/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/weaver_chl-word-symm.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 08:35:42,412 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 08:35:42,468 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 08:35:42,471 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 08:35:42,471 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 08:35:42,472 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 08:35:42,472 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 08:35:42,489 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 08:35:42,490 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 08:35:42,490 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 08:35:42,490 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 08:35:42,491 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 08:35:42,491 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 08:35:42,491 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 08:35:42,491 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 08:35:42,492 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 08:35:42,492 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 08:35:42,492 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 08:35:42,492 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 08:35:42,493 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 08:35:42,493 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 08:35:42,493 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 08:35:42,494 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 08:35:42,494 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 08:35:42,494 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 08:35:42,494 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 08:35:42,495 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 08:35:42,495 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 08:35:42,495 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 08:35:42,495 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 08:35:42,496 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:35:42,496 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 08:35:42,496 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 08:35:42,496 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 08:35:42,497 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 08:35:42,497 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 08:35:42,497 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 08:35:42,497 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 08:35:42,497 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 08:35:42,497 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 08:35:42,498 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 08:35:42,498 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 08:35:42,645 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 08:35:42,667 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 08:35:42,668 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 08:35:42,669 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 08:35:42,669 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 08:35:42,671 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-word-symm.wvr_bound2.c [2023-08-04 08:35:43,832 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 08:35:43,967 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 08:35:43,968 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-word-symm.wvr_bound2.c [2023-08-04 08:35:43,979 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73d4224cd/7961712134b14d589bf6e758044c903c/FLAGb5fe3eb02 [2023-08-04 08:35:43,993 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73d4224cd/7961712134b14d589bf6e758044c903c [2023-08-04 08:35:43,997 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 08:35:44,000 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 08:35:44,002 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 08:35:44,002 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 08:35:44,005 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 08:35:44,005 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:35:43" (1/1) ... [2023-08-04 08:35:44,006 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7493d586 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:35:44, skipping insertion in model container [2023-08-04 08:35:44,006 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:35:43" (1/1) ... [2023-08-04 08:35:44,031 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 08:35:44,177 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-word-symm.wvr_bound2.c[3010,3023] [2023-08-04 08:35:44,183 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:35:44,194 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 08:35:44,216 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-word-symm.wvr_bound2.c[3010,3023] [2023-08-04 08:35:44,219 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:35:44,231 INFO L206 MainTranslator]: Completed translation [2023-08-04 08:35:44,232 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:35:44 WrapperNode [2023-08-04 08:35:44,232 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 08:35:44,233 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 08:35:44,233 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 08:35:44,233 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 08:35:44,238 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:35:44" (1/1) ... [2023-08-04 08:35:44,245 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:35:44" (1/1) ... [2023-08-04 08:35:44,264 INFO L138 Inliner]: procedures = 24, calls = 35, calls flagged for inlining = 9, calls inlined = 11, statements flattened = 166 [2023-08-04 08:35:44,265 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 08:35:44,265 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 08:35:44,265 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 08:35:44,265 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 08:35:44,273 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:35:44" (1/1) ... [2023-08-04 08:35:44,273 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:35:44" (1/1) ... [2023-08-04 08:35:44,276 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:35:44" (1/1) ... [2023-08-04 08:35:44,276 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:35:44" (1/1) ... [2023-08-04 08:35:44,283 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:35:44" (1/1) ... [2023-08-04 08:35:44,286 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:35:44" (1/1) ... [2023-08-04 08:35:44,288 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:35:44" (1/1) ... [2023-08-04 08:35:44,289 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:35:44" (1/1) ... [2023-08-04 08:35:44,291 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 08:35:44,292 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 08:35:44,292 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 08:35:44,292 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 08:35:44,293 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:35:44" (1/1) ... [2023-08-04 08:35:44,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:35:44,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:35:44,318 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 08:35:44,323 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 08:35:44,345 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 08:35:44,346 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 08:35:44,346 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 08:35:44,346 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 08:35:44,346 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 08:35:44,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 08:35:44,346 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 08:35:44,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 08:35:44,346 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 08:35:44,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 08:35:44,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 08:35:44,347 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 08:35:44,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 08:35:44,348 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 08:35:44,435 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 08:35:44,436 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 08:35:44,771 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 08:35:44,779 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 08:35:44,779 INFO L302 CfgBuilder]: Removed 8 assume(true) statements. [2023-08-04 08:35:44,781 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:35:44 BoogieIcfgContainer [2023-08-04 08:35:44,781 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 08:35:44,782 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 08:35:44,782 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 08:35:44,787 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 08:35:44,787 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 08:35:43" (1/3) ... [2023-08-04 08:35:44,788 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6247adbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:35:44, skipping insertion in model container [2023-08-04 08:35:44,788 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:35:44" (2/3) ... [2023-08-04 08:35:44,788 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6247adbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:35:44, skipping insertion in model container [2023-08-04 08:35:44,788 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:35:44" (3/3) ... [2023-08-04 08:35:44,789 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_chl-word-symm.wvr_bound2.c [2023-08-04 08:35:44,795 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 08:35:44,801 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 08:35:44,803 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 08:35:44,803 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 08:35:44,898 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 08:35:44,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 219 places, 243 transitions, 508 flow [2023-08-04 08:35:45,063 INFO L124 PetriNetUnfolderBase]: 57/439 cut-off events. [2023-08-04 08:35:45,064 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 08:35:45,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 459 conditions, 439 events. 57/439 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1530 event pairs, 0 based on Foata normal form. 0/372 useless extension candidates. Maximal degree in co-relation 260. Up to 8 conditions per place. [2023-08-04 08:35:45,074 INFO L82 GeneralOperation]: Start removeDead. Operand has 219 places, 243 transitions, 508 flow [2023-08-04 08:35:45,085 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 219 places, 243 transitions, 508 flow [2023-08-04 08:35:45,090 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:35:45,098 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 219 places, 243 transitions, 508 flow [2023-08-04 08:35:45,100 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 219 places, 243 transitions, 508 flow [2023-08-04 08:35:45,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 219 places, 243 transitions, 508 flow [2023-08-04 08:35:45,164 INFO L124 PetriNetUnfolderBase]: 57/439 cut-off events. [2023-08-04 08:35:45,164 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 08:35:45,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 459 conditions, 439 events. 57/439 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1530 event pairs, 0 based on Foata normal form. 0/372 useless extension candidates. Maximal degree in co-relation 260. Up to 8 conditions per place. [2023-08-04 08:35:45,177 INFO L119 LiptonReduction]: Number of co-enabled transitions 9840 [2023-08-04 08:35:50,223 INFO L134 LiptonReduction]: Checked pairs total: 16810 [2023-08-04 08:35:50,223 INFO L136 LiptonReduction]: Total number of compositions: 238 [2023-08-04 08:35:50,241 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:35:50,249 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;@15e3c293, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:35:50,249 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:35:50,256 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:35:50,256 INFO L124 PetriNetUnfolderBase]: 6/30 cut-off events. [2023-08-04 08:35:50,256 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:35:50,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:35:50,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:35:50,257 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:35:50,260 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:35:50,261 INFO L85 PathProgramCache]: Analyzing trace with hash 26190464, now seen corresponding path program 1 times [2023-08-04 08:35:50,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:35:50,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800526035] [2023-08-04 08:35:50,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:35:50,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:35:50,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:35:50,502 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 08:35:50,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:35:50,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800526035] [2023-08-04 08:35:50,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800526035] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:35:50,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:35:50,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:35:50,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347182501] [2023-08-04 08:35:50,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:35:50,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:35:50,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:35:50,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:35:50,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:35:50,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 481 [2023-08-04 08:35:50,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 52 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 219.66666666666666) internal successors, (659), 3 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:35:50,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:35:50,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 481 [2023-08-04 08:35:50,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:35:50,736 INFO L124 PetriNetUnfolderBase]: 1589/2456 cut-off events. [2023-08-04 08:35:50,737 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-04 08:35:50,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4853 conditions, 2456 events. 1589/2456 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 11528 event pairs, 480 based on Foata normal form. 0/1724 useless extension candidates. Maximal degree in co-relation 4422. Up to 2306 conditions per place. [2023-08-04 08:35:50,747 INFO L140 encePairwiseOnDemand]: 476/481 looper letters, 51 selfloop transitions, 2 changer transitions 3/60 dead transitions. [2023-08-04 08:35:50,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 60 transitions, 250 flow [2023-08-04 08:35:50,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:35:50,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:35:50,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 708 transitions. [2023-08-04 08:35:50,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49064449064449067 [2023-08-04 08:35:50,759 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 708 transitions. [2023-08-04 08:35:50,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 708 transitions. [2023-08-04 08:35:50,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:35:50,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 708 transitions. [2023-08-04 08:35:50,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 236.0) internal successors, (708), 3 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:35:50,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 481.0) internal successors, (1924), 4 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:35:50,771 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 481.0) internal successors, (1924), 4 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:35:50,772 INFO L175 Difference]: Start difference. First operand has 44 places, 52 transitions, 126 flow. Second operand 3 states and 708 transitions. [2023-08-04 08:35:50,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 60 transitions, 250 flow [2023-08-04 08:35:50,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 60 transitions, 250 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:35:50,777 INFO L231 Difference]: Finished difference. Result has 46 places, 48 transitions, 122 flow [2023-08-04 08:35:50,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=481, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=46, PETRI_TRANSITIONS=48} [2023-08-04 08:35:50,797 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 2 predicate places. [2023-08-04 08:35:50,798 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 48 transitions, 122 flow [2023-08-04 08:35:50,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 219.66666666666666) internal successors, (659), 3 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:35:50,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:35:50,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:35:50,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 08:35:50,799 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:35:50,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:35:50,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1087074182, now seen corresponding path program 1 times [2023-08-04 08:35:50,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:35:50,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097969949] [2023-08-04 08:35:50,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:35:50,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:35:50,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:35:50,852 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 08:35:50,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:35:50,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097969949] [2023-08-04 08:35:50,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097969949] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:35:50,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192410944] [2023-08-04 08:35:50,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:35:50,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:35:50,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:35:50,855 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 08:35:50,886 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 08:35:50,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:35:50,927 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:35:50,930 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:35:50,939 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 08:35:50,939 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:35:50,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192410944] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:35:50,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:35:50,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:35:50,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006139324] [2023-08-04 08:35:50,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:35:50,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:35:50,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:35:50,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:35:50,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:35:50,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 481 [2023-08-04 08:35:50,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 48 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 221.33333333333334) internal successors, (664), 3 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:35:50,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:35:50,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 481 [2023-08-04 08:35:50,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:35:51,175 INFO L124 PetriNetUnfolderBase]: 1582/2354 cut-off events. [2023-08-04 08:35:51,176 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2023-08-04 08:35:51,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4740 conditions, 2354 events. 1582/2354 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 10344 event pairs, 566 based on Foata normal form. 0/1639 useless extension candidates. Maximal degree in co-relation 4670. Up to 2146 conditions per place. [2023-08-04 08:35:51,186 INFO L140 encePairwiseOnDemand]: 478/481 looper letters, 60 selfloop transitions, 2 changer transitions 1/67 dead transitions. [2023-08-04 08:35:51,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 67 transitions, 286 flow [2023-08-04 08:35:51,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:35:51,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:35:51,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 715 transitions. [2023-08-04 08:35:51,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4954954954954955 [2023-08-04 08:35:51,190 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 715 transitions. [2023-08-04 08:35:51,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 715 transitions. [2023-08-04 08:35:51,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:35:51,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 715 transitions. [2023-08-04 08:35:51,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 238.33333333333334) internal successors, (715), 3 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:35:51,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 481.0) internal successors, (1924), 4 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:35:51,202 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 481.0) internal successors, (1924), 4 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:35:51,202 INFO L175 Difference]: Start difference. First operand has 46 places, 48 transitions, 122 flow. Second operand 3 states and 715 transitions. [2023-08-04 08:35:51,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 67 transitions, 286 flow [2023-08-04 08:35:51,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 67 transitions, 276 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 08:35:51,205 INFO L231 Difference]: Finished difference. Result has 43 places, 48 transitions, 120 flow [2023-08-04 08:35:51,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=481, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=40, 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=120, PETRI_PLACES=43, PETRI_TRANSITIONS=48} [2023-08-04 08:35:51,205 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -1 predicate places. [2023-08-04 08:35:51,206 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 48 transitions, 120 flow [2023-08-04 08:35:51,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 221.33333333333334) internal successors, (664), 3 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:35:51,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:35:51,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:35:51,216 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 08:35:51,413 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 08:35:51,414 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:35:51,415 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:35:51,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1070323781, now seen corresponding path program 1 times [2023-08-04 08:35:51,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:35:51,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498909044] [2023-08-04 08:35:51,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:35:51,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:35:51,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:35:51,502 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 08:35:51,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:35:51,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498909044] [2023-08-04 08:35:51,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498909044] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:35:51,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667977573] [2023-08-04 08:35:51,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:35:51,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:35:51,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:35:51,516 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 08:35:51,525 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 08:35:51,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:35:51,594 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:35:51,596 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:35:51,606 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 08:35:51,606 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:35:51,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667977573] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:35:51,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:35:51,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:35:51,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039772593] [2023-08-04 08:35:51,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:35:51,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:35:51,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:35:51,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:35:51,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:35:51,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 481 [2023-08-04 08:35:51,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 48 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 222.33333333333334) internal successors, (667), 3 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:35:51,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:35:51,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 481 [2023-08-04 08:35:51,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:35:51,744 INFO L124 PetriNetUnfolderBase]: 794/1258 cut-off events. [2023-08-04 08:35:51,744 INFO L125 PetriNetUnfolderBase]: For 112/112 co-relation queries the response was YES. [2023-08-04 08:35:51,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2673 conditions, 1258 events. 794/1258 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 5183 event pairs, 330 based on Foata normal form. 0/945 useless extension candidates. Maximal degree in co-relation 1622. Up to 833 conditions per place. [2023-08-04 08:35:51,748 INFO L140 encePairwiseOnDemand]: 478/481 looper letters, 64 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2023-08-04 08:35:51,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 70 transitions, 300 flow [2023-08-04 08:35:51,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:35:51,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:35:51,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 718 transitions. [2023-08-04 08:35:51,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49757449757449757 [2023-08-04 08:35:51,750 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 718 transitions. [2023-08-04 08:35:51,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 718 transitions. [2023-08-04 08:35:51,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:35:51,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 718 transitions. [2023-08-04 08:35:51,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 239.33333333333334) internal successors, (718), 3 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:35:51,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 481.0) internal successors, (1924), 4 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:35:51,755 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 481.0) internal successors, (1924), 4 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:35:51,755 INFO L175 Difference]: Start difference. First operand has 43 places, 48 transitions, 120 flow. Second operand 3 states and 718 transitions. [2023-08-04 08:35:51,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 70 transitions, 300 flow [2023-08-04 08:35:51,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 70 transitions, 296 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:35:51,757 INFO L231 Difference]: Finished difference. Result has 44 places, 49 transitions, 128 flow [2023-08-04 08:35:51,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=481, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=44, PETRI_TRANSITIONS=49} [2023-08-04 08:35:51,757 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2023-08-04 08:35:51,757 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 49 transitions, 128 flow [2023-08-04 08:35:51,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 222.33333333333334) internal successors, (667), 3 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:35:51,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:35:51,758 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 08:35:51,779 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 08:35:51,963 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 08:35:51,963 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:35:51,964 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:35:51,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1871239445, now seen corresponding path program 1 times [2023-08-04 08:35:51,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:35:51,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935734241] [2023-08-04 08:35:51,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:35:51,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:35:51,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:35:52,046 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 08:35:52,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:35:52,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935734241] [2023-08-04 08:35:52,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935734241] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:35:52,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284161220] [2023-08-04 08:35:52,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:35:52,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:35:52,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:35:52,049 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 08:35:52,051 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 08:35:52,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:35:52,115 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:35:52,116 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:35:52,122 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:35:52,122 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:35:52,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284161220] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:35:52,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:35:52,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:35:52,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626645346] [2023-08-04 08:35:52,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:35:52,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:35:52,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:35:52,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:35:52,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:35:52,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 481 [2023-08-04 08:35:52,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 49 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 223.66666666666666) internal successors, (671), 3 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:35:52,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:35:52,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 481 [2023-08-04 08:35:52,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:35:52,243 INFO L124 PetriNetUnfolderBase]: 721/1144 cut-off events. [2023-08-04 08:35:52,243 INFO L125 PetriNetUnfolderBase]: For 227/227 co-relation queries the response was YES. [2023-08-04 08:35:52,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2470 conditions, 1144 events. 721/1144 cut-off events. For 227/227 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 4604 event pairs, 439 based on Foata normal form. 0/883 useless extension candidates. Maximal degree in co-relation 1551. Up to 1020 conditions per place. [2023-08-04 08:35:52,247 INFO L140 encePairwiseOnDemand]: 478/481 looper letters, 60 selfloop transitions, 2 changer transitions 2/68 dead transitions. [2023-08-04 08:35:52,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 68 transitions, 294 flow [2023-08-04 08:35:52,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:35:52,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:35:52,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 715 transitions. [2023-08-04 08:35:52,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4954954954954955 [2023-08-04 08:35:52,249 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 715 transitions. [2023-08-04 08:35:52,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 715 transitions. [2023-08-04 08:35:52,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:35:52,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 715 transitions. [2023-08-04 08:35:52,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 238.33333333333334) internal successors, (715), 3 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:35:52,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 481.0) internal successors, (1924), 4 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:35:52,253 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 481.0) internal successors, (1924), 4 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:35:52,253 INFO L175 Difference]: Start difference. First operand has 44 places, 49 transitions, 128 flow. Second operand 3 states and 715 transitions. [2023-08-04 08:35:52,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 68 transitions, 294 flow [2023-08-04 08:35:52,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 68 transitions, 292 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:35:52,255 INFO L231 Difference]: Finished difference. Result has 46 places, 48 transitions, 130 flow [2023-08-04 08:35:52,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=481, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=46, PETRI_TRANSITIONS=48} [2023-08-04 08:35:52,256 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 2 predicate places. [2023-08-04 08:35:52,256 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 48 transitions, 130 flow [2023-08-04 08:35:52,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 223.66666666666666) internal successors, (671), 3 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:35:52,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:35:52,256 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] [2023-08-04 08:35:52,267 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 08:35:52,461 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 08:35:52,461 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:35:52,462 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:35:52,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1825465189, now seen corresponding path program 1 times [2023-08-04 08:35:52,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:35:52,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952540431] [2023-08-04 08:35:52,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:35:52,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:35:52,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:35:52,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:35:52,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:35:52,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952540431] [2023-08-04 08:35:52,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952540431] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:35:52,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749105299] [2023-08-04 08:35:52,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:35:52,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:35:52,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:35:52,502 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 08:35:52,504 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 08:35:52,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:35:52,568 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:35:52,569 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:35:52,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:35:52,590 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:35:52,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:35:52,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749105299] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:35:52,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:35:52,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:35:52,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763694285] [2023-08-04 08:35:52,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:35:52,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:35:52,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:35:52,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:35:52,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:35:52,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 481 [2023-08-04 08:35:52,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 48 transitions, 130 flow. Second operand has 5 states, 5 states have (on average 221.6) internal successors, (1108), 5 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:35:52,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:35:52,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 481 [2023-08-04 08:35:52,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:35:52,651 INFO L124 PetriNetUnfolderBase]: 23/49 cut-off events. [2023-08-04 08:35:52,651 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:35:52,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 49 events. 23/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 85 event pairs, 0 based on Foata normal form. 7/46 useless extension candidates. Maximal degree in co-relation 105. Up to 32 conditions per place. [2023-08-04 08:35:52,652 INFO L140 encePairwiseOnDemand]: 478/481 looper letters, 0 selfloop transitions, 0 changer transitions 28/28 dead transitions. [2023-08-04 08:35:52,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 28 transitions, 114 flow [2023-08-04 08:35:52,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:35:52,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:35:52,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 892 transitions. [2023-08-04 08:35:52,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46361746361746364 [2023-08-04 08:35:52,653 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 892 transitions. [2023-08-04 08:35:52,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 892 transitions. [2023-08-04 08:35:52,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:35:52,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 892 transitions. [2023-08-04 08:35:52,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 223.0) internal successors, (892), 4 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:35:52,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 481.0) internal successors, (2405), 5 states have internal predecessors, (2405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:35:52,658 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 481.0) internal successors, (2405), 5 states have internal predecessors, (2405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:35:52,658 INFO L175 Difference]: Start difference. First operand has 46 places, 48 transitions, 130 flow. Second operand 4 states and 892 transitions. [2023-08-04 08:35:52,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 28 transitions, 114 flow [2023-08-04 08:35:52,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 28 transitions, 112 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:35:52,659 INFO L231 Difference]: Finished difference. Result has 23 places, 0 transitions, 0 flow [2023-08-04 08:35:52,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=481, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=23, PETRI_TRANSITIONS=0} [2023-08-04 08:35:52,659 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -21 predicate places. [2023-08-04 08:35:52,659 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 0 transitions, 0 flow [2023-08-04 08:35:52,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 221.6) internal successors, (1108), 5 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:35:52,662 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 08:35:52,677 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-04 08:35:52,867 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 08:35:52,867 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-04 08:35:52,869 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 08:35:52,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 219 places, 243 transitions, 508 flow [2023-08-04 08:35:52,894 INFO L124 PetriNetUnfolderBase]: 57/439 cut-off events. [2023-08-04 08:35:52,895 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 08:35:52,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 459 conditions, 439 events. 57/439 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1530 event pairs, 0 based on Foata normal form. 0/372 useless extension candidates. Maximal degree in co-relation 260. Up to 8 conditions per place. [2023-08-04 08:35:52,896 INFO L82 GeneralOperation]: Start removeDead. Operand has 219 places, 243 transitions, 508 flow [2023-08-04 08:35:52,897 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 219 places, 243 transitions, 508 flow [2023-08-04 08:35:52,897 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:35:52,897 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 219 places, 243 transitions, 508 flow [2023-08-04 08:35:52,897 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 219 places, 243 transitions, 508 flow [2023-08-04 08:35:52,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 219 places, 243 transitions, 508 flow [2023-08-04 08:35:52,920 INFO L124 PetriNetUnfolderBase]: 57/439 cut-off events. [2023-08-04 08:35:52,920 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 08:35:52,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 459 conditions, 439 events. 57/439 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1530 event pairs, 0 based on Foata normal form. 0/372 useless extension candidates. Maximal degree in co-relation 260. Up to 8 conditions per place. [2023-08-04 08:35:52,926 INFO L119 LiptonReduction]: Number of co-enabled transitions 9840 [2023-08-04 08:35:58,085 INFO L134 LiptonReduction]: Checked pairs total: 18165 [2023-08-04 08:35:58,085 INFO L136 LiptonReduction]: Total number of compositions: 245 [2023-08-04 08:35:58,087 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 08:35:58,091 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;@15e3c293, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:35:58,091 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 08:35:58,095 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:35:58,095 INFO L124 PetriNetUnfolderBase]: 7/39 cut-off events. [2023-08-04 08:35:58,095 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:35:58,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:35:58,095 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-04 08:35:58,095 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 08:35:58,095 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:35:58,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1166576419, now seen corresponding path program 1 times [2023-08-04 08:35:58,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:35:58,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141947194] [2023-08-04 08:35:58,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:35:58,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:35:58,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:35:58,138 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 08:35:58,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:35:58,181 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 08:35:58,181 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 08:35:58,183 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 08:35:58,183 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 08:35:58,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 08:35:58,184 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 08:35:58,185 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-04 08:35:58,185 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 08:35:58,185 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 08:35:58,217 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 08:35:58,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 275 places, 309 transitions, 666 flow [2023-08-04 08:35:58,362 INFO L124 PetriNetUnfolderBase]: 197/1258 cut-off events. [2023-08-04 08:35:58,362 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 08:35:58,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1355 conditions, 1258 events. 197/1258 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 6929 event pairs, 1 based on Foata normal form. 0/1058 useless extension candidates. Maximal degree in co-relation 763. Up to 32 conditions per place. [2023-08-04 08:35:58,372 INFO L82 GeneralOperation]: Start removeDead. Operand has 275 places, 309 transitions, 666 flow [2023-08-04 08:35:58,380 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 275 places, 309 transitions, 666 flow [2023-08-04 08:35:58,380 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:35:58,381 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 275 places, 309 transitions, 666 flow [2023-08-04 08:35:58,381 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 275 places, 309 transitions, 666 flow [2023-08-04 08:35:58,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 275 places, 309 transitions, 666 flow [2023-08-04 08:35:58,520 INFO L124 PetriNetUnfolderBase]: 197/1258 cut-off events. [2023-08-04 08:35:58,520 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 08:35:58,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1355 conditions, 1258 events. 197/1258 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 6929 event pairs, 1 based on Foata normal form. 0/1058 useless extension candidates. Maximal degree in co-relation 763. Up to 32 conditions per place. [2023-08-04 08:35:58,568 INFO L119 LiptonReduction]: Number of co-enabled transitions 28080 [2023-08-04 08:36:03,923 INFO L134 LiptonReduction]: Checked pairs total: 54345 [2023-08-04 08:36:03,923 INFO L136 LiptonReduction]: Total number of compositions: 288 [2023-08-04 08:36:03,925 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:36:03,925 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;@15e3c293, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:36:03,925 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:36:03,928 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:36:03,928 INFO L124 PetriNetUnfolderBase]: 6/29 cut-off events. [2023-08-04 08:36:03,928 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:36:03,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:36:03,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:36:03,928 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:36:03,928 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:36:03,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1730595890, now seen corresponding path program 1 times [2023-08-04 08:36:03,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:36:03,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461562584] [2023-08-04 08:36:03,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:36:03,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:36:03,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:36:03,961 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 08:36:03,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:36:03,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461562584] [2023-08-04 08:36:03,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461562584] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:36:03,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:36:03,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:36:03,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634139416] [2023-08-04 08:36:03,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:36:03,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:36:03,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:36:03,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:36:03,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:36:03,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 597 [2023-08-04 08:36:03,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 80 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 277.6666666666667) internal successors, (833), 3 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:36:03,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:36:03,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 597 [2023-08-04 08:36:03,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:36:15,481 INFO L124 PetriNetUnfolderBase]: 158903/201559 cut-off events. [2023-08-04 08:36:15,481 INFO L125 PetriNetUnfolderBase]: For 8720/8720 co-relation queries the response was YES. [2023-08-04 08:36:15,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 400384 conditions, 201559 events. 158903/201559 cut-off events. For 8720/8720 co-relation queries the response was YES. Maximal size of possible extension queue 5178. Compared 1148751 event pairs, 79894 based on Foata normal form. 0/136370 useless extension candidates. Maximal degree in co-relation 79476. Up to 193881 conditions per place. [2023-08-04 08:36:16,641 INFO L140 encePairwiseOnDemand]: 592/597 looper letters, 74 selfloop transitions, 2 changer transitions 2/88 dead transitions. [2023-08-04 08:36:16,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 88 transitions, 376 flow [2023-08-04 08:36:16,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:36:16,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:36:16,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 904 transitions. [2023-08-04 08:36:16,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5047459519821329 [2023-08-04 08:36:16,644 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 904 transitions. [2023-08-04 08:36:16,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 904 transitions. [2023-08-04 08:36:16,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:36:16,645 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 904 transitions. [2023-08-04 08:36:16,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 301.3333333333333) internal successors, (904), 3 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:36:16,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 597.0) internal successors, (2388), 4 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:36:16,650 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 597.0) internal successors, (2388), 4 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:36:16,650 INFO L175 Difference]: Start difference. First operand has 66 places, 80 transitions, 208 flow. Second operand 3 states and 904 transitions. [2023-08-04 08:36:16,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 88 transitions, 376 flow [2023-08-04 08:36:16,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 88 transitions, 376 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:36:16,655 INFO L231 Difference]: Finished difference. Result has 68 places, 77 transitions, 204 flow [2023-08-04 08:36:16,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=597, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=65, 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=204, PETRI_PLACES=68, PETRI_TRANSITIONS=77} [2023-08-04 08:36:16,656 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 2 predicate places. [2023-08-04 08:36:16,656 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 77 transitions, 204 flow [2023-08-04 08:36:16,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 277.6666666666667) internal successors, (833), 3 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:36:16,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:36:16,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:36:16,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 08:36:16,657 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:36:16,657 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:36:16,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1169542564, now seen corresponding path program 1 times [2023-08-04 08:36:16,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:36:16,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175532358] [2023-08-04 08:36:16,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:36:16,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:36:16,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:36:16,692 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 08:36:16,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:36:16,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175532358] [2023-08-04 08:36:16,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175532358] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:36:16,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688786161] [2023-08-04 08:36:16,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:36:16,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:36:16,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:36:16,694 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 08:36:16,696 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 08:36:16,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:36:16,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:36:16,767 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:36:16,771 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 08:36:16,772 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:36:16,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688786161] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:36:16,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:36:16,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:36:16,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152710088] [2023-08-04 08:36:16,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:36:16,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:36:16,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:36:16,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:36:16,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:36:16,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 597 [2023-08-04 08:36:16,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 77 transitions, 204 flow. Second operand has 3 states, 3 states have (on average 279.3333333333333) internal successors, (838), 3 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:36:16,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:36:16,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 597 [2023-08-04 08:36:16,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:36:28,174 INFO L124 PetriNetUnfolderBase]: 158855/200578 cut-off events. [2023-08-04 08:36:28,174 INFO L125 PetriNetUnfolderBase]: For 7386/7386 co-relation queries the response was YES. [2023-08-04 08:36:28,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 398872 conditions, 200578 events. 158855/200578 cut-off events. For 7386/7386 co-relation queries the response was YES. Maximal size of possible extension queue 5219. Compared 1126393 event pairs, 79595 based on Foata normal form. 0/135551 useless extension candidates. Maximal degree in co-relation 398804. Up to 192372 conditions per place. [2023-08-04 08:36:29,430 INFO L140 encePairwiseOnDemand]: 594/597 looper letters, 92 selfloop transitions, 2 changer transitions 0/104 dead transitions. [2023-08-04 08:36:29,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 104 transitions, 446 flow [2023-08-04 08:36:29,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:36:29,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:36:29,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 919 transitions. [2023-08-04 08:36:29,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5131211613623674 [2023-08-04 08:36:29,434 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 919 transitions. [2023-08-04 08:36:29,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 919 transitions. [2023-08-04 08:36:29,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:36:29,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 919 transitions. [2023-08-04 08:36:29,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 306.3333333333333) internal successors, (919), 3 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:36:29,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 597.0) internal successors, (2388), 4 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:36:29,440 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 597.0) internal successors, (2388), 4 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:36:29,440 INFO L175 Difference]: Start difference. First operand has 68 places, 77 transitions, 204 flow. Second operand 3 states and 919 transitions. [2023-08-04 08:36:29,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 104 transitions, 446 flow [2023-08-04 08:36:29,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 104 transitions, 438 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 08:36:29,463 INFO L231 Difference]: Finished difference. Result has 66 places, 78 transitions, 208 flow [2023-08-04 08:36:29,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=597, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=63, 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=208, PETRI_PLACES=66, PETRI_TRANSITIONS=78} [2023-08-04 08:36:29,464 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 0 predicate places. [2023-08-04 08:36:29,464 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 78 transitions, 208 flow [2023-08-04 08:36:29,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 279.3333333333333) internal successors, (838), 3 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:36:29,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:36:29,465 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 08:36:29,471 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 08:36:29,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:36:29,671 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:36:29,671 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:36:29,672 INFO L85 PathProgramCache]: Analyzing trace with hash 908764175, now seen corresponding path program 1 times [2023-08-04 08:36:29,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:36:29,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487674115] [2023-08-04 08:36:29,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:36:29,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:36:29,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:36:29,726 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 08:36:29,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:36:29,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487674115] [2023-08-04 08:36:29,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487674115] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:36:29,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316097560] [2023-08-04 08:36:29,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:36:29,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:36:29,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:36:29,745 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 08:36:29,757 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 08:36:29,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:36:29,818 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:36:29,819 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:36:29,827 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 08:36:29,828 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:36:29,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316097560] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:36:29,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:36:29,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:36:29,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16506161] [2023-08-04 08:36:29,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:36:29,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:36:29,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:36:29,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:36:29,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:36:29,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 597 [2023-08-04 08:36:29,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 78 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 280.3333333333333) internal successors, (841), 3 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:36:29,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:36:29,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 597 [2023-08-04 08:36:29,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:36:36,552 INFO L124 PetriNetUnfolderBase]: 102475/130692 cut-off events. [2023-08-04 08:36:36,553 INFO L125 PetriNetUnfolderBase]: For 6849/6849 co-relation queries the response was YES. [2023-08-04 08:36:36,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266031 conditions, 130692 events. 102475/130692 cut-off events. For 6849/6849 co-relation queries the response was YES. Maximal size of possible extension queue 3283. Compared 734746 event pairs, 46919 based on Foata normal form. 0/90744 useless extension candidates. Maximal degree in co-relation 62940. Up to 93636 conditions per place. [2023-08-04 08:36:37,300 INFO L140 encePairwiseOnDemand]: 594/597 looper letters, 106 selfloop transitions, 2 changer transitions 0/118 dead transitions. [2023-08-04 08:36:37,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 118 transitions, 514 flow [2023-08-04 08:36:37,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:36:37,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:36:37,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 932 transitions. [2023-08-04 08:36:37,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5203796761585706 [2023-08-04 08:36:37,303 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 932 transitions. [2023-08-04 08:36:37,303 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 932 transitions. [2023-08-04 08:36:37,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:36:37,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 932 transitions. [2023-08-04 08:36:37,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 310.6666666666667) internal successors, (932), 3 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:36:37,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 597.0) internal successors, (2388), 4 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:36:37,307 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 597.0) internal successors, (2388), 4 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:36:37,307 INFO L175 Difference]: Start difference. First operand has 66 places, 78 transitions, 208 flow. Second operand 3 states and 932 transitions. [2023-08-04 08:36:37,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 118 transitions, 514 flow [2023-08-04 08:36:37,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 118 transitions, 512 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:36:37,310 INFO L231 Difference]: Finished difference. Result has 68 places, 79 transitions, 218 flow [2023-08-04 08:36:37,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=597, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=65, 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=218, PETRI_PLACES=68, PETRI_TRANSITIONS=79} [2023-08-04 08:36:37,311 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 2 predicate places. [2023-08-04 08:36:37,311 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 79 transitions, 218 flow [2023-08-04 08:36:37,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 280.3333333333333) internal successors, (841), 3 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:36:37,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:36:37,311 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 08:36:37,318 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-04 08:36:37,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:36:37,516 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:36:37,516 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:36:37,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1276843099, now seen corresponding path program 1 times [2023-08-04 08:36:37,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:36:37,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554178738] [2023-08-04 08:36:37,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:36:37,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:36:37,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:36:37,572 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 08:36:37,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:36:37,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554178738] [2023-08-04 08:36:37,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554178738] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:36:37,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705423587] [2023-08-04 08:36:37,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:36:37,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:36:37,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:36:37,589 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 08:36:37,641 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 08:36:37,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:36:37,713 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:36:37,714 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:36:37,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:36:37,720 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:36:37,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705423587] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:36:37,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:36:37,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:36:37,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591581021] [2023-08-04 08:36:37,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:36:37,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:36:37,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:36:37,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:36:37,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:36:37,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 597 [2023-08-04 08:36:37,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 79 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 281.6666666666667) internal successors, (845), 3 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:36:37,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:36:37,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 597 [2023-08-04 08:36:37,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:36:43,686 INFO L124 PetriNetUnfolderBase]: 86551/111478 cut-off events. [2023-08-04 08:36:43,687 INFO L125 PetriNetUnfolderBase]: For 20506/20506 co-relation queries the response was YES. [2023-08-04 08:36:44,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233479 conditions, 111478 events. 86551/111478 cut-off events. For 20506/20506 co-relation queries the response was YES. Maximal size of possible extension queue 2927. Compared 626011 event pairs, 47867 based on Foata normal form. 0/79768 useless extension candidates. Maximal degree in co-relation 84162. Up to 93383 conditions per place. [2023-08-04 08:36:44,357 INFO L140 encePairwiseOnDemand]: 594/597 looper letters, 107 selfloop transitions, 2 changer transitions 0/119 dead transitions. [2023-08-04 08:36:44,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 119 transitions, 526 flow [2023-08-04 08:36:44,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:36:44,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:36:44,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 932 transitions. [2023-08-04 08:36:44,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5203796761585706 [2023-08-04 08:36:44,360 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 932 transitions. [2023-08-04 08:36:44,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 932 transitions. [2023-08-04 08:36:44,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:36:44,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 932 transitions. [2023-08-04 08:36:44,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 310.6666666666667) internal successors, (932), 3 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:36:44,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 597.0) internal successors, (2388), 4 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:36:44,364 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 597.0) internal successors, (2388), 4 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:36:44,364 INFO L175 Difference]: Start difference. First operand has 68 places, 79 transitions, 218 flow. Second operand 3 states and 932 transitions. [2023-08-04 08:36:44,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 119 transitions, 526 flow [2023-08-04 08:36:44,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 119 transitions, 524 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:36:44,507 INFO L231 Difference]: Finished difference. Result has 70 places, 80 transitions, 228 flow [2023-08-04 08:36:44,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=597, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=67, 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=228, PETRI_PLACES=70, PETRI_TRANSITIONS=80} [2023-08-04 08:36:44,507 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 4 predicate places. [2023-08-04 08:36:44,507 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 80 transitions, 228 flow [2023-08-04 08:36:44,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 281.6666666666667) internal successors, (845), 3 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:36:44,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:36:44,508 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] [2023-08-04 08:36:44,513 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 08:36:44,712 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 08:36:44,713 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:36:44,713 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:36:44,713 INFO L85 PathProgramCache]: Analyzing trace with hash 223018533, now seen corresponding path program 1 times [2023-08-04 08:36:44,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:36:44,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502132068] [2023-08-04 08:36:44,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:36:44,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:36:44,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:36:44,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:36:44,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:36:44,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502132068] [2023-08-04 08:36:44,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502132068] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:36:44,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744269652] [2023-08-04 08:36:44,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:36:44,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:36:44,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:36:44,785 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 08:36:44,792 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 08:36:44,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:36:44,864 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:36:44,865 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:36:44,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:36:44,876 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:36:44,887 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:36:44,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744269652] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:36:44,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:36:44,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:36:44,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714016824] [2023-08-04 08:36:44,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:36:44,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:36:44,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:36:44,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:36:44,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:36:44,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 597 [2023-08-04 08:36:44,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 80 transitions, 228 flow. Second operand has 5 states, 5 states have (on average 279.6) internal successors, (1398), 5 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:36:44,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:36:44,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 597 [2023-08-04 08:36:44,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:36:50,902 INFO L124 PetriNetUnfolderBase]: 80953/103858 cut-off events. [2023-08-04 08:36:50,902 INFO L125 PetriNetUnfolderBase]: For 16409/16409 co-relation queries the response was YES. [2023-08-04 08:36:51,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218457 conditions, 103858 events. 80953/103858 cut-off events. For 16409/16409 co-relation queries the response was YES. Maximal size of possible extension queue 2823. Compared 573594 event pairs, 24305 based on Foata normal form. 6/74406 useless extension candidates. Maximal degree in co-relation 173868. Up to 99926 conditions per place. [2023-08-04 08:36:51,498 INFO L140 encePairwiseOnDemand]: 593/597 looper letters, 93 selfloop transitions, 3 changer transitions 1/107 dead transitions. [2023-08-04 08:36:51,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 107 transitions, 476 flow [2023-08-04 08:36:51,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:36:51,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:36:51,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1191 transitions. [2023-08-04 08:36:51,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49874371859296485 [2023-08-04 08:36:51,515 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1191 transitions. [2023-08-04 08:36:51,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1191 transitions. [2023-08-04 08:36:51,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:36:51,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1191 transitions. [2023-08-04 08:36:51,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 297.75) internal successors, (1191), 4 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:36:51,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 597.0) internal successors, (2985), 5 states have internal predecessors, (2985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:36:51,533 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 597.0) internal successors, (2985), 5 states have internal predecessors, (2985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:36:51,533 INFO L175 Difference]: Start difference. First operand has 70 places, 80 transitions, 228 flow. Second operand 4 states and 1191 transitions. [2023-08-04 08:36:51,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 107 transitions, 476 flow [2023-08-04 08:36:52,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 107 transitions, 474 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:36:52,076 INFO L231 Difference]: Finished difference. Result has 74 places, 80 transitions, 240 flow [2023-08-04 08:36:52,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=597, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=240, PETRI_PLACES=74, PETRI_TRANSITIONS=80} [2023-08-04 08:36:52,076 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 8 predicate places. [2023-08-04 08:36:52,076 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 80 transitions, 240 flow [2023-08-04 08:36:52,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 279.6) internal successors, (1398), 5 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:36:52,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:36:52,077 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] [2023-08-04 08:36:52,241 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-04 08:36:52,440 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 08:36:52,441 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:36:52,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:36:52,441 INFO L85 PathProgramCache]: Analyzing trace with hash -947634587, now seen corresponding path program 1 times [2023-08-04 08:36:52,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:36:52,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897413237] [2023-08-04 08:36:52,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:36:52,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:36:52,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:36:52,489 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 08:36:52,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:36:52,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897413237] [2023-08-04 08:36:52,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897413237] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:36:52,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466887511] [2023-08-04 08:36:52,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:36:52,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:36:52,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:36:52,490 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 08:36:52,492 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 08:36:52,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:36:52,575 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:36:52,576 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:36:52,585 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 08:36:52,585 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:36:52,596 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 08:36:52,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466887511] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:36:52,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:36:52,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:36:52,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174281626] [2023-08-04 08:36:52,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:36:52,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:36:52,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:36:52,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:36:52,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:36:52,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 597 [2023-08-04 08:36:52,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 80 transitions, 240 flow. Second operand has 5 states, 5 states have (on average 279.8) internal successors, (1399), 5 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:36:52,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:36:52,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 597 [2023-08-04 08:36:52,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:36:58,436 INFO L124 PetriNetUnfolderBase]: 78415/99866 cut-off events. [2023-08-04 08:36:58,436 INFO L125 PetriNetUnfolderBase]: For 7987/7987 co-relation queries the response was YES. [2023-08-04 08:36:58,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210379 conditions, 99866 events. 78415/99866 cut-off events. For 7987/7987 co-relation queries the response was YES. Maximal size of possible extension queue 2727. Compared 540924 event pairs, 20545 based on Foata normal form. 252/71935 useless extension candidates. Maximal degree in co-relation 166069. Up to 72695 conditions per place. [2023-08-04 08:36:58,987 INFO L140 encePairwiseOnDemand]: 593/597 looper letters, 127 selfloop transitions, 3 changer transitions 1/141 dead transitions. [2023-08-04 08:36:58,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 141 transitions, 624 flow [2023-08-04 08:36:58,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:36:58,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:36:59,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1225 transitions. [2023-08-04 08:36:59,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5129815745393634 [2023-08-04 08:36:59,011 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1225 transitions. [2023-08-04 08:36:59,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1225 transitions. [2023-08-04 08:36:59,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:36:59,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1225 transitions. [2023-08-04 08:36:59,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 306.25) internal successors, (1225), 4 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:36:59,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 597.0) internal successors, (2985), 5 states have internal predecessors, (2985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:36:59,018 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 597.0) internal successors, (2985), 5 states have internal predecessors, (2985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:36:59,018 INFO L175 Difference]: Start difference. First operand has 74 places, 80 transitions, 240 flow. Second operand 4 states and 1225 transitions. [2023-08-04 08:36:59,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 141 transitions, 624 flow [2023-08-04 08:37:00,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 141 transitions, 615 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 08:37:00,171 INFO L231 Difference]: Finished difference. Result has 76 places, 80 transitions, 245 flow [2023-08-04 08:37:00,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=597, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=245, PETRI_PLACES=76, PETRI_TRANSITIONS=80} [2023-08-04 08:37:00,173 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 10 predicate places. [2023-08-04 08:37:00,173 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 80 transitions, 245 flow [2023-08-04 08:37:00,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 279.8) internal successors, (1399), 5 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:37:00,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:37:00,184 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] [2023-08-04 08:37:00,191 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 08:37:00,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:37:00,390 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:37:00,390 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:37:00,390 INFO L85 PathProgramCache]: Analyzing trace with hash -777257365, now seen corresponding path program 1 times [2023-08-04 08:37:00,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:37:00,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734892047] [2023-08-04 08:37:00,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:37:00,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:37:00,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:37:00,444 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 08:37:00,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:37:00,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734892047] [2023-08-04 08:37:00,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734892047] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:37:00,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330772084] [2023-08-04 08:37:00,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:37:00,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:37:00,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:37:00,446 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 08:37:00,454 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 08:37:00,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:37:00,532 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:37:00,533 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:37:00,541 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 08:37:00,542 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:37:00,551 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 08:37:00,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330772084] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:37:00,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:37:00,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:37:00,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591196198] [2023-08-04 08:37:00,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:37:00,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:37:00,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:37:00,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:37:00,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:37:00,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 597 [2023-08-04 08:37:00,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 80 transitions, 245 flow. Second operand has 5 states, 5 states have (on average 280.0) internal successors, (1400), 5 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:37:00,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:37:00,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 597 [2023-08-04 08:37:00,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:37:04,788 INFO L124 PetriNetUnfolderBase]: 55600/70974 cut-off events. [2023-08-04 08:37:04,789 INFO L125 PetriNetUnfolderBase]: For 25123/25123 co-relation queries the response was YES. [2023-08-04 08:37:04,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155051 conditions, 70974 events. 55600/70974 cut-off events. For 25123/25123 co-relation queries the response was YES. Maximal size of possible extension queue 2070. Compared 373207 event pairs, 13905 based on Foata normal form. 1092/51713 useless extension candidates. Maximal degree in co-relation 149453. Up to 28061 conditions per place. [2023-08-04 08:37:05,409 INFO L140 encePairwiseOnDemand]: 593/597 looper letters, 140 selfloop transitions, 4 changer transitions 0/154 dead transitions. [2023-08-04 08:37:05,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 154 transitions, 690 flow [2023-08-04 08:37:05,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:37:05,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:37:05,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1238 transitions. [2023-08-04 08:37:05,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.518425460636516 [2023-08-04 08:37:05,411 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1238 transitions. [2023-08-04 08:37:05,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1238 transitions. [2023-08-04 08:37:05,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:37:05,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1238 transitions. [2023-08-04 08:37:05,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 309.5) internal successors, (1238), 4 states have internal predecessors, (1238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:37:05,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 597.0) internal successors, (2985), 5 states have internal predecessors, (2985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:37:05,415 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 597.0) internal successors, (2985), 5 states have internal predecessors, (2985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:37:05,415 INFO L175 Difference]: Start difference. First operand has 76 places, 80 transitions, 245 flow. Second operand 4 states and 1238 transitions. [2023-08-04 08:37:05,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 154 transitions, 690 flow [2023-08-04 08:37:05,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 154 transitions, 680 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 08:37:05,682 INFO L231 Difference]: Finished difference. Result has 78 places, 81 transitions, 256 flow [2023-08-04 08:37:05,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=597, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=256, PETRI_PLACES=78, PETRI_TRANSITIONS=81} [2023-08-04 08:37:05,682 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 12 predicate places. [2023-08-04 08:37:05,682 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 81 transitions, 256 flow [2023-08-04 08:37:05,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 280.0) internal successors, (1400), 5 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:37:05,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:37:05,683 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:37:05,688 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 08:37:05,887 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,SelfDestructingSolverStorable12 [2023-08-04 08:37:05,888 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:37:05,888 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:37:05,888 INFO L85 PathProgramCache]: Analyzing trace with hash -2098319364, now seen corresponding path program 1 times [2023-08-04 08:37:05,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:37:05,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980022368] [2023-08-04 08:37:05,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:37:05,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:37:05,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:37:05,946 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 08:37:05,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:37:05,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980022368] [2023-08-04 08:37:05,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980022368] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:37:05,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969820176] [2023-08-04 08:37:05,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:37:05,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:37:05,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:37:05,948 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 08:37:05,969 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 08:37:06,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:37:06,054 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:37:06,059 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:37:06,072 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 08:37:06,072 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:37:06,083 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 08:37:06,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969820176] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:37:06,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:37:06,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:37:06,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987359075] [2023-08-04 08:37:06,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:37:06,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:37:06,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:37:06,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:37:06,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:37:06,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 597 [2023-08-04 08:37:06,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 81 transitions, 256 flow. Second operand has 5 states, 5 states have (on average 280.4) internal successors, (1402), 5 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:37:06,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:37:06,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 597 [2023-08-04 08:37:06,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:37:10,214 INFO L124 PetriNetUnfolderBase]: 55464/71220 cut-off events. [2023-08-04 08:37:10,215 INFO L125 PetriNetUnfolderBase]: For 33114/33114 co-relation queries the response was YES. [2023-08-04 08:37:10,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159925 conditions, 71220 events. 55464/71220 cut-off events. For 33114/33114 co-relation queries the response was YES. Maximal size of possible extension queue 2070. Compared 378998 event pairs, 34268 based on Foata normal form. 27/50942 useless extension candidates. Maximal degree in co-relation 154572. Up to 66035 conditions per place. [2023-08-04 08:37:10,677 INFO L140 encePairwiseOnDemand]: 593/597 looper letters, 140 selfloop transitions, 3 changer transitions 2/155 dead transitions. [2023-08-04 08:37:10,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 155 transitions, 702 flow [2023-08-04 08:37:10,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:37:10,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:37:10,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1238 transitions. [2023-08-04 08:37:10,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.518425460636516 [2023-08-04 08:37:10,680 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1238 transitions. [2023-08-04 08:37:10,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1238 transitions. [2023-08-04 08:37:10,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:37:10,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1238 transitions. [2023-08-04 08:37:10,683 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 309.5) internal successors, (1238), 4 states have internal predecessors, (1238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:37:10,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 597.0) internal successors, (2985), 5 states have internal predecessors, (2985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:37:10,686 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 597.0) internal successors, (2985), 5 states have internal predecessors, (2985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:37:10,687 INFO L175 Difference]: Start difference. First operand has 78 places, 81 transitions, 256 flow. Second operand 4 states and 1238 transitions. [2023-08-04 08:37:10,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 155 transitions, 702 flow [2023-08-04 08:37:11,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 155 transitions, 698 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 08:37:11,561 INFO L231 Difference]: Finished difference. Result has 82 places, 80 transitions, 260 flow [2023-08-04 08:37:11,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=597, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=260, PETRI_PLACES=82, PETRI_TRANSITIONS=80} [2023-08-04 08:37:11,562 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 16 predicate places. [2023-08-04 08:37:11,562 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 80 transitions, 260 flow [2023-08-04 08:37:11,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 280.4) internal successors, (1402), 5 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:37:11,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:37:11,563 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:37:11,581 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-04 08:37:11,781 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,SelfDestructingSolverStorable13 [2023-08-04 08:37:11,781 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:37:11,781 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:37:11,782 INFO L85 PathProgramCache]: Analyzing trace with hash -500386891, now seen corresponding path program 1 times [2023-08-04 08:37:11,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:37:11,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308480846] [2023-08-04 08:37:11,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:37:11,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:37:11,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:37:12,315 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 08:37:12,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:37:12,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308480846] [2023-08-04 08:37:12,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308480846] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:37:12,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199097917] [2023-08-04 08:37:12,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:37:12,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:37:12,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:37:12,316 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 08:37:12,319 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 08:37:12,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:37:12,424 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-04 08:37:12,425 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:37:12,774 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 08:37:12,774 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:37:13,035 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 08:37:13,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199097917] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:37:13,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:37:13,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-04 08:37:13,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644714582] [2023-08-04 08:37:13,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:37:13,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-04 08:37:13,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:37:13,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-04 08:37:13,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-08-04 08:37:13,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 597 [2023-08-04 08:37:13,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 80 transitions, 260 flow. Second operand has 12 states, 12 states have (on average 250.58333333333334) internal successors, (3007), 12 states have internal predecessors, (3007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:37:13,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:37:13,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 597 [2023-08-04 08:37:13,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:37:21,421 INFO L124 PetriNetUnfolderBase]: 95504/126707 cut-off events. [2023-08-04 08:37:21,421 INFO L125 PetriNetUnfolderBase]: For 61679/61679 co-relation queries the response was YES. [2023-08-04 08:37:21,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 288190 conditions, 126707 events. 95504/126707 cut-off events. For 61679/61679 co-relation queries the response was YES. Maximal size of possible extension queue 3945. Compared 803728 event pairs, 35690 based on Foata normal form. 1/95726 useless extension candidates. Maximal degree in co-relation 286852. Up to 60323 conditions per place. [2023-08-04 08:37:22,111 INFO L140 encePairwiseOnDemand]: 574/597 looper letters, 207 selfloop transitions, 26 changer transitions 6/249 dead transitions. [2023-08-04 08:37:22,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 249 transitions, 1327 flow [2023-08-04 08:37:22,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-04 08:37:22,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-04 08:37:22,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1960 transitions. [2023-08-04 08:37:22,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46901172529313234 [2023-08-04 08:37:22,115 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1960 transitions. [2023-08-04 08:37:22,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1960 transitions. [2023-08-04 08:37:22,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:37:22,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1960 transitions. [2023-08-04 08:37:22,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 280.0) internal successors, (1960), 7 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:37:22,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 597.0) internal successors, (4776), 8 states have internal predecessors, (4776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:37:22,124 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 597.0) internal successors, (4776), 8 states have internal predecessors, (4776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:37:22,124 INFO L175 Difference]: Start difference. First operand has 82 places, 80 transitions, 260 flow. Second operand 7 states and 1960 transitions. [2023-08-04 08:37:22,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 249 transitions, 1327 flow [2023-08-04 08:37:24,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 249 transitions, 1295 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-04 08:37:24,873 INFO L231 Difference]: Finished difference. Result has 91 places, 106 transitions, 490 flow [2023-08-04 08:37:24,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=597, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=490, PETRI_PLACES=91, PETRI_TRANSITIONS=106} [2023-08-04 08:37:24,874 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 25 predicate places. [2023-08-04 08:37:24,874 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 106 transitions, 490 flow [2023-08-04 08:37:24,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 250.58333333333334) internal successors, (3007), 12 states have internal predecessors, (3007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:37:24,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:37:24,875 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:37:24,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-04 08:37:25,083 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,SelfDestructingSolverStorable14 [2023-08-04 08:37:25,083 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:37:25,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:37:25,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1335894149, now seen corresponding path program 2 times [2023-08-04 08:37:25,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:37:25,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110996097] [2023-08-04 08:37:25,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:37:25,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:37:25,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:37:25,393 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 08:37:25,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:37:25,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110996097] [2023-08-04 08:37:25,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110996097] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:37:25,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:37:25,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-04 08:37:25,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503356149] [2023-08-04 08:37:25,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:37:25,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-04 08:37:25,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:37:25,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-04 08:37:25,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-04 08:37:25,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 597 [2023-08-04 08:37:25,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 106 transitions, 490 flow. Second operand has 7 states, 7 states have (on average 250.42857142857142) internal successors, (1753), 7 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:37:25,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:37:25,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 597 [2023-08-04 08:37:25,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:37:36,032 INFO L124 PetriNetUnfolderBase]: 107007/144235 cut-off events. [2023-08-04 08:37:36,032 INFO L125 PetriNetUnfolderBase]: For 193460/193673 co-relation queries the response was YES. [2023-08-04 08:37:36,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 439194 conditions, 144235 events. 107007/144235 cut-off events. For 193460/193673 co-relation queries the response was YES. Maximal size of possible extension queue 4485. Compared 960938 event pairs, 36126 based on Foata normal form. 11/130538 useless extension candidates. Maximal degree in co-relation 439156. Up to 60323 conditions per place. [2023-08-04 08:37:37,287 INFO L140 encePairwiseOnDemand]: 578/597 looper letters, 218 selfloop transitions, 48 changer transitions 8/284 dead transitions. [2023-08-04 08:37:37,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 284 transitions, 1828 flow [2023-08-04 08:37:37,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-04 08:37:37,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-04 08:37:37,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1945 transitions. [2023-08-04 08:37:37,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4654223498444604 [2023-08-04 08:37:37,291 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1945 transitions. [2023-08-04 08:37:37,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1945 transitions. [2023-08-04 08:37:37,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:37:37,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1945 transitions. [2023-08-04 08:37:37,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 277.85714285714283) internal successors, (1945), 7 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:37:37,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 597.0) internal successors, (4776), 8 states have internal predecessors, (4776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:37:37,297 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 597.0) internal successors, (4776), 8 states have internal predecessors, (4776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:37:37,297 INFO L175 Difference]: Start difference. First operand has 91 places, 106 transitions, 490 flow. Second operand 7 states and 1945 transitions. [2023-08-04 08:37:37,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 284 transitions, 1828 flow [2023-08-04 08:37:39,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 284 transitions, 1814 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-08-04 08:37:39,362 INFO L231 Difference]: Finished difference. Result has 98 places, 144 transitions, 948 flow [2023-08-04 08:37:39,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=597, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=948, PETRI_PLACES=98, PETRI_TRANSITIONS=144} [2023-08-04 08:37:39,363 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 32 predicate places. [2023-08-04 08:37:39,364 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 144 transitions, 948 flow [2023-08-04 08:37:39,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 250.42857142857142) internal successors, (1753), 7 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:37:39,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:37:39,364 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:37:39,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-04 08:37:39,364 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:37:39,365 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:37:39,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1129223644, now seen corresponding path program 1 times [2023-08-04 08:37:39,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:37:39,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397482955] [2023-08-04 08:37:39,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:37:39,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:37:39,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:37:39,410 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 08:37:39,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:37:39,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397482955] [2023-08-04 08:37:39,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397482955] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:37:39,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:37:39,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:37:39,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457088989] [2023-08-04 08:37:39,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:37:39,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:37:39,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:37:39,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:37:39,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:37:39,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 597 [2023-08-04 08:37:39,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 144 transitions, 948 flow. Second operand has 3 states, 3 states have (on average 278.0) internal successors, (834), 3 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:37:39,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:37:39,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 597 [2023-08-04 08:37:39,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:37:45,435 INFO L124 PetriNetUnfolderBase]: 48817/65149 cut-off events. [2023-08-04 08:37:45,436 INFO L125 PetriNetUnfolderBase]: For 179517/180014 co-relation queries the response was YES. [2023-08-04 08:37:45,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218035 conditions, 65149 events. 48817/65149 cut-off events. For 179517/180014 co-relation queries the response was YES. Maximal size of possible extension queue 2058. Compared 385684 event pairs, 26823 based on Foata normal form. 6589/64904 useless extension candidates. Maximal degree in co-relation 218008. Up to 60302 conditions per place. [2023-08-04 08:37:45,995 INFO L140 encePairwiseOnDemand]: 589/597 looper letters, 78 selfloop transitions, 4 changer transitions 30/122 dead transitions. [2023-08-04 08:37:45,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 122 transitions, 870 flow [2023-08-04 08:37:45,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:37:45,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:37:45,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 897 transitions. [2023-08-04 08:37:45,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5008375209380235 [2023-08-04 08:37:45,997 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 897 transitions. [2023-08-04 08:37:45,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 897 transitions. [2023-08-04 08:37:45,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:37:45,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 897 transitions. [2023-08-04 08:37:45,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 299.0) internal successors, (897), 3 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:37:46,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 597.0) internal successors, (2388), 4 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:37:46,002 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 597.0) internal successors, (2388), 4 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:37:46,002 INFO L175 Difference]: Start difference. First operand has 98 places, 144 transitions, 948 flow. Second operand 3 states and 897 transitions. [2023-08-04 08:37:46,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 122 transitions, 870 flow [2023-08-04 08:37:46,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 122 transitions, 858 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-04 08:37:46,523 INFO L231 Difference]: Finished difference. Result has 96 places, 80 transitions, 384 flow [2023-08-04 08:37:46,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=597, PETRI_DIFFERENCE_MINUEND_FLOW=468, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=384, PETRI_PLACES=96, PETRI_TRANSITIONS=80} [2023-08-04 08:37:46,523 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 30 predicate places. [2023-08-04 08:37:46,523 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 80 transitions, 384 flow [2023-08-04 08:37:46,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 278.0) internal successors, (834), 3 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:37:46,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:37:46,524 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:37:46,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-04 08:37:46,524 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:37:46,524 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:37:46,524 INFO L85 PathProgramCache]: Analyzing trace with hash -331157576, now seen corresponding path program 1 times [2023-08-04 08:37:46,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:37:46,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717752798] [2023-08-04 08:37:46,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:37:46,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:37:46,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:37:46,996 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 08:37:46,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:37:46,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717752798] [2023-08-04 08:37:46,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717752798] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:37:46,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702561767] [2023-08-04 08:37:46,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:37:46,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:37:46,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:37:47,010 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 08:37:47,011 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 08:37:47,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:37:47,107 INFO L262 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-04 08:37:47,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:37:47,563 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 08:37:47,564 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:37:47,827 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 08:37:47,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702561767] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:37:47,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:37:47,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 20 [2023-08-04 08:37:47,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312949182] [2023-08-04 08:37:47,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:37:47,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-04 08:37:47,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:37:47,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-04 08:37:47,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2023-08-04 08:37:48,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 597 [2023-08-04 08:37:48,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 80 transitions, 384 flow. Second operand has 22 states, 22 states have (on average 231.0) internal successors, (5082), 22 states have internal predecessors, (5082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:37:48,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:37:48,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 597 [2023-08-04 08:37:48,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:38:11,194 INFO L124 PetriNetUnfolderBase]: 188254/251544 cut-off events. [2023-08-04 08:38:11,195 INFO L125 PetriNetUnfolderBase]: For 492819/496348 co-relation queries the response was YES. [2023-08-04 08:38:12,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 868125 conditions, 251544 events. 188254/251544 cut-off events. For 492819/496348 co-relation queries the response was YES. Maximal size of possible extension queue 6920. Compared 1704374 event pairs, 30222 based on Foata normal form. 4/225321 useless extension candidates. Maximal degree in co-relation 868105. Up to 102976 conditions per place. [2023-08-04 08:38:13,169 INFO L140 encePairwiseOnDemand]: 578/597 looper letters, 1052 selfloop transitions, 130 changer transitions 19/1211 dead transitions. [2023-08-04 08:38:13,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 1211 transitions, 8492 flow [2023-08-04 08:38:13,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-04 08:38:13,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-04 08:38:13,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 10704 transitions. [2023-08-04 08:38:13,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42689638669538166 [2023-08-04 08:38:13,183 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 10704 transitions. [2023-08-04 08:38:13,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 10704 transitions. [2023-08-04 08:38:13,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:38:13,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 10704 transitions. [2023-08-04 08:38:13,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 254.85714285714286) internal successors, (10704), 42 states have internal predecessors, (10704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:38:13,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 597.0) internal successors, (25671), 43 states have internal predecessors, (25671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:38:13,215 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 597.0) internal successors, (25671), 43 states have internal predecessors, (25671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:38:13,215 INFO L175 Difference]: Start difference. First operand has 96 places, 80 transitions, 384 flow. Second operand 42 states and 10704 transitions. [2023-08-04 08:38:13,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 1211 transitions, 8492 flow [2023-08-04 08:40:10,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 1211 transitions, 7450 flow, removed 521 selfloop flow, removed 4 redundant places. [2023-08-04 08:40:10,909 INFO L231 Difference]: Finished difference. Result has 152 places, 239 transitions, 1606 flow [2023-08-04 08:40:10,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=597, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=1606, PETRI_PLACES=152, PETRI_TRANSITIONS=239} [2023-08-04 08:40:10,909 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 86 predicate places. [2023-08-04 08:40:10,909 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 239 transitions, 1606 flow [2023-08-04 08:40:10,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 231.0) internal successors, (5082), 22 states have internal predecessors, (5082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:10,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:40:10,929 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:40:10,951 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 08:40:11,136 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 08:40:11,136 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:40:11,137 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:40:11,137 INFO L85 PathProgramCache]: Analyzing trace with hash 50562891, now seen corresponding path program 1 times [2023-08-04 08:40:11,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:40:11,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740191368] [2023-08-04 08:40:11,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:40:11,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:40:11,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:40:11,429 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-04 08:40:11,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:40:11,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740191368] [2023-08-04 08:40:11,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740191368] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:40:11,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318246416] [2023-08-04 08:40:11,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:40:11,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:40:11,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:40:11,443 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 08:40:11,444 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 08:40:11,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:40:11,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-04 08:40:11,542 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:40:12,056 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 08:40:12,056 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:40:13,217 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-04 08:40:13,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318246416] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:40:13,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:40:13,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 12] total 35 [2023-08-04 08:40:13,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965184914] [2023-08-04 08:40:13,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:40:13,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-04 08:40:13,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:40:13,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-04 08:40:13,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1034, Unknown=0, NotChecked=0, Total=1260 [2023-08-04 08:40:14,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 597 [2023-08-04 08:40:14,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 239 transitions, 1606 flow. Second operand has 36 states, 36 states have (on average 229.02777777777777) internal successors, (8245), 36 states have internal predecessors, (8245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:40:14,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:40:14,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 597 [2023-08-04 08:40:14,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand