/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 PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe028_power_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 07:22:03,159 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 07:22:03,201 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 07:22:03,203 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 07:22:03,204 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 07:22:03,204 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 07:22:03,204 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 07:22:03,218 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 07:22:03,218 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 07:22:03,218 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 07:22:03,219 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 07:22:03,219 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 07:22:03,219 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 07:22:03,219 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 07:22:03,220 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 07:22:03,220 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 07:22:03,220 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 07:22:03,220 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 07:22:03,221 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 07:22:03,221 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 07:22:03,221 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 07:22:03,221 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 07:22:03,222 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 07:22:03,222 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 07:22:03,222 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 07:22:03,222 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 07:22:03,222 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 07:22:03,223 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 07:22:03,223 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 07:22:03,223 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 07:22:03,223 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:22:03,223 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 07:22:03,224 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 07:22:03,224 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 07:22:03,224 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 07:22:03,224 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 07:22:03,224 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 07:22:03,224 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 07:22:03,224 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 07:22:03,225 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 07:22:03,225 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 07:22:03,235 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 07:22:03,394 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 07:22:03,417 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 07:22:03,422 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 07:22:03,423 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 07:22:03,423 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 07:22:03,424 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe028_power_bound2.i [2023-08-04 07:22:04,453 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 07:22:04,651 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 07:22:04,652 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe028_power_bound2.i [2023-08-04 07:22:04,665 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ac112ed6/df8e27a52bb14002907adaa746c85f59/FLAG14f8df2f0 [2023-08-04 07:22:04,676 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ac112ed6/df8e27a52bb14002907adaa746c85f59 [2023-08-04 07:22:04,678 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 07:22:04,679 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 07:22:04,680 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 07:22:04,680 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 07:22:04,687 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 07:22:04,688 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:22:04" (1/1) ... [2023-08-04 07:22:04,689 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5df32a08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:22:04, skipping insertion in model container [2023-08-04 07:22:04,689 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:22:04" (1/1) ... [2023-08-04 07:22:04,728 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 07:22:04,854 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_safe028_power_bound2.i[990,1003] [2023-08-04 07:22:05,029 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:22:05,037 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 07:22:05,050 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_safe028_power_bound2.i[990,1003] [2023-08-04 07:22:05,057 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-04 07:22:05,058 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-04 07:22:05,109 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:22:05,140 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 07:22:05,140 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 07:22:05,145 INFO L206 MainTranslator]: Completed translation [2023-08-04 07:22:05,145 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:22:05 WrapperNode [2023-08-04 07:22:05,145 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 07:22:05,146 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 07:22:05,146 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 07:22:05,146 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 07:22:05,152 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:22:05" (1/1) ... [2023-08-04 07:22:05,164 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:22:05" (1/1) ... [2023-08-04 07:22:05,183 INFO L138 Inliner]: procedures = 176, calls = 77, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 202 [2023-08-04 07:22:05,184 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 07:22:05,184 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 07:22:05,184 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 07:22:05,184 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 07:22:05,190 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:22:05" (1/1) ... [2023-08-04 07:22:05,190 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:22:05" (1/1) ... [2023-08-04 07:22:05,194 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:22:05" (1/1) ... [2023-08-04 07:22:05,194 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:22:05" (1/1) ... [2023-08-04 07:22:05,201 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:22:05" (1/1) ... [2023-08-04 07:22:05,203 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:22:05" (1/1) ... [2023-08-04 07:22:05,210 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:22:05" (1/1) ... [2023-08-04 07:22:05,211 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:22:05" (1/1) ... [2023-08-04 07:22:05,226 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 07:22:05,227 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 07:22:05,227 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 07:22:05,227 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 07:22:05,228 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:22:05" (1/1) ... [2023-08-04 07:22:05,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:22:05,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:22:05,251 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 07:22:05,261 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 07:22:05,280 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 07:22:05,280 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 07:22:05,280 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 07:22:05,280 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 07:22:05,281 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 07:22:05,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 07:22:05,282 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 07:22:05,282 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 07:22:05,282 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 07:22:05,282 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 07:22:05,282 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-04 07:22:05,282 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-04 07:22:05,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 07:22:05,283 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 07:22:05,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 07:22:05,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 07:22:05,284 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 07:22:05,413 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 07:22:05,415 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 07:22:05,792 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 07:22:06,026 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 07:22:06,027 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-04 07:22:06,029 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:22:06 BoogieIcfgContainer [2023-08-04 07:22:06,029 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 07:22:06,031 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 07:22:06,032 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 07:22:06,034 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 07:22:06,034 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 07:22:04" (1/3) ... [2023-08-04 07:22:06,036 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f906e95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:22:06, skipping insertion in model container [2023-08-04 07:22:06,036 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:22:05" (2/3) ... [2023-08-04 07:22:06,036 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f906e95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:22:06, skipping insertion in model container [2023-08-04 07:22:06,036 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:22:06" (3/3) ... [2023-08-04 07:22:06,037 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe028_power_bound2.i [2023-08-04 07:22:06,043 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 07:22:06,066 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 07:22:06,067 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-04 07:22:06,067 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 07:22:06,122 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 07:22:06,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 146 transitions, 307 flow [2023-08-04 07:22:06,263 INFO L124 PetriNetUnfolderBase]: 30/465 cut-off events. [2023-08-04 07:22:06,264 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:22:06,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 490 conditions, 465 events. 30/465 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1937 event pairs, 0 based on Foata normal form. 0/411 useless extension candidates. Maximal degree in co-relation 286. Up to 16 conditions per place. [2023-08-04 07:22:06,269 INFO L82 GeneralOperation]: Start removeDead. Operand has 148 places, 146 transitions, 307 flow [2023-08-04 07:22:06,275 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 147 places, 145 transitions, 303 flow [2023-08-04 07:22:06,277 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:22:06,289 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 147 places, 145 transitions, 303 flow [2023-08-04 07:22:06,292 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 147 places, 145 transitions, 303 flow [2023-08-04 07:22:06,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 147 places, 145 transitions, 303 flow [2023-08-04 07:22:06,331 INFO L124 PetriNetUnfolderBase]: 30/464 cut-off events. [2023-08-04 07:22:06,332 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:22:06,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 488 conditions, 464 events. 30/464 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1931 event pairs, 0 based on Foata normal form. 0/410 useless extension candidates. Maximal degree in co-relation 284. Up to 16 conditions per place. [2023-08-04 07:22:06,338 INFO L119 LiptonReduction]: Number of co-enabled transitions 2384 [2023-08-04 07:22:12,288 INFO L134 LiptonReduction]: Checked pairs total: 5899 [2023-08-04 07:22:12,289 INFO L136 LiptonReduction]: Total number of compositions: 128 [2023-08-04 07:22:12,297 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:22:12,301 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;@349b03ae, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:22:12,302 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 07:22:12,305 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:22:12,305 INFO L124 PetriNetUnfolderBase]: 1/16 cut-off events. [2023-08-04 07:22:12,305 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:22:12,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:22:12,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 07:22:12,306 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P1Err0ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:22:12,309 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:22:12,309 INFO L85 PathProgramCache]: Analyzing trace with hash 906493359, now seen corresponding path program 1 times [2023-08-04 07:22:12,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:22:12,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934805261] [2023-08-04 07:22:12,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:22:12,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:22:12,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:22:12,545 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 07:22:12,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:22:12,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934805261] [2023-08-04 07:22:12,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934805261] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:22:12,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:22:12,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:22:12,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553731405] [2023-08-04 07:22:12,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:22:12,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:22:12,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:22:12,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:22:12,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:22:12,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 274 [2023-08-04 07:22:12,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 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 07:22:12,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:22:12,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 274 [2023-08-04 07:22:12,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:22:13,111 INFO L124 PetriNetUnfolderBase]: 2161/3391 cut-off events. [2023-08-04 07:22:13,111 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 07:22:13,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6825 conditions, 3391 events. 2161/3391 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 17826 event pairs, 1312 based on Foata normal form. 120/2911 useless extension candidates. Maximal degree in co-relation 6812. Up to 3294 conditions per place. [2023-08-04 07:22:13,126 INFO L140 encePairwiseOnDemand]: 270/274 looper letters, 29 selfloop transitions, 2 changer transitions 1/35 dead transitions. [2023-08-04 07:22:13,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 35 transitions, 147 flow [2023-08-04 07:22:13,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:22:13,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:22:13,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 409 transitions. [2023-08-04 07:22:13,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4975669099756691 [2023-08-04 07:22:13,141 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 409 transitions. [2023-08-04 07:22:13,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 409 transitions. [2023-08-04 07:22:13,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:22:13,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 409 transitions. [2023-08-04 07:22:13,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 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 07:22:13,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 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 07:22:13,153 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 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 07:22:13,154 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 77 flow. Second operand 3 states and 409 transitions. [2023-08-04 07:22:13,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 35 transitions, 147 flow [2023-08-04 07:22:13,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 35 transitions, 147 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 07:22:13,158 INFO L231 Difference]: Finished difference. Result has 41 places, 31 transitions, 83 flow [2023-08-04 07:22:13,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=83, PETRI_PLACES=41, PETRI_TRANSITIONS=31} [2023-08-04 07:22:13,161 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 3 predicate places. [2023-08-04 07:22:13,162 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 31 transitions, 83 flow [2023-08-04 07:22:13,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 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 07:22:13,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:22:13,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:22:13,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 07:22:13,163 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P1Err0ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:22:13,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:22:13,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1957004988, now seen corresponding path program 1 times [2023-08-04 07:22:13,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:22:13,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940703016] [2023-08-04 07:22:13,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:22:13,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:22:13,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:22:13,266 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 07:22:13,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:22:13,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940703016] [2023-08-04 07:22:13,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940703016] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:22:13,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827287172] [2023-08-04 07:22:13,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:22:13,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:22:13,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:22:13,275 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 07:22:13,276 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 07:22:13,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:22:13,430 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:22:13,433 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:22:13,464 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 07:22:13,465 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:22:13,481 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 07:22:13,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827287172] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:22:13,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:22:13,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 07:22:13,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281392664] [2023-08-04 07:22:13,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:22:13,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:22:13,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:22:13,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:22:13,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:22:13,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 274 [2023-08-04 07:22:13,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 83 flow. Second operand has 5 states, 5 states have (on average 126.4) internal successors, (632), 5 states have internal predecessors, (632), 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 07:22:13,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:22:13,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 274 [2023-08-04 07:22:13,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:22:13,528 INFO L124 PetriNetUnfolderBase]: 6/20 cut-off events. [2023-08-04 07:22:13,528 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 07:22:13,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 20 events. 6/20 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 28 event pairs, 0 based on Foata normal form. 4/24 useless extension candidates. Maximal degree in co-relation 51. Up to 14 conditions per place. [2023-08-04 07:22:13,531 INFO L140 encePairwiseOnDemand]: 271/274 looper letters, 0 selfloop transitions, 0 changer transitions 11/11 dead transitions. [2023-08-04 07:22:13,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 18 places, 11 transitions, 53 flow [2023-08-04 07:22:13,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:22:13,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:22:13,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 508 transitions. [2023-08-04 07:22:13,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4635036496350365 [2023-08-04 07:22:13,536 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 508 transitions. [2023-08-04 07:22:13,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 508 transitions. [2023-08-04 07:22:13,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:22:13,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 508 transitions. [2023-08-04 07:22:13,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 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 07:22:13,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 274.0) internal successors, (1370), 5 states have internal predecessors, (1370), 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 07:22:13,539 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 274.0) internal successors, (1370), 5 states have internal predecessors, (1370), 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 07:22:13,539 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 83 flow. Second operand 4 states and 508 transitions. [2023-08-04 07:22:13,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 18 places, 11 transitions, 53 flow [2023-08-04 07:22:13,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 15 places, 11 transitions, 47 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 07:22:13,540 INFO L231 Difference]: Finished difference. Result has 15 places, 0 transitions, 0 flow [2023-08-04 07:22:13,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=17, PETRI_DIFFERENCE_MINUEND_PLACES=12, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=15, PETRI_TRANSITIONS=0} [2023-08-04 07:22:13,541 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -23 predicate places. [2023-08-04 07:22:13,541 INFO L495 AbstractCegarLoop]: Abstraction has has 15 places, 0 transitions, 0 flow [2023-08-04 07:22:13,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 126.4) internal successors, (632), 5 states have internal predecessors, (632), 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 07:22:13,544 INFO L805 garLoopResultBuilder]: Registering result SAFE for location P1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-04 07:22:13,544 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-04 07:22:13,544 INFO L805 garLoopResultBuilder]: Registering result SAFE for location P1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-04 07:22:13,551 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 07:22:13,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:22:13,748 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 07:22:13,750 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE (1/2) [2023-08-04 07:22:13,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 146 transitions, 307 flow [2023-08-04 07:22:13,783 INFO L124 PetriNetUnfolderBase]: 30/465 cut-off events. [2023-08-04 07:22:13,783 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:22:13,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 490 conditions, 465 events. 30/465 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1937 event pairs, 0 based on Foata normal form. 0/411 useless extension candidates. Maximal degree in co-relation 286. Up to 16 conditions per place. [2023-08-04 07:22:13,783 INFO L82 GeneralOperation]: Start removeDead. Operand has 148 places, 146 transitions, 307 flow [2023-08-04 07:22:13,784 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 122 places, 117 transitions, 249 flow [2023-08-04 07:22:13,784 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:22:13,784 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 122 places, 117 transitions, 249 flow [2023-08-04 07:22:13,785 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 122 places, 117 transitions, 249 flow [2023-08-04 07:22:13,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 117 transitions, 249 flow [2023-08-04 07:22:13,799 INFO L124 PetriNetUnfolderBase]: 6/233 cut-off events. [2023-08-04 07:22:13,799 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:22:13,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 233 events. 6/233 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 627 event pairs, 0 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 170. Up to 8 conditions per place. [2023-08-04 07:22:13,801 INFO L119 LiptonReduction]: Number of co-enabled transitions 1236 [2023-08-04 07:22:18,904 INFO L134 LiptonReduction]: Checked pairs total: 2962 [2023-08-04 07:22:18,904 INFO L136 LiptonReduction]: Total number of compositions: 98 [2023-08-04 07:22:18,905 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 07:22:18,906 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;@349b03ae, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:22:18,906 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 07:22:18,909 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:22:18,909 INFO L124 PetriNetUnfolderBase]: 0/22 cut-off events. [2023-08-04 07:22:18,909 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:22:18,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:22:18,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 07:22:18,910 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 07:22:18,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:22:18,910 INFO L85 PathProgramCache]: Analyzing trace with hash 944638931, now seen corresponding path program 1 times [2023-08-04 07:22:18,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:22:18,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848416289] [2023-08-04 07:22:18,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:22:18,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:22:18,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:22:18,941 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 07:22:18,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:22:18,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848416289] [2023-08-04 07:22:18,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848416289] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:22:18,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:22:18,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:22:18,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842091258] [2023-08-04 07:22:18,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:22:18,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:22:18,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:22:18,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:22:18,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:22:18,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 244 [2023-08-04 07:22:18,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 25 transitions, 65 flow. Second operand has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 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 07:22:18,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:22:18,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 244 [2023-08-04 07:22:18,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:22:19,085 INFO L124 PetriNetUnfolderBase]: 467/845 cut-off events. [2023-08-04 07:22:19,085 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 07:22:19,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1737 conditions, 845 events. 467/845 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3994 event pairs, 248 based on Foata normal form. 0/749 useless extension candidates. Maximal degree in co-relation 1716. Up to 760 conditions per place. [2023-08-04 07:22:19,088 INFO L140 encePairwiseOnDemand]: 241/244 looper letters, 23 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2023-08-04 07:22:19,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 29 transitions, 123 flow [2023-08-04 07:22:19,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:22:19,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:22:19,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 401 transitions. [2023-08-04 07:22:19,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5478142076502732 [2023-08-04 07:22:19,089 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 401 transitions. [2023-08-04 07:22:19,089 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 401 transitions. [2023-08-04 07:22:19,090 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:22:19,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 401 transitions. [2023-08-04 07:22:19,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 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 07:22:19,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 244.0) internal successors, (976), 4 states have internal predecessors, (976), 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 07:22:19,092 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 244.0) internal successors, (976), 4 states have internal predecessors, (976), 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 07:22:19,092 INFO L175 Difference]: Start difference. First operand has 32 places, 25 transitions, 65 flow. Second operand 3 states and 401 transitions. [2023-08-04 07:22:19,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 29 transitions, 123 flow [2023-08-04 07:22:19,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 29 transitions, 123 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 07:22:19,093 INFO L231 Difference]: Finished difference. Result has 35 places, 25 transitions, 73 flow [2023-08-04 07:22:19,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=244, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=35, PETRI_TRANSITIONS=25} [2023-08-04 07:22:19,095 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 3 predicate places. [2023-08-04 07:22:19,095 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 25 transitions, 73 flow [2023-08-04 07:22:19,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 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 07:22:19,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:22:19,095 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 07:22:19,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 07:22:19,095 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 07:22:19,095 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:22:19,096 INFO L85 PathProgramCache]: Analyzing trace with hash 932898675, now seen corresponding path program 1 times [2023-08-04 07:22:19,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:22:19,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389053557] [2023-08-04 07:22:19,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:22:19,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:22:19,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:22:19,113 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 07:22:19,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:22:19,150 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 07:22:19,150 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 07:22:19,150 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 07:22:19,150 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 07:22:19,151 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 07:22:19,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-04 07:22:19,151 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 07:22:19,151 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 07:22:19,152 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 07:22:19,152 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 07:22:19,192 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 07:22:19,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 177 places, 169 transitions, 374 flow [2023-08-04 07:22:19,298 INFO L124 PetriNetUnfolderBase]: 93/1392 cut-off events. [2023-08-04 07:22:19,299 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 07:22:19,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1490 conditions, 1392 events. 93/1392 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 9345 event pairs, 0 based on Foata normal form. 0/1227 useless extension candidates. Maximal degree in co-relation 1015. Up to 54 conditions per place. [2023-08-04 07:22:19,303 INFO L82 GeneralOperation]: Start removeDead. Operand has 177 places, 169 transitions, 374 flow [2023-08-04 07:22:19,306 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 176 places, 168 transitions, 368 flow [2023-08-04 07:22:19,306 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:22:19,306 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 176 places, 168 transitions, 368 flow [2023-08-04 07:22:19,306 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 176 places, 168 transitions, 368 flow [2023-08-04 07:22:19,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 176 places, 168 transitions, 368 flow [2023-08-04 07:22:19,403 INFO L124 PetriNetUnfolderBase]: 93/1391 cut-off events. [2023-08-04 07:22:19,403 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2023-08-04 07:22:19,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1487 conditions, 1391 events. 93/1391 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 9330 event pairs, 0 based on Foata normal form. 0/1226 useless extension candidates. Maximal degree in co-relation 1012. Up to 54 conditions per place. [2023-08-04 07:22:19,423 INFO L119 LiptonReduction]: Number of co-enabled transitions 5684 [2023-08-04 07:22:26,696 INFO L134 LiptonReduction]: Checked pairs total: 16458 [2023-08-04 07:22:26,696 INFO L136 LiptonReduction]: Total number of compositions: 136 [2023-08-04 07:22:26,697 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:22:26,698 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;@349b03ae, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:22:26,698 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 07:22:26,700 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:22:26,700 INFO L124 PetriNetUnfolderBase]: 1/15 cut-off events. [2023-08-04 07:22:26,700 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:22:26,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:22:26,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 07:22:26,700 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 07:22:26,700 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:22:26,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1313086531, now seen corresponding path program 1 times [2023-08-04 07:22:26,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:22:26,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442467135] [2023-08-04 07:22:26,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:22:26,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:22:26,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:22:26,732 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 07:22:26,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:22:26,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442467135] [2023-08-04 07:22:26,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442467135] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:22:26,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:22:26,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:22:26,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798642545] [2023-08-04 07:22:26,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:22:26,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:22:26,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:22:26,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:22:26,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:22:26,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 305 [2023-08-04 07:22:26,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 49 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 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 07:22:26,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:22:26,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 305 [2023-08-04 07:22:26,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:23:47,652 INFO L124 PetriNetUnfolderBase]: 468866/605197 cut-off events. [2023-08-04 07:23:47,652 INFO L125 PetriNetUnfolderBase]: For 8724/8724 co-relation queries the response was YES. [2023-08-04 07:23:49,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1203087 conditions, 605197 events. 468866/605197 cut-off events. For 8724/8724 co-relation queries the response was YES. Maximal size of possible extension queue 13351. Compared 3972458 event pairs, 380024 based on Foata normal form. 13020/532421 useless extension candidates. Maximal degree in co-relation 259563. Up to 587323 conditions per place. [2023-08-04 07:23:51,001 INFO L140 encePairwiseOnDemand]: 301/305 looper letters, 44 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2023-08-04 07:23:51,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 53 transitions, 230 flow [2023-08-04 07:23:51,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:23:51,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:23:51,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 465 transitions. [2023-08-04 07:23:51,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5081967213114754 [2023-08-04 07:23:51,003 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 465 transitions. [2023-08-04 07:23:51,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 465 transitions. [2023-08-04 07:23:51,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:23:51,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 465 transitions. [2023-08-04 07:23:51,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 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 07:23:51,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 305.0) internal successors, (1220), 4 states have internal predecessors, (1220), 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 07:23:51,006 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 305.0) internal successors, (1220), 4 states have internal predecessors, (1220), 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 07:23:51,006 INFO L175 Difference]: Start difference. First operand has 61 places, 49 transitions, 130 flow. Second operand 3 states and 465 transitions. [2023-08-04 07:23:51,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 53 transitions, 230 flow [2023-08-04 07:23:51,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 53 transitions, 226 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-04 07:23:51,015 INFO L231 Difference]: Finished difference. Result has 64 places, 49 transitions, 136 flow [2023-08-04 07:23:51,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=64, PETRI_TRANSITIONS=49} [2023-08-04 07:23:51,016 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 3 predicate places. [2023-08-04 07:23:51,016 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 49 transitions, 136 flow [2023-08-04 07:23:51,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 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 07:23:51,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:23:51,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:23:51,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-04 07:23:51,016 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 07:23:51,017 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:23:51,017 INFO L85 PathProgramCache]: Analyzing trace with hash 918034853, now seen corresponding path program 1 times [2023-08-04 07:23:51,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:23:51,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257178927] [2023-08-04 07:23:51,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:23:51,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:23:51,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:23:51,049 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 07:23:51,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:23:51,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257178927] [2023-08-04 07:23:51,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257178927] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:23:51,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183029273] [2023-08-04 07:23:51,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:23:51,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:23:51,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:23:51,052 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 07:23:51,052 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 07:23:51,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:23:51,150 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:23:51,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:23:51,160 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 07:23:51,161 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:23:51,172 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 07:23:51,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183029273] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:23:51,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:23:51,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 07:23:51,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607126480] [2023-08-04 07:23:51,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:23:51,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:23:51,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:23:51,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:23:51,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:23:51,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 305 [2023-08-04 07:23:51,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 49 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 140.4) internal successors, (702), 5 states have internal predecessors, (702), 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 07:23:51,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:23:51,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 305 [2023-08-04 07:23:51,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand