/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe014_power.oepc_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 06:52:43,254 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 06:52:43,325 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 06:52:43,329 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 06:52:43,329 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 06:52:43,330 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 06:52:43,330 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 06:52:43,363 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 06:52:43,363 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 06:52:43,364 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 06:52:43,364 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 06:52:43,364 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 06:52:43,365 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 06:52:43,365 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 06:52:43,366 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 06:52:43,366 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 06:52:43,366 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 06:52:43,366 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 06:52:43,367 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 06:52:43,367 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 06:52:43,367 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 06:52:43,371 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 06:52:43,371 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 06:52:43,371 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 06:52:43,375 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 06:52:43,376 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 06:52:43,376 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 06:52:43,376 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 06:52:43,377 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 06:52:43,377 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 06:52:43,378 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 06:52:43,378 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 06:52:43,378 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 06:52:43,378 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 06:52:43,378 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 06:52:43,378 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 06:52:43,379 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 06:52:43,379 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 06:52:43,379 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 06:52:43,379 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 06:52:43,379 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 06:52:43,379 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 06:52:43,567 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 06:52:43,583 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 06:52:43,585 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 06:52:43,586 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 06:52:43,586 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 06:52:43,587 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe014_power.oepc_bound2.i [2023-08-04 06:52:44,670 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 06:52:44,931 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 06:52:44,932 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe014_power.oepc_bound2.i [2023-08-04 06:52:44,944 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e548bae0/cf8883271c9145d5ba515585a3178211/FLAG36b8f1a6f [2023-08-04 06:52:44,959 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e548bae0/cf8883271c9145d5ba515585a3178211 [2023-08-04 06:52:44,961 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 06:52:44,962 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 06:52:44,963 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 06:52:44,964 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 06:52:44,966 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 06:52:44,967 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 06:52:44" (1/1) ... [2023-08-04 06:52:44,967 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10ea3dd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:52:44, skipping insertion in model container [2023-08-04 06:52:44,968 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 06:52:44" (1/1) ... [2023-08-04 06:52:44,999 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 06:52:45,095 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_safe014_power.oepc_bound2.i[995,1008] [2023-08-04 06:52:45,277 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 06:52:45,284 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 06:52:45,298 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_safe014_power.oepc_bound2.i[995,1008] [2023-08-04 06:52:45,303 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-04 06:52:45,304 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-04 06:52:45,323 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 06:52:45,342 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 06:52:45,342 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 06:52:45,347 INFO L206 MainTranslator]: Completed translation [2023-08-04 06:52:45,347 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:52:45 WrapperNode [2023-08-04 06:52:45,347 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 06:52:45,348 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 06:52:45,348 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 06:52:45,348 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 06:52:45,352 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:52:45" (1/1) ... [2023-08-04 06:52:45,363 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:52:45" (1/1) ... [2023-08-04 06:52:45,390 INFO L138 Inliner]: procedures = 176, calls = 69, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 161 [2023-08-04 06:52:45,390 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 06:52:45,391 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 06:52:45,391 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 06:52:45,391 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 06:52:45,396 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:52:45" (1/1) ... [2023-08-04 06:52:45,396 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:52:45" (1/1) ... [2023-08-04 06:52:45,399 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:52:45" (1/1) ... [2023-08-04 06:52:45,400 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:52:45" (1/1) ... [2023-08-04 06:52:45,407 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:52:45" (1/1) ... [2023-08-04 06:52:45,409 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:52:45" (1/1) ... [2023-08-04 06:52:45,411 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:52:45" (1/1) ... [2023-08-04 06:52:45,412 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:52:45" (1/1) ... [2023-08-04 06:52:45,414 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 06:52:45,415 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 06:52:45,415 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 06:52:45,415 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 06:52:45,415 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:52:45" (1/1) ... [2023-08-04 06:52:45,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 06:52:45,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:52:45,466 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 06:52:45,473 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 06:52:45,493 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 06:52:45,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 06:52:45,494 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 06:52:45,494 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 06:52:45,494 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 06:52:45,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 06:52:45,495 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 06:52:45,496 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 06:52:45,496 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 06:52:45,496 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 06:52:45,496 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-04 06:52:45,496 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-04 06:52:45,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 06:52:45,497 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 06:52:45,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 06:52:45,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 06:52:45,498 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 06:52:45,616 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 06:52:45,617 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 06:52:45,885 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 06:52:46,082 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 06:52:46,083 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-04 06:52:46,084 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 06:52:46 BoogieIcfgContainer [2023-08-04 06:52:46,084 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 06:52:46,087 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 06:52:46,088 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 06:52:46,090 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 06:52:46,090 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 06:52:44" (1/3) ... [2023-08-04 06:52:46,091 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5761e205 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 06:52:46, skipping insertion in model container [2023-08-04 06:52:46,091 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:52:45" (2/3) ... [2023-08-04 06:52:46,091 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5761e205 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 06:52:46, skipping insertion in model container [2023-08-04 06:52:46,091 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 06:52:46" (3/3) ... [2023-08-04 06:52:46,092 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe014_power.oepc_bound2.i [2023-08-04 06:52:46,097 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 06:52:46,103 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 06:52:46,103 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 06:52:46,103 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 06:52:46,150 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 06:52:46,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 147 places, 145 transitions, 305 flow [2023-08-04 06:52:46,308 INFO L124 PetriNetUnfolderBase]: 30/463 cut-off events. [2023-08-04 06:52:46,308 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:52:46,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 488 conditions, 463 events. 30/463 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1954 event pairs, 0 based on Foata normal form. 0/411 useless extension candidates. Maximal degree in co-relation 284. Up to 16 conditions per place. [2023-08-04 06:52:46,316 INFO L82 GeneralOperation]: Start removeDead. Operand has 147 places, 145 transitions, 305 flow [2023-08-04 06:52:46,323 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 133 places, 130 transitions, 269 flow [2023-08-04 06:52:46,326 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 06:52:46,338 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 133 places, 130 transitions, 269 flow [2023-08-04 06:52:46,341 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 133 places, 130 transitions, 269 flow [2023-08-04 06:52:46,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 130 transitions, 269 flow [2023-08-04 06:52:46,383 INFO L124 PetriNetUnfolderBase]: 22/360 cut-off events. [2023-08-04 06:52:46,383 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:52:46,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 378 conditions, 360 events. 22/360 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1351 event pairs, 0 based on Foata normal form. 0/324 useless extension candidates. Maximal degree in co-relation 230. Up to 16 conditions per place. [2023-08-04 06:52:46,389 INFO L119 LiptonReduction]: Number of co-enabled transitions 1732 [2023-08-04 06:52:51,452 INFO L134 LiptonReduction]: Checked pairs total: 4370 [2023-08-04 06:52:51,453 INFO L136 LiptonReduction]: Total number of compositions: 110 [2023-08-04 06:52:51,464 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 06:52:51,469 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;@50bfaf77, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 06:52:51,469 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 06:52:51,474 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 06:52:51,474 INFO L124 PetriNetUnfolderBase]: 2/34 cut-off events. [2023-08-04 06:52:51,474 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:52:51,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:52:51,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:52:51,475 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:52:51,478 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:52:51,479 INFO L85 PathProgramCache]: Analyzing trace with hash -558821496, now seen corresponding path program 1 times [2023-08-04 06:52:51,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:52:51,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254152794] [2023-08-04 06:52:51,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:52:51,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:52:51,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:52:51,772 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 06:52:51,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:52:51,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254152794] [2023-08-04 06:52:51,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254152794] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:52:51,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 06:52:51,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 06:52:51,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358564675] [2023-08-04 06:52:51,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:52:51,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:52:51,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:52:51,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:52:51,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 06:52:51,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 255 [2023-08-04 06:52:51,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 28 transitions, 65 flow. Second operand has 3 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:52:51,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:52:51,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 255 [2023-08-04 06:52:51,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:52:52,093 INFO L124 PetriNetUnfolderBase]: 836/1436 cut-off events. [2023-08-04 06:52:52,094 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:52:52,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2821 conditions, 1436 events. 836/1436 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 7745 event pairs, 498 based on Foata normal form. 60/1346 useless extension candidates. Maximal degree in co-relation 2808. Up to 1344 conditions per place. [2023-08-04 06:52:52,102 INFO L140 encePairwiseOnDemand]: 251/255 looper letters, 23 selfloop transitions, 2 changer transitions 2/30 dead transitions. [2023-08-04 06:52:52,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 30 transitions, 123 flow [2023-08-04 06:52:52,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:52:52,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:52:52,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 413 transitions. [2023-08-04 06:52:52,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5398692810457516 [2023-08-04 06:52:52,116 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 413 transitions. [2023-08-04 06:52:52,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 413 transitions. [2023-08-04 06:52:52,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:52:52,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 413 transitions. [2023-08-04 06:52:52,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:52:52,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:52:52,127 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:52:52,129 INFO L175 Difference]: Start difference. First operand has 34 places, 28 transitions, 65 flow. Second operand 3 states and 413 transitions. [2023-08-04 06:52:52,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 30 transitions, 123 flow [2023-08-04 06:52:52,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 30 transitions, 123 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 06:52:52,132 INFO L231 Difference]: Finished difference. Result has 37 places, 26 transitions, 69 flow [2023-08-04 06:52:52,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=63, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=37, PETRI_TRANSITIONS=26} [2023-08-04 06:52:52,135 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 3 predicate places. [2023-08-04 06:52:52,135 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 26 transitions, 69 flow [2023-08-04 06:52:52,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:52:52,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:52:52,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:52:52,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 06:52:52,136 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:52:52,137 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:52:52,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1512684197, now seen corresponding path program 1 times [2023-08-04 06:52:52,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:52:52,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616147937] [2023-08-04 06:52:52,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:52:52,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:52:52,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:52:52,201 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 06:52:52,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:52:52,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616147937] [2023-08-04 06:52:52,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616147937] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:52:52,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862272035] [2023-08-04 06:52:52,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:52:52,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:52:52,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:52:52,210 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 06:52:52,225 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 06:52:52,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:52:52,371 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 06:52:52,373 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:52:52,383 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 06:52:52,384 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 06:52:52,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862272035] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:52:52,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 06:52:52,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 06:52:52,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147656495] [2023-08-04 06:52:52,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:52:52,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:52:52,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:52:52,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:52:52,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:52:52,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 255 [2023-08-04 06:52:52,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 26 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:52:52,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:52:52,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 255 [2023-08-04 06:52:52,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:52:52,564 INFO L124 PetriNetUnfolderBase]: 608/1016 cut-off events. [2023-08-04 06:52:52,565 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 06:52:52,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2017 conditions, 1016 events. 608/1016 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4844 event pairs, 487 based on Foata normal form. 0/952 useless extension candidates. Maximal degree in co-relation 2001. Up to 934 conditions per place. [2023-08-04 06:52:52,568 INFO L140 encePairwiseOnDemand]: 252/255 looper letters, 25 selfloop transitions, 2 changer transitions 1/31 dead transitions. [2023-08-04 06:52:52,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 31 transitions, 135 flow [2023-08-04 06:52:52,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:52:52,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:52:52,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 413 transitions. [2023-08-04 06:52:52,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5398692810457516 [2023-08-04 06:52:52,571 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 413 transitions. [2023-08-04 06:52:52,571 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 413 transitions. [2023-08-04 06:52:52,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:52:52,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 413 transitions. [2023-08-04 06:52:52,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:52:52,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:52:52,574 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:52:52,574 INFO L175 Difference]: Start difference. First operand has 37 places, 26 transitions, 69 flow. Second operand 3 states and 413 transitions. [2023-08-04 06:52:52,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 31 transitions, 135 flow [2023-08-04 06:52:52,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 31 transitions, 131 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 06:52:52,575 INFO L231 Difference]: Finished difference. Result has 37 places, 26 transitions, 73 flow [2023-08-04 06:52:52,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=37, PETRI_TRANSITIONS=26} [2023-08-04 06:52:52,576 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 3 predicate places. [2023-08-04 06:52:52,576 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 26 transitions, 73 flow [2023-08-04 06:52:52,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:52:52,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:52:52,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:52:52,597 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 06:52:52,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:52:52,782 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:52:52,782 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:52:52,782 INFO L85 PathProgramCache]: Analyzing trace with hash 491415325, now seen corresponding path program 1 times [2023-08-04 06:52:52,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:52:52,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434022880] [2023-08-04 06:52:52,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:52:52,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:52:52,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:52:52,855 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 06:52:52,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:52:52,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434022880] [2023-08-04 06:52:52,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434022880] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:52:52,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248104595] [2023-08-04 06:52:52,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:52:52,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:52:52,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:52:52,862 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 06:52:52,866 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 06:52:52,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:52:52,960 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 06:52:52,961 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:52:52,970 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 06:52:52,970 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 06:52:52,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248104595] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:52:52,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 06:52:52,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 06:52:52,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106341976] [2023-08-04 06:52:52,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:52:52,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:52:52,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:52:52,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:52:52,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:52:52,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 255 [2023-08-04 06:52:52,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 26 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:52:52,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:52:52,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 255 [2023-08-04 06:52:52,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:52:53,114 INFO L124 PetriNetUnfolderBase]: 560/889 cut-off events. [2023-08-04 06:52:53,114 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-04 06:52:53,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1833 conditions, 889 events. 560/889 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4063 event pairs, 326 based on Foata normal form. 0/849 useless extension candidates. Maximal degree in co-relation 1817. Up to 749 conditions per place. [2023-08-04 06:52:53,122 INFO L140 encePairwiseOnDemand]: 252/255 looper letters, 28 selfloop transitions, 2 changer transitions 1/34 dead transitions. [2023-08-04 06:52:53,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 34 transitions, 151 flow [2023-08-04 06:52:53,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:52:53,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:52:53,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 416 transitions. [2023-08-04 06:52:53,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5437908496732026 [2023-08-04 06:52:53,124 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 416 transitions. [2023-08-04 06:52:53,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 416 transitions. [2023-08-04 06:52:53,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:52:53,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 416 transitions. [2023-08-04 06:52:53,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:52:53,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:52:53,126 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:52:53,127 INFO L175 Difference]: Start difference. First operand has 37 places, 26 transitions, 73 flow. Second operand 3 states and 416 transitions. [2023-08-04 06:52:53,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 34 transitions, 151 flow [2023-08-04 06:52:53,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 34 transitions, 147 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 06:52:53,128 INFO L231 Difference]: Finished difference. Result has 38 places, 26 transitions, 77 flow [2023-08-04 06:52:53,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=77, PETRI_PLACES=38, PETRI_TRANSITIONS=26} [2023-08-04 06:52:53,128 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 4 predicate places. [2023-08-04 06:52:53,128 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 26 transitions, 77 flow [2023-08-04 06:52:53,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:52:53,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:52:53,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:52:53,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-04 06:52:53,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-04 06:52:53,334 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:52:53,334 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:52:53,334 INFO L85 PathProgramCache]: Analyzing trace with hash -2002230029, now seen corresponding path program 1 times [2023-08-04 06:52:53,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:52:53,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027597510] [2023-08-04 06:52:53,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:52:53,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:52:53,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:52:53,404 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 06:52:53,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:52:53,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027597510] [2023-08-04 06:52:53,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027597510] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:52:53,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369740712] [2023-08-04 06:52:53,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:52:53,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:52:53,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:52:53,406 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 06:52:53,465 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 06:52:53,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:52:53,557 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 06:52:53,558 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:52:53,580 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 06:52:53,580 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 06:52:53,596 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 06:52:53,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369740712] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 06:52:53,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 06:52:53,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 06:52:53,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684408080] [2023-08-04 06:52:53,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 06:52:53,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 06:52:53,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:52:53,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 06:52:53,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:52:53,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 255 [2023-08-04 06:52:53,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 26 transitions, 77 flow. Second operand has 5 states, 5 states have (on average 131.0) internal successors, (655), 5 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:52:53,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:52:53,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 255 [2023-08-04 06:52:53,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:52:53,636 INFO L124 PetriNetUnfolderBase]: 4/16 cut-off events. [2023-08-04 06:52:53,636 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 06:52:53,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 16 events. 4/16 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 18 event pairs, 1 based on Foata normal form. 3/19 useless extension candidates. Maximal degree in co-relation 36. Up to 10 conditions per place. [2023-08-04 06:52:53,636 INFO L140 encePairwiseOnDemand]: 252/255 looper letters, 0 selfloop transitions, 0 changer transitions 10/10 dead transitions. [2023-08-04 06:52:53,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 10 transitions, 43 flow [2023-08-04 06:52:53,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 06:52:53,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 06:52:53,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 518 transitions. [2023-08-04 06:52:53,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5078431372549019 [2023-08-04 06:52:53,640 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 518 transitions. [2023-08-04 06:52:53,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 518 transitions. [2023-08-04 06:52:53,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:52:53,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 518 transitions. [2023-08-04 06:52:53,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 129.5) internal successors, (518), 4 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:52:53,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 255.0) internal successors, (1275), 5 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:52:53,643 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 255.0) internal successors, (1275), 5 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:52:53,643 INFO L175 Difference]: Start difference. First operand has 38 places, 26 transitions, 77 flow. Second operand 4 states and 518 transitions. [2023-08-04 06:52:53,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 10 transitions, 43 flow [2023-08-04 06:52:53,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 10 transitions, 41 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 06:52:53,644 INFO L231 Difference]: Finished difference. Result has 18 places, 0 transitions, 0 flow [2023-08-04 06:52:53,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=17, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=18, PETRI_TRANSITIONS=0} [2023-08-04 06:52:53,644 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -16 predicate places. [2023-08-04 06:52:53,645 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 0 transitions, 0 flow [2023-08-04 06:52:53,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 131.0) internal successors, (655), 5 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:52:53,647 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 06:52:53,663 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 06:52:53,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:52:53,852 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-04 06:52:53,854 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 06:52:53,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 147 places, 145 transitions, 305 flow [2023-08-04 06:52:53,879 INFO L124 PetriNetUnfolderBase]: 30/463 cut-off events. [2023-08-04 06:52:53,880 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:52:53,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 488 conditions, 463 events. 30/463 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1954 event pairs, 0 based on Foata normal form. 0/411 useless extension candidates. Maximal degree in co-relation 284. Up to 16 conditions per place. [2023-08-04 06:52:53,880 INFO L82 GeneralOperation]: Start removeDead. Operand has 147 places, 145 transitions, 305 flow [2023-08-04 06:52:53,881 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 121 places, 116 transitions, 247 flow [2023-08-04 06:52:53,881 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 06:52:53,881 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 121 places, 116 transitions, 247 flow [2023-08-04 06:52:53,882 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 121 places, 116 transitions, 247 flow [2023-08-04 06:52:53,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 116 transitions, 247 flow [2023-08-04 06:52:53,893 INFO L124 PetriNetUnfolderBase]: 6/231 cut-off events. [2023-08-04 06:52:53,893 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:52:53,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 256 conditions, 231 events. 6/231 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 611 event pairs, 0 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 168. Up to 8 conditions per place. [2023-08-04 06:52:53,894 INFO L119 LiptonReduction]: Number of co-enabled transitions 1160 [2023-08-04 06:52:58,069 INFO L134 LiptonReduction]: Checked pairs total: 3127 [2023-08-04 06:52:58,070 INFO L136 LiptonReduction]: Total number of compositions: 97 [2023-08-04 06:52:58,071 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 06:52:58,072 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;@50bfaf77, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 06:52:58,072 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 06:52:58,075 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 06:52:58,075 INFO L124 PetriNetUnfolderBase]: 0/21 cut-off events. [2023-08-04 06:52:58,075 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:52:58,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:52:58,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 06:52:58,076 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 06:52:58,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:52:58,076 INFO L85 PathProgramCache]: Analyzing trace with hash -56735654, now seen corresponding path program 1 times [2023-08-04 06:52:58,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:52:58,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063590503] [2023-08-04 06:52:58,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:52:58,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:52:58,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:52:58,121 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 06:52:58,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:52:58,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063590503] [2023-08-04 06:52:58,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063590503] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:52:58,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 06:52:58,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 06:52:58,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749928161] [2023-08-04 06:52:58,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:52:58,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:52:58,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:52:58,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:52:58,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 06:52:58,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 242 [2023-08-04 06:52:58,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 24 transitions, 63 flow. Second operand has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:52:58,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:52:58,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 242 [2023-08-04 06:52:58,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:52:58,206 INFO L124 PetriNetUnfolderBase]: 200/404 cut-off events. [2023-08-04 06:52:58,206 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:52:58,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 817 conditions, 404 events. 200/404 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1920 event pairs, 102 based on Foata normal form. 0/386 useless extension candidates. Maximal degree in co-relation 798. Up to 348 conditions per place. [2023-08-04 06:52:58,208 INFO L140 encePairwiseOnDemand]: 239/242 looper letters, 19 selfloop transitions, 2 changer transitions 0/27 dead transitions. [2023-08-04 06:52:58,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 27 transitions, 111 flow [2023-08-04 06:52:58,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:52:58,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:52:58,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 406 transitions. [2023-08-04 06:52:58,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.559228650137741 [2023-08-04 06:52:58,209 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 406 transitions. [2023-08-04 06:52:58,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 406 transitions. [2023-08-04 06:52:58,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:52:58,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 406 transitions. [2023-08-04 06:52:58,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 135.33333333333334) internal successors, (406), 3 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:52:58,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 242.0) internal successors, (968), 4 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:52:58,212 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 242.0) internal successors, (968), 4 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:52:58,212 INFO L175 Difference]: Start difference. First operand has 31 places, 24 transitions, 63 flow. Second operand 3 states and 406 transitions. [2023-08-04 06:52:58,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 27 transitions, 111 flow [2023-08-04 06:52:58,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 27 transitions, 111 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 06:52:58,213 INFO L231 Difference]: Finished difference. Result has 34 places, 24 transitions, 71 flow [2023-08-04 06:52:58,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=242, PETRI_DIFFERENCE_MINUEND_FLOW=63, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=71, PETRI_PLACES=34, PETRI_TRANSITIONS=24} [2023-08-04 06:52:58,213 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 3 predicate places. [2023-08-04 06:52:58,213 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 24 transitions, 71 flow [2023-08-04 06:52:58,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:52:58,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:52:58,214 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 06:52:58,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-04 06:52:58,214 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 06:52:58,214 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:52:58,214 INFO L85 PathProgramCache]: Analyzing trace with hash -54196045, now seen corresponding path program 1 times [2023-08-04 06:52:58,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:52:58,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552204267] [2023-08-04 06:52:58,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:52:58,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:52:58,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 06:52:58,225 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 06:52:58,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 06:52:58,244 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 06:52:58,244 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 06:52:58,245 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 06:52:58,245 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 06:52:58,245 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 06:52:58,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 06:52:58,245 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 06:52:58,246 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 06:52:58,246 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 06:52:58,246 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 06:52:58,289 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 06:52:58,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 167 transitions, 370 flow [2023-08-04 06:52:58,381 INFO L124 PetriNetUnfolderBase]: 93/1386 cut-off events. [2023-08-04 06:52:58,381 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 06:52:58,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1484 conditions, 1386 events. 93/1386 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9383 event pairs, 0 based on Foata normal form. 0/1227 useless extension candidates. Maximal degree in co-relation 1009. Up to 54 conditions per place. [2023-08-04 06:52:58,385 INFO L82 GeneralOperation]: Start removeDead. Operand has 175 places, 167 transitions, 370 flow [2023-08-04 06:52:58,388 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 161 places, 152 transitions, 328 flow [2023-08-04 06:52:58,388 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 06:52:58,388 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 161 places, 152 transitions, 328 flow [2023-08-04 06:52:58,389 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 161 places, 152 transitions, 328 flow [2023-08-04 06:52:58,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 152 transitions, 328 flow [2023-08-04 06:52:58,456 INFO L124 PetriNetUnfolderBase]: 66/1049 cut-off events. [2023-08-04 06:52:58,456 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-08-04 06:52:58,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1121 conditions, 1049 events. 66/1049 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 6470 event pairs, 0 based on Foata normal form. 0/944 useless extension candidates. Maximal degree in co-relation 781. Up to 54 conditions per place. [2023-08-04 06:52:58,471 INFO L119 LiptonReduction]: Number of co-enabled transitions 4296 [2023-08-04 06:53:04,981 INFO L134 LiptonReduction]: Checked pairs total: 13761 [2023-08-04 06:53:04,981 INFO L136 LiptonReduction]: Total number of compositions: 116 [2023-08-04 06:53:04,983 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 06:53:04,983 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;@50bfaf77, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 06:53:04,983 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 06:53:04,987 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 06:53:04,987 INFO L124 PetriNetUnfolderBase]: 1/27 cut-off events. [2023-08-04 06:53:04,987 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 06:53:04,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:53:04,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:53:04,987 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:53:04,987 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:53:04,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1168294950, now seen corresponding path program 1 times [2023-08-04 06:53:04,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:53:04,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519495848] [2023-08-04 06:53:04,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:53:04,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:53:05,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:53:05,024 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 06:53:05,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:53:05,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519495848] [2023-08-04 06:53:05,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519495848] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:53:05,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 06:53:05,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 06:53:05,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463424139] [2023-08-04 06:53:05,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:53:05,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:53:05,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:53:05,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:53:05,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 06:53:05,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 283 [2023-08-04 06:53:05,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 44 transitions, 112 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 06:53:05,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:53:05,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 283 [2023-08-04 06:53:05,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:53:22,776 INFO L124 PetriNetUnfolderBase]: 90780/124837 cut-off events. [2023-08-04 06:53:22,777 INFO L125 PetriNetUnfolderBase]: For 1893/1893 co-relation queries the response was YES. [2023-08-04 06:53:23,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244498 conditions, 124837 events. 90780/124837 cut-off events. For 1893/1893 co-relation queries the response was YES. Maximal size of possible extension queue 3714. Compared 873335 event pairs, 73086 based on Foata normal form. 3276/120864 useless extension candidates. Maximal degree in co-relation 69697. Up to 117322 conditions per place. [2023-08-04 06:53:23,481 INFO L140 encePairwiseOnDemand]: 279/283 looper letters, 35 selfloop transitions, 2 changer transitions 1/47 dead transitions. [2023-08-04 06:53:23,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 47 transitions, 194 flow [2023-08-04 06:53:23,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:53:23,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:53:23,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 475 transitions. [2023-08-04 06:53:23,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5594817432273262 [2023-08-04 06:53:23,484 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 475 transitions. [2023-08-04 06:53:23,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 475 transitions. [2023-08-04 06:53:23,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:53:23,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 475 transitions. [2023-08-04 06:53:23,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.33333333333334) internal successors, (475), 3 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:53:23,486 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:53:23,487 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:53:23,487 INFO L175 Difference]: Start difference. First operand has 56 places, 44 transitions, 112 flow. Second operand 3 states and 475 transitions. [2023-08-04 06:53:23,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 47 transitions, 194 flow [2023-08-04 06:53:23,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 47 transitions, 194 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 06:53:23,490 INFO L231 Difference]: Finished difference. Result has 59 places, 43 transitions, 120 flow [2023-08-04 06:53:23,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=59, PETRI_TRANSITIONS=43} [2023-08-04 06:53:23,491 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 3 predicate places. [2023-08-04 06:53:23,492 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 43 transitions, 120 flow [2023-08-04 06:53:23,492 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 06:53:23,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:53:23,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:53:23,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 06:53:23,492 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:53:23,492 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:53:23,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1409566357, now seen corresponding path program 1 times [2023-08-04 06:53:23,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:53:23,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927887954] [2023-08-04 06:53:23,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:53:23,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:53:23,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:53:23,552 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 06:53:23,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:53:23,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927887954] [2023-08-04 06:53:23,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927887954] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:53:23,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961138553] [2023-08-04 06:53:23,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:53:23,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:53:23,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:53:23,566 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 06:53:23,643 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 06:53:23,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:53:23,728 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 06:53:23,729 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:53:23,735 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 06:53:23,735 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 06:53:23,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961138553] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:53:23,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 06:53:23,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 06:53:23,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095796916] [2023-08-04 06:53:23,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:53:23,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:53:23,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:53:23,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:53:23,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:53:23,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 283 [2023-08-04 06:53:23,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 43 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:53:23,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:53:23,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 283 [2023-08-04 06:53:23,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:53:37,677 INFO L124 PetriNetUnfolderBase]: 75086/102233 cut-off events. [2023-08-04 06:53:37,677 INFO L125 PetriNetUnfolderBase]: For 1575/1575 co-relation queries the response was YES. [2023-08-04 06:53:38,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201034 conditions, 102233 events. 75086/102233 cut-off events. For 1575/1575 co-relation queries the response was YES. Maximal size of possible extension queue 3193. Compared 689909 event pairs, 60736 based on Foata normal form. 0/98836 useless extension candidates. Maximal degree in co-relation 200997. Up to 96475 conditions per place. [2023-08-04 06:53:38,421 INFO L140 encePairwiseOnDemand]: 280/283 looper letters, 40 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2023-08-04 06:53:38,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 51 transitions, 220 flow [2023-08-04 06:53:38,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:53:38,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:53:38,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 477 transitions. [2023-08-04 06:53:38,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5618374558303887 [2023-08-04 06:53:38,423 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 477 transitions. [2023-08-04 06:53:38,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 477 transitions. [2023-08-04 06:53:38,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:53:38,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 477 transitions. [2023-08-04 06:53:38,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:53:38,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:53:38,427 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:53:38,427 INFO L175 Difference]: Start difference. First operand has 59 places, 43 transitions, 120 flow. Second operand 3 states and 477 transitions. [2023-08-04 06:53:38,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 51 transitions, 220 flow [2023-08-04 06:53:38,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 51 transitions, 218 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 06:53:38,429 INFO L231 Difference]: Finished difference. Result has 60 places, 44 transitions, 130 flow [2023-08-04 06:53:38,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=60, PETRI_TRANSITIONS=44} [2023-08-04 06:53:38,430 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 4 predicate places. [2023-08-04 06:53:38,430 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 44 transitions, 130 flow [2023-08-04 06:53:38,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:53:38,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:53:38,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:53:38,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-04 06:53:38,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:53:38,637 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:53:38,638 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:53:38,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1540711338, now seen corresponding path program 1 times [2023-08-04 06:53:38,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:53:38,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324117414] [2023-08-04 06:53:38,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:53:38,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:53:38,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:53:38,711 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 06:53:38,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:53:38,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324117414] [2023-08-04 06:53:38,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324117414] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:53:38,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546897920] [2023-08-04 06:53:38,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:53:38,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:53:38,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:53:38,713 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 06:53:38,721 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 06:53:38,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:53:38,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 06:53:38,885 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:53:38,895 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 06:53:38,895 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 06:53:38,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546897920] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:53:38,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 06:53:38,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 06:53:38,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403924181] [2023-08-04 06:53:38,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:53:38,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:53:38,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:53:38,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:53:38,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:53:38,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 283 [2023-08-04 06:53:38,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 44 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:53:38,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:53:38,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 283 [2023-08-04 06:53:38,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:53:53,298 INFO L124 PetriNetUnfolderBase]: 73742/98786 cut-off events. [2023-08-04 06:53:53,298 INFO L125 PetriNetUnfolderBase]: For 977/977 co-relation queries the response was YES. [2023-08-04 06:53:53,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196001 conditions, 98786 events. 73742/98786 cut-off events. For 977/977 co-relation queries the response was YES. Maximal size of possible extension queue 3173. Compared 645659 event pairs, 57038 based on Foata normal form. 0/95326 useless extension candidates. Maximal degree in co-relation 56020. Up to 91805 conditions per place. [2023-08-04 06:53:54,038 INFO L140 encePairwiseOnDemand]: 280/283 looper letters, 46 selfloop transitions, 2 changer transitions 0/57 dead transitions. [2023-08-04 06:53:54,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 57 transitions, 252 flow [2023-08-04 06:53:54,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:53:54,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:53:54,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 482 transitions. [2023-08-04 06:53:54,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5677267373380448 [2023-08-04 06:53:54,041 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 482 transitions. [2023-08-04 06:53:54,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 482 transitions. [2023-08-04 06:53:54,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:53:54,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 482 transitions. [2023-08-04 06:53:54,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:53:54,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:53:54,044 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:53:54,045 INFO L175 Difference]: Start difference. First operand has 60 places, 44 transitions, 130 flow. Second operand 3 states and 482 transitions. [2023-08-04 06:53:54,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 57 transitions, 252 flow [2023-08-04 06:53:54,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 57 transitions, 250 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 06:53:54,048 INFO L231 Difference]: Finished difference. Result has 62 places, 45 transitions, 140 flow [2023-08-04 06:53:54,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=62, PETRI_TRANSITIONS=45} [2023-08-04 06:53:54,049 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 6 predicate places. [2023-08-04 06:53:54,049 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 45 transitions, 140 flow [2023-08-04 06:53:54,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:53:54,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:53:54,050 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 06:53:54,056 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 06:53:54,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:53:54,257 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:53:54,258 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:53:54,258 INFO L85 PathProgramCache]: Analyzing trace with hash -379410959, now seen corresponding path program 1 times [2023-08-04 06:53:54,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:53:54,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499367592] [2023-08-04 06:53:54,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:53:54,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:53:54,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:53:54,311 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 06:53:54,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:53:54,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499367592] [2023-08-04 06:53:54,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499367592] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:53:54,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761355847] [2023-08-04 06:53:54,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:53:54,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:53:54,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:53:54,313 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 06:53:54,341 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 06:53:54,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:53:54,458 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 06:53:54,460 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:53:54,472 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 06:53:54,473 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 06:53:54,486 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 06:53:54,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761355847] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 06:53:54,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 06:53:54,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 06:53:54,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479617997] [2023-08-04 06:53:54,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 06:53:54,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 06:53:54,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:53:54,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 06:53:54,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:53:54,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 283 [2023-08-04 06:53:54,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 45 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 148.0) internal successors, (740), 5 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:53:54,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:53:54,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 283 [2023-08-04 06:53:54,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:54:06,359 INFO L124 PetriNetUnfolderBase]: 57928/76769 cut-off events. [2023-08-04 06:54:06,360 INFO L125 PetriNetUnfolderBase]: For 5676/5676 co-relation queries the response was YES. [2023-08-04 06:54:06,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157154 conditions, 76769 events. 57928/76769 cut-off events. For 5676/5676 co-relation queries the response was YES. Maximal size of possible extension queue 2537. Compared 470264 event pairs, 36996 based on Foata normal form. 3/76312 useless extension candidates. Maximal degree in co-relation 55854. Up to 73594 conditions per place. [2023-08-04 06:54:06,905 INFO L140 encePairwiseOnDemand]: 279/283 looper letters, 40 selfloop transitions, 3 changer transitions 1/53 dead transitions. [2023-08-04 06:54:06,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 53 transitions, 244 flow [2023-08-04 06:54:06,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 06:54:06,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 06:54:06,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 619 transitions. [2023-08-04 06:54:06,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5468197879858657 [2023-08-04 06:54:06,907 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 619 transitions. [2023-08-04 06:54:06,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 619 transitions. [2023-08-04 06:54:06,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:54:06,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 619 transitions. [2023-08-04 06:54:06,909 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 06:54:06,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 283.0) internal successors, (1415), 5 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:54:06,910 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 283.0) internal successors, (1415), 5 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:54:06,910 INFO L175 Difference]: Start difference. First operand has 62 places, 45 transitions, 140 flow. Second operand 4 states and 619 transitions. [2023-08-04 06:54:06,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 53 transitions, 244 flow [2023-08-04 06:54:06,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 53 transitions, 242 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 06:54:06,914 INFO L231 Difference]: Finished difference. Result has 66 places, 45 transitions, 152 flow [2023-08-04 06:54:06,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=66, PETRI_TRANSITIONS=45} [2023-08-04 06:54:06,914 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 10 predicate places. [2023-08-04 06:54:06,915 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 45 transitions, 152 flow [2023-08-04 06:54:06,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 148.0) internal successors, (740), 5 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:54:06,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:54:06,915 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 06:54:06,921 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 06:54:07,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:54:07,120 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:54:07,120 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:54:07,120 INFO L85 PathProgramCache]: Analyzing trace with hash 613914189, now seen corresponding path program 1 times [2023-08-04 06:54:07,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:54:07,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239853858] [2023-08-04 06:54:07,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:54:07,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:54:07,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:54:07,173 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 06:54:07,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:54:07,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239853858] [2023-08-04 06:54:07,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239853858] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:54:07,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813390691] [2023-08-04 06:54:07,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:54:07,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:54:07,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:54:07,189 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 06:54:07,218 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 06:54:07,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:54:07,331 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 06:54:07,332 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:54:07,344 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 06:54:07,344 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 06:54:07,360 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 06:54:07,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813390691] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 06:54:07,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 06:54:07,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 06:54:07,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679819371] [2023-08-04 06:54:07,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 06:54:07,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 06:54:07,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:54:07,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 06:54:07,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:54:07,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 283 [2023-08-04 06:54:07,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 45 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 148.2) internal successors, (741), 5 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:54:07,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:54:07,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 283 [2023-08-04 06:54:07,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:54:16,123 INFO L124 PetriNetUnfolderBase]: 45550/59722 cut-off events. [2023-08-04 06:54:16,123 INFO L125 PetriNetUnfolderBase]: For 3978/3978 co-relation queries the response was YES. [2023-08-04 06:54:16,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121979 conditions, 59722 events. 45550/59722 cut-off events. For 3978/3978 co-relation queries the response was YES. Maximal size of possible extension queue 2150. Compared 352850 event pairs, 29614 based on Foata normal form. 27/59424 useless extension candidates. Maximal degree in co-relation 43271. Up to 56617 conditions per place. [2023-08-04 06:54:16,737 INFO L140 encePairwiseOnDemand]: 279/283 looper letters, 48 selfloop transitions, 3 changer transitions 1/61 dead transitions. [2023-08-04 06:54:16,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 61 transitions, 288 flow [2023-08-04 06:54:16,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 06:54:16,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 06:54:16,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 627 transitions. [2023-08-04 06:54:16,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.553886925795053 [2023-08-04 06:54:16,757 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 627 transitions. [2023-08-04 06:54:16,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 627 transitions. [2023-08-04 06:54:16,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:54:16,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 627 transitions. [2023-08-04 06:54:16,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 156.75) internal successors, (627), 4 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:54:16,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 283.0) internal successors, (1415), 5 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:54:16,777 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 283.0) internal successors, (1415), 5 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:54:16,778 INFO L175 Difference]: Start difference. First operand has 66 places, 45 transitions, 152 flow. Second operand 4 states and 627 transitions. [2023-08-04 06:54:16,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 61 transitions, 288 flow [2023-08-04 06:54:16,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 61 transitions, 281 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 06:54:16,784 INFO L231 Difference]: Finished difference. Result has 68 places, 45 transitions, 159 flow [2023-08-04 06:54:16,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=159, PETRI_PLACES=68, PETRI_TRANSITIONS=45} [2023-08-04 06:54:16,785 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 12 predicate places. [2023-08-04 06:54:16,785 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 45 transitions, 159 flow [2023-08-04 06:54:16,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 148.2) internal successors, (741), 5 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:54:16,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:54:16,785 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 06:54:16,809 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 06:54:16,986 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 06:54:16,986 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:54:16,987 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:54:16,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1046668737, now seen corresponding path program 1 times [2023-08-04 06:54:16,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:54:16,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988876467] [2023-08-04 06:54:16,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:54:16,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:54:17,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:54:17,094 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 06:54:17,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:54:17,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988876467] [2023-08-04 06:54:17,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988876467] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:54:17,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624213763] [2023-08-04 06:54:17,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:54:17,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:54:17,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:54:17,096 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 06:54:17,099 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 06:54:17,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:54:17,257 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 06:54:17,258 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:54:17,273 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 06:54:17,273 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 06:54:17,284 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 06:54:17,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624213763] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 06:54:17,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 06:54:17,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 06:54:17,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026189133] [2023-08-04 06:54:17,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 06:54:17,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 06:54:17,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:54:17,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 06:54:17,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:54:17,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 283 [2023-08-04 06:54:17,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 45 transitions, 159 flow. Second operand has 5 states, 5 states have (on average 148.4) internal successors, (742), 5 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:54:17,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:54:17,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 283 [2023-08-04 06:54:17,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:54:25,250 INFO L124 PetriNetUnfolderBase]: 40906/52666 cut-off events. [2023-08-04 06:54:25,251 INFO L125 PetriNetUnfolderBase]: For 3106/3106 co-relation queries the response was YES. [2023-08-04 06:54:25,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108883 conditions, 52666 events. 40906/52666 cut-off events. For 3106/3106 co-relation queries the response was YES. Maximal size of possible extension queue 1914. Compared 291604 event pairs, 18820 based on Foata normal form. 324/52989 useless extension candidates. Maximal degree in co-relation 38600. Up to 34339 conditions per place. [2023-08-04 06:54:25,792 INFO L140 encePairwiseOnDemand]: 279/283 looper letters, 59 selfloop transitions, 3 changer transitions 1/72 dead transitions. [2023-08-04 06:54:25,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 72 transitions, 339 flow [2023-08-04 06:54:25,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 06:54:25,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 06:54:25,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 638 transitions. [2023-08-04 06:54:25,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5636042402826855 [2023-08-04 06:54:25,794 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 638 transitions. [2023-08-04 06:54:25,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 638 transitions. [2023-08-04 06:54:25,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:54:25,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 638 transitions. [2023-08-04 06:54:25,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 159.5) internal successors, (638), 4 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:54:25,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 283.0) internal successors, (1415), 5 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:54:25,798 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 283.0) internal successors, (1415), 5 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:54:25,798 INFO L175 Difference]: Start difference. First operand has 68 places, 45 transitions, 159 flow. Second operand 4 states and 638 transitions. [2023-08-04 06:54:25,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 72 transitions, 339 flow [2023-08-04 06:54:25,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 72 transitions, 332 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 06:54:25,801 INFO L231 Difference]: Finished difference. Result has 70 places, 45 transitions, 166 flow [2023-08-04 06:54:25,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=166, PETRI_PLACES=70, PETRI_TRANSITIONS=45} [2023-08-04 06:54:25,802 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 14 predicate places. [2023-08-04 06:54:25,802 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 45 transitions, 166 flow [2023-08-04 06:54:25,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 148.4) internal successors, (742), 5 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:54:25,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:54:25,803 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 06:54:25,808 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 06:54:26,007 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 06:54:26,008 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:54:26,008 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:54:26,008 INFO L85 PathProgramCache]: Analyzing trace with hash 461995977, now seen corresponding path program 1 times [2023-08-04 06:54:26,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:54:26,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467940786] [2023-08-04 06:54:26,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:54:26,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:54:26,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:54:26,299 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 06:54:26,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:54:26,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467940786] [2023-08-04 06:54:26,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467940786] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:54:26,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 06:54:26,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 06:54:26,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103721536] [2023-08-04 06:54:26,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:54:26,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 06:54:26,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:54:26,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 06:54:26,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:54:26,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 283 [2023-08-04 06:54:26,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 45 transitions, 166 flow. Second operand has 5 states, 5 states have (on average 150.8) internal successors, (754), 5 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:54:26,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:54:26,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 283 [2023-08-04 06:54:26,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:54:34,850 INFO L124 PetriNetUnfolderBase]: 38362/52231 cut-off events. [2023-08-04 06:54:34,851 INFO L125 PetriNetUnfolderBase]: For 16210/16210 co-relation queries the response was YES. [2023-08-04 06:54:35,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110224 conditions, 52231 events. 38362/52231 cut-off events. For 16210/16210 co-relation queries the response was YES. Maximal size of possible extension queue 2006. Compared 342544 event pairs, 5826 based on Foata normal form. 1296/53379 useless extension candidates. Maximal degree in co-relation 110148. Up to 40521 conditions per place. [2023-08-04 06:54:35,216 INFO L140 encePairwiseOnDemand]: 278/283 looper letters, 63 selfloop transitions, 3 changer transitions 27/102 dead transitions. [2023-08-04 06:54:35,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 102 transitions, 536 flow [2023-08-04 06:54:35,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 06:54:35,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 06:54:35,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 824 transitions. [2023-08-04 06:54:35,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823321554770318 [2023-08-04 06:54:35,219 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 824 transitions. [2023-08-04 06:54:35,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 824 transitions. [2023-08-04 06:54:35,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:54:35,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 824 transitions. [2023-08-04 06:54:35,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 164.8) internal successors, (824), 5 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:54:35,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 283.0) internal successors, (1698), 6 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:54:35,223 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 283.0) internal successors, (1698), 6 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:54:35,223 INFO L175 Difference]: Start difference. First operand has 70 places, 45 transitions, 166 flow. Second operand 5 states and 824 transitions. [2023-08-04 06:54:35,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 102 transitions, 536 flow [2023-08-04 06:54:35,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 102 transitions, 522 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 06:54:35,230 INFO L231 Difference]: Finished difference. Result has 74 places, 47 transitions, 186 flow [2023-08-04 06:54:35,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=186, PETRI_PLACES=74, PETRI_TRANSITIONS=47} [2023-08-04 06:54:35,230 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 18 predicate places. [2023-08-04 06:54:35,230 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 47 transitions, 186 flow [2023-08-04 06:54:35,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 150.8) internal successors, (754), 5 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:54:35,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:54:35,231 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 06:54:35,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-04 06:54:35,231 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:54:35,231 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:54:35,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1436975616, now seen corresponding path program 1 times [2023-08-04 06:54:35,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:54:35,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852973132] [2023-08-04 06:54:35,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:54:35,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:54:35,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:54:35,462 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 06:54:35,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:54:35,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852973132] [2023-08-04 06:54:35,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852973132] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:54:35,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 06:54:35,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 06:54:35,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054763085] [2023-08-04 06:54:35,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:54:35,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 06:54:35,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:54:35,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 06:54:35,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 06:54:35,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 283 [2023-08-04 06:54:35,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 47 transitions, 186 flow. Second operand has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:54:35,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:54:35,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 283 [2023-08-04 06:54:35,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:54:47,466 INFO L124 PetriNetUnfolderBase]: 68712/86441 cut-off events. [2023-08-04 06:54:47,467 INFO L125 PetriNetUnfolderBase]: For 46178/46178 co-relation queries the response was YES. [2023-08-04 06:54:47,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211897 conditions, 86441 events. 68712/86441 cut-off events. For 46178/46178 co-relation queries the response was YES. Maximal size of possible extension queue 2846. Compared 458533 event pairs, 30716 based on Foata normal form. 2048/88425 useless extension candidates. Maximal degree in co-relation 186090. Up to 74798 conditions per place. [2023-08-04 06:54:48,047 INFO L140 encePairwiseOnDemand]: 278/283 looper letters, 63 selfloop transitions, 3 changer transitions 29/102 dead transitions. [2023-08-04 06:54:48,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 102 transitions, 558 flow [2023-08-04 06:54:48,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 06:54:48,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 06:54:48,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 803 transitions. [2023-08-04 06:54:48,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5674911660777385 [2023-08-04 06:54:48,049 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 803 transitions. [2023-08-04 06:54:48,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 803 transitions. [2023-08-04 06:54:48,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:54:48,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 803 transitions. [2023-08-04 06:54:48,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 160.6) internal successors, (803), 5 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:54:48,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 283.0) internal successors, (1698), 6 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:54:48,052 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 283.0) internal successors, (1698), 6 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:54:48,052 INFO L175 Difference]: Start difference. First operand has 74 places, 47 transitions, 186 flow. Second operand 5 states and 803 transitions. [2023-08-04 06:54:48,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 102 transitions, 558 flow [2023-08-04 06:54:48,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 102 transitions, 551 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 06:54:48,082 INFO L231 Difference]: Finished difference. Result has 77 places, 49 transitions, 208 flow [2023-08-04 06:54:48,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=208, PETRI_PLACES=77, PETRI_TRANSITIONS=49} [2023-08-04 06:54:48,083 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 21 predicate places. [2023-08-04 06:54:48,083 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 49 transitions, 208 flow [2023-08-04 06:54:48,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:54:48,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:54:48,083 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] [2023-08-04 06:54:48,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-04 06:54:48,084 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:54:48,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:54:48,084 INFO L85 PathProgramCache]: Analyzing trace with hash -700184080, now seen corresponding path program 1 times [2023-08-04 06:54:48,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:54:48,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259443503] [2023-08-04 06:54:48,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:54:48,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:54:48,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:54:48,234 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 06:54:48,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:54:48,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259443503] [2023-08-04 06:54:48,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259443503] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:54:48,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 06:54:48,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 06:54:48,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986383552] [2023-08-04 06:54:48,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:54:48,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 06:54:48,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:54:48,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 06:54:48,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 06:54:48,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 283 [2023-08-04 06:54:48,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 49 transitions, 208 flow. Second operand has 4 states, 4 states have (on average 148.5) internal successors, (594), 4 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:54:48,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:54:48,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 283 [2023-08-04 06:54:48,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:55:04,580 INFO L124 PetriNetUnfolderBase]: 82220/105782 cut-off events. [2023-08-04 06:55:04,581 INFO L125 PetriNetUnfolderBase]: For 87815/87815 co-relation queries the response was YES. [2023-08-04 06:55:05,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272672 conditions, 105782 events. 82220/105782 cut-off events. For 87815/87815 co-relation queries the response was YES. Maximal size of possible extension queue 3541. Compared 619444 event pairs, 41244 based on Foata normal form. 2432/108213 useless extension candidates. Maximal degree in co-relation 242447. Up to 62615 conditions per place. [2023-08-04 06:55:05,590 INFO L140 encePairwiseOnDemand]: 277/283 looper letters, 67 selfloop transitions, 6 changer transitions 33/113 dead transitions. [2023-08-04 06:55:05,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 113 transitions, 650 flow [2023-08-04 06:55:05,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 06:55:05,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 06:55:05,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 812 transitions. [2023-08-04 06:55:05,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5738515901060071 [2023-08-04 06:55:05,607 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 812 transitions. [2023-08-04 06:55:05,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 812 transitions. [2023-08-04 06:55:05,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:55:05,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 812 transitions. [2023-08-04 06:55:05,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 162.4) internal successors, (812), 5 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:55:05,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 283.0) internal successors, (1698), 6 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:55:05,610 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 283.0) internal successors, (1698), 6 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:55:05,610 INFO L175 Difference]: Start difference. First operand has 77 places, 49 transitions, 208 flow. Second operand 5 states and 812 transitions. [2023-08-04 06:55:05,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 113 transitions, 650 flow [2023-08-04 06:55:06,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 113 transitions, 643 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-04 06:55:06,271 INFO L231 Difference]: Finished difference. Result has 81 places, 53 transitions, 265 flow [2023-08-04 06:55:06,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=265, PETRI_PLACES=81, PETRI_TRANSITIONS=53} [2023-08-04 06:55:06,271 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 25 predicate places. [2023-08-04 06:55:06,271 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 53 transitions, 265 flow [2023-08-04 06:55:06,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 148.5) internal successors, (594), 4 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:55:06,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:55:06,272 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 06:55:06,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-04 06:55:06,272 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:55:06,272 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:55:06,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1384607679, now seen corresponding path program 1 times [2023-08-04 06:55:06,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:55:06,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35558232] [2023-08-04 06:55:06,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:55:06,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:55:06,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:55:06,432 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 06:55:06,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:55:06,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35558232] [2023-08-04 06:55:06,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35558232] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:55:06,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 06:55:06,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 06:55:06,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554060257] [2023-08-04 06:55:06,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:55:06,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 06:55:06,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:55:06,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 06:55:06,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 06:55:06,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 283 [2023-08-04 06:55:06,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 53 transitions, 265 flow. Second operand has 4 states, 4 states have (on average 150.25) internal successors, (601), 4 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:55:06,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:55:06,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 283 [2023-08-04 06:55:06,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:55:19,024 INFO L124 PetriNetUnfolderBase]: 56937/76557 cut-off events. [2023-08-04 06:55:19,025 INFO L125 PetriNetUnfolderBase]: For 140021/140021 co-relation queries the response was YES. [2023-08-04 06:55:19,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218466 conditions, 76557 events. 56937/76557 cut-off events. For 140021/140021 co-relation queries the response was YES. Maximal size of possible extension queue 3026. Compared 497600 event pairs, 12421 based on Foata normal form. 1808/77251 useless extension candidates. Maximal degree in co-relation 161157. Up to 59305 conditions per place. [2023-08-04 06:55:19,676 INFO L140 encePairwiseOnDemand]: 278/283 looper letters, 61 selfloop transitions, 3 changer transitions 25/100 dead transitions. [2023-08-04 06:55:19,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 100 transitions, 664 flow [2023-08-04 06:55:19,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 06:55:19,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 06:55:19,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 800 transitions. [2023-08-04 06:55:19,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5653710247349824 [2023-08-04 06:55:19,693 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 800 transitions. [2023-08-04 06:55:19,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 800 transitions. [2023-08-04 06:55:19,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:55:19,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 800 transitions. [2023-08-04 06:55:19,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 160.0) internal successors, (800), 5 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:55:19,696 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 283.0) internal successors, (1698), 6 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:55:19,696 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 283.0) internal successors, (1698), 6 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:55:19,696 INFO L175 Difference]: Start difference. First operand has 81 places, 53 transitions, 265 flow. Second operand 5 states and 800 transitions. [2023-08-04 06:55:19,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 100 transitions, 664 flow [2023-08-04 06:55:20,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 100 transitions, 618 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-08-04 06:55:20,018 INFO L231 Difference]: Finished difference. Result has 83 places, 55 transitions, 270 flow [2023-08-04 06:55:20,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=270, PETRI_PLACES=83, PETRI_TRANSITIONS=55} [2023-08-04 06:55:20,018 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 27 predicate places. [2023-08-04 06:55:20,019 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 55 transitions, 270 flow [2023-08-04 06:55:20,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 150.25) internal successors, (601), 4 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:55:20,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:55:20,019 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 06:55:20,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-04 06:55:20,019 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:55:20,020 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:55:20,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1035982021, now seen corresponding path program 1 times [2023-08-04 06:55:20,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:55:20,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908704659] [2023-08-04 06:55:20,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:55:20,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:55:20,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:55:21,411 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 06:55:21,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:55:21,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908704659] [2023-08-04 06:55:21,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908704659] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:55:21,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723278579] [2023-08-04 06:55:21,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:55:21,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:55:21,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:55:21,415 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 06:55:21,415 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 06:55:21,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:55:21,584 INFO L262 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-04 06:55:21,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:55:21,968 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2023-08-04 06:55:22,360 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 06:55:22,360 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 06:55:22,506 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 06:55:22,507 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 130 treesize of output 133 [2023-08-04 06:55:24,042 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 296 treesize of output 284 [2023-08-04 06:55:24,373 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 06:55:24,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723278579] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 06:55:24,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 06:55:24,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 3, 5] total 17 [2023-08-04 06:55:24,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140741964] [2023-08-04 06:55:24,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 06:55:24,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-04 06:55:24,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:55:24,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-04 06:55:24,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-08-04 06:55:24,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 283 [2023-08-04 06:55:24,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 55 transitions, 270 flow. Second operand has 18 states, 18 states have (on average 124.11111111111111) internal successors, (2234), 18 states have internal predecessors, (2234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:55:24,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:55:24,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 283 [2023-08-04 06:55:24,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand