./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-ext/28_buggy_simple_loop1_vf.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-ext/28_buggy_simple_loop1_vf.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', 'f7757e6e73d857d492b029f13f86cb5d550622238e5a2b483c58ab6fc3ffdeb1'] 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-ext/28_buggy_simple_loop1_vf.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 f7757e6e73d857d492b029f13f86cb5d550622238e5a2b483c58ab6fc3ffdeb1 --- Real Ultimate output --- This is Ultimate 0.3.0-?-4f9af40 [2024-11-07 11:08:13,843 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-07 11:08:13,929 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-07 11:08:13,938 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-07 11:08:13,938 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-07 11:08:13,971 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-07 11:08:13,975 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-07 11:08:13,975 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-07 11:08:13,975 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-07 11:08:13,975 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-07 11:08:13,976 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-07 11:08:13,976 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-07 11:08:13,976 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-07 11:08:13,976 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-07 11:08:13,976 INFO L153 SettingsManager]: * Use SBE=true [2024-11-07 11:08:13,976 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-07 11:08:13,976 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-07 11:08:13,976 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-07 11:08:13,977 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-07 11:08:13,977 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-07 11:08:13,977 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-07 11:08:13,977 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-07 11:08:13,977 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-07 11:08:13,977 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-07 11:08:13,977 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-07 11:08:13,977 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-07 11:08:13,977 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-07 11:08:13,977 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-07 11:08:13,977 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-07 11:08:13,977 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-07 11:08:13,977 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-07 11:08:13,977 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-07 11:08:13,978 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-07 11:08:13,978 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-07 11:08:13,978 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-07 11:08:13,978 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-07 11:08:13,978 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-07 11:08:13,978 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-07 11:08:13,978 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-07 11:08:13,978 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-07 11:08:13,978 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-07 11:08:13,978 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-07 11:08:13,978 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 -> f7757e6e73d857d492b029f13f86cb5d550622238e5a2b483c58ab6fc3ffdeb1 [2024-11-07 11:08:14,282 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-07 11:08:14,293 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-07 11:08:14,297 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-07 11:08:14,298 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-07 11:08:14,298 INFO L274 PluginConnector]: CDTParser initialized [2024-11-07 11:08:14,299 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/28_buggy_simple_loop1_vf.i [2024-11-07 11:08:15,709 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-07 11:08:16,056 INFO L384 CDTParser]: Found 1 translation units. [2024-11-07 11:08:16,061 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/pthread-ext/28_buggy_simple_loop1_vf.i [2024-11-07 11:08:16,077 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/3da41dbb1/f8d81668a39c4d64a04944d9252f8511/FLAG55d8c1d5d [2024-11-07 11:08:16,278 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/3da41dbb1/f8d81668a39c4d64a04944d9252f8511 [2024-11-07 11:08:16,280 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-07 11:08:16,281 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-07 11:08:16,283 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-07 11:08:16,283 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-07 11:08:16,286 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-07 11:08:16,286 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 11:08:16" (1/1) ... [2024-11-07 11:08:16,287 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f6f3de3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:08:16, skipping insertion in model container [2024-11-07 11:08:16,287 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 11:08:16" (1/1) ... [2024-11-07 11:08:16,312 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-07 11:08:16,577 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-ext/28_buggy_simple_loop1_vf.i[30287,30300] [2024-11-07 11:08:16,584 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-07 11:08:16,591 INFO L200 MainTranslator]: Completed pre-run [2024-11-07 11:08:16,630 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-ext/28_buggy_simple_loop1_vf.i[30287,30300] [2024-11-07 11:08:16,632 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-07 11:08:16,671 INFO L204 MainTranslator]: Completed translation [2024-11-07 11:08:16,672 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:08:16 WrapperNode [2024-11-07 11:08:16,672 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-07 11:08:16,673 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-07 11:08:16,674 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-07 11:08:16,674 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-07 11:08:16,679 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:08:16" (1/1) ... [2024-11-07 11:08:16,692 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:08:16" (1/1) ... [2024-11-07 11:08:16,712 INFO L138 Inliner]: procedures = 166, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 19 [2024-11-07 11:08:16,713 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-07 11:08:16,713 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-07 11:08:16,714 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-07 11:08:16,714 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-07 11:08:16,721 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:08:16" (1/1) ... [2024-11-07 11:08:16,721 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:08:16" (1/1) ... [2024-11-07 11:08:16,725 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:08:16" (1/1) ... [2024-11-07 11:08:16,740 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-07 11:08:16,740 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:08:16" (1/1) ... [2024-11-07 11:08:16,741 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:08:16" (1/1) ... [2024-11-07 11:08:16,745 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:08:16" (1/1) ... [2024-11-07 11:08:16,748 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:08:16" (1/1) ... [2024-11-07 11:08:16,749 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:08:16" (1/1) ... [2024-11-07 11:08:16,750 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:08:16" (1/1) ... [2024-11-07 11:08:16,751 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-07 11:08:16,752 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-07 11:08:16,752 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-07 11:08:16,752 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-07 11:08:16,753 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:08:16" (1/1) ... [2024-11-07 11:08:16,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-07 11:08:16,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 11:08:16,784 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 11:08:16,791 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 11:08:16,809 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-11-07 11:08:16,810 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-11-07 11:08:16,810 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-07 11:08:16,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-07 11:08:16,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-07 11:08:16,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-07 11:08:16,811 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 11:08:16,905 INFO L238 CfgBuilder]: Building ICFG [2024-11-07 11:08:16,906 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-07 11:08:17,021 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-07 11:08:17,022 INFO L287 CfgBuilder]: Performing block encoding [2024-11-07 11:08:17,117 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-07 11:08:17,118 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-07 11:08:17,118 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 11:08:17 BoogieIcfgContainer [2024-11-07 11:08:17,119 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-07 11:08:17,121 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-07 11:08:17,121 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-07 11:08:17,126 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-07 11:08:17,127 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 11:08:16" (1/3) ... [2024-11-07 11:08:17,127 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@214aab1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 11:08:17, skipping insertion in model container [2024-11-07 11:08:17,127 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 11:08:16" (2/3) ... [2024-11-07 11:08:17,128 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@214aab1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 11:08:17, skipping insertion in model container [2024-11-07 11:08:17,128 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 11:08:17" (3/3) ... [2024-11-07 11:08:17,129 INFO L112 eAbstractionObserver]: Analyzing ICFG 28_buggy_simple_loop1_vf.i [2024-11-07 11:08:17,143 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-07 11:08:17,143 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-07 11:08:17,143 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-07 11:08:17,204 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-07 11:08:17,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 18 places, 20 transitions, 44 flow [2024-11-07 11:08:17,272 INFO L124 PetriNetUnfolderBase]: 5/22 cut-off events. [2024-11-07 11:08:17,277 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-07 11:08:17,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26 conditions, 22 events. 5/22 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 39 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 17. Up to 2 conditions per place. [2024-11-07 11:08:17,282 INFO L82 GeneralOperation]: Start removeDead. Operand has 18 places, 20 transitions, 44 flow [2024-11-07 11:08:17,284 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 18 places, 20 transitions, 44 flow [2024-11-07 11:08:17,292 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-07 11:08:17,306 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;@876d357, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-07 11:08:17,306 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-07 11:08:17,318 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-07 11:08:17,321 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2024-11-07 11:08:17,321 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-07 11:08:17,321 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 11:08:17,322 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-07 11:08:17,322 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-07 11:08:17,327 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 11:08:17,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1470737087, now seen corresponding path program 1 times [2024-11-07 11:08:17,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 11:08:17,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779659933] [2024-11-07 11:08:17,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 11:08:17,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 11:08:17,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-07 11:08:17,423 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-07 11:08:17,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-07 11:08:17,460 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-07 11:08:17,462 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-07 11:08:17,463 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2024-11-07 11:08:17,466 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2024-11-07 11:08:17,466 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2024-11-07 11:08:17,467 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-07 11:08:17,467 INFO L407 BasicCegarLoop]: Path program histogram: [1] [2024-11-07 11:08:17,474 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-07 11:08:17,474 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-07 11:08:17,511 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-07 11:08:17,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 30 places, 35 transitions, 80 flow [2024-11-07 11:08:17,534 INFO L124 PetriNetUnfolderBase]: 10/40 cut-off events. [2024-11-07 11:08:17,535 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-07 11:08:17,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 40 events. 10/40 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 82 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 31. Up to 3 conditions per place. [2024-11-07 11:08:17,536 INFO L82 GeneralOperation]: Start removeDead. Operand has 30 places, 35 transitions, 80 flow [2024-11-07 11:08:17,536 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 35 transitions, 80 flow [2024-11-07 11:08:17,538 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-07 11:08:17,542 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;@876d357, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-07 11:08:17,543 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-07 11:08:17,551 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-07 11:08:17,552 INFO L124 PetriNetUnfolderBase]: 5/22 cut-off events. [2024-11-07 11:08:17,552 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-07 11:08:17,552 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 11:08:17,552 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-07 11:08:17,552 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-11-07 11:08:17,553 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 11:08:17,553 INFO L85 PathProgramCache]: Analyzing trace with hash 395068404, now seen corresponding path program 1 times [2024-11-07 11:08:17,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 11:08:17,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29404379] [2024-11-07 11:08:17,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 11:08:17,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 11:08:17,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-07 11:08:17,609 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-07 11:08:17,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-07 11:08:17,645 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-07 11:08:17,646 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-07 11:08:17,646 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2024-11-07 11:08:17,646 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2024-11-07 11:08:17,646 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-11-07 11:08:17,646 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-11-07 11:08:17,646 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-07 11:08:17,647 INFO L407 BasicCegarLoop]: Path program histogram: [1] [2024-11-07 11:08:17,670 INFO L239 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2024-11-07 11:08:17,670 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-07 11:08:17,679 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 11:08:17 BasicIcfg [2024-11-07 11:08:17,680 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-07 11:08:17,680 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-07 11:08:17,680 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-07 11:08:17,680 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-07 11:08:17,683 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 11:08:17" (3/4) ... [2024-11-07 11:08:17,683 INFO L136 WitnessPrinter]: Generating witness for reachability counterexample [2024-11-07 11:08:17,718 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/witness.graphml [2024-11-07 11:08:17,718 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-07 11:08:17,720 INFO L158 Benchmark]: Toolchain (without parser) took 1437.87ms. Allocated memory is still 100.7MB. Free memory was 75.2MB in the beginning and 39.8MB in the end (delta: 35.4MB). Peak memory consumption was 37.5MB. Max. memory is 16.1GB. [2024-11-07 11:08:17,721 INFO L158 Benchmark]: CDTParser took 0.80ms. Allocated memory is still 83.9MB. Free memory is still 48.0MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-07 11:08:17,721 INFO L158 Benchmark]: CACSL2BoogieTranslator took 390.18ms. Allocated memory is still 100.7MB. Free memory was 75.0MB in the beginning and 55.8MB in the end (delta: 19.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-07 11:08:17,721 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.52ms. Allocated memory is still 100.7MB. Free memory was 55.8MB in the beginning and 54.3MB in the end (delta: 1.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-07 11:08:17,721 INFO L158 Benchmark]: Boogie Preprocessor took 37.49ms. Allocated memory is still 100.7MB. Free memory was 54.3MB in the beginning and 53.0MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-07 11:08:17,722 INFO L158 Benchmark]: RCFGBuilder took 367.07ms. Allocated memory is still 100.7MB. Free memory was 52.8MB in the beginning and 74.0MB in the end (delta: -21.2MB). Peak memory consumption was 20.7MB. Max. memory is 16.1GB. [2024-11-07 11:08:17,722 INFO L158 Benchmark]: TraceAbstraction took 558.54ms. Allocated memory is still 100.7MB. Free memory was 73.5MB in the beginning and 42.1MB in the end (delta: 31.5MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. [2024-11-07 11:08:17,722 INFO L158 Benchmark]: Witness Printer took 38.23ms. Allocated memory is still 100.7MB. Free memory was 42.1MB in the beginning and 39.8MB in the end (delta: 2.3MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-07 11:08:17,723 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.80ms. Allocated memory is still 83.9MB. Free memory is still 48.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 390.18ms. Allocated memory is still 100.7MB. Free memory was 75.0MB in the beginning and 55.8MB in the end (delta: 19.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 39.52ms. Allocated memory is still 100.7MB. Free memory was 55.8MB in the beginning and 54.3MB in the end (delta: 1.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 37.49ms. Allocated memory is still 100.7MB. Free memory was 54.3MB in the beginning and 53.0MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 367.07ms. Allocated memory is still 100.7MB. Free memory was 52.8MB in the beginning and 74.0MB in the end (delta: -21.2MB). Peak memory consumption was 20.7MB. Max. memory is 16.1GB. * TraceAbstraction took 558.54ms. Allocated memory is still 100.7MB. Free memory was 73.5MB in the beginning and 42.1MB in the end (delta: 31.5MB). Peak memory consumption was 33.6MB. Max. memory is 16.1GB. * Witness Printer took 38.23ms. Allocated memory is still 100.7MB. Free memory was 42.1MB in the beginning and 39.8MB in the end (delta: 2.3MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 695]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L700] 0 pthread_t t; [L701] COND TRUE 0 1 [L703] FCALL, FORK 0 pthread_create(&t, 0, thr1, 0) VAL [\old(arg)={0:0}, t=-1] [L686] 1 unsigned int x=__VERIFIER_nondet_uint(), y=__VERIFIER_nondet_uint(), z=__VERIFIER_nondet_uint(); [L686] 1 unsigned int x=__VERIFIER_nondet_uint(), y=__VERIFIER_nondet_uint(), z=__VERIFIER_nondet_uint(); [L686] 1 unsigned int x=__VERIFIER_nondet_uint(), y=__VERIFIER_nondet_uint(), z=__VERIFIER_nondet_uint(); [L687] 1 int i, j=1, k=1; [L688] 1 i=0 VAL [\old(arg)={0:0}, arg={0:0}, i=0, j=1, k=1] [L688] COND FALSE 1 !(i