/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_unroll-cond-5.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 10:03:24,150 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 10:03:24,226 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 10:03:24,230 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 10:03:24,231 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 10:03:24,232 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 10:03:24,232 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 10:03:24,258 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 10:03:24,259 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 10:03:24,263 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 10:03:24,263 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 10:03:24,263 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 10:03:24,264 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 10:03:24,265 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 10:03:24,265 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 10:03:24,266 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 10:03:24,266 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 10:03:24,266 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 10:03:24,266 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 10:03:24,266 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 10:03:24,267 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 10:03:24,267 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 10:03:24,267 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 10:03:24,268 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 10:03:24,268 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 10:03:24,268 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 10:03:24,268 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 10:03:24,269 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 10:03:24,269 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 10:03:24,270 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 10:03:24,270 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 10:03:24,271 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 10:03:24,271 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 10:03:24,271 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 10:03:24,271 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 10:03:24,271 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 10:03:24,271 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 10:03:24,272 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 10:03:24,272 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 10:03:24,272 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 10:03:24,272 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 10:03:24,272 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 10:03:24,516 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 10:03:24,541 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 10:03:24,543 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 10:03:24,544 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 10:03:24,544 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 10:03:24,545 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_unroll-cond-5.wvr_bound2.c [2023-08-04 10:03:25,663 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 10:03:25,847 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 10:03:25,848 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_unroll-cond-5.wvr_bound2.c [2023-08-04 10:03:25,854 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c60e8acd9/ebfc73b79b4c4754be1a690e261f0b75/FLAG6a3e7417a [2023-08-04 10:03:25,865 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c60e8acd9/ebfc73b79b4c4754be1a690e261f0b75 [2023-08-04 10:03:25,867 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 10:03:25,868 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 10:03:25,869 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 10:03:25,869 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 10:03:25,872 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 10:03:25,873 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 10:03:25" (1/1) ... [2023-08-04 10:03:25,874 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42919ed0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 10:03:25, skipping insertion in model container [2023-08-04 10:03:25,874 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 10:03:25" (1/1) ... [2023-08-04 10:03:25,906 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 10:03:26,047 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-5.wvr_bound2.c[3137,3150] [2023-08-04 10:03:26,051 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 10:03:26,059 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 10:03:26,082 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-5.wvr_bound2.c[3137,3150] [2023-08-04 10:03:26,085 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 10:03:26,098 INFO L206 MainTranslator]: Completed translation [2023-08-04 10:03:26,098 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 10:03:26 WrapperNode [2023-08-04 10:03:26,098 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 10:03:26,099 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 10:03:26,099 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 10:03:26,100 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 10:03:26,106 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 10:03:26" (1/1) ... [2023-08-04 10:03:26,114 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 10:03:26" (1/1) ... [2023-08-04 10:03:26,142 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 17, calls inlined = 17, statements flattened = 239 [2023-08-04 10:03:26,142 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 10:03:26,143 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 10:03:26,143 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 10:03:26,143 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 10:03:26,150 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 10:03:26" (1/1) ... [2023-08-04 10:03:26,150 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 10:03:26" (1/1) ... [2023-08-04 10:03:26,153 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 10:03:26" (1/1) ... [2023-08-04 10:03:26,153 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 10:03:26" (1/1) ... [2023-08-04 10:03:26,161 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 10:03:26" (1/1) ... [2023-08-04 10:03:26,165 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 10:03:26" (1/1) ... [2023-08-04 10:03:26,167 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 10:03:26" (1/1) ... [2023-08-04 10:03:26,168 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 10:03:26" (1/1) ... [2023-08-04 10:03:26,179 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 10:03:26,180 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 10:03:26,180 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 10:03:26,180 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 10:03:26,180 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 10:03:26" (1/1) ... [2023-08-04 10:03:26,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 10:03:26,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 10:03:26,214 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 10:03:26,237 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 10:03:26,257 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 10:03:26,258 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 10:03:26,258 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 10:03:26,258 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 10:03:26,258 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 10:03:26,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 10:03:26,258 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 10:03:26,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 10:03:26,259 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 10:03:26,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 10:03:26,259 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 10:03:26,260 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 10:03:26,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 10:03:26,262 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 10:03:26,378 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 10:03:26,379 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 10:03:26,845 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 10:03:26,860 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 10:03:26,860 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-08-04 10:03:26,862 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 10:03:26 BoogieIcfgContainer [2023-08-04 10:03:26,862 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 10:03:26,864 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 10:03:26,864 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 10:03:26,867 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 10:03:26,867 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 10:03:25" (1/3) ... [2023-08-04 10:03:26,868 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a4d675 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 10:03:26, skipping insertion in model container [2023-08-04 10:03:26,869 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 10:03:26" (2/3) ... [2023-08-04 10:03:26,869 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a4d675 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 10:03:26, skipping insertion in model container [2023-08-04 10:03:26,869 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 10:03:26" (3/3) ... [2023-08-04 10:03:26,870 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_unroll-cond-5.wvr_bound2.c [2023-08-04 10:03:26,876 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 10:03:26,884 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 10:03:26,885 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 10:03:26,885 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 10:03:26,978 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 10:03:27,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 253 places, 280 transitions, 582 flow [2023-08-04 10:03:27,154 INFO L124 PetriNetUnfolderBase]: 64/541 cut-off events. [2023-08-04 10:03:27,154 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 10:03:27,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 561 conditions, 541 events. 64/541 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2286 event pairs, 0 based on Foata normal form. 0/467 useless extension candidates. Maximal degree in co-relation 281. Up to 8 conditions per place. [2023-08-04 10:03:27,164 INFO L82 GeneralOperation]: Start removeDead. Operand has 253 places, 280 transitions, 582 flow [2023-08-04 10:03:27,172 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 253 places, 280 transitions, 582 flow [2023-08-04 10:03:27,175 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 10:03:27,183 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 253 places, 280 transitions, 582 flow [2023-08-04 10:03:27,185 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 253 places, 280 transitions, 582 flow [2023-08-04 10:03:27,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 253 places, 280 transitions, 582 flow [2023-08-04 10:03:27,268 INFO L124 PetriNetUnfolderBase]: 64/541 cut-off events. [2023-08-04 10:03:27,268 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 10:03:27,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 561 conditions, 541 events. 64/541 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2286 event pairs, 0 based on Foata normal form. 0/467 useless extension candidates. Maximal degree in co-relation 281. Up to 8 conditions per place. [2023-08-04 10:03:27,288 INFO L119 LiptonReduction]: Number of co-enabled transitions 19910 [2023-08-04 10:03:32,722 INFO L134 LiptonReduction]: Checked pairs total: 27094 [2023-08-04 10:03:32,722 INFO L136 LiptonReduction]: Total number of compositions: 295 [2023-08-04 10:03:32,749 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 10:03:32,755 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;@1f90479a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 10:03:32,755 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 10:03:32,766 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 10:03:32,767 INFO L124 PetriNetUnfolderBase]: 2/16 cut-off events. [2023-08-04 10:03:32,767 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 10:03:32,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 10:03:32,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 10:03:32,768 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 10:03:32,774 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 10:03:32,774 INFO L85 PathProgramCache]: Analyzing trace with hash 244689807, now seen corresponding path program 1 times [2023-08-04 10:03:32,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 10:03:32,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312844639] [2023-08-04 10:03:32,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 10:03:32,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 10:03:32,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 10:03:33,022 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 10:03:33,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 10:03:33,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312844639] [2023-08-04 10:03:33,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312844639] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 10:03:33,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 10:03:33,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 10:03:33,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291429163] [2023-08-04 10:03:33,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 10:03:33,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 10:03:33,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 10:03:33,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 10:03:33,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 10:03:33,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 575 [2023-08-04 10:03:33,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 59 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 250.0) internal successors, (750), 3 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 10:03:33,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 10:03:33,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 575 [2023-08-04 10:03:33,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 10:03:33,426 INFO L124 PetriNetUnfolderBase]: 1734/2612 cut-off events. [2023-08-04 10:03:33,427 INFO L125 PetriNetUnfolderBase]: For 111/111 co-relation queries the response was YES. [2023-08-04 10:03:33,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5222 conditions, 2612 events. 1734/2612 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 12515 event pairs, 1109 based on Foata normal form. 0/1765 useless extension candidates. Maximal degree in co-relation 4461. Up to 2524 conditions per place. [2023-08-04 10:03:33,440 INFO L140 encePairwiseOnDemand]: 568/575 looper letters, 47 selfloop transitions, 2 changer transitions 3/57 dead transitions. [2023-08-04 10:03:33,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 57 transitions, 236 flow [2023-08-04 10:03:33,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 10:03:33,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 10:03:33,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 800 transitions. [2023-08-04 10:03:33,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.463768115942029 [2023-08-04 10:03:33,455 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 800 transitions. [2023-08-04 10:03:33,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 800 transitions. [2023-08-04 10:03:33,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 10:03:33,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 800 transitions. [2023-08-04 10:03:33,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 266.6666666666667) internal successors, (800), 3 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 10:03:33,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 575.0) internal successors, (2300), 4 states have internal predecessors, (2300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 10:03:33,472 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 575.0) internal successors, (2300), 4 states have internal predecessors, (2300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 10:03:33,474 INFO L175 Difference]: Start difference. First operand has 50 places, 59 transitions, 140 flow. Second operand 3 states and 800 transitions. [2023-08-04 10:03:33,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 57 transitions, 236 flow [2023-08-04 10:03:33,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 57 transitions, 236 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 10:03:33,480 INFO L231 Difference]: Finished difference. Result has 50 places, 51 transitions, 128 flow [2023-08-04 10:03:33,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=575, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=50, PETRI_TRANSITIONS=51} [2023-08-04 10:03:33,485 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2023-08-04 10:03:33,485 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 51 transitions, 128 flow [2023-08-04 10:03:33,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 250.0) internal successors, (750), 3 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 10:03:33,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 10:03:33,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 10:03:33,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 10:03:33,487 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 10:03:33,487 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 10:03:33,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1605732128, now seen corresponding path program 1 times [2023-08-04 10:03:33,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 10:03:33,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812792129] [2023-08-04 10:03:33,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 10:03:33,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 10:03:33,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 10:03:33,553 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 10:03:33,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 10:03:33,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812792129] [2023-08-04 10:03:33,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812792129] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 10:03:33,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324952922] [2023-08-04 10:03:33,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 10:03:33,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 10:03:33,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 10:03:33,557 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 10:03:33,562 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 10:03:33,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 10:03:33,634 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 10:03:33,638 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 10:03:33,663 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 10:03:33,664 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 10:03:33,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324952922] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 10:03:33,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 10:03:33,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 10:03:33,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710448538] [2023-08-04 10:03:33,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 10:03:33,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 10:03:33,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 10:03:33,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 10:03:33,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 10:03:33,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 575 [2023-08-04 10:03:33,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 51 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 251.0) internal successors, (753), 3 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 10:03:33,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 10:03:33,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 575 [2023-08-04 10:03:33,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 10:03:33,983 INFO L124 PetriNetUnfolderBase]: 1830/2715 cut-off events. [2023-08-04 10:03:33,983 INFO L125 PetriNetUnfolderBase]: For 64/64 co-relation queries the response was YES. [2023-08-04 10:03:33,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5453 conditions, 2715 events. 1830/2715 cut-off events. For 64/64 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 13565 event pairs, 509 based on Foata normal form. 0/1823 useless extension candidates. Maximal degree in co-relation 4633. Up to 2460 conditions per place. [2023-08-04 10:03:33,997 INFO L140 encePairwiseOnDemand]: 572/575 looper letters, 69 selfloop transitions, 2 changer transitions 1/77 dead transitions. [2023-08-04 10:03:33,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 77 transitions, 324 flow [2023-08-04 10:03:33,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 10:03:33,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 10:03:34,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 817 transitions. [2023-08-04 10:03:34,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4736231884057971 [2023-08-04 10:03:34,002 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 817 transitions. [2023-08-04 10:03:34,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 817 transitions. [2023-08-04 10:03:34,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 10:03:34,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 817 transitions. [2023-08-04 10:03:34,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 272.3333333333333) internal successors, (817), 3 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 10:03:34,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 575.0) internal successors, (2300), 4 states have internal predecessors, (2300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 10:03:34,014 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 575.0) internal successors, (2300), 4 states have internal predecessors, (2300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 10:03:34,015 INFO L175 Difference]: Start difference. First operand has 50 places, 51 transitions, 128 flow. Second operand 3 states and 817 transitions. [2023-08-04 10:03:34,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 77 transitions, 324 flow [2023-08-04 10:03:34,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 77 transitions, 314 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 10:03:34,018 INFO L231 Difference]: Finished difference. Result has 47 places, 51 transitions, 126 flow [2023-08-04 10:03:34,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=575, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=47, PETRI_TRANSITIONS=51} [2023-08-04 10:03:34,019 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -3 predicate places. [2023-08-04 10:03:34,019 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 51 transitions, 126 flow [2023-08-04 10:03:34,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 251.0) internal successors, (753), 3 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 10:03:34,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 10:03:34,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 10:03:34,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 10:03:34,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 10:03:34,227 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 10:03:34,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 10:03:34,228 INFO L85 PathProgramCache]: Analyzing trace with hash -219072671, now seen corresponding path program 1 times [2023-08-04 10:03:34,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 10:03:34,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252297180] [2023-08-04 10:03:34,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 10:03:34,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 10:03:34,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 10:03:34,337 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 10:03:34,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 10:03:34,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252297180] [2023-08-04 10:03:34,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252297180] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 10:03:34,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092409790] [2023-08-04 10:03:34,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 10:03:34,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 10:03:34,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 10:03:34,349 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 10:03:34,361 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 10:03:34,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 10:03:34,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 10:03:34,426 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 10:03:34,432 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 10:03:34,432 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 10:03:34,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092409790] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 10:03:34,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 10:03:34,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 10:03:34,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63386925] [2023-08-04 10:03:34,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 10:03:34,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 10:03:34,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 10:03:34,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 10:03:34,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 10:03:34,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 575 [2023-08-04 10:03:34,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 51 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 252.0) internal successors, (756), 3 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 10:03:34,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 10:03:34,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 575 [2023-08-04 10:03:34,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 10:03:34,666 INFO L124 PetriNetUnfolderBase]: 1121/1720 cut-off events. [2023-08-04 10:03:34,667 INFO L125 PetriNetUnfolderBase]: For 139/139 co-relation queries the response was YES. [2023-08-04 10:03:34,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3668 conditions, 1720 events. 1121/1720 cut-off events. For 139/139 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7863 event pairs, 431 based on Foata normal form. 0/1296 useless extension candidates. Maximal degree in co-relation 1588. Up to 1050 conditions per place. [2023-08-04 10:03:34,675 INFO L140 encePairwiseOnDemand]: 572/575 looper letters, 73 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2023-08-04 10:03:34,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 80 transitions, 338 flow [2023-08-04 10:03:34,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 10:03:34,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 10:03:34,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 820 transitions. [2023-08-04 10:03:34,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4753623188405797 [2023-08-04 10:03:34,678 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 820 transitions. [2023-08-04 10:03:34,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 820 transitions. [2023-08-04 10:03:34,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 10:03:34,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 820 transitions. [2023-08-04 10:03:34,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 273.3333333333333) internal successors, (820), 3 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 10:03:34,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 575.0) internal successors, (2300), 4 states have internal predecessors, (2300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 10:03:34,684 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 575.0) internal successors, (2300), 4 states have internal predecessors, (2300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 10:03:34,685 INFO L175 Difference]: Start difference. First operand has 47 places, 51 transitions, 126 flow. Second operand 3 states and 820 transitions. [2023-08-04 10:03:34,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 80 transitions, 338 flow [2023-08-04 10:03:34,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 80 transitions, 334 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 10:03:34,687 INFO L231 Difference]: Finished difference. Result has 48 places, 52 transitions, 134 flow [2023-08-04 10:03:34,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=575, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=48, PETRI_TRANSITIONS=52} [2023-08-04 10:03:34,688 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -2 predicate places. [2023-08-04 10:03:34,688 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 52 transitions, 134 flow [2023-08-04 10:03:34,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 252.0) internal successors, (756), 3 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 10:03:34,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 10:03:34,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 10:03:34,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 10:03:34,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-04 10:03:34,895 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 10:03:34,895 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 10:03:34,895 INFO L85 PathProgramCache]: Analyzing trace with hash 2081799633, now seen corresponding path program 1 times [2023-08-04 10:03:34,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 10:03:34,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020200544] [2023-08-04 10:03:34,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 10:03:34,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 10:03:34,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 10:03:34,992 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 10:03:34,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 10:03:34,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020200544] [2023-08-04 10:03:34,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020200544] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 10:03:34,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844723534] [2023-08-04 10:03:34,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 10:03:34,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 10:03:34,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 10:03:34,995 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 10:03:34,997 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 10:03:35,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 10:03:35,090 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 10:03:35,091 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 10:03:35,097 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 10:03:35,097 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 10:03:35,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844723534] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 10:03:35,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 10:03:35,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 10:03:35,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956239231] [2023-08-04 10:03:35,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 10:03:35,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 10:03:35,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 10:03:35,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 10:03:35,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 10:03:35,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 575 [2023-08-04 10:03:35,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 52 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 253.33333333333334) internal successors, (760), 3 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 10:03:35,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 10:03:35,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 575 [2023-08-04 10:03:35,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 10:03:35,327 INFO L124 PetriNetUnfolderBase]: 1068/1638 cut-off events. [2023-08-04 10:03:35,328 INFO L125 PetriNetUnfolderBase]: For 428/428 co-relation queries the response was YES. [2023-08-04 10:03:35,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3578 conditions, 1638 events. 1068/1638 cut-off events. For 428/428 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 7270 event pairs, 643 based on Foata normal form. 0/1276 useless extension candidates. Maximal degree in co-relation 1627. Up to 1480 conditions per place. [2023-08-04 10:03:35,335 INFO L140 encePairwiseOnDemand]: 572/575 looper letters, 69 selfloop transitions, 2 changer transitions 2/78 dead transitions. [2023-08-04 10:03:35,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 78 transitions, 332 flow [2023-08-04 10:03:35,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 10:03:35,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 10:03:35,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 817 transitions. [2023-08-04 10:03:35,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4736231884057971 [2023-08-04 10:03:35,338 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 817 transitions. [2023-08-04 10:03:35,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 817 transitions. [2023-08-04 10:03:35,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 10:03:35,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 817 transitions. [2023-08-04 10:03:35,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 272.3333333333333) internal successors, (817), 3 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 10:03:35,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 575.0) internal successors, (2300), 4 states have internal predecessors, (2300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 10:03:35,345 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 575.0) internal successors, (2300), 4 states have internal predecessors, (2300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 10:03:35,345 INFO L175 Difference]: Start difference. First operand has 48 places, 52 transitions, 134 flow. Second operand 3 states and 817 transitions. [2023-08-04 10:03:35,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 78 transitions, 332 flow [2023-08-04 10:03:35,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 78 transitions, 330 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 10:03:35,348 INFO L231 Difference]: Finished difference. Result has 50 places, 51 transitions, 136 flow [2023-08-04 10:03:35,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=575, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=50, PETRI_TRANSITIONS=51} [2023-08-04 10:03:35,349 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2023-08-04 10:03:35,349 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 51 transitions, 136 flow [2023-08-04 10:03:35,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 253.33333333333334) internal successors, (760), 3 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 10:03:35,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 10:03:35,350 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] [2023-08-04 10:03:35,366 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 10:03:35,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 10:03:35,564 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 10:03:35,564 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 10:03:35,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1749274861, now seen corresponding path program 1 times [2023-08-04 10:03:35,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 10:03:35,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352419911] [2023-08-04 10:03:35,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 10:03:35,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 10:03:35,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 10:03:35,659 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 10:03:35,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 10:03:35,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352419911] [2023-08-04 10:03:35,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352419911] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 10:03:35,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064830253] [2023-08-04 10:03:35,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 10:03:35,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 10:03:35,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 10:03:35,667 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 10:03:35,676 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 10:03:35,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 10:03:35,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 10:03:35,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 10:03:35,796 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 10:03:35,796 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 10:03:35,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064830253] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 10:03:35,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 10:03:35,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 10:03:35,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697364063] [2023-08-04 10:03:35,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 10:03:35,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 10:03:35,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 10:03:35,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 10:03:35,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 10:03:35,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 575 [2023-08-04 10:03:35,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 51 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 255.33333333333334) internal successors, (766), 3 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 10:03:35,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 10:03:35,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 575 [2023-08-04 10:03:35,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 10:03:35,993 INFO L124 PetriNetUnfolderBase]: 1068/1635 cut-off events. [2023-08-04 10:03:35,993 INFO L125 PetriNetUnfolderBase]: For 288/288 co-relation queries the response was YES. [2023-08-04 10:03:35,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3574 conditions, 1635 events. 1068/1635 cut-off events. For 288/288 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 7201 event pairs, 687 based on Foata normal form. 1/1275 useless extension candidates. Maximal degree in co-relation 3277. Up to 1592 conditions per place. [2023-08-04 10:03:36,001 INFO L140 encePairwiseOnDemand]: 572/575 looper letters, 45 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2023-08-04 10:03:36,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 52 transitions, 232 flow [2023-08-04 10:03:36,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 10:03:36,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 10:03:36,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 792 transitions. [2023-08-04 10:03:36,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4591304347826087 [2023-08-04 10:03:36,004 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 792 transitions. [2023-08-04 10:03:36,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 792 transitions. [2023-08-04 10:03:36,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 10:03:36,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 792 transitions. [2023-08-04 10:03:36,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 264.0) internal successors, (792), 3 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 10:03:36,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 575.0) internal successors, (2300), 4 states have internal predecessors, (2300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 10:03:36,010 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 575.0) internal successors, (2300), 4 states have internal predecessors, (2300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 10:03:36,010 INFO L175 Difference]: Start difference. First operand has 50 places, 51 transitions, 136 flow. Second operand 3 states and 792 transitions. [2023-08-04 10:03:36,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 52 transitions, 232 flow [2023-08-04 10:03:36,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 52 transitions, 228 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 10:03:36,015 INFO L231 Difference]: Finished difference. Result has 51 places, 52 transitions, 144 flow [2023-08-04 10:03:36,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=575, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=51, PETRI_TRANSITIONS=52} [2023-08-04 10:03:36,018 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 1 predicate places. [2023-08-04 10:03:36,018 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 52 transitions, 144 flow [2023-08-04 10:03:36,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 255.33333333333334) internal successors, (766), 3 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 10:03:36,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 10:03:36,019 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 10:03:36,028 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 10:03:36,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 10:03:36,228 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 10:03:36,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 10:03:36,228 INFO L85 PathProgramCache]: Analyzing trace with hash 601941664, now seen corresponding path program 1 times [2023-08-04 10:03:36,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 10:03:36,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689473604] [2023-08-04 10:03:36,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 10:03:36,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 10:03:36,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 10:03:36,291 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 10:03:36,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 10:03:36,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689473604] [2023-08-04 10:03:36,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689473604] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 10:03:36,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880779808] [2023-08-04 10:03:36,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 10:03:36,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 10:03:36,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 10:03:36,293 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 10:03:36,316 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 10:03:36,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 10:03:36,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 10:03:36,384 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 10:03:36,407 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 10:03:36,407 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 10:03:36,433 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 10:03:36,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880779808] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 10:03:36,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 10:03:36,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 10:03:36,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772867301] [2023-08-04 10:03:36,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 10:03:36,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 10:03:36,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 10:03:36,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 10:03:36,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 10:03:36,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 575 [2023-08-04 10:03:36,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 52 transitions, 144 flow. Second operand has 5 states, 5 states have (on average 252.6) internal successors, (1263), 5 states have internal predecessors, (1263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 10:03:36,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 10:03:36,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 575 [2023-08-04 10:03:36,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 10:03:36,481 INFO L124 PetriNetUnfolderBase]: 11/27 cut-off events. [2023-08-04 10:03:36,481 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 10:03:36,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72 conditions, 27 events. 11/27 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 43 event pairs, 1 based on Foata normal form. 4/26 useless extension candidates. Maximal degree in co-relation 62. Up to 17 conditions per place. [2023-08-04 10:03:36,482 INFO L140 encePairwiseOnDemand]: 572/575 looper letters, 0 selfloop transitions, 0 changer transitions 15/15 dead transitions. [2023-08-04 10:03:36,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 15 transitions, 72 flow [2023-08-04 10:03:36,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 10:03:36,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 10:03:36,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1002 transitions. [2023-08-04 10:03:36,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4356521739130435 [2023-08-04 10:03:36,485 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1002 transitions. [2023-08-04 10:03:36,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1002 transitions. [2023-08-04 10:03:36,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 10:03:36,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1002 transitions. [2023-08-04 10:03:36,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 250.5) internal successors, (1002), 4 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 10:03:36,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 575.0) internal successors, (2875), 5 states have internal predecessors, (2875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 10:03:36,493 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 575.0) internal successors, (2875), 5 states have internal predecessors, (2875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 10:03:36,493 INFO L175 Difference]: Start difference. First operand has 51 places, 52 transitions, 144 flow. Second operand 4 states and 1002 transitions. [2023-08-04 10:03:36,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 15 transitions, 72 flow [2023-08-04 10:03:36,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 15 transitions, 66 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 10:03:36,494 INFO L231 Difference]: Finished difference. Result has 19 places, 0 transitions, 0 flow [2023-08-04 10:03:36,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=575, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=19, PETRI_TRANSITIONS=0} [2023-08-04 10:03:36,496 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, -31 predicate places. [2023-08-04 10:03:36,496 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 0 transitions, 0 flow [2023-08-04 10:03:36,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 252.6) internal successors, (1263), 5 states have internal predecessors, (1263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 10:03:36,499 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 10:03:36,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 10:03:36,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 10:03:36,707 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-08-04 10:03:36,709 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 10:03:36,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 253 places, 280 transitions, 582 flow [2023-08-04 10:03:36,760 INFO L124 PetriNetUnfolderBase]: 64/541 cut-off events. [2023-08-04 10:03:36,761 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 10:03:36,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 561 conditions, 541 events. 64/541 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2286 event pairs, 0 based on Foata normal form. 0/467 useless extension candidates. Maximal degree in co-relation 281. Up to 8 conditions per place. [2023-08-04 10:03:36,764 INFO L82 GeneralOperation]: Start removeDead. Operand has 253 places, 280 transitions, 582 flow [2023-08-04 10:03:36,766 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 253 places, 280 transitions, 582 flow [2023-08-04 10:03:36,767 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 10:03:36,767 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 253 places, 280 transitions, 582 flow [2023-08-04 10:03:36,767 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 253 places, 280 transitions, 582 flow [2023-08-04 10:03:36,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 253 places, 280 transitions, 582 flow [2023-08-04 10:03:36,808 INFO L124 PetriNetUnfolderBase]: 64/541 cut-off events. [2023-08-04 10:03:36,808 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 10:03:36,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 561 conditions, 541 events. 64/541 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2286 event pairs, 0 based on Foata normal form. 0/467 useless extension candidates. Maximal degree in co-relation 281. Up to 8 conditions per place. [2023-08-04 10:03:36,824 INFO L119 LiptonReduction]: Number of co-enabled transitions 19910 [2023-08-04 10:03:41,904 INFO L134 LiptonReduction]: Checked pairs total: 26949 [2023-08-04 10:03:41,904 INFO L136 LiptonReduction]: Total number of compositions: 298 [2023-08-04 10:03:41,906 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 10:03:41,906 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;@1f90479a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 10:03:41,907 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 10:03:41,910 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 10:03:41,910 INFO L124 PetriNetUnfolderBase]: 5/34 cut-off events. [2023-08-04 10:03:41,910 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 10:03:41,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 10:03:41,910 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-04 10:03:41,910 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 10:03:41,911 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 10:03:41,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1653168487, now seen corresponding path program 1 times [2023-08-04 10:03:41,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 10:03:41,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852865544] [2023-08-04 10:03:41,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 10:03:41,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 10:03:41,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 10:03:41,976 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 10:03:41,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 10:03:41,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852865544] [2023-08-04 10:03:41,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852865544] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 10:03:41,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 10:03:41,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 10:03:41,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620557624] [2023-08-04 10:03:41,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 10:03:41,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 10:03:41,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 10:03:41,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 10:03:41,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 10:03:41,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 578 [2023-08-04 10:03:41,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 60 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 249.66666666666666) internal successors, (749), 3 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 10:03:41,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 10:03:41,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 578 [2023-08-04 10:03:41,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 10:03:42,216 INFO L124 PetriNetUnfolderBase]: 1815/2770 cut-off events. [2023-08-04 10:03:42,217 INFO L125 PetriNetUnfolderBase]: For 111/111 co-relation queries the response was YES. [2023-08-04 10:03:42,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5526 conditions, 2770 events. 1815/2770 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 13814 event pairs, 1147 based on Foata normal form. 0/1883 useless extension candidates. Maximal degree in co-relation 4464. Up to 2671 conditions per place. [2023-08-04 10:03:42,226 INFO L140 encePairwiseOnDemand]: 570/578 looper letters, 34 selfloop transitions, 2 changer transitions 13/54 dead transitions. [2023-08-04 10:03:42,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 54 transitions, 224 flow [2023-08-04 10:03:42,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 10:03:42,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 10:03:42,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 797 transitions. [2023-08-04 10:03:42,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4596309111880046 [2023-08-04 10:03:42,229 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 797 transitions. [2023-08-04 10:03:42,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 797 transitions. [2023-08-04 10:03:42,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 10:03:42,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 797 transitions. [2023-08-04 10:03:42,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 265.6666666666667) internal successors, (797), 3 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 10:03:42,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 578.0) internal successors, (2312), 4 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 10:03:42,234 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 578.0) internal successors, (2312), 4 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 10:03:42,234 INFO L175 Difference]: Start difference. First operand has 50 places, 60 transitions, 142 flow. Second operand 3 states and 797 transitions. [2023-08-04 10:03:42,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 54 transitions, 224 flow [2023-08-04 10:03:42,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 54 transitions, 224 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 10:03:42,237 INFO L231 Difference]: Finished difference. Result has 50 places, 41 transitions, 102 flow [2023-08-04 10:03:42,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=578, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=50, PETRI_TRANSITIONS=41} [2023-08-04 10:03:42,238 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2023-08-04 10:03:42,238 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 41 transitions, 102 flow [2023-08-04 10:03:42,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 249.66666666666666) internal successors, (749), 3 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 10:03:42,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 10:03:42,239 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-04 10:03:42,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 10:03:42,239 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 10:03:42,239 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 10:03:42,239 INFO L85 PathProgramCache]: Analyzing trace with hash 2041042186, now seen corresponding path program 1 times [2023-08-04 10:03:42,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 10:03:42,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501060208] [2023-08-04 10:03:42,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 10:03:42,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 10:03:42,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 10:03:42,264 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 10:03:42,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 10:03:42,295 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 10:03:42,295 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 10:03:42,296 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 10:03:42,296 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 10:03:42,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 10:03:42,296 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 10:03:42,297 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-04 10:03:42,297 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 10:03:42,297 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 10:03:42,352 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 10:03:42,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 391 places, 436 transitions, 920 flow [2023-08-04 10:03:42,641 INFO L124 PetriNetUnfolderBase]: 218/1609 cut-off events. [2023-08-04 10:03:42,641 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 10:03:42,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1706 conditions, 1609 events. 218/1609 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 10650 event pairs, 1 based on Foata normal form. 0/1388 useless extension candidates. Maximal degree in co-relation 1000. Up to 32 conditions per place. [2023-08-04 10:03:42,667 INFO L82 GeneralOperation]: Start removeDead. Operand has 391 places, 436 transitions, 920 flow [2023-08-04 10:03:42,681 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 391 places, 436 transitions, 920 flow [2023-08-04 10:03:42,682 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 10:03:42,682 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 391 places, 436 transitions, 920 flow [2023-08-04 10:03:42,682 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 391 places, 436 transitions, 920 flow [2023-08-04 10:03:42,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 391 places, 436 transitions, 920 flow [2023-08-04 10:03:42,952 INFO L124 PetriNetUnfolderBase]: 218/1609 cut-off events. [2023-08-04 10:03:42,953 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 10:03:42,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1706 conditions, 1609 events. 218/1609 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 10650 event pairs, 1 based on Foata normal form. 0/1388 useless extension candidates. Maximal degree in co-relation 1000. Up to 32 conditions per place. [2023-08-04 10:03:43,073 INFO L119 LiptonReduction]: Number of co-enabled transitions 87596 [2023-08-04 10:03:48,566 INFO L134 LiptonReduction]: Checked pairs total: 152478 [2023-08-04 10:03:48,566 INFO L136 LiptonReduction]: Total number of compositions: 422 [2023-08-04 10:03:48,568 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 10:03:48,568 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;@1f90479a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 10:03:48,568 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 10:03:48,570 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 10:03:48,570 INFO L124 PetriNetUnfolderBase]: 1/14 cut-off events. [2023-08-04 10:03:48,570 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 10:03:48,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 10:03:48,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 10:03:48,570 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 10:03:48,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 10:03:48,571 INFO L85 PathProgramCache]: Analyzing trace with hash 328603867, now seen corresponding path program 1 times [2023-08-04 10:03:48,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 10:03:48,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187519833] [2023-08-04 10:03:48,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 10:03:48,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 10:03:48,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 10:03:48,627 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 10:03:48,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 10:03:48,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187519833] [2023-08-04 10:03:48,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187519833] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 10:03:48,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 10:03:48,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 10:03:48,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969202611] [2023-08-04 10:03:48,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 10:03:48,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 10:03:48,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 10:03:48,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 10:03:48,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 10:03:48,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 386 out of 858 [2023-08-04 10:03:48,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 126 transitions, 300 flow. Second operand has 3 states, 3 states have (on average 388.0) internal successors, (1164), 3 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 10:03:48,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 10:03:48,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 386 of 858 [2023-08-04 10:03:48,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand