/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_safe020_power_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 07:10:35,200 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 07:10:35,234 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 07:10:35,236 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 07:10:35,237 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 07:10:35,237 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 07:10:35,237 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 07:10:35,251 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 07:10:35,251 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 07:10:35,252 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 07:10:35,252 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 07:10:35,252 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 07:10:35,253 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 07:10:35,253 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 07:10:35,253 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 07:10:35,253 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 07:10:35,253 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 07:10:35,254 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 07:10:35,254 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 07:10:35,254 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 07:10:35,254 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 07:10:35,259 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 07:10:35,259 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 07:10:35,260 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 07:10:35,263 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 07:10:35,263 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 07:10:35,263 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 07:10:35,264 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 07:10:35,265 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 07:10:35,265 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 07:10:35,265 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:10:35,266 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 07:10:35,266 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 07:10:35,266 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 07:10:35,266 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 07:10:35,266 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 07:10:35,266 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 07:10:35,266 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 07:10:35,266 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 07:10:35,266 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 07:10:35,267 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 07:10:35,267 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 07:10:35,437 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 07:10:35,455 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 07:10:35,457 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 07:10:35,458 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 07:10:35,458 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 07:10:35,459 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe020_power_bound2.i [2023-08-04 07:10:36,525 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 07:10:36,765 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 07:10:36,766 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe020_power_bound2.i [2023-08-04 07:10:36,783 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab39c298c/0e8bfd3ac696458895e9c4ac2cbdcde2/FLAG2cee579bf [2023-08-04 07:10:36,808 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab39c298c/0e8bfd3ac696458895e9c4ac2cbdcde2 [2023-08-04 07:10:36,810 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 07:10:36,811 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 07:10:36,814 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 07:10:36,814 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 07:10:36,818 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 07:10:36,819 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:10:36" (1/1) ... [2023-08-04 07:10:36,819 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e45a832 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:10:36, skipping insertion in model container [2023-08-04 07:10:36,819 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:10:36" (1/1) ... [2023-08-04 07:10:36,864 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 07:10:36,978 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_safe020_power_bound2.i[990,1003] [2023-08-04 07:10:37,166 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:10:37,178 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 07:10:37,191 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_safe020_power_bound2.i[990,1003] [2023-08-04 07:10:37,210 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-04 07:10:37,211 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-04 07:10:37,252 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:10:37,276 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 07:10:37,277 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 07:10:37,281 INFO L206 MainTranslator]: Completed translation [2023-08-04 07:10:37,283 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:10:37 WrapperNode [2023-08-04 07:10:37,283 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 07:10:37,284 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 07:10:37,284 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 07:10:37,284 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 07:10:37,288 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:10:37" (1/1) ... [2023-08-04 07:10:37,314 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:10:37" (1/1) ... [2023-08-04 07:10:37,330 INFO L138 Inliner]: procedures = 176, calls = 77, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 201 [2023-08-04 07:10:37,331 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 07:10:37,331 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 07:10:37,331 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 07:10:37,331 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 07:10:37,342 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:10:37" (1/1) ... [2023-08-04 07:10:37,342 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:10:37" (1/1) ... [2023-08-04 07:10:37,347 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:10:37" (1/1) ... [2023-08-04 07:10:37,347 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:10:37" (1/1) ... [2023-08-04 07:10:37,355 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:10:37" (1/1) ... [2023-08-04 07:10:37,358 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:10:37" (1/1) ... [2023-08-04 07:10:37,360 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:10:37" (1/1) ... [2023-08-04 07:10:37,361 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:10:37" (1/1) ... [2023-08-04 07:10:37,364 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 07:10:37,365 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 07:10:37,365 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 07:10:37,365 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 07:10:37,365 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:10:37" (1/1) ... [2023-08-04 07:10:37,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:10:37,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:10:37,433 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 07:10:37,451 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 07:10:37,462 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 07:10:37,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 07:10:37,462 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 07:10:37,462 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 07:10:37,463 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 07:10:37,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 07:10:37,464 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 07:10:37,464 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 07:10:37,464 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 07:10:37,464 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 07:10:37,465 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-04 07:10:37,465 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-04 07:10:37,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 07:10:37,465 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 07:10:37,465 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 07:10:37,465 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 07:10:37,466 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 07:10:37,610 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 07:10:37,612 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 07:10:37,975 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 07:10:38,151 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 07:10:38,151 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-04 07:10:38,154 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:10:38 BoogieIcfgContainer [2023-08-04 07:10:38,155 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 07:10:38,156 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 07:10:38,156 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 07:10:38,158 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 07:10:38,159 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 07:10:36" (1/3) ... [2023-08-04 07:10:38,160 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@270a3ea0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:10:38, skipping insertion in model container [2023-08-04 07:10:38,160 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:10:37" (2/3) ... [2023-08-04 07:10:38,160 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@270a3ea0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:10:38, skipping insertion in model container [2023-08-04 07:10:38,160 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:10:38" (3/3) ... [2023-08-04 07:10:38,161 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe020_power_bound2.i [2023-08-04 07:10:38,167 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 07:10:38,173 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 07:10:38,173 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-04 07:10:38,173 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 07:10:38,231 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 07:10:38,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 147 places, 145 transitions, 305 flow [2023-08-04 07:10:38,369 INFO L124 PetriNetUnfolderBase]: 30/464 cut-off events. [2023-08-04 07:10:38,369 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:10:38,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 489 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 1940 event pairs, 0 based on Foata normal form. 0/410 useless extension candidates. Maximal degree in co-relation 285. Up to 16 conditions per place. [2023-08-04 07:10:38,377 INFO L82 GeneralOperation]: Start removeDead. Operand has 147 places, 145 transitions, 305 flow [2023-08-04 07:10:38,386 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 146 places, 144 transitions, 301 flow [2023-08-04 07:10:38,388 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:10:38,393 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 146 places, 144 transitions, 301 flow [2023-08-04 07:10:38,395 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 146 places, 144 transitions, 301 flow [2023-08-04 07:10:38,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 146 places, 144 transitions, 301 flow [2023-08-04 07:10:38,470 INFO L124 PetriNetUnfolderBase]: 30/463 cut-off events. [2023-08-04 07:10:38,471 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:10:38,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 487 conditions, 463 events. 30/463 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1936 event pairs, 0 based on Foata normal form. 0/409 useless extension candidates. Maximal degree in co-relation 283. Up to 16 conditions per place. [2023-08-04 07:10:38,477 INFO L119 LiptonReduction]: Number of co-enabled transitions 2384 [2023-08-04 07:10:45,100 INFO L134 LiptonReduction]: Checked pairs total: 6003 [2023-08-04 07:10:45,100 INFO L136 LiptonReduction]: Total number of compositions: 130 [2023-08-04 07:10:45,109 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:10:45,113 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@8f9fa0f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:10:45,113 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 07:10:45,116 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:10:45,116 INFO L124 PetriNetUnfolderBase]: 0/13 cut-off events. [2023-08-04 07:10:45,116 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:10:45,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:10:45,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 07:10:45,120 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P1Err0ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:10:45,123 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:10:45,123 INFO L85 PathProgramCache]: Analyzing trace with hash 906390599, now seen corresponding path program 1 times [2023-08-04 07:10:45,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:10:45,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474032220] [2023-08-04 07:10:45,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:10:45,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:10:45,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:10:45,343 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 07:10:45,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:10:45,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474032220] [2023-08-04 07:10:45,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474032220] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:10:45,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:10:45,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:10:45,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321958092] [2023-08-04 07:10:45,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:10:45,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:10:45,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:10:45,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:10:45,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:10:45,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 275 [2023-08-04 07:10:45,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 29 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 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 07:10:45,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:10:45,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 275 [2023-08-04 07:10:45,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:10:45,905 INFO L124 PetriNetUnfolderBase]: 1677/2643 cut-off events. [2023-08-04 07:10:45,905 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-04 07:10:45,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5333 conditions, 2643 events. 1677/2643 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 13281 event pairs, 1008 based on Foata normal form. 0/2207 useless extension candidates. Maximal degree in co-relation 5320. Up to 2570 conditions per place. [2023-08-04 07:10:45,921 INFO L140 encePairwiseOnDemand]: 272/275 looper letters, 27 selfloop transitions, 2 changer transitions 1/33 dead transitions. [2023-08-04 07:10:45,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 33 transitions, 139 flow [2023-08-04 07:10:45,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:10:45,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:10:45,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 403 transitions. [2023-08-04 07:10:45,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48848484848484847 [2023-08-04 07:10:45,933 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 403 transitions. [2023-08-04 07:10:45,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 403 transitions. [2023-08-04 07:10:45,935 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:10:45,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 403 transitions. [2023-08-04 07:10:45,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 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 07:10:45,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 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 07:10:45,945 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 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 07:10:45,946 INFO L175 Difference]: Start difference. First operand has 36 places, 29 transitions, 71 flow. Second operand 3 states and 403 transitions. [2023-08-04 07:10:45,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 33 transitions, 139 flow [2023-08-04 07:10:45,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 33 transitions, 139 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 07:10:45,950 INFO L231 Difference]: Finished difference. Result has 39 places, 29 transitions, 79 flow [2023-08-04 07:10:45,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=79, PETRI_PLACES=39, PETRI_TRANSITIONS=29} [2023-08-04 07:10:45,954 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 3 predicate places. [2023-08-04 07:10:45,954 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 29 transitions, 79 flow [2023-08-04 07:10:45,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 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 07:10:45,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:10:45,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:10:45,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 07:10:45,955 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P1Err0ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:10:45,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:10:45,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1690599305, now seen corresponding path program 1 times [2023-08-04 07:10:45,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:10:45,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308715210] [2023-08-04 07:10:45,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:10:45,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:10:45,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:10:46,015 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 07:10:46,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:10:46,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308715210] [2023-08-04 07:10:46,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308715210] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:10:46,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549592551] [2023-08-04 07:10:46,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:10:46,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:10:46,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:10:46,035 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 07:10:46,057 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 07:10:46,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:10:46,166 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:10:46,169 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:10:46,222 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 07:10:46,223 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:10:46,233 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 07:10:46,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549592551] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:10:46,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:10:46,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 07:10:46,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758148538] [2023-08-04 07:10:46,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:10:46,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:10:46,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:10:46,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:10:46,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:10:46,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 275 [2023-08-04 07:10:46,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 29 transitions, 79 flow. Second operand has 5 states, 5 states have (on average 125.4) internal successors, (627), 5 states have internal predecessors, (627), 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 07:10:46,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:10:46,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 275 [2023-08-04 07:10:46,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:10:46,264 INFO L124 PetriNetUnfolderBase]: 6/20 cut-off events. [2023-08-04 07:10:46,264 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 07:10:46,264 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 30 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 07:10:46,264 INFO L140 encePairwiseOnDemand]: 272/275 looper letters, 0 selfloop transitions, 0 changer transitions 11/11 dead transitions. [2023-08-04 07:10:46,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 18 places, 11 transitions, 53 flow [2023-08-04 07:10:46,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:10:46,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:10:46,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 504 transitions. [2023-08-04 07:10:46,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4581818181818182 [2023-08-04 07:10:46,266 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 504 transitions. [2023-08-04 07:10:46,266 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 504 transitions. [2023-08-04 07:10:46,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:10:46,266 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 504 transitions. [2023-08-04 07:10:46,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 126.0) internal successors, (504), 4 states have internal predecessors, (504), 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 07:10:46,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 275.0) internal successors, (1375), 5 states have internal predecessors, (1375), 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 07:10:46,270 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 275.0) internal successors, (1375), 5 states have internal predecessors, (1375), 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 07:10:46,270 INFO L175 Difference]: Start difference. First operand has 39 places, 29 transitions, 79 flow. Second operand 4 states and 504 transitions. [2023-08-04 07:10:46,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 18 places, 11 transitions, 53 flow [2023-08-04 07:10:46,270 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 07:10:46,270 INFO L231 Difference]: Finished difference. Result has 15 places, 0 transitions, 0 flow [2023-08-04 07:10:46,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, 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 07:10:46,271 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -21 predicate places. [2023-08-04 07:10:46,271 INFO L495 AbstractCegarLoop]: Abstraction has has 15 places, 0 transitions, 0 flow [2023-08-04 07:10:46,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 125.4) internal successors, (627), 5 states have internal predecessors, (627), 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 07:10:46,273 INFO L805 garLoopResultBuilder]: Registering result SAFE for location P1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-04 07:10:46,273 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-04 07:10:46,274 INFO L805 garLoopResultBuilder]: Registering result SAFE for location P1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-04 07:10:46,281 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 07:10:46,478 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 07:10:46,478 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 07:10:46,480 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE (1/2) [2023-08-04 07:10:46,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 147 places, 145 transitions, 305 flow [2023-08-04 07:10:46,527 INFO L124 PetriNetUnfolderBase]: 30/464 cut-off events. [2023-08-04 07:10:46,527 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:10:46,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 489 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 1940 event pairs, 0 based on Foata normal form. 0/410 useless extension candidates. Maximal degree in co-relation 285. Up to 16 conditions per place. [2023-08-04 07:10:46,527 INFO L82 GeneralOperation]: Start removeDead. Operand has 147 places, 145 transitions, 305 flow [2023-08-04 07:10:46,528 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 121 places, 116 transitions, 247 flow [2023-08-04 07:10:46,528 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:10:46,528 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 121 places, 116 transitions, 247 flow [2023-08-04 07:10:46,529 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 121 places, 116 transitions, 247 flow [2023-08-04 07:10:46,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 116 transitions, 247 flow [2023-08-04 07:10:46,547 INFO L124 PetriNetUnfolderBase]: 6/232 cut-off events. [2023-08-04 07:10:46,548 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:10:46,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257 conditions, 232 events. 6/232 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 623 event pairs, 0 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 169. Up to 8 conditions per place. [2023-08-04 07:10:46,549 INFO L119 LiptonReduction]: Number of co-enabled transitions 1236 [2023-08-04 07:10:51,624 INFO L134 LiptonReduction]: Checked pairs total: 3095 [2023-08-04 07:10:51,632 INFO L136 LiptonReduction]: Total number of compositions: 97 [2023-08-04 07:10:51,639 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 07:10:51,640 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;@8f9fa0f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:10:51,641 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 07:10:51,644 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:10:51,644 INFO L124 PetriNetUnfolderBase]: 0/22 cut-off events. [2023-08-04 07:10:51,644 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:10:51,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:10:51,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 07:10:51,645 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 07:10:51,645 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:10:51,645 INFO L85 PathProgramCache]: Analyzing trace with hash 915946536, now seen corresponding path program 1 times [2023-08-04 07:10:51,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:10:51,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056093975] [2023-08-04 07:10:51,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:10:51,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:10:51,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:10:51,681 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 07:10:51,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:10:51,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056093975] [2023-08-04 07:10:51,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056093975] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:10:51,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:10:51,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:10:51,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429561526] [2023-08-04 07:10:51,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:10:51,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:10:51,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:10:51,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:10:51,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:10:51,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 242 [2023-08-04 07:10:51,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 25 transitions, 65 flow. Second operand has 3 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 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 07:10:51,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:10:51,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 242 [2023-08-04 07:10:51,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:10:51,813 INFO L124 PetriNetUnfolderBase]: 467/805 cut-off events. [2023-08-04 07:10:51,813 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-04 07:10:51,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1665 conditions, 805 events. 467/805 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3504 event pairs, 248 based on Foata normal form. 0/713 useless extension candidates. Maximal degree in co-relation 1644. Up to 760 conditions per place. [2023-08-04 07:10:51,816 INFO L140 encePairwiseOnDemand]: 239/242 looper letters, 23 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2023-08-04 07:10:51,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 29 transitions, 123 flow [2023-08-04 07:10:51,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:10:51,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:10:51,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 398 transitions. [2023-08-04 07:10:51,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5482093663911846 [2023-08-04 07:10:51,818 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 398 transitions. [2023-08-04 07:10:51,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 398 transitions. [2023-08-04 07:10:51,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:10:51,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 398 transitions. [2023-08-04 07:10:51,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 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 07:10:51,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 242.0) internal successors, (968), 4 states have internal predecessors, (968), 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 07:10:51,820 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 242.0) internal successors, (968), 4 states have internal predecessors, (968), 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 07:10:51,820 INFO L175 Difference]: Start difference. First operand has 32 places, 25 transitions, 65 flow. Second operand 3 states and 398 transitions. [2023-08-04 07:10:51,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 29 transitions, 123 flow [2023-08-04 07:10:51,821 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 07:10:51,821 INFO L231 Difference]: Finished difference. Result has 35 places, 25 transitions, 73 flow [2023-08-04 07:10:51,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=242, 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 07:10:51,822 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 3 predicate places. [2023-08-04 07:10:51,822 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 25 transitions, 73 flow [2023-08-04 07:10:51,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 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 07:10:51,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:10:51,823 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 07:10:51,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 07:10:51,823 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 07:10:51,823 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:10:51,823 INFO L85 PathProgramCache]: Analyzing trace with hash 908758506, now seen corresponding path program 1 times [2023-08-04 07:10:51,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:10:51,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599953807] [2023-08-04 07:10:51,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:10:51,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:10:51,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:10:51,851 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 07:10:51,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:10:51,881 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 07:10:51,882 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 07:10:51,882 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 07:10:51,882 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 07:10:51,882 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 07:10:51,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-04 07:10:51,882 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 07:10:51,883 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 07:10:51,883 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 07:10:51,883 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 07:10:51,935 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 07:10:51,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 176 places, 168 transitions, 372 flow [2023-08-04 07:10:52,045 INFO L124 PetriNetUnfolderBase]: 93/1391 cut-off events. [2023-08-04 07:10:52,047 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 07:10:52,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1489 conditions, 1391 events. 93/1391 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 9361 event pairs, 0 based on Foata normal form. 0/1226 useless extension candidates. Maximal degree in co-relation 1014. Up to 54 conditions per place. [2023-08-04 07:10:52,054 INFO L82 GeneralOperation]: Start removeDead. Operand has 176 places, 168 transitions, 372 flow [2023-08-04 07:10:52,057 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 175 places, 167 transitions, 366 flow [2023-08-04 07:10:52,057 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:10:52,057 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 175 places, 167 transitions, 366 flow [2023-08-04 07:10:52,057 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 175 places, 167 transitions, 366 flow [2023-08-04 07:10:52,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 167 transitions, 366 flow [2023-08-04 07:10:52,157 INFO L124 PetriNetUnfolderBase]: 93/1390 cut-off events. [2023-08-04 07:10:52,157 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2023-08-04 07:10:52,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1486 conditions, 1390 events. 93/1390 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 9339 event pairs, 0 based on Foata normal form. 0/1225 useless extension candidates. Maximal degree in co-relation 1011. Up to 54 conditions per place. [2023-08-04 07:10:52,177 INFO L119 LiptonReduction]: Number of co-enabled transitions 5684 [2023-08-04 07:11:00,818 INFO L134 LiptonReduction]: Checked pairs total: 16931 [2023-08-04 07:11:00,818 INFO L136 LiptonReduction]: Total number of compositions: 137 [2023-08-04 07:11:00,820 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:11:00,820 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;@8f9fa0f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:11:00,820 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 07:11:00,823 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:11:00,823 INFO L124 PetriNetUnfolderBase]: 0/16 cut-off events. [2023-08-04 07:11:00,823 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:11:00,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:11:00,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 07:11:00,823 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 07:11:00,824 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:11:00,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1312065085, now seen corresponding path program 1 times [2023-08-04 07:11:00,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:11:00,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313942072] [2023-08-04 07:11:00,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:11:00,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:11:00,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:11:00,871 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 07:11:00,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:11:00,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313942072] [2023-08-04 07:11:00,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313942072] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:11:00,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:11:00,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:11:00,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649516794] [2023-08-04 07:11:00,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:11:00,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:11:00,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:11:00,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:11:00,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:11:00,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 305 [2023-08-04 07:11:00,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 46 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 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 07:11:00,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:11:00,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 305 [2023-08-04 07:11:00,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:12:05,830 INFO L124 PetriNetUnfolderBase]: 363272/469931 cut-off events. [2023-08-04 07:12:05,830 INFO L125 PetriNetUnfolderBase]: For 8756/8756 co-relation queries the response was YES. [2023-08-04 07:12:06,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 936187 conditions, 469931 events. 363272/469931 cut-off events. For 8756/8756 co-relation queries the response was YES. Maximal size of possible extension queue 10705. Compared 3040463 event pairs, 293960 based on Foata normal form. 0/407131 useless extension candidates. Maximal degree in co-relation 202012. Up to 455689 conditions per place. [2023-08-04 07:12:08,069 INFO L140 encePairwiseOnDemand]: 302/305 looper letters, 42 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2023-08-04 07:12:08,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 51 transitions, 222 flow [2023-08-04 07:12:08,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:12:08,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:12:08,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 459 transitions. [2023-08-04 07:12:08,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5016393442622951 [2023-08-04 07:12:08,071 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 459 transitions. [2023-08-04 07:12:08,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 459 transitions. [2023-08-04 07:12:08,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:12:08,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 459 transitions. [2023-08-04 07:12:08,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 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 07:12:08,073 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 07:12:08,073 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 07:12:08,074 INFO L175 Difference]: Start difference. First operand has 59 places, 46 transitions, 124 flow. Second operand 3 states and 459 transitions. [2023-08-04 07:12:08,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 51 transitions, 222 flow [2023-08-04 07:12:08,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 51 transitions, 218 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-04 07:12:08,082 INFO L231 Difference]: Finished difference. Result has 62 places, 47 transitions, 132 flow [2023-08-04 07:12:08,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=120, 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=132, PETRI_PLACES=62, PETRI_TRANSITIONS=47} [2023-08-04 07:12:08,082 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 3 predicate places. [2023-08-04 07:12:08,082 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 47 transitions, 132 flow [2023-08-04 07:12:08,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 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 07:12:08,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:12:08,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:12:08,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-04 07:12:08,083 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 07:12:08,083 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:12:08,083 INFO L85 PathProgramCache]: Analyzing trace with hash 2043138749, now seen corresponding path program 1 times [2023-08-04 07:12:08,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:12:08,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607904600] [2023-08-04 07:12:08,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:12:08,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:12:08,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:12:08,111 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 07:12:08,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:12:08,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607904600] [2023-08-04 07:12:08,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607904600] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:12:08,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698681197] [2023-08-04 07:12:08,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:12:08,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:12:08,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:12:08,113 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 07:12:08,114 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 07:12:08,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:12:08,220 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:12:08,220 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:12:08,231 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 07:12:08,232 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:12:08,244 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 07:12:08,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698681197] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:12:08,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:12:08,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 07:12:08,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149260407] [2023-08-04 07:12:08,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:12:08,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:12:08,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:12:08,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:12:08,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:12:08,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 305 [2023-08-04 07:12:08,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 47 transitions, 132 flow. Second operand has 5 states, 5 states have (on average 139.4) internal successors, (697), 5 states have internal predecessors, (697), 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 07:12:08,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:12:08,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 305 [2023-08-04 07:12:08,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:13:00,262 INFO L124 PetriNetUnfolderBase]: 301714/387141 cut-off events. [2023-08-04 07:13:00,263 INFO L125 PetriNetUnfolderBase]: For 6344/6344 co-relation queries the response was YES. [2023-08-04 07:13:01,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 770694 conditions, 387141 events. 301714/387141 cut-off events. For 6344/6344 co-relation queries the response was YES. Maximal size of possible extension queue 9253. Compared 2402148 event pairs, 190828 based on Foata normal form. 4/336921 useless extension candidates. Maximal degree in co-relation 201906. Up to 375577 conditions per place. [2023-08-04 07:13:02,341 INFO L140 encePairwiseOnDemand]: 301/305 looper letters, 47 selfloop transitions, 3 changer transitions 1/58 dead transitions. [2023-08-04 07:13:02,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 58 transitions, 256 flow [2023-08-04 07:13:02,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:13:02,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:13:02,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 600 transitions. [2023-08-04 07:13:02,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4918032786885246 [2023-08-04 07:13:02,343 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 600 transitions. [2023-08-04 07:13:02,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 600 transitions. [2023-08-04 07:13:02,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:13:02,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 600 transitions. [2023-08-04 07:13:02,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 150.0) internal successors, (600), 4 states have internal predecessors, (600), 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 07:13:02,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 305.0) internal successors, (1525), 5 states have internal predecessors, (1525), 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 07:13:02,346 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 305.0) internal successors, (1525), 5 states have internal predecessors, (1525), 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 07:13:02,347 INFO L175 Difference]: Start difference. First operand has 62 places, 47 transitions, 132 flow. Second operand 4 states and 600 transitions. [2023-08-04 07:13:02,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 58 transitions, 256 flow [2023-08-04 07:13:02,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 58 transitions, 254 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:13:02,349 INFO L231 Difference]: Finished difference. Result has 66 places, 47 transitions, 144 flow [2023-08-04 07:13:02,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=61, 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=144, PETRI_PLACES=66, PETRI_TRANSITIONS=47} [2023-08-04 07:13:02,349 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 7 predicate places. [2023-08-04 07:13:02,350 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 47 transitions, 144 flow [2023-08-04 07:13:02,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.4) internal successors, (697), 5 states have internal predecessors, (697), 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 07:13:02,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:13:02,350 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:13:02,355 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-04 07:13:02,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-08-04 07:13:02,555 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 07:13:02,556 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:13:02,556 INFO L85 PathProgramCache]: Analyzing trace with hash 247929470, now seen corresponding path program 1 times [2023-08-04 07:13:02,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:13:02,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7779169] [2023-08-04 07:13:02,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:13:02,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:13:02,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:13:02,679 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 07:13:02,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:13:02,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7779169] [2023-08-04 07:13:02,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7779169] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:13:02,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:13:02,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 07:13:02,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022795799] [2023-08-04 07:13:02,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:13:02,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:13:02,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:13:02,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:13:02,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:13:02,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 305 [2023-08-04 07:13:02,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 47 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 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 07:13:02,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:13:02,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 305 [2023-08-04 07:13:02,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand