./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/twostage_3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 798a7b37 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/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_1.6.800.v20240513-1750.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/pthread/twostage_3.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 1032ef3fe166161226ca7e81ea27802cfc3f516ad1e4b45c387461fe1ddeccf8 --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-04 02:01:50,075 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-04 02:01:50,125 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-04 02:01:50,129 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-04 02:01:50,129 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-04 02:01:50,146 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-04 02:01:50,147 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-04 02:01:50,147 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-04 02:01:50,147 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-04 02:01:50,147 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-04 02:01:50,147 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-04 02:01:50,147 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-04 02:01:50,148 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-04 02:01:50,148 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-04 02:01:50,148 INFO L153 SettingsManager]: * Use SBE=true [2025-03-04 02:01:50,148 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-04 02:01:50,148 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-04 02:01:50,148 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-04 02:01:50,148 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-04 02:01:50,148 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-04 02:01:50,148 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-04 02:01:50,148 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-04 02:01:50,148 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-04 02:01:50,149 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-04 02:01:50,149 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-04 02:01:50,149 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-04 02:01:50,149 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-04 02:01:50,149 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-04 02:01:50,149 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-04 02:01:50,149 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-04 02:01:50,149 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-04 02:01:50,149 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-04 02:01:50,149 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-04 02:01:50,149 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-04 02:01:50,150 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-04 02:01:50,150 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-04 02:01:50,150 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-04 02:01:50,150 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-04 02:01:50,150 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-04 02:01:50,150 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-04 02:01:50,150 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-04 02:01:50,150 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-04 02:01:50,150 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-04 02:01:50,150 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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 -> 1032ef3fe166161226ca7e81ea27802cfc3f516ad1e4b45c387461fe1ddeccf8 [2025-03-04 02:01:50,374 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-04 02:01:50,384 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-04 02:01:50,386 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-04 02:01:50,387 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-04 02:01:50,388 INFO L274 PluginConnector]: CDTParser initialized [2025-03-04 02:01:50,393 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/twostage_3.i [2025-03-04 02:01:51,623 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5695a8ec/67773f290e914c208f50a8760db345f2/FLAG3241c4450 [2025-03-04 02:01:51,968 INFO L384 CDTParser]: Found 1 translation units. [2025-03-04 02:01:51,970 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/twostage_3.i [2025-03-04 02:01:51,990 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5695a8ec/67773f290e914c208f50a8760db345f2/FLAG3241c4450 [2025-03-04 02:01:52,182 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5695a8ec/67773f290e914c208f50a8760db345f2 [2025-03-04 02:01:52,184 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-04 02:01:52,185 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-04 02:01:52,187 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-04 02:01:52,187 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-04 02:01:52,190 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-04 02:01:52,191 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 02:01:52" (1/1) ... [2025-03-04 02:01:52,192 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6969ebf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:01:52, skipping insertion in model container [2025-03-04 02:01:52,193 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 02:01:52" (1/1) ... [2025-03-04 02:01:52,230 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-04 02:01:52,602 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/pthread/twostage_3.i[59093,59106] [2025-03-04 02:01:52,623 WARN L1731 CHandler]: Possible shadowing of function lock [2025-03-04 02:01:52,624 WARN L1731 CHandler]: Possible shadowing of function lock [2025-03-04 02:01:52,625 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 02:01:52,632 INFO L200 MainTranslator]: Completed pre-run [2025-03-04 02:01:52,663 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/pthread/twostage_3.i[59093,59106] [2025-03-04 02:01:52,671 WARN L1731 CHandler]: Possible shadowing of function lock [2025-03-04 02:01:52,672 WARN L1731 CHandler]: Possible shadowing of function lock [2025-03-04 02:01:52,672 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 02:01:52,737 INFO L204 MainTranslator]: Completed translation [2025-03-04 02:01:52,737 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:01:52 WrapperNode [2025-03-04 02:01:52,737 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-04 02:01:52,738 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-04 02:01:52,738 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-04 02:01:52,738 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-04 02:01:52,742 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:01:52" (1/1) ... [2025-03-04 02:01:52,761 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:01:52" (1/1) ... [2025-03-04 02:01:52,786 INFO L138 Inliner]: procedures = 373, calls = 33, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 128 [2025-03-04 02:01:52,786 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-04 02:01:52,787 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-04 02:01:52,787 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-04 02:01:52,787 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-04 02:01:52,793 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:01:52" (1/1) ... [2025-03-04 02:01:52,793 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:01:52" (1/1) ... [2025-03-04 02:01:52,796 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:01:52" (1/1) ... [2025-03-04 02:01:52,811 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2025-03-04 02:01:52,812 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:01:52" (1/1) ... [2025-03-04 02:01:52,812 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:01:52" (1/1) ... [2025-03-04 02:01:52,818 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:01:52" (1/1) ... [2025-03-04 02:01:52,822 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:01:52" (1/1) ... [2025-03-04 02:01:52,823 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:01:52" (1/1) ... [2025-03-04 02:01:52,824 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:01:52" (1/1) ... [2025-03-04 02:01:52,826 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-04 02:01:52,827 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-04 02:01:52,827 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-04 02:01:52,827 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-04 02:01:52,828 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:01:52" (1/1) ... [2025-03-04 02:01:52,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-04 02:01:52,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 02:01:52,856 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) [2025-03-04 02:01:52,861 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 [2025-03-04 02:01:52,875 INFO L130 BoogieDeclarations]: Found specification of procedure funcA [2025-03-04 02:01:52,875 INFO L138 BoogieDeclarations]: Found implementation of procedure funcA [2025-03-04 02:01:52,875 INFO L130 BoogieDeclarations]: Found specification of procedure funcB [2025-03-04 02:01:52,875 INFO L138 BoogieDeclarations]: Found implementation of procedure funcB [2025-03-04 02:01:52,876 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-04 02:01:52,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-04 02:01:52,876 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2025-03-04 02:01:52,876 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-04 02:01:52,876 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-04 02:01:52,876 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-03-04 02:01:52,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-04 02:01:52,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-04 02:01:52,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-03-04 02:01:52,876 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2025-03-04 02:01:52,876 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-04 02:01:52,876 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-04 02:01:52,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-04 02:01:52,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-04 02:01:52,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-03-04 02:01:52,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-04 02:01:52,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-04 02:01:52,878 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-04 02:01:53,015 INFO L256 CfgBuilder]: Building ICFG [2025-03-04 02:01:53,017 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-04 02:01:53,301 INFO L1325 $ProcedureCfgBuilder]: dead code at ProgramPoint L1301: havoc main_~#tPool~0#1.base, main_~#tPool~0#1.offset; [2025-03-04 02:01:53,301 INFO L1325 $ProcedureCfgBuilder]: dead code at ProgramPoint L1301-1: SUMMARY for call ULTIMATE.dealloc(main_~#tPool~0#1.base, main_~#tPool~0#1.offset); srcloc: null [2025-03-04 02:01:53,301 INFO L1325 $ProcedureCfgBuilder]: dead code at ProgramPoint L1302: havoc main_~#rPool~0#1.base, main_~#rPool~0#1.offset; [2025-03-04 02:01:53,301 INFO L1325 $ProcedureCfgBuilder]: dead code at ProgramPoint L1302-1: SUMMARY for call ULTIMATE.dealloc(main_~#rPool~0#1.base, main_~#rPool~0#1.offset); srcloc: null [2025-03-04 02:01:53,302 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-04 02:01:53,303 INFO L307 CfgBuilder]: Performing block encoding [2025-03-04 02:01:53,497 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-04 02:01:53,497 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-04 02:01:53,498 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 04.03 02:01:53 BoogieIcfgContainer [2025-03-04 02:01:53,498 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-04 02:01:53,499 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-04 02:01:53,499 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-04 02:01:53,503 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-04 02:01:53,503 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.03 02:01:52" (1/3) ... [2025-03-04 02:01:53,503 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b8e07c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.03 02:01:53, skipping insertion in model container [2025-03-04 02:01:53,504 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 02:01:52" (2/3) ... [2025-03-04 02:01:53,505 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b8e07c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.03 02:01:53, skipping insertion in model container [2025-03-04 02:01:53,505 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 04.03 02:01:53" (3/3) ... [2025-03-04 02:01:53,506 INFO L128 eAbstractionObserver]: Analyzing ICFG twostage_3.i [2025-03-04 02:01:53,516 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-04 02:01:53,517 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG twostage_3.i that has 3 procedures, 46 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2025-03-04 02:01:53,517 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-04 02:01:53,567 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2025-03-04 02:01:53,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 53 transitions, 126 flow [2025-03-04 02:01:53,634 INFO L124 PetriNetUnfolderBase]: 12/103 cut-off events. [2025-03-04 02:01:53,636 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2025-03-04 02:01:53,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120 conditions, 103 events. 12/103 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 396 event pairs, 0 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 58. Up to 7 conditions per place. [2025-03-04 02:01:53,640 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 53 transitions, 126 flow [2025-03-04 02:01:53,643 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 51 transitions, 116 flow [2025-03-04 02:01:53,649 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-04 02:01:53,656 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;@67d3d4c6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-04 02:01:53,656 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2025-03-04 02:01:53,663 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-04 02:01:53,663 INFO L124 PetriNetUnfolderBase]: 0/23 cut-off events. [2025-03-04 02:01:53,663 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-04 02:01:53,663 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:01:53,666 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2025-03-04 02:01:53,667 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-04 02:01:53,671 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:01:53,672 INFO L85 PathProgramCache]: Analyzing trace with hash 114692197, now seen corresponding path program 1 times [2025-03-04 02:01:53,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:01:53,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094241502] [2025-03-04 02:01:53,679 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 02:01:53,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:01:53,750 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-04 02:01:53,806 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-04 02:01:53,808 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:01:53,808 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-04 02:01:53,808 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-03-04 02:01:53,817 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-04 02:01:53,833 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-04 02:01:53,834 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:01:53,834 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-04 02:01:53,860 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-03-04 02:01:53,862 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-03-04 02:01:53,863 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2025-03-04 02:01:53,864 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2025-03-04 02:01:53,865 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2025-03-04 02:01:53,865 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2025-03-04 02:01:53,866 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-04 02:01:53,866 INFO L422 BasicCegarLoop]: Path program histogram: [1] [2025-03-04 02:01:53,869 WARN L246 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2025-03-04 02:01:53,869 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2025-03-04 02:01:53,896 INFO L143 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2025-03-04 02:01:53,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 91 transitions, 226 flow [2025-03-04 02:01:53,985 INFO L124 PetriNetUnfolderBase]: 69/343 cut-off events. [2025-03-04 02:01:53,987 INFO L125 PetriNetUnfolderBase]: For 72/95 co-relation queries the response was YES. [2025-03-04 02:01:53,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 343 events. 69/343 cut-off events. For 72/95 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1930 event pairs, 1 based on Foata normal form. 0/262 useless extension candidates. Maximal degree in co-relation 226. Up to 32 conditions per place. [2025-03-04 02:01:53,990 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 91 transitions, 226 flow [2025-03-04 02:01:53,991 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 88 places, 91 transitions, 226 flow [2025-03-04 02:01:53,993 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-04 02:01:53,994 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;@67d3d4c6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-04 02:01:53,994 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2025-03-04 02:01:54,006 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-04 02:01:54,007 INFO L124 PetriNetUnfolderBase]: 0/59 cut-off events. [2025-03-04 02:01:54,007 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2025-03-04 02:01:54,007 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:01:54,007 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2025-03-04 02:01:54,007 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2025-03-04 02:01:54,008 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:01:54,008 INFO L85 PathProgramCache]: Analyzing trace with hash -809002766, now seen corresponding path program 1 times [2025-03-04 02:01:54,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:01:54,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664505860] [2025-03-04 02:01:54,008 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 02:01:54,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:01:54,030 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-04 02:01:54,072 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-04 02:01:54,073 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:01:54,073 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-04 02:01:54,073 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-03-04 02:01:54,077 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-04 02:01:54,093 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-04 02:01:54,094 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:01:54,094 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-04 02:01:54,100 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-03-04 02:01:54,100 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-03-04 02:01:54,100 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2025-03-04 02:01:54,100 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 5 remaining) [2025-03-04 02:01:54,100 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2025-03-04 02:01:54,100 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2025-03-04 02:01:54,101 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2025-03-04 02:01:54,101 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-04 02:01:54,101 INFO L422 BasicCegarLoop]: Path program histogram: [1] [2025-03-04 02:01:54,101 WARN L246 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2025-03-04 02:01:54,101 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2025-03-04 02:01:54,142 INFO L143 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2025-03-04 02:01:54,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 129 transitions, 330 flow [2025-03-04 02:01:54,289 INFO L124 PetriNetUnfolderBase]: 360/1109 cut-off events. [2025-03-04 02:01:54,289 INFO L125 PetriNetUnfolderBase]: For 419/495 co-relation queries the response was YES. [2025-03-04 02:01:54,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1545 conditions, 1109 events. 360/1109 cut-off events. For 419/495 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 7238 event pairs, 32 based on Foata normal form. 0/889 useless extension candidates. Maximal degree in co-relation 798. Up to 192 conditions per place. [2025-03-04 02:01:54,303 INFO L82 GeneralOperation]: Start removeDead. Operand has 124 places, 129 transitions, 330 flow [2025-03-04 02:01:54,310 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 124 places, 129 transitions, 330 flow [2025-03-04 02:01:54,313 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-04 02:01:54,313 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;@67d3d4c6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-04 02:01:54,313 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2025-03-04 02:01:54,326 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-04 02:01:54,327 INFO L124 PetriNetUnfolderBase]: 0/118 cut-off events. [2025-03-04 02:01:54,327 INFO L125 PetriNetUnfolderBase]: For 23/29 co-relation queries the response was YES. [2025-03-04 02:01:54,327 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:01:54,327 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2025-03-04 02:01:54,327 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-04 02:01:54,328 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:01:54,328 INFO L85 PathProgramCache]: Analyzing trace with hash -968794556, now seen corresponding path program 1 times [2025-03-04 02:01:54,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:01:54,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788671929] [2025-03-04 02:01:54,329 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 02:01:54,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:01:54,341 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-04 02:01:54,357 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-04 02:01:54,357 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:01:54,357 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-04 02:01:54,357 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-03-04 02:01:54,362 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-04 02:01:54,376 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-04 02:01:54,376 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:01:54,376 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-04 02:01:54,388 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-03-04 02:01:54,388 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-03-04 02:01:54,389 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2025-03-04 02:01:54,389 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2025-03-04 02:01:54,389 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2025-03-04 02:01:54,389 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2025-03-04 02:01:54,389 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2025-03-04 02:01:54,389 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2025-03-04 02:01:54,389 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-04 02:01:54,389 INFO L422 BasicCegarLoop]: Path program histogram: [1] [2025-03-04 02:01:54,392 WARN L246 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2025-03-04 02:01:54,393 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2025-03-04 02:01:54,446 INFO L143 ThreadInstanceAdder]: Constructed 16 joinOtherThreadTransitions. [2025-03-04 02:01:54,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 160 places, 167 transitions, 438 flow [2025-03-04 02:01:55,026 INFO L124 PetriNetUnfolderBase]: 1857/4129 cut-off events. [2025-03-04 02:01:55,027 INFO L125 PetriNetUnfolderBase]: For 2144/2316 co-relation queries the response was YES. [2025-03-04 02:01:55,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6270 conditions, 4129 events. 1857/4129 cut-off events. For 2144/2316 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 29281 event pairs, 313 based on Foata normal form. 0/3463 useless extension candidates. Maximal degree in co-relation 3061. Up to 1024 conditions per place. [2025-03-04 02:01:55,063 INFO L82 GeneralOperation]: Start removeDead. Operand has 160 places, 167 transitions, 438 flow [2025-03-04 02:01:55,095 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 160 places, 167 transitions, 438 flow [2025-03-04 02:01:55,096 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-04 02:01:55,098 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;@67d3d4c6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-04 02:01:55,098 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2025-03-04 02:01:55,112 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-04 02:01:55,113 INFO L124 PetriNetUnfolderBase]: 3/208 cut-off events. [2025-03-04 02:01:55,113 INFO L125 PetriNetUnfolderBase]: For 61/79 co-relation queries the response was YES. [2025-03-04 02:01:55,113 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:01:55,113 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2025-03-04 02:01:55,113 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2025-03-04 02:01:55,114 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:01:55,114 INFO L85 PathProgramCache]: Analyzing trace with hash -2146771467, now seen corresponding path program 1 times [2025-03-04 02:01:55,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:01:55,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681619342] [2025-03-04 02:01:55,114 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 02:01:55,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:01:55,131 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-04 02:01:55,148 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-04 02:01:55,148 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:01:55,149 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-04 02:01:55,149 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-03-04 02:01:55,152 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-04 02:01:55,163 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-04 02:01:55,164 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:01:55,164 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-04 02:01:55,170 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-03-04 02:01:55,170 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-03-04 02:01:55,171 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2025-03-04 02:01:55,171 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 7 remaining) [2025-03-04 02:01:55,171 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2025-03-04 02:01:55,171 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2025-03-04 02:01:55,171 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2025-03-04 02:01:55,171 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2025-03-04 02:01:55,171 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2025-03-04 02:01:55,171 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-04 02:01:55,171 INFO L422 BasicCegarLoop]: Path program histogram: [1] [2025-03-04 02:01:55,172 WARN L246 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2025-03-04 02:01:55,172 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2025-03-04 02:01:55,228 INFO L143 ThreadInstanceAdder]: Constructed 20 joinOtherThreadTransitions. [2025-03-04 02:01:55,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 196 places, 205 transitions, 550 flow [2025-03-04 02:01:57,164 INFO L124 PetriNetUnfolderBase]: 9312/17179 cut-off events. [2025-03-04 02:01:57,165 INFO L125 PetriNetUnfolderBase]: For 10450/10760 co-relation queries the response was YES. [2025-03-04 02:01:57,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27570 conditions, 17179 events. 9312/17179 cut-off events. For 10450/10760 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 131896 event pairs, 2148 based on Foata normal form. 0/14900 useless extension candidates. Maximal degree in co-relation 13066. Up to 5120 conditions per place. [2025-03-04 02:01:57,371 INFO L82 GeneralOperation]: Start removeDead. Operand has 196 places, 205 transitions, 550 flow [2025-03-04 02:01:57,707 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 196 places, 205 transitions, 550 flow [2025-03-04 02:01:57,712 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-04 02:01:57,713 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;@67d3d4c6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-04 02:01:57,713 INFO L334 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2025-03-04 02:01:57,741 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-04 02:01:57,741 INFO L124 PetriNetUnfolderBase]: 4/215 cut-off events. [2025-03-04 02:01:57,741 INFO L125 PetriNetUnfolderBase]: For 69/87 co-relation queries the response was YES. [2025-03-04 02:01:57,741 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 02:01:57,741 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 02:01:57,741 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting funcBErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2025-03-04 02:01:57,746 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 02:01:57,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1092795487, now seen corresponding path program 1 times [2025-03-04 02:01:57,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 02:01:57,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684471323] [2025-03-04 02:01:57,746 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 02:01:57,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 02:01:57,783 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-04 02:01:57,795 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-04 02:01:57,796 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 02:01:57,796 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 02:01:57,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 02:01:57,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 02:01:57,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684471323] [2025-03-04 02:01:57,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684471323] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 02:01:57,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 02:01:57,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-04 02:01:57,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994941112] [2025-03-04 02:01:57,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 02:01:57,913 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-04 02:01:57,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 02:01:57,951 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-04 02:01:57,952 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-04 02:01:57,992 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 205 [2025-03-04 02:01:57,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 205 transitions, 550 flow. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 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) [2025-03-04 02:01:57,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 02:01:57,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 205 [2025-03-04 02:01:57,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand