./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 4f9af400 extending candidate: java ['java'] extending candidate: /usr/bin/java ['java', '/usr/bin/java'] extending candidate: /opt/oracle-jdk-bin-*/bin/java ['java', '/usr/bin/java'] extending candidate: /opt/openjdk-*/bin/java ['java', '/usr/bin/java'] extending candidate: /usr/lib/jvm/java-*-openjdk-amd64/bin/java ['java', '/usr/bin/java', '/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java', '/usr/lib/jvm/java-17-openjdk-amd64/bin/java', '/usr/lib/jvm/java-11-openjdk-amd64/bin/java', '/usr/lib/jvm/java-1.17.0-openjdk-amd64/bin/java'] ['/root/.sdkman/candidates/java/21.0.5-tem/bin/java', '-Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config', '-Xmx15G', '-Xms4m', '-jar', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar', '-data', '@noDefault', '-ultimatedata', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data', '-tc', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml', '-i', '../sv-benchmarks/c/pthread/twostage_3.i', '-s', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf', '--cacsl2boogietranslator.entry.function', 'main', '--witnessprinter.witness.directory', '/storage/repos/ultimate-jdk21/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())) )\n\n', '--witnessprinter.graph.data.producer', 'Automizer', '--witnessprinter.graph.data.architecture', '32bit', '--witnessprinter.graph.data.programhash', '1032ef3fe166161226ca7e81ea27802cfc3f516ad1e4b45c387461fe1ddeccf8'] Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread/twostage_3.i -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/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-?-4f9af40 [2024-11-07 11:06:51,902 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-07 11:06:51,979 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-07 11:06:51,987 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-07 11:06:51,988 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-07 11:06:52,015 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-07 11:06:52,019 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-07 11:06:52,020 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-07 11:06:52,020 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-07 11:06:52,020 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-07 11:06:52,020 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-07 11:06:52,020 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-07 11:06:52,020 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-07 11:06:52,020 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-07 11:06:52,020 INFO L153 SettingsManager]: * Use SBE=true [2024-11-07 11:06:52,021 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-07 11:06:52,021 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-07 11:06:52,021 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-07 11:06:52,021 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-07 11:06:52,021 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-07 11:06:52,021 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-07 11:06:52,021 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-07 11:06:52,021 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-07 11:06:52,021 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-07 11:06:52,021 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-07 11:06:52,021 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-07 11:06:52,021 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-07 11:06:52,021 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-07 11:06:52,021 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-07 11:06:52,021 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-07 11:06:52,021 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-07 11:06:52,022 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-07 11:06:52,022 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-07 11:06:52,022 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-07 11:06:52,022 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-07 11:06:52,022 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-07 11:06:52,023 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-07 11:06:52,023 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-07 11:06:52,023 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-07 11:06:52,023 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-07 11:06:52,023 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-07 11:06:52,023 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-07 11:06:52,023 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-jdk21/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 [2024-11-07 11:06:52,315 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-07 11:06:52,323 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-07 11:06:52,325 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-07 11:06:52,327 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-07 11:06:52,328 INFO L274 PluginConnector]: CDTParser initialized [2024-11-07 11:06:52,329 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/twostage_3.i [2024-11-07 11:06:53,696 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-07 11:06:53,941 INFO L384 CDTParser]: Found 1 translation units. [2024-11-07 11:06:53,941 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/pthread/twostage_3.i [2024-11-07 11:06:53,961 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/8053b7e05/d5dc489a0188427eb53fabe6027bb67c/FLAGba143c4d8 [2024-11-07 11:06:53,975 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/8053b7e05/d5dc489a0188427eb53fabe6027bb67c [2024-11-07 11:06:53,977 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-07 11:06:53,978 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-07 11:06:53,979 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-07 11:06:53,979 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-07 11:06:53,982 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-07 11:06:53,983 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 11:06:53" (1/1) ... [2024-11-07 11:06:53,983 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38c6c3bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:06:53, skipping insertion in model container [2024-11-07 11:06:53,983 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 11:06:53" (1/1) ... [2024-11-07 11:06:54,020 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-07 11:06:54,355 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/pthread/twostage_3.i[59093,59106] [2024-11-07 11:06:54,368 WARN L1674 CHandler]: Possible shadowing of function lock [2024-11-07 11:06:54,369 WARN L1674 CHandler]: Possible shadowing of function lock [2024-11-07 11:06:54,369 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-07 11:06:54,375 INFO L200 MainTranslator]: Completed pre-run [2024-11-07 11:06:54,422 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/pthread/twostage_3.i[59093,59106] [2024-11-07 11:06:54,431 WARN L1674 CHandler]: Possible shadowing of function lock [2024-11-07 11:06:54,432 WARN L1674 CHandler]: Possible shadowing of function lock [2024-11-07 11:06:54,436 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-07 11:06:54,532 INFO L204 MainTranslator]: Completed translation [2024-11-07 11:06:54,533 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:06:54 WrapperNode [2024-11-07 11:06:54,533 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-07 11:06:54,533 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-07 11:06:54,533 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-07 11:06:54,533 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-07 11:06:54,538 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:06:54" (1/1) ... [2024-11-07 11:06:54,559 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:06:54" (1/1) ... [2024-11-07 11:06:54,579 INFO L138 Inliner]: procedures = 373, calls = 33, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 140 [2024-11-07 11:06:54,579 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-07 11:06:54,580 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-07 11:06:54,580 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-07 11:06:54,580 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-07 11:06:54,586 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:06:54" (1/1) ... [2024-11-07 11:06:54,586 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:06:54" (1/1) ... [2024-11-07 11:06:54,588 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:06:54" (1/1) ... [2024-11-07 11:06:54,597 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]. [2024-11-07 11:06:54,598 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:06:54" (1/1) ... [2024-11-07 11:06:54,598 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:06:54" (1/1) ... [2024-11-07 11:06:54,603 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:06:54" (1/1) ... [2024-11-07 11:06:54,606 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:06:54" (1/1) ... [2024-11-07 11:06:54,607 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:06:54" (1/1) ... [2024-11-07 11:06:54,608 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:06:54" (1/1) ... [2024-11-07 11:06:54,610 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-07 11:06:54,611 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-07 11:06:54,611 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-07 11:06:54,611 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-07 11:06:54,611 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:06:54" (1/1) ... [2024-11-07 11:06:54,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-07 11:06:54,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 11:06:54,647 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-07 11:06:54,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-07 11:06:54,665 INFO L130 BoogieDeclarations]: Found specification of procedure funcA [2024-11-07 11:06:54,665 INFO L138 BoogieDeclarations]: Found implementation of procedure funcA [2024-11-07 11:06:54,665 INFO L130 BoogieDeclarations]: Found specification of procedure funcB [2024-11-07 11:06:54,665 INFO L138 BoogieDeclarations]: Found implementation of procedure funcB [2024-11-07 11:06:54,665 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-07 11:06:54,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-07 11:06:54,665 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-07 11:06:54,665 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-07 11:06:54,666 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-07 11:06:54,666 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-07 11:06:54,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-07 11:06:54,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-07 11:06:54,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-07 11:06:54,666 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-07 11:06:54,666 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-07 11:06:54,666 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-07 11:06:54,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-07 11:06:54,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-07 11:06:54,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-07 11:06:54,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-07 11:06:54,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-07 11:06:54,668 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-07 11:06:54,793 INFO L238 CfgBuilder]: Building ICFG [2024-11-07 11:06:54,794 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-07 11:06:54,971 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-07 11:06:54,971 INFO L287 CfgBuilder]: Performing block encoding [2024-11-07 11:06:55,146 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-07 11:06:55,147 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-07 11:06:55,147 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 11:06:55 BoogieIcfgContainer [2024-11-07 11:06:55,147 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-07 11:06:55,149 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-07 11:06:55,149 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-07 11:06:55,153 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-07 11:06:55,153 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 11:06:53" (1/3) ... [2024-11-07 11:06:55,153 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56f7a529 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 11:06:55, skipping insertion in model container [2024-11-07 11:06:55,153 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:06:54" (2/3) ... [2024-11-07 11:06:55,153 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56f7a529 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 11:06:55, skipping insertion in model container [2024-11-07 11:06:55,153 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 11:06:55" (3/3) ... [2024-11-07 11:06:55,154 INFO L112 eAbstractionObserver]: Analyzing ICFG twostage_3.i [2024-11-07 11:06:55,164 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-07 11:06:55,165 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-07 11:06:55,165 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-07 11:06:55,244 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-07 11:06:55,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 53 transitions, 126 flow [2024-11-07 11:06:55,308 INFO L124 PetriNetUnfolderBase]: 12/103 cut-off events. [2024-11-07 11:06:55,310 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-07 11:06:55,312 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. [2024-11-07 11:06:55,316 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 53 transitions, 126 flow [2024-11-07 11:06:55,318 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 51 transitions, 116 flow [2024-11-07 11:06:55,326 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-07 11:06:55,343 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;@4d3d037, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-07 11:06:55,343 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-07 11:06:55,357 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-07 11:06:55,358 INFO L124 PetriNetUnfolderBase]: 0/18 cut-off events. [2024-11-07 11:06:55,358 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-07 11:06:55,358 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 11:06:55,358 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-07 11:06:55,358 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-07 11:06:55,365 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 11:06:55,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1448785008, now seen corresponding path program 1 times [2024-11-07 11:06:55,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 11:06:55,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042708143] [2024-11-07 11:06:55,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 11:06:55,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 11:06:55,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-07 11:06:55,537 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-07 11:06:55,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-07 11:06:55,591 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-07 11:06:55,592 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-07 11:06:55,593 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-11-07 11:06:55,594 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2024-11-07 11:06:55,596 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2024-11-07 11:06:55,596 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-11-07 11:06:55,596 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-07 11:06:55,596 INFO L407 BasicCegarLoop]: Path program histogram: [1] [2024-11-07 11:06:55,600 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-07 11:06:55,600 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-07 11:06:55,628 INFO L143 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2024-11-07 11:06:55,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 91 transitions, 226 flow [2024-11-07 11:06:55,670 INFO L124 PetriNetUnfolderBase]: 69/343 cut-off events. [2024-11-07 11:06:55,670 INFO L125 PetriNetUnfolderBase]: For 72/95 co-relation queries the response was YES. [2024-11-07 11:06:55,672 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 1952 event pairs, 2 based on Foata normal form. 0/262 useless extension candidates. Maximal degree in co-relation 226. Up to 32 conditions per place. [2024-11-07 11:06:55,672 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 91 transitions, 226 flow [2024-11-07 11:06:55,676 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 88 places, 91 transitions, 226 flow [2024-11-07 11:06:55,677 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-07 11:06:55,678 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;@4d3d037, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-07 11:06:55,678 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-11-07 11:06:55,688 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-07 11:06:55,688 INFO L124 PetriNetUnfolderBase]: 0/51 cut-off events. [2024-11-07 11:06:55,688 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-07 11:06:55,688 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 11:06:55,688 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2024-11-07 11:06:55,689 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-11-07 11:06:55,689 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 11:06:55,689 INFO L85 PathProgramCache]: Analyzing trace with hash 562010455, now seen corresponding path program 1 times [2024-11-07 11:06:55,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 11:06:55,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563840070] [2024-11-07 11:06:55,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 11:06:55,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 11:06:55,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-07 11:06:55,777 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-07 11:06:55,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-07 11:06:55,820 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-07 11:06:55,824 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-07 11:06:55,824 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-11-07 11:06:55,825 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 5 remaining) [2024-11-07 11:06:55,825 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-11-07 11:06:55,825 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-11-07 11:06:55,825 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-11-07 11:06:55,825 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-07 11:06:55,825 INFO L407 BasicCegarLoop]: Path program histogram: [1] [2024-11-07 11:06:55,826 WARN L244 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-07 11:06:55,826 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-07 11:06:55,871 INFO L143 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2024-11-07 11:06:55,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 129 transitions, 330 flow [2024-11-07 11:06:56,028 INFO L124 PetriNetUnfolderBase]: 360/1109 cut-off events. [2024-11-07 11:06:56,029 INFO L125 PetriNetUnfolderBase]: For 419/495 co-relation queries the response was YES. [2024-11-07 11:06:56,041 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 7279 event pairs, 64 based on Foata normal form. 0/889 useless extension candidates. Maximal degree in co-relation 798. Up to 192 conditions per place. [2024-11-07 11:06:56,042 INFO L82 GeneralOperation]: Start removeDead. Operand has 124 places, 129 transitions, 330 flow [2024-11-07 11:06:56,053 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 124 places, 129 transitions, 330 flow [2024-11-07 11:06:56,054 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-07 11:06:56,055 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;@4d3d037, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-07 11:06:56,055 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-11-07 11:06:56,067 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-07 11:06:56,067 INFO L124 PetriNetUnfolderBase]: 0/104 cut-off events. [2024-11-07 11:06:56,067 INFO L125 PetriNetUnfolderBase]: For 16/24 co-relation queries the response was YES. [2024-11-07 11:06:56,067 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 11:06:56,067 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2024-11-07 11:06:56,069 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-07 11:06:56,069 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 11:06:56,069 INFO L85 PathProgramCache]: Analyzing trace with hash 2042156847, now seen corresponding path program 1 times [2024-11-07 11:06:56,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 11:06:56,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656631460] [2024-11-07 11:06:56,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 11:06:56,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 11:06:56,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-07 11:06:56,131 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-07 11:06:56,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-07 11:06:56,164 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-07 11:06:56,164 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-07 11:06:56,164 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2024-11-07 11:06:56,165 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2024-11-07 11:06:56,165 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2024-11-07 11:06:56,165 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2024-11-07 11:06:56,165 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2024-11-07 11:06:56,165 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2024-11-07 11:06:56,165 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-07 11:06:56,165 INFO L407 BasicCegarLoop]: Path program histogram: [1] [2024-11-07 11:06:56,166 WARN L244 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-07 11:06:56,166 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-11-07 11:06:56,206 INFO L143 ThreadInstanceAdder]: Constructed 16 joinOtherThreadTransitions. [2024-11-07 11:06:56,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 160 places, 167 transitions, 438 flow [2024-11-07 11:06:56,745 INFO L124 PetriNetUnfolderBase]: 1857/4129 cut-off events. [2024-11-07 11:06:56,747 INFO L125 PetriNetUnfolderBase]: For 2144/2316 co-relation queries the response was YES. [2024-11-07 11:06:56,781 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 161. Compared 29604 event pairs, 626 based on Foata normal form. 0/3463 useless extension candidates. Maximal degree in co-relation 3061. Up to 1024 conditions per place. [2024-11-07 11:06:56,781 INFO L82 GeneralOperation]: Start removeDead. Operand has 160 places, 167 transitions, 438 flow [2024-11-07 11:06:56,808 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 160 places, 167 transitions, 438 flow [2024-11-07 11:06:56,808 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-07 11:06:56,809 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;@4d3d037, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-07 11:06:56,809 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-11-07 11:06:56,854 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-07 11:06:56,854 INFO L124 PetriNetUnfolderBase]: 0/183 cut-off events. [2024-11-07 11:06:56,854 INFO L125 PetriNetUnfolderBase]: For 45/69 co-relation queries the response was YES. [2024-11-07 11:06:56,854 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 11:06:56,854 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2024-11-07 11:06:56,855 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-11-07 11:06:56,855 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 11:06:56,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1009567898, now seen corresponding path program 1 times [2024-11-07 11:06:56,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 11:06:56,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564712209] [2024-11-07 11:06:56,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 11:06:56,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 11:06:56,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-07 11:06:56,904 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-07 11:06:56,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-07 11:06:56,942 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-07 11:06:56,942 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-07 11:06:56,942 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2024-11-07 11:06:56,942 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 7 remaining) [2024-11-07 11:06:56,943 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2024-11-07 11:06:56,943 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2024-11-07 11:06:56,943 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2024-11-07 11:06:56,943 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2024-11-07 11:06:56,943 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2024-11-07 11:06:56,945 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-07 11:06:56,945 INFO L407 BasicCegarLoop]: Path program histogram: [1] [2024-11-07 11:06:56,946 WARN L244 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-07 11:06:56,946 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2024-11-07 11:06:57,009 INFO L143 ThreadInstanceAdder]: Constructed 20 joinOtherThreadTransitions. [2024-11-07 11:06:57,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 196 places, 205 transitions, 550 flow [2024-11-07 11:06:59,509 INFO L124 PetriNetUnfolderBase]: 9312/17179 cut-off events. [2024-11-07 11:06:59,509 INFO L125 PetriNetUnfolderBase]: For 10450/10756 co-relation queries the response was YES. [2024-11-07 11:06:59,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27570 conditions, 17179 events. 9312/17179 cut-off events. For 10450/10756 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 134149 event pairs, 4296 based on Foata normal form. 0/14900 useless extension candidates. Maximal degree in co-relation 13066. Up to 5120 conditions per place. [2024-11-07 11:06:59,728 INFO L82 GeneralOperation]: Start removeDead. Operand has 196 places, 205 transitions, 550 flow [2024-11-07 11:06:59,876 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 196 places, 205 transitions, 550 flow [2024-11-07 11:06:59,878 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-07 11:06:59,878 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;@4d3d037, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-07 11:06:59,879 INFO L334 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-11-07 11:06:59,890 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-07 11:06:59,890 INFO L124 PetriNetUnfolderBase]: 8/252 cut-off events. [2024-11-07 11:06:59,890 INFO L125 PetriNetUnfolderBase]: For 88/160 co-relation queries the response was YES. [2024-11-07 11:06:59,890 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 11:06:59,890 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 11:06:59,890 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting funcBErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2024-11-07 11:06:59,890 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 11:06:59,891 INFO L85 PathProgramCache]: Analyzing trace with hash -30824602, now seen corresponding path program 1 times [2024-11-07 11:06:59,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 11:06:59,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196835520] [2024-11-07 11:06:59,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 11:06:59,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 11:06:59,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 11:07:00,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 11:07:00,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 11:07:00,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196835520] [2024-11-07 11:07:00,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196835520] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 11:07:00,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 11:07:00,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 11:07:00,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007931924] [2024-11-07 11:07:00,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 11:07:00,010 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 11:07:00,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 11:07:00,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 11:07:00,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 11:07:00,042 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 205 [2024-11-07 11:07:00,044 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) [2024-11-07 11:07:00,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 11:07:00,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 205 [2024-11-07 11:07:00,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand