/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-subst.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 19:42:07,582 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 19:42:07,620 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 19:42:07,629 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 19:42:07,629 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 19:42:07,630 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 19:42:07,630 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 19:42:07,643 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 19:42:07,644 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 19:42:07,644 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 19:42:07,644 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 19:42:07,645 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 19:42:07,645 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 19:42:07,645 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 19:42:07,645 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 19:42:07,646 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 19:42:07,646 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 19:42:07,646 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 19:42:07,646 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 19:42:07,646 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 19:42:07,647 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 19:42:07,647 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 19:42:07,647 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 19:42:07,648 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 19:42:07,648 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 19:42:07,648 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 19:42:07,648 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 19:42:07,649 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 19:42:07,649 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 19:42:07,649 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 19:42:07,649 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 19:42:07,649 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 19:42:07,650 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 19:42:07,650 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 19:42:07,650 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 19:42:07,650 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 19:42:07,650 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 19:42:07,651 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 19:42:07,651 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 19:42:07,651 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 19:42:07,651 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 19:42:07,651 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 19:42:07,832 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 19:42:07,854 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 19:42:07,856 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 19:42:07,857 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 19:42:07,858 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 19:42:07,859 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-nzb-file-subst.wvr_bound2.c [2023-08-03 19:42:08,916 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 19:42:09,084 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 19:42:09,085 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-nzb-file-subst.wvr_bound2.c [2023-08-03 19:42:09,095 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/889416099/033af6d65fd44dafa7dbc9d210327259/FLAG3e3847aae [2023-08-03 19:42:09,107 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/889416099/033af6d65fd44dafa7dbc9d210327259 [2023-08-03 19:42:09,111 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 19:42:09,113 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 19:42:09,113 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 19:42:09,113 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 19:42:09,115 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 19:42:09,116 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 07:42:09" (1/1) ... [2023-08-03 19:42:09,117 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63e0c7d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:42:09, skipping insertion in model container [2023-08-03 19:42:09,117 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 07:42:09" (1/1) ... [2023-08-03 19:42:09,146 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 19:42:09,349 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] [2023-08-03 19:42:09,353 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 19:42:09,369 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 19:42:09,414 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] [2023-08-03 19:42:09,416 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 19:42:09,427 INFO L206 MainTranslator]: Completed translation [2023-08-03 19:42:09,427 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:42:09 WrapperNode [2023-08-03 19:42:09,427 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 19:42:09,428 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 19:42:09,428 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 19:42:09,428 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 19:42:09,433 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:42:09" (1/1) ... [2023-08-03 19:42:09,450 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:42:09" (1/1) ... [2023-08-03 19:42:09,491 INFO L138 Inliner]: procedures = 26, calls = 76, calls flagged for inlining = 28, calls inlined = 42, statements flattened = 649 [2023-08-03 19:42:09,492 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 19:42:09,492 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 19:42:09,492 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 19:42:09,494 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 19:42:09,500 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:42:09" (1/1) ... [2023-08-03 19:42:09,501 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:42:09" (1/1) ... [2023-08-03 19:42:09,515 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:42:09" (1/1) ... [2023-08-03 19:42:09,516 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:42:09" (1/1) ... [2023-08-03 19:42:09,537 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:42:09" (1/1) ... [2023-08-03 19:42:09,542 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:42:09" (1/1) ... [2023-08-03 19:42:09,544 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:42:09" (1/1) ... [2023-08-03 19:42:09,546 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:42:09" (1/1) ... [2023-08-03 19:42:09,565 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 19:42:09,566 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 19:42:09,566 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 19:42:09,566 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 19:42:09,567 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:42:09" (1/1) ... [2023-08-03 19:42:09,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 19:42:09,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:42:09,634 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 19:42:09,678 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 19:42:09,688 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 19:42:09,688 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 19:42:09,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 19:42:09,688 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 19:42:09,688 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-03 19:42:09,688 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-03 19:42:09,688 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-03 19:42:09,688 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-03 19:42:09,688 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-03 19:42:09,689 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-03 19:42:09,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 19:42:09,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-03 19:42:09,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 19:42:09,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 19:42:09,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 19:42:09,692 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 19:42:09,785 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 19:42:09,786 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 19:42:10,452 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 19:42:10,468 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 19:42:10,468 INFO L302 CfgBuilder]: Removed 12 assume(true) statements. [2023-08-03 19:42:10,471 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 07:42:10 BoogieIcfgContainer [2023-08-03 19:42:10,471 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 19:42:10,475 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 19:42:10,475 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 19:42:10,477 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 19:42:10,477 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 07:42:09" (1/3) ... [2023-08-03 19:42:10,478 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d5f20a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 07:42:10, skipping insertion in model container [2023-08-03 19:42:10,478 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:42:09" (2/3) ... [2023-08-03 19:42:10,479 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d5f20a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 07:42:10, skipping insertion in model container [2023-08-03 19:42:10,479 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 07:42:10" (3/3) ... [2023-08-03 19:42:10,480 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_chl-nzb-file-subst.wvr_bound2.c [2023-08-03 19:42:10,487 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 19:42:10,494 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 19:42:10,494 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 19:42:10,494 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 19:42:10,659 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-03 19:42:10,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 684 places, 765 transitions, 1572 flow [2023-08-03 19:42:11,244 INFO L124 PetriNetUnfolderBase]: 234/1817 cut-off events. [2023-08-03 19:42:11,244 INFO L125 PetriNetUnfolderBase]: For 36/56 co-relation queries the response was YES. [2023-08-03 19:42:11,276 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. [2023-08-03 19:42:11,277 INFO L82 GeneralOperation]: Start removeDead. Operand has 684 places, 765 transitions, 1572 flow [2023-08-03 19:42:11,298 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 684 places, 765 transitions, 1572 flow [2023-08-03 19:42:11,301 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 19:42:11,309 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 684 places, 765 transitions, 1572 flow [2023-08-03 19:42:11,310 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 684 places, 765 transitions, 1572 flow [2023-08-03 19:42:11,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 684 places, 765 transitions, 1572 flow [2023-08-03 19:42:11,626 INFO L124 PetriNetUnfolderBase]: 234/1817 cut-off events. [2023-08-03 19:42:11,627 INFO L125 PetriNetUnfolderBase]: For 36/56 co-relation queries the response was YES. [2023-08-03 19:42:11,661 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 19:42:11,755 INFO L119 LiptonReduction]: Number of co-enabled transitions 218088 [2023-08-03 19:42:27,794 INFO L134 LiptonReduction]: Checked pairs total: 267542 [2023-08-03 19:42:27,795 INFO L136 LiptonReduction]: Total number of compositions: 918 [2023-08-03 19:42:27,817 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 19:42:27,822 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;@4c2f95f3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 19:42:27,822 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-03 19:42:27,829 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 19:42:27,829 INFO L124 PetriNetUnfolderBase]: 6/40 cut-off events. [2023-08-03 19:42:27,829 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 19:42:27,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:42:27,830 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:42:27,830 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 19:42:27,834 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:42:27,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1769510446, now seen corresponding path program 1 times [2023-08-03 19:42:27,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:42:27,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708647713] [2023-08-03 19:42:27,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:42:27,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:42:27,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:42:28,170 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 19:42:28,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:42:28,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708647713] [2023-08-03 19:42:28,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708647713] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:42:28,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 19:42:28,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 19:42:28,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687266185] [2023-08-03 19:42:28,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:42:28,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 19:42:28,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:42:28,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 19:42:28,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 19:42:28,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 697 out of 1683 [2023-08-03 19:42:28,253 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 19:42:28,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:42:28,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 697 of 1683 [2023-08-03 19:42:28,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:42:37,297 INFO L124 PetriNetUnfolderBase]: 110493/141285 cut-off events. [2023-08-03 19:42:37,297 INFO L125 PetriNetUnfolderBase]: For 5106/5106 co-relation queries the response was YES. [2023-08-03 19:42:37,472 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 19:42:37,902 INFO L140 encePairwiseOnDemand]: 1675/1683 looper letters, 88 selfloop transitions, 6 changer transitions 0/100 dead transitions. [2023-08-03 19:42:37,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 100 transitions, 430 flow [2023-08-03 19:42:37,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 19:42:37,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 19:42:37,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2189 transitions. [2023-08-03 19:42:37,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4335511982570806 [2023-08-03 19:42:37,920 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2189 transitions. [2023-08-03 19:42:37,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2189 transitions. [2023-08-03 19:42:37,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:42:37,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2189 transitions. [2023-08-03 19:42:37,931 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 19:42:37,941 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 19:42:37,943 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 19:42:37,945 INFO L175 Difference]: Start difference. First operand has 75 places, 98 transitions, 238 flow. Second operand 3 states and 2189 transitions. [2023-08-03 19:42:37,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 100 transitions, 430 flow [2023-08-03 19:42:37,953 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 19:42:37,956 INFO L231 Difference]: Finished difference. Result has 77 places, 100 transitions, 268 flow [2023-08-03 19:42:37,957 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 19:42:37,959 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 2 predicate places. [2023-08-03 19:42:37,959 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 100 transitions, 268 flow [2023-08-03 19:42:37,960 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 19:42:37,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:42:37,961 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:42:37,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 19:42:37,961 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 19:42:37,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:42:37,962 INFO L85 PathProgramCache]: Analyzing trace with hash 792332941, now seen corresponding path program 1 times [2023-08-03 19:42:37,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:42:37,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398007467] [2023-08-03 19:42:37,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:42:37,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:42:38,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:42:38,115 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 19:42:38,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:42:38,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398007467] [2023-08-03 19:42:38,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398007467] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:42:38,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599472203] [2023-08-03 19:42:38,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:42:38,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:42:38,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:42:38,119 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 19:42:38,124 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 19:42:38,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:42:38,229 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-03 19:42:38,233 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:42:38,278 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 19:42:38,278 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 19:42:38,295 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 19:42:38,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599472203] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 19:42:38,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 19:42:38,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-08-03 19:42:38,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593416528] [2023-08-03 19:42:38,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 19:42:38,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-03 19:42:38,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:42:38,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-03 19:42:38,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2023-08-03 19:42:38,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 691 out of 1683 [2023-08-03 19:42:38,373 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 19:42:38,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:42:38,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 691 of 1683 [2023-08-03 19:42:38,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:42:47,418 INFO L124 PetriNetUnfolderBase]: 110493/141294 cut-off events. [2023-08-03 19:42:47,418 INFO L125 PetriNetUnfolderBase]: For 5082/5082 co-relation queries the response was YES. [2023-08-03 19:42:47,679 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 19:42:48,119 INFO L140 encePairwiseOnDemand]: 1676/1683 looper letters, 88 selfloop transitions, 15 changer transitions 0/109 dead transitions. [2023-08-03 19:42:48,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 109 transitions, 510 flow [2023-08-03 19:42:48,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-03 19:42:48,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-03 19:42:48,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 4258 transitions. [2023-08-03 19:42:48,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4216676569617746 [2023-08-03 19:42:48,128 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 4258 transitions. [2023-08-03 19:42:48,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 4258 transitions. [2023-08-03 19:42:48,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:42:48,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 4258 transitions. [2023-08-03 19:42:48,137 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 19:42:48,148 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 19:42:48,152 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 19:42:48,152 INFO L175 Difference]: Start difference. First operand has 77 places, 100 transitions, 268 flow. Second operand 6 states and 4258 transitions. [2023-08-03 19:42:48,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 109 transitions, 510 flow [2023-08-03 19:42:48,158 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 19:42:48,160 INFO L231 Difference]: Finished difference. Result has 84 places, 109 transitions, 358 flow [2023-08-03 19:42:48,160 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 19:42:48,160 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 9 predicate places. [2023-08-03 19:42:48,160 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 109 transitions, 358 flow [2023-08-03 19:42:48,163 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 19:42:48,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:42:48,163 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:42:48,170 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-03 19:42:48,368 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 19:42:48,368 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 19:42:48,369 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:42:48,369 INFO L85 PathProgramCache]: Analyzing trace with hash -821312494, now seen corresponding path program 2 times [2023-08-03 19:42:48,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:42:48,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220071899] [2023-08-03 19:42:48,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:42:48,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:42:48,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:42:48,560 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 19:42:48,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:42:48,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220071899] [2023-08-03 19:42:48,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220071899] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:42:48,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414135548] [2023-08-03 19:42:48,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 19:42:48,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:42:48,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:42:48,565 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 19:42:48,567 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 19:42:48,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-03 19:42:48,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 19:42:48,693 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-03 19:42:48,694 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:42:48,756 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 19:42:48,756 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 19:42:48,810 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 19:42:48,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414135548] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 19:42:48,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 19:42:48,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-08-03 19:42:48,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892485650] [2023-08-03 19:42:48,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 19:42:48,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-03 19:42:48,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:42:48,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-03 19:42:48,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2023-08-03 19:42:49,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 691 out of 1683 [2023-08-03 19:42:49,030 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 19:42:49,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:42:49,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 691 of 1683 [2023-08-03 19:42:49,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:42:58,370 INFO L124 PetriNetUnfolderBase]: 110493/141297 cut-off events. [2023-08-03 19:42:58,372 INFO L125 PetriNetUnfolderBase]: For 5086/5086 co-relation queries the response was YES. [2023-08-03 19:42:58,694 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 19:42:59,145 INFO L140 encePairwiseOnDemand]: 1676/1683 looper letters, 88 selfloop transitions, 18 changer transitions 0/112 dead transitions. [2023-08-03 19:42:59,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 112 transitions, 588 flow [2023-08-03 19:42:59,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-03 19:42:59,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-03 19:42:59,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 4946 transitions. [2023-08-03 19:42:59,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4198285374755963 [2023-08-03 19:42:59,187 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 4946 transitions. [2023-08-03 19:42:59,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 4946 transitions. [2023-08-03 19:42:59,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:42:59,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 4946 transitions. [2023-08-03 19:42:59,195 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 19:42:59,228 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 19:42:59,230 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 19:42:59,230 INFO L175 Difference]: Start difference. First operand has 84 places, 109 transitions, 358 flow. Second operand 7 states and 4946 transitions. [2023-08-03 19:42:59,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 112 transitions, 588 flow [2023-08-03 19:42:59,253 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 19:42:59,255 INFO L231 Difference]: Finished difference. Result has 90 places, 112 transitions, 402 flow [2023-08-03 19:42:59,255 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 19:42:59,256 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, 15 predicate places. [2023-08-03 19:42:59,256 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 112 transitions, 402 flow [2023-08-03 19:42:59,259 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 19:42:59,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:42:59,259 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:42:59,263 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 19:42:59,463 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 19:42:59,463 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 19:42:59,463 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:42:59,464 INFO L85 PathProgramCache]: Analyzing trace with hash 857772109, now seen corresponding path program 3 times [2023-08-03 19:42:59,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:42:59,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83035013] [2023-08-03 19:42:59,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:42:59,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:42:59,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 19:42:59,527 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 19:42:59,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 19:42:59,605 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 19:42:59,606 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 19:42:59,607 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-03 19:42:59,612 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-03 19:42:59,612 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-03 19:42:59,612 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-03 19:42:59,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-03 19:42:59,613 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-03 19:42:59,614 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 19:42:59,614 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 19:42:59,686 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-03 19:42:59,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1101 places, 1245 transitions, 2580 flow [2023-08-03 19:43:02,866 INFO L124 PetriNetUnfolderBase]: 1366/8080 cut-off events. [2023-08-03 19:43:02,866 INFO L125 PetriNetUnfolderBase]: For 602/678 co-relation queries the response was YES. [2023-08-03 19:43:03,180 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 19:43:03,180 INFO L82 GeneralOperation]: Start removeDead. Operand has 1101 places, 1245 transitions, 2580 flow [2023-08-03 19:43:03,285 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1101 places, 1245 transitions, 2580 flow [2023-08-03 19:43:03,285 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 19:43:03,285 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1101 places, 1245 transitions, 2580 flow [2023-08-03 19:43:03,286 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1101 places, 1245 transitions, 2580 flow [2023-08-03 19:43:03,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1101 places, 1245 transitions, 2580 flow [2023-08-03 19:43:06,017 INFO L124 PetriNetUnfolderBase]: 1366/8080 cut-off events. [2023-08-03 19:43:06,017 INFO L125 PetriNetUnfolderBase]: For 602/678 co-relation queries the response was YES. [2023-08-03 19:43:06,277 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 19:43:07,142 INFO L119 LiptonReduction]: Number of co-enabled transitions 893880 [2023-08-03 19:43:29,284 INFO L134 LiptonReduction]: Checked pairs total: 1674354 [2023-08-03 19:43:29,285 INFO L136 LiptonReduction]: Total number of compositions: 1347 [2023-08-03 19:43:29,287 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 19:43:29,287 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;@4c2f95f3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 19:43:29,287 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-03 19:43:29,290 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 19:43:29,290 INFO L124 PetriNetUnfolderBase]: 4/40 cut-off events. [2023-08-03 19:43:29,291 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-03 19:43:29,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:43:29,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:43:29,291 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 19:43:29,291 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:43:29,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1946730677, now seen corresponding path program 1 times [2023-08-03 19:43:29,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:43:29,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670458867] [2023-08-03 19:43:29,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:43:29,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:43:29,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:43:29,338 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 19:43:29,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:43:29,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670458867] [2023-08-03 19:43:29,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670458867] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:43:29,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 19:43:29,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 19:43:29,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433586300] [2023-08-03 19:43:29,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:43:29,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 19:43:29,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:43:29,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 19:43:29,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 19:43:29,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1138 out of 2592 [2023-08-03 19:43:29,381 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 19:43:29,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:43:29,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1138 of 2592 [2023-08-03 19:43:29,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand