/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 INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe021_power.opt_pso.opt_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 00:50:56,691 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 00:50:56,755 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 00:50:56,763 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 00:50:56,764 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 00:50:56,764 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 00:50:56,765 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 00:50:56,800 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 00:50:56,800 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 00:50:56,804 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 00:50:56,804 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 00:50:56,804 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 00:50:56,805 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 00:50:56,806 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 00:50:56,807 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 00:50:56,807 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 00:50:56,807 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 00:50:56,807 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 00:50:56,807 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 00:50:56,808 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 00:50:56,808 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 00:50:56,808 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 00:50:56,808 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 00:50:56,809 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 00:50:56,809 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 00:50:56,810 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 00:50:56,810 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 00:50:56,811 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 00:50:56,811 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 00:50:56,811 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 00:50:56,812 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 00:50:56,812 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 00:50:56,812 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 00:50:56,812 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 00:50:56,812 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 00:50:56,813 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 00:50:56,813 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 00:50:56,813 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 00:50:56,813 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 00:50:56,813 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 00:50:56,813 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 00:50:56,813 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 00:50:57,050 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 00:50:57,071 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 00:50:57,073 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 00:50:57,074 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 00:50:57,074 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 00:50:57,075 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe021_power.opt_pso.opt_bound2.i [2023-08-04 00:50:58,255 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 00:50:58,503 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 00:50:58,504 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe021_power.opt_pso.opt_bound2.i [2023-08-04 00:50:58,528 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e38a7042/69b5ef097f954e09b10bba8755bb724a/FLAGdc4ad2c02 [2023-08-04 00:50:58,546 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e38a7042/69b5ef097f954e09b10bba8755bb724a [2023-08-04 00:50:58,551 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 00:50:58,552 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 00:50:58,555 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 00:50:58,556 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 00:50:58,559 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 00:50:58,559 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 12:50:58" (1/1) ... [2023-08-04 00:50:58,560 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fbf36ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:50:58, skipping insertion in model container [2023-08-04 00:50:58,560 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 12:50:58" (1/1) ... [2023-08-04 00:50:58,614 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 00:50:58,777 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_safe021_power.opt_pso.opt_bound2.i[959,972] [2023-08-04 00:50:58,947 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 00:50:58,958 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 00:50:58,973 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_safe021_power.opt_pso.opt_bound2.i[959,972] [2023-08-04 00:50:59,002 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 00:50:59,003 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 00:50:59,032 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 00:50:59,055 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 00:50:59,056 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 00:50:59,062 INFO L206 MainTranslator]: Completed translation [2023-08-04 00:50:59,062 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:50:59 WrapperNode [2023-08-04 00:50:59,062 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 00:50:59,063 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 00:50:59,063 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 00:50:59,063 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 00:50:59,069 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:50:59" (1/1) ... [2023-08-04 00:50:59,086 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:50:59" (1/1) ... [2023-08-04 00:50:59,118 INFO L138 Inliner]: procedures = 176, calls = 54, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 169 [2023-08-04 00:50:59,118 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 00:50:59,119 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 00:50:59,119 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 00:50:59,119 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 00:50:59,127 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:50:59" (1/1) ... [2023-08-04 00:50:59,128 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:50:59" (1/1) ... [2023-08-04 00:50:59,131 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:50:59" (1/1) ... [2023-08-04 00:50:59,131 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:50:59" (1/1) ... [2023-08-04 00:50:59,139 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:50:59" (1/1) ... [2023-08-04 00:50:59,142 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:50:59" (1/1) ... [2023-08-04 00:50:59,144 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:50:59" (1/1) ... [2023-08-04 00:50:59,145 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:50:59" (1/1) ... [2023-08-04 00:50:59,148 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 00:50:59,149 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 00:50:59,150 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 00:50:59,150 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 00:50:59,150 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:50:59" (1/1) ... [2023-08-04 00:50:59,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 00:50:59,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:50:59,182 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) [2023-08-04 00:50:59,184 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 [2023-08-04 00:50:59,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 00:50:59,218 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 00:50:59,218 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 00:50:59,218 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 00:50:59,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 00:50:59,218 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 00:50:59,218 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 00:50:59,218 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 00:50:59,218 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 00:50:59,218 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-04 00:50:59,219 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-04 00:50:59,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 00:50:59,219 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 00:50:59,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 00:50:59,219 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 00:50:59,220 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 00:50:59,333 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 00:50:59,335 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 00:50:59,618 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 00:50:59,759 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 00:50:59,759 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-04 00:50:59,762 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 12:50:59 BoogieIcfgContainer [2023-08-04 00:50:59,762 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 00:50:59,765 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 00:50:59,765 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 00:50:59,768 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 00:50:59,769 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 12:50:58" (1/3) ... [2023-08-04 00:50:59,770 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51025352 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 12:50:59, skipping insertion in model container [2023-08-04 00:50:59,771 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:50:59" (2/3) ... [2023-08-04 00:50:59,771 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51025352 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 12:50:59, skipping insertion in model container [2023-08-04 00:50:59,771 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 12:50:59" (3/3) ... [2023-08-04 00:50:59,772 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe021_power.opt_pso.opt_bound2.i [2023-08-04 00:50:59,779 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 00:50:59,787 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 00:50:59,787 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-04 00:50:59,788 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 00:50:59,842 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 00:50:59,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 131 places, 129 transitions, 273 flow [2023-08-04 00:51:00,045 INFO L124 PetriNetUnfolderBase]: 30/449 cut-off events. [2023-08-04 00:51:00,046 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:51:00,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 474 conditions, 449 events. 30/449 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1977 event pairs, 0 based on Foata normal form. 0/395 useless extension candidates. Maximal degree in co-relation 270. Up to 16 conditions per place. [2023-08-04 00:51:00,052 INFO L82 GeneralOperation]: Start removeDead. Operand has 131 places, 129 transitions, 273 flow [2023-08-04 00:51:00,056 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 100 transitions, 215 flow [2023-08-04 00:51:00,058 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:51:00,071 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 105 places, 100 transitions, 215 flow [2023-08-04 00:51:00,075 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 105 places, 100 transitions, 215 flow [2023-08-04 00:51:00,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 100 transitions, 215 flow [2023-08-04 00:51:00,100 INFO L124 PetriNetUnfolderBase]: 6/217 cut-off events. [2023-08-04 00:51:00,100 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:51:00,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 242 conditions, 217 events. 6/217 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 642 event pairs, 0 based on Foata normal form. 0/203 useless extension candidates. Maximal degree in co-relation 154. Up to 8 conditions per place. [2023-08-04 00:51:00,104 INFO L119 LiptonReduction]: Number of co-enabled transitions 1422 [2023-08-04 00:51:03,019 INFO L134 LiptonReduction]: Checked pairs total: 3753 [2023-08-04 00:51:03,019 INFO L136 LiptonReduction]: Total number of compositions: 79 [2023-08-04 00:51:03,031 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 00:51:03,036 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;@60109ee5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:51:03,036 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 00:51:03,041 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:51:03,041 INFO L124 PetriNetUnfolderBase]: 0/22 cut-off events. [2023-08-04 00:51:03,041 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:51:03,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:51:03,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 00:51:03,042 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:51:03,046 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:51:03,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1459305967, now seen corresponding path program 1 times [2023-08-04 00:51:03,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:51:03,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167493515] [2023-08-04 00:51:03,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:51:03,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:51:03,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:51:03,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 00:51:03,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:51:03,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167493515] [2023-08-04 00:51:03,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167493515] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:51:03,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:51:03,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:51:03,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205789431] [2023-08-04 00:51:03,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:51:03,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:51:03,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:51:03,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:51:03,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:51:03,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 208 [2023-08-04 00:51:03,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 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) [2023-08-04 00:51:03,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:51:03,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 208 [2023-08-04 00:51:03,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:51:03,500 INFO L124 PetriNetUnfolderBase]: 467/874 cut-off events. [2023-08-04 00:51:03,500 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-04 00:51:03,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1770 conditions, 874 events. 467/874 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4545 event pairs, 248 based on Foata normal form. 0/770 useless extension candidates. Maximal degree in co-relation 1749. Up to 760 conditions per place. [2023-08-04 00:51:03,512 INFO L140 encePairwiseOnDemand]: 205/208 looper letters, 23 selfloop transitions, 2 changer transitions 0/31 dead transitions. [2023-08-04 00:51:03,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 31 transitions, 127 flow [2023-08-04 00:51:03,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:51:03,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:51:03,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 353 transitions. [2023-08-04 00:51:03,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5657051282051282 [2023-08-04 00:51:03,532 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 353 transitions. [2023-08-04 00:51:03,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 353 transitions. [2023-08-04 00:51:03,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:51:03,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 353 transitions. [2023-08-04 00:51:03,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 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) [2023-08-04 00:51:03,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 208.0) internal successors, (832), 4 states have internal predecessors, (832), 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) [2023-08-04 00:51:03,548 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 208.0) internal successors, (832), 4 states have internal predecessors, (832), 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) [2023-08-04 00:51:03,550 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 69 flow. Second operand 3 states and 353 transitions. [2023-08-04 00:51:03,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 31 transitions, 127 flow [2023-08-04 00:51:03,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 31 transitions, 127 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 00:51:03,554 INFO L231 Difference]: Finished difference. Result has 37 places, 27 transitions, 77 flow [2023-08-04 00:51:03,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=208, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=77, PETRI_PLACES=37, PETRI_TRANSITIONS=27} [2023-08-04 00:51:03,559 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 3 predicate places. [2023-08-04 00:51:03,559 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 27 transitions, 77 flow [2023-08-04 00:51:03,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 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) [2023-08-04 00:51:03,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:51:03,560 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 00:51:03,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 00:51:03,560 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:51:03,567 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:51:03,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1464216303, now seen corresponding path program 1 times [2023-08-04 00:51:03,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:51:03,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644931705] [2023-08-04 00:51:03,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:51:03,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:51:03,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 00:51:03,622 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 00:51:03,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 00:51:03,659 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 00:51:03,659 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 00:51:03,665 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 00:51:03,667 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 00:51:03,667 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 00:51:03,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 00:51:03,667 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 00:51:03,669 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-04 00:51:03,670 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 00:51:03,670 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 00:51:03,700 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 00:51:03,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 154 transitions, 344 flow [2023-08-04 00:51:03,856 INFO L124 PetriNetUnfolderBase]: 93/1381 cut-off events. [2023-08-04 00:51:03,857 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 00:51:03,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1479 conditions, 1381 events. 93/1381 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 9569 event pairs, 0 based on Foata normal form. 0/1216 useless extension candidates. Maximal degree in co-relation 1004. Up to 54 conditions per place. [2023-08-04 00:51:03,864 INFO L82 GeneralOperation]: Start removeDead. Operand has 162 places, 154 transitions, 344 flow [2023-08-04 00:51:03,866 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 136 places, 125 transitions, 286 flow [2023-08-04 00:51:03,866 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:51:03,866 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 136 places, 125 transitions, 286 flow [2023-08-04 00:51:03,867 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 136 places, 125 transitions, 286 flow [2023-08-04 00:51:03,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 125 transitions, 286 flow [2023-08-04 00:51:03,953 INFO L124 PetriNetUnfolderBase]: 12/598 cut-off events. [2023-08-04 00:51:03,953 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 00:51:03,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 696 conditions, 598 events. 12/598 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3072 event pairs, 0 based on Foata normal form. 0/568 useless extension candidates. Maximal degree in co-relation 482. Up to 27 conditions per place. [2023-08-04 00:51:03,964 INFO L119 LiptonReduction]: Number of co-enabled transitions 3944 [2023-08-04 00:51:06,781 INFO L134 LiptonReduction]: Checked pairs total: 12620 [2023-08-04 00:51:06,782 INFO L136 LiptonReduction]: Total number of compositions: 86 [2023-08-04 00:51:06,784 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 00:51:06,785 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;@60109ee5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:51:06,785 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 00:51:06,790 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:51:06,791 INFO L124 PetriNetUnfolderBase]: 0/61 cut-off events. [2023-08-04 00:51:06,791 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-04 00:51:06,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:51:06,791 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 00:51:06,791 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:51:06,792 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:51:06,792 INFO L85 PathProgramCache]: Analyzing trace with hash 290165847, now seen corresponding path program 1 times [2023-08-04 00:51:06,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:51:06,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724286543] [2023-08-04 00:51:06,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:51:06,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:51:06,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:51:06,882 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 00:51:06,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:51:06,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724286543] [2023-08-04 00:51:06,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724286543] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:51:06,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:51:06,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:51:06,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035594455] [2023-08-04 00:51:06,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:51:06,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:51:06,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:51:06,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:51:06,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:51:06,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 240 [2023-08-04 00:51:06,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 46 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 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) [2023-08-04 00:51:06,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:51:06,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 240 [2023-08-04 00:51:06,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:51:18,552 INFO L124 PetriNetUnfolderBase]: 99287/133675 cut-off events. [2023-08-04 00:51:18,552 INFO L125 PetriNetUnfolderBase]: For 8636/8636 co-relation queries the response was YES. [2023-08-04 00:51:18,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 270454 conditions, 133675 events. 99287/133675 cut-off events. For 8636/8636 co-relation queries the response was YES. Maximal size of possible extension queue 3967. Compared 905442 event pairs, 78800 based on Foata normal form. 0/121535 useless extension candidates. Maximal degree in co-relation 62718. Up to 126604 conditions per place. [2023-08-04 00:51:19,718 INFO L140 encePairwiseOnDemand]: 237/240 looper letters, 37 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2023-08-04 00:51:19,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 51 transitions, 216 flow [2023-08-04 00:51:19,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:51:19,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:51:19,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 418 transitions. [2023-08-04 00:51:19,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5805555555555556 [2023-08-04 00:51:19,720 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 418 transitions. [2023-08-04 00:51:19,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 418 transitions. [2023-08-04 00:51:19,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:51:19,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 418 transitions. [2023-08-04 00:51:19,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 139.33333333333334) internal successors, (418), 3 states have internal predecessors, (418), 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) [2023-08-04 00:51:19,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 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) [2023-08-04 00:51:19,724 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 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) [2023-08-04 00:51:19,724 INFO L175 Difference]: Start difference. First operand has 59 places, 46 transitions, 128 flow. Second operand 3 states and 418 transitions. [2023-08-04 00:51:19,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 51 transitions, 216 flow [2023-08-04 00:51:19,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 51 transitions, 210 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-04 00:51:19,735 INFO L231 Difference]: Finished difference. Result has 62 places, 47 transitions, 134 flow [2023-08-04 00:51:19,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=62, PETRI_TRANSITIONS=47} [2023-08-04 00:51:19,736 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 3 predicate places. [2023-08-04 00:51:19,736 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 47 transitions, 134 flow [2023-08-04 00:51:19,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 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) [2023-08-04 00:51:19,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:51:19,737 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 00:51:19,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 00:51:19,737 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:51:19,738 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:51:19,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1841766699, now seen corresponding path program 1 times [2023-08-04 00:51:19,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:51:19,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961767559] [2023-08-04 00:51:19,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:51:19,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:51:19,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:51:19,796 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:51:19,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:51:19,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961767559] [2023-08-04 00:51:19,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961767559] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:51:19,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87061030] [2023-08-04 00:51:19,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:51:19,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:51:19,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:51:19,811 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) [2023-08-04 00:51:19,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 00:51:19,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:51:19,907 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 00:51:19,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:51:19,980 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:51:19,980 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:51:19,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87061030] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:51:19,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:51:19,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 00:51:19,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969843786] [2023-08-04 00:51:19,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:51:19,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:51:19,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:51:19,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:51:19,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 00:51:20,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 240 [2023-08-04 00:51:20,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 47 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 126.6) internal successors, (633), 5 states have internal predecessors, (633), 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) [2023-08-04 00:51:20,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:51:20,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 240 [2023-08-04 00:51:20,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:51:30,557 INFO L124 PetriNetUnfolderBase]: 99263/133799 cut-off events. [2023-08-04 00:51:30,558 INFO L125 PetriNetUnfolderBase]: For 7984/7984 co-relation queries the response was YES. [2023-08-04 00:51:30,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 270077 conditions, 133799 events. 99263/133799 cut-off events. For 7984/7984 co-relation queries the response was YES. Maximal size of possible extension queue 3974. Compared 909098 event pairs, 62420 based on Foata normal form. 16/121715 useless extension candidates. Maximal degree in co-relation 70922. Up to 126521 conditions per place. [2023-08-04 00:51:31,382 INFO L140 encePairwiseOnDemand]: 236/240 looper letters, 42 selfloop transitions, 4 changer transitions 0/57 dead transitions. [2023-08-04 00:51:31,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 57 transitions, 246 flow [2023-08-04 00:51:31,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 00:51:31,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 00:51:31,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 672 transitions. [2023-08-04 00:51:31,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56 [2023-08-04 00:51:31,385 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 672 transitions. [2023-08-04 00:51:31,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 672 transitions. [2023-08-04 00:51:31,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:51:31,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 672 transitions. [2023-08-04 00:51:31,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 134.4) internal successors, (672), 5 states have internal predecessors, (672), 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) [2023-08-04 00:51:31,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 240.0) internal successors, (1440), 6 states have internal predecessors, (1440), 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) [2023-08-04 00:51:31,391 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 240.0) internal successors, (1440), 6 states have internal predecessors, (1440), 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) [2023-08-04 00:51:31,391 INFO L175 Difference]: Start difference. First operand has 62 places, 47 transitions, 134 flow. Second operand 5 states and 672 transitions. [2023-08-04 00:51:31,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 57 transitions, 246 flow [2023-08-04 00:51:31,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 57 transitions, 243 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 00:51:31,400 INFO L231 Difference]: Finished difference. Result has 65 places, 47 transitions, 148 flow [2023-08-04 00:51:31,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=148, PETRI_PLACES=65, PETRI_TRANSITIONS=47} [2023-08-04 00:51:31,401 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 6 predicate places. [2023-08-04 00:51:31,401 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 47 transitions, 148 flow [2023-08-04 00:51:31,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 126.6) internal successors, (633), 5 states have internal predecessors, (633), 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) [2023-08-04 00:51:31,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:51:31,402 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:51:31,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 00:51:31,607 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 [2023-08-04 00:51:31,607 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:51:31,608 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:51:31,608 INFO L85 PathProgramCache]: Analyzing trace with hash 708391920, now seen corresponding path program 1 times [2023-08-04 00:51:31,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:51:31,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21230353] [2023-08-04 00:51:31,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:51:31,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:51:31,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:51:31,663 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 00:51:31,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:51:31,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21230353] [2023-08-04 00:51:31,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21230353] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:51:31,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036821648] [2023-08-04 00:51:31,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:51:31,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:51:31,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:51:31,671 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) [2023-08-04 00:51:31,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 00:51:31,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:51:31,770 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 00:51:31,772 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:51:31,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:51:31,783 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:51:31,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036821648] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:51:31,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:51:31,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 00:51:31,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921772554] [2023-08-04 00:51:31,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:51:31,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:51:31,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:51:31,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:51:31,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:51:31,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 240 [2023-08-04 00:51:31,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 47 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 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) [2023-08-04 00:51:31,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:51:31,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 240 [2023-08-04 00:51:31,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:51:42,291 INFO L124 PetriNetUnfolderBase]: 97376/133717 cut-off events. [2023-08-04 00:51:42,291 INFO L125 PetriNetUnfolderBase]: For 7483/7483 co-relation queries the response was YES. [2023-08-04 00:51:42,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 268051 conditions, 133717 events. 97376/133717 cut-off events. For 7483/7483 co-relation queries the response was YES. Maximal size of possible extension queue 4176. Compared 943519 event pairs, 76147 based on Foata normal form. 0/122837 useless extension candidates. Maximal degree in co-relation 105077. Up to 123534 conditions per place. [2023-08-04 00:51:43,168 INFO L140 encePairwiseOnDemand]: 237/240 looper letters, 45 selfloop transitions, 3 changer transitions 0/59 dead transitions. [2023-08-04 00:51:43,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 59 transitions, 268 flow [2023-08-04 00:51:43,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:51:43,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:51:43,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 425 transitions. [2023-08-04 00:51:43,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5902777777777778 [2023-08-04 00:51:43,171 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 425 transitions. [2023-08-04 00:51:43,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 425 transitions. [2023-08-04 00:51:43,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:51:43,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 425 transitions. [2023-08-04 00:51:43,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 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) [2023-08-04 00:51:43,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 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) [2023-08-04 00:51:43,174 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 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) [2023-08-04 00:51:43,175 INFO L175 Difference]: Start difference. First operand has 65 places, 47 transitions, 148 flow. Second operand 3 states and 425 transitions. [2023-08-04 00:51:43,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 59 transitions, 268 flow [2023-08-04 00:51:43,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 59 transitions, 261 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-04 00:51:43,177 INFO L231 Difference]: Finished difference. Result has 66 places, 48 transitions, 156 flow [2023-08-04 00:51:43,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=66, PETRI_TRANSITIONS=48} [2023-08-04 00:51:43,178 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 7 predicate places. [2023-08-04 00:51:43,178 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 48 transitions, 156 flow [2023-08-04 00:51:43,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 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) [2023-08-04 00:51:43,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:51:43,179 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:51:43,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 00:51:43,387 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 [2023-08-04 00:51:43,387 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:51:43,388 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:51:43,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1282575728, now seen corresponding path program 1 times [2023-08-04 00:51:43,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:51:43,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630189807] [2023-08-04 00:51:43,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:51:43,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:51:43,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:51:43,444 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 00:51:43,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:51:43,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630189807] [2023-08-04 00:51:43,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630189807] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:51:43,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949544506] [2023-08-04 00:51:43,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:51:43,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:51:43,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:51:43,447 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) [2023-08-04 00:51:43,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 00:51:43,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:51:43,552 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:51:43,553 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:51:43,568 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 00:51:43,568 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:51:43,589 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 00:51:43,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949544506] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:51:43,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:51:43,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 00:51:43,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734678361] [2023-08-04 00:51:43,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:51:43,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:51:43,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:51:43,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:51:43,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:51:43,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 240 [2023-08-04 00:51:43,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 48 transitions, 156 flow. Second operand has 5 states, 5 states have (on average 127.6) internal successors, (638), 5 states have internal predecessors, (638), 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) [2023-08-04 00:51:43,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:51:43,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 240 [2023-08-04 00:51:43,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:51:51,985 INFO L124 PetriNetUnfolderBase]: 81082/110130 cut-off events. [2023-08-04 00:51:51,986 INFO L125 PetriNetUnfolderBase]: For 7064/7064 co-relation queries the response was YES. [2023-08-04 00:51:52,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221826 conditions, 110130 events. 81082/110130 cut-off events. For 7064/7064 co-relation queries the response was YES. Maximal size of possible extension queue 3711. Compared 745383 event pairs, 49312 based on Foata normal form. 4/101942 useless extension candidates. Maximal degree in co-relation 58083. Up to 102233 conditions per place. [2023-08-04 00:51:52,723 INFO L140 encePairwiseOnDemand]: 237/240 looper letters, 43 selfloop transitions, 3 changer transitions 0/57 dead transitions. [2023-08-04 00:51:52,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 57 transitions, 261 flow [2023-08-04 00:51:52,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:51:52,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:51:52,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 546 transitions. [2023-08-04 00:51:52,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56875 [2023-08-04 00:51:52,726 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 546 transitions. [2023-08-04 00:51:52,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 546 transitions. [2023-08-04 00:51:52,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:51:52,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 546 transitions. [2023-08-04 00:51:52,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 136.5) internal successors, (546), 4 states have internal predecessors, (546), 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) [2023-08-04 00:51:52,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 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) [2023-08-04 00:51:52,730 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 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) [2023-08-04 00:51:52,730 INFO L175 Difference]: Start difference. First operand has 66 places, 48 transitions, 156 flow. Second operand 4 states and 546 transitions. [2023-08-04 00:51:52,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 57 transitions, 261 flow [2023-08-04 00:51:52,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 57 transitions, 259 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:51:52,734 INFO L231 Difference]: Finished difference. Result has 68 places, 47 transitions, 151 flow [2023-08-04 00:51:52,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=151, PETRI_PLACES=68, PETRI_TRANSITIONS=47} [2023-08-04 00:51:52,735 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 9 predicate places. [2023-08-04 00:51:52,735 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 47 transitions, 151 flow [2023-08-04 00:51:52,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 127.6) internal successors, (638), 5 states have internal predecessors, (638), 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) [2023-08-04 00:51:52,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:51:52,736 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:51:52,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 00:51:52,944 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 [2023-08-04 00:51:52,945 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:51:52,945 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:51:52,945 INFO L85 PathProgramCache]: Analyzing trace with hash 620692744, now seen corresponding path program 1 times [2023-08-04 00:51:52,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:51:52,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147805085] [2023-08-04 00:51:52,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:51:52,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:51:52,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:51:53,023 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:51:53,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:51:53,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147805085] [2023-08-04 00:51:53,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147805085] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:51:53,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114384084] [2023-08-04 00:51:53,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:51:53,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:51:53,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:51:53,025 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) [2023-08-04 00:51:53,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 00:51:53,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:51:53,110 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 00:51:53,111 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:51:53,133 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:51:53,133 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:51:53,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114384084] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:51:53,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:51:53,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 00:51:53,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832351440] [2023-08-04 00:51:53,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:51:53,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:51:53,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:51:53,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:51:53,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 00:51:53,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 240 [2023-08-04 00:51:53,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 47 transitions, 151 flow. Second operand has 5 states, 5 states have (on average 127.6) internal successors, (638), 5 states have internal predecessors, (638), 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) [2023-08-04 00:51:53,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:51:53,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 240 [2023-08-04 00:51:53,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:52:01,425 INFO L124 PetriNetUnfolderBase]: 79842/109007 cut-off events. [2023-08-04 00:52:01,426 INFO L125 PetriNetUnfolderBase]: For 5567/5567 co-relation queries the response was YES. [2023-08-04 00:52:01,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219180 conditions, 109007 events. 79842/109007 cut-off events. For 5567/5567 co-relation queries the response was YES. Maximal size of possible extension queue 3755. Compared 750980 event pairs, 18762 based on Foata normal form. 400/101343 useless extension candidates. Maximal degree in co-relation 104345. Up to 98424 conditions per place. [2023-08-04 00:52:02,176 INFO L140 encePairwiseOnDemand]: 236/240 looper letters, 64 selfloop transitions, 4 changer transitions 0/78 dead transitions. [2023-08-04 00:52:02,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 78 transitions, 349 flow [2023-08-04 00:52:02,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 00:52:02,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 00:52:02,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 693 transitions. [2023-08-04 00:52:02,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5775 [2023-08-04 00:52:02,179 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 693 transitions. [2023-08-04 00:52:02,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 693 transitions. [2023-08-04 00:52:02,179 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:52:02,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 693 transitions. [2023-08-04 00:52:02,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 138.6) internal successors, (693), 5 states have internal predecessors, (693), 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) [2023-08-04 00:52:02,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 240.0) internal successors, (1440), 6 states have internal predecessors, (1440), 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) [2023-08-04 00:52:02,183 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 240.0) internal successors, (1440), 6 states have internal predecessors, (1440), 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) [2023-08-04 00:52:02,183 INFO L175 Difference]: Start difference. First operand has 68 places, 47 transitions, 151 flow. Second operand 5 states and 693 transitions. [2023-08-04 00:52:02,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 78 transitions, 349 flow [2023-08-04 00:52:02,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 78 transitions, 342 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 00:52:02,189 INFO L231 Difference]: Finished difference. Result has 69 places, 47 transitions, 161 flow [2023-08-04 00:52:02,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=161, PETRI_PLACES=69, PETRI_TRANSITIONS=47} [2023-08-04 00:52:02,190 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 10 predicate places. [2023-08-04 00:52:02,190 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 47 transitions, 161 flow [2023-08-04 00:52:02,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 127.6) internal successors, (638), 5 states have internal predecessors, (638), 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) [2023-08-04 00:52:02,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:52:02,190 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:52:02,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 00:52:02,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:52:02,395 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:52:02,396 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:52:02,396 INFO L85 PathProgramCache]: Analyzing trace with hash 572317114, now seen corresponding path program 1 times [2023-08-04 00:52:02,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:52:02,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778014626] [2023-08-04 00:52:02,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:52:02,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:52:02,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:52:02,477 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 00:52:02,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:52:02,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778014626] [2023-08-04 00:52:02,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778014626] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:52:02,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541145800] [2023-08-04 00:52:02,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:52:02,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:52:02,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:52:02,481 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:52:02,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 00:52:02,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:52:02,581 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:52:02,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:52:02,600 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 00:52:02,600 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:52:02,615 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 00:52:02,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541145800] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:52:02,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:52:02,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 00:52:02,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125862853] [2023-08-04 00:52:02,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:52:02,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:52:02,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:52:02,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:52:02,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:52:02,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 240 [2023-08-04 00:52:02,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 47 transitions, 161 flow. Second operand has 5 states, 5 states have (on average 128.4) internal successors, (642), 5 states have internal predecessors, (642), 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) [2023-08-04 00:52:02,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:52:02,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 240 [2023-08-04 00:52:02,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:52:09,971 INFO L124 PetriNetUnfolderBase]: 69178/93703 cut-off events. [2023-08-04 00:52:09,971 INFO L125 PetriNetUnfolderBase]: For 7385/7385 co-relation queries the response was YES. [2023-08-04 00:52:10,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189864 conditions, 93703 events. 69178/93703 cut-off events. For 7385/7385 co-relation queries the response was YES. Maximal size of possible extension queue 3455. Compared 622680 event pairs, 40842 based on Foata normal form. 80/86455 useless extension candidates. Maximal degree in co-relation 90509. Up to 84569 conditions per place. [2023-08-04 00:52:10,589 INFO L140 encePairwiseOnDemand]: 237/240 looper letters, 58 selfloop transitions, 3 changer transitions 0/71 dead transitions. [2023-08-04 00:52:10,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 71 transitions, 327 flow [2023-08-04 00:52:10,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:52:10,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:52:10,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 561 transitions. [2023-08-04 00:52:10,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.584375 [2023-08-04 00:52:10,591 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 561 transitions. [2023-08-04 00:52:10,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 561 transitions. [2023-08-04 00:52:10,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:52:10,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 561 transitions. [2023-08-04 00:52:10,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 140.25) internal successors, (561), 4 states have internal predecessors, (561), 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) [2023-08-04 00:52:10,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 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) [2023-08-04 00:52:10,594 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 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) [2023-08-04 00:52:10,594 INFO L175 Difference]: Start difference. First operand has 69 places, 47 transitions, 161 flow. Second operand 4 states and 561 transitions. [2023-08-04 00:52:10,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 71 transitions, 327 flow [2023-08-04 00:52:10,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 71 transitions, 322 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 00:52:10,599 INFO L231 Difference]: Finished difference. Result has 70 places, 46 transitions, 154 flow [2023-08-04 00:52:10,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=154, PETRI_PLACES=70, PETRI_TRANSITIONS=46} [2023-08-04 00:52:10,599 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 11 predicate places. [2023-08-04 00:52:10,600 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 46 transitions, 154 flow [2023-08-04 00:52:10,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 128.4) internal successors, (642), 5 states have internal predecessors, (642), 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) [2023-08-04 00:52:10,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:52:10,600 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:52:10,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 00:52:10,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:52:10,807 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:52:10,807 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:52:10,807 INFO L85 PathProgramCache]: Analyzing trace with hash -2102366003, now seen corresponding path program 1 times [2023-08-04 00:52:10,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:52:10,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735580872] [2023-08-04 00:52:10,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:52:10,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:52:10,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:52:10,881 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 00:52:10,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:52:10,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735580872] [2023-08-04 00:52:10,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735580872] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:52:10,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:52:10,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 00:52:10,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679837333] [2023-08-04 00:52:10,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:52:10,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 00:52:10,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:52:10,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 00:52:10,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 00:52:10,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 240 [2023-08-04 00:52:10,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 46 transitions, 154 flow. Second operand has 4 states, 4 states have (on average 129.75) internal successors, (519), 4 states have internal predecessors, (519), 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) [2023-08-04 00:52:10,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:52:10,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 240 [2023-08-04 00:52:10,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:52:15,013 INFO L124 PetriNetUnfolderBase]: 39738/55159 cut-off events. [2023-08-04 00:52:15,014 INFO L125 PetriNetUnfolderBase]: For 5829/5829 co-relation queries the response was YES. [2023-08-04 00:52:15,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114360 conditions, 55159 events. 39738/55159 cut-off events. For 5829/5829 co-relation queries the response was YES. Maximal size of possible extension queue 2043. Compared 357998 event pairs, 2738 based on Foata normal form. 6400/56791 useless extension candidates. Maximal degree in co-relation 54357. Up to 38800 conditions per place. [2023-08-04 00:52:15,239 INFO L140 encePairwiseOnDemand]: 238/240 looper letters, 0 selfloop transitions, 0 changer transitions 76/76 dead transitions. [2023-08-04 00:52:15,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 76 transitions, 346 flow [2023-08-04 00:52:15,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:52:15,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:52:15,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 570 transitions. [2023-08-04 00:52:15,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2023-08-04 00:52:15,241 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 570 transitions. [2023-08-04 00:52:15,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 570 transitions. [2023-08-04 00:52:15,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:52:15,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 570 transitions. [2023-08-04 00:52:15,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 142.5) internal successors, (570), 4 states have internal predecessors, (570), 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) [2023-08-04 00:52:15,244 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 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) [2023-08-04 00:52:15,244 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 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) [2023-08-04 00:52:15,244 INFO L175 Difference]: Start difference. First operand has 70 places, 46 transitions, 154 flow. Second operand 4 states and 570 transitions. [2023-08-04 00:52:15,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 76 transitions, 346 flow [2023-08-04 00:52:15,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 76 transitions, 339 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 00:52:15,706 INFO L231 Difference]: Finished difference. Result has 68 places, 0 transitions, 0 flow [2023-08-04 00:52:15,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=68, PETRI_TRANSITIONS=0} [2023-08-04 00:52:15,707 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 9 predicate places. [2023-08-04 00:52:15,707 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 0 transitions, 0 flow [2023-08-04 00:52:15,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 129.75) internal successors, (519), 4 states have internal predecessors, (519), 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) [2023-08-04 00:52:15,707 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 00:52:15,707 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 00:52:15,707 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 00:52:15,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 00:52:15,708 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:52:15,708 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (1/2) [2023-08-04 00:52:15,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 154 transitions, 344 flow [2023-08-04 00:52:15,990 INFO L124 PetriNetUnfolderBase]: 93/1381 cut-off events. [2023-08-04 00:52:15,990 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 00:52:15,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1479 conditions, 1381 events. 93/1381 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 9569 event pairs, 0 based on Foata normal form. 0/1216 useless extension candidates. Maximal degree in co-relation 1004. Up to 54 conditions per place. [2023-08-04 00:52:15,997 INFO L82 GeneralOperation]: Start removeDead. Operand has 162 places, 154 transitions, 344 flow [2023-08-04 00:52:16,000 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 161 places, 153 transitions, 338 flow [2023-08-04 00:52:16,000 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:52:16,000 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 161 places, 153 transitions, 338 flow [2023-08-04 00:52:16,001 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 161 places, 153 transitions, 338 flow [2023-08-04 00:52:16,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 153 transitions, 338 flow [2023-08-04 00:52:16,111 INFO L124 PetriNetUnfolderBase]: 93/1380 cut-off events. [2023-08-04 00:52:16,111 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2023-08-04 00:52:16,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1476 conditions, 1380 events. 93/1380 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 9547 event pairs, 0 based on Foata normal form. 0/1215 useless extension candidates. Maximal degree in co-relation 1001. Up to 54 conditions per place. [2023-08-04 00:52:16,141 INFO L119 LiptonReduction]: Number of co-enabled transitions 6468 [2023-08-04 00:52:20,010 INFO L134 LiptonReduction]: Checked pairs total: 18304 [2023-08-04 00:52:20,010 INFO L136 LiptonReduction]: Total number of compositions: 119 [2023-08-04 00:52:20,011 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 00:52:20,012 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;@60109ee5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:52:20,012 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 00:52:20,015 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:52:20,015 INFO L124 PetriNetUnfolderBase]: 0/14 cut-off events. [2023-08-04 00:52:20,015 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:52:20,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:52:20,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 00:52:20,015 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-04 00:52:20,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:52:20,015 INFO L85 PathProgramCache]: Analyzing trace with hash 873300838, now seen corresponding path program 1 times [2023-08-04 00:52:20,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:52:20,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007462416] [2023-08-04 00:52:20,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:52:20,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:52:20,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:52:20,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:52:20,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:52:20,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007462416] [2023-08-04 00:52:20,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007462416] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:52:20,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:52:20,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:52:20,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585675007] [2023-08-04 00:52:20,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:52:20,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:52:20,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:52:20,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:52:20,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:52:20,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 273 [2023-08-04 00:52:20,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 50 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 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) [2023-08-04 00:52:20,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:52:20,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 273 [2023-08-04 00:52:20,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:53:03,592 INFO L124 PetriNetUnfolderBase]: 363272/479408 cut-off events. [2023-08-04 00:53:03,592 INFO L125 PetriNetUnfolderBase]: For 8780/8780 co-relation queries the response was YES. [2023-08-04 00:53:04,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 945624 conditions, 479408 events. 363272/479408 cut-off events. For 8780/8780 co-relation queries the response was YES. Maximal size of possible extension queue 12513. Compared 3414246 event pairs, 293960 based on Foata normal form. 0/416472 useless extension candidates. Maximal degree in co-relation 203900. Up to 455689 conditions per place. [2023-08-04 00:53:06,455 INFO L140 encePairwiseOnDemand]: 270/273 looper letters, 42 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2023-08-04 00:53:06,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 55 transitions, 230 flow [2023-08-04 00:53:06,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:53:06,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:53:06,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 423 transitions. [2023-08-04 00:53:06,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5164835164835165 [2023-08-04 00:53:06,458 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 423 transitions. [2023-08-04 00:53:06,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 423 transitions. [2023-08-04 00:53:06,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:53:06,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 423 transitions. [2023-08-04 00:53:06,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 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) [2023-08-04 00:53:06,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 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) [2023-08-04 00:53:06,460 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 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) [2023-08-04 00:53:06,461 INFO L175 Difference]: Start difference. First operand has 63 places, 50 transitions, 132 flow. Second operand 3 states and 423 transitions. [2023-08-04 00:53:06,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 55 transitions, 230 flow [2023-08-04 00:53:06,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 55 transitions, 226 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-04 00:53:06,467 INFO L231 Difference]: Finished difference. Result has 66 places, 51 transitions, 140 flow [2023-08-04 00:53:06,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=66, PETRI_TRANSITIONS=51} [2023-08-04 00:53:06,468 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 3 predicate places. [2023-08-04 00:53:06,468 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 51 transitions, 140 flow [2023-08-04 00:53:06,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 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) [2023-08-04 00:53:06,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:53:06,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:53:06,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-04 00:53:06,469 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-04 00:53:06,469 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:53:06,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1081444713, now seen corresponding path program 1 times [2023-08-04 00:53:06,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:53:06,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30000158] [2023-08-04 00:53:06,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:53:06,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:53:06,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:53:06,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:53:06,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:53:06,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30000158] [2023-08-04 00:53:06,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30000158] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:53:06,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113088239] [2023-08-04 00:53:06,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:53:06,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:53:06,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:53:06,509 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:53:06,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 00:53:06,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:53:06,593 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:53:06,594 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:53:06,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:53:06,610 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:53:06,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:53:06,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113088239] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:53:06,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:53:06,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 00:53:06,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291009277] [2023-08-04 00:53:06,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:53:06,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:53:06,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:53:06,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:53:06,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:53:06,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 273 [2023-08-04 00:53:06,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 51 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 127.4) internal successors, (637), 5 states have internal predecessors, (637), 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) [2023-08-04 00:53:06,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:53:06,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 273 [2023-08-04 00:53:06,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:53:38,665 INFO L124 PetriNetUnfolderBase]: 301714/394734 cut-off events. [2023-08-04 00:53:38,665 INFO L125 PetriNetUnfolderBase]: For 6392/6392 co-relation queries the response was YES. [2023-08-04 00:53:39,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 778271 conditions, 394734 events. 301714/394734 cut-off events. For 6392/6392 co-relation queries the response was YES. Maximal size of possible extension queue 10681. Compared 2701406 event pairs, 190828 based on Foata normal form. 4/344386 useless extension candidates. Maximal degree in co-relation 203801. Up to 375577 conditions per place. [2023-08-04 00:53:41,121 INFO L140 encePairwiseOnDemand]: 269/273 looper letters, 47 selfloop transitions, 3 changer transitions 1/62 dead transitions. [2023-08-04 00:53:41,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 62 transitions, 264 flow [2023-08-04 00:53:41,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:53:41,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:53:41,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 552 transitions. [2023-08-04 00:53:41,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5054945054945055 [2023-08-04 00:53:41,123 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 552 transitions. [2023-08-04 00:53:41,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 552 transitions. [2023-08-04 00:53:41,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:53:41,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 552 transitions. [2023-08-04 00:53:41,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 138.0) internal successors, (552), 4 states have internal predecessors, (552), 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) [2023-08-04 00:53:41,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 273.0) internal successors, (1365), 5 states have internal predecessors, (1365), 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) [2023-08-04 00:53:41,126 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 273.0) internal successors, (1365), 5 states have internal predecessors, (1365), 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) [2023-08-04 00:53:41,126 INFO L175 Difference]: Start difference. First operand has 66 places, 51 transitions, 140 flow. Second operand 4 states and 552 transitions. [2023-08-04 00:53:41,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 62 transitions, 264 flow [2023-08-04 00:53:41,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 62 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:53:41,130 INFO L231 Difference]: Finished difference. Result has 70 places, 51 transitions, 152 flow [2023-08-04 00:53:41,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=70, PETRI_TRANSITIONS=51} [2023-08-04 00:53:41,131 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 7 predicate places. [2023-08-04 00:53:41,131 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 51 transitions, 152 flow [2023-08-04 00:53:41,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 127.4) internal successors, (637), 5 states have internal predecessors, (637), 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) [2023-08-04 00:53:41,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:53:41,132 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:53:41,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 00:53:41,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:53:41,337 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting P1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-04 00:53:41,337 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:53:41,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1652232493, now seen corresponding path program 1 times [2023-08-04 00:53:41,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:53:41,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839012557] [2023-08-04 00:53:41,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:53:41,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:53:41,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:53:41,419 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:53:41,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:53:41,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839012557] [2023-08-04 00:53:41,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839012557] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:53:41,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:53:41,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 00:53:41,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001355345] [2023-08-04 00:53:41,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:53:41,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:53:41,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:53:41,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:53:41,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:53:41,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 273 [2023-08-04 00:53:41,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 51 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 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) [2023-08-04 00:53:41,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:53:41,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 273 [2023-08-04 00:53:41,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:54:11,092 INFO L124 PetriNetUnfolderBase]: 259610/340295 cut-off events. [2023-08-04 00:54:11,092 INFO L125 PetriNetUnfolderBase]: For 5808/5808 co-relation queries the response was YES. [2023-08-04 00:54:12,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 670856 conditions, 340295 events. 259610/340295 cut-off events. For 5808/5808 co-relation queries the response was YES. Maximal size of possible extension queue 9291. Compared 2352308 event pairs, 42938 based on Foata normal form. 0/306823 useless extension candidates. Maximal degree in co-relation 319285. Up to 297729 conditions per place. [2023-08-04 00:54:13,106 INFO L140 encePairwiseOnDemand]: 268/273 looper letters, 63 selfloop transitions, 3 changer transitions 0/77 dead transitions. [2023-08-04 00:54:13,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 77 transitions, 349 flow [2023-08-04 00:54:13,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:54:13,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:54:13,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 454 transitions. [2023-08-04 00:54:13,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5543345543345544 [2023-08-04 00:54:13,108 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 454 transitions. [2023-08-04 00:54:13,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 454 transitions. [2023-08-04 00:54:13,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:54:13,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 454 transitions. [2023-08-04 00:54:13,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 151.33333333333334) internal successors, (454), 3 states have internal predecessors, (454), 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) [2023-08-04 00:54:13,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 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) [2023-08-04 00:54:13,111 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 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) [2023-08-04 00:54:13,111 INFO L175 Difference]: Start difference. First operand has 70 places, 51 transitions, 152 flow. Second operand 3 states and 454 transitions. [2023-08-04 00:54:13,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 77 transitions, 349 flow [2023-08-04 00:54:13,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 77 transitions, 342 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 00:54:13,114 INFO L231 Difference]: Finished difference. Result has 70 places, 53 transitions, 166 flow [2023-08-04 00:54:13,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=70, PETRI_TRANSITIONS=53} [2023-08-04 00:54:13,115 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 7 predicate places. [2023-08-04 00:54:13,115 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 53 transitions, 166 flow [2023-08-04 00:54:13,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 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) [2023-08-04 00:54:13,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:54:13,115 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:54:13,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-04 00:54:13,116 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-04 00:54:13,116 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:54:13,116 INFO L85 PathProgramCache]: Analyzing trace with hash -320069432, now seen corresponding path program 1 times [2023-08-04 00:54:13,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:54:13,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173620529] [2023-08-04 00:54:13,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:54:13,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:54:13,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:54:13,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:54:13,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:54:13,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173620529] [2023-08-04 00:54:13,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173620529] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:54:13,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:54:13,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 00:54:13,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250843426] [2023-08-04 00:54:13,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:54:13,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:54:13,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:54:13,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:54:13,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:54:13,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 273 [2023-08-04 00:54:13,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 53 transitions, 166 flow. Second operand has 3 states, 3 states have (on average 129.33333333333334) internal successors, (388), 3 states have internal predecessors, (388), 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) [2023-08-04 00:54:13,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:54:13,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 273 [2023-08-04 00:54:13,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:54:41,683 INFO L124 PetriNetUnfolderBase]: 253322/332119 cut-off events. [2023-08-04 00:54:41,683 INFO L125 PetriNetUnfolderBase]: For 26377/26377 co-relation queries the response was YES. [2023-08-04 00:54:42,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 697864 conditions, 332119 events. 253322/332119 cut-off events. For 26377/26377 co-relation queries the response was YES. Maximal size of possible extension queue 9454. Compared 2275086 event pairs, 212698 based on Foata normal form. 0/298151 useless extension candidates. Maximal degree in co-relation 333373. Up to 315145 conditions per place. [2023-08-04 00:54:43,719 INFO L140 encePairwiseOnDemand]: 270/273 looper letters, 51 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2023-08-04 00:54:43,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 64 transitions, 297 flow [2023-08-04 00:54:43,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:54:43,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:54:43,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 429 transitions. [2023-08-04 00:54:43,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2023-08-04 00:54:43,720 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 429 transitions. [2023-08-04 00:54:43,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 429 transitions. [2023-08-04 00:54:43,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:54:43,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 429 transitions. [2023-08-04 00:54:43,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 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) [2023-08-04 00:54:43,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 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) [2023-08-04 00:54:43,722 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 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) [2023-08-04 00:54:43,723 INFO L175 Difference]: Start difference. First operand has 70 places, 53 transitions, 166 flow. Second operand 3 states and 429 transitions. [2023-08-04 00:54:43,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 64 transitions, 297 flow [2023-08-04 00:54:43,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 64 transitions, 293 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:54:43,725 INFO L231 Difference]: Finished difference. Result has 72 places, 54 transitions, 175 flow [2023-08-04 00:54:43,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=175, PETRI_PLACES=72, PETRI_TRANSITIONS=54} [2023-08-04 00:54:43,726 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 9 predicate places. [2023-08-04 00:54:43,726 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 54 transitions, 175 flow [2023-08-04 00:54:43,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.33333333333334) internal successors, (388), 3 states have internal predecessors, (388), 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) [2023-08-04 00:54:43,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:54:43,726 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:54:43,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-04 00:54:43,727 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting P1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-04 00:54:43,727 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:54:43,727 INFO L85 PathProgramCache]: Analyzing trace with hash 2037919114, now seen corresponding path program 1 times [2023-08-04 00:54:43,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:54:43,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990072028] [2023-08-04 00:54:43,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:54:43,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:54:43,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 00:54:43,741 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 00:54:43,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 00:54:43,759 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 00:54:43,759 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 00:54:43,759 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location P1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-04 00:54:43,759 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-04 00:54:43,759 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location P1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-08-04 00:54:43,760 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location P1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-04 00:54:43,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-04 00:54:43,760 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-04 00:54:43,760 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN (2/2) [2023-08-04 00:54:43,763 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-04 00:54:43,763 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-04 00:54:43,817 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.08 12:54:43 BasicIcfg [2023-08-04 00:54:43,817 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-04 00:54:43,818 INFO L158 Benchmark]: Toolchain (without parser) took 225265.43ms. Allocated memory was 352.3MB in the beginning and 16.0GB in the end (delta: 15.6GB). Free memory was 307.3MB in the beginning and 10.9GB in the end (delta: -10.6GB). Peak memory consumption was 5.1GB. Max. memory is 16.0GB. [2023-08-04 00:54:43,818 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 352.3MB. Free memory is still 305.7MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 00:54:43,818 INFO L158 Benchmark]: CACSL2BoogieTranslator took 507.11ms. Allocated memory is still 352.3MB. Free memory was 306.9MB in the beginning and 283.3MB in the end (delta: 23.6MB). Peak memory consumption was 25.2MB. Max. memory is 16.0GB. [2023-08-04 00:54:43,818 INFO L158 Benchmark]: Boogie Procedure Inliner took 55.33ms. Allocated memory is still 352.3MB. Free memory was 283.3MB in the beginning and 280.4MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 00:54:43,818 INFO L158 Benchmark]: Boogie Preprocessor took 29.62ms. Allocated memory is still 352.3MB. Free memory was 280.4MB in the beginning and 278.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 00:54:43,819 INFO L158 Benchmark]: RCFGBuilder took 613.10ms. Allocated memory was 352.3MB in the beginning and 520.1MB in the end (delta: 167.8MB). Free memory was 278.3MB in the beginning and 468.2MB in the end (delta: -189.9MB). Peak memory consumption was 28.5MB. Max. memory is 16.0GB. [2023-08-04 00:54:43,819 INFO L158 Benchmark]: TraceAbstraction took 224052.25ms. Allocated memory was 520.1MB in the beginning and 16.0GB in the end (delta: 15.5GB). Free memory was 467.4MB in the beginning and 10.9GB in the end (delta: -10.4GB). Peak memory consumption was 5.1GB. Max. memory is 16.0GB. [2023-08-04 00:54:43,820 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 352.3MB. Free memory is still 305.7MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 507.11ms. Allocated memory is still 352.3MB. Free memory was 306.9MB in the beginning and 283.3MB in the end (delta: 23.6MB). Peak memory consumption was 25.2MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 55.33ms. Allocated memory is still 352.3MB. Free memory was 283.3MB in the beginning and 280.4MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 29.62ms. Allocated memory is still 352.3MB. Free memory was 280.4MB in the beginning and 278.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 613.10ms. Allocated memory was 352.3MB in the beginning and 520.1MB in the end (delta: 167.8MB). Free memory was 278.3MB in the beginning and 468.2MB in the end (delta: -189.9MB). Peak memory consumption was 28.5MB. Max. memory is 16.0GB. * TraceAbstraction took 224052.25ms. Allocated memory was 520.1MB in the beginning and 16.0GB in the end (delta: 15.5GB). Free memory was 467.4MB in the beginning and 10.9GB in the end (delta: -10.4GB). Peak memory consumption was 5.1GB. 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: 2.9s, 105 PlacesBefore, 34 PlacesAfterwards, 100 TransitionsBefore, 27 TransitionsAfterwards, 1422 CoEnabledTransitionPairs, 6 FixpointIterations, 36 TrivialSequentialCompositions, 32 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 2 ChoiceCompositions, 79 TotalNumberOfCompositions, 3753 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1682, independent: 1554, independent conditional: 0, independent unconditional: 1554, dependent: 128, dependent conditional: 0, dependent unconditional: 128, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 703, independent: 686, independent conditional: 0, independent unconditional: 686, dependent: 17, dependent conditional: 0, dependent unconditional: 17, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1682, independent: 868, independent conditional: 0, independent unconditional: 868, dependent: 111, dependent conditional: 0, dependent unconditional: 111, unknown: 703, unknown conditional: 0, unknown unconditional: 703] , Statistics on independence cache: Total cache size (in pairs): 88, Positive cache size: 79, Positive conditional cache size: 0, Positive unconditional cache size: 79, Negative cache size: 9, Negative conditional cache size: 0, Negative unconditional cache size: 9, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.9s, 136 PlacesBefore, 59 PlacesAfterwards, 125 TransitionsBefore, 46 TransitionsAfterwards, 3944 CoEnabledTransitionPairs, 6 FixpointIterations, 36 TrivialSequentialCompositions, 39 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 2 ChoiceCompositions, 86 TotalNumberOfCompositions, 12620 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4471, independent: 4221, independent conditional: 0, independent unconditional: 4221, dependent: 250, dependent conditional: 0, dependent unconditional: 250, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1845, independent: 1806, independent conditional: 0, independent unconditional: 1806, dependent: 39, dependent conditional: 0, dependent unconditional: 39, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 4471, independent: 2415, independent conditional: 0, independent unconditional: 2415, dependent: 211, dependent conditional: 0, dependent unconditional: 211, unknown: 1845, unknown conditional: 0, unknown unconditional: 1845] , Statistics on independence cache: Total cache size (in pairs): 303, Positive cache size: 282, Positive conditional cache size: 0, Positive unconditional cache size: 282, Negative cache size: 21, Negative conditional cache size: 0, Negative unconditional cache size: 21, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.0s, 161 PlacesBefore, 63 PlacesAfterwards, 153 TransitionsBefore, 50 TransitionsAfterwards, 6468 CoEnabledTransitionPairs, 6 FixpointIterations, 36 TrivialSequentialCompositions, 63 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 15 ConcurrentYvCompositions, 5 ChoiceCompositions, 119 TotalNumberOfCompositions, 18304 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 6815, independent: 6532, independent conditional: 0, independent unconditional: 6532, dependent: 283, dependent conditional: 0, dependent unconditional: 283, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3245, independent: 3171, independent conditional: 0, independent unconditional: 3171, dependent: 74, dependent conditional: 0, dependent unconditional: 74, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 6815, independent: 3361, independent conditional: 0, independent unconditional: 3361, dependent: 209, dependent conditional: 0, dependent unconditional: 209, unknown: 3245, unknown conditional: 0, unknown unconditional: 3245] , Statistics on independence cache: Total cache size (in pairs): 341, Positive cache size: 315, Positive conditional cache size: 0, Positive unconditional cache size: 315, Negative cache size: 26, Negative conditional cache size: 0, Negative unconditional cache size: 26, 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: [L709] 0 int __unbuffered_cnt = 0; [L711] 0 int __unbuffered_p2_EAX = 0; [L713] 0 int __unbuffered_p2_EBX = 0; [L714] 0 _Bool main$tmp_guard0; [L715] 0 _Bool main$tmp_guard1; [L717] 0 int x = 0; [L718] 0 _Bool x$flush_delayed; [L719] 0 int x$mem_tmp; [L720] 0 _Bool x$r_buff0_thd0; [L721] 0 _Bool x$r_buff0_thd1; [L722] 0 _Bool x$r_buff0_thd2; [L723] 0 _Bool x$r_buff0_thd3; [L724] 0 _Bool x$r_buff1_thd0; [L725] 0 _Bool x$r_buff1_thd1; [L726] 0 _Bool x$r_buff1_thd2; [L727] 0 _Bool x$r_buff1_thd3; [L728] 0 _Bool x$read_delayed; [L729] 0 int *x$read_delayed_var; [L730] 0 int x$w_buff0; [L731] 0 _Bool x$w_buff0_used; [L732] 0 int x$w_buff1; [L733] 0 _Bool x$w_buff1_used; [L735] 0 int y = 0; [L737] 0 int z = 0; [L738] 0 _Bool weak$$choice0; [L739] 0 _Bool weak$$choice2; [L820] 0 pthread_t t2284[2]; [L821] 0 int asdf=0; VAL [__unbuffered_cnt=0, __unbuffered_p2_EAX=0, __unbuffered_p2_EBX=0, asdf=0, main$tmp_guard0=0, main$tmp_guard1=0, t2284={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_buff0_thd3=0, x$r_buff1_thd0=0, x$r_buff1_thd1=0, x$r_buff1_thd2=0, x$r_buff1_thd3=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, z=0] [L821] COND TRUE 0 asdf<2 [L821] FCALL, FORK 0 pthread_create(&t2284[asdf], ((void *)0), P0, ((void *)0)) VAL [__unbuffered_cnt=0, __unbuffered_p2_EAX=0, __unbuffered_p2_EBX=0, arg={0:0}, asdf=0, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t2284[asdf], ((void *)0), P0, ((void *)0))=-3, t2284={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_buff0_thd3=0, x$r_buff1_thd0=0, x$r_buff1_thd1=0, x$r_buff1_thd2=0, x$r_buff1_thd3=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, z=0] [L821] 0 asdf++ VAL [__unbuffered_cnt=0, __unbuffered_p2_EAX=0, __unbuffered_p2_EBX=0, arg={0:0}, asdf=1, main$tmp_guard0=0, main$tmp_guard1=0, t2284={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_buff0_thd3=0, x$r_buff1_thd0=0, x$r_buff1_thd1=0, x$r_buff1_thd2=0, x$r_buff1_thd3=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, z=0] [L821] COND TRUE 0 asdf<2 [L821] FCALL, FORK 0 pthread_create(&t2284[asdf], ((void *)0), P0, ((void *)0)) VAL [__unbuffered_cnt=0, __unbuffered_p2_EAX=0, __unbuffered_p2_EBX=0, arg={0:0}, asdf=1, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t2284[asdf], ((void *)0), P0, ((void *)0))=-2, t2284={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_buff0_thd3=0, x$r_buff1_thd0=0, x$r_buff1_thd1=0, x$r_buff1_thd2=0, x$r_buff1_thd3=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, z=0] [L821] 0 asdf++ VAL [__unbuffered_cnt=0, __unbuffered_p2_EAX=0, __unbuffered_p2_EBX=0, arg={0:0}, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, t2284={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_buff0_thd3=0, x$r_buff1_thd0=0, x$r_buff1_thd1=0, x$r_buff1_thd2=0, x$r_buff1_thd3=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, z=0] [L821] COND FALSE 0 !(asdf<2) [L822] 0 pthread_t t2285[2]; [L823] 0 int asdf=0; VAL [__unbuffered_cnt=0, __unbuffered_p2_EAX=0, __unbuffered_p2_EBX=0, arg={0:0}, asdf=0, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, t2284={5:0}, t2285={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_buff0_thd3=0, x$r_buff1_thd0=0, x$r_buff1_thd1=0, x$r_buff1_thd2=0, x$r_buff1_thd3=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, z=0] [L823] COND TRUE 0 asdf<2 [L823] FCALL, FORK 0 pthread_create(&t2285[asdf], ((void *)0), P1, ((void *)0)) VAL [__unbuffered_cnt=0, __unbuffered_p2_EAX=0, __unbuffered_p2_EBX=0, arg={0:0}, asdf=0, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t2285[asdf], ((void *)0), P1, ((void *)0))=-1, t2284={5:0}, t2285={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_buff0_thd3=0, x$r_buff1_thd0=0, x$r_buff1_thd1=0, x$r_buff1_thd2=0, x$r_buff1_thd3=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, z=0] [L763] 3 x$w_buff1 = x$w_buff0 [L764] 3 x$w_buff0 = 2 [L765] 3 x$w_buff1_used = x$w_buff0_used [L766] 3 x$w_buff0_used = (_Bool)1 [L767] CALL 3 __VERIFIER_assert(!(x$w_buff1_used && x$w_buff0_used)) [L18] COND FALSE 3 !(!expression) [L767] RET 3 __VERIFIER_assert(!(x$w_buff1_used && x$w_buff0_used)) [L768] 3 x$r_buff1_thd0 = x$r_buff0_thd0 [L769] 3 x$r_buff1_thd1 = x$r_buff0_thd1 [L770] 3 x$r_buff1_thd2 = x$r_buff0_thd2 [L771] 3 x$r_buff1_thd3 = x$r_buff0_thd3 [L772] 3 x$r_buff0_thd2 = (_Bool)1 VAL [__unbuffered_cnt=0, __unbuffered_p2_EAX=0, __unbuffered_p2_EBX=0, arg={0:0}, arg={0:0}, arg={0:0}, main$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_buff0_thd3=0, x$r_buff1_thd0=0, x$r_buff1_thd1=0, x$r_buff1_thd2=0, x$r_buff1_thd3=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, z=0] [L823] 0 asdf++ VAL [__unbuffered_cnt=0, __unbuffered_p2_EAX=0, __unbuffered_p2_EBX=0, arg={0:0}, asdf=1, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, t2284={5:0}, t2285={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_buff0_thd3=0, x$r_buff1_thd0=0, x$r_buff1_thd1=0, x$r_buff1_thd2=0, x$r_buff1_thd3=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, z=0] [L823] COND TRUE 0 asdf<2 [L823] FCALL, FORK 0 pthread_create(&t2285[asdf], ((void *)0), P1, ((void *)0)) VAL [__unbuffered_cnt=0, __unbuffered_p2_EAX=0, __unbuffered_p2_EBX=0, arg={0:0}, asdf=1, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t2285[asdf], ((void *)0), P1, ((void *)0))=0, t2284={5:0}, t2285={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_buff0_thd3=0, x$r_buff1_thd0=0, x$r_buff1_thd1=0, x$r_buff1_thd2=0, x$r_buff1_thd3=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, z=0] [L763] 4 x$w_buff1 = x$w_buff0 [L764] 4 x$w_buff0 = 2 [L765] 4 x$w_buff1_used = x$w_buff0_used [L766] 4 x$w_buff0_used = (_Bool)1 [L767] CALL 4 __VERIFIER_assert(!(x$w_buff1_used && x$w_buff0_used)) [L18] COND TRUE 4 !expression [L18] 4 reach_error() VAL [\old(expression)=1, __unbuffered_cnt=0, __unbuffered_p2_EAX=0, __unbuffered_p2_EBX=0, arg={0:0}, expression=1, 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_buff0_thd3=0, x$r_buff1_thd0=0, x$r_buff1_thd1=0, x$r_buff1_thd2=0, x$r_buff1_thd3=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, z=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. - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 7 procedures, 150 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: 3.8s, OverallIterations: 2, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 17 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, 48 IncrementalHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3 mSolverCounterUnsat, 1 mSDtfsCounter, 48 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=77occurred 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, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 7 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 1/1 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 for thread instance sufficiency with 2 thread instances CFG has 10 procedures, 175 locations, 7 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: 72.0s, OverallIterations: 7, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 66.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 336 SdHoareTripleChecker+Valid, 0.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 271 mSDsluCounter, 15 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 22 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 744 IncrementalHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 22 mSolverCounterUnsat, 15 mSDtfsCounter, 744 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 139 GetRequests, 115 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=161occurred in iteration=5, InterpolantAutomatonStates: 28, 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, 0.6s InterpolantComputationTime, 202 NumberOfCodeBlocks, 202 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 226 ConstructedInterpolants, 0 QuantifiedInterpolants, 384 SizeOfPredicates, 0 NumberOfNonLiveVariables, 884 ConjunctsInSsa, 16 ConjunctsInUnsatCore, 14 InterpolantComputations, 5 PerfectInterpolantSequences, 124/141 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 1 thread instances CFG has 10 procedures, 175 locations, 7 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: 148.0s, OverallIterations: 5, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 143.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 97 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 62 mSDsluCounter, 9 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 18 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 379 IncrementalHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 18 mSolverCounterUnsat, 9 mSDtfsCounter, 379 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=175occurred in iteration=4, InterpolantAutomatonStates: 13, 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, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 68 NumberOfCodeBlocks, 68 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 53 ConstructedInterpolants, 0 QuantifiedInterpolants, 111 SizeOfPredicates, 0 NumberOfNonLiveVariables, 154 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 6 InterpolantComputations, 3 PerfectInterpolantSequences, 12/15 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! [2023-08-04 00:54:43,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...