:31,642 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;@4155a3e4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:20:31,643 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-16 19:20:31,650 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:20:31,650 INFO L124 PetriNetUnfolderBase]: 6/50 cut-off events. [2024-11-16 19:20:31,650 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-16 19:20:31,650 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:20:31,650 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:20:31,650 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:20:31,651 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:20:31,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1101558255, now seen corresponding path program 1 times [2024-11-16 19:20:31,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:20:31,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12044320] [2024-11-16 19:20:31,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:20:31,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:20:31,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:20:31,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:20:31,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:20:31,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12044320] [2024-11-16 19:20:31,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12044320] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:20:31,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:20:31,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:20:31,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268525563] [2024-11-16 19:20:31,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:20:31,744 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-16 19:20:31,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:20:31,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-16 19:20:31,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 19:20:31,771 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 77 [2024-11-16 19:20:31,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 77 transitions, 164 flow. Second operand has 2 states, 2 states have (on average 32.5) internal successors, (65), 2 states have internal predecessors, (65), 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) [2024-11-16 19:20:31,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:20:31,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 77 [2024-11-16 19:20:31,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:20:32,311 INFO L124 PetriNetUnfolderBase]: 2169/4543 cut-off events. [2024-11-16 19:20:32,311 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-11-16 19:20:32,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8079 conditions, 4543 events. 2169/4543 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 34185 event pairs, 2169 based on Foata normal form. 1879/6290 useless extension candidates. Maximal degree in co-relation 5901. Up to 3501 conditions per place. [2024-11-16 19:20:32,334 INFO L140 encePairwiseOnDemand]: 61/77 looper letters, 28 selfloop transitions, 0 changer transitions 6/61 dead transitions. [2024-11-16 19:20:32,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 61 transitions, 196 flow [2024-11-16 19:20:32,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-16 19:20:32,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-16 19:20:32,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 106 transitions. [2024-11-16 19:20:32,343 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6883116883116883 [2024-11-16 19:20:32,344 INFO L175 Difference]: Start difference. First operand has 66 places, 77 transitions, 164 flow. Second operand 2 states and 106 transitions. [2024-11-16 19:20:32,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 61 transitions, 196 flow [2024-11-16 19:20:32,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 61 transitions, 196 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-16 19:20:32,350 INFO L231 Difference]: Finished difference. Result has 67 places, 55 transitions, 120 flow [2024-11-16 19:20:32,352 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=120, PETRI_PLACES=67, PETRI_TRANSITIONS=55} [2024-11-16 19:20:32,354 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 1 predicate places. [2024-11-16 19:20:32,355 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 55 transitions, 120 flow [2024-11-16 19:20:32,355 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 32.5) internal successors, (65), 2 states have internal predecessors, (65), 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) [2024-11-16 19:20:32,355 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:20:32,356 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:20:32,356 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-16 19:20:32,356 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:20:32,357 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:20:32,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1158531440, now seen corresponding path program 1 times [2024-11-16 19:20:32,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:20:32,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865886255] [2024-11-16 19:20:32,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:20:32,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:20:32,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:20:32,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:20:32,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:20:32,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865886255] [2024-11-16 19:20:32,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865886255] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:20:32,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:20:32,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:20:32,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767979734] [2024-11-16 19:20:32,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:20:32,429 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 19:20:32,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:20:32,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 19:20:32,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 19:20:32,431 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 77 [2024-11-16 19:20:32,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 55 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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) [2024-11-16 19:20:32,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:20:32,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 77 [2024-11-16 19:20:32,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:20:32,695 INFO L124 PetriNetUnfolderBase]: 1602/3415 cut-off events. [2024-11-16 19:20:32,695 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2024-11-16 19:20:32,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6046 conditions, 3415 events. 1602/3415 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 24986 event pairs, 720 based on Foata normal form. 0/3249 useless extension candidates. Maximal degree in co-relation 6041. Up to 2583 conditions per place. [2024-11-16 19:20:32,760 INFO L140 encePairwiseOnDemand]: 74/77 looper letters, 38 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2024-11-16 19:20:32,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 66 transitions, 222 flow [2024-11-16 19:20:32,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-16 19:20:32,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-16 19:20:32,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 125 transitions. [2024-11-16 19:20:32,762 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5411255411255411 [2024-11-16 19:20:32,762 INFO L175 Difference]: Start difference. First operand has 67 places, 55 transitions, 120 flow. Second operand 3 states and 125 transitions. [2024-11-16 19:20:32,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 66 transitions, 222 flow [2024-11-16 19:20:32,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 66 transitions, 222 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-16 19:20:32,764 INFO L231 Difference]: Finished difference. Result has 64 places, 56 transitions, 132 flow [2024-11-16 19:20:32,765 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=64, PETRI_TRANSITIONS=56} [2024-11-16 19:20:32,765 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, -2 predicate places. [2024-11-16 19:20:32,765 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 56 transitions, 132 flow [2024-11-16 19:20:32,766 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 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) [2024-11-16 19:20:32,766 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:20:32,766 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1] [2024-11-16 19:20:32,766 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-16 19:20:32,766 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:20:32,767 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:20:32,767 INFO L85 PathProgramCache]: Analyzing trace with hash -758549178, now seen corresponding path program 1 times [2024-11-16 19:20:32,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:20:32,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385661415] [2024-11-16 19:20:32,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:20:32,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:20:32,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:20:32,790 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-16 19:20:32,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:20:32,804 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-16 19:20:32,805 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-16 19:20:32,805 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2024-11-16 19:20:32,805 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-11-16 19:20:32,805 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-16 19:20:32,805 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-11-16 19:20:32,806 WARN L244 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-16 19:20:32,806 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-16 19:20:32,825 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-16 19:20:32,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 103 transitions, 224 flow [2024-11-16 19:20:32,841 INFO L124 PetriNetUnfolderBase]: 34/171 cut-off events. [2024-11-16 19:20:32,841 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-16 19:20:32,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184 conditions, 171 events. 34/171 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 686 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 129. Up to 8 conditions per place. [2024-11-16 19:20:32,842 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 103 transitions, 224 flow [2024-11-16 19:20:32,843 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 88 places, 103 transitions, 224 flow [2024-11-16 19:20:32,844 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:20:32,845 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;@4155a3e4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:20:32,845 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-16 19:20:32,848 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:20:32,848 INFO L124 PetriNetUnfolderBase]: 6/50 cut-off events. [2024-11-16 19:20:32,848 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-16 19:20:32,848 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:20:32,848 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:20:32,848 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:20:32,849 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:20:32,849 INFO L85 PathProgramCache]: Analyzing trace with hash -57179569, now seen corresponding path program 1 times [2024-11-16 19:20:32,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:20:32,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972817424] [2024-11-16 19:20:32,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:20:32,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:20:32,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:20:32,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:20:32,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:20:32,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972817424] [2024-11-16 19:20:32,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972817424] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:20:32,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:20:32,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:20:32,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230734468] [2024-11-16 19:20:32,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:20:32,872 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-16 19:20:32,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:20:32,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-16 19:20:32,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 19:20:32,874 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 103 [2024-11-16 19:20:32,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 103 transitions, 224 flow. Second operand has 2 states, 2 states have (on average 42.5) internal successors, (85), 2 states have internal predecessors, (85), 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) [2024-11-16 19:20:32,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:20:32,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 103 [2024-11-16 19:20:32,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:20:37,006 INFO L124 PetriNetUnfolderBase]: 33669/57073 cut-off events. [2024-11-16 19:20:37,006 INFO L125 PetriNetUnfolderBase]: For 705/705 co-relation queries the response was YES. [2024-11-16 19:20:37,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104510 conditions, 57073 events. 33669/57073 cut-off events. For 705/705 co-relation queries the response was YES. Maximal size of possible extension queue 1619. Compared 514326 event pairs, 33669 based on Foata normal form. 26465/81862 useless extension candidates. Maximal degree in co-relation 52476. Up to 47001 conditions per place. [2024-11-16 19:20:37,236 INFO L140 encePairwiseOnDemand]: 81/103 looper letters, 38 selfloop transitions, 0 changer transitions 6/81 dead transitions. [2024-11-16 19:20:37,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 81 transitions, 264 flow [2024-11-16 19:20:37,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-16 19:20:37,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-16 19:20:37,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 142 transitions. [2024-11-16 19:20:37,240 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6893203883495146 [2024-11-16 19:20:37,241 INFO L175 Difference]: Start difference. First operand has 88 places, 103 transitions, 224 flow. Second operand 2 states and 142 transitions. [2024-11-16 19:20:37,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 81 transitions, 264 flow [2024-11-16 19:20:37,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 81 transitions, 262 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-11-16 19:20:37,244 INFO L231 Difference]: Finished difference. Result has 89 places, 75 transitions, 166 flow [2024-11-16 19:20:37,244 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=103, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=166, PETRI_PLACES=89, PETRI_TRANSITIONS=75} [2024-11-16 19:20:37,245 INFO L277 CegarLoopForPetriNet]: 88 programPoint places, 1 predicate places. [2024-11-16 19:20:37,245 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 75 transitions, 166 flow [2024-11-16 19:20:37,245 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 42.5) internal successors, (85), 2 states have internal predecessors, (85), 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) [2024-11-16 19:20:37,245 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:20:37,245 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:20:37,245 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-16 19:20:37,246 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:20:37,246 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:20:37,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1575301783, now seen corresponding path program 1 times [2024-11-16 19:20:37,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:20:37,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786701697] [2024-11-16 19:20:37,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:20:37,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:20:37,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:20:37,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:20:37,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:20:37,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786701697] [2024-11-16 19:20:37,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786701697] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:20:37,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:20:37,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:20:37,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945937890] [2024-11-16 19:20:37,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:20:37,302 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 19:20:37,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:20:37,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 19:20:37,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 19:20:37,305 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 103 [2024-11-16 19:20:37,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 75 transitions, 166 flow. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 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) [2024-11-16 19:20:37,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:20:37,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 103 [2024-11-16 19:20:37,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:20:39,767 INFO L124 PetriNetUnfolderBase]: 25002/42706 cut-off events. [2024-11-16 19:20:39,767 INFO L125 PetriNetUnfolderBase]: For 387/387 co-relation queries the response was YES. [2024-11-16 19:20:39,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78038 conditions, 42706 events. 25002/42706 cut-off events. For 387/387 co-relation queries the response was YES. Maximal size of possible extension queue 1280. Compared 374046 event pairs, 23996 based on Foata normal form. 0/40449 useless extension candidates. Maximal degree in co-relation 78032. Up to 34983 conditions per place. [2024-11-16 19:20:39,927 INFO L140 encePairwiseOnDemand]: 100/103 looper letters, 48 selfloop transitions, 2 changer transitions 0/86 dead transitions. [2024-11-16 19:20:39,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 86 transitions, 288 flow [2024-11-16 19:20:39,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-16 19:20:39,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-16 19:20:39,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 165 transitions. [2024-11-16 19:20:39,933 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5339805825242718 [2024-11-16 19:20:39,933 INFO L175 Difference]: Start difference. First operand has 89 places, 75 transitions, 166 flow. Second operand 3 states and 165 transitions. [2024-11-16 19:20:39,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 86 transitions, 288 flow [2024-11-16 19:20:39,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 86 transitions, 288 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-16 19:20:39,936 INFO L231 Difference]: Finished difference. Result has 86 places, 76 transitions, 178 flow [2024-11-16 19:20:39,936 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=103, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=86, PETRI_TRANSITIONS=76} [2024-11-16 19:20:39,937 INFO L277 CegarLoopForPetriNet]: 88 programPoint places, -2 predicate places. [2024-11-16 19:20:39,937 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 76 transitions, 178 flow [2024-11-16 19:20:39,938 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 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) [2024-11-16 19:20:39,938 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:20:39,938 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:20:39,938 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-16 19:20:39,938 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:20:39,938 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:20:39,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1559773002, now seen corresponding path program 1 times [2024-11-16 19:20:39,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:20:39,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164045967] [2024-11-16 19:20:39,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:20:39,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:20:39,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:20:39,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:20:39,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:20:39,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164045967] [2024-11-16 19:20:39,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164045967] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:20:39,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104850281] [2024-11-16 19:20:39,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:20:39,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:20:39,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:20:39,993 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:20:39,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-16 19:20:40,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:20:40,065 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-16 19:20:40,067 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:20:40,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:20:40,100 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:20:40,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:20:40,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104850281] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:20:40,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:20:40,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-16 19:20:40,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108481711] [2024-11-16 19:20:40,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:20:40,125 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-16 19:20:40,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:20:40,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-16 19:20:40,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-16 19:20:40,127 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 103 [2024-11-16 19:20:40,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 76 transitions, 178 flow. Second operand has 7 states, 7 states have (on average 40.714285714285715) internal successors, (285), 7 states have internal predecessors, (285), 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) [2024-11-16 19:20:40,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:20:40,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 103 [2024-11-16 19:20:40,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:20:41,094 INFO L124 PetriNetUnfolderBase]: 7668/13921 cut-off events. [2024-11-16 19:20:41,095 INFO L125 PetriNetUnfolderBase]: For 3119/3119 co-relation queries the response was YES. [2024-11-16 19:20:41,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26382 conditions, 13921 events. 7668/13921 cut-off events. For 3119/3119 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 112704 event pairs, 800 based on Foata normal form. 1110/14898 useless extension candidates. Maximal degree in co-relation 26374. Up to 7400 conditions per place. [2024-11-16 19:20:41,148 INFO L140 encePairwiseOnDemand]: 100/103 looper letters, 88 selfloop transitions, 4 changer transitions 0/124 dead transitions. [2024-11-16 19:20:41,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 124 transitions, 458 flow [2024-11-16 19:20:41,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-16 19:20:41,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-16 19:20:41,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 323 transitions. [2024-11-16 19:20:41,150 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5226537216828478 [2024-11-16 19:20:41,150 INFO L175 Difference]: Start difference. First operand has 86 places, 76 transitions, 178 flow. Second operand 6 states and 323 transitions. [2024-11-16 19:20:41,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 124 transitions, 458 flow [2024-11-16 19:20:41,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 124 transitions, 456 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-16 19:20:41,156 INFO L231 Difference]: Finished difference. Result has 80 places, 67 transitions, 166 flow [2024-11-16 19:20:41,156 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=103, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=166, PETRI_PLACES=80, PETRI_TRANSITIONS=67} [2024-11-16 19:20:41,157 INFO L277 CegarLoopForPetriNet]: 88 programPoint places, -8 predicate places. [2024-11-16 19:20:41,158 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 67 transitions, 166 flow [2024-11-16 19:20:41,158 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 40.714285714285715) internal successors, (285), 7 states have internal predecessors, (285), 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) [2024-11-16 19:20:41,158 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:20:41,159 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1] [2024-11-16 19:20:41,173 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-16 19:20:41,363 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:20:41,364 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:20:41,364 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:20:41,364 INFO L85 PathProgramCache]: Analyzing trace with hash -37299820, now seen corresponding path program 1 times [2024-11-16 19:20:41,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:20:41,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493802545] [2024-11-16 19:20:41,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:20:41,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:20:41,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:20:41,383 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-16 19:20:41,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:20:41,401 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-16 19:20:41,401 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-16 19:20:41,402 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2024-11-16 19:20:41,402 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-11-16 19:20:41,403 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-16 19:20:41,403 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-11-16 19:20:41,403 WARN L244 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-16 19:20:41,404 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-11-16 19:20:41,429 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-16 19:20:41,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 129 transitions, 286 flow [2024-11-16 19:20:41,453 INFO L124 PetriNetUnfolderBase]: 44/220 cut-off events. [2024-11-16 19:20:41,454 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-11-16 19:20:41,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239 conditions, 220 events. 44/220 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 876 event pairs, 0 based on Foata normal form. 0/166 useless extension candidates. Maximal degree in co-relation 183. Up to 10 conditions per place. [2024-11-16 19:20:41,455 INFO L82 GeneralOperation]: Start removeDead. Operand has 110 places, 129 transitions, 286 flow [2024-11-16 19:20:41,457 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 110 places, 129 transitions, 286 flow [2024-11-16 19:20:41,458 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:20:41,459 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;@4155a3e4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:20:41,459 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-16 19:20:41,463 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:20:41,463 INFO L124 PetriNetUnfolderBase]: 6/50 cut-off events. [2024-11-16 19:20:41,463 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-16 19:20:41,463 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:20:41,464 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:20:41,464 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:20:41,464 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:20:41,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1341619473, now seen corresponding path program 1 times [2024-11-16 19:20:41,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:20:41,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516705408] [2024-11-16 19:20:41,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:20:41,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:20:41,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:20:41,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:20:41,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:20:41,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516705408] [2024-11-16 19:20:41,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516705408] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:20:41,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:20:41,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:20:41,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759675388] [2024-11-16 19:20:41,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:20:41,482 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-16 19:20:41,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:20:41,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-16 19:20:41,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 19:20:41,483 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 129 [2024-11-16 19:20:41,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 129 transitions, 286 flow. Second operand has 2 states, 2 states have (on average 52.5) internal successors, (105), 2 states have internal predecessors, (105), 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) [2024-11-16 19:20:41,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:20:41,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 129 [2024-11-16 19:20:41,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand