/root/.sdkman/candidates/java/21.0.5-tem/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata ./data -tc ../benchexec/../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../benchexec/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.automaton.type.used.in.concurrency.analysis PETRI_NET -i ../../../trunk/examples/svcomp/pthread-ext/08_rand_cas.i -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.cfg-lbe-improvements-94356ea-m [2025-04-13 19:16:16,789 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-13 19:16:16,845 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../benchexec/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2025-04-13 19:16:16,850 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-13 19:16:16,850 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-13 19:16:16,871 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-13 19:16:16,872 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-13 19:16:16,872 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-13 19:16:16,872 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-13 19:16:16,872 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-13 19:16:16,872 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-13 19:16:16,872 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-13 19:16:16,873 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-13 19:16:16,873 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-13 19:16:16,874 INFO L153 SettingsManager]: * Use SBE=true [2025-04-13 19:16:16,874 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-13 19:16:16,874 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-13 19:16:16,874 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-13 19:16:16,874 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-13 19:16:16,874 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-13 19:16:16,874 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-13 19:16:16,874 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-13 19:16:16,875 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-13 19:16:16,875 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-13 19:16:16,875 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-13 19:16:16,875 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-13 19:16:16,875 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-13 19:16:16,875 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-13 19:16:16,875 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-13 19:16:16,875 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 19:16:16,875 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 19:16:16,875 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 19:16:16,875 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 19:16:16,875 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-13 19:16:16,875 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 19:16:16,875 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 19:16:16,875 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 19:16:16,875 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 19:16:16,876 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-13 19:16:16,876 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-13 19:16:16,876 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-13 19:16:16,876 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-13 19:16:16,876 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-13 19:16:16,876 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-13 19:16:16,876 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-13 19:16:16,876 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-13 19:16:16,876 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-13 19:16:16,876 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Automaton type used in concurrency analysis -> PETRI_NET [2025-04-13 19:16:17,099 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-13 19:16:17,108 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-13 19:16:17,110 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-13 19:16:17,112 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-13 19:16:17,113 INFO L274 PluginConnector]: CDTParser initialized [2025-04-13 19:16:17,114 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/08_rand_cas.i [2025-04-13 19:16:18,412 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9f969765/b4ab8520da714de8960bb291ca3b1e38/FLAGc8c390546 [2025-04-13 19:16:18,695 INFO L389 CDTParser]: Found 1 translation units. [2025-04-13 19:16:18,696 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/08_rand_cas.i [2025-04-13 19:16:18,713 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9f969765/b4ab8520da714de8960bb291ca3b1e38/FLAGc8c390546 [2025-04-13 19:16:19,463 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9f969765/b4ab8520da714de8960bb291ca3b1e38 [2025-04-13 19:16:19,466 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-13 19:16:19,469 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2025-04-13 19:16:19,470 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-13 19:16:19,470 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-13 19:16:19,474 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-13 19:16:19,474 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 07:16:19" (1/1) ... [2025-04-13 19:16:19,475 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dc5dd3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:16:19, skipping insertion in model container [2025-04-13 19:16:19,475 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 07:16:19" (1/1) ... [2025-04-13 19:16:19,502 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-13 19:16:19,731 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/08_rand_cas.i[30837,30850] [2025-04-13 19:16:19,737 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/08_rand_cas.i[31185,31198] [2025-04-13 19:16:19,738 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/08_rand_cas.i[31448,31461] [2025-04-13 19:16:19,742 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 19:16:19,748 INFO L200 MainTranslator]: Completed pre-run [2025-04-13 19:16:19,803 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/08_rand_cas.i[30837,30850] [2025-04-13 19:16:19,805 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/08_rand_cas.i[31185,31198] [2025-04-13 19:16:19,806 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/08_rand_cas.i[31448,31461] [2025-04-13 19:16:19,807 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 19:16:19,832 INFO L204 MainTranslator]: Completed translation [2025-04-13 19:16:19,833 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:16:19 WrapperNode [2025-04-13 19:16:19,833 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-13 19:16:19,834 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-13 19:16:19,834 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-13 19:16:19,834 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-13 19:16:19,838 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:16:19" (1/1) ... [2025-04-13 19:16:19,850 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:16:19" (1/1) ... [2025-04-13 19:16:19,873 INFO L138 Inliner]: procedures = 178, calls = 35, calls flagged for inlining = 13, calls inlined = 14, statements flattened = 135 [2025-04-13 19:16:19,873 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-13 19:16:19,874 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-13 19:16:19,874 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-13 19:16:19,874 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-13 19:16:19,879 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:16:19" (1/1) ... [2025-04-13 19:16:19,880 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:16:19" (1/1) ... [2025-04-13 19:16:19,883 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:16:19" (1/1) ... [2025-04-13 19:16:19,904 INFO L175 MemorySlicer]: Split 11 memory accesses to 3 slices as follows [2, 3, 6]. 55 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 0, 1]. The 4 writes are split as follows [0, 2, 2]. [2025-04-13 19:16:19,904 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:16:19" (1/1) ... [2025-04-13 19:16:19,905 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:16:19" (1/1) ... [2025-04-13 19:16:19,909 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:16:19" (1/1) ... [2025-04-13 19:16:19,910 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:16:19" (1/1) ... [2025-04-13 19:16:19,916 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:16:19" (1/1) ... [2025-04-13 19:16:19,917 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:16:19" (1/1) ... [2025-04-13 19:16:19,917 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:16:19" (1/1) ... [2025-04-13 19:16:19,920 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-13 19:16:19,921 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-04-13 19:16:19,921 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-04-13 19:16:19,921 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-04-13 19:16:19,924 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:16:19" (1/1) ... [2025-04-13 19:16:19,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 19:16:19,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 19:16:19,949 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) [2025-04-13 19:16:19,950 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 [2025-04-13 19:16:19,966 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-04-13 19:16:19,966 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-04-13 19:16:19,966 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-04-13 19:16:19,966 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2025-04-13 19:16:19,966 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2025-04-13 19:16:19,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-04-13 19:16:19,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-04-13 19:16:19,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-04-13 19:16:19,966 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-04-13 19:16:19,966 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-13 19:16:19,966 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-04-13 19:16:19,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-04-13 19:16:19,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-04-13 19:16:19,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-04-13 19:16:19,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-04-13 19:16:19,967 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-04-13 19:16:19,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-13 19:16:19,967 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-13 19:16:19,968 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-04-13 19:16:20,077 INFO L234 CfgBuilder]: Building ICFG [2025-04-13 19:16:20,079 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-13 19:16:20,238 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-13 19:16:20,239 INFO L289 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-13 19:16:20,239 INFO L294 CfgBuilder]: Performing block encoding [2025-04-13 19:16:20,407 WARN L179 LargeBlockEncoding]: Complex 2:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 19:16:20,410 WARN L179 LargeBlockEncoding]: Complex 2:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 19:16:20,417 INFO L313 CfgBuilder]: Removed 4 assume(true) statements. [2025-04-13 19:16:20,418 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.04 07:16:20 BoogieIcfgContainer [2025-04-13 19:16:20,418 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-04-13 19:16:20,420 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-13 19:16:20,420 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-13 19:16:20,423 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-13 19:16:20,423 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.04 07:16:19" (1/3) ... [2025-04-13 19:16:20,423 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35e4196f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 07:16:20, skipping insertion in model container [2025-04-13 19:16:20,423 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 07:16:19" (2/3) ... [2025-04-13 19:16:20,424 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35e4196f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 07:16:20, skipping insertion in model container [2025-04-13 19:16:20,424 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.04 07:16:20" (3/3) ... [2025-04-13 19:16:20,425 INFO L128 eAbstractionObserver]: Analyzing ICFG 08_rand_cas.i [2025-04-13 19:16:20,436 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-13 19:16:20,437 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG 08_rand_cas.i that has 2 procedures, 22 locations, 29 edges, 1 initial locations, 4 loop locations, and 3 error locations. [2025-04-13 19:16:20,437 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-13 19:16:20,489 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-04-13 19:16:20,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 25 places, 30 transitions, 64 flow [2025-04-13 19:16:20,538 INFO L116 PetriNetUnfolderBase]: 7/30 cut-off events. [2025-04-13 19:16:20,540 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-13 19:16:20,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 30 events. 7/30 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 35 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 26. Up to 4 conditions per place. [2025-04-13 19:16:20,541 INFO L82 GeneralOperation]: Start removeDead. Operand has 25 places, 30 transitions, 64 flow [2025-04-13 19:16:20,543 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 29 transitions, 62 flow [2025-04-13 19:16:20,552 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 19:16:20,564 INFO L340 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;@aab661b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 19:16:20,564 INFO L341 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2025-04-13 19:16:20,566 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-13 19:16:20,566 INFO L116 PetriNetUnfolderBase]: 0/5 cut-off events. [2025-04-13 19:16:20,566 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-13 19:16:20,567 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:16:20,567 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2025-04-13 19:16:20,567 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2025-04-13 19:16:20,571 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:16:20,572 INFO L85 PathProgramCache]: Analyzing trace with hash 13363856, now seen corresponding path program 1 times [2025-04-13 19:16:20,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:16:20,577 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738297920] [2025-04-13 19:16:20,577 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:16:20,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:16:20,646 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-04-13 19:16:20,667 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-04-13 19:16:20,667 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:16:20,667 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-13 19:16:20,667 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-13 19:16:20,671 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-04-13 19:16:20,674 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-04-13 19:16:20,674 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:16:20,674 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-13 19:16:20,688 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-13 19:16:20,689 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-04-13 19:16:20,690 INFO L790 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2025-04-13 19:16:20,692 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2025-04-13 19:16:20,692 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2025-04-13 19:16:20,692 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2025-04-13 19:16:20,693 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2025-04-13 19:16:20,693 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2025-04-13 19:16:20,693 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2025-04-13 19:16:20,693 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-13 19:16:20,694 INFO L422 BasicCegarLoop]: Path program histogram: [1] [2025-04-13 19:16:20,699 WARN L247 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2025-04-13 19:16:20,699 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2025-04-13 19:16:20,749 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-04-13 19:16:20,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 55 transitions, 120 flow [2025-04-13 19:16:20,769 INFO L116 PetriNetUnfolderBase]: 14/57 cut-off events. [2025-04-13 19:16:20,769 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-13 19:16:20,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 57 events. 14/57 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 132 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 50. Up to 4 conditions per place. [2025-04-13 19:16:20,770 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 55 transitions, 120 flow [2025-04-13 19:16:20,771 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 54 transitions, 118 flow [2025-04-13 19:16:20,775 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 19:16:20,775 INFO L340 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;@aab661b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 19:16:20,775 INFO L341 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2025-04-13 19:16:20,780 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-13 19:16:20,780 INFO L116 PetriNetUnfolderBase]: 0/14 cut-off events. [2025-04-13 19:16:20,780 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-13 19:16:20,780 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:16:20,780 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2025-04-13 19:16:20,780 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2025-04-13 19:16:20,781 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:16:20,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1607056005, now seen corresponding path program 1 times [2025-04-13 19:16:20,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:16:20,781 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087936866] [2025-04-13 19:16:20,781 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:16:20,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:16:20,795 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-04-13 19:16:20,802 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-04-13 19:16:20,803 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:16:20,803 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-13 19:16:20,803 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-13 19:16:20,807 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-04-13 19:16:20,816 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-04-13 19:16:20,816 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:16:20,816 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-13 19:16:20,821 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-13 19:16:20,821 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-04-13 19:16:20,821 INFO L790 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2025-04-13 19:16:20,821 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (8 of 10 remaining) [2025-04-13 19:16:20,821 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (7 of 10 remaining) [2025-04-13 19:16:20,821 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (6 of 10 remaining) [2025-04-13 19:16:20,821 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (5 of 10 remaining) [2025-04-13 19:16:20,822 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 10 remaining) [2025-04-13 19:16:20,822 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (3 of 10 remaining) [2025-04-13 19:16:20,822 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (2 of 10 remaining) [2025-04-13 19:16:20,822 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 10 remaining) [2025-04-13 19:16:20,822 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 10 remaining) [2025-04-13 19:16:20,822 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-04-13 19:16:20,822 INFO L422 BasicCegarLoop]: Path program histogram: [1] [2025-04-13 19:16:20,823 WARN L247 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2025-04-13 19:16:20,823 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2025-04-13 19:16:20,877 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-04-13 19:16:20,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 80 transitions, 178 flow [2025-04-13 19:16:20,902 INFO L116 PetriNetUnfolderBase]: 21/84 cut-off events. [2025-04-13 19:16:20,903 INFO L117 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2025-04-13 19:16:20,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97 conditions, 84 events. 21/84 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 253 event pairs, 0 based on Foata normal form. 0/50 useless extension candidates. Maximal degree in co-relation 74. Up to 4 conditions per place. [2025-04-13 19:16:20,903 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 80 transitions, 178 flow [2025-04-13 19:16:20,904 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 65 places, 79 transitions, 176 flow [2025-04-13 19:16:20,905 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 19:16:20,906 INFO L340 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;@aab661b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 19:16:20,906 INFO L341 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2025-04-13 19:16:20,911 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-13 19:16:20,912 INFO L116 PetriNetUnfolderBase]: 2/28 cut-off events. [2025-04-13 19:16:20,912 INFO L117 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2025-04-13 19:16:20,912 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:16:20,912 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1] [2025-04-13 19:16:20,912 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 9 more)] === [2025-04-13 19:16:20,912 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:16:20,912 INFO L85 PathProgramCache]: Analyzing trace with hash 378451307, now seen corresponding path program 1 times [2025-04-13 19:16:20,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:16:20,912 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745501935] [2025-04-13 19:16:20,913 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:16:20,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:16:20,921 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-04-13 19:16:20,927 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-04-13 19:16:20,927 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:16:20,927 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-13 19:16:20,927 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-13 19:16:20,931 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-04-13 19:16:20,936 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-04-13 19:16:20,936 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:16:20,936 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-13 19:16:20,940 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-13 19:16:20,940 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-04-13 19:16:20,940 INFO L790 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 13 remaining) [2025-04-13 19:16:20,940 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (11 of 13 remaining) [2025-04-13 19:16:20,940 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (10 of 13 remaining) [2025-04-13 19:16:20,940 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (9 of 13 remaining) [2025-04-13 19:16:20,940 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (8 of 13 remaining) [2025-04-13 19:16:20,940 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (7 of 13 remaining) [2025-04-13 19:16:20,940 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (6 of 13 remaining) [2025-04-13 19:16:20,940 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (5 of 13 remaining) [2025-04-13 19:16:20,940 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 13 remaining) [2025-04-13 19:16:20,940 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (3 of 13 remaining) [2025-04-13 19:16:20,941 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (2 of 13 remaining) [2025-04-13 19:16:20,941 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 13 remaining) [2025-04-13 19:16:20,941 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 13 remaining) [2025-04-13 19:16:20,941 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-04-13 19:16:20,941 INFO L422 BasicCegarLoop]: Path program histogram: [1] [2025-04-13 19:16:20,941 WARN L247 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2025-04-13 19:16:20,941 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2025-04-13 19:16:20,993 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-04-13 19:16:20,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 105 transitions, 238 flow [2025-04-13 19:16:21,019 INFO L116 PetriNetUnfolderBase]: 28/111 cut-off events. [2025-04-13 19:16:21,020 INFO L117 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2025-04-13 19:16:21,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 111 events. 28/111 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 358 event pairs, 0 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 98. Up to 5 conditions per place. [2025-04-13 19:16:21,022 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 105 transitions, 238 flow [2025-04-13 19:16:21,024 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 85 places, 104 transitions, 236 flow [2025-04-13 19:16:21,027 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 19:16:21,027 INFO L340 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;@aab661b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 19:16:21,027 INFO L341 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2025-04-13 19:16:21,037 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-13 19:16:21,037 INFO L116 PetriNetUnfolderBase]: 3/34 cut-off events. [2025-04-13 19:16:21,037 INFO L117 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2025-04-13 19:16:21,037 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:16:21,037 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:16:21,037 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err2ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2025-04-13 19:16:21,038 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:16:21,038 INFO L85 PathProgramCache]: Analyzing trace with hash -2077771211, now seen corresponding path program 1 times [2025-04-13 19:16:21,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:16:21,038 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603283617] [2025-04-13 19:16:21,038 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:16:21,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:16:21,049 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-04-13 19:16:21,060 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-04-13 19:16:21,061 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:16:21,061 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:16:21,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:16:21,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:16:21,152 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603283617] [2025-04-13 19:16:21,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603283617] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 19:16:21,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 19:16:21,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-04-13 19:16:21,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640465495] [2025-04-13 19:16:21,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 19:16:21,157 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-13 19:16:21,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:16:21,175 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-13 19:16:21,176 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-13 19:16:21,176 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 105 [2025-04-13 19:16:21,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 104 transitions, 236 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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) [2025-04-13 19:16:21,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:16:21,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 105 [2025-04-13 19:16:21,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 19:16:51,852 INFO L116 PetriNetUnfolderBase]: 527226/659558 cut-off events. [2025-04-13 19:16:51,852 INFO L117 PetriNetUnfolderBase]: For 31952/31952 co-relation queries the response was YES. [2025-04-13 19:16:52,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1332299 conditions, 659558 events. 527226/659558 cut-off events. For 31952/31952 co-relation queries the response was YES. Maximal size of possible extension queue 13631. Compared 3980234 event pairs, 302933 based on Foata normal form. 0/462735 useless extension candidates. Maximal degree in co-relation 1085141. Up to 656488 conditions per place. [2025-04-13 19:16:55,676 INFO L140 encePairwiseOnDemand]: 79/105 looper letters, 89 selfloop transitions, 5 changer transitions 0/103 dead transitions. [2025-04-13 19:16:55,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 103 transitions, 443 flow [2025-04-13 19:16:55,678 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-13 19:16:55,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-13 19:16:55,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 143 transitions. [2025-04-13 19:16:55,697 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.45396825396825397 [2025-04-13 19:16:55,698 INFO L175 Difference]: Start difference. First operand has 85 places, 104 transitions, 236 flow. Second operand 3 states and 143 transitions. [2025-04-13 19:16:55,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 103 transitions, 443 flow [2025-04-13 19:16:55,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 103 transitions, 431 flow, removed 6 selfloop flow, removed 0 redundant places. [2025-04-13 19:16:55,738 INFO L231 Difference]: Finished difference. Result has 87 places, 95 transitions, 251 flow [2025-04-13 19:16:55,740 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=251, PETRI_PLACES=87, PETRI_TRANSITIONS=95} [2025-04-13 19:16:55,742 INFO L279 CegarLoopForPetriNet]: 85 programPoint places, 2 predicate places. [2025-04-13 19:16:55,742 INFO L485 AbstractCegarLoop]: Abstraction has has 87 places, 95 transitions, 251 flow [2025-04-13 19:16:55,742 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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) [2025-04-13 19:16:55,742 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 19:16:55,742 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 19:16:55,742 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-04-13 19:16:55,743 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2025-04-13 19:16:55,743 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 19:16:55,743 INFO L85 PathProgramCache]: Analyzing trace with hash 12648249, now seen corresponding path program 1 times [2025-04-13 19:16:55,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 19:16:55,743 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226425620] [2025-04-13 19:16:55,744 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 19:16:55,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 19:16:55,911 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-04-13 19:16:55,921 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-04-13 19:16:55,921 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 19:16:55,921 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 19:16:56,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 19:16:56,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 19:16:56,049 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226425620] [2025-04-13 19:16:56,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226425620] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 19:16:56,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 19:16:56,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-13 19:16:56,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442215419] [2025-04-13 19:16:56,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 19:16:56,049 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-13 19:16:56,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 19:16:56,049 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-13 19:16:56,050 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-13 19:16:56,051 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 105 [2025-04-13 19:16:56,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 95 transitions, 251 flow. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 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) [2025-04-13 19:16:56,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 19:16:56,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 105 [2025-04-13 19:16:56,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand