./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/fib_unsafe-7.i --traceabstraction.use.conditional.por.in.concurrent.analysis true --traceabstraction.commutativity.condition.synthesis NONE --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ebd41074 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/config/GemCutterReach.xml -i ../../../trunk/examples/svcomp/pthread/fib_unsafe-7.i -s /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/config/svcomp-Reach-32bit-GemCutter_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-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 GemCutter --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7399a2144dae504b22d3bd9a68ebd91d200de1e145cd9c7db720353ffec7d306 --traceabstraction.use.conditional.por.in.concurrent.analysis true --traceabstraction.commutativity.condition.synthesis NONE --- Real Ultimate output --- This is Ultimate 0.3.0-dev-ebd4107-m [2025-01-23 07:14:07,161 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-23 07:14:07,242 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/config/svcomp-Reach-32bit-GemCutter_Default.epf [2025-01-23 07:14:07,247 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-23 07:14:07,247 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-23 07:14:07,261 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-23 07:14:07,261 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-23 07:14:07,262 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-23 07:14:07,262 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-23 07:14:07,262 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-23 07:14:07,262 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-23 07:14:07,262 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-23 07:14:07,262 INFO L153 SettingsManager]: * Use SBE=true [2025-01-23 07:14:07,262 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-23 07:14:07,263 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-01-23 07:14:07,263 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-23 07:14:07,263 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-23 07:14:07,263 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-23 07:14:07,263 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-23 07:14:07,263 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-01-23 07:14:07,263 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-23 07:14:07,263 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-01-23 07:14:07,263 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-23 07:14:07,263 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-01-23 07:14:07,263 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-23 07:14:07,264 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-23 07:14:07,264 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-23 07:14:07,264 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-23 07:14:07,264 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-23 07:14:07,264 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-23 07:14:07,264 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2025-01-23 07:14:07,264 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-23 07:14:07,264 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-23 07:14:07,264 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-01-23 07:14:07,264 INFO L153 SettingsManager]: * Commutativity condition synthesis=NECESSARY_AND_SUFFICIENT [2025-01-23 07:14:07,265 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-01-23 07:14:07,265 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-23 07:14:07,265 INFO L153 SettingsManager]: * DFS Order used in POR=LOOP_LOCKSTEP [2025-01-23 07:14:07,265 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-23 07:14:07,265 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-23 07:14:07,265 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PARTIAL_ORDER_FA [2025-01-23 07:14:07,265 INFO L153 SettingsManager]: * CEGAR restart behaviour=ONE_CEGAR_PER_THREAD_INSTANCE [2025-01-23 07:14:07,265 INFO L153 SettingsManager]: * Partial Order Reduction in concurrent analysis=PERSISTENT_SLEEP_NEW_STATES_FIXEDORDER [2025-01-23 07:14:07,265 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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/UGemCutter-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 -> GemCutter 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 -> 7399a2144dae504b22d3bd9a68ebd91d200de1e145cd9c7db720353ffec7d306 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use conditional POR in concurrent analysis -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Commutativity condition synthesis -> NONE [2025-01-23 07:14:07,522 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-23 07:14:07,526 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-23 07:14:07,528 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-23 07:14:07,529 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-23 07:14:07,530 INFO L274 PluginConnector]: CDTParser initialized [2025-01-23 07:14:07,530 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/../../../trunk/examples/svcomp/pthread/fib_unsafe-7.i [2025-01-23 07:14:08,645 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/data/ee5b585c9/d4eb560dffe1476aaad1f1600967e6c1/FLAG4219463da [2025-01-23 07:14:08,857 INFO L384 CDTParser]: Found 1 translation units. [2025-01-23 07:14:08,859 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/trunk/examples/svcomp/pthread/fib_unsafe-7.i [2025-01-23 07:14:08,869 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/data/ee5b585c9/d4eb560dffe1476aaad1f1600967e6c1/FLAG4219463da [2025-01-23 07:14:09,203 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/data/ee5b585c9/d4eb560dffe1476aaad1f1600967e6c1 [2025-01-23 07:14:09,204 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-23 07:14:09,205 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-23 07:14:09,206 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-23 07:14:09,206 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-23 07:14:09,208 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-23 07:14:09,209 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.01 07:14:09" (1/1) ... [2025-01-23 07:14:09,209 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b0ce33c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 07:14:09, skipping insertion in model container [2025-01-23 07:14:09,209 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.01 07:14:09" (1/1) ... [2025-01-23 07:14:09,237 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-23 07:14:09,392 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/trunk/examples/svcomp/pthread/fib_unsafe-7.i[30243,30256] [2025-01-23 07:14:09,408 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-23 07:14:09,415 INFO L200 MainTranslator]: Completed pre-run [2025-01-23 07:14:09,481 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/trunk/examples/svcomp/pthread/fib_unsafe-7.i[30243,30256] [2025-01-23 07:14:09,488 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-23 07:14:09,514 INFO L204 MainTranslator]: Completed translation [2025-01-23 07:14:09,514 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 07:14:09 WrapperNode [2025-01-23 07:14:09,514 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-23 07:14:09,515 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-23 07:14:09,515 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-23 07:14:09,515 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-23 07:14:09,520 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 07:14:09" (1/1) ... [2025-01-23 07:14:09,526 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 07:14:09" (1/1) ... [2025-01-23 07:14:09,540 INFO L138 Inliner]: procedures = 164, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 63 [2025-01-23 07:14:09,540 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-23 07:14:09,541 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-23 07:14:09,541 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-23 07:14:09,541 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-23 07:14:09,545 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 07:14:09" (1/1) ... [2025-01-23 07:14:09,545 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 07:14:09" (1/1) ... [2025-01-23 07:14:09,547 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 07:14:09" (1/1) ... [2025-01-23 07:14:09,547 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 07:14:09" (1/1) ... [2025-01-23 07:14:09,550 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 07:14:09" (1/1) ... [2025-01-23 07:14:09,550 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 07:14:09" (1/1) ... [2025-01-23 07:14:09,552 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 07:14:09" (1/1) ... [2025-01-23 07:14:09,553 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 07:14:09" (1/1) ... [2025-01-23 07:14:09,553 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 07:14:09" (1/1) ... [2025-01-23 07:14:09,554 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-23 07:14:09,555 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-23 07:14:09,555 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-23 07:14:09,555 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-23 07:14:09,556 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 07:14:09" (1/1) ... [2025-01-23 07:14:09,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2025-01-23 07:14:09,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 [2025-01-23 07:14:09,578 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2025-01-23 07:14:09,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2025-01-23 07:14:09,594 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2025-01-23 07:14:09,594 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2025-01-23 07:14:09,594 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2025-01-23 07:14:09,594 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2025-01-23 07:14:09,594 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-01-23 07:14:09,594 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-23 07:14:09,594 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2025-01-23 07:14:09,594 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-01-23 07:14:09,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-23 07:14:09,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-23 07:14:09,595 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-01-23 07:14:09,667 INFO L234 CfgBuilder]: Building ICFG [2025-01-23 07:14:09,668 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-23 07:14:09,763 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-01-23 07:14:09,763 INFO L283 CfgBuilder]: Performing block encoding [2025-01-23 07:14:09,846 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-23 07:14:09,846 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-01-23 07:14:09,846 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.01 07:14:09 BoogieIcfgContainer [2025-01-23 07:14:09,847 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-23 07:14:09,849 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-23 07:14:09,849 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-23 07:14:09,852 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-23 07:14:09,853 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.01 07:14:09" (1/3) ... [2025-01-23 07:14:09,854 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b50cb3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.01 07:14:09, skipping insertion in model container [2025-01-23 07:14:09,854 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.01 07:14:09" (2/3) ... [2025-01-23 07:14:09,855 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b50cb3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.01 07:14:09, skipping insertion in model container [2025-01-23 07:14:09,855 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.01 07:14:09" (3/3) ... [2025-01-23 07:14:09,856 INFO L128 eAbstractionObserver]: Analyzing ICFG fib_unsafe-7.i [2025-01-23 07:14:09,865 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-23 07:14:09,866 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fib_unsafe-7.i that has 3 procedures, 26 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-01-23 07:14:09,866 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-01-23 07:14:09,897 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-01-23 07:14:09,926 INFO L125 denceProviderFactory]: Independence Relation #1: [IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=true, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-23 07:14:09,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2025-01-23 07:14:09,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 [2025-01-23 07:14:09,928 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2025-01-23 07:14:09,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (2)] Waiting until timeout for monitored process [2025-01-23 07:14:09,995 INFO L177 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations. [2025-01-23 07:14:10,004 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2025-01-23 07:14:10,011 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=PARTIAL_ORDER_FA, 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;@7931c3ee, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-23 07:14:10,011 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-01-23 07:14:10,264 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-23 07:14:10,267 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-23 07:14:10,268 INFO L85 PathProgramCache]: Analyzing trace with hash -585029914, now seen corresponding path program 1 times [2025-01-23 07:14:10,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-23 07:14:10,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162871920] [2025-01-23 07:14:10,273 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-23 07:14:10,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-23 07:14:10,329 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-01-23 07:14:10,344 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-01-23 07:14:10,344 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-23 07:14:10,344 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-23 07:14:10,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-23 07:14:10,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-23 07:14:10,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162871920] [2025-01-23 07:14:10,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162871920] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-23 07:14:10,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-23 07:14:10,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-23 07:14:10,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284315681] [2025-01-23 07:14:10,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-23 07:14:10,455 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-23 07:14:10,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-23 07:14:10,468 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-23 07:14:10,469 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-23 07:14:10,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-01-23 07:14:10,471 INFO L471 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2025-01-23 07:14:10,473 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 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) [2025-01-23 07:14:10,473 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2025-01-23 07:14:10,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-23 07:14:10,516 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-01-23 07:14:10,517 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-23 07:14:10,517 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-23 07:14:10,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1099917870, now seen corresponding path program 1 times [2025-01-23 07:14:10,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-23 07:14:10,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518151918] [2025-01-23 07:14:10,517 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-23 07:14:10,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-23 07:14:10,528 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-01-23 07:14:10,544 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-01-23 07:14:10,544 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-23 07:14:10,544 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-23 07:14:10,622 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-23 07:14:10,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-23 07:14:10,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518151918] [2025-01-23 07:14:10,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518151918] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-23 07:14:10,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723230102] [2025-01-23 07:14:10,622 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-23 07:14:10,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-23 07:14:10,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 [2025-01-23 07:14:10,624 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-23 07:14:10,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-01-23 07:14:10,669 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-01-23 07:14:10,683 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-01-23 07:14:10,683 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-23 07:14:10,683 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-23 07:14:10,684 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-01-23 07:14:10,687 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-23 07:14:10,724 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-23 07:14:10,724 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-23 07:14:10,753 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-23 07:14:10,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723230102] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-23 07:14:10,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-23 07:14:10,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-01-23 07:14:10,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641417281] [2025-01-23 07:14:10,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-23 07:14:10,754 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-01-23 07:14:10,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-23 07:14:10,754 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-01-23 07:14:10,754 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-01-23 07:14:10,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-01-23 07:14:10,754 INFO L471 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2025-01-23 07:14:10,755 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 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) [2025-01-23 07:14:10,755 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2025-01-23 07:14:10,755 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2025-01-23 07:14:10,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-23 07:14:10,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-23 07:14:10,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-01-23 07:14:11,028 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-23 07:14:11,028 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-23 07:14:11,029 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-23 07:14:11,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1414699802, now seen corresponding path program 2 times [2025-01-23 07:14:11,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-23 07:14:11,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155752620] [2025-01-23 07:14:11,029 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-23 07:14:11,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-23 07:14:11,040 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 49 statements into 2 equivalence classes. [2025-01-23 07:14:11,062 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 49 of 49 statements. [2025-01-23 07:14:11,062 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-23 07:14:11,062 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-23 07:14:11,189 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-23 07:14:11,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-23 07:14:11,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155752620] [2025-01-23 07:14:11,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155752620] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-23 07:14:11,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846701958] [2025-01-23 07:14:11,190 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-23 07:14:11,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-23 07:14:11,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 [2025-01-23 07:14:11,193 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-23 07:14:11,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-01-23 07:14:11,239 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 49 statements into 2 equivalence classes. [2025-01-23 07:14:11,262 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 49 of 49 statements. [2025-01-23 07:14:11,262 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-23 07:14:11,262 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-23 07:14:11,263 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-01-23 07:14:11,264 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-23 07:14:11,321 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-23 07:14:11,321 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-23 07:14:11,402 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-23 07:14:11,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846701958] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-23 07:14:11,403 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-23 07:14:11,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2025-01-23 07:14:11,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248640316] [2025-01-23 07:14:11,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-23 07:14:11,403 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-01-23 07:14:11,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-23 07:14:11,403 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-01-23 07:14:11,404 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-01-23 07:14:11,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-01-23 07:14:11,404 INFO L471 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2025-01-23 07:14:11,404 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.153846153846154) internal successors, (93), 13 states have internal predecessors, (93), 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) [2025-01-23 07:14:11,404 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2025-01-23 07:14:11,404 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2025-01-23 07:14:11,404 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2025-01-23 07:14:11,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-23 07:14:11,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-23 07:14:11,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-01-23 07:14:11,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-01-23 07:14:11,701 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-23 07:14:11,701 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-23 07:14:11,702 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-23 07:14:11,702 INFO L85 PathProgramCache]: Analyzing trace with hash 286974438, now seen corresponding path program 3 times [2025-01-23 07:14:11,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-23 07:14:11,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789405271] [2025-01-23 07:14:11,702 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-23 07:14:11,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-23 07:14:11,713 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 91 statements into 11 equivalence classes. [2025-01-23 07:14:11,798 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) and asserted 91 of 91 statements. [2025-01-23 07:14:11,799 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2025-01-23 07:14:11,799 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-23 07:14:12,065 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-23 07:14:12,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-23 07:14:12,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789405271] [2025-01-23 07:14:12,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789405271] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-23 07:14:12,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797204930] [2025-01-23 07:14:12,066 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-23 07:14:12,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-23 07:14:12,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 [2025-01-23 07:14:12,069 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-23 07:14:12,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-01-23 07:14:12,116 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 91 statements into 11 equivalence classes. [2025-01-23 07:14:12,149 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) and asserted 91 of 91 statements. [2025-01-23 07:14:12,149 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2025-01-23 07:14:12,149 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-23 07:14:12,150 INFO L256 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-01-23 07:14:12,152 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-23 07:14:12,357 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 385 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-23 07:14:12,359 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-23 07:14:12,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797204930] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-23 07:14:12,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-01-23 07:14:12,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 24 [2025-01-23 07:14:12,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500523641] [2025-01-23 07:14:12,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-23 07:14:12,359 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-01-23 07:14:12,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-23 07:14:12,360 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-01-23 07:14:12,360 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2025-01-23 07:14:12,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-01-23 07:14:12,360 INFO L471 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2025-01-23 07:14:12,360 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.0) internal successors, (91), 13 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-23 07:14:12,360 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2025-01-23 07:14:12,360 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2025-01-23 07:14:12,361 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 12 states. [2025-01-23 07:14:12,361 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2025-01-23 07:14:12,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-23 07:14:12,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-23 07:14:12,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-01-23 07:14:12,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-01-23 07:14:12,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-01-23 07:14:12,695 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-23 07:14:12,695 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-23 07:14:12,695 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-23 07:14:12,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1035882749, now seen corresponding path program 1 times [2025-01-23 07:14:12,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-23 07:14:12,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764805351] [2025-01-23 07:14:12,695 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-23 07:14:12,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-23 07:14:12,702 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 80 statements into 1 equivalence classes. [2025-01-23 07:14:12,714 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 80 of 80 statements. [2025-01-23 07:14:12,714 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-23 07:14:12,714 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-23 07:14:12,887 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 0 proven. 178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-23 07:14:12,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-23 07:14:12,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764805351] [2025-01-23 07:14:12,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764805351] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-23 07:14:12,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099373542] [2025-01-23 07:14:12,888 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-23 07:14:12,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-23 07:14:12,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 [2025-01-23 07:14:12,890 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-23 07:14:12,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-01-23 07:14:12,926 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 80 statements into 1 equivalence classes. [2025-01-23 07:14:12,950 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 80 of 80 statements. [2025-01-23 07:14:12,950 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-23 07:14:12,950 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-23 07:14:12,951 INFO L256 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-01-23 07:14:12,953 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-23 07:14:13,068 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 157 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-01-23 07:14:13,069 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-23 07:14:13,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099373542] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-23 07:14:13,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-01-23 07:14:13,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [13] total 21 [2025-01-23 07:14:13,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684692427] [2025-01-23 07:14:13,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-23 07:14:13,069 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-01-23 07:14:13,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-23 07:14:13,070 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-01-23 07:14:13,070 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2025-01-23 07:14:13,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-01-23 07:14:13,070 INFO L471 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2025-01-23 07:14:13,070 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 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) [2025-01-23 07:14:13,070 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2025-01-23 07:14:13,070 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2025-01-23 07:14:13,070 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 12 states. [2025-01-23 07:14:13,070 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 10 states. [2025-01-23 07:14:13,070 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2025-01-23 07:14:13,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-23 07:14:13,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-23 07:14:13,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-01-23 07:14:13,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-01-23 07:14:13,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-01-23 07:14:13,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-01-23 07:14:13,360 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-23 07:14:13,360 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-23 07:14:13,360 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-23 07:14:13,361 INFO L85 PathProgramCache]: Analyzing trace with hash 317542987, now seen corresponding path program 1 times [2025-01-23 07:14:13,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-23 07:14:13,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911503015] [2025-01-23 07:14:13,361 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-23 07:14:13,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-23 07:14:13,366 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 69 statements into 1 equivalence classes. [2025-01-23 07:14:13,372 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 69 of 69 statements. [2025-01-23 07:14:13,372 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-23 07:14:13,372 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-23 07:14:13,530 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-23 07:14:13,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-23 07:14:13,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911503015] [2025-01-23 07:14:13,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911503015] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-23 07:14:13,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690915766] [2025-01-23 07:14:13,533 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-23 07:14:13,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-23 07:14:13,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 [2025-01-23 07:14:13,535 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-23 07:14:13,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-01-23 07:14:13,572 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 69 statements into 1 equivalence classes. [2025-01-23 07:14:13,596 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 69 of 69 statements. [2025-01-23 07:14:13,596 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-23 07:14:13,597 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-23 07:14:13,598 INFO L256 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-01-23 07:14:13,600 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-23 07:14:13,669 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-23 07:14:13,670 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-23 07:14:13,811 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-23 07:14:13,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690915766] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-23 07:14:13,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-23 07:14:13,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2025-01-23 07:14:13,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727646118] [2025-01-23 07:14:13,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-23 07:14:13,812 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-01-23 07:14:13,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-23 07:14:13,814 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-01-23 07:14:13,814 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2025-01-23 07:14:13,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-01-23 07:14:13,814 INFO L471 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2025-01-23 07:14:13,814 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.105263157894737) internal successors, (116), 19 states have internal predecessors, (116), 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) [2025-01-23 07:14:13,814 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2025-01-23 07:14:13,814 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2025-01-23 07:14:13,814 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 12 states. [2025-01-23 07:14:13,814 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 10 states. [2025-01-23 07:14:13,814 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 10 states. [2025-01-23 07:14:13,815 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2025-01-23 07:14:13,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-23 07:14:13,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-23 07:14:13,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-01-23 07:14:13,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-01-23 07:14:13,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-01-23 07:14:13,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-01-23 07:14:13,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-01-23 07:14:14,088 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2025-01-23 07:14:14,089 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-01-23 07:14:14,090 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-23 07:14:14,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1366143851, now seen corresponding path program 2 times [2025-01-23 07:14:14,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-23 07:14:14,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614909526] [2025-01-23 07:14:14,090 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-23 07:14:14,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-23 07:14:14,095 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 75 statements into 2 equivalence classes. [2025-01-23 07:14:14,107 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 75 of 75 statements. [2025-01-23 07:14:14,107 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-23 07:14:14,107 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-01-23 07:14:14,107 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-01-23 07:14:14,110 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 75 statements into 1 equivalence classes. [2025-01-23 07:14:14,120 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 75 of 75 statements. [2025-01-23 07:14:14,120 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-23 07:14:14,120 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-01-23 07:14:14,148 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-01-23 07:14:14,148 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-01-23 07:14:14,149 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2025-01-23 07:14:14,150 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2025-01-23 07:14:14,150 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2025-01-23 07:14:14,150 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-01-23 07:14:14,154 INFO L422 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1] [2025-01-23 07:14:14,264 INFO L241 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-01-23 07:14:14,264 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-01-23 07:14:14,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (2)] Forceful destruction successful, exit code 0 [2025-01-23 07:14:14,277 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.01 07:14:14 BasicIcfg [2025-01-23 07:14:14,277 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-01-23 07:14:14,277 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-01-23 07:14:14,277 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-01-23 07:14:14,277 INFO L274 PluginConnector]: Witness Printer initialized [2025-01-23 07:14:14,278 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.01 07:14:09" (3/4) ... [2025-01-23 07:14:14,278 INFO L140 WitnessPrinter]: Generating witness for reachability counterexample [2025-01-23 07:14:14,340 INFO L127 tionWitnessGenerator]: Generated YAML witness of length 38. [2025-01-23 07:14:14,393 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/witness.graphml [2025-01-23 07:14:14,393 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/witness.yml [2025-01-23 07:14:14,393 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-01-23 07:14:14,394 INFO L158 Benchmark]: Toolchain (without parser) took 5188.61ms. Allocated memory is still 117.4MB. Free memory was 91.1MB in the beginning and 58.0MB in the end (delta: 33.1MB). Peak memory consumption was 35.4MB. Max. memory is 16.1GB. [2025-01-23 07:14:14,394 INFO L158 Benchmark]: CDTParser took 0.68ms. Allocated memory is still 83.9MB. Free memory was 60.8MB in the beginning and 60.8MB in the end (delta: 37.2kB). There was no memory consumed. Max. memory is 16.1GB. [2025-01-23 07:14:14,394 INFO L158 Benchmark]: CACSL2BoogieTranslator took 308.92ms. Allocated memory is still 117.4MB. Free memory was 90.9MB in the beginning and 70.0MB in the end (delta: 20.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-01-23 07:14:14,394 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.48ms. Allocated memory is still 117.4MB. Free memory was 70.0MB in the beginning and 68.5MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2025-01-23 07:14:14,394 INFO L158 Benchmark]: Boogie Preprocessor took 13.48ms. Allocated memory is still 117.4MB. Free memory was 68.5MB in the beginning and 67.5MB in the end (delta: 973.3kB). There was no memory consumed. Max. memory is 16.1GB. [2025-01-23 07:14:14,395 INFO L158 Benchmark]: RCFGBuilder took 292.06ms. Allocated memory is still 117.4MB. Free memory was 67.3MB in the beginning and 47.7MB in the end (delta: 19.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-01-23 07:14:14,395 INFO L158 Benchmark]: TraceAbstraction took 4427.65ms. Allocated memory is still 117.4MB. Free memory was 47.0MB in the beginning and 80.5MB in the end (delta: -33.5MB). Peak memory consumption was 35.4MB. Max. memory is 16.1GB. [2025-01-23 07:14:14,395 INFO L158 Benchmark]: Witness Printer took 116.10ms. Allocated memory is still 117.4MB. Free memory was 80.5MB in the beginning and 58.0MB in the end (delta: 22.5MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2025-01-23 07:14:14,396 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.68ms. Allocated memory is still 83.9MB. Free memory was 60.8MB in the beginning and 60.8MB in the end (delta: 37.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 308.92ms. Allocated memory is still 117.4MB. Free memory was 90.9MB in the beginning and 70.0MB in the end (delta: 20.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 25.48ms. Allocated memory is still 117.4MB. Free memory was 70.0MB in the beginning and 68.5MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 13.48ms. Allocated memory is still 117.4MB. Free memory was 68.5MB in the beginning and 67.5MB in the end (delta: 973.3kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 292.06ms. Allocated memory is still 117.4MB. Free memory was 67.3MB in the beginning and 47.7MB in the end (delta: 19.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 4427.65ms. Allocated memory is still 117.4MB. Free memory was 47.0MB in the beginning and 80.5MB in the end (delta: -33.5MB). Peak memory consumption was 35.4MB. Max. memory is 16.1GB. * Witness Printer took 116.10ms. Allocated memory is still 117.4MB. Free memory was 80.5MB in the beginning and 58.0MB in the end (delta: 22.5MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Partial order reduction statistics Independence relation #1 benchmarks: ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 3558, independent: 2749, independent conditional: 2502, independent unconditional: 247, dependent: 809, dependent conditional: 802, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 2756, independent: 2749, independent conditional: 2502, independent unconditional: 247, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 2756, independent: 2749, independent conditional: 2502, independent unconditional: 247, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 2756, independent: 2749, independent conditional: 2502, independent unconditional: 247, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 2756, independent: 2749, independent conditional: 0, independent unconditional: 2749, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 2756, independent: 2749, independent conditional: 0, independent unconditional: 2749, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 238, independent: 231, independent conditional: 0, independent unconditional: 231, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 238, independent: 230, independent conditional: 0, independent unconditional: 230, dependent: 8, dependent conditional: 0, dependent unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ProtectedIndependenceRelation.Independence Queries: [ total: 8, independent: 1, independent conditional: 0, independent unconditional: 1, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ProtectedIndependenceRelation.Statistics on underlying relation: SemanticIndependenceRelation.Independence Queries: [ total: 8, independent: 1, independent conditional: 0, independent unconditional: 1, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 209, independent: 38, independent conditional: 0, independent unconditional: 38, dependent: 170, dependent conditional: 0, dependent unconditional: 170, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Symbolic Condition Computations: 0, Symbolic Conditions with UNKNOWN Satisfiability: 0, Protected Queries: 0 ], Cache Queries: [ total: 2756, independent: 2518, independent conditional: 0, independent unconditional: 2518, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 238, unknown conditional: 0, unknown unconditional: 238] , Statistics on independence cache: Total cache size (in pairs): 238, Positive cache size: 231, Positive conditional cache size: 0, Positive unconditional cache size: 231, Negative cache size: 7, Negative conditional cache size: 0, Negative unconditional cache size: 7, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0, Eliminated conditions: 2502, Maximal queried relation: 0, Independence queries for same thread: 802, Persistent sets #1 benchmarks: Persistent set computation time: 0.2s, Number of persistent set computation: 34, Number of trivial persistent sets: 20, Underlying independence relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 254, independent: 247, independent conditional: 0, independent unconditional: 247, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 3558, independent: 2749, independent conditional: 2502, independent unconditional: 247, dependent: 809, dependent conditional: 802, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 2756, independent: 2749, independent conditional: 2502, independent unconditional: 247, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 2756, independent: 2749, independent conditional: 2502, independent unconditional: 247, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 2756, independent: 2749, independent conditional: 2502, independent unconditional: 247, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 2756, independent: 2749, independent conditional: 0, independent unconditional: 2749, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 2756, independent: 2749, independent conditional: 0, independent unconditional: 2749, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 238, independent: 231, independent conditional: 0, independent unconditional: 231, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 238, independent: 230, independent conditional: 0, independent unconditional: 230, dependent: 8, dependent conditional: 0, dependent unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ProtectedIndependenceRelation.Independence Queries: [ total: 8, independent: 1, independent conditional: 0, independent unconditional: 1, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ProtectedIndependenceRelation.Statistics on underlying relation: SemanticIndependenceRelation.Independence Queries: [ total: 8, independent: 1, independent conditional: 0, independent unconditional: 1, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 209, independent: 38, independent conditional: 0, independent unconditional: 38, dependent: 170, dependent conditional: 0, dependent unconditional: 170, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Symbolic Condition Computations: 0, Symbolic Conditions with UNKNOWN Satisfiability: 0, Protected Queries: 0 ], Cache Queries: [ total: 2756, independent: 2518, independent conditional: 0, independent unconditional: 2518, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 238, unknown conditional: 0, unknown unconditional: 238] , Statistics on independence cache: Total cache size (in pairs): 238, Positive cache size: 231, Positive conditional cache size: 0, Positive unconditional cache size: 231, Negative cache size: 7, Negative conditional cache size: 0, Negative unconditional cache size: 7, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0, Eliminated conditions: 2502, Maximal queried relation: 0, Independence queries for same thread: 802 - CounterExampleResult [Line: 681]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L682] 0 int i, j; [L685] 0 int p, q; [L702] 0 int cur = 1, prev = 0, next = 0; [L703] 0 int x; [L713] 0 pthread_t id1, id2; VAL [\at(argc, Pre)=1598, \at(argv, Pre)={1599:1600}, argc=1598, cur=1, i=0, j=0, next=0, p=0, prev=0, q=0, x=0] [L715] 0 i = 1 VAL [\at(argc, Pre)=1598, \at(argv, Pre)={1599:1600}, argc=1598, cur=1, i=1, j=0, next=0, p=0, prev=0, q=0, x=0] [L718] 0 j = 1 VAL [\at(argc, Pre)=1598, \at(argv, Pre)={1599:1600}, argc=1598, cur=1, i=1, j=1, next=0, p=0, prev=0, q=0, x=0] [L720] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [\at(arg, Pre)={0:0}, \at(argc, Pre)=1598, \at(argv, Pre)={1599:1600}, argc=1598, cur=1, i=1, id1=-2, j=1, next=0, p=0, prev=0, q=0, x=0] [L687] 1 p = 0 VAL [\at(arg, Pre)={0:0}, arg={0:0}, cur=1, i=1, j=1, next=0, p=0, prev=0, q=0, x=0] [L721] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, \at(argc, Pre)=1598, \at(argv, Pre)={1599:1600}, arg={0:0}, argc=1598, cur=1, i=1, id1=-2, id2=-1, j=1, next=0, p=0, prev=0, q=0, x=0] [L695] 2 q = 0 VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, arg={0:0}, arg={0:0}, cur=1, i=1, j=1, next=0, p=0, prev=0, q=0, x=0] [L722] CALL, EXPR 0 fib() [L705] 0 x = 0 VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, arg={0:0}, arg={0:0}, cur=1, i=1, j=1, next=0, p=0, prev=0, q=0, x=0] [L687] COND TRUE 1 p < 7 VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, arg={0:0}, arg={0:0}, cur=1, i=1, j=1, next=0, p=0, prev=0, q=0, x=0] [L689] 1 i = i + j VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, arg={0:0}, arg={0:0}, cur=1, i=2, j=1, next=0, p=0, prev=0, q=0, x=0] [L687] 1 p++ VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, arg={0:0}, arg={0:0}, cur=1, i=2, j=1, next=0, p=1, prev=0, q=0, x=0] [L695] COND TRUE 2 q < 7 VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, arg={0:0}, arg={0:0}, cur=1, i=2, j=1, next=0, p=1, prev=0, q=0, x=0] [L697] 2 j = j + i VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, arg={0:0}, arg={0:0}, cur=1, i=2, j=3, next=0, p=1, prev=0, q=0, x=0] [L695] 2 q++ VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, arg={0:0}, arg={0:0}, cur=1, i=2, j=3, next=0, p=1, prev=0, q=1, x=0] [L705] COND TRUE 0 x < 16 [L706] 0 next = prev + cur [L707] 0 prev = cur [L708] 0 cur = next [L705] 0 x++ VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, arg={0:0}, arg={0:0}, cur=1, i=2, j=3, next=1, p=1, prev=1, q=1, x=1] [L687] COND TRUE 1 p < 7 VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, arg={0:0}, arg={0:0}, cur=1, i=2, j=3, next=1, p=1, prev=1, q=1, x=1] [L689] 1 i = i + j VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, arg={0:0}, arg={0:0}, cur=1, i=5, j=3, next=1, p=1, prev=1, q=1, x=1] [L687] 1 p++ VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, arg={0:0}, arg={0:0}, cur=1, i=5, j=3, next=1, p=2, prev=1, q=1, x=1] [L695] COND TRUE 2 q < 7 VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, arg={0:0}, arg={0:0}, cur=1, i=5, j=3, next=1, p=2, prev=1, q=1, x=1] [L697] 2 j = j + i VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, arg={0:0}, arg={0:0}, cur=1, i=5, j=8, next=1, p=2, prev=1, q=1, x=1] [L695] 2 q++ VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, arg={0:0}, arg={0:0}, cur=1, i=5, j=8, next=1, p=2, prev=1, q=2, x=1] [L705] COND TRUE 0 x < 16 [L706] 0 next = prev + cur [L707] 0 prev = cur [L708] 0 cur = next [L705] 0 x++ VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, arg={0:0}, arg={0:0}, cur=2, i=5, j=8, next=2, p=2, prev=1, q=2, x=2] [L687] COND TRUE 1 p < 7 VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, arg={0:0}, arg={0:0}, cur=2, i=5, j=8, next=2, p=2, prev=1, q=2, x=2] [L689] 1 i = i + j VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, arg={0:0}, arg={0:0}, cur=2, i=13, j=8, next=2, p=2, prev=1, q=2, x=2] [L687] 1 p++ VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, arg={0:0}, arg={0:0}, cur=2, i=13, j=8, next=2, p=3, prev=1, q=2, x=2] [L695] COND TRUE 2 q < 7 VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, arg={0:0}, arg={0:0}, cur=2, i=13, j=8, next=2, p=3, prev=1, q=2, x=2] [L697] 2 j = j + i VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, arg={0:0}, arg={0:0}, cur=2, i=13, j=21, next=2, p=3, prev=1, q=2, x=2] [L695] 2 q++ VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, arg={0:0}, arg={0:0}, cur=2, i=13, j=21, next=2, p=3, prev=1, q=3, x=2] [L705] COND TRUE 0 x < 16 [L706] 0 next = prev + cur [L707] 0 prev = cur [L708] 0 cur = next [L705] 0 x++ VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, arg={0:0}, arg={0:0}, cur=3, i=13, j=21, next=3, p=3, prev=2, q=3, x=3] [L687] COND TRUE 1 p < 7 VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, arg={0:0}, arg={0:0}, cur=3, i=13, j=21, next=3, p=3, prev=2, q=3, x=3] [L689] 1 i = i + j VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, arg={0:0}, arg={0:0}, cur=3, i=34, j=21, next=3, p=3, prev=2, q=3, x=3] [L687] 1 p++ VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, arg={0:0}, arg={0:0}, cur=3, i=34, j=21, next=3, p=4, prev=2, q=3, x=3] [L695] COND TRUE 2 q < 7 VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, arg={0:0}, arg={0:0}, cur=3, i=34, j=21, next=3, p=4, prev=2, q=3, x=3] [L697] 2 j = j + i VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, arg={0:0}, arg={0:0}, cur=3, i=34, j=55, next=3, p=4, prev=2, q=3, x=3] [L695] 2 q++ VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, arg={0:0}, arg={0:0}, cur=3, i=34, j=55, next=3, p=4, prev=2, q=4, x=3] [L705] COND TRUE 0 x < 16 [L706] 0 next = prev + cur [L707] 0 prev = cur [L708] 0 cur = next [L705] 0 x++ VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, arg={0:0}, arg={0:0}, cur=5, i=34, j=55, next=5, p=4, prev=3, q=4, x=4] [L687] COND TRUE 1 p < 7 VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, arg={0:0}, arg={0:0}, cur=5, i=34, j=55, next=5, p=4, prev=3, q=4, x=4] [L689] 1 i = i + j VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, arg={0:0}, arg={0:0}, cur=5, i=89, j=55, next=5, p=4, prev=3, q=4, x=4] [L687] 1 p++ VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, arg={0:0}, arg={0:0}, cur=5, i=89, j=55, next=5, p=5, prev=3, q=4, x=4] [L695] COND TRUE 2 q < 7 VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, arg={0:0}, arg={0:0}, cur=5, i=89, j=55, next=5, p=5, prev=3, q=4, x=4] [L697] 2 j = j + i VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, arg={0:0}, arg={0:0}, cur=5, i=89, j=144, next=5, p=5, prev=3, q=4, x=4] [L695] 2 q++ VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, arg={0:0}, arg={0:0}, cur=5, i=89, j=144, next=5, p=5, prev=3, q=5, x=4] [L705] COND TRUE 0 x < 16 [L706] 0 next = prev + cur [L707] 0 prev = cur [L708] 0 cur = next [L705] 0 x++ VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, arg={0:0}, arg={0:0}, cur=8, i=89, j=144, next=8, p=5, prev=5, q=5, x=5] [L687] COND TRUE 1 p < 7 VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, arg={0:0}, arg={0:0}, cur=8, i=89, j=144, next=8, p=5, prev=5, q=5, x=5] [L689] 1 i = i + j VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, arg={0:0}, arg={0:0}, cur=8, i=233, j=144, next=8, p=5, prev=5, q=5, x=5] [L687] 1 p++ VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, arg={0:0}, arg={0:0}, cur=8, i=233, j=144, next=8, p=6, prev=5, q=5, x=5] [L695] COND TRUE 2 q < 7 VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, arg={0:0}, arg={0:0}, cur=8, i=233, j=144, next=8, p=6, prev=5, q=5, x=5] [L697] 2 j = j + i VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, arg={0:0}, arg={0:0}, cur=8, i=233, j=377, next=8, p=6, prev=5, q=5, x=5] [L695] 2 q++ VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, arg={0:0}, arg={0:0}, cur=8, i=233, j=377, next=8, p=6, prev=5, q=6, x=5] [L705] COND TRUE 0 x < 16 [L706] 0 next = prev + cur [L707] 0 prev = cur [L708] 0 cur = next [L705] 0 x++ VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, arg={0:0}, arg={0:0}, cur=13, i=233, j=377, next=13, p=6, prev=8, q=6, x=6] [L687] COND TRUE 1 p < 7 VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, arg={0:0}, arg={0:0}, cur=13, i=233, j=377, next=13, p=6, prev=8, q=6, x=6] [L689] 1 i = i + j VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, arg={0:0}, arg={0:0}, cur=13, i=610, j=377, next=13, p=6, prev=8, q=6, x=6] [L687] 1 p++ VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, arg={0:0}, arg={0:0}, cur=13, i=610, j=377, next=13, p=7, prev=8, q=6, x=6] [L695] COND TRUE 2 q < 7 VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, arg={0:0}, arg={0:0}, cur=13, i=610, j=377, next=13, p=7, prev=8, q=6, x=6] [L697] 2 j = j + i VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, arg={0:0}, arg={0:0}, cur=13, i=610, j=987, next=13, p=7, prev=8, q=6, x=6] [L695] 2 q++ VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, arg={0:0}, arg={0:0}, cur=13, i=610, j=987, next=13, p=7, prev=8, q=7, x=6] [L705] COND TRUE 0 x < 16 [L706] 0 next = prev + cur [L707] 0 prev = cur [L708] 0 cur = next [L705] 0 x++ VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, arg={0:0}, arg={0:0}, cur=21, i=610, j=987, next=21, p=7, prev=13, q=7, x=7] [L687] COND FALSE 1 !(p < 7) [L692] 1 return ((void *)0); [L695] COND FALSE 2 !(q < 7) [L700] 2 return ((void *)0); [L705] COND TRUE 0 x < 16 [L706] 0 next = prev + cur [L707] 0 prev = cur [L708] 0 cur = next [L705] 0 x++ VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, cur=34, i=610, j=987, next=34, p=7, prev=21, q=7, x=8] [L705] COND TRUE 0 x < 16 [L706] 0 next = prev + cur [L707] 0 prev = cur [L708] 0 cur = next [L705] 0 x++ VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, cur=55, i=610, j=987, next=55, p=7, prev=34, q=7, x=9] [L705] COND TRUE 0 x < 16 [L706] 0 next = prev + cur [L707] 0 prev = cur [L708] 0 cur = next [L705] 0 x++ VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, cur=89, i=610, j=987, next=89, p=7, prev=55, q=7, x=10] [L705] COND TRUE 0 x < 16 [L706] 0 next = prev + cur [L707] 0 prev = cur [L708] 0 cur = next [L705] 0 x++ VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, cur=144, i=610, j=987, next=144, p=7, prev=89, q=7, x=11] [L705] COND TRUE 0 x < 16 [L706] 0 next = prev + cur [L707] 0 prev = cur [L708] 0 cur = next [L705] 0 x++ VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, cur=233, i=610, j=987, next=233, p=7, prev=144, q=7, x=12] [L705] COND TRUE 0 x < 16 [L706] 0 next = prev + cur [L707] 0 prev = cur [L708] 0 cur = next [L705] 0 x++ VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, cur=377, i=610, j=987, next=377, p=7, prev=233, q=7, x=13] [L705] COND TRUE 0 x < 16 [L706] 0 next = prev + cur [L707] 0 prev = cur [L708] 0 cur = next [L705] 0 x++ VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, cur=610, i=610, j=987, next=610, p=7, prev=377, q=7, x=14] [L705] COND TRUE 0 x < 16 [L706] 0 next = prev + cur [L707] 0 prev = cur [L708] 0 cur = next [L705] 0 x++ VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, cur=987, i=610, j=987, next=987, p=7, prev=610, q=7, x=15] [L705] COND TRUE 0 x < 16 [L706] 0 next = prev + cur [L707] 0 prev = cur [L708] 0 cur = next [L705] 0 x++ VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, cur=1597, i=610, j=987, next=1597, p=7, prev=987, q=7, x=16] [L705] COND FALSE 0 !(x < 16) [L710] 0 return prev; [L722] RET, EXPR 0 fib() [L722] 0 int correct = fib(); [L724] 0 _Bool assert_cond = i < correct && j < correct; VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, \at(argc, Pre)=1598, \at(argv, Pre)={1599:1600}, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, argc=1598, assert_cond=0, correct=987, cur=1597, i=610, id1=-2, id2=-1, j=987, next=1597, p=7, prev=987, q=7, x=16] [L726] CALL 0 __VERIFIER_assert(assert_cond) [L681] COND TRUE 0 !expression VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, \at(expression, Pre)=0, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, cur=1597, expression=0, i=610, j=987, next=1597, p=7, prev=987, q=7, x=16] [L681] 0 reach_error() VAL [\at(arg, Pre)={0:0}, \at(arg, Pre)={0:0}, \at(expression, Pre)=0, \result={0:0}, \result={0:0}, arg={0:0}, arg={0:0}, cur=1597, expression=0, i=610, j=987, next=1597, p=7, prev=987, q=7, x=16] - UnprovableResult [Line: 720]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 721]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 38 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 4.2s, OverallIterations: 7, TraceHistogramMax: 0, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.8s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=0occurred in iteration=0, InterpolantAutomatonStates: 59, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 730 NumberOfCodeBlocks, 730 NumberOfCodeBlocksAsserted, 35 NumberOfCheckSat, 787 ConstructedInterpolants, 0 QuantifiedInterpolants, 1965 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1195 ConjunctsInSsa, 42 ConjunctsInUnsatCore, 14 InterpolantComputations, 3 PerfectInterpolantSequences, 563/1837 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2025-01-23 07:14:14,412 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UGemCutter-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE