/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked TOGETHER -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_rfi000_power.opt_pso.opt_rmo.opt_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 17:45:59,498 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 17:45:59,572 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 17:45:59,575 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 17:45:59,576 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 17:45:59,576 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 17:45:59,576 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 17:45:59,596 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 17:45:59,598 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 17:45:59,601 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 17:45:59,602 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 17:45:59,602 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 17:45:59,602 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 17:45:59,603 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 17:45:59,604 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 17:45:59,604 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 17:45:59,604 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 17:45:59,604 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 17:45:59,605 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 17:45:59,605 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 17:45:59,605 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 17:45:59,605 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 17:45:59,606 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 17:45:59,606 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 17:45:59,606 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 17:45:59,607 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 17:45:59,607 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 17:45:59,608 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 17:45:59,608 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 17:45:59,608 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 17:45:59,609 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 17:45:59,610 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 17:45:59,610 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 17:45:59,610 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 17:45:59,610 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 17:45:59,610 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 17:45:59,610 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 17:45:59,610 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 17:45:59,611 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 17:45:59,611 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 17:45:59,611 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 17:45:59,611 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 17:45:59,793 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 17:45:59,809 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 17:45:59,811 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 17:45:59,812 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 17:45:59,813 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 17:45:59,813 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_rfi000_power.opt_pso.opt_rmo.opt_bound2.i [2023-08-03 17:46:00,928 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 17:46:01,183 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 17:46:01,183 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_rfi000_power.opt_pso.opt_rmo.opt_bound2.i [2023-08-03 17:46:01,197 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b97a697ef/503c56da7a6b48bca0123d55598645a8/FLAG2b8ad3994 [2023-08-03 17:46:01,212 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b97a697ef/503c56da7a6b48bca0123d55598645a8 [2023-08-03 17:46:01,217 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 17:46:01,218 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 17:46:01,222 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 17:46:01,222 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 17:46:01,225 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 17:46:01,225 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 05:46:01" (1/1) ... [2023-08-03 17:46:01,226 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1618d879 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:46:01, skipping insertion in model container [2023-08-03 17:46:01,227 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 05:46:01" (1/1) ... [2023-08-03 17:46:01,268 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 17:46:01,389 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_rfi000_power.opt_pso.opt_rmo.opt_bound2.i[966,979] [2023-08-03 17:46:01,541 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 17:46:01,553 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 17:46:01,564 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_rfi000_power.opt_pso.opt_rmo.opt_bound2.i[966,979] [2023-08-03 17:46:01,572 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-03 17:46:01,573 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-03 17:46:01,599 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 17:46:01,627 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 17:46:01,627 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 17:46:01,633 INFO L206 MainTranslator]: Completed translation [2023-08-03 17:46:01,635 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:46:01 WrapperNode [2023-08-03 17:46:01,636 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 17:46:01,637 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 17:46:01,637 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 17:46:01,637 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 17:46:01,643 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:46:01" (1/1) ... [2023-08-03 17:46:01,675 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:46:01" (1/1) ... [2023-08-03 17:46:01,704 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 152 [2023-08-03 17:46:01,713 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 17:46:01,714 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 17:46:01,714 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 17:46:01,714 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 17:46:01,722 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:46:01" (1/1) ... [2023-08-03 17:46:01,722 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:46:01" (1/1) ... [2023-08-03 17:46:01,725 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:46:01" (1/1) ... [2023-08-03 17:46:01,725 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:46:01" (1/1) ... [2023-08-03 17:46:01,736 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:46:01" (1/1) ... [2023-08-03 17:46:01,740 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:46:01" (1/1) ... [2023-08-03 17:46:01,742 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:46:01" (1/1) ... [2023-08-03 17:46:01,743 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:46:01" (1/1) ... [2023-08-03 17:46:01,746 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 17:46:01,746 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 17:46:01,747 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 17:46:01,747 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 17:46:01,748 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:46:01" (1/1) ... [2023-08-03 17:46:01,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 17:46:01,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 17:46:01,790 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-03 17:46:01,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-03 17:46:01,828 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 17:46:01,828 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 17:46:01,828 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 17:46:01,828 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 17:46:01,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 17:46:01,830 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-03 17:46:01,830 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-03 17:46:01,830 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-03 17:46:01,830 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-03 17:46:01,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 17:46:01,831 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 17:46:01,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 17:46:01,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 17:46:01,832 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-03 17:46:02,013 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 17:46:02,015 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 17:46:02,302 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 17:46:02,391 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 17:46:02,391 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-03 17:46:02,393 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 05:46:02 BoogieIcfgContainer [2023-08-03 17:46:02,393 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 17:46:02,395 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 17:46:02,395 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 17:46:02,398 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 17:46:02,398 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 05:46:01" (1/3) ... [2023-08-03 17:46:02,398 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@756808be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 05:46:02, skipping insertion in model container [2023-08-03 17:46:02,399 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:46:01" (2/3) ... [2023-08-03 17:46:02,399 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@756808be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 05:46:02, skipping insertion in model container [2023-08-03 17:46:02,399 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 05:46:02" (3/3) ... [2023-08-03 17:46:02,400 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_rfi000_power.opt_pso.opt_rmo.opt_bound2.i [2023-08-03 17:46:02,406 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 17:46:02,414 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 17:46:02,414 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-03 17:46:02,414 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 17:46:02,448 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 17:46:02,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 104 transitions, 218 flow [2023-08-03 17:46:02,530 INFO L124 PetriNetUnfolderBase]: 14/222 cut-off events. [2023-08-03 17:46:02,530 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 17:46:02,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234 conditions, 222 events. 14/222 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 629 event pairs, 0 based on Foata normal form. 0/196 useless extension candidates. Maximal degree in co-relation 129. Up to 8 conditions per place. [2023-08-03 17:46:02,535 INFO L82 GeneralOperation]: Start removeDead. Operand has 105 places, 104 transitions, 218 flow [2023-08-03 17:46:02,539 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 104 transitions, 218 flow [2023-08-03 17:46:02,542 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 17:46:02,552 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 105 places, 104 transitions, 218 flow [2023-08-03 17:46:02,554 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 105 places, 104 transitions, 218 flow [2023-08-03 17:46:02,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 104 transitions, 218 flow [2023-08-03 17:46:02,592 INFO L124 PetriNetUnfolderBase]: 14/222 cut-off events. [2023-08-03 17:46:02,592 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 17:46:02,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234 conditions, 222 events. 14/222 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 629 event pairs, 0 based on Foata normal form. 0/196 useless extension candidates. Maximal degree in co-relation 129. Up to 8 conditions per place. [2023-08-03 17:46:02,595 INFO L119 LiptonReduction]: Number of co-enabled transitions 1608 [2023-08-03 17:46:06,096 INFO L134 LiptonReduction]: Checked pairs total: 4404 [2023-08-03 17:46:06,096 INFO L136 LiptonReduction]: Total number of compositions: 90 [2023-08-03 17:46:06,109 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 17:46:06,113 INFO L357 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, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@7b27461c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 17:46:06,113 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-03 17:46:06,118 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 17:46:06,119 INFO L124 PetriNetUnfolderBase]: 0/10 cut-off events. [2023-08-03 17:46:06,119 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 17:46:06,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 17:46:06,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-03 17:46:06,120 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P1Err0ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-03 17:46:06,124 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 17:46:06,124 INFO L85 PathProgramCache]: Analyzing trace with hash 446911696, now seen corresponding path program 1 times [2023-08-03 17:46:06,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 17:46:06,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379266443] [2023-08-03 17:46:06,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 17:46:06,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 17:46:06,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 17:46:06,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 17:46:06,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 17:46:06,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379266443] [2023-08-03 17:46:06,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379266443] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 17:46:06,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 17:46:06,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 17:46:06,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736571244] [2023-08-03 17:46:06,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 17:46:06,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 17:46:06,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 17:46:06,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 17:46:06,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 17:46:06,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 194 [2023-08-03 17:46:06,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 25 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 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) [2023-08-03 17:46:06,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 17:46:06,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 194 [2023-08-03 17:46:06,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 17:46:06,608 INFO L124 PetriNetUnfolderBase]: 225/496 cut-off events. [2023-08-03 17:46:06,608 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 17:46:06,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 921 conditions, 496 events. 225/496 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2460 event pairs, 96 based on Foata normal form. 0/416 useless extension candidates. Maximal degree in co-relation 901. Up to 398 conditions per place. [2023-08-03 17:46:06,616 INFO L140 encePairwiseOnDemand]: 191/194 looper letters, 21 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2023-08-03 17:46:06,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 29 transitions, 114 flow [2023-08-03 17:46:06,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 17:46:06,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 17:46:06,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 285 transitions. [2023-08-03 17:46:06,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4896907216494845 [2023-08-03 17:46:06,635 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 285 transitions. [2023-08-03 17:46:06,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 285 transitions. [2023-08-03 17:46:06,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 17:46:06,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 285 transitions. [2023-08-03 17:46:06,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 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) [2023-08-03 17:46:06,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 194.0) internal successors, (776), 4 states have internal predecessors, (776), 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) [2023-08-03 17:46:06,650 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 194.0) internal successors, (776), 4 states have internal predecessors, (776), 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) [2023-08-03 17:46:06,652 INFO L175 Difference]: Start difference. First operand has 30 places, 25 transitions, 60 flow. Second operand 3 states and 285 transitions. [2023-08-03 17:46:06,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 29 transitions, 114 flow [2023-08-03 17:46:06,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 29 transitions, 114 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 17:46:06,655 INFO L231 Difference]: Finished difference. Result has 33 places, 25 transitions, 68 flow [2023-08-03 17:46:06,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=194, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=33, PETRI_TRANSITIONS=25} [2023-08-03 17:46:06,660 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2023-08-03 17:46:06,661 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 25 transitions, 68 flow [2023-08-03 17:46:06,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 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) [2023-08-03 17:46:06,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 17:46:06,661 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 17:46:06,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 17:46:06,662 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-03 17:46:06,663 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 17:46:06,663 INFO L85 PathProgramCache]: Analyzing trace with hash 962104494, now seen corresponding path program 1 times [2023-08-03 17:46:06,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 17:46:06,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773186689] [2023-08-03 17:46:06,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 17:46:06,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 17:46:06,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 17:46:06,708 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 17:46:06,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 17:46:06,756 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 17:46:06,756 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 17:46:06,757 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-08-03 17:46:06,762 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location P1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-08-03 17:46:06,762 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-08-03 17:46:06,762 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 5 remaining) [2023-08-03 17:46:06,763 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location P1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-08-03 17:46:06,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 17:46:06,763 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-03 17:46:06,766 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 17:46:06,766 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 17:46:06,795 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 17:46:06,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 128 places, 123 transitions, 270 flow [2023-08-03 17:46:06,853 INFO L124 PetriNetUnfolderBase]: 30/463 cut-off events. [2023-08-03 17:46:06,853 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 17:46:06,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 496 conditions, 463 events. 30/463 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2005 event pairs, 0 based on Foata normal form. 0/406 useless extension candidates. Maximal degree in co-relation 332. Up to 18 conditions per place. [2023-08-03 17:46:06,856 INFO L82 GeneralOperation]: Start removeDead. Operand has 128 places, 123 transitions, 270 flow [2023-08-03 17:46:06,857 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 128 places, 123 transitions, 270 flow [2023-08-03 17:46:06,857 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 17:46:06,858 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 128 places, 123 transitions, 270 flow [2023-08-03 17:46:06,858 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 128 places, 123 transitions, 270 flow [2023-08-03 17:46:06,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 128 places, 123 transitions, 270 flow [2023-08-03 17:46:06,904 INFO L124 PetriNetUnfolderBase]: 30/463 cut-off events. [2023-08-03 17:46:06,904 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 17:46:06,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 496 conditions, 463 events. 30/463 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2005 event pairs, 0 based on Foata normal form. 0/406 useless extension candidates. Maximal degree in co-relation 332. Up to 18 conditions per place. [2023-08-03 17:46:06,911 INFO L119 LiptonReduction]: Number of co-enabled transitions 3856 [2023-08-03 17:46:10,262 INFO L134 LiptonReduction]: Checked pairs total: 11897 [2023-08-03 17:46:10,262 INFO L136 LiptonReduction]: Total number of compositions: 95 [2023-08-03 17:46:10,264 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 17:46:10,265 INFO L357 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, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@7b27461c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 17:46:10,265 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-03 17:46:10,268 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 17:46:10,268 INFO L124 PetriNetUnfolderBase]: 0/14 cut-off events. [2023-08-03 17:46:10,269 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 17:46:10,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 17:46:10,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-03 17:46:10,269 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P1Err0ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-03 17:46:10,270 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 17:46:10,270 INFO L85 PathProgramCache]: Analyzing trace with hash 673089458, now seen corresponding path program 1 times [2023-08-03 17:46:10,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 17:46:10,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140207557] [2023-08-03 17:46:10,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 17:46:10,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 17:46:10,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 17:46:10,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 17:46:10,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 17:46:10,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140207557] [2023-08-03 17:46:10,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140207557] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 17:46:10,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 17:46:10,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 17:46:10,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824308949] [2023-08-03 17:46:10,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 17:46:10,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 17:46:10,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 17:46:10,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 17:46:10,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 17:46:10,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 218 [2023-08-03 17:46:10,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 40 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 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) [2023-08-03 17:46:10,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 17:46:10,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 218 [2023-08-03 17:46:10,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 17:46:12,597 INFO L124 PetriNetUnfolderBase]: 11578/18202 cut-off events. [2023-08-03 17:46:12,597 INFO L125 PetriNetUnfolderBase]: For 384/384 co-relation queries the response was YES. [2023-08-03 17:46:12,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34690 conditions, 18202 events. 11578/18202 cut-off events. For 384/384 co-relation queries the response was YES. Maximal size of possible extension queue 811. Compared 130368 event pairs, 8296 based on Foata normal form. 0/15106 useless extension candidates. Maximal degree in co-relation 7628. Up to 15955 conditions per place. [2023-08-03 17:46:12,731 INFO L140 encePairwiseOnDemand]: 215/218 looper letters, 31 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-08-03 17:46:12,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 45 transitions, 180 flow [2023-08-03 17:46:12,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 17:46:12,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 17:46:12,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 334 transitions. [2023-08-03 17:46:12,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5107033639143731 [2023-08-03 17:46:12,734 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 334 transitions. [2023-08-03 17:46:12,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 334 transitions. [2023-08-03 17:46:12,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 17:46:12,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 334 transitions. [2023-08-03 17:46:12,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 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) [2023-08-03 17:46:12,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 218.0) internal successors, (872), 4 states have internal predecessors, (872), 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) [2023-08-03 17:46:12,740 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 218.0) internal successors, (872), 4 states have internal predecessors, (872), 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) [2023-08-03 17:46:12,740 INFO L175 Difference]: Start difference. First operand has 49 places, 40 transitions, 104 flow. Second operand 3 states and 334 transitions. [2023-08-03 17:46:12,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 45 transitions, 180 flow [2023-08-03 17:46:12,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 45 transitions, 176 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-03 17:46:12,744 INFO L231 Difference]: Finished difference. Result has 52 places, 41 transitions, 112 flow [2023-08-03 17:46:12,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=218, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=52, PETRI_TRANSITIONS=41} [2023-08-03 17:46:12,745 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2023-08-03 17:46:12,745 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 41 transitions, 112 flow [2023-08-03 17:46:12,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 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) [2023-08-03 17:46:12,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 17:46:12,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 17:46:12,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 17:46:12,746 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-03 17:46:12,747 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 17:46:12,747 INFO L85 PathProgramCache]: Analyzing trace with hash -864413089, now seen corresponding path program 1 times [2023-08-03 17:46:12,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 17:46:12,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110620441] [2023-08-03 17:46:12,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 17:46:12,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 17:46:12,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 17:46:12,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 17:46:12,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 17:46:12,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110620441] [2023-08-03 17:46:12,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110620441] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 17:46:12,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643031032] [2023-08-03 17:46:12,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 17:46:12,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 17:46:12,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 17:46:12,877 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 17:46:12,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 17:46:12,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 17:46:12,961 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 17:46:12,963 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 17:46:12,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 17:46:12,984 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 17:46:12,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643031032] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 17:46:12,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 17:46:12,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 17:46:12,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404383384] [2023-08-03 17:46:12,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 17:46:12,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 17:46:12,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 17:46:12,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 17:46:12,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 17:46:13,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 218 [2023-08-03 17:46:13,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 41 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 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) [2023-08-03 17:46:13,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 17:46:13,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 218 [2023-08-03 17:46:13,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 17:46:15,089 INFO L124 PetriNetUnfolderBase]: 11470/17730 cut-off events. [2023-08-03 17:46:15,089 INFO L125 PetriNetUnfolderBase]: For 186/186 co-relation queries the response was YES. [2023-08-03 17:46:15,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33992 conditions, 17730 events. 11470/17730 cut-off events. For 186/186 co-relation queries the response was YES. Maximal size of possible extension queue 810. Compared 124412 event pairs, 9601 based on Foata normal form. 0/14833 useless extension candidates. Maximal degree in co-relation 33951. Up to 15444 conditions per place. [2023-08-03 17:46:15,166 INFO L140 encePairwiseOnDemand]: 215/218 looper letters, 39 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2023-08-03 17:46:15,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 53 transitions, 218 flow [2023-08-03 17:46:15,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 17:46:15,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 17:46:15,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 341 transitions. [2023-08-03 17:46:15,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5214067278287462 [2023-08-03 17:46:15,168 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 341 transitions. [2023-08-03 17:46:15,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 341 transitions. [2023-08-03 17:46:15,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 17:46:15,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 341 transitions. [2023-08-03 17:46:15,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 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) [2023-08-03 17:46:15,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 218.0) internal successors, (872), 4 states have internal predecessors, (872), 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) [2023-08-03 17:46:15,172 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 218.0) internal successors, (872), 4 states have internal predecessors, (872), 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) [2023-08-03 17:46:15,172 INFO L175 Difference]: Start difference. First operand has 52 places, 41 transitions, 112 flow. Second operand 3 states and 341 transitions. [2023-08-03 17:46:15,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 53 transitions, 218 flow [2023-08-03 17:46:15,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 53 transitions, 216 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 17:46:15,174 INFO L231 Difference]: Finished difference. Result has 54 places, 42 transitions, 122 flow [2023-08-03 17:46:15,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=218, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=54, PETRI_TRANSITIONS=42} [2023-08-03 17:46:15,175 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 5 predicate places. [2023-08-03 17:46:15,175 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 42 transitions, 122 flow [2023-08-03 17:46:15,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 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) [2023-08-03 17:46:15,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 17:46:15,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 17:46:15,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-03 17:46:15,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 17:46:15,381 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting P1Err0ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-03 17:46:15,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 17:46:15,382 INFO L85 PathProgramCache]: Analyzing trace with hash -864420696, now seen corresponding path program 1 times [2023-08-03 17:46:15,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 17:46:15,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810982851] [2023-08-03 17:46:15,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 17:46:15,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 17:46:15,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 17:46:15,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 17:46:15,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 17:46:15,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810982851] [2023-08-03 17:46:15,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810982851] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 17:46:15,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325089905] [2023-08-03 17:46:15,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 17:46:15,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 17:46:15,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 17:46:15,433 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 17:46:15,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-03 17:46:15,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 17:46:15,521 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 17:46:15,523 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 17:46:15,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 17:46:15,559 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 17:46:15,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 17:46:15,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325089905] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 17:46:15,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 17:46:15,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 17:46:15,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805620104] [2023-08-03 17:46:15,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 17:46:15,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 17:46:15,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 17:46:15,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 17:46:15,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 17:46:15,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 218 [2023-08-03 17:46:15,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 42 transitions, 122 flow. Second operand has 5 states, 5 states have (on average 101.4) internal successors, (507), 5 states have internal predecessors, (507), 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) [2023-08-03 17:46:15,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 17:46:15,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 218 [2023-08-03 17:46:15,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 17:46:17,234 INFO L124 PetriNetUnfolderBase]: 9698/14418 cut-off events. [2023-08-03 17:46:17,234 INFO L125 PetriNetUnfolderBase]: For 1132/1132 co-relation queries the response was YES. [2023-08-03 17:46:17,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29026 conditions, 14418 events. 9698/14418 cut-off events. For 1132/1132 co-relation queries the response was YES. Maximal size of possible extension queue 687. Compared 92565 event pairs, 4556 based on Foata normal form. 4/12374 useless extension candidates. Maximal degree in co-relation 7668. Up to 13065 conditions per place. [2023-08-03 17:46:17,305 INFO L140 encePairwiseOnDemand]: 214/218 looper letters, 37 selfloop transitions, 4 changer transitions 0/53 dead transitions. [2023-08-03 17:46:17,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 53 transitions, 226 flow [2023-08-03 17:46:17,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 17:46:17,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 17:46:17,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 437 transitions. [2023-08-03 17:46:17,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5011467889908257 [2023-08-03 17:46:17,311 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 437 transitions. [2023-08-03 17:46:17,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 437 transitions. [2023-08-03 17:46:17,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 17:46:17,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 437 transitions. [2023-08-03 17:46:17,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 109.25) internal successors, (437), 4 states have internal predecessors, (437), 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) [2023-08-03 17:46:17,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 218.0) internal successors, (1090), 5 states have internal predecessors, (1090), 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) [2023-08-03 17:46:17,315 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 218.0) internal successors, (1090), 5 states have internal predecessors, (1090), 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) [2023-08-03 17:46:17,315 INFO L175 Difference]: Start difference. First operand has 54 places, 42 transitions, 122 flow. Second operand 4 states and 437 transitions. [2023-08-03 17:46:17,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 53 transitions, 226 flow [2023-08-03 17:46:17,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 53 transitions, 224 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 17:46:17,320 INFO L231 Difference]: Finished difference. Result has 58 places, 43 transitions, 140 flow [2023-08-03 17:46:17,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=218, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=58, PETRI_TRANSITIONS=43} [2023-08-03 17:46:17,321 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 9 predicate places. [2023-08-03 17:46:17,322 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 43 transitions, 140 flow [2023-08-03 17:46:17,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 101.4) internal successors, (507), 5 states have internal predecessors, (507), 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) [2023-08-03 17:46:17,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 17:46:17,322 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 17:46:17,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-03 17:46:17,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 17:46:17,528 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-03 17:46:17,528 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 17:46:17,528 INFO L85 PathProgramCache]: Analyzing trace with hash 2129334191, now seen corresponding path program 1 times [2023-08-03 17:46:17,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 17:46:17,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043409541] [2023-08-03 17:46:17,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 17:46:17,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 17:46:17,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 17:46:17,589 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 17:46:17,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 17:46:17,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043409541] [2023-08-03 17:46:17,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043409541] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 17:46:17,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368787931] [2023-08-03 17:46:17,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 17:46:17,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 17:46:17,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 17:46:17,595 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 17:46:17,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-03 17:46:17,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 17:46:17,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 17:46:17,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 17:46:17,696 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 17:46:17,696 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 17:46:17,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368787931] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 17:46:17,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 17:46:17,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 17:46:17,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435906024] [2023-08-03 17:46:17,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 17:46:17,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 17:46:17,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 17:46:17,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 17:46:17,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 17:46:17,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 218 [2023-08-03 17:46:17,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 43 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 100.6) internal successors, (503), 5 states have internal predecessors, (503), 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) [2023-08-03 17:46:17,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 17:46:17,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 218 [2023-08-03 17:46:17,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 17:46:18,960 INFO L124 PetriNetUnfolderBase]: 9674/14370 cut-off events. [2023-08-03 17:46:18,961 INFO L125 PetriNetUnfolderBase]: For 1212/1212 co-relation queries the response was YES. [2023-08-03 17:46:18,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28914 conditions, 14370 events. 9674/14370 cut-off events. For 1212/1212 co-relation queries the response was YES. Maximal size of possible extension queue 687. Compared 92218 event pairs, 4544 based on Foata normal form. 16/12338 useless extension candidates. Maximal degree in co-relation 7635. Up to 13064 conditions per place. [2023-08-03 17:46:19,012 INFO L140 encePairwiseOnDemand]: 215/218 looper letters, 37 selfloop transitions, 3 changer transitions 0/51 dead transitions. [2023-08-03 17:46:19,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 51 transitions, 232 flow [2023-08-03 17:46:19,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 17:46:19,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 17:46:19,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 535 transitions. [2023-08-03 17:46:19,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4908256880733945 [2023-08-03 17:46:19,014 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 535 transitions. [2023-08-03 17:46:19,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 535 transitions. [2023-08-03 17:46:19,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 17:46:19,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 535 transitions. [2023-08-03 17:46:19,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 107.0) internal successors, (535), 5 states have internal predecessors, (535), 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) [2023-08-03 17:46:19,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 218.0) internal successors, (1308), 6 states have internal predecessors, (1308), 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) [2023-08-03 17:46:19,018 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 218.0) internal successors, (1308), 6 states have internal predecessors, (1308), 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) [2023-08-03 17:46:19,019 INFO L175 Difference]: Start difference. First operand has 58 places, 43 transitions, 140 flow. Second operand 5 states and 535 transitions. [2023-08-03 17:46:19,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 51 transitions, 232 flow [2023-08-03 17:46:19,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 51 transitions, 225 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-03 17:46:19,021 INFO L231 Difference]: Finished difference. Result has 58 places, 41 transitions, 129 flow [2023-08-03 17:46:19,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=218, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=129, PETRI_PLACES=58, PETRI_TRANSITIONS=41} [2023-08-03 17:46:19,021 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 9 predicate places. [2023-08-03 17:46:19,021 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 41 transitions, 129 flow [2023-08-03 17:46:19,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.6) internal successors, (503), 5 states have internal predecessors, (503), 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) [2023-08-03 17:46:19,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 17:46:19,022 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 17:46:19,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-03 17:46:19,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 17:46:19,227 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting P1Err0ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-03 17:46:19,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 17:46:19,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1886142943, now seen corresponding path program 1 times [2023-08-03 17:46:19,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 17:46:19,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455916474] [2023-08-03 17:46:19,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 17:46:19,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 17:46:19,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 17:46:19,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 17:46:19,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 17:46:19,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455916474] [2023-08-03 17:46:19,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455916474] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 17:46:19,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 17:46:19,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-03 17:46:19,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490563188] [2023-08-03 17:46:19,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 17:46:19,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 17:46:19,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 17:46:19,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 17:46:19,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 17:46:19,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 218 [2023-08-03 17:46:19,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 41 transitions, 129 flow. Second operand has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 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) [2023-08-03 17:46:19,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 17:46:19,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 218 [2023-08-03 17:46:19,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 17:46:20,531 INFO L124 PetriNetUnfolderBase]: 8266/12999 cut-off events. [2023-08-03 17:46:20,532 INFO L125 PetriNetUnfolderBase]: For 1171/1171 co-relation queries the response was YES. [2023-08-03 17:46:20,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25450 conditions, 12999 events. 8266/12999 cut-off events. For 1171/1171 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 88327 event pairs, 1546 based on Foata normal form. 0/11463 useless extension candidates. Maximal degree in co-relation 11933. Up to 10529 conditions per place. [2023-08-03 17:46:20,585 INFO L140 encePairwiseOnDemand]: 213/218 looper letters, 43 selfloop transitions, 3 changer transitions 0/57 dead transitions. [2023-08-03 17:46:20,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 57 transitions, 264 flow [2023-08-03 17:46:20,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 17:46:20,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 17:46:20,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 354 transitions. [2023-08-03 17:46:20,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5412844036697247 [2023-08-03 17:46:20,587 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 354 transitions. [2023-08-03 17:46:20,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 354 transitions. [2023-08-03 17:46:20,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 17:46:20,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 354 transitions. [2023-08-03 17:46:20,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 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) [2023-08-03 17:46:20,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 218.0) internal successors, (872), 4 states have internal predecessors, (872), 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) [2023-08-03 17:46:20,595 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 218.0) internal successors, (872), 4 states have internal predecessors, (872), 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) [2023-08-03 17:46:20,595 INFO L175 Difference]: Start difference. First operand has 58 places, 41 transitions, 129 flow. Second operand 3 states and 354 transitions. [2023-08-03 17:46:20,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 57 transitions, 264 flow [2023-08-03 17:46:20,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 57 transitions, 259 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 17:46:20,597 INFO L231 Difference]: Finished difference. Result has 58 places, 43 transitions, 145 flow [2023-08-03 17:46:20,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=218, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=145, PETRI_PLACES=58, PETRI_TRANSITIONS=43} [2023-08-03 17:46:20,599 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 9 predicate places. [2023-08-03 17:46:20,599 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 43 transitions, 145 flow [2023-08-03 17:46:20,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 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) [2023-08-03 17:46:20,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 17:46:20,600 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 17:46:20,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-03 17:46:20,600 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-03 17:46:20,600 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 17:46:20,600 INFO L85 PathProgramCache]: Analyzing trace with hash -235007266, now seen corresponding path program 1 times [2023-08-03 17:46:20,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 17:46:20,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388665060] [2023-08-03 17:46:20,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 17:46:20,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 17:46:20,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 17:46:20,661 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 17:46:20,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 17:46:20,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388665060] [2023-08-03 17:46:20,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388665060] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 17:46:20,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883391218] [2023-08-03 17:46:20,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 17:46:20,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 17:46:20,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 17:46:20,666 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 17:46:20,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-03 17:46:20,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 17:46:20,758 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 17:46:20,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 17:46:20,771 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 17:46:20,772 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 17:46:20,785 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 17:46:20,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883391218] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 17:46:20,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 17:46:20,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 17:46:20,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922342399] [2023-08-03 17:46:20,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 17:46:20,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 17:46:20,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 17:46:20,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 17:46:20,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 17:46:20,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 218 [2023-08-03 17:46:20,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 43 transitions, 145 flow. Second operand has 5 states, 5 states have (on average 102.2) internal successors, (511), 5 states have internal predecessors, (511), 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) [2023-08-03 17:46:20,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 17:46:20,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 218 [2023-08-03 17:46:20,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 17:46:22,046 INFO L124 PetriNetUnfolderBase]: 7690/10935 cut-off events. [2023-08-03 17:46:22,047 INFO L125 PetriNetUnfolderBase]: For 1747/1747 co-relation queries the response was YES. [2023-08-03 17:46:22,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24455 conditions, 10935 events. 7690/10935 cut-off events. For 1747/1747 co-relation queries the response was YES. Maximal size of possible extension queue 633. Compared 64972 event pairs, 3866 based on Foata normal form. 64/9823 useless extension candidates. Maximal degree in co-relation 11501. Up to 7209 conditions per place. [2023-08-03 17:46:22,080 INFO L140 encePairwiseOnDemand]: 214/218 looper letters, 55 selfloop transitions, 4 changer transitions 0/70 dead transitions. [2023-08-03 17:46:22,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 70 transitions, 334 flow [2023-08-03 17:46:22,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 17:46:22,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 17:46:22,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 451 transitions. [2023-08-03 17:46:22,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5172018348623854 [2023-08-03 17:46:22,084 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 451 transitions. [2023-08-03 17:46:22,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 451 transitions. [2023-08-03 17:46:22,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 17:46:22,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 451 transitions. [2023-08-03 17:46:22,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 112.75) internal successors, (451), 4 states have internal predecessors, (451), 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) [2023-08-03 17:46:22,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 218.0) internal successors, (1090), 5 states have internal predecessors, (1090), 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) [2023-08-03 17:46:22,087 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 218.0) internal successors, (1090), 5 states have internal predecessors, (1090), 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) [2023-08-03 17:46:22,088 INFO L175 Difference]: Start difference. First operand has 58 places, 43 transitions, 145 flow. Second operand 4 states and 451 transitions. [2023-08-03 17:46:22,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 70 transitions, 334 flow [2023-08-03 17:46:22,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 70 transitions, 328 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 17:46:22,091 INFO L231 Difference]: Finished difference. Result has 62 places, 44 transitions, 162 flow [2023-08-03 17:46:22,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=218, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=162, PETRI_PLACES=62, PETRI_TRANSITIONS=44} [2023-08-03 17:46:22,092 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 13 predicate places. [2023-08-03 17:46:22,092 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 44 transitions, 162 flow [2023-08-03 17:46:22,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 102.2) internal successors, (511), 5 states have internal predecessors, (511), 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) [2023-08-03 17:46:22,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 17:46:22,092 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 17:46:22,098 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-03 17:46:22,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 17:46:22,298 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting P1Err0ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-03 17:46:22,298 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 17:46:22,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1288519122, now seen corresponding path program 1 times [2023-08-03 17:46:22,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 17:46:22,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489176712] [2023-08-03 17:46:22,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 17:46:22,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 17:46:22,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 17:46:22,316 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 17:46:22,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 17:46:22,349 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 17:46:22,350 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 17:46:22,350 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location P1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2023-08-03 17:46:22,350 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location P1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-08-03 17:46:22,350 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-08-03 17:46:22,350 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 6 remaining) [2023-08-03 17:46:22,350 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 6 remaining) [2023-08-03 17:46:22,351 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location P1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-08-03 17:46:22,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-03 17:46:22,351 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-03 17:46:22,354 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-03 17:46:22,355 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-03 17:46:22,410 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.08 05:46:22 BasicIcfg [2023-08-03 17:46:22,410 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-03 17:46:22,411 INFO L158 Benchmark]: Toolchain (without parser) took 21192.42ms. Allocated memory was 509.6MB in the beginning and 3.0GB in the end (delta: 2.5GB). Free memory was 459.5MB in the beginning and 2.7GB in the end (delta: -2.2GB). Peak memory consumption was 289.5MB. Max. memory is 16.0GB. [2023-08-03 17:46:22,411 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 339.7MB. Free memory is still 292.1MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-03 17:46:22,411 INFO L158 Benchmark]: CACSL2BoogieTranslator took 414.41ms. Allocated memory is still 509.6MB. Free memory was 459.3MB in the beginning and 436.5MB in the end (delta: 22.7MB). Peak memory consumption was 23.1MB. Max. memory is 16.0GB. [2023-08-03 17:46:22,411 INFO L158 Benchmark]: Boogie Procedure Inliner took 76.29ms. Allocated memory is still 509.6MB. Free memory was 436.5MB in the beginning and 433.8MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 17:46:22,412 INFO L158 Benchmark]: Boogie Preprocessor took 32.15ms. Allocated memory is still 509.6MB. Free memory was 433.8MB in the beginning and 431.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 17:46:22,412 INFO L158 Benchmark]: RCFGBuilder took 646.55ms. Allocated memory is still 509.6MB. Free memory was 431.7MB in the beginning and 450.5MB in the end (delta: -18.8MB). Peak memory consumption was 14.9MB. Max. memory is 16.0GB. [2023-08-03 17:46:22,412 INFO L158 Benchmark]: TraceAbstraction took 20015.51ms. Allocated memory was 509.6MB in the beginning and 3.0GB in the end (delta: 2.5GB). Free memory was 450.0MB in the beginning and 2.7GB in the end (delta: -2.2GB). Peak memory consumption was 278.8MB. Max. memory is 16.0GB. [2023-08-03 17:46:22,414 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 339.7MB. Free memory is still 292.1MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 414.41ms. Allocated memory is still 509.6MB. Free memory was 459.3MB in the beginning and 436.5MB in the end (delta: 22.7MB). Peak memory consumption was 23.1MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 76.29ms. Allocated memory is still 509.6MB. Free memory was 436.5MB in the beginning and 433.8MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 32.15ms. Allocated memory is still 509.6MB. Free memory was 433.8MB in the beginning and 431.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 646.55ms. Allocated memory is still 509.6MB. Free memory was 431.7MB in the beginning and 450.5MB in the end (delta: -18.8MB). Peak memory consumption was 14.9MB. Max. memory is 16.0GB. * TraceAbstraction took 20015.51ms. Allocated memory was 509.6MB in the beginning and 3.0GB in the end (delta: 2.5GB). Free memory was 450.0MB in the beginning and 2.7GB in the end (delta: -2.2GB). Peak memory consumption was 278.8MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.5s, 105 PlacesBefore, 30 PlacesAfterwards, 104 TransitionsBefore, 25 TransitionsAfterwards, 1608 CoEnabledTransitionPairs, 7 FixpointIterations, 33 TrivialSequentialCompositions, 41 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 12 ConcurrentYvCompositions, 4 ChoiceCompositions, 90 TotalNumberOfCompositions, 4404 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2058, independent: 1892, independent conditional: 0, independent unconditional: 1892, dependent: 166, dependent conditional: 0, dependent unconditional: 166, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 869, independent: 822, independent conditional: 0, independent unconditional: 822, dependent: 47, dependent conditional: 0, dependent unconditional: 47, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2058, independent: 1070, independent conditional: 0, independent unconditional: 1070, dependent: 119, dependent conditional: 0, dependent unconditional: 119, unknown: 869, unknown conditional: 0, unknown unconditional: 869] , Statistics on independence cache: Total cache size (in pairs): 69, Positive cache size: 57, Positive conditional cache size: 0, Positive unconditional cache size: 57, Negative cache size: 12, Negative conditional cache size: 0, Negative unconditional cache size: 12, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.4s, 128 PlacesBefore, 49 PlacesAfterwards, 123 TransitionsBefore, 40 TransitionsAfterwards, 3856 CoEnabledTransitionPairs, 6 FixpointIterations, 33 TrivialSequentialCompositions, 46 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 12 ConcurrentYvCompositions, 4 ChoiceCompositions, 95 TotalNumberOfCompositions, 11897 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3872, independent: 3616, independent conditional: 0, independent unconditional: 3616, dependent: 256, dependent conditional: 0, dependent unconditional: 256, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1892, independent: 1824, independent conditional: 0, independent unconditional: 1824, dependent: 68, dependent conditional: 0, dependent unconditional: 68, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 3872, independent: 1792, independent conditional: 0, independent unconditional: 1792, dependent: 188, dependent conditional: 0, dependent unconditional: 188, unknown: 1892, unknown conditional: 0, unknown unconditional: 1892] , Statistics on independence cache: Total cache size (in pairs): 176, Positive cache size: 149, Positive conditional cache size: 0, Positive unconditional cache size: 149, Negative cache size: 27, Negative conditional cache size: 0, Negative unconditional cache size: 27, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L708] 0 int __unbuffered_cnt = 0; [L710] 0 int __unbuffered_p1_EAX = 0; [L712] 0 int __unbuffered_p1_EBX = 0; [L713] 0 _Bool main$tmp_guard0; [L714] 0 _Bool main$tmp_guard1; [L716] 0 int x = 0; [L717] 0 _Bool x$flush_delayed; [L718] 0 int x$mem_tmp; [L719] 0 _Bool x$r_buff0_thd0; [L720] 0 _Bool x$r_buff0_thd1; [L721] 0 _Bool x$r_buff0_thd2; [L722] 0 _Bool x$r_buff1_thd0; [L723] 0 _Bool x$r_buff1_thd1; [L724] 0 _Bool x$r_buff1_thd2; [L725] 0 _Bool x$read_delayed; [L726] 0 int *x$read_delayed_var; [L727] 0 int x$w_buff0; [L728] 0 _Bool x$w_buff0_used; [L729] 0 int x$w_buff1; [L730] 0 _Bool x$w_buff1_used; [L732] 0 int y = 0; [L733] 0 _Bool weak$$choice0; [L734] 0 _Bool weak$$choice2; [L800] 0 pthread_t t1587[2]; [L801] 0 int asdf=0; VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, __unbuffered_p1_EBX=0, asdf=0, main$tmp_guard0=0, main$tmp_guard1=0, t1587={5:0}, weak$$choice0=0, weak$$choice2=0, x$flush_delayed=0, x$mem_tmp=0, x$r_buff0_thd0=0, x$r_buff0_thd1=0, x$r_buff0_thd2=0, x$r_buff1_thd0=0, x$r_buff1_thd1=0, x$r_buff1_thd2=0, x$read_delayed=0, x$read_delayed_var={0:0}, x$w_buff0=0, x$w_buff0_used=0, x$w_buff1=0, x$w_buff1_used=0, x=0, y=0] [L801] COND TRUE 0 asdf<2 [L801] FCALL, FORK 0 pthread_create(&t1587[asdf], ((void *)0), P0, ((void *)0)) VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, __unbuffered_p1_EBX=0, arg={0:0}, asdf=0, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t1587[asdf], ((void *)0), P0, ((void *)0))=-3, t1587={5:0}, weak$$choice0=0, weak$$choice2=0, x$flush_delayed=0, x$mem_tmp=0, x$r_buff0_thd0=0, x$r_buff0_thd1=0, x$r_buff0_thd2=0, x$r_buff1_thd0=0, x$r_buff1_thd1=0, x$r_buff1_thd2=0, x$read_delayed=0, x$read_delayed_var={0:0}, x$w_buff0=0, x$w_buff0_used=0, x$w_buff1=0, x$w_buff1_used=0, x=0, y=0] [L801] 0 asdf++ VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, __unbuffered_p1_EBX=0, arg={0:0}, asdf=1, main$tmp_guard0=0, main$tmp_guard1=0, t1587={5:0}, weak$$choice0=0, weak$$choice2=0, x$flush_delayed=0, x$mem_tmp=0, x$r_buff0_thd0=0, x$r_buff0_thd1=0, x$r_buff0_thd2=0, x$r_buff1_thd0=0, x$r_buff1_thd1=0, x$r_buff1_thd2=0, x$read_delayed=0, x$read_delayed_var={0:0}, x$w_buff0=0, x$w_buff0_used=0, x$w_buff1=0, x$w_buff1_used=0, x=0, y=0] [L801] COND TRUE 0 asdf<2 [L801] FCALL, FORK 0 pthread_create(&t1587[asdf], ((void *)0), P0, ((void *)0)) VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, __unbuffered_p1_EBX=0, arg={0:0}, asdf=1, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t1587[asdf], ((void *)0), P0, ((void *)0))=-2, t1587={5:0}, weak$$choice0=0, weak$$choice2=0, x$flush_delayed=0, x$mem_tmp=0, x$r_buff0_thd0=0, x$r_buff0_thd1=0, x$r_buff0_thd2=0, x$r_buff1_thd0=0, x$r_buff1_thd1=0, x$r_buff1_thd2=0, x$read_delayed=0, x$read_delayed_var={0:0}, x$w_buff0=0, x$w_buff0_used=0, x$w_buff1=0, x$w_buff1_used=0, x=0, y=0] [L801] 0 asdf++ VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, __unbuffered_p1_EBX=0, arg={0:0}, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, t1587={5:0}, weak$$choice0=0, weak$$choice2=0, x$flush_delayed=0, x$mem_tmp=0, x$r_buff0_thd0=0, x$r_buff0_thd1=0, x$r_buff0_thd2=0, x$r_buff1_thd0=0, x$r_buff1_thd1=0, x$r_buff1_thd2=0, x$read_delayed=0, x$read_delayed_var={0:0}, x$w_buff0=0, x$w_buff0_used=0, x$w_buff1=0, x$w_buff1_used=0, x=0, y=0] [L801] COND FALSE 0 !(asdf<2) [L802] 0 pthread_t t1588[2]; [L803] 0 int asdf=0; VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, __unbuffered_p1_EBX=0, arg={0:0}, asdf=0, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, t1587={5:0}, t1588={3:0}, weak$$choice0=0, weak$$choice2=0, x$flush_delayed=0, x$mem_tmp=0, x$r_buff0_thd0=0, x$r_buff0_thd1=0, x$r_buff0_thd2=0, x$r_buff1_thd0=0, x$r_buff1_thd1=0, x$r_buff1_thd2=0, x$read_delayed=0, x$read_delayed_var={0:0}, x$w_buff0=0, x$w_buff0_used=0, x$w_buff1=0, x$w_buff1_used=0, x=0, y=0] [L803] COND TRUE 0 asdf<2 [L803] FCALL, FORK 0 pthread_create(&t1588[asdf], ((void *)0), P1, ((void *)0)) VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, __unbuffered_p1_EBX=0, arg={0:0}, asdf=0, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t1588[asdf], ((void *)0), P1, ((void *)0))=-1, t1587={5:0}, t1588={3:0}, weak$$choice0=0, weak$$choice2=0, x$flush_delayed=0, x$mem_tmp=0, x$r_buff0_thd0=0, x$r_buff0_thd1=0, x$r_buff0_thd2=0, x$r_buff1_thd0=0, x$r_buff1_thd1=0, x$r_buff1_thd2=0, x$read_delayed=0, x$read_delayed_var={0:0}, x$w_buff0=0, x$w_buff0_used=0, x$w_buff1=0, x$w_buff1_used=0, x=0, y=0] [L758] 3 x$w_buff1 = x$w_buff0 [L759] 3 x$w_buff0 = 2 [L760] 3 x$w_buff1_used = x$w_buff0_used [L761] 3 x$w_buff0_used = (_Bool)1 [L762] CALL 3 __VERIFIER_assert(!(x$w_buff1_used && x$w_buff0_used)) [L18] COND FALSE 3 !(!expression) [L762] RET 3 __VERIFIER_assert(!(x$w_buff1_used && x$w_buff0_used)) [L763] 3 x$r_buff1_thd0 = x$r_buff0_thd0 [L764] 3 x$r_buff1_thd1 = x$r_buff0_thd1 [L765] 3 x$r_buff1_thd2 = x$r_buff0_thd2 [L766] 3 x$r_buff0_thd2 = (_Bool)1 VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, __unbuffered_p1_EBX=0, arg={0:0}, arg={0:0}, arg={0:0}, main$tmp_guard0=0, main$tmp_guard1=0, weak$$choice0=0, weak$$choice2=0, x$flush_delayed=0, x$mem_tmp=0, x$r_buff0_thd0=0, x$r_buff0_thd1=0, x$r_buff0_thd2=1, x$r_buff1_thd0=0, x$r_buff1_thd1=0, x$r_buff1_thd2=0, x$read_delayed=0, x$read_delayed_var={0:0}, x$w_buff0=2, x$w_buff0_used=1, x$w_buff1=0, x$w_buff1_used=0, x=0, y=0] [L803] 0 asdf++ VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, __unbuffered_p1_EBX=0, arg={0:0}, asdf=1, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, t1587={5:0}, t1588={3:0}, weak$$choice0=0, weak$$choice2=0, x$flush_delayed=0, x$mem_tmp=0, x$r_buff0_thd0=0, x$r_buff0_thd1=0, x$r_buff0_thd2=1, x$r_buff1_thd0=0, x$r_buff1_thd1=0, x$r_buff1_thd2=0, x$read_delayed=0, x$read_delayed_var={0:0}, x$w_buff0=2, x$w_buff0_used=1, x$w_buff1=0, x$w_buff1_used=0, x=0, y=0] [L803] COND TRUE 0 asdf<2 [L803] FCALL, FORK 0 pthread_create(&t1588[asdf], ((void *)0), P1, ((void *)0)) VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, __unbuffered_p1_EBX=0, arg={0:0}, asdf=1, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t1588[asdf], ((void *)0), P1, ((void *)0))=0, t1587={5:0}, t1588={3:0}, weak$$choice0=0, weak$$choice2=0, x$flush_delayed=0, x$mem_tmp=0, x$r_buff0_thd0=0, x$r_buff0_thd1=0, x$r_buff0_thd2=1, x$r_buff1_thd0=0, x$r_buff1_thd1=0, x$r_buff1_thd2=0, x$read_delayed=0, x$read_delayed_var={0:0}, x$w_buff0=2, x$w_buff0_used=1, x$w_buff1=0, x$w_buff1_used=0, x=0, y=0] [L758] 4 x$w_buff1 = x$w_buff0 [L759] 4 x$w_buff0 = 2 [L760] 4 x$w_buff1_used = x$w_buff0_used [L761] 4 x$w_buff0_used = (_Bool)1 [L762] CALL 4 __VERIFIER_assert(!(x$w_buff1_used && x$w_buff0_used)) [L18] COND TRUE 4 !expression [L18] 4 reach_error() VAL [\old(expression)=0, __unbuffered_cnt=0, __unbuffered_p1_EAX=0, __unbuffered_p1_EBX=0, arg={0:0}, expression=0, main$tmp_guard0=0, main$tmp_guard1=0, weak$$choice0=0, weak$$choice2=0, x$flush_delayed=0, x$mem_tmp=0, x$r_buff0_thd0=0, x$r_buff0_thd1=0, x$r_buff0_thd2=1, x$r_buff1_thd0=0, x$r_buff1_thd1=0, x$r_buff1_thd2=0, x$read_delayed=0, x$read_delayed_var={0:0}, x$w_buff0=2, x$w_buff0_used=1, x$w_buff1=2, x$w_buff1_used=1, x=0, y=0] - UnprovableResult [Line: 18]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 803]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 801]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 120 locations, 5 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 4.3s, OverallIterations: 2, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.6s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 16 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 9 mSDsluCounter, 1 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 3 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 44 IncrementalHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3 mSolverCounterUnsat, 1 mSDtfsCounter, 44 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=68occurred in iteration=1, InterpolantAutomatonStates: 3, 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: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 11 NumberOfCodeBlocks, 11 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 4 ConstructedInterpolants, 0 QuantifiedInterpolants, 6 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 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 - StatisticsResult: Ultimate Automizer benchmark data with 2 thread instances CFG has 7 procedures, 139 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 15.6s, OverallIterations: 7, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 10.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.5s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 196 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 149 mSDsluCounter, 14 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 22 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 438 IncrementalHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 22 mSolverCounterUnsat, 14 mSDtfsCounter, 438 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 83 GetRequests, 64 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=162occurred in iteration=6, InterpolantAutomatonStates: 22, 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, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 128 NumberOfCodeBlocks, 128 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 124 ConstructedInterpolants, 0 QuantifiedInterpolants, 306 SizeOfPredicates, 0 NumberOfNonLiveVariables, 630 ConjunctsInSsa, 12 ConjunctsInUnsatCore, 12 InterpolantComputations, 4 PerfectInterpolantSequences, 36/48 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 RESULT: Ultimate proved your program to be incorrect! [2023-08-03 17:46:22,433 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...