/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_queue_longest_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 07:50:42,389 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 07:50:42,443 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 07:50:42,446 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 07:50:42,446 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 07:50:42,446 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 07:50:42,447 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 07:50:42,458 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 07:50:42,459 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 07:50:42,459 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 07:50:42,460 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 07:50:42,460 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 07:50:42,460 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 07:50:42,460 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 07:50:42,461 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 07:50:42,461 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 07:50:42,461 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 07:50:42,461 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 07:50:42,462 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 07:50:42,462 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 07:50:42,462 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 07:50:42,462 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 07:50:42,463 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 07:50:42,463 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 07:50:42,463 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 07:50:42,463 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 07:50:42,463 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 07:50:42,464 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 07:50:42,464 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 07:50:42,464 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 07:50:42,464 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:50:42,464 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 07:50:42,465 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 07:50:42,465 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 07:50:42,465 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 07:50:42,465 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 07:50:42,465 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 07:50:42,466 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 07:50:42,466 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 07:50:42,466 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 07:50:42,466 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 07:50:42,466 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 07:50:42,612 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 07:50:42,625 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 07:50:42,627 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 07:50:42,628 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 07:50:42,628 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 07:50:42,629 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread_queue_longest_bound2.i [2023-08-04 07:50:43,628 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 07:50:43,891 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 07:50:43,892 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread_queue_longest_bound2.i [2023-08-04 07:50:43,905 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/629baf631/61704fbb3193472da2531051fddbf68d/FLAGf31ae081b [2023-08-04 07:50:43,917 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/629baf631/61704fbb3193472da2531051fddbf68d [2023-08-04 07:50:43,921 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 07:50:43,922 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 07:50:43,924 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 07:50:43,925 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 07:50:43,927 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 07:50:43,928 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:50:43" (1/1) ... [2023-08-04 07:50:43,929 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@494deed2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:50:43, skipping insertion in model container [2023-08-04 07:50:43,929 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:50:43" (1/1) ... [2023-08-04 07:50:43,968 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 07:50:44,275 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_queue_longest_bound2.i[43296,43309] [2023-08-04 07:50:44,280 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_queue_longest_bound2.i[43503,43516] [2023-08-04 07:50:44,286 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_queue_longest_bound2.i[43789,43802] [2023-08-04 07:50:44,291 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:50:44,302 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 07:50:44,324 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [258] [2023-08-04 07:50:44,326 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [258] [2023-08-04 07:50:44,331 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [750] [2023-08-04 07:50:44,346 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_queue_longest_bound2.i[43296,43309] [2023-08-04 07:50:44,350 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_queue_longest_bound2.i[43503,43516] [2023-08-04 07:50:44,353 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_queue_longest_bound2.i[43789,43802] [2023-08-04 07:50:44,355 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:50:44,418 INFO L206 MainTranslator]: Completed translation [2023-08-04 07:50:44,419 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:50:44 WrapperNode [2023-08-04 07:50:44,419 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 07:50:44,420 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 07:50:44,421 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 07:50:44,421 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 07:50:44,427 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:50:44" (1/1) ... [2023-08-04 07:50:44,440 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:50:44" (1/1) ... [2023-08-04 07:50:44,477 INFO L138 Inliner]: procedures = 274, calls = 60, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 275 [2023-08-04 07:50:44,477 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 07:50:44,478 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 07:50:44,478 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 07:50:44,478 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 07:50:44,484 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:50:44" (1/1) ... [2023-08-04 07:50:44,484 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:50:44" (1/1) ... [2023-08-04 07:50:44,488 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:50:44" (1/1) ... [2023-08-04 07:50:44,488 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:50:44" (1/1) ... [2023-08-04 07:50:44,495 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:50:44" (1/1) ... [2023-08-04 07:50:44,505 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:50:44" (1/1) ... [2023-08-04 07:50:44,507 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:50:44" (1/1) ... [2023-08-04 07:50:44,509 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:50:44" (1/1) ... [2023-08-04 07:50:44,512 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 07:50:44,512 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 07:50:44,512 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 07:50:44,513 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 07:50:44,513 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:50:44" (1/1) ... [2023-08-04 07:50:44,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:50:44,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:50:44,569 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 07:50:44,586 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 07:50:44,607 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-04 07:50:44,608 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-04 07:50:44,608 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-04 07:50:44,608 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-04 07:50:44,608 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 07:50:44,608 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 07:50:44,608 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 07:50:44,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 07:50:44,608 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-04 07:50:44,608 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 07:50:44,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 07:50:44,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 07:50:44,609 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 07:50:44,610 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 07:50:44,731 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 07:50:44,733 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 07:50:44,994 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 07:50:45,002 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 07:50:45,002 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-04 07:50:45,004 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:50:45 BoogieIcfgContainer [2023-08-04 07:50:45,004 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 07:50:45,006 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 07:50:45,007 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 07:50:45,009 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 07:50:45,010 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 07:50:43" (1/3) ... [2023-08-04 07:50:45,013 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13beb851 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:50:45, skipping insertion in model container [2023-08-04 07:50:45,013 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:50:44" (2/3) ... [2023-08-04 07:50:45,013 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13beb851 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:50:45, skipping insertion in model container [2023-08-04 07:50:45,013 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:50:45" (3/3) ... [2023-08-04 07:50:45,020 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread_queue_longest_bound2.i [2023-08-04 07:50:45,027 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 07:50:45,037 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 07:50:45,037 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2023-08-04 07:50:45,037 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 07:50:45,127 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 07:50:45,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 270 places, 288 transitions, 598 flow [2023-08-04 07:50:45,360 INFO L124 PetriNetUnfolderBase]: 42/448 cut-off events. [2023-08-04 07:50:45,361 INFO L125 PetriNetUnfolderBase]: For 8/12 co-relation queries the response was YES. [2023-08-04 07:50:45,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 468 conditions, 448 events. 42/448 cut-off events. For 8/12 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1543 event pairs, 0 based on Foata normal form. 0/394 useless extension candidates. Maximal degree in co-relation 252. Up to 8 conditions per place. [2023-08-04 07:50:45,376 INFO L82 GeneralOperation]: Start removeDead. Operand has 270 places, 288 transitions, 598 flow [2023-08-04 07:50:45,385 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 270 places, 288 transitions, 598 flow [2023-08-04 07:50:45,392 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:50:45,407 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 270 places, 288 transitions, 598 flow [2023-08-04 07:50:45,409 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 270 places, 288 transitions, 598 flow [2023-08-04 07:50:45,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 270 places, 288 transitions, 598 flow [2023-08-04 07:50:45,474 INFO L124 PetriNetUnfolderBase]: 42/448 cut-off events. [2023-08-04 07:50:45,475 INFO L125 PetriNetUnfolderBase]: For 8/12 co-relation queries the response was YES. [2023-08-04 07:50:45,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 468 conditions, 448 events. 42/448 cut-off events. For 8/12 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1543 event pairs, 0 based on Foata normal form. 0/394 useless extension candidates. Maximal degree in co-relation 252. Up to 8 conditions per place. [2023-08-04 07:50:45,492 INFO L119 LiptonReduction]: Number of co-enabled transitions 29746 [2023-08-04 07:50:52,685 INFO L134 LiptonReduction]: Checked pairs total: 58073 [2023-08-04 07:50:52,686 INFO L136 LiptonReduction]: Total number of compositions: 242 [2023-08-04 07:50:52,695 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:50:52,706 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;@400b33e0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:50:52,706 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-04 07:50:52,707 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:50:52,707 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-04 07:50:52,707 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:50:52,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:50:52,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-04 07:50:52,708 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-04 07:50:52,712 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:50:52,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1124, now seen corresponding path program 1 times [2023-08-04 07:50:52,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:50:52,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782416534] [2023-08-04 07:50:52,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:50:52,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:50:52,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:50:52,813 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 07:50:52,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:50:52,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782416534] [2023-08-04 07:50:52,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782416534] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:50:52,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:50:52,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-04 07:50:52,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498724701] [2023-08-04 07:50:52,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:50:52,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-04 07:50:52,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:50:52,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-04 07:50:52,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-04 07:50:52,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 269 out of 530 [2023-08-04 07:50:52,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 80 transitions, 182 flow. Second operand has 2 states, 2 states have (on average 269.5) internal successors, (539), 2 states have internal predecessors, (539), 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 07:50:52,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:50:52,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 269 of 530 [2023-08-04 07:50:52,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:50:54,011 INFO L124 PetriNetUnfolderBase]: 7512/12008 cut-off events. [2023-08-04 07:50:54,012 INFO L125 PetriNetUnfolderBase]: For 193/193 co-relation queries the response was YES. [2023-08-04 07:50:54,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23160 conditions, 12008 events. 7512/12008 cut-off events. For 193/193 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 68819 event pairs, 6096 based on Foata normal form. 140/9282 useless extension candidates. Maximal degree in co-relation 22322. Up to 11004 conditions per place. [2023-08-04 07:50:54,070 INFO L140 encePairwiseOnDemand]: 527/530 looper letters, 64 selfloop transitions, 0 changer transitions 0/77 dead transitions. [2023-08-04 07:50:54,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 77 transitions, 304 flow [2023-08-04 07:50:54,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-04 07:50:54,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-04 07:50:54,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 605 transitions. [2023-08-04 07:50:54,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5707547169811321 [2023-08-04 07:50:54,090 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 605 transitions. [2023-08-04 07:50:54,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 605 transitions. [2023-08-04 07:50:54,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:50:54,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 605 transitions. [2023-08-04 07:50:54,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 302.5) internal successors, (605), 2 states have internal predecessors, (605), 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 07:50:54,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 530.0) internal successors, (1590), 3 states have internal predecessors, (1590), 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 07:50:54,113 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 530.0) internal successors, (1590), 3 states have internal predecessors, (1590), 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 07:50:54,115 INFO L175 Difference]: Start difference. First operand has 71 places, 80 transitions, 182 flow. Second operand 2 states and 605 transitions. [2023-08-04 07:50:54,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 77 transitions, 304 flow [2023-08-04 07:50:54,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 77 transitions, 304 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 07:50:54,127 INFO L231 Difference]: Finished difference. Result has 71 places, 77 transitions, 176 flow [2023-08-04 07:50:54,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=530, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=176, PETRI_PLACES=71, PETRI_TRANSITIONS=77} [2023-08-04 07:50:54,132 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 0 predicate places. [2023-08-04 07:50:54,133 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 77 transitions, 176 flow [2023-08-04 07:50:54,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 269.5) internal successors, (539), 2 states have internal predecessors, (539), 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 07:50:54,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:50:54,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:50:54,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 07:50:54,134 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-04 07:50:54,139 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:50:54,140 INFO L85 PathProgramCache]: Analyzing trace with hash -623314610, now seen corresponding path program 1 times [2023-08-04 07:50:54,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:50:54,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839195637] [2023-08-04 07:50:54,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:50:54,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:50:54,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:50:54,323 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 07:50:54,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:50:54,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839195637] [2023-08-04 07:50:54,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839195637] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:50:54,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:50:54,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 07:50:54,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113066942] [2023-08-04 07:50:54,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:50:54,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:50:54,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:50:54,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:50:54,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:50:54,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 530 [2023-08-04 07:50:54,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 77 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 267.3333333333333) internal successors, (802), 3 states have internal predecessors, (802), 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 07:50:54,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:50:54,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 530 [2023-08-04 07:50:54,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:50:55,456 INFO L124 PetriNetUnfolderBase]: 7372/11884 cut-off events. [2023-08-04 07:50:55,456 INFO L125 PetriNetUnfolderBase]: For 193/193 co-relation queries the response was YES. [2023-08-04 07:50:55,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22897 conditions, 11884 events. 7372/11884 cut-off events. For 193/193 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 69096 event pairs, 5852 based on Foata normal form. 0/9161 useless extension candidates. Maximal degree in co-relation 22892. Up to 10314 conditions per place. [2023-08-04 07:50:55,504 INFO L140 encePairwiseOnDemand]: 526/530 looper letters, 92 selfloop transitions, 3 changer transitions 0/108 dead transitions. [2023-08-04 07:50:55,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 108 transitions, 437 flow [2023-08-04 07:50:55,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:50:55,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:50:55,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 888 transitions. [2023-08-04 07:50:55,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5584905660377358 [2023-08-04 07:50:55,507 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 888 transitions. [2023-08-04 07:50:55,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 888 transitions. [2023-08-04 07:50:55,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:50:55,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 888 transitions. [2023-08-04 07:50:55,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 296.0) internal successors, (888), 3 states have internal predecessors, (888), 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 07:50:55,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 530.0) internal successors, (2120), 4 states have internal predecessors, (2120), 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 07:50:55,515 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 530.0) internal successors, (2120), 4 states have internal predecessors, (2120), 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 07:50:55,515 INFO L175 Difference]: Start difference. First operand has 71 places, 77 transitions, 176 flow. Second operand 3 states and 888 transitions. [2023-08-04 07:50:55,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 108 transitions, 437 flow [2023-08-04 07:50:55,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 108 transitions, 437 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 07:50:55,519 INFO L231 Difference]: Finished difference. Result has 73 places, 76 transitions, 180 flow [2023-08-04 07:50:55,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=530, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=73, PETRI_TRANSITIONS=76} [2023-08-04 07:50:55,520 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 2 predicate places. [2023-08-04 07:50:55,521 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 76 transitions, 180 flow [2023-08-04 07:50:55,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 267.3333333333333) internal successors, (802), 3 states have internal predecessors, (802), 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 07:50:55,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:50:55,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:50:55,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 07:50:55,522 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [t2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-04 07:50:55,522 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:50:55,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1824473094, now seen corresponding path program 1 times [2023-08-04 07:50:55,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:50:55,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868460943] [2023-08-04 07:50:55,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:50:55,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:50:55,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:50:55,582 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 07:50:55,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:50:55,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868460943] [2023-08-04 07:50:55,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868460943] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:50:55,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:50:55,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:50:55,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480624475] [2023-08-04 07:50:55,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:50:55,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:50:55,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:50:55,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:50:55,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:50:55,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 530 [2023-08-04 07:50:55,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 76 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 269.6666666666667) internal successors, (809), 3 states have internal predecessors, (809), 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 07:50:55,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:50:55,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 530 [2023-08-04 07:50:55,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:50:56,466 INFO L124 PetriNetUnfolderBase]: 7170/11330 cut-off events. [2023-08-04 07:50:56,467 INFO L125 PetriNetUnfolderBase]: For 561/561 co-relation queries the response was YES. [2023-08-04 07:50:56,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22534 conditions, 11330 events. 7170/11330 cut-off events. For 561/561 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 68077 event pairs, 2730 based on Foata normal form. 0/8673 useless extension candidates. Maximal degree in co-relation 22528. Up to 10561 conditions per place. [2023-08-04 07:50:56,511 INFO L140 encePairwiseOnDemand]: 527/530 looper letters, 89 selfloop transitions, 2 changer transitions 0/104 dead transitions. [2023-08-04 07:50:56,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 104 transitions, 424 flow [2023-08-04 07:50:56,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:50:56,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:50:56,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 887 transitions. [2023-08-04 07:50:56,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5578616352201258 [2023-08-04 07:50:56,515 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 887 transitions. [2023-08-04 07:50:56,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 887 transitions. [2023-08-04 07:50:56,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:50:56,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 887 transitions. [2023-08-04 07:50:56,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 295.6666666666667) internal successors, (887), 3 states have internal predecessors, (887), 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 07:50:56,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 530.0) internal successors, (2120), 4 states have internal predecessors, (2120), 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 07:50:56,522 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 530.0) internal successors, (2120), 4 states have internal predecessors, (2120), 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 07:50:56,522 INFO L175 Difference]: Start difference. First operand has 73 places, 76 transitions, 180 flow. Second operand 3 states and 887 transitions. [2023-08-04 07:50:56,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 104 transitions, 424 flow [2023-08-04 07:50:56,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 104 transitions, 412 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:50:56,526 INFO L231 Difference]: Finished difference. Result has 74 places, 76 transitions, 182 flow [2023-08-04 07:50:56,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=530, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=74, PETRI_TRANSITIONS=76} [2023-08-04 07:50:56,526 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 3 predicate places. [2023-08-04 07:50:56,527 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 76 transitions, 182 flow [2023-08-04 07:50:56,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 269.6666666666667) internal successors, (809), 3 states have internal predecessors, (809), 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 07:50:56,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:50:56,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:50:56,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 07:50:56,528 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-04 07:50:56,528 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:50:56,528 INFO L85 PathProgramCache]: Analyzing trace with hash -2002932447, now seen corresponding path program 1 times [2023-08-04 07:50:56,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:50:56,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065594089] [2023-08-04 07:50:56,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:50:56,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:50:56,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:50:57,749 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 07:50:57,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:50:57,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065594089] [2023-08-04 07:50:57,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065594089] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:50:57,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:50:57,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-04 07:50:57,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232369969] [2023-08-04 07:50:57,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:50:57,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-04 07:50:57,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:50:57,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-04 07:50:57,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-04 07:50:58,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 530 [2023-08-04 07:50:58,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 76 transitions, 182 flow. Second operand has 6 states, 6 states have (on average 242.16666666666666) internal successors, (1453), 6 states have internal predecessors, (1453), 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 07:50:58,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:50:58,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 530 [2023-08-04 07:50:58,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:50:59,041 INFO L124 PetriNetUnfolderBase]: 7880/12553 cut-off events. [2023-08-04 07:50:59,041 INFO L125 PetriNetUnfolderBase]: For 252/252 co-relation queries the response was YES. [2023-08-04 07:50:59,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24455 conditions, 12553 events. 7880/12553 cut-off events. For 252/252 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 72355 event pairs, 5422 based on Foata normal form. 0/9694 useless extension candidates. Maximal degree in co-relation 24448. Up to 11532 conditions per place. [2023-08-04 07:50:59,104 INFO L140 encePairwiseOnDemand]: 522/530 looper letters, 96 selfloop transitions, 14 changer transitions 0/121 dead transitions. [2023-08-04 07:50:59,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 121 transitions, 512 flow [2023-08-04 07:50:59,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-04 07:50:59,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-04 07:50:59,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1791 transitions. [2023-08-04 07:50:59,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48274932614555255 [2023-08-04 07:50:59,109 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1791 transitions. [2023-08-04 07:50:59,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1791 transitions. [2023-08-04 07:50:59,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:50:59,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1791 transitions. [2023-08-04 07:50:59,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 255.85714285714286) internal successors, (1791), 7 states have internal predecessors, (1791), 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 07:50:59,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 530.0) internal successors, (4240), 8 states have internal predecessors, (4240), 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 07:50:59,120 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 530.0) internal successors, (4240), 8 states have internal predecessors, (4240), 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 07:50:59,120 INFO L175 Difference]: Start difference. First operand has 74 places, 76 transitions, 182 flow. Second operand 7 states and 1791 transitions. [2023-08-04 07:50:59,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 121 transitions, 512 flow [2023-08-04 07:50:59,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 121 transitions, 500 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:50:59,125 INFO L231 Difference]: Finished difference. Result has 82 places, 89 transitions, 262 flow [2023-08-04 07:50:59,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=530, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=262, PETRI_PLACES=82, PETRI_TRANSITIONS=89} [2023-08-04 07:50:59,126 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 11 predicate places. [2023-08-04 07:50:59,126 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 89 transitions, 262 flow [2023-08-04 07:50:59,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 242.16666666666666) internal successors, (1453), 6 states have internal predecessors, (1453), 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 07:50:59,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:50:59,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:50:59,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-04 07:50:59,127 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-04 07:50:59,128 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:50:59,128 INFO L85 PathProgramCache]: Analyzing trace with hash 65751900, now seen corresponding path program 1 times [2023-08-04 07:50:59,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:50:59,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361761789] [2023-08-04 07:50:59,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:50:59,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:50:59,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:50:59,804 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 07:50:59,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:50:59,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361761789] [2023-08-04 07:50:59,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361761789] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:50:59,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:50:59,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-04 07:50:59,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673325953] [2023-08-04 07:50:59,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:50:59,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-04 07:50:59,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:50:59,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-04 07:50:59,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-08-04 07:51:00,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 530 [2023-08-04 07:51:00,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 89 transitions, 262 flow. Second operand has 10 states, 10 states have (on average 227.4) internal successors, (2274), 10 states have internal predecessors, (2274), 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 07:51:00,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:51:00,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 530 [2023-08-04 07:51:00,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:51:02,097 INFO L124 PetriNetUnfolderBase]: 7949/12699 cut-off events. [2023-08-04 07:51:02,097 INFO L125 PetriNetUnfolderBase]: For 1352/1352 co-relation queries the response was YES. [2023-08-04 07:51:02,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25984 conditions, 12699 events. 7949/12699 cut-off events. For 1352/1352 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 73899 event pairs, 5606 based on Foata normal form. 0/10414 useless extension candidates. Maximal degree in co-relation 25973. Up to 11511 conditions per place. [2023-08-04 07:51:02,171 INFO L140 encePairwiseOnDemand]: 518/530 looper letters, 88 selfloop transitions, 30 changer transitions 35/164 dead transitions. [2023-08-04 07:51:02,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 164 transitions, 771 flow [2023-08-04 07:51:02,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-04 07:51:02,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-04 07:51:02,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2864 transitions. [2023-08-04 07:51:02,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45031446540880504 [2023-08-04 07:51:02,180 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2864 transitions. [2023-08-04 07:51:02,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2864 transitions. [2023-08-04 07:51:02,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:51:02,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2864 transitions. [2023-08-04 07:51:02,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 238.66666666666666) internal successors, (2864), 12 states have internal predecessors, (2864), 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 07:51:02,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 530.0) internal successors, (6890), 13 states have internal predecessors, (6890), 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 07:51:02,199 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 530.0) internal successors, (6890), 13 states have internal predecessors, (6890), 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 07:51:02,199 INFO L175 Difference]: Start difference. First operand has 82 places, 89 transitions, 262 flow. Second operand 12 states and 2864 transitions. [2023-08-04 07:51:02,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 164 transitions, 771 flow [2023-08-04 07:51:02,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 164 transitions, 771 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 07:51:02,205 INFO L231 Difference]: Finished difference. Result has 95 places, 108 transitions, 418 flow [2023-08-04 07:51:02,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=530, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=418, PETRI_PLACES=95, PETRI_TRANSITIONS=108} [2023-08-04 07:51:02,206 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 24 predicate places. [2023-08-04 07:51:02,206 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 108 transitions, 418 flow [2023-08-04 07:51:02,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 227.4) internal successors, (2274), 10 states have internal predecessors, (2274), 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 07:51:02,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:51:02,207 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:51:02,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-04 07:51:02,208 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-04 07:51:02,208 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:51:02,208 INFO L85 PathProgramCache]: Analyzing trace with hash -781678687, now seen corresponding path program 1 times [2023-08-04 07:51:02,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:51:02,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725656817] [2023-08-04 07:51:02,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:51:02,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:51:02,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:51:02,659 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 07:51:02,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:51:02,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725656817] [2023-08-04 07:51:02,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725656817] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:51:02,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730016305] [2023-08-04 07:51:02,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:51:02,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:51:02,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:51:02,666 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 07:51:02,709 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 07:51:02,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:51:02,818 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-04 07:51:02,825 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:51:02,884 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-04 07:51:02,885 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-04 07:51:02,899 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 25 [2023-08-04 07:51:02,911 INFO L322 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-04 07:51:02,912 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-08-04 07:51:02,935 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 07:51:02,970 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 07:51:03,044 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-04 07:51:03,045 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2023-08-04 07:51:03,080 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-08-04 07:51:03,092 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 07:51:03,092 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:51:03,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730016305] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:51:03,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:51:03,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 11 [2023-08-04 07:51:03,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486438913] [2023-08-04 07:51:03,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:51:03,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-04 07:51:03,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:51:03,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-04 07:51:03,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-08-04 07:51:03,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 530 [2023-08-04 07:51:03,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 108 transitions, 418 flow. Second operand has 6 states, 6 states have (on average 244.5) internal successors, (1467), 6 states have internal predecessors, (1467), 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 07:51:03,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:51:03,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 530 [2023-08-04 07:51:03,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:51:04,360 INFO L124 PetriNetUnfolderBase]: 7936/12700 cut-off events. [2023-08-04 07:51:04,360 INFO L125 PetriNetUnfolderBase]: For 2591/2591 co-relation queries the response was YES. [2023-08-04 07:51:04,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27260 conditions, 12700 events. 7936/12700 cut-off events. For 2591/2591 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 74143 event pairs, 5629 based on Foata normal form. 1/10410 useless extension candidates. Maximal degree in co-relation 27246. Up to 11648 conditions per place. [2023-08-04 07:51:04,431 INFO L140 encePairwiseOnDemand]: 523/530 looper letters, 93 selfloop transitions, 15 changer transitions 23/142 dead transitions. [2023-08-04 07:51:04,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 142 transitions, 788 flow [2023-08-04 07:51:04,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-04 07:51:04,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-04 07:51:04,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2045 transitions. [2023-08-04 07:51:04,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.482311320754717 [2023-08-04 07:51:04,437 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2045 transitions. [2023-08-04 07:51:04,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2045 transitions. [2023-08-04 07:51:04,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:51:04,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2045 transitions. [2023-08-04 07:51:04,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 255.625) internal successors, (2045), 8 states have internal predecessors, (2045), 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 07:51:04,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 530.0) internal successors, (4770), 9 states have internal predecessors, (4770), 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 07:51:04,449 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 530.0) internal successors, (4770), 9 states have internal predecessors, (4770), 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 07:51:04,449 INFO L175 Difference]: Start difference. First operand has 95 places, 108 transitions, 418 flow. Second operand 8 states and 2045 transitions. [2023-08-04 07:51:04,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 142 transitions, 788 flow [2023-08-04 07:51:04,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 142 transitions, 754 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-04 07:51:04,463 INFO L231 Difference]: Finished difference. Result has 103 places, 111 transitions, 464 flow [2023-08-04 07:51:04,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=530, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=464, PETRI_PLACES=103, PETRI_TRANSITIONS=111} [2023-08-04 07:51:04,464 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 32 predicate places. [2023-08-04 07:51:04,464 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 111 transitions, 464 flow [2023-08-04 07:51:04,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 244.5) internal successors, (1467), 6 states have internal predecessors, (1467), 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 07:51:04,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:51:04,465 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:51:04,476 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 07:51:04,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-08-04 07:51:04,674 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-04 07:51:04,675 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:51:04,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1578709676, now seen corresponding path program 1 times [2023-08-04 07:51:04,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:51:04,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168012696] [2023-08-04 07:51:04,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:51:04,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:51:04,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:51:05,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:51:05,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:51:05,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168012696] [2023-08-04 07:51:05,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168012696] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:51:05,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847076581] [2023-08-04 07:51:05,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:51:05,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:51:05,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:51:05,617 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 07:51:05,633 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 07:51:05,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:51:05,755 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 57 conjunts are in the unsatisfiable core [2023-08-04 07:51:05,758 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:51:05,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 07:51:05,785 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-04 07:51:05,790 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 22 [2023-08-04 07:51:05,799 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-04 07:51:05,800 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-04 07:51:05,824 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2023-08-04 07:51:05,861 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2023-08-04 07:51:05,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 07:51:05,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 07:51:05,928 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2023-08-04 07:51:05,982 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2023-08-04 07:51:06,040 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2023-08-04 07:51:06,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 07:51:06,088 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2023-08-04 07:51:06,133 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 07:51:06,133 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:51:06,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847076581] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:51:06,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:51:06,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 18 [2023-08-04 07:51:06,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456856850] [2023-08-04 07:51:06,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:51:06,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-04 07:51:06,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:51:06,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-04 07:51:06,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2023-08-04 07:51:06,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 530 [2023-08-04 07:51:06,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 111 transitions, 464 flow. Second operand has 10 states, 10 states have (on average 229.6) internal successors, (2296), 10 states have internal predecessors, (2296), 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 07:51:06,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:51:06,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 530 [2023-08-04 07:51:06,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:51:07,628 INFO L124 PetriNetUnfolderBase]: 7929/12679 cut-off events. [2023-08-04 07:51:07,628 INFO L125 PetriNetUnfolderBase]: For 5466/5466 co-relation queries the response was YES. [2023-08-04 07:51:07,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28813 conditions, 12679 events. 7929/12679 cut-off events. For 5466/5466 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 73912 event pairs, 5627 based on Foata normal form. 0/10880 useless extension candidates. Maximal degree in co-relation 28796. Up to 11482 conditions per place. [2023-08-04 07:51:07,699 INFO L140 encePairwiseOnDemand]: 519/530 looper letters, 88 selfloop transitions, 21 changer transitions 43/163 dead transitions. [2023-08-04 07:51:07,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 163 transitions, 912 flow [2023-08-04 07:51:07,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-04 07:51:07,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-04 07:51:07,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1962 transitions. [2023-08-04 07:51:07,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46273584905660375 [2023-08-04 07:51:07,703 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1962 transitions. [2023-08-04 07:51:07,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1962 transitions. [2023-08-04 07:51:07,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:51:07,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1962 transitions. [2023-08-04 07:51:07,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 245.25) internal successors, (1962), 8 states have internal predecessors, (1962), 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 07:51:07,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 530.0) internal successors, (4770), 9 states have internal predecessors, (4770), 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 07:51:07,714 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 530.0) internal successors, (4770), 9 states have internal predecessors, (4770), 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 07:51:07,714 INFO L175 Difference]: Start difference. First operand has 103 places, 111 transitions, 464 flow. Second operand 8 states and 1962 transitions. [2023-08-04 07:51:07,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 163 transitions, 912 flow [2023-08-04 07:51:07,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 163 transitions, 895 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-04 07:51:07,732 INFO L231 Difference]: Finished difference. Result has 109 places, 103 transitions, 465 flow [2023-08-04 07:51:07,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=530, PETRI_DIFFERENCE_MINUEND_FLOW=447, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=465, PETRI_PLACES=109, PETRI_TRANSITIONS=103} [2023-08-04 07:51:07,732 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 38 predicate places. [2023-08-04 07:51:07,732 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 103 transitions, 465 flow [2023-08-04 07:51:07,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 229.6) internal successors, (2296), 10 states have internal predecessors, (2296), 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 07:51:07,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:51:07,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:51:07,753 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 07:51:07,939 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,SelfDestructingSolverStorable6 [2023-08-04 07:51:07,939 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-04 07:51:07,940 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:51:07,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1119810444, now seen corresponding path program 1 times [2023-08-04 07:51:07,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:51:07,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948452644] [2023-08-04 07:51:07,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:51:07,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:51:07,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:51:08,022 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 07:51:08,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:51:08,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948452644] [2023-08-04 07:51:08,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948452644] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:51:08,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724962148] [2023-08-04 07:51:08,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:51:08,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:51:08,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:51:08,025 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:51:08,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 07:51:08,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:51:08,142 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:51:08,142 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:51:08,152 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 07:51:08,152 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:51:08,164 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 07:51:08,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724962148] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:51:08,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:51:08,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 07:51:08,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429779529] [2023-08-04 07:51:08,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:51:08,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:51:08,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:51:08,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:51:08,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:51:08,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 530 [2023-08-04 07:51:08,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 103 transitions, 465 flow. Second operand has 5 states, 5 states have (on average 267.8) internal successors, (1339), 5 states have internal predecessors, (1339), 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 07:51:08,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:51:08,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 530 [2023-08-04 07:51:08,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:51:08,252 INFO L124 PetriNetUnfolderBase]: 48/142 cut-off events. [2023-08-04 07:51:08,252 INFO L125 PetriNetUnfolderBase]: For 167/167 co-relation queries the response was YES. [2023-08-04 07:51:08,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 466 conditions, 142 events. 48/142 cut-off events. For 167/167 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 287 event pairs, 7 based on Foata normal form. 28/156 useless extension candidates. Maximal degree in co-relation 446. Up to 87 conditions per place. [2023-08-04 07:51:08,252 INFO L140 encePairwiseOnDemand]: 527/530 looper letters, 24 selfloop transitions, 7 changer transitions 37/71 dead transitions. [2023-08-04 07:51:08,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 71 transitions, 451 flow [2023-08-04 07:51:08,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:51:08,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:51:08,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1111 transitions. [2023-08-04 07:51:08,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5240566037735849 [2023-08-04 07:51:08,255 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1111 transitions. [2023-08-04 07:51:08,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1111 transitions. [2023-08-04 07:51:08,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:51:08,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1111 transitions. [2023-08-04 07:51:08,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 277.75) internal successors, (1111), 4 states have internal predecessors, (1111), 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 07:51:08,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 530.0) internal successors, (2650), 5 states have internal predecessors, (2650), 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 07:51:08,259 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 530.0) internal successors, (2650), 5 states have internal predecessors, (2650), 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 07:51:08,259 INFO L175 Difference]: Start difference. First operand has 109 places, 103 transitions, 465 flow. Second operand 4 states and 1111 transitions. [2023-08-04 07:51:08,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 71 transitions, 451 flow [2023-08-04 07:51:08,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 71 transitions, 338 flow, removed 4 selfloop flow, removed 25 redundant places. [2023-08-04 07:51:08,260 INFO L231 Difference]: Finished difference. Result has 54 places, 29 transitions, 121 flow [2023-08-04 07:51:08,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=530, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=121, PETRI_PLACES=54, PETRI_TRANSITIONS=29} [2023-08-04 07:51:08,261 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -17 predicate places. [2023-08-04 07:51:08,261 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 29 transitions, 121 flow [2023-08-04 07:51:08,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 267.8) internal successors, (1339), 5 states have internal predecessors, (1339), 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 07:51:08,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:51:08,261 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:51:08,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 07:51:08,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:51:08,466 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [t2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, t1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-04 07:51:08,466 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:51:08,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1576955480, now seen corresponding path program 2 times [2023-08-04 07:51:08,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:51:08,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076755791] [2023-08-04 07:51:08,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:51:08,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:51:08,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:51:09,197 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 07:51:09,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:51:09,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076755791] [2023-08-04 07:51:09,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076755791] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:51:09,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703274314] [2023-08-04 07:51:09,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 07:51:09,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:51:09,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:51:09,199 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:51:09,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 07:51:09,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 07:51:09,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 07:51:09,295 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 59 conjunts are in the unsatisfiable core [2023-08-04 07:51:09,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:51:09,310 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-04 07:51:09,310 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-04 07:51:09,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 07:51:09,318 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-04 07:51:09,325 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 22 [2023-08-04 07:51:09,358 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2023-08-04 07:51:09,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 07:51:09,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 07:51:09,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 07:51:09,447 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 40 [2023-08-04 07:51:09,501 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2023-08-04 07:51:09,587 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2023-08-04 07:51:09,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 07:51:09,620 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2023-08-04 07:51:09,649 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2023-08-04 07:51:09,700 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 07:51:09,700 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:51:09,765 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_382 (Array Int Int)) (v_ArrVal_381 (Array Int Int))) (not (let ((.cse0 (select (store (store |c_#memory_int| |c_~#stored_elements~0.base| v_ArrVal_381) |c_ULTIMATE.start_main_~#id1~0#1.base| v_ArrVal_382) |c_~#queue~0.base|))) (= (select .cse0 (+ 3200 |c_~#queue~0.offset|)) (select .cse0 (+ |c_~#queue~0.offset| 3204)))))) is different from false [2023-08-04 07:51:10,255 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 07:51:10,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703274314] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:51:10,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:51:10,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 29 [2023-08-04 07:51:10,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643768863] [2023-08-04 07:51:10,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:51:10,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-04 07:51:10,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:51:10,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-04 07:51:10,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=660, Unknown=50, NotChecked=54, Total=870 [2023-08-04 07:51:10,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 530 [2023-08-04 07:51:10,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 29 transitions, 121 flow. Second operand has 30 states, 30 states have (on average 190.6) internal successors, (5718), 30 states have internal predecessors, (5718), 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 07:51:10,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:51:10,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 530 [2023-08-04 07:51:10,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:51:12,008 INFO L124 PetriNetUnfolderBase]: 11/48 cut-off events. [2023-08-04 07:51:12,008 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2023-08-04 07:51:12,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153 conditions, 48 events. 11/48 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 85 event pairs, 0 based on Foata normal form. 3/51 useless extension candidates. Maximal degree in co-relation 144. Up to 12 conditions per place. [2023-08-04 07:51:12,008 INFO L140 encePairwiseOnDemand]: 519/530 looper letters, 0 selfloop transitions, 0 changer transitions 39/39 dead transitions. [2023-08-04 07:51:12,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 39 transitions, 230 flow [2023-08-04 07:51:12,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-04 07:51:12,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-04 07:51:12,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4010 transitions. [2023-08-04 07:51:12,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36028751123090746 [2023-08-04 07:51:12,028 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4010 transitions. [2023-08-04 07:51:12,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4010 transitions. [2023-08-04 07:51:12,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:51:12,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4010 transitions. [2023-08-04 07:51:12,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 190.95238095238096) internal successors, (4010), 21 states have internal predecessors, (4010), 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 07:51:12,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 530.0) internal successors, (11660), 22 states have internal predecessors, (11660), 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 07:51:12,046 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 530.0) internal successors, (11660), 22 states have internal predecessors, (11660), 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 07:51:12,046 INFO L175 Difference]: Start difference. First operand has 54 places, 29 transitions, 121 flow. Second operand 21 states and 4010 transitions. [2023-08-04 07:51:12,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 39 transitions, 230 flow [2023-08-04 07:51:12,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 39 transitions, 214 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 07:51:12,047 INFO L231 Difference]: Finished difference. Result has 52 places, 0 transitions, 0 flow [2023-08-04 07:51:12,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=530, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=0, PETRI_PLACES=52, PETRI_TRANSITIONS=0} [2023-08-04 07:51:12,047 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -19 predicate places. [2023-08-04 07:51:12,047 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 0 transitions, 0 flow [2023-08-04 07:51:12,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 190.6) internal successors, (5718), 30 states have internal predecessors, (5718), 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 07:51:12,050 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 5 remaining) [2023-08-04 07:51:12,051 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-08-04 07:51:12,051 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-08-04 07:51:12,051 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-08-04 07:51:12,051 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-08-04 07:51:12,074 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-04 07:51:12,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:51:12,256 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:51:12,258 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-04 07:51:12,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 270 places, 288 transitions, 598 flow [2023-08-04 07:51:12,291 INFO L124 PetriNetUnfolderBase]: 42/448 cut-off events. [2023-08-04 07:51:12,291 INFO L125 PetriNetUnfolderBase]: For 8/12 co-relation queries the response was YES. [2023-08-04 07:51:12,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 468 conditions, 448 events. 42/448 cut-off events. For 8/12 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1543 event pairs, 0 based on Foata normal form. 0/394 useless extension candidates. Maximal degree in co-relation 252. Up to 8 conditions per place. [2023-08-04 07:51:12,292 INFO L82 GeneralOperation]: Start removeDead. Operand has 270 places, 288 transitions, 598 flow [2023-08-04 07:51:12,293 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 269 places, 287 transitions, 596 flow [2023-08-04 07:51:12,293 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:51:12,293 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 269 places, 287 transitions, 596 flow [2023-08-04 07:51:12,294 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 269 places, 287 transitions, 596 flow [2023-08-04 07:51:12,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 269 places, 287 transitions, 596 flow [2023-08-04 07:51:12,320 INFO L124 PetriNetUnfolderBase]: 42/447 cut-off events. [2023-08-04 07:51:12,320 INFO L125 PetriNetUnfolderBase]: For 8/12 co-relation queries the response was YES. [2023-08-04 07:51:12,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 467 conditions, 447 events. 42/447 cut-off events. For 8/12 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1539 event pairs, 0 based on Foata normal form. 0/394 useless extension candidates. Maximal degree in co-relation 252. Up to 8 conditions per place. [2023-08-04 07:51:12,329 INFO L119 LiptonReduction]: Number of co-enabled transitions 29746 [2023-08-04 07:51:19,523 INFO L134 LiptonReduction]: Checked pairs total: 64817 [2023-08-04 07:51:19,524 INFO L136 LiptonReduction]: Total number of compositions: 238 [2023-08-04 07:51:19,525 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 07:51:19,525 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;@400b33e0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:51:19,525 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 07:51:19,527 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:51:19,527 INFO L124 PetriNetUnfolderBase]: 0/24 cut-off events. [2023-08-04 07:51:19,527 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:51:19,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:51:19,527 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 07:51:19,528 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 07:51:19,528 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:51:19,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1528301862, now seen corresponding path program 1 times [2023-08-04 07:51:19,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:51:19,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798622692] [2023-08-04 07:51:19,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:51:19,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:51:19,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:51:19,535 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 07:51:19,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:51:19,550 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 07:51:19,550 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 07:51:19,550 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 07:51:19,551 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 07:51:19,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-04 07:51:19,551 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 07:51:19,551 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-04 07:51:19,552 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 07:51:19,552 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 07:51:19,591 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 07:51:19,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 435 places, 466 transitions, 980 flow [2023-08-04 07:51:19,751 INFO L124 PetriNetUnfolderBase]: 149/1208 cut-off events. [2023-08-04 07:51:19,751 INFO L125 PetriNetUnfolderBase]: For 72/98 co-relation queries the response was YES. [2023-08-04 07:51:19,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1305 conditions, 1208 events. 149/1208 cut-off events. For 72/98 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 7295 event pairs, 1 based on Foata normal form. 0/1051 useless extension candidates. Maximal degree in co-relation 784. Up to 32 conditions per place. [2023-08-04 07:51:19,767 INFO L82 GeneralOperation]: Start removeDead. Operand has 435 places, 466 transitions, 980 flow [2023-08-04 07:51:19,775 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 435 places, 466 transitions, 980 flow [2023-08-04 07:51:19,775 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:51:19,775 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 435 places, 466 transitions, 980 flow [2023-08-04 07:51:19,775 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 435 places, 466 transitions, 980 flow [2023-08-04 07:51:19,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 435 places, 466 transitions, 980 flow [2023-08-04 07:51:19,929 INFO L124 PetriNetUnfolderBase]: 149/1208 cut-off events. [2023-08-04 07:51:19,929 INFO L125 PetriNetUnfolderBase]: For 72/98 co-relation queries the response was YES. [2023-08-04 07:51:19,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1305 conditions, 1208 events. 149/1208 cut-off events. For 72/98 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 7295 event pairs, 1 based on Foata normal form. 0/1051 useless extension candidates. Maximal degree in co-relation 784. Up to 32 conditions per place. [2023-08-04 07:51:20,001 INFO L119 LiptonReduction]: Number of co-enabled transitions 122216 [2023-08-04 07:51:28,242 INFO L134 LiptonReduction]: Checked pairs total: 271945 [2023-08-04 07:51:28,242 INFO L136 LiptonReduction]: Total number of compositions: 381 [2023-08-04 07:51:28,257 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:51:28,257 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;@400b33e0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:51:28,257 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-04 07:51:28,257 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:51:28,258 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-04 07:51:28,258 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:51:28,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:51:28,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-04 07:51:28,258 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION, t2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-08-04 07:51:28,258 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:51:28,258 INFO L85 PathProgramCache]: Analyzing trace with hash 2385, now seen corresponding path program 1 times [2023-08-04 07:51:28,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:51:28,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743359250] [2023-08-04 07:51:28,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:51:28,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:51:28,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:51:28,261 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 07:51:28,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:51:28,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743359250] [2023-08-04 07:51:28,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743359250] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:51:28,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:51:28,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-04 07:51:28,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670434513] [2023-08-04 07:51:28,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:51:28,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-04 07:51:28,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:51:28,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-04 07:51:28,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-04 07:51:28,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 435 out of 847 [2023-08-04 07:51:28,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 147 transitions, 342 flow. Second operand has 2 states, 2 states have (on average 435.5) internal successors, (871), 2 states have internal predecessors, (871), 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 07:51:28,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:51:28,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 435 of 847 [2023-08-04 07:51:28,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand