/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 TOGETHER -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-nzb-file-trans.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 19:44:06,874 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 19:44:06,952 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 19:44:06,957 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 19:44:06,958 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 19:44:06,958 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 19:44:06,958 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 19:44:06,984 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 19:44:06,985 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 19:44:06,989 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 19:44:06,989 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 19:44:06,989 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 19:44:06,990 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 19:44:06,991 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 19:44:06,992 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 19:44:06,992 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 19:44:06,992 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 19:44:06,992 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 19:44:06,993 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 19:44:06,993 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 19:44:06,993 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 19:44:06,993 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 19:44:06,993 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 19:44:06,994 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 19:44:06,994 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 19:44:06,994 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 19:44:06,994 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 19:44:06,995 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 19:44:06,995 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 19:44:06,995 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 19:44:06,996 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 19:44:06,996 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 19:44:06,996 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 19:44:06,996 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 19:44:06,997 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 19:44:06,997 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 19:44:06,997 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 19:44:06,997 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 19:44:06,997 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 19:44:06,997 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 19:44:06,997 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 19:44:06,998 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 19:44:07,245 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 19:44:07,270 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 19:44:07,272 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 19:44:07,273 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 19:44:07,273 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 19:44:07,274 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-nzb-file-trans.wvr_bound2.c [2023-08-03 19:44:08,478 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 19:44:08,652 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 19:44:08,653 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-nzb-file-trans.wvr_bound2.c [2023-08-03 19:44:08,662 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae68e6485/2733182e6cea481f87078b851a240bf7/FLAG4b6f33d7d [2023-08-03 19:44:08,674 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae68e6485/2733182e6cea481f87078b851a240bf7 [2023-08-03 19:44:08,677 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 19:44:08,678 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 19:44:08,679 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 19:44:08,679 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 19:44:08,682 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 19:44:08,683 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 07:44:08" (1/1) ... [2023-08-03 19:44:08,683 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bb5c27d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:44:08, skipping insertion in model container [2023-08-03 19:44:08,684 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 07:44:08" (1/1) ... [2023-08-03 19:44:08,709 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 19:44:08,875 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-nzb-file-trans.wvr_bound2.c[6693,6706] [2023-08-03 19:44:08,880 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 19:44:08,888 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 19:44:08,943 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-nzb-file-trans.wvr_bound2.c[6693,6706] [2023-08-03 19:44:08,947 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 19:44:08,967 INFO L206 MainTranslator]: Completed translation [2023-08-03 19:44:08,967 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:44:08 WrapperNode [2023-08-03 19:44:08,969 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 19:44:08,970 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 19:44:08,970 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 19:44:08,970 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 19:44:08,976 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:44:08" (1/1) ... [2023-08-03 19:44:08,986 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:44:08" (1/1) ... [2023-08-03 19:44:09,033 INFO L138 Inliner]: procedures = 26, calls = 76, calls flagged for inlining = 28, calls inlined = 42, statements flattened = 649 [2023-08-03 19:44:09,033 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 19:44:09,034 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 19:44:09,034 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 19:44:09,034 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 19:44:09,042 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:44:08" (1/1) ... [2023-08-03 19:44:09,042 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:44:08" (1/1) ... [2023-08-03 19:44:09,048 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:44:08" (1/1) ... [2023-08-03 19:44:09,049 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:44:08" (1/1) ... [2023-08-03 19:44:09,072 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:44:08" (1/1) ... [2023-08-03 19:44:09,087 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:44:08" (1/1) ... [2023-08-03 19:44:09,090 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:44:08" (1/1) ... [2023-08-03 19:44:09,093 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:44:08" (1/1) ... [2023-08-03 19:44:09,097 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 19:44:09,098 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 19:44:09,098 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 19:44:09,098 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 19:44:09,109 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:44:08" (1/1) ... [2023-08-03 19:44:09,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 19:44:09,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:44:09,162 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) [2023-08-03 19:44:09,190 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 [2023-08-03 19:44:09,204 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 19:44:09,204 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 19:44:09,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 19:44:09,205 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 19:44:09,205 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-03 19:44:09,205 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-03 19:44:09,206 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-03 19:44:09,206 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-03 19:44:09,206 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-03 19:44:09,206 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-03 19:44:09,206 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 19:44:09,207 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-03 19:44:09,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 19:44:09,208 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 19:44:09,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 19:44:09,210 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-03 19:44:09,360 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 19:44:09,361 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 19:44:10,263 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 19:44:10,280 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 19:44:10,281 INFO L302 CfgBuilder]: Removed 12 assume(true) statements. [2023-08-03 19:44:10,284 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 07:44:10 BoogieIcfgContainer [2023-08-03 19:44:10,284 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 19:44:10,287 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 19:44:10,287 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 19:44:10,290 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 19:44:10,290 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 07:44:08" (1/3) ... [2023-08-03 19:44:10,291 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d7bd2f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 07:44:10, skipping insertion in model container [2023-08-03 19:44:10,292 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:44:08" (2/3) ... [2023-08-03 19:44:10,292 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d7bd2f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 07:44:10, skipping insertion in model container [2023-08-03 19:44:10,292 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 07:44:10" (3/3) ... [2023-08-03 19:44:10,294 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_chl-nzb-file-trans.wvr_bound2.c [2023-08-03 19:44:10,300 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 19:44:10,308 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 19:44:10,308 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 19:44:10,308 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 19:44:10,447 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-03 19:44:10,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 684 places, 765 transitions, 1572 flow [2023-08-03 19:44:11,195 INFO L124 PetriNetUnfolderBase]: 234/1817 cut-off events. [2023-08-03 19:44:11,196 INFO L125 PetriNetUnfolderBase]: For 36/56 co-relation queries the response was YES. [2023-08-03 19:44:11,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1878 conditions, 1817 events. 234/1817 cut-off events. For 36/56 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 12341 event pairs, 0 based on Foata normal form. 0/1573 useless extension candidates. Maximal degree in co-relation 946. Up to 16 conditions per place. [2023-08-03 19:44:11,261 INFO L82 GeneralOperation]: Start removeDead. Operand has 684 places, 765 transitions, 1572 flow [2023-08-03 19:44:11,295 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 684 places, 765 transitions, 1572 flow [2023-08-03 19:44:11,298 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 19:44:11,318 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 684 places, 765 transitions, 1572 flow [2023-08-03 19:44:11,322 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 684 places, 765 transitions, 1572 flow [2023-08-03 19:44:11,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 684 places, 765 transitions, 1572 flow [2023-08-03 19:44:11,835 INFO L124 PetriNetUnfolderBase]: 234/1817 cut-off events. [2023-08-03 19:44:11,835 INFO L125 PetriNetUnfolderBase]: For 36/56 co-relation queries the response was YES. [2023-08-03 19:44:11,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1878 conditions, 1817 events. 234/1817 cut-off events. For 36/56 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 12341 event pairs, 0 based on Foata normal form. 0/1573 useless extension candidates. Maximal degree in co-relation 946. Up to 16 conditions per place. [2023-08-03 19:44:12,027 INFO L119 LiptonReduction]: Number of co-enabled transitions 218088 [2023-08-03 19:44:33,325 INFO L134 LiptonReduction]: Checked pairs total: 267542 [2023-08-03 19:44:33,325 INFO L136 LiptonReduction]: Total number of compositions: 918 [2023-08-03 19:44:33,346 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 19:44:33,352 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;@24e49f5c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 19:44:33,352 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-03 19:44:33,361 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 19:44:33,361 INFO L124 PetriNetUnfolderBase]: 6/40 cut-off events. [2023-08-03 19:44:33,361 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 19:44:33,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:44:33,362 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:44:33,363 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 19:44:33,367 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:44:33,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1769510446, now seen corresponding path program 1 times [2023-08-03 19:44:33,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:44:33,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144404183] [2023-08-03 19:44:33,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:44:33,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:44:33,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:44:33,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 19:44:33,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:44:33,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144404183] [2023-08-03 19:44:33,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144404183] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:44:33,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 19:44:33,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 19:44:33,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920462676] [2023-08-03 19:44:33,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:44:33,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 19:44:33,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:44:33,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 19:44:33,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 19:44:33,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 697 out of 1683 [2023-08-03 19:44:33,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 98 transitions, 238 flow. Second operand has 3 states, 3 states have (on average 699.3333333333334) internal successors, (2098), 3 states have internal predecessors, (2098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:44:33,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:44:33,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 697 of 1683 [2023-08-03 19:44:33,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:44:44,265 INFO L124 PetriNetUnfolderBase]: 110493/141285 cut-off events. [2023-08-03 19:44:44,265 INFO L125 PetriNetUnfolderBase]: For 5106/5106 co-relation queries the response was YES. [2023-08-03 19:44:44,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 283542 conditions, 141285 events. 110493/141285 cut-off events. For 5106/5106 co-relation queries the response was YES. Maximal size of possible extension queue 2629. Compared 733792 event pairs, 71640 based on Foata normal form. 0/92781 useless extension candidates. Maximal degree in co-relation 263068. Up to 139997 conditions per place. [2023-08-03 19:44:44,971 INFO L140 encePairwiseOnDemand]: 1675/1683 looper letters, 88 selfloop transitions, 6 changer transitions 0/100 dead transitions. [2023-08-03 19:44:44,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 100 transitions, 430 flow [2023-08-03 19:44:44,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 19:44:44,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 19:44:44,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2189 transitions. [2023-08-03 19:44:44,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4335511982570806 [2023-08-03 19:44:44,991 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2189 transitions. [2023-08-03 19:44:44,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2189 transitions. [2023-08-03 19:44:44,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:44:44,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2189 transitions. [2023-08-03 19:44:45,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 729.6666666666666) internal successors, (2189), 3 states have internal predecessors, (2189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:44:45,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1683.0) internal successors, (6732), 4 states have internal predecessors, (6732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:44:45,026 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1683.0) internal successors, (6732), 4 states have internal predecessors, (6732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:44:45,028 INFO L175 Difference]: Start difference. First operand has 75 places, 98 transitions, 238 flow. Second operand 3 states and 2189 transitions. [2023-08-03 19:44:45,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 100 transitions, 430 flow [2023-08-03 19:44:45,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 100 transitions, 430 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 19:44:45,044 INFO L231 Difference]: Finished difference. Result has 77 places, 100 transitions, 268 flow [2023-08-03 19:44:45,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1683, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=268, PETRI_PLACES=77, PETRI_TRANSITIONS=100} [2023-08-03 19:44:45,050 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 2 predicate places. [2023-08-03 19:44:45,050 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 100 transitions, 268 flow [2023-08-03 19:44:45,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 699.3333333333334) internal successors, (2098), 3 states have internal predecessors, (2098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:44:45,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:44:45,052 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:44:45,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 19:44:45,053 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 19:44:45,053 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:44:45,053 INFO L85 PathProgramCache]: Analyzing trace with hash 792332941, now seen corresponding path program 1 times [2023-08-03 19:44:45,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:44:45,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012604309] [2023-08-03 19:44:45,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:44:45,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:44:45,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:44:45,225 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-03 19:44:45,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:44:45,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012604309] [2023-08-03 19:44:45,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012604309] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:44:45,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056609536] [2023-08-03 19:44:45,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:44:45,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:44:45,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:44:45,229 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) [2023-08-03 19:44:45,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 19:44:45,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:44:45,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-03 19:44:45,374 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:44:45,470 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-03 19:44:45,470 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 19:44:45,499 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-03 19:44:45,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056609536] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 19:44:45,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 19:44:45,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-08-03 19:44:45,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003736878] [2023-08-03 19:44:45,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 19:44:45,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-03 19:44:45,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:44:45,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-03 19:44:45,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2023-08-03 19:44:45,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 691 out of 1683 [2023-08-03 19:44:45,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 100 transitions, 268 flow. Second operand has 8 states, 8 states have (on average 693.0) internal successors, (5544), 8 states have internal predecessors, (5544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:44:45,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:44:45,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 691 of 1683 [2023-08-03 19:44:45,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:44:55,475 INFO L124 PetriNetUnfolderBase]: 110493/141294 cut-off events. [2023-08-03 19:44:55,475 INFO L125 PetriNetUnfolderBase]: For 5082/5082 co-relation queries the response was YES. [2023-08-03 19:44:55,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 283584 conditions, 141294 events. 110493/141294 cut-off events. For 5082/5082 co-relation queries the response was YES. Maximal size of possible extension queue 2636. Compared 733653 event pairs, 71640 based on Foata normal form. 6/92798 useless extension candidates. Maximal degree in co-relation 283532. Up to 139997 conditions per place. [2023-08-03 19:44:56,193 INFO L140 encePairwiseOnDemand]: 1676/1683 looper letters, 88 selfloop transitions, 15 changer transitions 0/109 dead transitions. [2023-08-03 19:44:56,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 109 transitions, 510 flow [2023-08-03 19:44:56,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-03 19:44:56,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-03 19:44:56,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 4258 transitions. [2023-08-03 19:44:56,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4216676569617746 [2023-08-03 19:44:56,214 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 4258 transitions. [2023-08-03 19:44:56,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 4258 transitions. [2023-08-03 19:44:56,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:44:56,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 4258 transitions. [2023-08-03 19:44:56,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 709.6666666666666) internal successors, (4258), 6 states have internal predecessors, (4258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:44:56,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 1683.0) internal successors, (11781), 7 states have internal predecessors, (11781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:44:56,251 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 1683.0) internal successors, (11781), 7 states have internal predecessors, (11781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:44:56,251 INFO L175 Difference]: Start difference. First operand has 77 places, 100 transitions, 268 flow. Second operand 6 states and 4258 transitions. [2023-08-03 19:44:56,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 109 transitions, 510 flow [2023-08-03 19:44:56,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 109 transitions, 504 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 19:44:56,264 INFO L231 Difference]: Finished difference. Result has 84 places, 109 transitions, 358 flow [2023-08-03 19:44:56,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1683, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=358, PETRI_PLACES=84, PETRI_TRANSITIONS=109} [2023-08-03 19:44:56,265 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 9 predicate places. [2023-08-03 19:44:56,265 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 109 transitions, 358 flow [2023-08-03 19:44:56,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 693.0) internal successors, (5544), 8 states have internal predecessors, (5544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:44:56,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:44:56,269 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:44:56,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-03 19:44:56,479 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 [2023-08-03 19:44:56,479 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 19:44:56,479 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:44:56,480 INFO L85 PathProgramCache]: Analyzing trace with hash -821312494, now seen corresponding path program 2 times [2023-08-03 19:44:56,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:44:56,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569413344] [2023-08-03 19:44:56,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:44:56,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:44:56,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:44:56,694 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-03 19:44:56,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:44:56,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569413344] [2023-08-03 19:44:56,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569413344] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:44:56,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93256412] [2023-08-03 19:44:56,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 19:44:56,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:44:56,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:44:56,700 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) [2023-08-03 19:44:56,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-03 19:44:56,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-03 19:44:56,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 19:44:56,851 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-03 19:44:56,853 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:44:56,935 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-03 19:44:56,935 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 19:44:57,003 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-03 19:44:57,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93256412] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 19:44:57,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 19:44:57,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-08-03 19:44:57,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231532800] [2023-08-03 19:44:57,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 19:44:57,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-03 19:44:57,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:44:57,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-03 19:44:57,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2023-08-03 19:44:57,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 691 out of 1683 [2023-08-03 19:44:57,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 109 transitions, 358 flow. Second operand has 17 states, 17 states have (on average 692.4705882352941) internal successors, (11772), 17 states have internal predecessors, (11772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:44:57,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:44:57,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 691 of 1683 [2023-08-03 19:44:57,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:45:07,485 INFO L124 PetriNetUnfolderBase]: 110493/141297 cut-off events. [2023-08-03 19:45:07,485 INFO L125 PetriNetUnfolderBase]: For 5086/5086 co-relation queries the response was YES. [2023-08-03 19:45:07,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 283626 conditions, 141297 events. 110493/141297 cut-off events. For 5086/5086 co-relation queries the response was YES. Maximal size of possible extension queue 2636. Compared 733866 event pairs, 71640 based on Foata normal form. 1/92795 useless extension candidates. Maximal degree in co-relation 283523. Up to 139997 conditions per place. [2023-08-03 19:45:08,241 INFO L140 encePairwiseOnDemand]: 1676/1683 looper letters, 88 selfloop transitions, 18 changer transitions 0/112 dead transitions. [2023-08-03 19:45:08,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 112 transitions, 588 flow [2023-08-03 19:45:08,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-03 19:45:08,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-03 19:45:08,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 4946 transitions. [2023-08-03 19:45:08,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4198285374755963 [2023-08-03 19:45:08,252 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 4946 transitions. [2023-08-03 19:45:08,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 4946 transitions. [2023-08-03 19:45:08,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:45:08,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 4946 transitions. [2023-08-03 19:45:08,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 706.5714285714286) internal successors, (4946), 7 states have internal predecessors, (4946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:45:08,461 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 1683.0) internal successors, (13464), 8 states have internal predecessors, (13464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:45:08,464 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 1683.0) internal successors, (13464), 8 states have internal predecessors, (13464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:45:08,464 INFO L175 Difference]: Start difference. First operand has 84 places, 109 transitions, 358 flow. Second operand 7 states and 4946 transitions. [2023-08-03 19:45:08,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 112 transitions, 588 flow [2023-08-03 19:45:08,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 112 transitions, 564 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-03 19:45:08,483 INFO L231 Difference]: Finished difference. Result has 90 places, 112 transitions, 402 flow [2023-08-03 19:45:08,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1683, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=402, PETRI_PLACES=90, PETRI_TRANSITIONS=112} [2023-08-03 19:45:08,485 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 15 predicate places. [2023-08-03 19:45:08,485 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 112 transitions, 402 flow [2023-08-03 19:45:08,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 692.4705882352941) internal successors, (11772), 17 states have internal predecessors, (11772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:45:08,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:45:08,488 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:45:08,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-03 19:45:08,694 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 [2023-08-03 19:45:08,694 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 19:45:08,694 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:45:08,694 INFO L85 PathProgramCache]: Analyzing trace with hash 857772109, now seen corresponding path program 3 times [2023-08-03 19:45:08,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:45:08,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484968800] [2023-08-03 19:45:08,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:45:08,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:45:08,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 19:45:08,740 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 19:45:08,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 19:45:08,788 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 19:45:08,788 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 19:45:08,789 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-03 19:45:08,791 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-03 19:45:08,791 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-03 19:45:08,791 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-03 19:45:08,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-03 19:45:08,791 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-03 19:45:08,793 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 19:45:08,793 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 19:45:08,883 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-03 19:45:08,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1101 places, 1245 transitions, 2580 flow [2023-08-03 19:45:12,529 INFO L124 PetriNetUnfolderBase]: 1366/8080 cut-off events. [2023-08-03 19:45:12,529 INFO L125 PetriNetUnfolderBase]: For 602/678 co-relation queries the response was YES. [2023-08-03 19:45:12,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8754 conditions, 8080 events. 1366/8080 cut-off events. For 602/678 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 81685 event pairs, 22 based on Foata normal form. 0/6958 useless extension candidates. Maximal degree in co-relation 5092. Up to 192 conditions per place. [2023-08-03 19:45:12,886 INFO L82 GeneralOperation]: Start removeDead. Operand has 1101 places, 1245 transitions, 2580 flow [2023-08-03 19:45:13,060 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1101 places, 1245 transitions, 2580 flow [2023-08-03 19:45:13,061 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 19:45:13,061 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1101 places, 1245 transitions, 2580 flow [2023-08-03 19:45:13,065 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1101 places, 1245 transitions, 2580 flow [2023-08-03 19:45:13,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1101 places, 1245 transitions, 2580 flow [2023-08-03 19:45:16,593 INFO L124 PetriNetUnfolderBase]: 1366/8080 cut-off events. [2023-08-03 19:45:16,593 INFO L125 PetriNetUnfolderBase]: For 602/678 co-relation queries the response was YES. [2023-08-03 19:45:16,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8754 conditions, 8080 events. 1366/8080 cut-off events. For 602/678 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 81685 event pairs, 22 based on Foata normal form. 0/6958 useless extension candidates. Maximal degree in co-relation 5092. Up to 192 conditions per place. [2023-08-03 19:45:18,201 INFO L119 LiptonReduction]: Number of co-enabled transitions 893880 [2023-08-03 19:45:45,563 INFO L134 LiptonReduction]: Checked pairs total: 1674354 [2023-08-03 19:45:45,563 INFO L136 LiptonReduction]: Total number of compositions: 1347 [2023-08-03 19:45:45,566 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 19:45:45,566 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;@24e49f5c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 19:45:45,567 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-03 19:45:45,571 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 19:45:45,571 INFO L124 PetriNetUnfolderBase]: 4/40 cut-off events. [2023-08-03 19:45:45,571 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-03 19:45:45,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:45:45,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:45:45,571 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 19:45:45,572 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:45:45,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1946730677, now seen corresponding path program 1 times [2023-08-03 19:45:45,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:45:45,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999311309] [2023-08-03 19:45:45,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:45:45,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:45:45,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:45:45,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 19:45:45,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:45:45,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999311309] [2023-08-03 19:45:45,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999311309] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:45:45,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 19:45:45,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 19:45:45,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909898246] [2023-08-03 19:45:45,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:45:45,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 19:45:45,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:45:45,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 19:45:45,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 19:45:45,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1138 out of 2592 [2023-08-03 19:45:45,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 290 transitions, 670 flow. Second operand has 3 states, 3 states have (on average 1141.3333333333333) internal successors, (3424), 3 states have internal predecessors, (3424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:45:45,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:45:45,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1138 of 2592 [2023-08-03 19:45:45,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand