/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-deagle_arithmetic_prog_bad_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 04:45:35,104 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 04:45:35,177 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 04:45:35,184 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 04:45:35,185 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 04:45:35,185 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 04:45:35,186 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 04:45:35,222 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 04:45:35,223 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 04:45:35,227 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 04:45:35,227 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 04:45:35,227 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 04:45:35,228 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 04:45:35,229 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 04:45:35,230 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 04:45:35,230 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 04:45:35,230 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 04:45:35,230 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 04:45:35,230 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 04:45:35,231 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 04:45:35,231 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 04:45:35,231 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 04:45:35,231 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 04:45:35,232 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 04:45:35,232 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 04:45:35,233 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 04:45:35,233 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 04:45:35,234 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 04:45:35,234 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 04:45:35,234 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 04:45:35,235 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 04:45:35,235 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 04:45:35,235 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 04:45:35,235 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 04:45:35,236 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 04:45:35,236 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 04:45:35,236 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 04:45:35,236 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 04:45:35,236 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 04:45:35,236 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 04:45:35,236 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 04:45:35,237 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 04:45:35,480 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 04:45:35,498 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 04:45:35,500 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 04:45:35,501 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 04:45:35,502 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 04:45:35,503 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-deagle_arithmetic_prog_bad_bound2.i [2023-08-04 04:45:36,662 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 04:45:36,926 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 04:45:36,926 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-deagle_arithmetic_prog_bad_bound2.i [2023-08-04 04:45:36,946 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48fbfc618/eca56a8263154d82900296c2fe1adbd4/FLAGc1c7cb766 [2023-08-04 04:45:36,960 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48fbfc618/eca56a8263154d82900296c2fe1adbd4 [2023-08-04 04:45:36,962 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 04:45:36,964 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 04:45:36,966 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 04:45:36,966 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 04:45:36,969 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 04:45:36,970 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 04:45:36" (1/1) ... [2023-08-04 04:45:36,971 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b7c99dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:45:36, skipping insertion in model container [2023-08-04 04:45:36,971 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 04:45:36" (1/1) ... [2023-08-04 04:45:37,022 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 04:45:37,430 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-deagle_arithmetic_prog_bad_bound2.i[39920,39933] [2023-08-04 04:45:37,432 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 04:45:37,454 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 04:45:37,483 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [218] [2023-08-04 04:45:37,485 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [219] [2023-08-04 04:45:37,502 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [730] [2023-08-04 04:45:37,507 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned long [871] [2023-08-04 04:45:37,514 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-deagle_arithmetic_prog_bad_bound2.i[39920,39933] [2023-08-04 04:45:37,516 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 04:45:37,577 INFO L206 MainTranslator]: Completed translation [2023-08-04 04:45:37,577 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:45:37 WrapperNode [2023-08-04 04:45:37,578 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 04:45:37,580 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 04:45:37,580 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 04:45:37,580 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 04:45:37,586 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:45:37" (1/1) ... [2023-08-04 04:45:37,618 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:45:37" (1/1) ... [2023-08-04 04:45:37,639 INFO L138 Inliner]: procedures = 243, calls = 50, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 113 [2023-08-04 04:45:37,640 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 04:45:37,640 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 04:45:37,640 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 04:45:37,640 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 04:45:37,649 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:45:37" (1/1) ... [2023-08-04 04:45:37,650 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:45:37" (1/1) ... [2023-08-04 04:45:37,653 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:45:37" (1/1) ... [2023-08-04 04:45:37,653 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:45:37" (1/1) ... [2023-08-04 04:45:37,679 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:45:37" (1/1) ... [2023-08-04 04:45:37,683 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:45:37" (1/1) ... [2023-08-04 04:45:37,685 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:45:37" (1/1) ... [2023-08-04 04:45:37,687 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:45:37" (1/1) ... [2023-08-04 04:45:37,690 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 04:45:37,691 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 04:45:37,691 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 04:45:37,691 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 04:45:37,691 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:45:37" (1/1) ... [2023-08-04 04:45:37,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 04:45:37,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:45:37,728 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 04:45:37,748 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 04:45:37,780 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 04:45:37,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 04:45:37,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-08-04 04:45:37,780 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 04:45:37,780 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 04:45:37,782 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 04:45:37,782 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 04:45:37,783 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 04:45:37,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 04:45:37,783 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-04 04:45:37,783 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 04:45:37,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 04:45:37,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 04:45:37,784 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 04:45:37,785 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 04:45:37,951 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 04:45:37,952 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 04:45:38,187 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 04:45:38,195 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 04:45:38,195 INFO L302 CfgBuilder]: Removed 8 assume(true) statements. [2023-08-04 04:45:38,198 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 04:45:38 BoogieIcfgContainer [2023-08-04 04:45:38,199 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 04:45:38,201 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 04:45:38,201 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 04:45:38,203 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 04:45:38,204 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 04:45:36" (1/3) ... [2023-08-04 04:45:38,206 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5592a4c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 04:45:38, skipping insertion in model container [2023-08-04 04:45:38,206 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:45:37" (2/3) ... [2023-08-04 04:45:38,206 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5592a4c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 04:45:38, skipping insertion in model container [2023-08-04 04:45:38,206 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 04:45:38" (3/3) ... [2023-08-04 04:45:38,207 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-deagle_arithmetic_prog_bad_bound2.i [2023-08-04 04:45:38,217 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 04:45:38,228 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 04:45:38,228 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 04:45:38,228 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 04:45:38,310 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 04:45:38,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 161 transitions, 344 flow [2023-08-04 04:45:38,465 INFO L124 PetriNetUnfolderBase]: 42/311 cut-off events. [2023-08-04 04:45:38,466 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 04:45:38,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 331 conditions, 311 events. 42/311 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1143 event pairs, 0 based on Foata normal form. 0/259 useless extension candidates. Maximal degree in co-relation 168. Up to 12 conditions per place. [2023-08-04 04:45:38,473 INFO L82 GeneralOperation]: Start removeDead. Operand has 148 places, 161 transitions, 344 flow [2023-08-04 04:45:38,479 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 148 places, 161 transitions, 344 flow [2023-08-04 04:45:38,482 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 04:45:38,490 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 148 places, 161 transitions, 344 flow [2023-08-04 04:45:38,493 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 148 places, 161 transitions, 344 flow [2023-08-04 04:45:38,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 161 transitions, 344 flow [2023-08-04 04:45:38,555 INFO L124 PetriNetUnfolderBase]: 42/311 cut-off events. [2023-08-04 04:45:38,556 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 04:45:38,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 331 conditions, 311 events. 42/311 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1143 event pairs, 0 based on Foata normal form. 0/259 useless extension candidates. Maximal degree in co-relation 168. Up to 12 conditions per place. [2023-08-04 04:45:38,569 INFO L119 LiptonReduction]: Number of co-enabled transitions 6348 [2023-08-04 04:45:44,051 INFO L134 LiptonReduction]: Checked pairs total: 15226 [2023-08-04 04:45:44,052 INFO L136 LiptonReduction]: Total number of compositions: 129 [2023-08-04 04:45:44,080 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 04:45:44,087 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;@633dc85d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 04:45:44,087 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 04:45:44,097 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 04:45:44,097 INFO L124 PetriNetUnfolderBase]: 1/21 cut-off events. [2023-08-04 04:45:44,097 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:45:44,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:45:44,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 04:45:44,099 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:45:44,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:45:44,104 INFO L85 PathProgramCache]: Analyzing trace with hash 869736262, now seen corresponding path program 1 times [2023-08-04 04:45:44,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:45:44,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420742141] [2023-08-04 04:45:44,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:45:44,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:45:44,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:45:44,403 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 04:45:44,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:45:44,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420742141] [2023-08-04 04:45:44,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420742141] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:45:44,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:45:44,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 04:45:44,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809740988] [2023-08-04 04:45:44,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:45:44,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:45:44,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:45:44,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:45:44,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 04:45:44,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 290 [2023-08-04 04:45:44,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 50 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:45:44,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:45:44,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 290 [2023-08-04 04:45:44,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:45:44,676 INFO L124 PetriNetUnfolderBase]: 889/1586 cut-off events. [2023-08-04 04:45:44,676 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2023-08-04 04:45:44,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2962 conditions, 1586 events. 889/1586 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 8825 event pairs, 342 based on Foata normal form. 133/1312 useless extension candidates. Maximal degree in co-relation 2627. Up to 1316 conditions per place. [2023-08-04 04:45:44,686 INFO L140 encePairwiseOnDemand]: 285/290 looper letters, 37 selfloop transitions, 2 changer transitions 5/55 dead transitions. [2023-08-04 04:45:44,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 55 transitions, 216 flow [2023-08-04 04:45:44,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:45:44,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:45:44,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 469 transitions. [2023-08-04 04:45:44,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.539080459770115 [2023-08-04 04:45:44,701 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 469 transitions. [2023-08-04 04:45:44,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 469 transitions. [2023-08-04 04:45:44,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:45:44,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 469 transitions. [2023-08-04 04:45:44,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:45:44,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:45:44,715 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:45:44,716 INFO L175 Difference]: Start difference. First operand has 44 places, 50 transitions, 122 flow. Second operand 3 states and 469 transitions. [2023-08-04 04:45:44,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 55 transitions, 216 flow [2023-08-04 04:45:44,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 55 transitions, 216 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 04:45:44,722 INFO L231 Difference]: Finished difference. Result has 47 places, 44 transitions, 114 flow [2023-08-04 04:45:44,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=47, PETRI_TRANSITIONS=44} [2023-08-04 04:45:44,726 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-08-04 04:45:44,726 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 44 transitions, 114 flow [2023-08-04 04:45:44,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:45:44,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:45:44,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:45:44,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 04:45:44,727 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:45:44,728 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:45:44,728 INFO L85 PathProgramCache]: Analyzing trace with hash 268064275, now seen corresponding path program 1 times [2023-08-04 04:45:44,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:45:44,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488567701] [2023-08-04 04:45:44,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:45:44,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:45:44,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:45:44,867 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 04:45:44,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:45:44,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488567701] [2023-08-04 04:45:44,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488567701] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:45:44,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216134131] [2023-08-04 04:45:44,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:45:44,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:45:44,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:45:44,872 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 04:45:44,877 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 04:45:44,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:45:44,951 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 04:45:44,955 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:45:44,967 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 04:45:44,968 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 04:45:44,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216134131] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:45:44,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 04:45:44,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 04:45:44,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110813123] [2023-08-04 04:45:44,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:45:44,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:45:44,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:45:44,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:45:44,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 04:45:44,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 290 [2023-08-04 04:45:44,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 44 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:45:44,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:45:44,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 290 [2023-08-04 04:45:44,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:45:45,128 INFO L124 PetriNetUnfolderBase]: 758/1236 cut-off events. [2023-08-04 04:45:45,128 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2023-08-04 04:45:45,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2447 conditions, 1236 events. 758/1236 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 5933 event pairs, 276 based on Foata normal form. 0/942 useless extension candidates. Maximal degree in co-relation 2396. Up to 1054 conditions per place. [2023-08-04 04:45:45,135 INFO L140 encePairwiseOnDemand]: 287/290 looper letters, 44 selfloop transitions, 2 changer transitions 1/58 dead transitions. [2023-08-04 04:45:45,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 58 transitions, 236 flow [2023-08-04 04:45:45,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:45:45,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:45:45,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 471 transitions. [2023-08-04 04:45:45,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5413793103448276 [2023-08-04 04:45:45,138 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 471 transitions. [2023-08-04 04:45:45,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 471 transitions. [2023-08-04 04:45:45,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:45:45,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 471 transitions. [2023-08-04 04:45:45,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:45:45,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:45:45,143 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:45:45,143 INFO L175 Difference]: Start difference. First operand has 47 places, 44 transitions, 114 flow. Second operand 3 states and 471 transitions. [2023-08-04 04:45:45,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 58 transitions, 236 flow [2023-08-04 04:45:45,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 58 transitions, 226 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 04:45:45,146 INFO L231 Difference]: Finished difference. Result has 43 places, 44 transitions, 112 flow [2023-08-04 04:45:45,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=43, PETRI_TRANSITIONS=44} [2023-08-04 04:45:45,146 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -1 predicate places. [2023-08-04 04:45:45,147 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 44 transitions, 112 flow [2023-08-04 04:45:45,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:45:45,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:45:45,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:45:45,162 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 04:45:45,357 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 04:45:45,357 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:45:45,358 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:45:45,358 INFO L85 PathProgramCache]: Analyzing trace with hash -566865060, now seen corresponding path program 1 times [2023-08-04 04:45:45,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:45:45,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108618344] [2023-08-04 04:45:45,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:45:45,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:45:45,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:45:45,465 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 04:45:45,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:45:45,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108618344] [2023-08-04 04:45:45,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108618344] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:45:45,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138623650] [2023-08-04 04:45:45,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:45:45,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:45:45,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:45:45,468 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 04:45:45,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 04:45:45,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:45:45,572 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 04:45:45,574 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:45:45,586 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 04:45:45,587 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 04:45:45,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138623650] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:45:45,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 04:45:45,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 04:45:45,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46410119] [2023-08-04 04:45:45,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:45:45,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:45:45,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:45:45,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:45:45,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 04:45:45,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 290 [2023-08-04 04:45:45,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 44 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:45:45,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:45:45,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 290 [2023-08-04 04:45:45,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:45:45,732 INFO L124 PetriNetUnfolderBase]: 450/816 cut-off events. [2023-08-04 04:45:45,732 INFO L125 PetriNetUnfolderBase]: For 70/70 co-relation queries the response was YES. [2023-08-04 04:45:45,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1661 conditions, 816 events. 450/816 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3782 event pairs, 192 based on Foata normal form. 0/684 useless extension candidates. Maximal degree in co-relation 1304. Up to 487 conditions per place. [2023-08-04 04:45:45,736 INFO L140 encePairwiseOnDemand]: 287/290 looper letters, 48 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2023-08-04 04:45:45,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 61 transitions, 250 flow [2023-08-04 04:45:45,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:45:45,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:45:45,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 474 transitions. [2023-08-04 04:45:45,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5448275862068965 [2023-08-04 04:45:45,739 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 474 transitions. [2023-08-04 04:45:45,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 474 transitions. [2023-08-04 04:45:45,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:45:45,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 474 transitions. [2023-08-04 04:45:45,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:45:45,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:45:45,743 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:45:45,743 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 112 flow. Second operand 3 states and 474 transitions. [2023-08-04 04:45:45,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 61 transitions, 250 flow [2023-08-04 04:45:45,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 61 transitions, 246 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 04:45:45,745 INFO L231 Difference]: Finished difference. Result has 44 places, 45 transitions, 120 flow [2023-08-04 04:45:45,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=41, 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=120, PETRI_PLACES=44, PETRI_TRANSITIONS=45} [2023-08-04 04:45:45,746 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2023-08-04 04:45:45,746 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 45 transitions, 120 flow [2023-08-04 04:45:45,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:45:45,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:45:45,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:45:45,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 04:45:45,953 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 04:45:45,953 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:45:45,954 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:45:45,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1135055713, now seen corresponding path program 1 times [2023-08-04 04:45:45,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:45:45,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508047081] [2023-08-04 04:45:45,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:45:45,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:45:45,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:45:46,026 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 04:45:46,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:45:46,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508047081] [2023-08-04 04:45:46,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508047081] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:45:46,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429140343] [2023-08-04 04:45:46,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:45:46,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:45:46,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:45:46,028 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 04:45:46,031 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 04:45:46,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:45:46,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 04:45:46,118 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:45:46,127 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 04:45:46,127 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 04:45:46,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429140343] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:45:46,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 04:45:46,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 04:45:46,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853697909] [2023-08-04 04:45:46,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:45:46,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:45:46,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:45:46,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:45:46,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 04:45:46,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 290 [2023-08-04 04:45:46,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 45 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:45:46,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:45:46,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 290 [2023-08-04 04:45:46,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:45:46,329 INFO L124 PetriNetUnfolderBase]: 705/1454 cut-off events. [2023-08-04 04:45:46,329 INFO L125 PetriNetUnfolderBase]: For 329/329 co-relation queries the response was YES. [2023-08-04 04:45:46,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2786 conditions, 1454 events. 705/1454 cut-off events. For 329/329 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 8386 event pairs, 300 based on Foata normal form. 0/1227 useless extension candidates. Maximal degree in co-relation 1420. Up to 713 conditions per place. [2023-08-04 04:45:46,339 INFO L140 encePairwiseOnDemand]: 287/290 looper letters, 56 selfloop transitions, 2 changer transitions 1/70 dead transitions. [2023-08-04 04:45:46,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 70 transitions, 307 flow [2023-08-04 04:45:46,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:45:46,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:45:46,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 482 transitions. [2023-08-04 04:45:46,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5540229885057472 [2023-08-04 04:45:46,346 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 482 transitions. [2023-08-04 04:45:46,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 482 transitions. [2023-08-04 04:45:46,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:45:46,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 482 transitions. [2023-08-04 04:45:46,347 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 04:45:46,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:45:46,349 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:45:46,350 INFO L175 Difference]: Start difference. First operand has 44 places, 45 transitions, 120 flow. Second operand 3 states and 482 transitions. [2023-08-04 04:45:46,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 70 transitions, 307 flow [2023-08-04 04:45:46,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 70 transitions, 303 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 04:45:46,353 INFO L231 Difference]: Finished difference. Result has 46 places, 46 transitions, 130 flow [2023-08-04 04:45:46,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=46, PETRI_TRANSITIONS=46} [2023-08-04 04:45:46,355 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 2 predicate places. [2023-08-04 04:45:46,355 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 46 transitions, 130 flow [2023-08-04 04:45:46,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:45:46,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:45:46,356 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 04:45:46,368 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 04:45:46,562 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 04:45:46,563 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:45:46,563 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:45:46,563 INFO L85 PathProgramCache]: Analyzing trace with hash -237614458, now seen corresponding path program 1 times [2023-08-04 04:45:46,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:45:46,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299146817] [2023-08-04 04:45:46,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:45:46,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:45:46,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:45:46,644 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 04:45:46,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:45:46,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299146817] [2023-08-04 04:45:46,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299146817] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:45:46,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030464186] [2023-08-04 04:45:46,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:45:46,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:45:46,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:45:46,647 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 04:45:46,650 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 04:45:46,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:45:46,742 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 04:45:46,743 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:45:46,756 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 04:45:46,756 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 04:45:46,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030464186] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:45:46,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 04:45:46,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 04:45:46,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238784106] [2023-08-04 04:45:46,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:45:46,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:45:46,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:45:46,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:45:46,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 04:45:46,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 290 [2023-08-04 04:45:46,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 46 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:45:46,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:45:46,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 290 [2023-08-04 04:45:46,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:45:46,987 INFO L124 PetriNetUnfolderBase]: 1019/2040 cut-off events. [2023-08-04 04:45:46,988 INFO L125 PetriNetUnfolderBase]: For 571/571 co-relation queries the response was YES. [2023-08-04 04:45:46,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4180 conditions, 2040 events. 1019/2040 cut-off events. For 571/571 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 11998 event pairs, 482 based on Foata normal form. 0/1850 useless extension candidates. Maximal degree in co-relation 2669. Up to 1094 conditions per place. [2023-08-04 04:45:46,999 INFO L140 encePairwiseOnDemand]: 287/290 looper letters, 53 selfloop transitions, 2 changer transitions 1/67 dead transitions. [2023-08-04 04:45:46,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 67 transitions, 305 flow [2023-08-04 04:45:46,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:45:46,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:45:47,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 477 transitions. [2023-08-04 04:45:47,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5482758620689655 [2023-08-04 04:45:47,001 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 477 transitions. [2023-08-04 04:45:47,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 477 transitions. [2023-08-04 04:45:47,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:45:47,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 477 transitions. [2023-08-04 04:45:47,002 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 04:45:47,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:45:47,005 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:45:47,005 INFO L175 Difference]: Start difference. First operand has 46 places, 46 transitions, 130 flow. Second operand 3 states and 477 transitions. [2023-08-04 04:45:47,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 67 transitions, 305 flow [2023-08-04 04:45:47,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 67 transitions, 301 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 04:45:47,007 INFO L231 Difference]: Finished difference. Result has 48 places, 47 transitions, 140 flow [2023-08-04 04:45:47,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=48, PETRI_TRANSITIONS=47} [2023-08-04 04:45:47,008 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 4 predicate places. [2023-08-04 04:45:47,008 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 47 transitions, 140 flow [2023-08-04 04:45:47,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:45:47,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:45:47,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:45:47,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 04:45:47,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:45:47,215 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:45:47,215 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:45:47,215 INFO L85 PathProgramCache]: Analyzing trace with hash 418197519, now seen corresponding path program 1 times [2023-08-04 04:45:47,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:45:47,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597934877] [2023-08-04 04:45:47,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:45:47,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:45:47,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:45:47,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 04:45:47,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:45:47,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597934877] [2023-08-04 04:45:47,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597934877] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:45:47,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706717824] [2023-08-04 04:45:47,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:45:47,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:45:47,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:45:47,298 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 04:45:47,300 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 04:45:47,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:45:47,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 04:45:47,393 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:45:47,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 04:45:47,402 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 04:45:47,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706717824] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:45:47,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 04:45:47,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 04:45:47,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464556605] [2023-08-04 04:45:47,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:45:47,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:45:47,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:45:47,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:45:47,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 04:45:47,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 290 [2023-08-04 04:45:47,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 47 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:45:47,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:45:47,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 290 [2023-08-04 04:45:47,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:45:47,614 INFO L124 PetriNetUnfolderBase]: 976/1888 cut-off events. [2023-08-04 04:45:47,614 INFO L125 PetriNetUnfolderBase]: For 597/597 co-relation queries the response was YES. [2023-08-04 04:45:47,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4114 conditions, 1888 events. 976/1888 cut-off events. For 597/597 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 10492 event pairs, 645 based on Foata normal form. 0/1764 useless extension candidates. Maximal degree in co-relation 2575. Up to 1394 conditions per place. [2023-08-04 04:45:47,626 INFO L140 encePairwiseOnDemand]: 287/290 looper letters, 48 selfloop transitions, 2 changer transitions 2/63 dead transitions. [2023-08-04 04:45:47,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 63 transitions, 294 flow [2023-08-04 04:45:47,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:45:47,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:45:47,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 471 transitions. [2023-08-04 04:45:47,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5413793103448276 [2023-08-04 04:45:47,628 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 471 transitions. [2023-08-04 04:45:47,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 471 transitions. [2023-08-04 04:45:47,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:45:47,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 471 transitions. [2023-08-04 04:45:47,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:45:47,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:45:47,632 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:45:47,632 INFO L175 Difference]: Start difference. First operand has 48 places, 47 transitions, 140 flow. Second operand 3 states and 471 transitions. [2023-08-04 04:45:47,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 63 transitions, 294 flow [2023-08-04 04:45:47,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 63 transitions, 290 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 04:45:47,638 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 142 flow [2023-08-04 04:45:47,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=50, PETRI_TRANSITIONS=46} [2023-08-04 04:45:47,640 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 6 predicate places. [2023-08-04 04:45:47,641 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 142 flow [2023-08-04 04:45:47,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:45:47,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:45:47,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:45:47,649 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 04:45:47,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:45:47,847 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:45:47,847 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:45:47,847 INFO L85 PathProgramCache]: Analyzing trace with hash -123045831, now seen corresponding path program 1 times [2023-08-04 04:45:47,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:45:47,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011920904] [2023-08-04 04:45:47,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:45:47,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:45:47,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:45:47,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 04:45:47,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:45:47,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011920904] [2023-08-04 04:45:47,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011920904] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:45:47,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461647081] [2023-08-04 04:45:47,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:45:47,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:45:47,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:45:47,931 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 04:45:47,934 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 04:45:48,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:45:48,041 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 04:45:48,044 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:45:48,089 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 04:45:48,090 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 04:45:48,126 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 04:45:48,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461647081] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 04:45:48,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 04:45:48,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 04:45:48,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470351234] [2023-08-04 04:45:48,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 04:45:48,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 04:45:48,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:45:48,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 04:45:48,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 04:45:48,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 290 [2023-08-04 04:45:48,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 142 flow. Second operand has 5 states, 5 states have (on average 146.8) internal successors, (734), 5 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:45:48,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:45:48,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 290 [2023-08-04 04:45:48,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:45:48,175 INFO L124 PetriNetUnfolderBase]: 23/57 cut-off events. [2023-08-04 04:45:48,175 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 04:45:48,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 57 events. 23/57 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 113 event pairs, 0 based on Foata normal form. 8/59 useless extension candidates. Maximal degree in co-relation 127. Up to 36 conditions per place. [2023-08-04 04:45:48,176 INFO L140 encePairwiseOnDemand]: 287/290 looper letters, 0 selfloop transitions, 0 changer transitions 23/23 dead transitions. [2023-08-04 04:45:48,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 23 transitions, 104 flow [2023-08-04 04:45:48,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 04:45:48,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 04:45:48,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 578 transitions. [2023-08-04 04:45:48,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4982758620689655 [2023-08-04 04:45:48,178 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 578 transitions. [2023-08-04 04:45:48,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 578 transitions. [2023-08-04 04:45:48,179 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:45:48,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 578 transitions. [2023-08-04 04:45:48,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 144.5) internal successors, (578), 4 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:45:48,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 290.0) internal successors, (1450), 5 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:45:48,183 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 290.0) internal successors, (1450), 5 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:45:48,184 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 142 flow. Second operand 4 states and 578 transitions. [2023-08-04 04:45:48,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 23 transitions, 104 flow [2023-08-04 04:45:48,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 23 transitions, 102 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 04:45:48,185 INFO L231 Difference]: Finished difference. Result has 25 places, 0 transitions, 0 flow [2023-08-04 04:45:48,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=25, PETRI_TRANSITIONS=0} [2023-08-04 04:45:48,186 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -19 predicate places. [2023-08-04 04:45:48,186 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 0 transitions, 0 flow [2023-08-04 04:45:48,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 146.8) internal successors, (734), 5 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:45:48,189 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 04:45:48,197 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 04:45:48,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:45:48,395 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:45:48,397 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 04:45:48,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 161 transitions, 344 flow [2023-08-04 04:45:48,427 INFO L124 PetriNetUnfolderBase]: 42/311 cut-off events. [2023-08-04 04:45:48,427 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 04:45:48,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 331 conditions, 311 events. 42/311 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1143 event pairs, 0 based on Foata normal form. 0/259 useless extension candidates. Maximal degree in co-relation 168. Up to 12 conditions per place. [2023-08-04 04:45:48,428 INFO L82 GeneralOperation]: Start removeDead. Operand has 148 places, 161 transitions, 344 flow [2023-08-04 04:45:48,430 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 148 places, 161 transitions, 344 flow [2023-08-04 04:45:48,430 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 04:45:48,430 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 148 places, 161 transitions, 344 flow [2023-08-04 04:45:48,431 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 148 places, 161 transitions, 344 flow [2023-08-04 04:45:48,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 161 transitions, 344 flow [2023-08-04 04:45:48,454 INFO L124 PetriNetUnfolderBase]: 42/311 cut-off events. [2023-08-04 04:45:48,454 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 04:45:48,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 331 conditions, 311 events. 42/311 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1143 event pairs, 0 based on Foata normal form. 0/259 useless extension candidates. Maximal degree in co-relation 168. Up to 12 conditions per place. [2023-08-04 04:45:48,460 INFO L119 LiptonReduction]: Number of co-enabled transitions 6348 [2023-08-04 04:45:53,328 INFO L134 LiptonReduction]: Checked pairs total: 15226 [2023-08-04 04:45:53,328 INFO L136 LiptonReduction]: Total number of compositions: 129 [2023-08-04 04:45:53,330 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 04:45:53,330 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;@633dc85d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 04:45:53,330 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 04:45:53,334 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 04:45:53,334 INFO L124 PetriNetUnfolderBase]: 2/32 cut-off events. [2023-08-04 04:45:53,334 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:45:53,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:45:53,335 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 04:45:53,335 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 04:45:53,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:45:53,335 INFO L85 PathProgramCache]: Analyzing trace with hash 413682282, now seen corresponding path program 1 times [2023-08-04 04:45:53,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:45:53,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202983554] [2023-08-04 04:45:53,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:45:53,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:45:53,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 04:45:53,369 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 04:45:53,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 04:45:53,406 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 04:45:53,406 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 04:45:53,406 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 04:45:53,406 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 04:45:53,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 04:45:53,407 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 04:45:53,407 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-04 04:45:53,408 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 04:45:53,408 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 04:45:53,443 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 04:45:53,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 216 transitions, 480 flow [2023-08-04 04:45:53,541 INFO L124 PetriNetUnfolderBase]: 165/939 cut-off events. [2023-08-04 04:45:53,541 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 04:45:53,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1036 conditions, 939 events. 165/939 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5090 event pairs, 2 based on Foata normal form. 0/771 useless extension candidates. Maximal degree in co-relation 568. Up to 48 conditions per place. [2023-08-04 04:45:53,549 INFO L82 GeneralOperation]: Start removeDead. Operand has 195 places, 216 transitions, 480 flow [2023-08-04 04:45:53,555 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 195 places, 216 transitions, 480 flow [2023-08-04 04:45:53,556 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 04:45:53,556 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 195 places, 216 transitions, 480 flow [2023-08-04 04:45:53,556 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 195 places, 216 transitions, 480 flow [2023-08-04 04:45:53,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 216 transitions, 480 flow [2023-08-04 04:45:53,649 INFO L124 PetriNetUnfolderBase]: 165/939 cut-off events. [2023-08-04 04:45:53,649 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 04:45:53,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1036 conditions, 939 events. 165/939 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5090 event pairs, 2 based on Foata normal form. 0/771 useless extension candidates. Maximal degree in co-relation 568. Up to 48 conditions per place. [2023-08-04 04:45:53,687 INFO L119 LiptonReduction]: Number of co-enabled transitions 18472 [2023-08-04 04:45:58,333 INFO L134 LiptonReduction]: Checked pairs total: 53976 [2023-08-04 04:45:58,333 INFO L136 LiptonReduction]: Total number of compositions: 157 [2023-08-04 04:45:58,335 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 04:45:58,335 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;@633dc85d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 04:45:58,335 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 04:45:58,338 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 04:45:58,338 INFO L124 PetriNetUnfolderBase]: 1/20 cut-off events. [2023-08-04 04:45:58,338 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:45:58,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:45:58,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 04:45:58,338 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:45:58,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:45:58,339 INFO L85 PathProgramCache]: Analyzing trace with hash 100124577, now seen corresponding path program 1 times [2023-08-04 04:45:58,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:45:58,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360235954] [2023-08-04 04:45:58,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:45:58,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:45:58,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:45:58,362 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 04:45:58,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:45:58,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360235954] [2023-08-04 04:45:58,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360235954] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:45:58,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:45:58,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 04:45:58,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324390721] [2023-08-04 04:45:58,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:45:58,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:45:58,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:45:58,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:45:58,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 04:45:58,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 373 [2023-08-04 04:45:58,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 82 transitions, 212 flow. Second operand has 3 states, 3 states have (on average 188.0) internal successors, (564), 3 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:45:58,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:45:58,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 373 [2023-08-04 04:45:58,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:46:04,528 INFO L124 PetriNetUnfolderBase]: 63602/91760 cut-off events. [2023-08-04 04:46:04,528 INFO L125 PetriNetUnfolderBase]: For 4662/4662 co-relation queries the response was YES. [2023-08-04 04:46:04,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173559 conditions, 91760 events. 63602/91760 cut-off events. For 4662/4662 co-relation queries the response was YES. Maximal size of possible extension queue 3333. Compared 669502 event pairs, 30330 based on Foata normal form. 9888/81383 useless extension candidates. Maximal degree in co-relation 39105. Up to 79004 conditions per place. [2023-08-04 04:46:05,055 INFO L140 encePairwiseOnDemand]: 366/373 looper letters, 57 selfloop transitions, 2 changer transitions 4/86 dead transitions. [2023-08-04 04:46:05,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 86 transitions, 342 flow [2023-08-04 04:46:05,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:46:05,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:46:05,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 625 transitions. [2023-08-04 04:46:05,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5585344057193923 [2023-08-04 04:46:05,059 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 625 transitions. [2023-08-04 04:46:05,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 625 transitions. [2023-08-04 04:46:05,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:46:05,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 625 transitions. [2023-08-04 04:46:05,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 208.33333333333334) internal successors, (625), 3 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:46:05,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:46:05,063 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:46:05,063 INFO L175 Difference]: Start difference. First operand has 70 places, 82 transitions, 212 flow. Second operand 3 states and 625 transitions. [2023-08-04 04:46:05,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 86 transitions, 342 flow [2023-08-04 04:46:05,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 86 transitions, 342 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 04:46:05,069 INFO L231 Difference]: Finished difference. Result has 73 places, 75 transitions, 200 flow [2023-08-04 04:46:05,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=200, PETRI_PLACES=73, PETRI_TRANSITIONS=75} [2023-08-04 04:46:05,071 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 3 predicate places. [2023-08-04 04:46:05,071 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 75 transitions, 200 flow [2023-08-04 04:46:05,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 188.0) internal successors, (564), 3 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:46:05,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:46:05,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:46:05,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 04:46:05,072 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:46:05,072 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:46:05,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1542695779, now seen corresponding path program 1 times [2023-08-04 04:46:05,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:46:05,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817700030] [2023-08-04 04:46:05,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:46:05,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:46:05,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:46:05,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:46:05,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:46:05,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817700030] [2023-08-04 04:46:05,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817700030] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:46:05,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812425786] [2023-08-04 04:46:05,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:46:05,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:46:05,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:46:05,114 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 04:46:05,116 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 04:46:05,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:46:05,213 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 04:46:05,214 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:46:05,219 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 04:46:05,219 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 04:46:05,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812425786] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:46:05,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 04:46:05,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 04:46:05,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758554145] [2023-08-04 04:46:05,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:46:05,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:46:05,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:46:05,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:46:05,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 04:46:05,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 373 [2023-08-04 04:46:05,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 75 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:46:05,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:46:05,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 373 [2023-08-04 04:46:05,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:46:09,551 INFO L124 PetriNetUnfolderBase]: 56012/78692 cut-off events. [2023-08-04 04:46:09,551 INFO L125 PetriNetUnfolderBase]: For 3905/3905 co-relation queries the response was YES. [2023-08-04 04:46:09,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151147 conditions, 78692 events. 56012/78692 cut-off events. For 3905/3905 co-relation queries the response was YES. Maximal size of possible extension queue 2917. Compared 535988 event pairs, 27168 based on Foata normal form. 0/63690 useless extension candidates. Maximal degree in co-relation 151093. Up to 69179 conditions per place. [2023-08-04 04:46:09,975 INFO L140 encePairwiseOnDemand]: 370/373 looper letters, 70 selfloop transitions, 2 changer transitions 0/95 dead transitions. [2023-08-04 04:46:09,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 95 transitions, 384 flow [2023-08-04 04:46:09,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:46:09,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:46:09,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 630 transitions. [2023-08-04 04:46:09,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5630026809651475 [2023-08-04 04:46:09,982 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 630 transitions. [2023-08-04 04:46:09,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 630 transitions. [2023-08-04 04:46:09,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:46:09,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 630 transitions. [2023-08-04 04:46:09,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 210.0) internal successors, (630), 3 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:46:09,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:46:09,992 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:46:09,992 INFO L175 Difference]: Start difference. First operand has 73 places, 75 transitions, 200 flow. Second operand 3 states and 630 transitions. [2023-08-04 04:46:09,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 95 transitions, 384 flow [2023-08-04 04:46:10,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 95 transitions, 376 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 04:46:10,008 INFO L231 Difference]: Finished difference. Result has 70 places, 76 transitions, 204 flow [2023-08-04 04:46:10,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=70, PETRI_TRANSITIONS=76} [2023-08-04 04:46:10,009 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 0 predicate places. [2023-08-04 04:46:10,009 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 76 transitions, 204 flow [2023-08-04 04:46:10,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:46:10,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:46:10,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:46:10,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-04 04:46:10,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:46:10,215 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:46:10,215 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:46:10,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1202511587, now seen corresponding path program 1 times [2023-08-04 04:46:10,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:46:10,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669133710] [2023-08-04 04:46:10,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:46:10,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:46:10,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:46:10,265 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 04:46:10,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:46:10,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669133710] [2023-08-04 04:46:10,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669133710] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:46:10,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258318879] [2023-08-04 04:46:10,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:46:10,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:46:10,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:46:10,267 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 04:46:10,270 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 04:46:10,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:46:10,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 04:46:10,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:46:10,377 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 04:46:10,377 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 04:46:10,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258318879] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:46:10,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 04:46:10,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 04:46:10,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087236267] [2023-08-04 04:46:10,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:46:10,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:46:10,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:46:10,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:46:10,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 04:46:10,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 373 [2023-08-04 04:46:10,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 76 transitions, 204 flow. Second operand has 3 states, 3 states have (on average 190.0) internal successors, (570), 3 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:46:10,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:46:10,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 373 [2023-08-04 04:46:10,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:46:13,601 INFO L124 PetriNetUnfolderBase]: 41376/57096 cut-off events. [2023-08-04 04:46:13,602 INFO L125 PetriNetUnfolderBase]: For 3396/3396 co-relation queries the response was YES. [2023-08-04 04:46:13,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113801 conditions, 57096 events. 41376/57096 cut-off events. For 3396/3396 co-relation queries the response was YES. Maximal size of possible extension queue 1621. Compared 357749 event pairs, 19358 based on Foata normal form. 0/46866 useless extension candidates. Maximal degree in co-relation 28506. Up to 37971 conditions per place. [2023-08-04 04:46:13,871 INFO L140 encePairwiseOnDemand]: 370/373 looper letters, 82 selfloop transitions, 2 changer transitions 0/107 dead transitions. [2023-08-04 04:46:13,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 107 transitions, 444 flow [2023-08-04 04:46:13,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:46:13,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:46:13,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 641 transitions. [2023-08-04 04:46:13,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5728328865058088 [2023-08-04 04:46:13,874 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 641 transitions. [2023-08-04 04:46:13,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 641 transitions. [2023-08-04 04:46:13,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:46:13,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 641 transitions. [2023-08-04 04:46:13,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 213.66666666666666) internal successors, (641), 3 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:46:13,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:46:13,878 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:46:13,878 INFO L175 Difference]: Start difference. First operand has 70 places, 76 transitions, 204 flow. Second operand 3 states and 641 transitions. [2023-08-04 04:46:13,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 107 transitions, 444 flow [2023-08-04 04:46:13,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 107 transitions, 442 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 04:46:13,882 INFO L231 Difference]: Finished difference. Result has 72 places, 77 transitions, 214 flow [2023-08-04 04:46:13,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=214, PETRI_PLACES=72, PETRI_TRANSITIONS=77} [2023-08-04 04:46:13,883 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 2 predicate places. [2023-08-04 04:46:13,883 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 77 transitions, 214 flow [2023-08-04 04:46:13,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 190.0) internal successors, (570), 3 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:46:13,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:46:13,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:46:13,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 04:46:14,089 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,SelfDestructingSolverStorable10 [2023-08-04 04:46:14,089 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:46:14,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:46:14,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1367654339, now seen corresponding path program 1 times [2023-08-04 04:46:14,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:46:14,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136822912] [2023-08-04 04:46:14,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:46:14,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:46:14,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:46:14,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 04:46:14,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:46:14,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136822912] [2023-08-04 04:46:14,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136822912] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:46:14,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:46:14,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 04:46:14,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316295281] [2023-08-04 04:46:14,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:46:14,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:46:14,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:46:14,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:46:14,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 04:46:14,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 373 [2023-08-04 04:46:14,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 77 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:46:14,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:46:14,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 373 [2023-08-04 04:46:14,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:46:19,188 INFO L124 PetriNetUnfolderBase]: 63301/92856 cut-off events. [2023-08-04 04:46:19,188 INFO L125 PetriNetUnfolderBase]: For 15987/15987 co-relation queries the response was YES. [2023-08-04 04:46:19,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183926 conditions, 92856 events. 63301/92856 cut-off events. For 15987/15987 co-relation queries the response was YES. Maximal size of possible extension queue 2658. Compared 693744 event pairs, 27426 based on Foata normal form. 0/78763 useless extension candidates. Maximal degree in co-relation 87445. Up to 52445 conditions per place. [2023-08-04 04:46:19,681 INFO L140 encePairwiseOnDemand]: 370/373 looper letters, 100 selfloop transitions, 2 changer transitions 0/125 dead transitions. [2023-08-04 04:46:19,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 125 transitions, 563 flow [2023-08-04 04:46:19,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:46:19,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:46:19,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 655 transitions. [2023-08-04 04:46:19,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853440571939231 [2023-08-04 04:46:19,684 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 655 transitions. [2023-08-04 04:46:19,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 655 transitions. [2023-08-04 04:46:19,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:46:19,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 655 transitions. [2023-08-04 04:46:19,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 218.33333333333334) internal successors, (655), 3 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 04:46:19,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:46:19,688 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:46:19,688 INFO L175 Difference]: Start difference. First operand has 72 places, 77 transitions, 214 flow. Second operand 3 states and 655 transitions. [2023-08-04 04:46:19,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 125 transitions, 563 flow [2023-08-04 04:46:20,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 125 transitions, 559 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 04:46:20,044 INFO L231 Difference]: Finished difference. Result has 74 places, 78 transitions, 224 flow [2023-08-04 04:46:20,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=224, PETRI_PLACES=74, PETRI_TRANSITIONS=78} [2023-08-04 04:46:20,046 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 4 predicate places. [2023-08-04 04:46:20,046 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 78 transitions, 224 flow [2023-08-04 04:46:20,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:46:20,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:46:20,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:46:20,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-04 04:46:20,047 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:46:20,047 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:46:20,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1115978806, now seen corresponding path program 1 times [2023-08-04 04:46:20,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:46:20,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80054633] [2023-08-04 04:46:20,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:46:20,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:46:20,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:46:20,095 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 04:46:20,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:46:20,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80054633] [2023-08-04 04:46:20,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80054633] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:46:20,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147527625] [2023-08-04 04:46:20,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:46:20,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:46:20,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:46:20,098 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 04:46:20,120 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 04:46:20,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:46:20,206 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 04:46:20,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:46:20,213 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 04:46:20,213 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 04:46:20,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147527625] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:46:20,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 04:46:20,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 04:46:20,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434071548] [2023-08-04 04:46:20,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:46:20,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:46:20,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:46:20,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:46:20,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 04:46:20,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 373 [2023-08-04 04:46:20,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 78 transitions, 224 flow. Second operand has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:46:20,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:46:20,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 373 [2023-08-04 04:46:20,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:46:28,287 INFO L124 PetriNetUnfolderBase]: 86287/138754 cut-off events. [2023-08-04 04:46:28,287 INFO L125 PetriNetUnfolderBase]: For 29092/29092 co-relation queries the response was YES. [2023-08-04 04:46:28,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272513 conditions, 138754 events. 86287/138754 cut-off events. For 29092/29092 co-relation queries the response was YES. Maximal size of possible extension queue 4084. Compared 1266890 event pairs, 42603 based on Foata normal form. 0/121428 useless extension candidates. Maximal degree in co-relation 160086. Up to 79854 conditions per place. [2023-08-04 04:46:29,207 INFO L140 encePairwiseOnDemand]: 370/373 looper letters, 95 selfloop transitions, 2 changer transitions 0/120 dead transitions. [2023-08-04 04:46:29,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 120 transitions, 544 flow [2023-08-04 04:46:29,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:46:29,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:46:29,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 649 transitions. [2023-08-04 04:46:29,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.579982126899017 [2023-08-04 04:46:29,210 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 649 transitions. [2023-08-04 04:46:29,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 649 transitions. [2023-08-04 04:46:29,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:46:29,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 649 transitions. [2023-08-04 04:46:29,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 216.33333333333334) internal successors, (649), 3 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:46:29,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:46:29,214 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:46:29,214 INFO L175 Difference]: Start difference. First operand has 74 places, 78 transitions, 224 flow. Second operand 3 states and 649 transitions. [2023-08-04 04:46:29,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 120 transitions, 544 flow [2023-08-04 04:46:29,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 120 transitions, 540 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 04:46:29,281 INFO L231 Difference]: Finished difference. Result has 76 places, 79 transitions, 234 flow [2023-08-04 04:46:29,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=234, PETRI_PLACES=76, PETRI_TRANSITIONS=79} [2023-08-04 04:46:29,281 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 6 predicate places. [2023-08-04 04:46:29,281 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 79 transitions, 234 flow [2023-08-04 04:46:29,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:46:29,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:46:29,282 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, 1] [2023-08-04 04:46:29,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-04 04:46:29,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 04:46:29,492 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:46:29,492 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:46:29,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1395950847, now seen corresponding path program 1 times [2023-08-04 04:46:29,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:46:29,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563012323] [2023-08-04 04:46:29,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:46:29,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:46:29,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:46:29,552 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 04:46:29,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:46:29,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563012323] [2023-08-04 04:46:29,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563012323] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:46:29,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:46:29,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 04:46:29,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766684823] [2023-08-04 04:46:29,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:46:29,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:46:29,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:46:29,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:46:29,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 04:46:29,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 373 [2023-08-04 04:46:29,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 79 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:46:29,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:46:29,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 373 [2023-08-04 04:46:29,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:46:41,065 INFO L124 PetriNetUnfolderBase]: 127582/183524 cut-off events. [2023-08-04 04:46:41,065 INFO L125 PetriNetUnfolderBase]: For 58795/58795 co-relation queries the response was YES. [2023-08-04 04:46:41,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 395023 conditions, 183524 events. 127582/183524 cut-off events. For 58795/58795 co-relation queries the response was YES. Maximal size of possible extension queue 4711. Compared 1426848 event pairs, 58079 based on Foata normal form. 0/165318 useless extension candidates. Maximal degree in co-relation 239308. Up to 108212 conditions per place. [2023-08-04 04:46:42,007 INFO L140 encePairwiseOnDemand]: 370/373 looper letters, 101 selfloop transitions, 2 changer transitions 1/127 dead transitions. [2023-08-04 04:46:42,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 127 transitions, 599 flow [2023-08-04 04:46:42,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:46:42,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:46:42,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 654 transitions. [2023-08-04 04:46:42,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5844504021447721 [2023-08-04 04:46:42,009 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 654 transitions. [2023-08-04 04:46:42,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 654 transitions. [2023-08-04 04:46:42,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:46:42,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 654 transitions. [2023-08-04 04:46:42,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 218.0) internal successors, (654), 3 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:46:42,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:46:42,013 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:46:42,013 INFO L175 Difference]: Start difference. First operand has 76 places, 79 transitions, 234 flow. Second operand 3 states and 654 transitions. [2023-08-04 04:46:42,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 127 transitions, 599 flow [2023-08-04 04:46:42,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 127 transitions, 595 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 04:46:42,137 INFO L231 Difference]: Finished difference. Result has 78 places, 80 transitions, 244 flow [2023-08-04 04:46:42,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=244, PETRI_PLACES=78, PETRI_TRANSITIONS=80} [2023-08-04 04:46:42,139 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 8 predicate places. [2023-08-04 04:46:42,140 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 80 transitions, 244 flow [2023-08-04 04:46:42,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:46:42,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:46:42,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:46:42,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-04 04:46:42,140 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:46:42,141 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:46:42,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1805492830, now seen corresponding path program 1 times [2023-08-04 04:46:42,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:46:42,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027568857] [2023-08-04 04:46:42,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:46:42,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:46:42,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:46:42,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 04:46:42,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:46:42,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027568857] [2023-08-04 04:46:42,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027568857] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:46:42,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410716809] [2023-08-04 04:46:42,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:46:42,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:46:42,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:46:42,209 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 04:46:42,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 04:46:42,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:46:42,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 04:46:42,322 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:46:42,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 04:46:42,330 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 04:46:42,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410716809] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:46:42,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 04:46:42,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 04:46:42,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692008360] [2023-08-04 04:46:42,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:46:42,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:46:42,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:46:42,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:46:42,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 04:46:42,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 373 [2023-08-04 04:46:42,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 80 transitions, 244 flow. Second operand has 3 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:46:42,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:46:42,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 373 [2023-08-04 04:46:42,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:46:52,687 INFO L124 PetriNetUnfolderBase]: 117811/162304 cut-off events. [2023-08-04 04:46:52,687 INFO L125 PetriNetUnfolderBase]: For 64190/64190 co-relation queries the response was YES. [2023-08-04 04:46:53,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 370737 conditions, 162304 events. 117811/162304 cut-off events. For 64190/64190 co-relation queries the response was YES. Maximal size of possible extension queue 4026. Compared 1126679 event pairs, 70910 based on Foata normal form. 0/152288 useless extension candidates. Maximal degree in co-relation 224121. Up to 129041 conditions per place. [2023-08-04 04:46:53,757 INFO L140 encePairwiseOnDemand]: 370/373 looper letters, 89 selfloop transitions, 2 changer transitions 0/114 dead transitions. [2023-08-04 04:46:53,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 114 transitions, 530 flow [2023-08-04 04:46:53,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:46:53,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:46:53,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 641 transitions. [2023-08-04 04:46:53,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5728328865058088 [2023-08-04 04:46:53,763 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 641 transitions. [2023-08-04 04:46:53,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 641 transitions. [2023-08-04 04:46:53,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:46:53,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 641 transitions. [2023-08-04 04:46:53,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 213.66666666666666) internal successors, (641), 3 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:46:53,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:46:53,769 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:46:53,769 INFO L175 Difference]: Start difference. First operand has 78 places, 80 transitions, 244 flow. Second operand 3 states and 641 transitions. [2023-08-04 04:46:53,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 114 transitions, 530 flow [2023-08-04 04:46:53,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 114 transitions, 526 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 04:46:53,918 INFO L231 Difference]: Finished difference. Result has 80 places, 81 transitions, 254 flow [2023-08-04 04:46:53,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=254, PETRI_PLACES=80, PETRI_TRANSITIONS=81} [2023-08-04 04:46:53,919 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 10 predicate places. [2023-08-04 04:46:53,919 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 81 transitions, 254 flow [2023-08-04 04:46:53,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:46:53,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:46:53,919 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:46:53,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 04:46:54,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-04 04:46:54,129 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:46:54,129 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:46:54,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1258425701, now seen corresponding path program 1 times [2023-08-04 04:46:54,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:46:54,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794042029] [2023-08-04 04:46:54,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:46:54,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:46:54,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:46:54,199 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 04:46:54,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:46:54,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794042029] [2023-08-04 04:46:54,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794042029] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:46:54,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077855357] [2023-08-04 04:46:54,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:46:54,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:46:54,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:46:54,201 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 04:46:54,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 04:46:54,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:46:54,317 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 04:46:54,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:46:54,326 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 04:46:54,326 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 04:46:54,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077855357] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:46:54,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 04:46:54,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 04:46:54,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497766210] [2023-08-04 04:46:54,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:46:54,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:46:54,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:46:54,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:46:54,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 04:46:54,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 373 [2023-08-04 04:46:54,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 81 transitions, 254 flow. Second operand has 3 states, 3 states have (on average 195.0) internal successors, (585), 3 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:46:54,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:46:54,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 373 [2023-08-04 04:46:54,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:47:10,317 INFO L124 PetriNetUnfolderBase]: 166284/244318 cut-off events. [2023-08-04 04:47:10,317 INFO L125 PetriNetUnfolderBase]: For 89414/89414 co-relation queries the response was YES. [2023-08-04 04:47:10,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 534217 conditions, 244318 events. 166284/244318 cut-off events. For 89414/89414 co-relation queries the response was YES. Maximal size of possible extension queue 5692. Compared 2010044 event pairs, 80406 based on Foata normal form. 0/231305 useless extension candidates. Maximal degree in co-relation 457539. Up to 147085 conditions per place. [2023-08-04 04:47:11,986 INFO L140 encePairwiseOnDemand]: 370/373 looper letters, 98 selfloop transitions, 2 changer transitions 1/124 dead transitions. [2023-08-04 04:47:11,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 124 transitions, 604 flow [2023-08-04 04:47:11,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:47:11,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:47:11,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 648 transitions. [2023-08-04 04:47:11,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.579088471849866 [2023-08-04 04:47:11,989 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 648 transitions. [2023-08-04 04:47:11,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 648 transitions. [2023-08-04 04:47:11,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:47:11,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 648 transitions. [2023-08-04 04:47:11,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 216.0) internal successors, (648), 3 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:47:11,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:47:11,993 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:47:11,993 INFO L175 Difference]: Start difference. First operand has 80 places, 81 transitions, 254 flow. Second operand 3 states and 648 transitions. [2023-08-04 04:47:11,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 124 transitions, 604 flow [2023-08-04 04:47:13,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 124 transitions, 600 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 04:47:13,723 INFO L231 Difference]: Finished difference. Result has 82 places, 82 transitions, 264 flow [2023-08-04 04:47:13,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=264, PETRI_PLACES=82, PETRI_TRANSITIONS=82} [2023-08-04 04:47:13,724 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 12 predicate places. [2023-08-04 04:47:13,724 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 82 transitions, 264 flow [2023-08-04 04:47:13,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 195.0) internal successors, (585), 3 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:47:13,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:47:13,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:47:13,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-04 04:47:13,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-04 04:47:13,925 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:47:13,926 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:47:13,926 INFO L85 PathProgramCache]: Analyzing trace with hash -480583759, now seen corresponding path program 1 times [2023-08-04 04:47:13,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:47:13,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940741423] [2023-08-04 04:47:13,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:47:13,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:47:13,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:47:13,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 04:47:13,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:47:13,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940741423] [2023-08-04 04:47:13,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940741423] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:47:13,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488859749] [2023-08-04 04:47:13,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:47:13,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:47:13,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:47:13,983 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 04:47:13,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-04 04:47:14,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:47:14,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 04:47:14,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:47:14,121 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 04:47:14,122 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 04:47:14,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 04:47:14,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488859749] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 04:47:14,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 04:47:14,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 04:47:14,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623746891] [2023-08-04 04:47:14,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 04:47:14,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 04:47:14,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:47:14,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 04:47:14,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 04:47:14,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 373 [2023-08-04 04:47:14,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 82 transitions, 264 flow. Second operand has 5 states, 5 states have (on average 191.4) internal successors, (957), 5 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:47:14,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:47:14,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 373 [2023-08-04 04:47:14,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:47:29,799 INFO L124 PetriNetUnfolderBase]: 156019/217570 cut-off events. [2023-08-04 04:47:29,799 INFO L125 PetriNetUnfolderBase]: For 90002/90002 co-relation queries the response was YES. [2023-08-04 04:47:30,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 505360 conditions, 217570 events. 156019/217570 cut-off events. For 90002/90002 co-relation queries the response was YES. Maximal size of possible extension queue 5099. Compared 1595940 event pairs, 66653 based on Foata normal form. 8/210306 useless extension candidates. Maximal degree in co-relation 429022. Up to 192854 conditions per place. [2023-08-04 04:47:31,577 INFO L140 encePairwiseOnDemand]: 369/373 looper letters, 78 selfloop transitions, 3 changer transitions 1/105 dead transitions. [2023-08-04 04:47:31,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 105 transitions, 498 flow [2023-08-04 04:47:31,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 04:47:31,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 04:47:31,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 813 transitions. [2023-08-04 04:47:31,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5449061662198391 [2023-08-04 04:47:31,594 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 813 transitions. [2023-08-04 04:47:31,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 813 transitions. [2023-08-04 04:47:31,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:47:31,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 813 transitions. [2023-08-04 04:47:31,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 203.25) internal successors, (813), 4 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:47:31,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 373.0) internal successors, (1865), 5 states have internal predecessors, (1865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:47:31,598 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 373.0) internal successors, (1865), 5 states have internal predecessors, (1865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:47:31,598 INFO L175 Difference]: Start difference. First operand has 82 places, 82 transitions, 264 flow. Second operand 4 states and 813 transitions. [2023-08-04 04:47:31,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 105 transitions, 498 flow [2023-08-04 04:47:33,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 105 transitions, 496 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 04:47:33,809 INFO L231 Difference]: Finished difference. Result has 86 places, 82 transitions, 276 flow [2023-08-04 04:47:33,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=276, PETRI_PLACES=86, PETRI_TRANSITIONS=82} [2023-08-04 04:47:33,810 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 16 predicate places. [2023-08-04 04:47:33,810 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 82 transitions, 276 flow [2023-08-04 04:47:33,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 191.4) internal successors, (957), 5 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:47:33,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:47:33,810 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:47:33,819 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-04 04:47:34,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-04 04:47:34,015 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:47:34,016 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:47:34,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1134455882, now seen corresponding path program 1 times [2023-08-04 04:47:34,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:47:34,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928486838] [2023-08-04 04:47:34,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:47:34,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:47:34,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:47:34,078 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 04:47:34,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:47:34,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928486838] [2023-08-04 04:47:34,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928486838] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:47:34,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932721065] [2023-08-04 04:47:34,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:47:34,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:47:34,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:47:34,081 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 04:47:34,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-04 04:47:34,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:47:34,240 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 04:47:34,241 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:47:34,299 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 04:47:34,299 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 04:47:34,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932721065] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:47:34,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 04:47:34,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 04:47:34,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195314406] [2023-08-04 04:47:34,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:47:34,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:47:34,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:47:34,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:47:34,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 04:47:34,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 373 [2023-08-04 04:47:34,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 82 transitions, 276 flow. Second operand has 3 states, 3 states have (on average 194.66666666666666) internal successors, (584), 3 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:47:34,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:47:34,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 373 [2023-08-04 04:47:34,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:47:49,002 INFO L124 PetriNetUnfolderBase]: 156627/217169 cut-off events. [2023-08-04 04:47:49,002 INFO L125 PetriNetUnfolderBase]: For 85590/85590 co-relation queries the response was YES. [2023-08-04 04:47:49,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 503186 conditions, 217169 events. 156627/217169 cut-off events. For 85590/85590 co-relation queries the response was YES. Maximal size of possible extension queue 5005. Compared 1572676 event pairs, 67541 based on Foata normal form. 54/210397 useless extension candidates. Maximal degree in co-relation 426214. Up to 122477 conditions per place. [2023-08-04 04:47:50,287 INFO L140 encePairwiseOnDemand]: 369/373 looper letters, 100 selfloop transitions, 3 changer transitions 0/126 dead transitions. [2023-08-04 04:47:50,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 126 transitions, 634 flow [2023-08-04 04:47:50,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:47:50,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:47:50,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 645 transitions. [2023-08-04 04:47:50,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5764075067024129 [2023-08-04 04:47:50,288 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 645 transitions. [2023-08-04 04:47:50,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 645 transitions. [2023-08-04 04:47:50,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:47:50,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 645 transitions. [2023-08-04 04:47:50,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 215.0) internal successors, (645), 3 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:47:50,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:47:50,292 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 373.0) internal successors, (1492), 4 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:47:50,292 INFO L175 Difference]: Start difference. First operand has 86 places, 82 transitions, 276 flow. Second operand 3 states and 645 transitions. [2023-08-04 04:47:50,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 126 transitions, 634 flow [2023-08-04 04:47:52,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 126 transitions, 623 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 04:47:52,059 INFO L231 Difference]: Finished difference. Result has 86 places, 84 transitions, 286 flow [2023-08-04 04:47:52,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=286, PETRI_PLACES=86, PETRI_TRANSITIONS=84} [2023-08-04 04:47:52,059 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 16 predicate places. [2023-08-04 04:47:52,060 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 84 transitions, 286 flow [2023-08-04 04:47:52,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 194.66666666666666) internal successors, (584), 3 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:47:52,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:47:52,060 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:47:52,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-04 04:47:52,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-04 04:47:52,271 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:47:52,272 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:47:52,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1716764892, now seen corresponding path program 1 times [2023-08-04 04:47:52,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:47:52,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450461656] [2023-08-04 04:47:52,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:47:52,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:47:52,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:47:52,374 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 04:47:52,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:47:52,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450461656] [2023-08-04 04:47:52,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450461656] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:47:52,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386922789] [2023-08-04 04:47:52,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:47:52,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:47:52,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:47:52,377 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 04:47:52,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-04 04:47:52,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:47:52,514 INFO L262 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 04:47:52,515 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:47:52,530 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 04:47:52,530 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 04:47:52,549 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 04:47:52,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386922789] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 04:47:52,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 04:47:52,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2023-08-04 04:47:52,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114741021] [2023-08-04 04:47:52,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 04:47:52,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-04 04:47:52,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:47:52,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-04 04:47:52,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-04 04:47:52,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 373 [2023-08-04 04:47:52,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 84 transitions, 286 flow. Second operand has 6 states, 6 states have (on average 192.33333333333334) internal successors, (1154), 6 states have internal predecessors, (1154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:47:52,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:47:52,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 373 [2023-08-04 04:47:52,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:48:17,557 INFO L124 PetriNetUnfolderBase]: 227127/338558 cut-off events. [2023-08-04 04:48:17,557 INFO L125 PetriNetUnfolderBase]: For 133122/133122 co-relation queries the response was YES. [2023-08-04 04:48:18,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 767056 conditions, 338558 events. 227127/338558 cut-off events. For 133122/133122 co-relation queries the response was YES. Maximal size of possible extension queue 7077. Compared 2960182 event pairs, 44158 based on Foata normal form. 8160/330045 useless extension candidates. Maximal degree in co-relation 656451. Up to 78510 conditions per place. [2023-08-04 04:48:19,947 INFO L140 encePairwiseOnDemand]: 369/373 looper letters, 214 selfloop transitions, 5 changer transitions 0/242 dead transitions. [2023-08-04 04:48:19,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 242 transitions, 1327 flow [2023-08-04 04:48:19,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 04:48:19,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 04:48:19,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1110 transitions. [2023-08-04 04:48:19,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5951742627345844 [2023-08-04 04:48:19,950 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1110 transitions. [2023-08-04 04:48:19,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1110 transitions. [2023-08-04 04:48:19,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:48:19,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1110 transitions. [2023-08-04 04:48:19,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 222.0) internal successors, (1110), 5 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:48:19,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 373.0) internal successors, (2238), 6 states have internal predecessors, (2238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:48:19,955 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 373.0) internal successors, (2238), 6 states have internal predecessors, (2238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:48:19,955 INFO L175 Difference]: Start difference. First operand has 86 places, 84 transitions, 286 flow. Second operand 5 states and 1110 transitions. [2023-08-04 04:48:19,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 242 transitions, 1327 flow [2023-08-04 04:48:21,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 242 transitions, 1318 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 04:48:21,166 INFO L231 Difference]: Finished difference. Result has 92 places, 86 transitions, 313 flow [2023-08-04 04:48:21,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=313, PETRI_PLACES=92, PETRI_TRANSITIONS=86} [2023-08-04 04:48:21,166 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 22 predicate places. [2023-08-04 04:48:21,166 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 86 transitions, 313 flow [2023-08-04 04:48:21,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 192.33333333333334) internal successors, (1154), 6 states have internal predecessors, (1154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:48:21,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:48:21,167 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:48:21,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-04 04:48:21,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:48:21,368 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:48:21,368 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:48:21,368 INFO L85 PathProgramCache]: Analyzing trace with hash -316747039, now seen corresponding path program 1 times [2023-08-04 04:48:21,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:48:21,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321076571] [2023-08-04 04:48:21,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:48:21,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:48:21,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:48:21,437 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 04:48:21,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:48:21,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321076571] [2023-08-04 04:48:21,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321076571] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:48:21,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468573781] [2023-08-04 04:48:21,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:48:21,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:48:21,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:48:21,439 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 04:48:21,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-04 04:48:21,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:48:21,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 04:48:21,566 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:48:21,586 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 04:48:21,586 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 04:48:21,607 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 04:48:21,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468573781] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 04:48:21,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 04:48:21,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2023-08-04 04:48:21,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192927478] [2023-08-04 04:48:21,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 04:48:21,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-04 04:48:21,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:48:21,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-04 04:48:21,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-04 04:48:21,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 373 [2023-08-04 04:48:21,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 86 transitions, 313 flow. Second operand has 6 states, 6 states have (on average 188.0) internal successors, (1128), 6 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:48:21,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:48:21,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 373 [2023-08-04 04:48:21,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:48:57,967 INFO L124 PetriNetUnfolderBase]: 295761/416957 cut-off events. [2023-08-04 04:48:57,967 INFO L125 PetriNetUnfolderBase]: For 306396/306396 co-relation queries the response was YES. [2023-08-04 04:49:00,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1030120 conditions, 416957 events. 295761/416957 cut-off events. For 306396/306396 co-relation queries the response was YES. Maximal size of possible extension queue 8035. Compared 3336452 event pairs, 42907 based on Foata normal form. 6570/407401 useless extension candidates. Maximal degree in co-relation 892621. Up to 131206 conditions per place. [2023-08-04 04:49:02,088 INFO L140 encePairwiseOnDemand]: 366/373 looper letters, 307 selfloop transitions, 18 changer transitions 3/351 dead transitions. [2023-08-04 04:49:02,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 351 transitions, 2055 flow [2023-08-04 04:49:02,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-04 04:49:02,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-04 04:49:02,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2083 transitions. [2023-08-04 04:49:02,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5584450402144772 [2023-08-04 04:49:02,093 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2083 transitions. [2023-08-04 04:49:02,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2083 transitions. [2023-08-04 04:49:02,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:49:02,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2083 transitions. [2023-08-04 04:49:02,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 208.3) internal successors, (2083), 10 states have internal predecessors, (2083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:49:02,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 373.0) internal successors, (4103), 11 states have internal predecessors, (4103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:49:02,102 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 373.0) internal successors, (4103), 11 states have internal predecessors, (4103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:49:02,102 INFO L175 Difference]: Start difference. First operand has 92 places, 86 transitions, 313 flow. Second operand 10 states and 2083 transitions. [2023-08-04 04:49:02,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 351 transitions, 2055 flow [2023-08-04 04:49:08,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 351 transitions, 2001 flow, removed 18 selfloop flow, removed 1 redundant places. [2023-08-04 04:49:08,186 INFO L231 Difference]: Finished difference. Result has 107 places, 99 transitions, 455 flow [2023-08-04 04:49:08,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=373, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=455, PETRI_PLACES=107, PETRI_TRANSITIONS=99} [2023-08-04 04:49:08,186 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 37 predicate places. [2023-08-04 04:49:08,186 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 99 transitions, 455 flow [2023-08-04 04:49:08,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 188.0) internal successors, (1128), 6 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:49:08,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:49:08,187 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:49:08,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-04 04:49:08,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:49:08,387 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:49:08,388 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:49:08,388 INFO L85 PathProgramCache]: Analyzing trace with hash 57361257, now seen corresponding path program 1 times [2023-08-04 04:49:08,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:49:08,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404228219] [2023-08-04 04:49:08,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:49:08,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:49:08,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:49:08,424 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 04:49:08,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:49:08,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404228219] [2023-08-04 04:49:08,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404228219] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:49:08,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:49:08,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 04:49:08,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624233577] [2023-08-04 04:49:08,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:49:08,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:49:08,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:49:08,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:49:08,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 04:49:08,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 373 [2023-08-04 04:49:08,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 99 transitions, 455 flow. Second operand has 3 states, 3 states have (on average 190.0) internal successors, (570), 3 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:49:08,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:49:08,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 373 [2023-08-04 04:49:08,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand