/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_unroll-cond-4.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 03:38:29,101 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 03:38:29,177 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 03:38:29,184 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 03:38:29,184 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 03:38:29,185 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 03:38:29,185 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 03:38:29,222 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 03:38:29,222 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 03:38:29,222 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 03:38:29,223 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 03:38:29,223 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 03:38:29,224 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 03:38:29,224 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 03:38:29,227 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 03:38:29,227 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 03:38:29,228 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 03:38:29,231 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 03:38:29,231 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 03:38:29,232 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 03:38:29,233 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 03:38:29,233 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 03:38:29,233 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 03:38:29,233 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 03:38:29,234 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 03:38:29,235 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 03:38:29,235 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 03:38:29,235 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 03:38:29,236 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 03:38:29,236 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 03:38:29,237 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 03:38:29,237 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 03:38:29,237 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 03:38:29,237 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 03:38:29,237 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 03:38:29,237 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 03:38:29,237 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 03:38:29,238 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 03:38:29,238 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 03:38:29,238 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 03:38:29,238 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 03:38:29,238 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 03:38:29,484 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 03:38:29,503 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 03:38:29,506 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 03:38:29,507 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 03:38:29,507 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 03:38:29,508 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_unroll-cond-4.wvr_bound2.c [2023-08-04 03:38:30,743 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 03:38:30,929 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 03:38:30,929 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_unroll-cond-4.wvr_bound2.c [2023-08-04 03:38:30,936 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c98a25e09/fa8c2fb62abe4f6785b9438134378efb/FLAGfef4cedd3 [2023-08-04 03:38:30,947 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c98a25e09/fa8c2fb62abe4f6785b9438134378efb [2023-08-04 03:38:30,949 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 03:38:30,951 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 03:38:30,951 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 03:38:30,952 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 03:38:30,954 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 03:38:30,955 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 03:38:30" (1/1) ... [2023-08-04 03:38:30,956 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6de43a49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:38:30, skipping insertion in model container [2023-08-04 03:38:30,956 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 03:38:30" (1/1) ... [2023-08-04 03:38:30,975 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 03:38:31,131 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_unroll-cond-4.wvr_bound2.c[2970,2983] [2023-08-04 03:38:31,136 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 03:38:31,143 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 03:38:31,165 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_unroll-cond-4.wvr_bound2.c[2970,2983] [2023-08-04 03:38:31,168 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 03:38:31,182 INFO L206 MainTranslator]: Completed translation [2023-08-04 03:38:31,183 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:38:31 WrapperNode [2023-08-04 03:38:31,183 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 03:38:31,184 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 03:38:31,184 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 03:38:31,184 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 03:38:31,192 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:38:31" (1/1) ... [2023-08-04 03:38:31,210 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:38:31" (1/1) ... [2023-08-04 03:38:31,232 INFO L138 Inliner]: procedures = 24, calls = 41, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 218 [2023-08-04 03:38:31,233 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 03:38:31,234 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 03:38:31,234 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 03:38:31,234 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 03:38:31,241 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:38:31" (1/1) ... [2023-08-04 03:38:31,241 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:38:31" (1/1) ... [2023-08-04 03:38:31,244 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:38:31" (1/1) ... [2023-08-04 03:38:31,244 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:38:31" (1/1) ... [2023-08-04 03:38:31,251 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:38:31" (1/1) ... [2023-08-04 03:38:31,255 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:38:31" (1/1) ... [2023-08-04 03:38:31,257 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:38:31" (1/1) ... [2023-08-04 03:38:31,258 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:38:31" (1/1) ... [2023-08-04 03:38:31,260 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 03:38:31,261 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 03:38:31,261 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 03:38:31,261 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 03:38:31,262 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:38:31" (1/1) ... [2023-08-04 03:38:31,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 03:38:31,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:38:31,292 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 03:38:31,293 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 03:38:31,320 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 03:38:31,320 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 03:38:31,320 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 03:38:31,320 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 03:38:31,321 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 03:38:31,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 03:38:31,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 03:38:31,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 03:38:31,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 03:38:31,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 03:38:31,321 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 03:38:31,321 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 03:38:31,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 03:38:31,323 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 03:38:31,405 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 03:38:31,407 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 03:38:31,753 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 03:38:31,769 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 03:38:31,770 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-08-04 03:38:31,772 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 03:38:31 BoogieIcfgContainer [2023-08-04 03:38:31,772 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 03:38:31,774 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 03:38:31,774 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 03:38:31,777 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 03:38:31,777 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 03:38:30" (1/3) ... [2023-08-04 03:38:31,777 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3747ac44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 03:38:31, skipping insertion in model container [2023-08-04 03:38:31,778 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:38:31" (2/3) ... [2023-08-04 03:38:31,778 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3747ac44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 03:38:31, skipping insertion in model container [2023-08-04 03:38:31,778 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 03:38:31" (3/3) ... [2023-08-04 03:38:31,779 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_unroll-cond-4.wvr_bound2.c [2023-08-04 03:38:31,790 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 03:38:31,797 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 03:38:31,797 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 03:38:31,797 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 03:38:31,928 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 03:38:31,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 228 places, 252 transitions, 526 flow [2023-08-04 03:38:32,119 INFO L124 PetriNetUnfolderBase]: 58/485 cut-off events. [2023-08-04 03:38:32,120 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 03:38:32,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 505 conditions, 485 events. 58/485 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1992 event pairs, 0 based on Foata normal form. 0/417 useless extension candidates. Maximal degree in co-relation 253. Up to 8 conditions per place. [2023-08-04 03:38:32,132 INFO L82 GeneralOperation]: Start removeDead. Operand has 228 places, 252 transitions, 526 flow [2023-08-04 03:38:32,148 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 228 places, 252 transitions, 526 flow [2023-08-04 03:38:32,151 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:38:32,167 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 228 places, 252 transitions, 526 flow [2023-08-04 03:38:32,173 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 228 places, 252 transitions, 526 flow [2023-08-04 03:38:32,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 228 places, 252 transitions, 526 flow [2023-08-04 03:38:32,247 INFO L124 PetriNetUnfolderBase]: 58/485 cut-off events. [2023-08-04 03:38:32,248 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 03:38:32,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 505 conditions, 485 events. 58/485 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1992 event pairs, 0 based on Foata normal form. 0/417 useless extension candidates. Maximal degree in co-relation 253. Up to 8 conditions per place. [2023-08-04 03:38:32,265 INFO L119 LiptonReduction]: Number of co-enabled transitions 16158 [2023-08-04 03:38:37,193 INFO L134 LiptonReduction]: Checked pairs total: 21004 [2023-08-04 03:38:37,193 INFO L136 LiptonReduction]: Total number of compositions: 266 [2023-08-04 03:38:37,206 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 03:38:37,211 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;@1a53029b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:38:37,211 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 03:38:37,216 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:38:37,216 INFO L124 PetriNetUnfolderBase]: 4/32 cut-off events. [2023-08-04 03:38:37,216 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 03:38:37,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:38:37,216 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-04 03:38:37,217 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:38:37,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:38:37,221 INFO L85 PathProgramCache]: Analyzing trace with hash 569378001, now seen corresponding path program 1 times [2023-08-04 03:38:37,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:38:37,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914777280] [2023-08-04 03:38:37,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:38:37,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:38:37,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:38:37,539 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 03:38:37,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:38:37,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914777280] [2023-08-04 03:38:37,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914777280] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:38:37,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:38:37,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 03:38:37,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328473383] [2023-08-04 03:38:37,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:38:37,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:38:37,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:38:37,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:38:37,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:38:37,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 518 [2023-08-04 03:38:37,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 52 transitions, 126 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 03:38:37,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:38:37,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 518 [2023-08-04 03:38:37,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:38:37,867 INFO L124 PetriNetUnfolderBase]: 1532/2319 cut-off events. [2023-08-04 03:38:37,867 INFO L125 PetriNetUnfolderBase]: For 93/93 co-relation queries the response was YES. [2023-08-04 03:38:37,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4658 conditions, 2319 events. 1532/2319 cut-off events. For 93/93 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 11384 event pairs, 964 based on Foata normal form. 42/1534 useless extension candidates. Maximal degree in co-relation 3768. Up to 2260 conditions per place. [2023-08-04 03:38:37,876 INFO L140 encePairwiseOnDemand]: 511/518 looper letters, 30 selfloop transitions, 2 changer transitions 13/49 dead transitions. [2023-08-04 03:38:37,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 49 transitions, 206 flow [2023-08-04 03:38:37,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:38:37,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:38:37,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 714 transitions. [2023-08-04 03:38:37,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4594594594594595 [2023-08-04 03:38:37,895 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 714 transitions. [2023-08-04 03:38:37,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 714 transitions. [2023-08-04 03:38:37,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:38:37,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 714 transitions. [2023-08-04 03:38:37,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 238.0) internal successors, (714), 3 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:38:37,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 518.0) internal successors, (2072), 4 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:38:37,914 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 518.0) internal successors, (2072), 4 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:38:37,915 INFO L175 Difference]: Start difference. First operand has 44 places, 52 transitions, 126 flow. Second operand 3 states and 714 transitions. [2023-08-04 03:38:37,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 49 transitions, 206 flow [2023-08-04 03:38:37,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 49 transitions, 206 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 03:38:37,923 INFO L231 Difference]: Finished difference. Result has 46 places, 36 transitions, 92 flow [2023-08-04 03:38:37,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=518, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=43, 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=92, PETRI_PLACES=46, PETRI_TRANSITIONS=36} [2023-08-04 03:38:37,929 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 2 predicate places. [2023-08-04 03:38:37,930 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 36 transitions, 92 flow [2023-08-04 03:38:37,931 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 03:38:37,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:38:37,931 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-04 03:38:37,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 03:38:37,931 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:38:37,939 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:38:37,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1737902335, now seen corresponding path program 1 times [2023-08-04 03:38:37,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:38:37,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179291412] [2023-08-04 03:38:37,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:38:37,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:38:37,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 03:38:37,991 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 03:38:38,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 03:38:38,035 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 03:38:38,035 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 03:38:38,036 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 03:38:38,038 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 03:38:38,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 03:38:38,038 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 03:38:38,040 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-04 03:38:38,041 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 03:38:38,041 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 03:38:38,102 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 03:38:38,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 341 places, 380 transitions, 808 flow [2023-08-04 03:38:38,322 INFO L124 PetriNetUnfolderBase]: 200/1441 cut-off events. [2023-08-04 03:38:38,322 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 03:38:38,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1538 conditions, 1441 events. 200/1441 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 9344 event pairs, 1 based on Foata normal form. 0/1238 useless extension candidates. Maximal degree in co-relation 888. Up to 32 conditions per place. [2023-08-04 03:38:38,344 INFO L82 GeneralOperation]: Start removeDead. Operand has 341 places, 380 transitions, 808 flow [2023-08-04 03:38:38,356 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 341 places, 380 transitions, 808 flow [2023-08-04 03:38:38,356 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:38:38,356 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 341 places, 380 transitions, 808 flow [2023-08-04 03:38:38,358 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 341 places, 380 transitions, 808 flow [2023-08-04 03:38:38,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 341 places, 380 transitions, 808 flow [2023-08-04 03:38:38,554 INFO L124 PetriNetUnfolderBase]: 200/1441 cut-off events. [2023-08-04 03:38:38,555 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 03:38:38,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1538 conditions, 1441 events. 200/1441 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 9344 event pairs, 1 based on Foata normal form. 0/1238 useless extension candidates. Maximal degree in co-relation 888. Up to 32 conditions per place. [2023-08-04 03:38:38,651 INFO L119 LiptonReduction]: Number of co-enabled transitions 64356 [2023-08-04 03:38:43,818 INFO L134 LiptonReduction]: Checked pairs total: 107929 [2023-08-04 03:38:43,819 INFO L136 LiptonReduction]: Total number of compositions: 372 [2023-08-04 03:38:43,821 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 03:38:43,821 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;@1a53029b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:38:43,822 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 03:38:43,830 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:38:43,831 INFO L124 PetriNetUnfolderBase]: 15/115 cut-off events. [2023-08-04 03:38:43,831 INFO L125 PetriNetUnfolderBase]: For 9/10 co-relation queries the response was YES. [2023-08-04 03:38:43,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:38:43,831 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-04 03:38:43,831 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:38:43,831 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:38:43,832 INFO L85 PathProgramCache]: Analyzing trace with hash -963000618, now seen corresponding path program 1 times [2023-08-04 03:38:43,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:38:43,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777413268] [2023-08-04 03:38:43,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:38:43,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:38:43,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:38:43,943 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 03:38:43,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:38:43,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777413268] [2023-08-04 03:38:43,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777413268] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:38:43,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:38:43,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 03:38:43,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083029210] [2023-08-04 03:38:43,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:38:43,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:38:43,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:38:43,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:38:43,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:38:43,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 334 out of 752 [2023-08-04 03:38:43,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 104 transitions, 256 flow. Second operand has 3 states, 3 states have (on average 336.0) internal successors, (1008), 3 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:38:43,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:38:43,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 334 of 752 [2023-08-04 03:38:43,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:39:37,724 INFO L124 PetriNetUnfolderBase]: 721035/899706 cut-off events. [2023-08-04 03:39:37,724 INFO L125 PetriNetUnfolderBase]: For 47604/47604 co-relation queries the response was YES. [2023-08-04 03:39:39,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1802761 conditions, 899706 events. 721035/899706 cut-off events. For 47604/47604 co-relation queries the response was YES. Maximal size of possible extension queue 19972. Compared 5658455 event pairs, 496965 based on Foata normal form. 20696/637575 useless extension candidates. Maximal degree in co-relation 572329. Up to 884002 conditions per place. [2023-08-04 03:39:40,699 INFO L140 encePairwiseOnDemand]: 742/752 looper letters, 67 selfloop transitions, 2 changer transitions 17/97 dead transitions. [2023-08-04 03:39:40,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 97 transitions, 410 flow [2023-08-04 03:39:40,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:39:40,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:39:40,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1094 transitions. [2023-08-04 03:39:40,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4849290780141844 [2023-08-04 03:39:40,704 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1094 transitions. [2023-08-04 03:39:40,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1094 transitions. [2023-08-04 03:39:40,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:39:40,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1094 transitions. [2023-08-04 03:39:40,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 364.6666666666667) internal successors, (1094), 3 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:39:40,711 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 752.0) internal successors, (3008), 4 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:39:40,713 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 752.0) internal successors, (3008), 4 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:39:40,713 INFO L175 Difference]: Start difference. First operand has 88 places, 104 transitions, 256 flow. Second operand 3 states and 1094 transitions. [2023-08-04 03:39:40,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 97 transitions, 410 flow [2023-08-04 03:39:40,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 97 transitions, 410 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 03:39:40,731 INFO L231 Difference]: Finished difference. Result has 89 places, 80 transitions, 194 flow [2023-08-04 03:39:40,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=752, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=194, PETRI_PLACES=89, PETRI_TRANSITIONS=80} [2023-08-04 03:39:40,732 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 1 predicate places. [2023-08-04 03:39:40,732 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 80 transitions, 194 flow [2023-08-04 03:39:40,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 336.0) internal successors, (1008), 3 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:39:40,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:39:40,733 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 03:39:40,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 03:39:40,734 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:39:40,734 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:39:40,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1667925839, now seen corresponding path program 1 times [2023-08-04 03:39:40,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:39:40,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244140828] [2023-08-04 03:39:40,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:39:40,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:39:40,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:39:40,781 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 03:39:40,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:39:40,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244140828] [2023-08-04 03:39:40,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244140828] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:39:40,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635055283] [2023-08-04 03:39:40,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:39:40,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:39:40,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:39:40,789 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 03:39:40,821 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 03:39:40,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:39:40,880 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:39:40,882 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:39:40,940 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 03:39:40,941 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:39:40,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635055283] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:39:40,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:39:40,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 03:39:40,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602744200] [2023-08-04 03:39:40,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:39:40,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:39:40,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:39:40,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:39:40,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 03:39:40,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 333 out of 752 [2023-08-04 03:39:40,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 80 transitions, 194 flow. Second operand has 5 states, 5 states have (on average 335.0) internal successors, (1675), 5 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:39:40,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:39:40,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 333 of 752 [2023-08-04 03:39:40,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:39:55,222 INFO L124 PetriNetUnfolderBase]: 210925/263486 cut-off events. [2023-08-04 03:39:55,223 INFO L125 PetriNetUnfolderBase]: For 2285/2285 co-relation queries the response was YES. [2023-08-04 03:39:55,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 526046 conditions, 263486 events. 210925/263486 cut-off events. For 2285/2285 co-relation queries the response was YES. Maximal size of possible extension queue 6240. Compared 1515609 event pairs, 81925 based on Foata normal form. 0/193154 useless extension candidates. Maximal degree in co-relation 526031. Up to 259786 conditions per place. [2023-08-04 03:39:56,711 INFO L140 encePairwiseOnDemand]: 748/752 looper letters, 80 selfloop transitions, 5 changer transitions 0/95 dead transitions. [2023-08-04 03:39:56,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 95 transitions, 390 flow [2023-08-04 03:39:56,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:39:56,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:39:56,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1750 transitions. [2023-08-04 03:39:56,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4654255319148936 [2023-08-04 03:39:56,716 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1750 transitions. [2023-08-04 03:39:56,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1750 transitions. [2023-08-04 03:39:56,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:39:56,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1750 transitions. [2023-08-04 03:39:56,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 350.0) internal successors, (1750), 5 states have internal predecessors, (1750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:39:56,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 752.0) internal successors, (4512), 6 states have internal predecessors, (4512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:39:56,729 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 752.0) internal successors, (4512), 6 states have internal predecessors, (4512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:39:56,729 INFO L175 Difference]: Start difference. First operand has 89 places, 80 transitions, 194 flow. Second operand 5 states and 1750 transitions. [2023-08-04 03:39:56,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 95 transitions, 390 flow [2023-08-04 03:39:56,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 95 transitions, 383 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-04 03:39:56,736 INFO L231 Difference]: Finished difference. Result has 82 places, 82 transitions, 204 flow [2023-08-04 03:39:56,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=752, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=204, PETRI_PLACES=82, PETRI_TRANSITIONS=82} [2023-08-04 03:39:56,737 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -6 predicate places. [2023-08-04 03:39:56,737 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 82 transitions, 204 flow [2023-08-04 03:39:56,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 335.0) internal successors, (1675), 5 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:39:56,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:39:56,738 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:39:56,744 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 03:39:56,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:39:56,944 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:39:56,944 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:39:56,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1070336952, now seen corresponding path program 1 times [2023-08-04 03:39:56,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:39:56,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139436077] [2023-08-04 03:39:56,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:39:56,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:39:56,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:39:56,984 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 03:39:56,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:39:56,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139436077] [2023-08-04 03:39:56,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139436077] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:39:56,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:39:56,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 03:39:56,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073305084] [2023-08-04 03:39:56,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:39:56,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:39:56,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:39:56,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:39:56,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:39:57,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 334 out of 752 [2023-08-04 03:39:57,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 82 transitions, 204 flow. Second operand has 3 states, 3 states have (on average 336.6666666666667) internal successors, (1010), 3 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:39:57,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:39:57,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 334 of 752 [2023-08-04 03:39:57,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:40:12,282 INFO L124 PetriNetUnfolderBase]: 207247/258340 cut-off events. [2023-08-04 03:40:12,282 INFO L125 PetriNetUnfolderBase]: For 2062/2062 co-relation queries the response was YES. [2023-08-04 03:40:12,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 515378 conditions, 258340 events. 207247/258340 cut-off events. For 2062/2062 co-relation queries the response was YES. Maximal size of possible extension queue 6265. Compared 1462806 event pairs, 114098 based on Foata normal form. 1/189255 useless extension candidates. Maximal degree in co-relation 515358. Up to 254587 conditions per place. [2023-08-04 03:40:13,511 INFO L140 encePairwiseOnDemand]: 749/752 looper letters, 74 selfloop transitions, 2 changer transitions 0/86 dead transitions. [2023-08-04 03:40:13,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 86 transitions, 363 flow [2023-08-04 03:40:13,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:40:13,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:40:13,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1077 transitions. [2023-08-04 03:40:13,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4773936170212766 [2023-08-04 03:40:13,515 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1077 transitions. [2023-08-04 03:40:13,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1077 transitions. [2023-08-04 03:40:13,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:40:13,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1077 transitions. [2023-08-04 03:40:13,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 359.0) internal successors, (1077), 3 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:40:13,522 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 752.0) internal successors, (3008), 4 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:40:13,523 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 752.0) internal successors, (3008), 4 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:40:13,523 INFO L175 Difference]: Start difference. First operand has 82 places, 82 transitions, 204 flow. Second operand 3 states and 1077 transitions. [2023-08-04 03:40:13,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 86 transitions, 363 flow [2023-08-04 03:40:13,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 86 transitions, 362 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:40:13,528 INFO L231 Difference]: Finished difference. Result has 83 places, 81 transitions, 202 flow [2023-08-04 03:40:13,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=752, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=83, PETRI_TRANSITIONS=81} [2023-08-04 03:40:13,529 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -5 predicate places. [2023-08-04 03:40:13,529 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 81 transitions, 202 flow [2023-08-04 03:40:13,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 336.6666666666667) internal successors, (1010), 3 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:40:13,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:40:13,530 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:40:13,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-04 03:40:13,530 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:40:13,530 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:40:13,530 INFO L85 PathProgramCache]: Analyzing trace with hash 10618479, now seen corresponding path program 1 times [2023-08-04 03:40:13,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:40:13,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848484601] [2023-08-04 03:40:13,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:40:13,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:40:13,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:40:13,584 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 03:40:13,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:40:13,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848484601] [2023-08-04 03:40:13,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848484601] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:40:13,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58889482] [2023-08-04 03:40:13,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:40:13,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:40:13,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:40:13,587 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 03:40:13,589 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 03:40:13,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:40:13,681 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:40:13,682 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:40:13,702 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 03:40:13,702 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:40:13,723 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 03:40:13,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58889482] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:40:13,723 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:40:13,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 03:40:13,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863055792] [2023-08-04 03:40:13,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:40:13,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:40:13,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:40:13,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:40:13,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:40:13,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 333 out of 752 [2023-08-04 03:40:13,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 81 transitions, 202 flow. Second operand has 5 states, 5 states have (on average 336.0) internal successors, (1680), 5 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:40:13,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:40:13,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 333 of 752 [2023-08-04 03:40:13,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:40:25,650 INFO L124 PetriNetUnfolderBase]: 180499/223094 cut-off events. [2023-08-04 03:40:25,651 INFO L125 PetriNetUnfolderBase]: For 1697/1697 co-relation queries the response was YES. [2023-08-04 03:40:26,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 445080 conditions, 223094 events. 180499/223094 cut-off events. For 1697/1697 co-relation queries the response was YES. Maximal size of possible extension queue 5496. Compared 1212525 event pairs, 67209 based on Foata normal form. 5/162946 useless extension candidates. Maximal degree in co-relation 445059. Up to 219866 conditions per place. [2023-08-04 03:40:26,824 INFO L140 encePairwiseOnDemand]: 749/752 looper letters, 80 selfloop transitions, 3 changer transitions 0/93 dead transitions. [2023-08-04 03:40:26,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 93 transitions, 391 flow [2023-08-04 03:40:26,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:40:26,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:40:26,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1415 transitions. [2023-08-04 03:40:26,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47041223404255317 [2023-08-04 03:40:26,828 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1415 transitions. [2023-08-04 03:40:26,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1415 transitions. [2023-08-04 03:40:26,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:40:26,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1415 transitions. [2023-08-04 03:40:26,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 353.75) internal successors, (1415), 4 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:40:26,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 752.0) internal successors, (3760), 5 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:40:26,837 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 752.0) internal successors, (3760), 5 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:40:26,838 INFO L175 Difference]: Start difference. First operand has 83 places, 81 transitions, 202 flow. Second operand 4 states and 1415 transitions. [2023-08-04 03:40:26,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 93 transitions, 391 flow [2023-08-04 03:40:26,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 93 transitions, 387 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 03:40:26,841 INFO L231 Difference]: Finished difference. Result has 84 places, 80 transitions, 199 flow [2023-08-04 03:40:26,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=752, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=81, 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=199, PETRI_PLACES=84, PETRI_TRANSITIONS=80} [2023-08-04 03:40:26,842 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -4 predicate places. [2023-08-04 03:40:26,842 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 80 transitions, 199 flow [2023-08-04 03:40:26,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 336.0) internal successors, (1680), 5 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:40:26,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:40:26,843 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:40:26,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-04 03:40:27,049 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,SelfDestructingSolverStorable5 [2023-08-04 03:40:27,049 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:40:27,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:40:27,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1002075829, now seen corresponding path program 1 times [2023-08-04 03:40:27,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:40:27,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825469308] [2023-08-04 03:40:27,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:40:27,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:40:27,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:40:27,105 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 03:40:27,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:40:27,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825469308] [2023-08-04 03:40:27,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825469308] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:40:27,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958241452] [2023-08-04 03:40:27,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:40:27,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:40:27,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:40:27,108 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 03:40:27,110 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 03:40:27,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:40:27,190 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:40:27,191 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:40:27,212 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 03:40:27,212 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:40:27,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958241452] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:40:27,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:40:27,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 03:40:27,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305938792] [2023-08-04 03:40:27,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:40:27,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:40:27,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:40:27,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:40:27,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 03:40:27,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 333 out of 752 [2023-08-04 03:40:27,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 80 transitions, 199 flow. Second operand has 5 states, 5 states have (on average 336.0) internal successors, (1680), 5 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:40:27,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:40:27,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 333 of 752 [2023-08-04 03:40:27,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:40:34,091 INFO L124 PetriNetUnfolderBase]: 115676/143925 cut-off events. [2023-08-04 03:40:34,091 INFO L125 PetriNetUnfolderBase]: For 843/843 co-relation queries the response was YES. [2023-08-04 03:40:34,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 288051 conditions, 143925 events. 115676/143925 cut-off events. For 843/843 co-relation queries the response was YES. Maximal size of possible extension queue 3740. Compared 759582 event pairs, 1159 based on Foata normal form. 12650/117334 useless extension candidates. Maximal degree in co-relation 288030. Up to 75085 conditions per place. [2023-08-04 03:40:34,366 INFO L140 encePairwiseOnDemand]: 749/752 looper letters, 0 selfloop transitions, 0 changer transitions 177/177 dead transitions. [2023-08-04 03:40:34,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 177 transitions, 727 flow [2023-08-04 03:40:34,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:40:34,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:40:34,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1832 transitions. [2023-08-04 03:40:34,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48723404255319147 [2023-08-04 03:40:34,370 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1832 transitions. [2023-08-04 03:40:34,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1832 transitions. [2023-08-04 03:40:34,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:40:34,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1832 transitions. [2023-08-04 03:40:34,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 366.4) internal successors, (1832), 5 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:40:34,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 752.0) internal successors, (4512), 6 states have internal predecessors, (4512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:40:34,380 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 752.0) internal successors, (4512), 6 states have internal predecessors, (4512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:40:34,380 INFO L175 Difference]: Start difference. First operand has 84 places, 80 transitions, 199 flow. Second operand 5 states and 1832 transitions. [2023-08-04 03:40:34,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 177 transitions, 727 flow [2023-08-04 03:40:34,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 177 transitions, 720 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 03:40:34,436 INFO L231 Difference]: Finished difference. Result has 83 places, 0 transitions, 0 flow [2023-08-04 03:40:34,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=752, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=83, PETRI_TRANSITIONS=0} [2023-08-04 03:40:34,437 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -5 predicate places. [2023-08-04 03:40:34,437 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 0 transitions, 0 flow [2023-08-04 03:40:34,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 336.0) internal successors, (1680), 5 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:40:34,438 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 03:40:34,438 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 03:40:34,443 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 03:40:34,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:40:34,639 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-04 03:40:34,639 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE (1/2) [2023-08-04 03:40:34,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 341 places, 380 transitions, 808 flow [2023-08-04 03:40:34,791 INFO L124 PetriNetUnfolderBase]: 200/1441 cut-off events. [2023-08-04 03:40:34,791 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 03:40:34,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1538 conditions, 1441 events. 200/1441 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 9344 event pairs, 1 based on Foata normal form. 0/1238 useless extension candidates. Maximal degree in co-relation 888. Up to 32 conditions per place. [2023-08-04 03:40:34,803 INFO L82 GeneralOperation]: Start removeDead. Operand has 341 places, 380 transitions, 808 flow [2023-08-04 03:40:34,809 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 341 places, 380 transitions, 808 flow [2023-08-04 03:40:34,809 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:40:34,809 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 341 places, 380 transitions, 808 flow [2023-08-04 03:40:34,809 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 341 places, 380 transitions, 808 flow [2023-08-04 03:40:34,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 341 places, 380 transitions, 808 flow [2023-08-04 03:40:34,926 INFO L124 PetriNetUnfolderBase]: 200/1441 cut-off events. [2023-08-04 03:40:34,926 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 03:40:34,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1538 conditions, 1441 events. 200/1441 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 9344 event pairs, 1 based on Foata normal form. 0/1238 useless extension candidates. Maximal degree in co-relation 888. Up to 32 conditions per place. [2023-08-04 03:40:34,997 INFO L119 LiptonReduction]: Number of co-enabled transitions 64356 [2023-08-04 03:40:40,020 INFO L134 LiptonReduction]: Checked pairs total: 108860 [2023-08-04 03:40:40,020 INFO L136 LiptonReduction]: Total number of compositions: 370 [2023-08-04 03:40:40,022 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 03:40:40,022 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;@1a53029b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:40:40,022 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 03:40:40,024 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:40:40,024 INFO L124 PetriNetUnfolderBase]: 1/15 cut-off events. [2023-08-04 03:40:40,024 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 03:40:40,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:40:40,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 03:40:40,024 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:40:40,024 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:40:40,025 INFO L85 PathProgramCache]: Analyzing trace with hash -893845263, now seen corresponding path program 1 times [2023-08-04 03:40:40,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:40:40,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383155006] [2023-08-04 03:40:40,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:40:40,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:40:40,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:40:40,045 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 03:40:40,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:40:40,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383155006] [2023-08-04 03:40:40,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383155006] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:40:40,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:40:40,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 03:40:40,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343777668] [2023-08-04 03:40:40,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:40:40,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:40:40,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:40:40,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:40:40,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:40:40,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 334 out of 750 [2023-08-04 03:40:40,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 106 transitions, 260 flow. Second operand has 3 states, 3 states have (on average 336.0) internal successors, (1008), 3 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:40:40,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:40:40,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 334 of 750 [2023-08-04 03:40:40,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:41:49,676 INFO L124 PetriNetUnfolderBase]: 908865/1124438 cut-off events. [2023-08-04 03:41:49,677 INFO L125 PetriNetUnfolderBase]: For 55957/55957 co-relation queries the response was YES. [2023-08-04 03:41:51,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2254141 conditions, 1124438 events. 908865/1124438 cut-off events. For 55957/55957 co-relation queries the response was YES. Maximal size of possible extension queue 25103. Compared 7044439 event pairs, 515966 based on Foata normal form. 60453/795116 useless extension candidates. Maximal degree in co-relation 735507. Up to 1107351 conditions per place. [2023-08-04 03:41:54,344 INFO L140 encePairwiseOnDemand]: 739/750 looper letters, 89 selfloop transitions, 2 changer transitions 2/104 dead transitions. [2023-08-04 03:41:54,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 104 transitions, 438 flow [2023-08-04 03:41:54,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:41:54,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:41:54,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1102 transitions. [2023-08-04 03:41:54,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48977777777777776 [2023-08-04 03:41:54,347 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1102 transitions. [2023-08-04 03:41:54,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1102 transitions. [2023-08-04 03:41:54,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:41:54,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1102 transitions. [2023-08-04 03:41:54,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 367.3333333333333) internal successors, (1102), 3 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:41:54,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:41:54,353 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:41:54,353 INFO L175 Difference]: Start difference. First operand has 89 places, 106 transitions, 260 flow. Second operand 3 states and 1102 transitions. [2023-08-04 03:41:54,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 104 transitions, 438 flow [2023-08-04 03:41:54,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 104 transitions, 438 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 03:41:54,374 INFO L231 Difference]: Finished difference. Result has 91 places, 97 transitions, 244 flow [2023-08-04 03:41:54,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=750, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=244, PETRI_PLACES=91, PETRI_TRANSITIONS=97} [2023-08-04 03:41:54,375 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, 2 predicate places. [2023-08-04 03:41:54,375 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 97 transitions, 244 flow [2023-08-04 03:41:54,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 336.0) internal successors, (1008), 3 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:41:54,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:41:54,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:41:54,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 03:41:54,376 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:41:54,376 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:41:54,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1905958062, now seen corresponding path program 1 times [2023-08-04 03:41:54,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:41:54,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369212579] [2023-08-04 03:41:54,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:41:54,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:41:54,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:41:54,403 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 03:41:54,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:41:54,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369212579] [2023-08-04 03:41:54,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369212579] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:41:54,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741765159] [2023-08-04 03:41:54,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:41:54,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:41:54,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:41:54,411 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 03:41:54,412 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 03:41:54,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:41:54,477 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 03:41:54,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:41:54,489 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 03:41:54,489 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:41:54,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741765159] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:41:54,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:41:54,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 03:41:54,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490138654] [2023-08-04 03:41:54,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:41:54,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:41:54,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:41:54,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:41:54,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:41:54,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 334 out of 750 [2023-08-04 03:41:54,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 97 transitions, 244 flow. Second operand has 3 states, 3 states have (on average 337.0) internal successors, (1011), 3 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:41:54,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:41:54,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 334 of 750 [2023-08-04 03:41:54,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:42:58,368 INFO L124 PetriNetUnfolderBase]: 900166/1114084 cut-off events. [2023-08-04 03:42:58,369 INFO L125 PetriNetUnfolderBase]: For 50881/50881 co-relation queries the response was YES. [2023-08-04 03:43:00,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2233115 conditions, 1114084 events. 900166/1114084 cut-off events. For 50881/50881 co-relation queries the response was YES. Maximal size of possible extension queue 25356. Compared 7029579 event pairs, 447413 based on Foata normal form. 0/728109 useless extension candidates. Maximal degree in co-relation 2233069. Up to 1094479 conditions per place. [2023-08-04 03:43:03,431 INFO L140 encePairwiseOnDemand]: 747/750 looper letters, 119 selfloop transitions, 2 changer transitions 0/132 dead transitions. [2023-08-04 03:43:03,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 132 transitions, 556 flow [2023-08-04 03:43:03,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:43:03,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:43:03,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1123 transitions. [2023-08-04 03:43:03,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4991111111111111 [2023-08-04 03:43:03,435 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1123 transitions. [2023-08-04 03:43:03,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1123 transitions. [2023-08-04 03:43:03,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:43:03,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1123 transitions. [2023-08-04 03:43:03,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 374.3333333333333) internal successors, (1123), 3 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:43:03,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:43:03,441 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:43:03,441 INFO L175 Difference]: Start difference. First operand has 91 places, 97 transitions, 244 flow. Second operand 3 states and 1123 transitions. [2023-08-04 03:43:03,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 132 transitions, 556 flow [2023-08-04 03:43:03,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 132 transitions, 548 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 03:43:03,551 INFO L231 Difference]: Finished difference. Result has 89 places, 98 transitions, 248 flow [2023-08-04 03:43:03,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=750, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=248, PETRI_PLACES=89, PETRI_TRANSITIONS=98} [2023-08-04 03:43:03,552 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, 0 predicate places. [2023-08-04 03:43:03,552 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 98 transitions, 248 flow [2023-08-04 03:43:03,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 337.0) internal successors, (1011), 3 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:43:03,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:43:03,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:43:03,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 03:43:03,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:43:03,758 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:43:03,758 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:43:03,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1660313914, now seen corresponding path program 1 times [2023-08-04 03:43:03,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:43:03,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138042623] [2023-08-04 03:43:03,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:43:03,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:43:03,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:43:03,811 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 03:43:03,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:43:03,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138042623] [2023-08-04 03:43:03,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138042623] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:43:03,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239140986] [2023-08-04 03:43:03,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:43:03,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:43:03,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:43:03,813 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 03:43:03,815 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 03:43:03,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:43:03,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 03:43:03,878 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:43:03,888 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 03:43:03,888 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:43:03,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239140986] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:43:03,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:43:03,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 03:43:03,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365971667] [2023-08-04 03:43:03,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:43:03,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:43:03,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:43:03,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:43:03,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:43:03,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 334 out of 750 [2023-08-04 03:43:03,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 98 transitions, 248 flow. Second operand has 3 states, 3 states have (on average 338.0) internal successors, (1014), 3 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:43:03,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:43:03,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 334 of 750 [2023-08-04 03:43:03,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:43:49,570 INFO L124 PetriNetUnfolderBase]: 661700/830631 cut-off events. [2023-08-04 03:43:49,571 INFO L125 PetriNetUnfolderBase]: For 51226/51226 co-relation queries the response was YES. [2023-08-04 03:43:50,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1699899 conditions, 830631 events. 661700/830631 cut-off events. For 51226/51226 co-relation queries the response was YES. Maximal size of possible extension queue 18075. Compared 5411368 event pairs, 295021 based on Foata normal form. 0/577404 useless extension candidates. Maximal degree in co-relation 544765. Up to 538061 conditions per place. [2023-08-04 03:43:53,022 INFO L140 encePairwiseOnDemand]: 747/750 looper letters, 149 selfloop transitions, 2 changer transitions 0/162 dead transitions. [2023-08-04 03:43:53,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 162 transitions, 688 flow [2023-08-04 03:43:53,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:43:53,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:43:53,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1152 transitions. [2023-08-04 03:43:53,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.512 [2023-08-04 03:43:53,025 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1152 transitions. [2023-08-04 03:43:53,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1152 transitions. [2023-08-04 03:43:53,025 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:43:53,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1152 transitions. [2023-08-04 03:43:53,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 384.0) internal successors, (1152), 3 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:43:53,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:43:53,031 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:43:53,031 INFO L175 Difference]: Start difference. First operand has 89 places, 98 transitions, 248 flow. Second operand 3 states and 1152 transitions. [2023-08-04 03:43:53,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 162 transitions, 688 flow [2023-08-04 03:43:53,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 162 transitions, 686 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:43:53,042 INFO L231 Difference]: Finished difference. Result has 91 places, 99 transitions, 258 flow [2023-08-04 03:43:53,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=750, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=258, PETRI_PLACES=91, PETRI_TRANSITIONS=99} [2023-08-04 03:43:53,043 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, 2 predicate places. [2023-08-04 03:43:53,043 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 99 transitions, 258 flow [2023-08-04 03:43:53,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 338.0) internal successors, (1014), 3 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:43:53,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:43:53,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:43:53,053 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-04 03:43:53,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-04 03:43:53,251 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:43:53,251 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:43:53,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1909144661, now seen corresponding path program 1 times [2023-08-04 03:43:53,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:43:53,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761060604] [2023-08-04 03:43:53,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:43:53,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:43:53,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:43:53,297 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 03:43:53,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:43:53,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761060604] [2023-08-04 03:43:53,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761060604] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:43:53,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517349630] [2023-08-04 03:43:53,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:43:53,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:43:53,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:43:53,299 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 03:43:53,329 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 03:43:53,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:43:53,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 03:43:53,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:43:53,394 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 03:43:53,394 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:43:53,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517349630] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:43:53,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:43:53,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 03:43:53,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689595626] [2023-08-04 03:43:53,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:43:53,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:43:53,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:43:53,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:43:53,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:43:53,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 334 out of 750 [2023-08-04 03:43:53,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 99 transitions, 258 flow. Second operand has 3 states, 3 states have (on average 339.3333333333333) internal successors, (1018), 3 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:43:53,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:43:53,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 334 of 750 [2023-08-04 03:43:53,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:44:42,925 INFO L124 PetriNetUnfolderBase]: 633313/793353 cut-off events. [2023-08-04 03:44:42,926 INFO L125 PetriNetUnfolderBase]: For 172597/172597 co-relation queries the response was YES. [2023-08-04 03:44:44,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1673769 conditions, 793353 events. 633313/793353 cut-off events. For 172597/172597 co-relation queries the response was YES. Maximal size of possible extension queue 17005. Compared 5044931 event pairs, 388239 based on Foata normal form. 0/565495 useless extension candidates. Maximal degree in co-relation 674315. Up to 693925 conditions per place. [2023-08-04 03:44:46,355 INFO L140 encePairwiseOnDemand]: 747/750 looper letters, 150 selfloop transitions, 2 changer transitions 0/163 dead transitions. [2023-08-04 03:44:46,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 163 transitions, 700 flow [2023-08-04 03:44:46,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:44:46,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:44:46,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1152 transitions. [2023-08-04 03:44:46,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.512 [2023-08-04 03:44:46,358 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1152 transitions. [2023-08-04 03:44:46,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1152 transitions. [2023-08-04 03:44:46,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:44:46,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1152 transitions. [2023-08-04 03:44:46,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 384.0) internal successors, (1152), 3 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:44:46,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:44:46,363 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:44:46,363 INFO L175 Difference]: Start difference. First operand has 91 places, 99 transitions, 258 flow. Second operand 3 states and 1152 transitions. [2023-08-04 03:44:46,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 163 transitions, 700 flow [2023-08-04 03:44:49,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 163 transitions, 698 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:44:49,986 INFO L231 Difference]: Finished difference. Result has 93 places, 100 transitions, 268 flow [2023-08-04 03:44:49,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=750, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=268, PETRI_PLACES=93, PETRI_TRANSITIONS=100} [2023-08-04 03:44:49,987 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, 4 predicate places. [2023-08-04 03:44:49,987 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 100 transitions, 268 flow [2023-08-04 03:44:49,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 339.3333333333333) internal successors, (1018), 3 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:44:49,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:44:49,987 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 03:44:49,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 03:44:50,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:44:50,188 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:44:50,188 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:44:50,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1304910173, now seen corresponding path program 1 times [2023-08-04 03:44:50,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:44:50,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409867585] [2023-08-04 03:44:50,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:44:50,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:44:50,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:44:50,226 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 03:44:50,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:44:50,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409867585] [2023-08-04 03:44:50,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409867585] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:44:50,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349593803] [2023-08-04 03:44:50,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:44:50,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:44:50,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:44:50,228 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 03:44:50,231 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 03:44:50,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:44:50,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 03:44:50,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:44:50,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 03:44:50,318 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:44:50,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349593803] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:44:50,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:44:50,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 03:44:50,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345517319] [2023-08-04 03:44:50,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:44:50,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:44:50,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:44:50,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:44:50,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:44:50,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 334 out of 750 [2023-08-04 03:44:50,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 100 transitions, 268 flow. Second operand has 3 states, 3 states have (on average 341.0) internal successors, (1023), 3 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:44:50,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:44:50,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 334 of 750 [2023-08-04 03:44:50,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:45:40,839 INFO L124 PetriNetUnfolderBase]: 633313/793766 cut-off events. [2023-08-04 03:45:40,839 INFO L125 PetriNetUnfolderBase]: For 144069/144069 co-relation queries the response was YES. [2023-08-04 03:45:42,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1677892 conditions, 793766 events. 633313/793766 cut-off events. For 144069/144069 co-relation queries the response was YES. Maximal size of possible extension queue 17005. Compared 5042298 event pairs, 435028 based on Foata normal form. 1/567037 useless extension candidates. Maximal degree in co-relation 1455443. Up to 780106 conditions per place. [2023-08-04 03:45:44,656 INFO L140 encePairwiseOnDemand]: 747/750 looper letters, 88 selfloop transitions, 2 changer transitions 0/101 dead transitions. [2023-08-04 03:45:44,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 101 transitions, 450 flow [2023-08-04 03:45:44,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:45:44,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:45:44,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1089 transitions. [2023-08-04 03:45:44,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.484 [2023-08-04 03:45:44,659 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1089 transitions. [2023-08-04 03:45:44,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1089 transitions. [2023-08-04 03:45:44,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:45:44,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1089 transitions. [2023-08-04 03:45:44,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 363.0) internal successors, (1089), 3 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:45:44,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:45:44,664 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 750.0) internal successors, (3000), 4 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:45:44,664 INFO L175 Difference]: Start difference. First operand has 93 places, 100 transitions, 268 flow. Second operand 3 states and 1089 transitions. [2023-08-04 03:45:44,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 101 transitions, 450 flow [2023-08-04 03:46:08,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 101 transitions, 448 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:46:08,981 INFO L231 Difference]: Finished difference. Result has 95 places, 101 transitions, 278 flow [2023-08-04 03:46:08,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=750, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=278, PETRI_PLACES=95, PETRI_TRANSITIONS=101} [2023-08-04 03:46:08,982 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, 6 predicate places. [2023-08-04 03:46:08,982 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 101 transitions, 278 flow [2023-08-04 03:46:08,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 341.0) internal successors, (1023), 3 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:46:08,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:46:08,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:46:08,990 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 03:46:09,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:46:09,184 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:46:09,184 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:46:09,184 INFO L85 PathProgramCache]: Analyzing trace with hash 515875436, now seen corresponding path program 1 times [2023-08-04 03:46:09,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:46:09,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322582530] [2023-08-04 03:46:09,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:46:09,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:46:09,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:46:09,246 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 03:46:09,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:46:09,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322582530] [2023-08-04 03:46:09,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322582530] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:46:09,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892780051] [2023-08-04 03:46:09,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:46:09,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:46:09,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:46:09,248 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 03:46:09,275 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 03:46:09,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:46:09,334 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:46:09,335 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:46:09,346 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 03:46:09,346 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:46:09,360 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 03:46:09,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892780051] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:46:09,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:46:09,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 03:46:09,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105341623] [2023-08-04 03:46:09,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:46:09,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:46:09,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:46:09,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:46:09,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:46:09,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 333 out of 750 [2023-08-04 03:46:09,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 101 transitions, 278 flow. Second operand has 5 states, 5 states have (on average 338.2) internal successors, (1691), 5 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:46:09,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:46:09,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 333 of 750 [2023-08-04 03:46:09,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:46:54,830 INFO L124 PetriNetUnfolderBase]: 581291/724497 cut-off events. [2023-08-04 03:46:54,830 INFO L125 PetriNetUnfolderBase]: For 115719/115719 co-relation queries the response was YES. [2023-08-04 03:46:56,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1530580 conditions, 724497 events. 581291/724497 cut-off events. For 115719/115719 co-relation queries the response was YES. Maximal size of possible extension queue 15660. Compared 4488437 event pairs, 236547 based on Foata normal form. 5/513869 useless extension candidates. Maximal degree in co-relation 1530561. Up to 713169 conditions per place. [2023-08-04 03:46:58,320 INFO L140 encePairwiseOnDemand]: 746/750 looper letters, 101 selfloop transitions, 3 changer transitions 1/116 dead transitions. [2023-08-04 03:46:58,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 116 transitions, 518 flow [2023-08-04 03:46:58,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:46:58,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:46:58,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1434 transitions. [2023-08-04 03:46:58,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.478 [2023-08-04 03:46:58,323 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1434 transitions. [2023-08-04 03:46:58,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1434 transitions. [2023-08-04 03:46:58,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:46:58,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1434 transitions. [2023-08-04 03:46:58,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 358.5) internal successors, (1434), 4 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:46:58,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 750.0) internal successors, (3750), 5 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:46:58,328 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 750.0) internal successors, (3750), 5 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:46:58,328 INFO L175 Difference]: Start difference. First operand has 95 places, 101 transitions, 278 flow. Second operand 4 states and 1434 transitions. [2023-08-04 03:46:58,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 116 transitions, 518 flow [2023-08-04 03:47:07,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 116 transitions, 514 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 03:47:07,547 INFO L231 Difference]: Finished difference. Result has 99 places, 101 transitions, 288 flow [2023-08-04 03:47:07,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=750, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=288, PETRI_PLACES=99, PETRI_TRANSITIONS=101} [2023-08-04 03:47:07,548 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, 10 predicate places. [2023-08-04 03:47:07,548 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 101 transitions, 288 flow [2023-08-04 03:47:07,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 338.2) internal successors, (1691), 5 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:47:07,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:47:07,549 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] [2023-08-04 03:47:07,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 03:47:07,749 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,SelfDestructingSolverStorable12 [2023-08-04 03:47:07,749 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:47:07,750 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:47:07,750 INFO L85 PathProgramCache]: Analyzing trace with hash 243321967, now seen corresponding path program 1 times [2023-08-04 03:47:07,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:47:07,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130730730] [2023-08-04 03:47:07,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:47:07,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:47:07,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:47:07,800 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 03:47:07,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:47:07,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130730730] [2023-08-04 03:47:07,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130730730] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:47:07,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151823798] [2023-08-04 03:47:07,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:47:07,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:47:07,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:47:07,802 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 03:47:07,804 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 03:47:07,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:47:07,892 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:47:07,893 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:47:07,905 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 03:47:07,905 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:47:07,918 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 03:47:07,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151823798] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:47:07,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:47:07,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 03:47:07,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998643093] [2023-08-04 03:47:07,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:47:07,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:47:07,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:47:07,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:47:07,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:47:07,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 333 out of 750 [2023-08-04 03:47:07,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 101 transitions, 288 flow. Second operand has 5 states, 5 states have (on average 338.2) internal successors, (1691), 5 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:47:07,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:47:07,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 333 of 750 [2023-08-04 03:47:07,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:47:56,531 INFO L124 PetriNetUnfolderBase]: 578081/720966 cut-off events. [2023-08-04 03:47:56,531 INFO L125 PetriNetUnfolderBase]: For 55567/55567 co-relation queries the response was YES. [2023-08-04 03:47:57,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1521402 conditions, 720966 events. 578081/720966 cut-off events. For 55567/55567 co-relation queries the response was YES. Maximal size of possible extension queue 15813. Compared 4543614 event pairs, 146282 based on Foata normal form. 690/513531 useless extension candidates. Maximal degree in co-relation 1521375. Up to 524707 conditions per place. [2023-08-04 03:47:59,985 INFO L140 encePairwiseOnDemand]: 746/750 looper letters, 179 selfloop transitions, 3 changer transitions 1/194 dead transitions. [2023-08-04 03:47:59,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 194 transitions, 840 flow [2023-08-04 03:47:59,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:47:59,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:47:59,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1512 transitions. [2023-08-04 03:47:59,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.504 [2023-08-04 03:47:59,988 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1512 transitions. [2023-08-04 03:47:59,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1512 transitions. [2023-08-04 03:47:59,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:47:59,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1512 transitions. [2023-08-04 03:47:59,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 378.0) internal successors, (1512), 4 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:47:59,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 750.0) internal successors, (3750), 5 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:47:59,993 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 750.0) internal successors, (3750), 5 states have internal predecessors, (3750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:47:59,993 INFO L175 Difference]: Start difference. First operand has 99 places, 101 transitions, 288 flow. Second operand 4 states and 1512 transitions. [2023-08-04 03:47:59,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 194 transitions, 840 flow Received shutdown request... [2023-08-04 03:48:39,260 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-04 03:48:39,261 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-04 03:48:40,275 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-04 03:48:40,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Cannot interrupt operation gracefully because timeout expired. Forcing shutdown