/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe018_rmo.oepc_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 00:43:33,124 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 00:43:33,198 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 00:43:33,203 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 00:43:33,204 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 00:43:33,204 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 00:43:33,204 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 00:43:33,233 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 00:43:33,234 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 00:43:33,237 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 00:43:33,238 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 00:43:33,238 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 00:43:33,239 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 00:43:33,240 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 00:43:33,240 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 00:43:33,240 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 00:43:33,240 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 00:43:33,241 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 00:43:33,241 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 00:43:33,241 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 00:43:33,241 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 00:43:33,242 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 00:43:33,242 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 00:43:33,242 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 00:43:33,242 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 00:43:33,242 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 00:43:33,242 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 00:43:33,243 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 00:43:33,243 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 00:43:33,243 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 00:43:33,244 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 00:43:33,245 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 00:43:33,245 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 00:43:33,245 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 00:43:33,245 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 00:43:33,245 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 00:43:33,245 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 00:43:33,245 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 00:43:33,246 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 00:43:33,246 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 00:43:33,246 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 00:43:33,246 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 00:43:33,439 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 00:43:33,456 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 00:43:33,458 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 00:43:33,459 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 00:43:33,460 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 00:43:33,461 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe018_rmo.oepc_bound2.i [2023-08-04 00:43:34,593 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 00:43:34,794 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 00:43:34,795 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe018_rmo.oepc_bound2.i [2023-08-04 00:43:34,820 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e7e823b1/072765ec16944764b303fe398bca27c6/FLAG0bc30bdb4 [2023-08-04 00:43:34,833 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e7e823b1/072765ec16944764b303fe398bca27c6 [2023-08-04 00:43:34,835 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 00:43:34,837 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 00:43:34,838 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 00:43:34,838 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 00:43:34,841 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 00:43:34,841 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 12:43:34" (1/1) ... [2023-08-04 00:43:34,842 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@641f75c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:43:34, skipping insertion in model container [2023-08-04 00:43:34,842 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 12:43:34" (1/1) ... [2023-08-04 00:43:34,882 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 00:43:35,013 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe018_rmo.oepc_bound2.i[993,1006] [2023-08-04 00:43:35,232 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 00:43:35,243 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 00:43:35,255 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe018_rmo.oepc_bound2.i[993,1006] [2023-08-04 00:43:35,275 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-04 00:43:35,276 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-04 00:43:35,312 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 00:43:35,352 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 00:43:35,352 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 00:43:35,358 INFO L206 MainTranslator]: Completed translation [2023-08-04 00:43:35,359 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:43:35 WrapperNode [2023-08-04 00:43:35,359 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 00:43:35,360 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 00:43:35,360 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 00:43:35,361 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 00:43:35,366 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:43:35" (1/1) ... [2023-08-04 00:43:35,383 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:43:35" (1/1) ... [2023-08-04 00:43:35,410 INFO L138 Inliner]: procedures = 176, calls = 65, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 161 [2023-08-04 00:43:35,410 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 00:43:35,411 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 00:43:35,411 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 00:43:35,411 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 00:43:35,426 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:43:35" (1/1) ... [2023-08-04 00:43:35,426 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:43:35" (1/1) ... [2023-08-04 00:43:35,430 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:43:35" (1/1) ... [2023-08-04 00:43:35,430 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:43:35" (1/1) ... [2023-08-04 00:43:35,447 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:43:35" (1/1) ... [2023-08-04 00:43:35,451 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:43:35" (1/1) ... [2023-08-04 00:43:35,453 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:43:35" (1/1) ... [2023-08-04 00:43:35,455 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:43:35" (1/1) ... [2023-08-04 00:43:35,459 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 00:43:35,460 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 00:43:35,460 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 00:43:35,460 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 00:43:35,462 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:43:35" (1/1) ... [2023-08-04 00:43:35,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 00:43:35,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:43:35,501 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 00:43:35,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 00:43:35,539 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 00:43:35,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 00:43:35,539 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 00:43:35,540 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 00:43:35,540 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 00:43:35,541 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 00:43:35,541 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 00:43:35,542 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 00:43:35,542 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 00:43:35,542 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 00:43:35,542 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-04 00:43:35,542 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-04 00:43:35,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 00:43:35,543 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 00:43:35,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 00:43:35,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 00:43:35,545 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 00:43:35,703 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 00:43:35,705 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 00:43:35,969 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 00:43:36,162 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 00:43:36,163 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-04 00:43:36,165 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 12:43:36 BoogieIcfgContainer [2023-08-04 00:43:36,165 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 00:43:36,168 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 00:43:36,168 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 00:43:36,171 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 00:43:36,172 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 12:43:34" (1/3) ... [2023-08-04 00:43:36,172 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@443ffa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 12:43:36, skipping insertion in model container [2023-08-04 00:43:36,172 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:43:35" (2/3) ... [2023-08-04 00:43:36,173 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@443ffa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 12:43:36, skipping insertion in model container [2023-08-04 00:43:36,173 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 12:43:36" (3/3) ... [2023-08-04 00:43:36,174 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe018_rmo.oepc_bound2.i [2023-08-04 00:43:36,182 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 00:43:36,189 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 00:43:36,189 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 00:43:36,189 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 00:43:36,241 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 00:43:36,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 146 places, 144 transitions, 303 flow [2023-08-04 00:43:36,415 INFO L124 PetriNetUnfolderBase]: 30/461 cut-off events. [2023-08-04 00:43:36,416 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:43:36,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 486 conditions, 461 events. 30/461 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1926 event pairs, 0 based on Foata normal form. 0/409 useless extension candidates. Maximal degree in co-relation 282. Up to 16 conditions per place. [2023-08-04 00:43:36,423 INFO L82 GeneralOperation]: Start removeDead. Operand has 146 places, 144 transitions, 303 flow [2023-08-04 00:43:36,427 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 120 places, 115 transitions, 245 flow [2023-08-04 00:43:36,430 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:43:36,439 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 120 places, 115 transitions, 245 flow [2023-08-04 00:43:36,441 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 120 places, 115 transitions, 245 flow [2023-08-04 00:43:36,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 120 places, 115 transitions, 245 flow [2023-08-04 00:43:36,507 INFO L124 PetriNetUnfolderBase]: 6/229 cut-off events. [2023-08-04 00:43:36,508 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:43:36,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254 conditions, 229 events. 6/229 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 602 event pairs, 0 based on Foata normal form. 0/217 useless extension candidates. Maximal degree in co-relation 166. Up to 8 conditions per place. [2023-08-04 00:43:36,512 INFO L119 LiptonReduction]: Number of co-enabled transitions 1084 [2023-08-04 00:43:41,304 INFO L134 LiptonReduction]: Checked pairs total: 2468 [2023-08-04 00:43:41,304 INFO L136 LiptonReduction]: Total number of compositions: 97 [2023-08-04 00:43:41,316 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 00:43:41,322 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;@1a83f805, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:43:41,322 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 00:43:41,327 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:43:41,327 INFO L124 PetriNetUnfolderBase]: 0/21 cut-off events. [2023-08-04 00:43:41,327 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:43:41,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:43:41,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 00:43:41,329 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:43:41,333 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:43:41,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1588681773, now seen corresponding path program 1 times [2023-08-04 00:43:41,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:43:41,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030642511] [2023-08-04 00:43:41,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:43:41,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:43:41,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:43:41,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 00:43:41,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:43:41,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030642511] [2023-08-04 00:43:41,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030642511] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:43:41,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:43:41,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:43:41,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369844007] [2023-08-04 00:43:41,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:43:41,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:43:41,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:43:41,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:43:41,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:43:41,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 241 [2023-08-04 00:43:41,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 61 flow. Second operand has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:43:41,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:43:41,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 241 [2023-08-04 00:43:41,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:43:41,771 INFO L124 PetriNetUnfolderBase]: 200/382 cut-off events. [2023-08-04 00:43:41,771 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-04 00:43:41,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 794 conditions, 382 events. 200/382 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1644 event pairs, 150 based on Foata normal form. 0/358 useless extension candidates. Maximal degree in co-relation 777. Up to 348 conditions per place. [2023-08-04 00:43:41,776 INFO L140 encePairwiseOnDemand]: 238/241 looper letters, 19 selfloop transitions, 2 changer transitions 0/26 dead transitions. [2023-08-04 00:43:41,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 26 transitions, 109 flow [2023-08-04 00:43:41,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:43:41,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:43:41,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 403 transitions. [2023-08-04 00:43:41,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5573997233748271 [2023-08-04 00:43:41,791 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 403 transitions. [2023-08-04 00:43:41,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 403 transitions. [2023-08-04 00:43:41,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:43:41,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 403 transitions. [2023-08-04 00:43:41,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:43:41,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 241.0) internal successors, (964), 4 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:43:41,804 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 241.0) internal successors, (964), 4 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:43:41,806 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 61 flow. Second operand 3 states and 403 transitions. [2023-08-04 00:43:41,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 26 transitions, 109 flow [2023-08-04 00:43:41,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 26 transitions, 109 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 00:43:41,809 INFO L231 Difference]: Finished difference. Result has 33 places, 23 transitions, 69 flow [2023-08-04 00:43:41,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=33, PETRI_TRANSITIONS=23} [2023-08-04 00:43:41,815 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2023-08-04 00:43:41,815 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 23 transitions, 69 flow [2023-08-04 00:43:41,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:43:41,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:43:41,816 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 00:43:41,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 00:43:41,816 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:43:41,816 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:43:41,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1597634261, now seen corresponding path program 1 times [2023-08-04 00:43:41,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:43:41,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540861304] [2023-08-04 00:43:41,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:43:41,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:43:41,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 00:43:41,840 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 00:43:41,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 00:43:41,880 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 00:43:41,881 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 00:43:41,882 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 00:43:41,884 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 00:43:41,884 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 00:43:41,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 00:43:41,885 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 00:43:41,886 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-04 00:43:41,887 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 00:43:41,887 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 00:43:41,920 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 00:43:41,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 165 transitions, 366 flow [2023-08-04 00:43:42,112 INFO L124 PetriNetUnfolderBase]: 93/1380 cut-off events. [2023-08-04 00:43:42,113 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 00:43:42,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1478 conditions, 1380 events. 93/1380 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9300 event pairs, 0 based on Foata normal form. 0/1221 useless extension candidates. Maximal degree in co-relation 1003. Up to 54 conditions per place. [2023-08-04 00:43:42,121 INFO L82 GeneralOperation]: Start removeDead. Operand has 173 places, 165 transitions, 366 flow [2023-08-04 00:43:42,124 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 147 places, 136 transitions, 308 flow [2023-08-04 00:43:42,124 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:43:42,124 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 147 places, 136 transitions, 308 flow [2023-08-04 00:43:42,125 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 147 places, 136 transitions, 308 flow [2023-08-04 00:43:42,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 147 places, 136 transitions, 308 flow [2023-08-04 00:43:42,187 INFO L124 PetriNetUnfolderBase]: 12/597 cut-off events. [2023-08-04 00:43:42,187 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 00:43:42,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 695 conditions, 597 events. 12/597 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2906 event pairs, 0 based on Foata normal form. 0/573 useless extension candidates. Maximal degree in co-relation 481. Up to 27 conditions per place. [2023-08-04 00:43:42,197 INFO L119 LiptonReduction]: Number of co-enabled transitions 2920 [2023-08-04 00:43:47,049 INFO L134 LiptonReduction]: Checked pairs total: 8176 [2023-08-04 00:43:47,049 INFO L136 LiptonReduction]: Total number of compositions: 103 [2023-08-04 00:43:47,051 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 00:43:47,052 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;@1a83f805, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:43:47,053 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 00:43:47,059 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:43:47,060 INFO L124 PetriNetUnfolderBase]: 0/62 cut-off events. [2023-08-04 00:43:47,060 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-04 00:43:47,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:43:47,060 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 00:43:47,060 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:43:47,061 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:43:47,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1025623273, now seen corresponding path program 1 times [2023-08-04 00:43:47,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:43:47,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548616338] [2023-08-04 00:43:47,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:43:47,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:43:47,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:43:47,122 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 00:43:47,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:43:47,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548616338] [2023-08-04 00:43:47,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548616338] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:43:47,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:43:47,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:43:47,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042893427] [2023-08-04 00:43:47,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:43:47,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:43:47,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:43:47,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:43:47,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:43:47,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 268 [2023-08-04 00:43:47,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 38 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:43:47,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:43:47,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 268 [2023-08-04 00:43:47,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:43:51,159 INFO L124 PetriNetUnfolderBase]: 21408/29770 cut-off events. [2023-08-04 00:43:51,160 INFO L125 PetriNetUnfolderBase]: For 2280/2280 co-relation queries the response was YES. [2023-08-04 00:43:51,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60985 conditions, 29770 events. 21408/29770 cut-off events. For 2280/2280 co-relation queries the response was YES. Maximal size of possible extension queue 1026. Compared 183704 event pairs, 16818 based on Foata normal form. 0/29485 useless extension candidates. Maximal degree in co-relation 17262. Up to 28294 conditions per place. [2023-08-04 00:43:51,379 INFO L140 encePairwiseOnDemand]: 265/268 looper letters, 30 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2023-08-04 00:43:51,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 42 transitions, 184 flow [2023-08-04 00:43:51,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:43:51,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:43:51,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 462 transitions. [2023-08-04 00:43:51,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5746268656716418 [2023-08-04 00:43:51,385 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 462 transitions. [2023-08-04 00:43:51,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 462 transitions. [2023-08-04 00:43:51,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:43:51,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 462 transitions. [2023-08-04 00:43:51,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:43:51,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:43:51,391 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:43:51,392 INFO L175 Difference]: Start difference. First operand has 51 places, 38 transitions, 112 flow. Second operand 3 states and 462 transitions. [2023-08-04 00:43:51,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 42 transitions, 184 flow [2023-08-04 00:43:51,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 42 transitions, 178 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-04 00:43:51,400 INFO L231 Difference]: Finished difference. Result has 54 places, 39 transitions, 118 flow [2023-08-04 00:43:51,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=54, PETRI_TRANSITIONS=39} [2023-08-04 00:43:51,400 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 3 predicate places. [2023-08-04 00:43:51,401 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 39 transitions, 118 flow [2023-08-04 00:43:51,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:43:51,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:43:51,401 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 00:43:51,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 00:43:51,402 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:43:51,402 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:43:51,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1669538834, now seen corresponding path program 1 times [2023-08-04 00:43:51,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:43:51,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130478723] [2023-08-04 00:43:51,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:43:51,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:43:51,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:43:51,536 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:43:51,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:43:51,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130478723] [2023-08-04 00:43:51,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130478723] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:43:51,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501373102] [2023-08-04 00:43:51,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:43:51,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:43:51,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:43:51,540 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:43:51,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 00:43:51,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:43:51,657 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 00:43:51,659 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:43:51,703 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:43:51,703 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:43:51,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501373102] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:43:51,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:43:51,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 00:43:51,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376117652] [2023-08-04 00:43:51,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:43:51,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:43:51,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:43:51,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:43:51,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 00:43:51,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 268 [2023-08-04 00:43:51,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 39 transitions, 118 flow. Second operand has 5 states, 5 states have (on average 143.6) internal successors, (718), 5 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:43:51,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:43:51,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 268 [2023-08-04 00:43:51,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:43:54,982 INFO L124 PetriNetUnfolderBase]: 21396/29725 cut-off events. [2023-08-04 00:43:54,982 INFO L125 PetriNetUnfolderBase]: For 1947/1947 co-relation queries the response was YES. [2023-08-04 00:43:55,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60655 conditions, 29725 events. 21396/29725 cut-off events. For 1947/1947 co-relation queries the response was YES. Maximal size of possible extension queue 1026. Compared 182143 event pairs, 13380 based on Foata normal form. 9/29482 useless extension candidates. Maximal degree in co-relation 21735. Up to 28247 conditions per place. [2023-08-04 00:43:55,153 INFO L140 encePairwiseOnDemand]: 264/268 looper letters, 33 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2023-08-04 00:43:55,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 46 transitions, 206 flow [2023-08-04 00:43:55,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 00:43:55,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 00:43:55,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 748 transitions. [2023-08-04 00:43:55,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5582089552238806 [2023-08-04 00:43:55,156 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 748 transitions. [2023-08-04 00:43:55,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 748 transitions. [2023-08-04 00:43:55,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:43:55,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 748 transitions. [2023-08-04 00:43:55,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 149.6) internal successors, (748), 5 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:43:55,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 268.0) internal successors, (1608), 6 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:43:55,161 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 268.0) internal successors, (1608), 6 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:43:55,161 INFO L175 Difference]: Start difference. First operand has 54 places, 39 transitions, 118 flow. Second operand 5 states and 748 transitions. [2023-08-04 00:43:55,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 46 transitions, 206 flow [2023-08-04 00:43:55,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 46 transitions, 203 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 00:43:55,164 INFO L231 Difference]: Finished difference. Result has 57 places, 39 transitions, 132 flow [2023-08-04 00:43:55,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=132, PETRI_PLACES=57, PETRI_TRANSITIONS=39} [2023-08-04 00:43:55,165 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 6 predicate places. [2023-08-04 00:43:55,166 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 39 transitions, 132 flow [2023-08-04 00:43:55,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 143.6) internal successors, (718), 5 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:43:55,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:43:55,166 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:43:55,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 00:43:55,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:43:55,372 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:43:55,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:43:55,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1202834464, now seen corresponding path program 1 times [2023-08-04 00:43:55,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:43:55,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121852525] [2023-08-04 00:43:55,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:43:55,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:43:55,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:43:55,460 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 00:43:55,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:43:55,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121852525] [2023-08-04 00:43:55,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121852525] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:43:55,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916795129] [2023-08-04 00:43:55,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:43:55,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:43:55,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:43:55,463 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:43:55,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 00:43:55,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:43:55,578 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 00:43:55,579 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:43:55,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:43:55,586 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:43:55,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916795129] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:43:55,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:43:55,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 00:43:55,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841371439] [2023-08-04 00:43:55,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:43:55,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:43:55,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:43:55,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:43:55,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:43:55,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 268 [2023-08-04 00:43:55,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 39 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:43:55,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:43:55,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 268 [2023-08-04 00:43:55,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:43:58,583 INFO L124 PetriNetUnfolderBase]: 20354/29072 cut-off events. [2023-08-04 00:43:58,584 INFO L125 PetriNetUnfolderBase]: For 1798/1798 co-relation queries the response was YES. [2023-08-04 00:43:58,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58519 conditions, 29072 events. 20354/29072 cut-off events. For 1798/1798 co-relation queries the response was YES. Maximal size of possible extension queue 1088. Compared 186675 event pairs, 16084 based on Foata normal form. 0/28772 useless extension candidates. Maximal degree in co-relation 16660. Up to 26614 conditions per place. [2023-08-04 00:43:58,727 INFO L140 encePairwiseOnDemand]: 265/268 looper letters, 35 selfloop transitions, 3 changer transitions 0/47 dead transitions. [2023-08-04 00:43:58,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 47 transitions, 224 flow [2023-08-04 00:43:58,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:43:58,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:43:58,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 466 transitions. [2023-08-04 00:43:58,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5796019900497512 [2023-08-04 00:43:58,733 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 466 transitions. [2023-08-04 00:43:58,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 466 transitions. [2023-08-04 00:43:58,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:43:58,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 466 transitions. [2023-08-04 00:43:58,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.33333333333334) internal successors, (466), 3 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:43:58,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:43:58,742 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:43:58,742 INFO L175 Difference]: Start difference. First operand has 57 places, 39 transitions, 132 flow. Second operand 3 states and 466 transitions. [2023-08-04 00:43:58,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 47 transitions, 224 flow [2023-08-04 00:43:58,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 47 transitions, 217 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-04 00:43:58,746 INFO L231 Difference]: Finished difference. Result has 58 places, 40 transitions, 140 flow [2023-08-04 00:43:58,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=58, PETRI_TRANSITIONS=40} [2023-08-04 00:43:58,747 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 7 predicate places. [2023-08-04 00:43:58,747 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 40 transitions, 140 flow [2023-08-04 00:43:58,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:43:58,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:43:58,748 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:43:58,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 00:43:58,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:43:58,953 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:43:58,954 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:43:58,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1406319762, now seen corresponding path program 1 times [2023-08-04 00:43:58,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:43:58,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115292560] [2023-08-04 00:43:58,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:43:58,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:43:58,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:43:59,016 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 00:43:59,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:43:59,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115292560] [2023-08-04 00:43:59,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115292560] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:43:59,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021468309] [2023-08-04 00:43:59,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:43:59,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:43:59,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:43:59,019 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:43:59,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 00:43:59,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:43:59,136 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:43:59,138 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:43:59,152 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 00:43:59,153 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:43:59,175 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 00:43:59,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021468309] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:43:59,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:43:59,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 00:43:59,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657223103] [2023-08-04 00:43:59,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:43:59,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:43:59,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:43:59,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:43:59,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:43:59,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 268 [2023-08-04 00:43:59,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 40 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 144.6) internal successors, (723), 5 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:43:59,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:43:59,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 268 [2023-08-04 00:43:59,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:44:01,497 INFO L124 PetriNetUnfolderBase]: 16066/22664 cut-off events. [2023-08-04 00:44:01,497 INFO L125 PetriNetUnfolderBase]: For 1557/1557 co-relation queries the response was YES. [2023-08-04 00:44:01,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45813 conditions, 22664 events. 16066/22664 cut-off events. For 1557/1557 co-relation queries the response was YES. Maximal size of possible extension queue 919. Compared 138463 event pairs, 9684 based on Foata normal form. 3/22523 useless extension candidates. Maximal degree in co-relation 16312. Up to 20836 conditions per place. [2023-08-04 00:44:01,602 INFO L140 encePairwiseOnDemand]: 265/268 looper letters, 34 selfloop transitions, 3 changer transitions 0/46 dead transitions. [2023-08-04 00:44:01,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 46 transitions, 221 flow [2023-08-04 00:44:01,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:44:01,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:44:01,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 605 transitions. [2023-08-04 00:44:01,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5643656716417911 [2023-08-04 00:44:01,604 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 605 transitions. [2023-08-04 00:44:01,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 605 transitions. [2023-08-04 00:44:01,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:44:01,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 605 transitions. [2023-08-04 00:44:01,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 151.25) internal successors, (605), 4 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 00:44:01,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 268.0) internal successors, (1340), 5 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:44:01,609 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 268.0) internal successors, (1340), 5 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:44:01,609 INFO L175 Difference]: Start difference. First operand has 58 places, 40 transitions, 140 flow. Second operand 4 states and 605 transitions. [2023-08-04 00:44:01,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 46 transitions, 221 flow [2023-08-04 00:44:01,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 46 transitions, 219 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:44:01,611 INFO L231 Difference]: Finished difference. Result has 60 places, 39 transitions, 135 flow [2023-08-04 00:44:01,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=135, PETRI_PLACES=60, PETRI_TRANSITIONS=39} [2023-08-04 00:44:01,612 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 9 predicate places. [2023-08-04 00:44:01,612 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 39 transitions, 135 flow [2023-08-04 00:44:01,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 144.6) internal successors, (723), 5 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:44:01,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:44:01,613 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:44:01,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 00:44:01,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:44:01,818 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:44:01,819 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:44:01,819 INFO L85 PathProgramCache]: Analyzing trace with hash -271571260, now seen corresponding path program 1 times [2023-08-04 00:44:01,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:44:01,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194534868] [2023-08-04 00:44:01,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:44:01,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:44:01,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:44:01,925 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:44:01,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:44:01,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194534868] [2023-08-04 00:44:01,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194534868] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:44:01,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960315514] [2023-08-04 00:44:01,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:44:01,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:44:01,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:44:01,931 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:44:01,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 00:44:02,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:44:02,050 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 00:44:02,052 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:44:02,074 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:44:02,074 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:44:02,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960315514] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:44:02,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:44:02,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 00:44:02,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796304037] [2023-08-04 00:44:02,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:44:02,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:44:02,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:44:02,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:44:02,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 00:44:02,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 268 [2023-08-04 00:44:02,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 39 transitions, 135 flow. Second operand has 5 states, 5 states have (on average 144.6) internal successors, (723), 5 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:44:02,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:44:02,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 268 [2023-08-04 00:44:02,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:44:04,492 INFO L124 PetriNetUnfolderBase]: 15850/22453 cut-off events. [2023-08-04 00:44:04,492 INFO L125 PetriNetUnfolderBase]: For 1330/1330 co-relation queries the response was YES. [2023-08-04 00:44:04,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45264 conditions, 22453 events. 15850/22453 cut-off events. For 1330/1330 co-relation queries the response was YES. Maximal size of possible extension queue 920. Compared 138146 event pairs, 4234 based on Foata normal form. 81/22417 useless extension candidates. Maximal degree in co-relation 16109. Up to 20007 conditions per place. [2023-08-04 00:44:04,607 INFO L140 encePairwiseOnDemand]: 264/268 looper letters, 46 selfloop transitions, 4 changer transitions 0/58 dead transitions. [2023-08-04 00:44:04,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 58 transitions, 273 flow [2023-08-04 00:44:04,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 00:44:04,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 00:44:04,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 760 transitions. [2023-08-04 00:44:04,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5671641791044776 [2023-08-04 00:44:04,610 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 760 transitions. [2023-08-04 00:44:04,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 760 transitions. [2023-08-04 00:44:04,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:44:04,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 760 transitions. [2023-08-04 00:44:04,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 152.0) internal successors, (760), 5 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:44:04,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 268.0) internal successors, (1608), 6 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:44:04,617 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 268.0) internal successors, (1608), 6 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:44:04,617 INFO L175 Difference]: Start difference. First operand has 60 places, 39 transitions, 135 flow. Second operand 5 states and 760 transitions. [2023-08-04 00:44:04,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 58 transitions, 273 flow [2023-08-04 00:44:04,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 58 transitions, 266 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 00:44:04,621 INFO L231 Difference]: Finished difference. Result has 61 places, 39 transitions, 145 flow [2023-08-04 00:44:04,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=145, PETRI_PLACES=61, PETRI_TRANSITIONS=39} [2023-08-04 00:44:04,622 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 10 predicate places. [2023-08-04 00:44:04,622 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 39 transitions, 145 flow [2023-08-04 00:44:04,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 144.6) internal successors, (723), 5 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:44:04,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:44:04,623 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:44:04,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 00:44:04,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:44:04,828 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:44:04,829 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:44:04,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1460184509, now seen corresponding path program 1 times [2023-08-04 00:44:04,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:44:04,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549422439] [2023-08-04 00:44:04,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:44:04,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:44:04,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:44:04,892 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 00:44:04,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:44:04,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549422439] [2023-08-04 00:44:04,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549422439] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:44:04,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967722697] [2023-08-04 00:44:04,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:44:04,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:44:04,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:44:04,897 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:44:04,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 00:44:05,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:44:05,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:44:05,017 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:44:05,040 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 00:44:05,040 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:44:05,055 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 00:44:05,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967722697] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:44:05,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:44:05,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 00:44:05,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520587829] [2023-08-04 00:44:05,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:44:05,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:44:05,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:44:05,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:44:05,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:44:05,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 268 [2023-08-04 00:44:05,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 39 transitions, 145 flow. Second operand has 5 states, 5 states have (on average 145.4) internal successors, (727), 5 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:44:05,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:44:05,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 268 [2023-08-04 00:44:05,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:44:06,567 INFO L124 PetriNetUnfolderBase]: 12583/17620 cut-off events. [2023-08-04 00:44:06,568 INFO L125 PetriNetUnfolderBase]: For 1567/1567 co-relation queries the response was YES. [2023-08-04 00:44:06,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35874 conditions, 17620 events. 12583/17620 cut-off events. For 1567/1567 co-relation queries the response was YES. Maximal size of possible extension queue 815. Compared 102496 event pairs, 7717 based on Foata normal form. 27/17557 useless extension candidates. Maximal degree in co-relation 12734. Up to 15685 conditions per place. [2023-08-04 00:44:06,674 INFO L140 encePairwiseOnDemand]: 265/268 looper letters, 42 selfloop transitions, 3 changer transitions 0/53 dead transitions. [2023-08-04 00:44:06,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 53 transitions, 259 flow [2023-08-04 00:44:06,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:44:06,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:44:06,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 613 transitions. [2023-08-04 00:44:06,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5718283582089553 [2023-08-04 00:44:06,677 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 613 transitions. [2023-08-04 00:44:06,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 613 transitions. [2023-08-04 00:44:06,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:44:06,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 613 transitions. [2023-08-04 00:44:06,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 153.25) internal successors, (613), 4 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:44:06,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 268.0) internal successors, (1340), 5 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:44:06,681 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 268.0) internal successors, (1340), 5 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:44:06,681 INFO L175 Difference]: Start difference. First operand has 61 places, 39 transitions, 145 flow. Second operand 4 states and 613 transitions. [2023-08-04 00:44:06,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 53 transitions, 259 flow [2023-08-04 00:44:06,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 53 transitions, 254 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 00:44:06,683 INFO L231 Difference]: Finished difference. Result has 62 places, 38 transitions, 138 flow [2023-08-04 00:44:06,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=62, PETRI_TRANSITIONS=38} [2023-08-04 00:44:06,684 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 11 predicate places. [2023-08-04 00:44:06,684 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 38 transitions, 138 flow [2023-08-04 00:44:06,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 145.4) internal successors, (727), 5 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:44:06,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:44:06,685 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:44:06,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 00:44:06,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:44:06,890 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:44:06,890 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:44:06,890 INFO L85 PathProgramCache]: Analyzing trace with hash -394402799, now seen corresponding path program 1 times [2023-08-04 00:44:06,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:44:06,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525881554] [2023-08-04 00:44:06,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:44:06,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:44:06,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:44:06,954 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 00:44:06,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:44:06,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525881554] [2023-08-04 00:44:06,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525881554] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:44:06,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138079015] [2023-08-04 00:44:06,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:44:06,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:44:06,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:44:06,956 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:44:06,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 00:44:07,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:44:07,081 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 00:44:07,083 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:44:07,099 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 00:44:07,100 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:44:07,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138079015] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:44:07,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:44:07,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 00:44:07,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791032614] [2023-08-04 00:44:07,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:44:07,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 00:44:07,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:44:07,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 00:44:07,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:44:07,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 268 [2023-08-04 00:44:07,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 38 transitions, 138 flow. Second operand has 4 states, 4 states have (on average 146.75) internal successors, (587), 4 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:44:07,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:44:07,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 268 [2023-08-04 00:44:07,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:44:08,091 INFO L124 PetriNetUnfolderBase]: 7183/10357 cut-off events. [2023-08-04 00:44:08,091 INFO L125 PetriNetUnfolderBase]: For 1279/1279 co-relation queries the response was YES. [2023-08-04 00:44:08,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21699 conditions, 10357 events. 7183/10357 cut-off events. For 1279/1279 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 57633 event pairs, 568 based on Foata normal form. 1296/11563 useless extension candidates. Maximal degree in co-relation 8618. Up to 7155 conditions per place. [2023-08-04 00:44:08,126 INFO L140 encePairwiseOnDemand]: 266/268 looper letters, 0 selfloop transitions, 0 changer transitions 56/56 dead transitions. [2023-08-04 00:44:08,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 56 transitions, 270 flow [2023-08-04 00:44:08,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:44:08,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:44:08,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 620 transitions. [2023-08-04 00:44:08,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5783582089552238 [2023-08-04 00:44:08,129 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 620 transitions. [2023-08-04 00:44:08,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 620 transitions. [2023-08-04 00:44:08,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:44:08,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 620 transitions. [2023-08-04 00:44:08,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:44:08,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 268.0) internal successors, (1340), 5 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:44:08,132 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 268.0) internal successors, (1340), 5 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:44:08,133 INFO L175 Difference]: Start difference. First operand has 62 places, 38 transitions, 138 flow. Second operand 4 states and 620 transitions. [2023-08-04 00:44:08,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 56 transitions, 270 flow [2023-08-04 00:44:08,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 56 transitions, 263 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 00:44:08,165 INFO L231 Difference]: Finished difference. Result has 60 places, 0 transitions, 0 flow [2023-08-04 00:44:08,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=60, PETRI_TRANSITIONS=0} [2023-08-04 00:44:08,166 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 9 predicate places. [2023-08-04 00:44:08,166 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 0 transitions, 0 flow [2023-08-04 00:44:08,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 146.75) internal successors, (587), 4 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:44:08,166 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 00:44:08,166 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 00:44:08,167 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 00:44:08,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 00:44:08,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:44:08,375 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:44:08,375 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (1/2) [2023-08-04 00:44:08,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 165 transitions, 366 flow [2023-08-04 00:44:08,488 INFO L124 PetriNetUnfolderBase]: 93/1380 cut-off events. [2023-08-04 00:44:08,488 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 00:44:08,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1478 conditions, 1380 events. 93/1380 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9300 event pairs, 0 based on Foata normal form. 0/1221 useless extension candidates. Maximal degree in co-relation 1003. Up to 54 conditions per place. [2023-08-04 00:44:08,490 INFO L82 GeneralOperation]: Start removeDead. Operand has 173 places, 165 transitions, 366 flow [2023-08-04 00:44:08,492 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 159 places, 150 transitions, 324 flow [2023-08-04 00:44:08,492 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:44:08,492 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 159 places, 150 transitions, 324 flow [2023-08-04 00:44:08,493 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 159 places, 150 transitions, 324 flow [2023-08-04 00:44:08,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 159 places, 150 transitions, 324 flow [2023-08-04 00:44:08,565 INFO L124 PetriNetUnfolderBase]: 66/1043 cut-off events. [2023-08-04 00:44:08,565 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-08-04 00:44:08,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1115 conditions, 1043 events. 66/1043 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 6407 event pairs, 0 based on Foata normal form. 0/938 useless extension candidates. Maximal degree in co-relation 775. Up to 54 conditions per place. [2023-08-04 00:44:08,577 INFO L119 LiptonReduction]: Number of co-enabled transitions 4004 [2023-08-04 00:44:13,695 INFO L134 LiptonReduction]: Checked pairs total: 12063 [2023-08-04 00:44:13,696 INFO L136 LiptonReduction]: Total number of compositions: 116 [2023-08-04 00:44:13,698 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 00:44:13,699 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;@1a83f805, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:44:13,699 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 00:44:13,702 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:44:13,702 INFO L124 PetriNetUnfolderBase]: 1/29 cut-off events. [2023-08-04 00:44:13,702 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 00:44:13,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:44:13,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:44:13,702 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:44:13,702 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:44:13,703 INFO L85 PathProgramCache]: Analyzing trace with hash 127695236, now seen corresponding path program 1 times [2023-08-04 00:44:13,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:44:13,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788478578] [2023-08-04 00:44:13,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:44:13,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:44:13,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:44:13,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:44:13,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:44:13,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788478578] [2023-08-04 00:44:13,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788478578] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:44:13,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:44:13,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:44:13,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470212354] [2023-08-04 00:44:13,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:44:13,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:44:13,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:44:13,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:44:13,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:44:13,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 281 [2023-08-04 00:44:13,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 42 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:44:13,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:44:13,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 281 [2023-08-04 00:44:13,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:44:25,130 INFO L124 PetriNetUnfolderBase]: 90780/122077 cut-off events. [2023-08-04 00:44:25,130 INFO L125 PetriNetUnfolderBase]: For 1965/1965 co-relation queries the response was YES. [2023-08-04 00:44:25,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 241738 conditions, 122077 events. 90780/122077 cut-off events. For 1965/1965 co-relation queries the response was YES. Maximal size of possible extension queue 3484. Compared 796205 event pairs, 73086 based on Foata normal form. 3276/117211 useless extension candidates. Maximal degree in co-relation 68777. Up to 117322 conditions per place. [2023-08-04 00:44:25,714 INFO L140 encePairwiseOnDemand]: 277/281 looper letters, 35 selfloop transitions, 2 changer transitions 1/45 dead transitions. [2023-08-04 00:44:25,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 45 transitions, 190 flow [2023-08-04 00:44:25,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:44:25,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:44:25,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 469 transitions. [2023-08-04 00:44:25,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5563463819691578 [2023-08-04 00:44:25,716 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 469 transitions. [2023-08-04 00:44:25,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 469 transitions. [2023-08-04 00:44:25,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:44:25,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 469 transitions. [2023-08-04 00:44:25,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:44:25,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:44:25,719 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:44:25,719 INFO L175 Difference]: Start difference. First operand has 54 places, 42 transitions, 108 flow. Second operand 3 states and 469 transitions. [2023-08-04 00:44:25,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 45 transitions, 190 flow [2023-08-04 00:44:25,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 45 transitions, 190 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 00:44:25,721 INFO L231 Difference]: Finished difference. Result has 57 places, 41 transitions, 116 flow [2023-08-04 00:44:25,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=57, PETRI_TRANSITIONS=41} [2023-08-04 00:44:25,722 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 3 predicate places. [2023-08-04 00:44:25,722 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 41 transitions, 116 flow [2023-08-04 00:44:25,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:44:25,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:44:25,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:44:25,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-04 00:44:25,722 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:44:25,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:44:25,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1638477284, now seen corresponding path program 1 times [2023-08-04 00:44:25,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:44:25,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92467085] [2023-08-04 00:44:25,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:44:25,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:44:25,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:44:25,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:44:25,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:44:25,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92467085] [2023-08-04 00:44:25,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92467085] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:44:25,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681140877] [2023-08-04 00:44:25,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:44:25,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:44:25,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:44:25,767 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:44:25,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 00:44:25,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:44:25,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 00:44:25,887 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:44:25,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 00:44:25,893 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:44:25,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681140877] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:44:25,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:44:25,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 00:44:25,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947252593] [2023-08-04 00:44:25,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:44:25,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:44:25,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:44:25,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:44:25,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:44:25,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 281 [2023-08-04 00:44:25,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 41 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:44:25,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:44:25,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 281 [2023-08-04 00:44:25,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:44:35,292 INFO L124 PetriNetUnfolderBase]: 75086/101861 cut-off events. [2023-08-04 00:44:35,292 INFO L125 PetriNetUnfolderBase]: For 1719/1719 co-relation queries the response was YES. [2023-08-04 00:44:35,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200662 conditions, 101861 events. 75086/101861 cut-off events. For 1719/1719 co-relation queries the response was YES. Maximal size of possible extension queue 3038. Compared 662896 event pairs, 60736 based on Foata normal form. 0/98249 useless extension candidates. Maximal degree in co-relation 200625. Up to 96475 conditions per place. [2023-08-04 00:44:35,725 INFO L140 encePairwiseOnDemand]: 278/281 looper letters, 40 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2023-08-04 00:44:35,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 49 transitions, 216 flow [2023-08-04 00:44:35,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:44:35,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:44:35,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 471 transitions. [2023-08-04 00:44:35,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5587188612099644 [2023-08-04 00:44:35,727 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 471 transitions. [2023-08-04 00:44:35,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 471 transitions. [2023-08-04 00:44:35,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:44:35,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 471 transitions. [2023-08-04 00:44:35,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:44:35,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:44:35,730 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:44:35,730 INFO L175 Difference]: Start difference. First operand has 57 places, 41 transitions, 116 flow. Second operand 3 states and 471 transitions. [2023-08-04 00:44:35,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 49 transitions, 216 flow [2023-08-04 00:44:35,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 49 transitions, 214 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:44:35,732 INFO L231 Difference]: Finished difference. Result has 58 places, 42 transitions, 126 flow [2023-08-04 00:44:35,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=58, PETRI_TRANSITIONS=42} [2023-08-04 00:44:35,732 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 4 predicate places. [2023-08-04 00:44:35,732 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 42 transitions, 126 flow [2023-08-04 00:44:35,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:44:35,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:44:35,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:44:35,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-04 00:44:35,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:44:35,941 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:44:35,942 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:44:35,942 INFO L85 PathProgramCache]: Analyzing trace with hash -246881463, now seen corresponding path program 1 times [2023-08-04 00:44:35,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:44:35,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344476784] [2023-08-04 00:44:35,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:44:35,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:44:35,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:44:36,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 00:44:36,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:44:36,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344476784] [2023-08-04 00:44:36,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344476784] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:44:36,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074750776] [2023-08-04 00:44:36,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:44:36,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:44:36,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:44:36,007 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:44:36,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 00:44:36,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:44:36,127 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 00:44:36,128 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:44:36,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 00:44:36,136 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:44:36,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074750776] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:44:36,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:44:36,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 00:44:36,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138700228] [2023-08-04 00:44:36,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:44:36,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:44:36,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:44:36,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:44:36,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:44:36,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 281 [2023-08-04 00:44:36,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 42 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:44:36,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:44:36,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 281 [2023-08-04 00:44:36,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:44:45,909 INFO L124 PetriNetUnfolderBase]: 73742/99074 cut-off events. [2023-08-04 00:44:45,909 INFO L125 PetriNetUnfolderBase]: For 977/977 co-relation queries the response was YES. [2023-08-04 00:44:46,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196289 conditions, 99074 events. 73742/99074 cut-off events. For 977/977 co-relation queries the response was YES. Maximal size of possible extension queue 3032. Compared 634973 event pairs, 57038 based on Foata normal form. 0/95459 useless extension candidates. Maximal degree in co-relation 56116. Up to 91805 conditions per place. [2023-08-04 00:44:46,337 INFO L140 encePairwiseOnDemand]: 278/281 looper letters, 46 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2023-08-04 00:44:46,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 55 transitions, 248 flow [2023-08-04 00:44:46,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:44:46,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:44:46,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 476 transitions. [2023-08-04 00:44:46,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564650059311981 [2023-08-04 00:44:46,339 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 476 transitions. [2023-08-04 00:44:46,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 476 transitions. [2023-08-04 00:44:46,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:44:46,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 476 transitions. [2023-08-04 00:44:46,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:44:46,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:44:46,341 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:44:46,342 INFO L175 Difference]: Start difference. First operand has 58 places, 42 transitions, 126 flow. Second operand 3 states and 476 transitions. [2023-08-04 00:44:46,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 55 transitions, 248 flow [2023-08-04 00:44:46,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 55 transitions, 246 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:44:46,344 INFO L231 Difference]: Finished difference. Result has 60 places, 43 transitions, 136 flow [2023-08-04 00:44:46,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=60, PETRI_TRANSITIONS=43} [2023-08-04 00:44:46,345 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 6 predicate places. [2023-08-04 00:44:46,345 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 43 transitions, 136 flow [2023-08-04 00:44:46,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:44:46,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:44:46,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:44:46,352 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-04 00:44:46,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-04 00:44:46,551 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:44:46,551 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:44:46,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1683245911, now seen corresponding path program 1 times [2023-08-04 00:44:46,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:44:46,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706218377] [2023-08-04 00:44:46,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:44:46,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:44:46,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:44:46,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 00:44:46,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:44:46,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706218377] [2023-08-04 00:44:46,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706218377] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:44:46,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570805981] [2023-08-04 00:44:46,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:44:46,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:44:46,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:44:46,608 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:44:46,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 00:44:46,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:44:46,742 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:44:46,748 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:44:46,758 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 00:44:46,758 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:44:46,770 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 00:44:46,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570805981] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:44:46,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:44:46,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 00:44:46,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107368609] [2023-08-04 00:44:46,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:44:46,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:44:46,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:44:46,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:44:46,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:44:46,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 281 [2023-08-04 00:44:46,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 43 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 146.0) internal successors, (730), 5 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:44:46,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:44:46,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 281 [2023-08-04 00:44:46,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:44:54,273 INFO L124 PetriNetUnfolderBase]: 57928/76580 cut-off events. [2023-08-04 00:44:54,273 INFO L125 PetriNetUnfolderBase]: For 5757/5757 co-relation queries the response was YES. [2023-08-04 00:44:54,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156965 conditions, 76580 events. 57928/76580 cut-off events. For 5757/5757 co-relation queries the response was YES. Maximal size of possible extension queue 2443. Compared 458352 event pairs, 36996 based on Foata normal form. 3/76034 useless extension candidates. Maximal degree in co-relation 55791. Up to 73594 conditions per place. [2023-08-04 00:44:54,622 INFO L140 encePairwiseOnDemand]: 277/281 looper letters, 40 selfloop transitions, 3 changer transitions 1/51 dead transitions. [2023-08-04 00:44:54,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 51 transitions, 240 flow [2023-08-04 00:44:54,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:44:54,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:44:54,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 611 transitions. [2023-08-04 00:44:54,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5435943060498221 [2023-08-04 00:44:54,624 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 611 transitions. [2023-08-04 00:44:54,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 611 transitions. [2023-08-04 00:44:54,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:44:54,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 611 transitions. [2023-08-04 00:44:54,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 152.75) internal successors, (611), 4 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:44:54,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 281.0) internal successors, (1405), 5 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:44:54,627 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 281.0) internal successors, (1405), 5 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:44:54,627 INFO L175 Difference]: Start difference. First operand has 60 places, 43 transitions, 136 flow. Second operand 4 states and 611 transitions. [2023-08-04 00:44:54,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 51 transitions, 240 flow [2023-08-04 00:44:54,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 51 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:44:54,632 INFO L231 Difference]: Finished difference. Result has 64 places, 43 transitions, 148 flow [2023-08-04 00:44:54,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=148, PETRI_PLACES=64, PETRI_TRANSITIONS=43} [2023-08-04 00:44:54,633 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 10 predicate places. [2023-08-04 00:44:54,633 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 43 transitions, 148 flow [2023-08-04 00:44:54,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 146.0) internal successors, (730), 5 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:44:54,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:44:54,633 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:44:54,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-04 00:44:54,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 00:44:54,839 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:44:54,839 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:44:54,839 INFO L85 PathProgramCache]: Analyzing trace with hash -289452616, now seen corresponding path program 1 times [2023-08-04 00:44:54,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:44:54,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118069152] [2023-08-04 00:44:54,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:44:54,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:44:54,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:44:54,907 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 00:44:54,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:44:54,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118069152] [2023-08-04 00:44:54,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118069152] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:44:54,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639427800] [2023-08-04 00:44:54,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:44:54,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:44:54,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:44:54,909 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:44:54,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 00:44:55,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:44:55,040 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:44:55,041 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:44:55,050 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 00:44:55,051 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:44:55,063 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 00:44:55,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639427800] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:44:55,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:44:55,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 00:44:55,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197578255] [2023-08-04 00:44:55,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:44:55,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:44:55,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:44:55,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:44:55,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:44:55,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 281 [2023-08-04 00:44:55,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 43 transitions, 148 flow. Second operand has 5 states, 5 states have (on average 146.2) internal successors, (731), 5 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:44:55,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:44:55,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 281 [2023-08-04 00:44:55,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:45:00,557 INFO L124 PetriNetUnfolderBase]: 45550/59659 cut-off events. [2023-08-04 00:45:00,557 INFO L125 PetriNetUnfolderBase]: For 3978/3978 co-relation queries the response was YES. [2023-08-04 00:45:00,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121916 conditions, 59659 events. 45550/59659 cut-off events. For 3978/3978 co-relation queries the response was YES. Maximal size of possible extension queue 2100. Compared 339380 event pairs, 29614 based on Foata normal form. 27/59272 useless extension candidates. Maximal degree in co-relation 43250. Up to 56617 conditions per place. [2023-08-04 00:45:01,015 INFO L140 encePairwiseOnDemand]: 277/281 looper letters, 48 selfloop transitions, 3 changer transitions 1/59 dead transitions. [2023-08-04 00:45:01,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 59 transitions, 284 flow [2023-08-04 00:45:01,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:45:01,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:45:01,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 619 transitions. [2023-08-04 00:45:01,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.550711743772242 [2023-08-04 00:45:01,017 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 619 transitions. [2023-08-04 00:45:01,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 619 transitions. [2023-08-04 00:45:01,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:45:01,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 619 transitions. [2023-08-04 00:45:01,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 154.75) internal successors, (619), 4 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:45:01,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 281.0) internal successors, (1405), 5 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:45:01,021 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 281.0) internal successors, (1405), 5 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:45:01,021 INFO L175 Difference]: Start difference. First operand has 64 places, 43 transitions, 148 flow. Second operand 4 states and 619 transitions. [2023-08-04 00:45:01,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 59 transitions, 284 flow [2023-08-04 00:45:01,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 59 transitions, 277 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 00:45:01,025 INFO L231 Difference]: Finished difference. Result has 66 places, 43 transitions, 155 flow [2023-08-04 00:45:01,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=155, PETRI_PLACES=66, PETRI_TRANSITIONS=43} [2023-08-04 00:45:01,026 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 12 predicate places. [2023-08-04 00:45:01,026 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 43 transitions, 155 flow [2023-08-04 00:45:01,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 146.2) internal successors, (731), 5 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:45:01,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:45:01,026 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:45:01,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 00:45:01,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 00:45:01,232 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:45:01,232 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:45:01,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1284594428, now seen corresponding path program 1 times [2023-08-04 00:45:01,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:45:01,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593894839] [2023-08-04 00:45:01,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:45:01,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:45:01,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:45:01,292 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 00:45:01,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:45:01,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593894839] [2023-08-04 00:45:01,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593894839] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:45:01,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882651010] [2023-08-04 00:45:01,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:45:01,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:45:01,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:45:01,295 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:45:01,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 00:45:01,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:45:01,438 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:45:01,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:45:01,454 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 00:45:01,454 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:45:01,466 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 00:45:01,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882651010] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:45:01,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:45:01,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 00:45:01,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908798633] [2023-08-04 00:45:01,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:45:01,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:45:01,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:45:01,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:45:01,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:45:01,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 281 [2023-08-04 00:45:01,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 43 transitions, 155 flow. Second operand has 5 states, 5 states have (on average 146.4) internal successors, (732), 5 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:45:01,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:45:01,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 281 [2023-08-04 00:45:01,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:45:06,346 INFO L124 PetriNetUnfolderBase]: 40906/52585 cut-off events. [2023-08-04 00:45:06,346 INFO L125 PetriNetUnfolderBase]: For 3106/3106 co-relation queries the response was YES. [2023-08-04 00:45:06,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108802 conditions, 52585 events. 40906/52585 cut-off events. For 3106/3106 co-relation queries the response was YES. Maximal size of possible extension queue 1914. Compared 283403 event pairs, 18820 based on Foata normal form. 324/52819 useless extension candidates. Maximal degree in co-relation 38573. Up to 34339 conditions per place. [2023-08-04 00:45:06,599 INFO L140 encePairwiseOnDemand]: 277/281 looper letters, 59 selfloop transitions, 3 changer transitions 1/70 dead transitions. [2023-08-04 00:45:06,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 70 transitions, 335 flow [2023-08-04 00:45:06,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:45:06,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:45:06,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 630 transitions. [2023-08-04 00:45:06,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5604982206405694 [2023-08-04 00:45:06,602 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 630 transitions. [2023-08-04 00:45:06,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 630 transitions. [2023-08-04 00:45:06,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:45:06,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 630 transitions. [2023-08-04 00:45:06,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 157.5) internal successors, (630), 4 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:45:06,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 281.0) internal successors, (1405), 5 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:45:06,606 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 281.0) internal successors, (1405), 5 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:45:06,606 INFO L175 Difference]: Start difference. First operand has 66 places, 43 transitions, 155 flow. Second operand 4 states and 630 transitions. [2023-08-04 00:45:06,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 70 transitions, 335 flow [2023-08-04 00:45:06,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 70 transitions, 328 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 00:45:06,610 INFO L231 Difference]: Finished difference. Result has 68 places, 43 transitions, 162 flow [2023-08-04 00:45:06,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=162, PETRI_PLACES=68, PETRI_TRANSITIONS=43} [2023-08-04 00:45:06,610 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 14 predicate places. [2023-08-04 00:45:06,610 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 43 transitions, 162 flow [2023-08-04 00:45:06,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 146.4) internal successors, (732), 5 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:45:06,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:45:06,611 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:45:06,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-04 00:45:06,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-04 00:45:06,816 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:45:06,817 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:45:06,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1488327477, now seen corresponding path program 1 times [2023-08-04 00:45:06,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:45:06,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441019115] [2023-08-04 00:45:06,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:45:06,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:45:06,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:45:07,247 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 00:45:07,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:45:07,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441019115] [2023-08-04 00:45:07,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441019115] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:45:07,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:45:07,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:45:07,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606723026] [2023-08-04 00:45:07,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:45:07,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 00:45:07,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:45:07,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 00:45:07,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 00:45:07,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 281 [2023-08-04 00:45:07,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 43 transitions, 162 flow. Second operand has 4 states, 4 states have (on average 147.75) internal successors, (591), 4 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:45:07,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:45:07,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 281 [2023-08-04 00:45:07,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:45:12,218 INFO L124 PetriNetUnfolderBase]: 38935/50371 cut-off events. [2023-08-04 00:45:12,218 INFO L125 PetriNetUnfolderBase]: For 12643/12643 co-relation queries the response was YES. [2023-08-04 00:45:12,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109063 conditions, 50371 events. 38935/50371 cut-off events. For 12643/12643 co-relation queries the response was YES. Maximal size of possible extension queue 1824. Compared 271727 event pairs, 11341 based on Foata normal form. 1296/51658 useless extension candidates. Maximal degree in co-relation 38624. Up to 40258 conditions per place. [2023-08-04 00:45:12,437 INFO L140 encePairwiseOnDemand]: 276/281 looper letters, 49 selfloop transitions, 3 changer transitions 25/84 dead transitions. [2023-08-04 00:45:12,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 84 transitions, 420 flow [2023-08-04 00:45:12,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 00:45:12,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 00:45:12,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 790 transitions. [2023-08-04 00:45:12,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5622775800711743 [2023-08-04 00:45:12,440 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 790 transitions. [2023-08-04 00:45:12,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 790 transitions. [2023-08-04 00:45:12,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:45:12,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 790 transitions. [2023-08-04 00:45:12,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 158.0) internal successors, (790), 5 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:45:12,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 281.0) internal successors, (1686), 6 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:45:12,444 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 281.0) internal successors, (1686), 6 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:45:12,444 INFO L175 Difference]: Start difference. First operand has 68 places, 43 transitions, 162 flow. Second operand 5 states and 790 transitions. [2023-08-04 00:45:12,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 84 transitions, 420 flow [2023-08-04 00:45:12,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 84 transitions, 408 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 00:45:12,462 INFO L231 Difference]: Finished difference. Result has 72 places, 45 transitions, 182 flow [2023-08-04 00:45:12,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=182, PETRI_PLACES=72, PETRI_TRANSITIONS=45} [2023-08-04 00:45:12,463 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 18 predicate places. [2023-08-04 00:45:12,463 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 45 transitions, 182 flow [2023-08-04 00:45:12,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 147.75) internal successors, (591), 4 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:45:12,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:45:12,463 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:45:12,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-04 00:45:12,463 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:45:12,464 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:45:12,464 INFO L85 PathProgramCache]: Analyzing trace with hash -52655583, now seen corresponding path program 1 times [2023-08-04 00:45:12,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:45:12,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039016006] [2023-08-04 00:45:12,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:45:12,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:45:12,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:45:12,687 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 00:45:12,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:45:12,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039016006] [2023-08-04 00:45:12,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039016006] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:45:12,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324094242] [2023-08-04 00:45:12,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:45:12,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:45:12,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:45:12,690 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:45:12,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-04 00:45:12,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:45:12,821 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-04 00:45:12,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:45:12,856 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 00:45:12,856 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:45:12,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324094242] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:45:12,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:45:12,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 00:45:12,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800570250] [2023-08-04 00:45:12,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:45:12,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:45:12,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:45:12,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:45:12,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-04 00:45:12,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 281 [2023-08-04 00:45:12,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 45 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:45:12,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:45:12,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 281 [2023-08-04 00:45:12,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:45:16,759 INFO L124 PetriNetUnfolderBase]: 31486/40210 cut-off events. [2023-08-04 00:45:16,759 INFO L125 PetriNetUnfolderBase]: For 18582/18582 co-relation queries the response was YES. [2023-08-04 00:45:16,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96890 conditions, 40210 events. 31486/40210 cut-off events. For 18582/18582 co-relation queries the response was YES. Maximal size of possible extension queue 1415. Compared 207385 event pairs, 7304 based on Foata normal form. 144/40258 useless extension candidates. Maximal degree in co-relation 83175. Up to 38053 conditions per place. [2023-08-04 00:45:17,153 INFO L140 encePairwiseOnDemand]: 273/281 looper letters, 63 selfloop transitions, 7 changer transitions 0/77 dead transitions. [2023-08-04 00:45:17,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 77 transitions, 459 flow [2023-08-04 00:45:17,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:45:17,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:45:17,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 481 transitions. [2023-08-04 00:45:17,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5705812574139977 [2023-08-04 00:45:17,155 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 481 transitions. [2023-08-04 00:45:17,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 481 transitions. [2023-08-04 00:45:17,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:45:17,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 481 transitions. [2023-08-04 00:45:17,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:45:17,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:45:17,157 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:45:17,158 INFO L175 Difference]: Start difference. First operand has 72 places, 45 transitions, 182 flow. Second operand 3 states and 481 transitions. [2023-08-04 00:45:17,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 77 transitions, 459 flow [2023-08-04 00:45:17,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 77 transitions, 452 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 00:45:17,328 INFO L231 Difference]: Finished difference. Result has 71 places, 51 transitions, 224 flow [2023-08-04 00:45:17,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=224, PETRI_PLACES=71, PETRI_TRANSITIONS=51} [2023-08-04 00:45:17,329 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 17 predicate places. [2023-08-04 00:45:17,329 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 51 transitions, 224 flow [2023-08-04 00:45:17,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:45:17,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:45:17,329 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:45:17,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-04 00:45:17,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-04 00:45:17,533 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:45:17,533 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:45:17,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1064212209, now seen corresponding path program 1 times [2023-08-04 00:45:17,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:45:17,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087046960] [2023-08-04 00:45:17,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:45:17,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:45:17,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:45:17,721 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 00:45:17,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:45:17,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087046960] [2023-08-04 00:45:17,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087046960] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:45:17,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:45:17,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:45:17,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896707659] [2023-08-04 00:45:17,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:45:17,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 00:45:17,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:45:17,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 00:45:17,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 00:45:17,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 281 [2023-08-04 00:45:17,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 51 transitions, 224 flow. Second operand has 4 states, 4 states have (on average 151.5) internal successors, (606), 4 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:45:17,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:45:17,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 281 [2023-08-04 00:45:17,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:45:22,212 INFO L124 PetriNetUnfolderBase]: 33236/45124 cut-off events. [2023-08-04 00:45:22,213 INFO L125 PetriNetUnfolderBase]: For 31382/31382 co-relation queries the response was YES. [2023-08-04 00:45:22,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121237 conditions, 45124 events. 33236/45124 cut-off events. For 31382/31382 co-relation queries the response was YES. Maximal size of possible extension queue 1660. Compared 274798 event pairs, 7507 based on Foata normal form. 927/45902 useless extension candidates. Maximal degree in co-relation 121151. Up to 36717 conditions per place. [2023-08-04 00:45:22,447 INFO L140 encePairwiseOnDemand]: 276/281 looper letters, 77 selfloop transitions, 3 changer transitions 27/114 dead transitions. [2023-08-04 00:45:22,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 114 transitions, 699 flow [2023-08-04 00:45:22,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 00:45:22,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 00:45:22,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 819 transitions. [2023-08-04 00:45:22,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5829181494661921 [2023-08-04 00:45:22,449 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 819 transitions. [2023-08-04 00:45:22,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 819 transitions. [2023-08-04 00:45:22,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:45:22,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 819 transitions. [2023-08-04 00:45:22,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 163.8) internal successors, (819), 5 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:45:22,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 281.0) internal successors, (1686), 6 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:45:22,452 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 281.0) internal successors, (1686), 6 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:45:22,452 INFO L175 Difference]: Start difference. First operand has 71 places, 51 transitions, 224 flow. Second operand 5 states and 819 transitions. [2023-08-04 00:45:22,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 114 transitions, 699 flow [2023-08-04 00:45:22,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 114 transitions, 688 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:45:22,472 INFO L231 Difference]: Finished difference. Result has 77 places, 53 transitions, 244 flow [2023-08-04 00:45:22,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=244, PETRI_PLACES=77, PETRI_TRANSITIONS=53} [2023-08-04 00:45:22,473 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 23 predicate places. [2023-08-04 00:45:22,473 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 53 transitions, 244 flow [2023-08-04 00:45:22,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 151.5) internal successors, (606), 4 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:45:22,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:45:22,474 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:45:22,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-04 00:45:22,474 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:45:22,474 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:45:22,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1613899611, now seen corresponding path program 1 times [2023-08-04 00:45:22,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:45:22,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424663418] [2023-08-04 00:45:22,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:45:22,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:45:22,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:45:22,624 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 00:45:22,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:45:22,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424663418] [2023-08-04 00:45:22,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424663418] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:45:22,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530946533] [2023-08-04 00:45:22,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:45:22,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:45:22,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:45:22,626 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:45:22,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-04 00:45:22,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:45:22,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-04 00:45:22,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:45:22,848 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-04 00:45:22,848 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:45:22,943 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-04 00:45:22,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530946533] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:45:22,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:45:22,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-08-04 00:45:22,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350656426] [2023-08-04 00:45:22,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:45:22,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 00:45:22,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:45:22,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 00:45:22,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-04 00:45:22,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 281 [2023-08-04 00:45:22,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 53 transitions, 244 flow. Second operand has 8 states, 8 states have (on average 141.0) internal successors, (1128), 8 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:45:22,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:45:22,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 281 [2023-08-04 00:45:22,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:45:27,619 INFO L124 PetriNetUnfolderBase]: 30063/40577 cut-off events. [2023-08-04 00:45:27,619 INFO L125 PetriNetUnfolderBase]: For 49421/49421 co-relation queries the response was YES. [2023-08-04 00:45:27,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122576 conditions, 40577 events. 30063/40577 cut-off events. For 49421/49421 co-relation queries the response was YES. Maximal size of possible extension queue 1375. Compared 241100 event pairs, 713 based on Foata normal form. 1983/42504 useless extension candidates. Maximal degree in co-relation 118521. Up to 15852 conditions per place. [2023-08-04 00:45:28,088 INFO L140 encePairwiseOnDemand]: 267/281 looper letters, 220 selfloop transitions, 73 changer transitions 58/358 dead transitions. [2023-08-04 00:45:28,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 358 transitions, 2329 flow [2023-08-04 00:45:28,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-04 00:45:28,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-04 00:45:28,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2431 transitions. [2023-08-04 00:45:28,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.540702846975089 [2023-08-04 00:45:28,093 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2431 transitions. [2023-08-04 00:45:28,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2431 transitions. [2023-08-04 00:45:28,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:45:28,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2431 transitions. [2023-08-04 00:45:28,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 151.9375) internal successors, (2431), 16 states have internal predecessors, (2431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:45:28,102 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 281.0) internal successors, (4777), 17 states have internal predecessors, (4777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:45:28,103 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 281.0) internal successors, (4777), 17 states have internal predecessors, (4777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:45:28,103 INFO L175 Difference]: Start difference. First operand has 77 places, 53 transitions, 244 flow. Second operand 16 states and 2431 transitions. [2023-08-04 00:45:28,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 358 transitions, 2329 flow [2023-08-04 00:45:28,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 358 transitions, 2304 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 00:45:28,177 INFO L231 Difference]: Finished difference. Result has 101 places, 129 transitions, 912 flow [2023-08-04 00:45:28,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=912, PETRI_PLACES=101, PETRI_TRANSITIONS=129} [2023-08-04 00:45:28,178 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 47 predicate places. [2023-08-04 00:45:28,178 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 129 transitions, 912 flow [2023-08-04 00:45:28,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 141.0) internal successors, (1128), 8 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:45:28,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:45:28,178 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:45:28,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-04 00:45:28,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:45:28,379 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:45:28,379 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:45:28,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1382164854, now seen corresponding path program 1 times [2023-08-04 00:45:28,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:45:28,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331964603] [2023-08-04 00:45:28,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:45:28,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:45:28,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:45:30,290 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 00:45:30,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:45:30,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331964603] [2023-08-04 00:45:30,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331964603] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:45:30,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924175838] [2023-08-04 00:45:30,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:45:30,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:45:30,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:45:30,294 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:45:30,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-04 00:45:30,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:45:30,449 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 73 conjunts are in the unsatisfiable core [2023-08-04 00:45:30,454 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:45:30,498 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-04 00:45:30,499 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-08-04 00:45:30,554 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 00:45:30,636 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 00:45:30,723 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 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-04 00:45:30,877 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-04 00:45:30,877 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-08-04 00:45:30,960 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 00:45:31,085 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 00:45:31,211 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-04 00:45:31,211 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 00:45:31,279 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 00:45:31,386 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 00:45:31,866 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 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-04 00:45:31,958 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 00:45:31,958 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:45:48,134 WARN L233 SmtUtils]: Spent 13.67s on a formula simplification. DAG size of input: 70 DAG size of output: 53 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-04 00:45:48,466 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 00:45:48,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924175838] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:45:48,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:45:48,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 13] total 32 [2023-08-04 00:45:48,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162090291] [2023-08-04 00:45:48,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:45:48,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-04 00:45:48,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:45:48,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-04 00:45:48,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=887, Unknown=9, NotChecked=0, Total=1122 [2023-08-04 00:45:50,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 00:45:51,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 281 [2023-08-04 00:45:51,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 129 transitions, 912 flow. Second operand has 34 states, 34 states have (on average 106.79411764705883) internal successors, (3631), 34 states have internal predecessors, (3631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:45:51,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:45:51,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 281 [2023-08-04 00:45:51,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:46:06,732 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 00:46:19,771 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 00:46:25,640 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 00:46:34,887 INFO L124 PetriNetUnfolderBase]: 81343/109029 cut-off events. [2023-08-04 00:46:34,887 INFO L125 PetriNetUnfolderBase]: For 511849/511849 co-relation queries the response was YES. [2023-08-04 00:46:35,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 470975 conditions, 109029 events. 81343/109029 cut-off events. For 511849/511849 co-relation queries the response was YES. Maximal size of possible extension queue 3786. Compared 688617 event pairs, 14065 based on Foata normal form. 242/109263 useless extension candidates. Maximal degree in co-relation 470866. Up to 69717 conditions per place. [2023-08-04 00:46:35,985 INFO L140 encePairwiseOnDemand]: 259/281 looper letters, 552 selfloop transitions, 505 changer transitions 83/1145 dead transitions. [2023-08-04 00:46:35,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 1145 transitions, 10522 flow [2023-08-04 00:46:35,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-08-04 00:46:35,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-08-04 00:46:35,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 5450 transitions. [2023-08-04 00:46:35,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4216308215998762 [2023-08-04 00:46:35,997 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 5450 transitions. [2023-08-04 00:46:35,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 5450 transitions. [2023-08-04 00:46:35,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:46:35,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 5450 transitions. [2023-08-04 00:46:36,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 118.47826086956522) internal successors, (5450), 46 states have internal predecessors, (5450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:46:36,016 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 281.0) internal successors, (13207), 47 states have internal predecessors, (13207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:46:36,019 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 281.0) internal successors, (13207), 47 states have internal predecessors, (13207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:46:36,019 INFO L175 Difference]: Start difference. First operand has 101 places, 129 transitions, 912 flow. Second operand 46 states and 5450 transitions. [2023-08-04 00:46:36,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 1145 transitions, 10522 flow [2023-08-04 00:46:46,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 1145 transitions, 9815 flow, removed 331 selfloop flow, removed 3 redundant places. [2023-08-04 00:46:46,608 INFO L231 Difference]: Finished difference. Result has 157 places, 663 transitions, 5154 flow [2023-08-04 00:46:46,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=807, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=5154, PETRI_PLACES=157, PETRI_TRANSITIONS=663} [2023-08-04 00:46:46,609 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 103 predicate places. [2023-08-04 00:46:46,609 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 663 transitions, 5154 flow [2023-08-04 00:46:46,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 106.79411764705883) internal successors, (3631), 34 states have internal predecessors, (3631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:46:46,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:46:46,611 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:46:46,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-08-04 00:46:46,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:46:46,818 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:46:46,818 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:46:46,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1846292700, now seen corresponding path program 2 times [2023-08-04 00:46:46,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:46:46,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971236157] [2023-08-04 00:46:46,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:46:46,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:46:46,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:46:48,546 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 00:46:48,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:46:48,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971236157] [2023-08-04 00:46:48,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971236157] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:46:48,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326160682] [2023-08-04 00:46:48,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 00:46:48,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:46:48,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:46:48,549 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:46:48,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-04 00:46:48,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 00:46:48,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 00:46:48,729 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 65 conjunts are in the unsatisfiable core [2023-08-04 00:46:48,734 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:46:48,762 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-04 00:46:48,763 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-08-04 00:46:48,824 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 14 treesize of output 16 [2023-08-04 00:46:48,905 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 00:46:48,996 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-04 00:46:48,996 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-08-04 00:46:49,074 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 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-04 00:46:49,254 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 00:46:49,442 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 00:46:49,582 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-04 00:46:49,582 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 00:46:49,663 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 00:46:49,754 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 00:46:49,922 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 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-04 00:46:49,997 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 00:46:49,998 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:47:04,562 WARN L233 SmtUtils]: Spent 8.72s on a formula simplification that was a NOOP. DAG size: 48 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-04 00:47:04,920 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 00:47:04,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326160682] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:47:04,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:47:04,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2023-08-04 00:47:04,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816536392] [2023-08-04 00:47:04,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:47:04,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-04 00:47:04,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:47:04,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-04 00:47:04,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=645, Unknown=8, NotChecked=0, Total=756 [2023-08-04 00:47:06,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 00:47:07,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 281 [2023-08-04 00:47:07,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 663 transitions, 5154 flow. Second operand has 28 states, 28 states have (on average 114.39285714285714) internal successors, (3203), 28 states have internal predecessors, (3203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:47:07,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:47:07,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 281 [2023-08-04 00:47:07,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:47:09,480 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 00:47:30,944 INFO L124 PetriNetUnfolderBase]: 88320/118313 cut-off events. [2023-08-04 00:47:30,944 INFO L125 PetriNetUnfolderBase]: For 666159/666159 co-relation queries the response was YES. [2023-08-04 00:47:31,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 582967 conditions, 118313 events. 88320/118313 cut-off events. For 666159/666159 co-relation queries the response was YES. Maximal size of possible extension queue 4168. Compared 749520 event pairs, 13288 based on Foata normal form. 234/118541 useless extension candidates. Maximal degree in co-relation 582857. Up to 94120 conditions per place. [2023-08-04 00:47:32,237 INFO L140 encePairwiseOnDemand]: 270/281 looper letters, 877 selfloop transitions, 64 changer transitions 43/989 dead transitions. [2023-08-04 00:47:32,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 989 transitions, 9685 flow [2023-08-04 00:47:32,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-04 00:47:32,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-04 00:47:32,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1226 transitions. [2023-08-04 00:47:32,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43629893238434164 [2023-08-04 00:47:32,239 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1226 transitions. [2023-08-04 00:47:32,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1226 transitions. [2023-08-04 00:47:32,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:47:32,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1226 transitions. [2023-08-04 00:47:32,241 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 122.6) internal successors, (1226), 10 states have internal predecessors, (1226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:47:32,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 281.0) internal successors, (3091), 11 states have internal predecessors, (3091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:47:32,243 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 281.0) internal successors, (3091), 11 states have internal predecessors, (3091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:47:32,243 INFO L175 Difference]: Start difference. First operand has 157 places, 663 transitions, 5154 flow. Second operand 10 states and 1226 transitions. [2023-08-04 00:47:32,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 989 transitions, 9685 flow [2023-08-04 00:47:56,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 989 transitions, 8979 flow, removed 353 selfloop flow, removed 7 redundant places. [2023-08-04 00:47:56,924 INFO L231 Difference]: Finished difference. Result has 157 places, 698 transitions, 5094 flow [2023-08-04 00:47:56,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=4618, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=602, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5094, PETRI_PLACES=157, PETRI_TRANSITIONS=698} [2023-08-04 00:47:56,925 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 103 predicate places. [2023-08-04 00:47:56,925 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 698 transitions, 5094 flow [2023-08-04 00:47:56,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 114.39285714285714) internal successors, (3203), 28 states have internal predecessors, (3203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:47:56,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:47:56,926 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:47:56,933 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-08-04 00:47:57,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:47:57,132 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:47:57,132 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:47:57,132 INFO L85 PathProgramCache]: Analyzing trace with hash -520529238, now seen corresponding path program 3 times [2023-08-04 00:47:57,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:47:57,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053054399] [2023-08-04 00:47:57,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:47:57,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:47:57,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:47:57,288 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-04 00:47:57,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:47:57,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053054399] [2023-08-04 00:47:57,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053054399] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:47:57,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:47:57,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 00:47:57,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753272604] [2023-08-04 00:47:57,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:47:57,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:47:57,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:47:57,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:47:57,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:47:57,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 281 [2023-08-04 00:47:57,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 698 transitions, 5094 flow. Second operand has 5 states, 5 states have (on average 145.4) internal successors, (727), 5 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:47:57,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:47:57,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 281 [2023-08-04 00:47:57,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:48:49,441 INFO L124 PetriNetUnfolderBase]: 248802/327221 cut-off events. [2023-08-04 00:48:49,441 INFO L125 PetriNetUnfolderBase]: For 1669102/1675800 co-relation queries the response was YES. [2023-08-04 00:48:51,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1544966 conditions, 327221 events. 248802/327221 cut-off events. For 1669102/1675800 co-relation queries the response was YES. Maximal size of possible extension queue 10737. Compared 2198686 event pairs, 17445 based on Foata normal form. 3925/326577 useless extension candidates. Maximal degree in co-relation 1500153. Up to 147467 conditions per place. [2023-08-04 00:48:53,094 INFO L140 encePairwiseOnDemand]: 275/281 looper letters, 1086 selfloop transitions, 10 changer transitions 200/1377 dead transitions. [2023-08-04 00:48:53,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 1377 transitions, 12527 flow [2023-08-04 00:48:53,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 00:48:53,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 00:48:53,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 804 transitions. [2023-08-04 00:48:53,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5722419928825623 [2023-08-04 00:48:53,096 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 804 transitions. [2023-08-04 00:48:53,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 804 transitions. [2023-08-04 00:48:53,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:48:53,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 804 transitions. [2023-08-04 00:48:53,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 160.8) internal successors, (804), 5 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:48:53,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 281.0) internal successors, (1686), 6 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:48:53,098 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 281.0) internal successors, (1686), 6 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:48:53,098 INFO L175 Difference]: Start difference. First operand has 157 places, 698 transitions, 5094 flow. Second operand 5 states and 804 transitions. [2023-08-04 00:48:53,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 1377 transitions, 12527 flow [2023-08-04 00:54:28,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 1377 transitions, 12406 flow, removed 7 selfloop flow, removed 5 redundant places. [2023-08-04 00:54:28,660 INFO L231 Difference]: Finished difference. Result has 157 places, 698 transitions, 5048 flow [2023-08-04 00:54:28,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=5010, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=688, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5048, PETRI_PLACES=157, PETRI_TRANSITIONS=698} [2023-08-04 00:54:28,661 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 103 predicate places. [2023-08-04 00:54:28,661 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 698 transitions, 5048 flow [2023-08-04 00:54:28,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 145.4) internal successors, (727), 5 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:54:28,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:54:28,661 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:54:28,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-04 00:54:28,661 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:54:28,662 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:54:28,662 INFO L85 PathProgramCache]: Analyzing trace with hash 411171202, now seen corresponding path program 4 times [2023-08-04 00:54:28,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:54:28,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124867868] [2023-08-04 00:54:28,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:54:28,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:54:28,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:54:29,839 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 00:54:29,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:54:29,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124867868] [2023-08-04 00:54:29,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124867868] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:54:29,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360424407] [2023-08-04 00:54:29,840 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-04 00:54:29,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:54:29,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:54:29,845 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:54:29,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-04 00:54:30,002 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-04 00:54:30,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 00:54:30,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 73 conjunts are in the unsatisfiable core [2023-08-04 00:54:30,007 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:54:30,031 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-04 00:54:30,031 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-08-04 00:54:30,074 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 00:54:30,151 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 00:54:30,253 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-04 00:54:30,254 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-08-04 00:54:30,298 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 00:54:30,398 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 00:54:30,476 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-04 00:54:30,477 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 00:54:30,545 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 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-04 00:54:30,632 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 00:54:30,733 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 00:54:31,082 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 0 case distinctions, treesize of input 19 treesize of output 11 [2023-08-04 00:54:31,156 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 00:54:31,157 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:54:39,452 WARN L233 SmtUtils]: Spent 7.24s on a formula simplification. DAG size of input: 45 DAG size of output: 42 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-04 00:54:40,103 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 00:54:40,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360424407] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:54:40,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:54:40,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 32 [2023-08-04 00:54:40,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124243840] [2023-08-04 00:54:40,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:54:40,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-04 00:54:40,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:54:40,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-04 00:54:40,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=946, Unknown=3, NotChecked=0, Total=1122 [2023-08-04 00:54:41,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 281 [2023-08-04 00:54:41,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 698 transitions, 5048 flow. Second operand has 34 states, 34 states have (on average 107.79411764705883) internal successors, (3665), 34 states have internal predecessors, (3665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:54:41,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:54:41,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 281 [2023-08-04 00:54:41,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand