/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-nzb-file-subst.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 02:09:02,517 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 02:09:02,572 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 02:09:02,576 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 02:09:02,577 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 02:09:02,577 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 02:09:02,577 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 02:09:02,612 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 02:09:02,613 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 02:09:02,617 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 02:09:02,617 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 02:09:02,617 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 02:09:02,618 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 02:09:02,620 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 02:09:02,620 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 02:09:02,620 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 02:09:02,620 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 02:09:02,620 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 02:09:02,621 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 02:09:02,621 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 02:09:02,621 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 02:09:02,621 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 02:09:02,622 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 02:09:02,622 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 02:09:02,623 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 02:09:02,623 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 02:09:02,623 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 02:09:02,624 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 02:09:02,624 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 02:09:02,624 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 02:09:02,624 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:09:02,624 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 02:09:02,625 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 02:09:02,625 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 02:09:02,625 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 02:09:02,625 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 02:09:02,626 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 02:09:02,626 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 02:09:02,626 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 02:09:02,626 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 02:09:02,626 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 02:09:02,626 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 02:09:02,864 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 02:09:02,892 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 02:09:02,894 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 02:09:02,895 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 02:09:02,896 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 02:09:02,897 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-nzb-file-subst.wvr_bound2.c [2023-08-04 02:09:04,021 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 02:09:04,206 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 02:09:04,207 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-nzb-file-subst.wvr_bound2.c [2023-08-04 02:09:04,215 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abc8859cb/7854ca65838948fcb2695f76c2774018/FLAG17413e7db [2023-08-04 02:09:04,227 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abc8859cb/7854ca65838948fcb2695f76c2774018 [2023-08-04 02:09:04,229 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 02:09:04,231 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 02:09:04,232 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 02:09:04,232 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 02:09:04,235 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 02:09:04,236 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:09:04" (1/1) ... [2023-08-04 02:09:04,236 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@606de664 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:09:04, skipping insertion in model container [2023-08-04 02:09:04,236 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:09:04" (1/1) ... [2023-08-04 02:09:04,278 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 02:09:04,443 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-subst.wvr_bound2.c[6744,6757] [2023-08-04 02:09:04,454 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:09:04,463 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 02:09:04,500 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-subst.wvr_bound2.c[6744,6757] [2023-08-04 02:09:04,504 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:09:04,516 INFO L206 MainTranslator]: Completed translation [2023-08-04 02:09:04,517 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:09:04 WrapperNode [2023-08-04 02:09:04,517 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 02:09:04,518 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 02:09:04,518 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 02:09:04,518 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 02:09:04,525 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:09:04" (1/1) ... [2023-08-04 02:09:04,537 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:09:04" (1/1) ... [2023-08-04 02:09:04,582 INFO L138 Inliner]: procedures = 26, calls = 76, calls flagged for inlining = 28, calls inlined = 42, statements flattened = 649 [2023-08-04 02:09:04,583 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 02:09:04,583 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 02:09:04,584 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 02:09:04,584 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 02:09:04,592 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:09:04" (1/1) ... [2023-08-04 02:09:04,592 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:09:04" (1/1) ... [2023-08-04 02:09:04,598 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:09:04" (1/1) ... [2023-08-04 02:09:04,599 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:09:04" (1/1) ... [2023-08-04 02:09:04,619 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:09:04" (1/1) ... [2023-08-04 02:09:04,627 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:09:04" (1/1) ... [2023-08-04 02:09:04,630 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:09:04" (1/1) ... [2023-08-04 02:09:04,633 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:09:04" (1/1) ... [2023-08-04 02:09:04,639 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 02:09:04,640 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 02:09:04,640 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 02:09:04,640 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 02:09:04,641 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:09:04" (1/1) ... [2023-08-04 02:09:04,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:09:04,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:09:04,678 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 02:09:04,685 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 02:09:04,715 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 02:09:04,715 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 02:09:04,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 02:09:04,715 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 02:09:04,715 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 02:09:04,716 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 02:09:04,716 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 02:09:04,716 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 02:09:04,716 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 02:09:04,716 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 02:09:04,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 02:09:04,716 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 02:09:04,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 02:09:04,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 02:09:04,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 02:09:04,718 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 02:09:04,838 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 02:09:04,840 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 02:09:05,589 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 02:09:05,604 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 02:09:05,604 INFO L302 CfgBuilder]: Removed 12 assume(true) statements. [2023-08-04 02:09:05,608 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:09:05 BoogieIcfgContainer [2023-08-04 02:09:05,608 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 02:09:05,611 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 02:09:05,611 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 02:09:05,614 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 02:09:05,614 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 02:09:04" (1/3) ... [2023-08-04 02:09:05,615 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ab9832e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:09:05, skipping insertion in model container [2023-08-04 02:09:05,616 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:09:04" (2/3) ... [2023-08-04 02:09:05,616 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ab9832e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:09:05, skipping insertion in model container [2023-08-04 02:09:05,616 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:09:05" (3/3) ... [2023-08-04 02:09:05,618 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_chl-nzb-file-subst.wvr_bound2.c [2023-08-04 02:09:05,627 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 02:09:05,635 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 02:09:05,635 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 02:09:05,635 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 02:09:05,810 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 02:09:05,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 684 places, 765 transitions, 1572 flow [2023-08-04 02:09:06,557 INFO L124 PetriNetUnfolderBase]: 234/1817 cut-off events. [2023-08-04 02:09:06,557 INFO L125 PetriNetUnfolderBase]: For 36/56 co-relation queries the response was YES. [2023-08-04 02:09:06,625 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. [2023-08-04 02:09:06,625 INFO L82 GeneralOperation]: Start removeDead. Operand has 684 places, 765 transitions, 1572 flow [2023-08-04 02:09:06,662 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 684 places, 765 transitions, 1572 flow [2023-08-04 02:09:06,666 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:09:06,682 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 684 places, 765 transitions, 1572 flow [2023-08-04 02:09:06,684 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 684 places, 765 transitions, 1572 flow [2023-08-04 02:09:06,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 684 places, 765 transitions, 1572 flow [2023-08-04 02:09:07,222 INFO L124 PetriNetUnfolderBase]: 234/1817 cut-off events. [2023-08-04 02:09:07,222 INFO L125 PetriNetUnfolderBase]: For 36/56 co-relation queries the response was YES. [2023-08-04 02:09:07,276 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. [2023-08-04 02:09:07,409 INFO L119 LiptonReduction]: Number of co-enabled transitions 218088 [2023-08-04 02:09:28,942 INFO L134 LiptonReduction]: Checked pairs total: 267542 [2023-08-04 02:09:28,942 INFO L136 LiptonReduction]: Total number of compositions: 918 [2023-08-04 02:09:28,955 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:09:28,961 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;@12254f0c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:09:28,961 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 02:09:28,968 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:09:28,969 INFO L124 PetriNetUnfolderBase]: 6/40 cut-off events. [2023-08-04 02:09:28,969 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 02:09:28,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:09:28,970 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:09:28,971 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:09:28,975 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:09:28,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1769510446, now seen corresponding path program 1 times [2023-08-04 02:09:28,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:09:28,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076168010] [2023-08-04 02:09:28,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:09:28,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:09:29,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:09:29,403 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 02:09:29,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:09:29,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076168010] [2023-08-04 02:09:29,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076168010] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:09:29,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:09:29,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 02:09:29,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800790394] [2023-08-04 02:09:29,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:09:29,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:09:29,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:09:29,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:09:29,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:09:29,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 697 out of 1683 [2023-08-04 02:09:29,519 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) [2023-08-04 02:09:29,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:09:29,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 697 of 1683 [2023-08-04 02:09:29,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:09:40,029 INFO L124 PetriNetUnfolderBase]: 110493/141285 cut-off events. [2023-08-04 02:09:40,029 INFO L125 PetriNetUnfolderBase]: For 5106/5106 co-relation queries the response was YES. [2023-08-04 02:09:40,241 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. [2023-08-04 02:09:40,468 INFO L140 encePairwiseOnDemand]: 1675/1683 looper letters, 69 selfloop transitions, 6 changer transitions 22/100 dead transitions. [2023-08-04 02:09:40,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 100 transitions, 430 flow [2023-08-04 02:09:40,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:09:40,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:09:40,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2189 transitions. [2023-08-04 02:09:40,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4335511982570806 [2023-08-04 02:09:40,495 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2189 transitions. [2023-08-04 02:09:40,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2189 transitions. [2023-08-04 02:09:40,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:09:40,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2189 transitions. [2023-08-04 02:09:40,513 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) [2023-08-04 02:09:40,530 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) [2023-08-04 02:09:40,533 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) [2023-08-04 02:09:40,535 INFO L175 Difference]: Start difference. First operand has 75 places, 98 transitions, 238 flow. Second operand 3 states and 2189 transitions. [2023-08-04 02:09:40,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 100 transitions, 430 flow [2023-08-04 02:09:40,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 100 transitions, 430 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 02:09:40,551 INFO L231 Difference]: Finished difference. Result has 77 places, 78 transitions, 197 flow [2023-08-04 02:09:40,553 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=197, PETRI_PLACES=77, PETRI_TRANSITIONS=78} [2023-08-04 02:09:40,558 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 2 predicate places. [2023-08-04 02:09:40,558 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 78 transitions, 197 flow [2023-08-04 02:09:40,560 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) [2023-08-04 02:09:40,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:09:40,560 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:09:40,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 02:09:40,561 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:09:40,562 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:09:40,562 INFO L85 PathProgramCache]: Analyzing trace with hash 792332941, now seen corresponding path program 1 times [2023-08-04 02:09:40,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:09:40,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751487401] [2023-08-04 02:09:40,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:09:40,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:09:40,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:09:40,719 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 02:09:40,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:09:40,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751487401] [2023-08-04 02:09:40,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751487401] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:09:40,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504274926] [2023-08-04 02:09:40,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:09:40,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:09:40,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:09:40,729 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 02:09:40,759 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 02:09:40,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:09:40,881 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 02:09:40,885 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:09:40,943 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 02:09:40,943 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:09:40,965 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 02:09:40,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504274926] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:09:40,966 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:09:40,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-08-04 02:09:40,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079599073] [2023-08-04 02:09:40,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:09:40,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 02:09:40,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:09:40,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 02:09:40,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2023-08-04 02:09:41,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 691 out of 1683 [2023-08-04 02:09:41,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 78 transitions, 197 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) [2023-08-04 02:09:41,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:09:41,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 691 of 1683 [2023-08-04 02:09:41,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:09:44,184 INFO L124 PetriNetUnfolderBase]: 30267/39000 cut-off events. [2023-08-04 02:09:44,184 INFO L125 PetriNetUnfolderBase]: For 198/198 co-relation queries the response was YES. [2023-08-04 02:09:44,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78451 conditions, 39000 events. 30267/39000 cut-off events. For 198/198 co-relation queries the response was YES. Maximal size of possible extension queue 736. Compared 175260 event pairs, 19332 based on Foata normal form. 6/27863 useless extension candidates. Maximal degree in co-relation 78399. Up to 38922 conditions per place. [2023-08-04 02:09:44,404 INFO L140 encePairwiseOnDemand]: 1676/1683 looper letters, 69 selfloop transitions, 15 changer transitions 0/87 dead transitions. [2023-08-04 02:09:44,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 87 transitions, 401 flow [2023-08-04 02:09:44,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-04 02:09:44,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-04 02:09:44,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 4239 transitions. [2023-08-04 02:09:44,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4197860962566845 [2023-08-04 02:09:44,427 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 4239 transitions. [2023-08-04 02:09:44,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 4239 transitions. [2023-08-04 02:09:44,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:09:44,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 4239 transitions. [2023-08-04 02:09:44,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 706.5) internal successors, (4239), 6 states have internal predecessors, (4239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:09:44,461 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) [2023-08-04 02:09:44,467 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) [2023-08-04 02:09:44,467 INFO L175 Difference]: Start difference. First operand has 77 places, 78 transitions, 197 flow. Second operand 6 states and 4239 transitions. [2023-08-04 02:09:44,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 87 transitions, 401 flow [2023-08-04 02:09:44,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 87 transitions, 395 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:09:44,471 INFO L231 Difference]: Finished difference. Result has 71 places, 87 transitions, 287 flow [2023-08-04 02:09:44,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1683, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=287, PETRI_PLACES=71, PETRI_TRANSITIONS=87} [2023-08-04 02:09:44,474 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, -4 predicate places. [2023-08-04 02:09:44,474 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 87 transitions, 287 flow [2023-08-04 02:09:44,478 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) [2023-08-04 02:09:44,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:09:44,478 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:09:44,491 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 02:09:44,684 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 02:09:44,684 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:09:44,685 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:09:44,685 INFO L85 PathProgramCache]: Analyzing trace with hash -821312494, now seen corresponding path program 2 times [2023-08-04 02:09:44,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:09:44,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406203702] [2023-08-04 02:09:44,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:09:44,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:09:44,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:09:44,873 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-04 02:09:44,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:09:44,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406203702] [2023-08-04 02:09:44,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406203702] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:09:44,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628116225] [2023-08-04 02:09:44,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 02:09:44,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:09:44,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:09:44,876 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 02:09:44,879 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 02:09:45,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 02:09:45,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 02:09:45,038 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-04 02:09:45,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:09:45,129 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-04 02:09:45,129 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:09:45,203 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-04 02:09:45,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628116225] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:09:45,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:09:45,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-08-04 02:09:45,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985780460] [2023-08-04 02:09:45,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:09:45,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-04 02:09:45,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:09:45,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-04 02:09:45,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2023-08-04 02:09:45,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 691 out of 1683 [2023-08-04 02:09:45,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 87 transitions, 287 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) [2023-08-04 02:09:45,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:09:45,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 691 of 1683 [2023-08-04 02:09:45,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:09:48,699 INFO L124 PetriNetUnfolderBase]: 30267/39003 cut-off events. [2023-08-04 02:09:48,700 INFO L125 PetriNetUnfolderBase]: For 202/202 co-relation queries the response was YES. [2023-08-04 02:09:48,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78493 conditions, 39003 events. 30267/39003 cut-off events. For 202/202 co-relation queries the response was YES. Maximal size of possible extension queue 732. Compared 175206 event pairs, 19332 based on Foata normal form. 1/27860 useless extension candidates. Maximal degree in co-relation 78390. Up to 38922 conditions per place. [2023-08-04 02:09:48,927 INFO L140 encePairwiseOnDemand]: 1676/1683 looper letters, 69 selfloop transitions, 18 changer transitions 0/90 dead transitions. [2023-08-04 02:09:48,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 90 transitions, 479 flow [2023-08-04 02:09:48,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-04 02:09:48,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-04 02:09:48,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 4927 transitions. [2023-08-04 02:09:48,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41821577115694764 [2023-08-04 02:09:48,942 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 4927 transitions. [2023-08-04 02:09:48,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 4927 transitions. [2023-08-04 02:09:48,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:09:48,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 4927 transitions. [2023-08-04 02:09:48,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 703.8571428571429) internal successors, (4927), 7 states have internal predecessors, (4927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:09:48,978 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) [2023-08-04 02:09:48,982 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) [2023-08-04 02:09:48,983 INFO L175 Difference]: Start difference. First operand has 71 places, 87 transitions, 287 flow. Second operand 7 states and 4927 transitions. [2023-08-04 02:09:48,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 90 transitions, 479 flow [2023-08-04 02:09:48,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 90 transitions, 455 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-04 02:09:48,989 INFO L231 Difference]: Finished difference. Result has 77 places, 90 transitions, 331 flow [2023-08-04 02:09:48,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=1683, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=331, PETRI_PLACES=77, PETRI_TRANSITIONS=90} [2023-08-04 02:09:48,990 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 2 predicate places. [2023-08-04 02:09:48,990 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 90 transitions, 331 flow [2023-08-04 02:09:48,994 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) [2023-08-04 02:09:48,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:09:48,994 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:09:49,000 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-04 02:09:49,199 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 02:09:49,200 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:09:49,200 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:09:49,200 INFO L85 PathProgramCache]: Analyzing trace with hash 857772109, now seen corresponding path program 3 times [2023-08-04 02:09:49,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:09:49,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517861872] [2023-08-04 02:09:49,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:09:49,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:09:49,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:09:49,265 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 02:09:49,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:09:49,337 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 02:09:49,337 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 02:09:49,338 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 02:09:49,339 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 02:09:49,340 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 02:09:49,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-04 02:09:49,340 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-04 02:09:49,342 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-04 02:09:49,343 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 02:09:49,343 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 02:09:49,471 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 02:09:49,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1101 places, 1245 transitions, 2580 flow [2023-08-04 02:09:53,799 INFO L124 PetriNetUnfolderBase]: 1366/8080 cut-off events. [2023-08-04 02:09:53,799 INFO L125 PetriNetUnfolderBase]: For 602/678 co-relation queries the response was YES. [2023-08-04 02:09:54,101 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. [2023-08-04 02:09:54,101 INFO L82 GeneralOperation]: Start removeDead. Operand has 1101 places, 1245 transitions, 2580 flow [2023-08-04 02:09:54,278 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1101 places, 1245 transitions, 2580 flow [2023-08-04 02:09:54,278 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:09:54,278 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1101 places, 1245 transitions, 2580 flow [2023-08-04 02:09:54,279 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1101 places, 1245 transitions, 2580 flow [2023-08-04 02:09:54,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1101 places, 1245 transitions, 2580 flow [2023-08-04 02:09:58,285 INFO L124 PetriNetUnfolderBase]: 1366/8080 cut-off events. [2023-08-04 02:09:58,285 INFO L125 PetriNetUnfolderBase]: For 602/678 co-relation queries the response was YES. [2023-08-04 02:09:58,596 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. [2023-08-04 02:09:59,515 INFO L119 LiptonReduction]: Number of co-enabled transitions 893880 [2023-08-04 02:10:27,404 INFO L134 LiptonReduction]: Checked pairs total: 1674354 [2023-08-04 02:10:27,404 INFO L136 LiptonReduction]: Total number of compositions: 1347 [2023-08-04 02:10:27,407 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:10:27,408 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;@12254f0c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:10:27,408 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 02:10:27,421 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:10:27,422 INFO L124 PetriNetUnfolderBase]: 26/183 cut-off events. [2023-08-04 02:10:27,422 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-08-04 02:10:27,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:10:27,422 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:10:27,422 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:10:27,422 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:10:27,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1330319433, now seen corresponding path program 1 times [2023-08-04 02:10:27,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:10:27,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352501873] [2023-08-04 02:10:27,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:10:27,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:10:27,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:10:27,471 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:10:27,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:10:27,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352501873] [2023-08-04 02:10:27,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352501873] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:10:27,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:10:27,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 02:10:27,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093974518] [2023-08-04 02:10:27,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:10:27,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:10:27,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:10:27,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:10:27,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:10:27,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1138 out of 2592 [2023-08-04 02:10:27,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 290 transitions, 670 flow. Second operand has 3 states, 3 states have (on average 1140.6666666666667) internal successors, (3422), 3 states have internal predecessors, (3422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:10:27,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:10:27,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1138 of 2592 [2023-08-04 02:10:27,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand