/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_popl20-bad-dot-product.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 02:47:16,436 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 02:47:16,490 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 02:47:16,493 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 02:47:16,493 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 02:47:16,494 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 02:47:16,494 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 02:47:16,511 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 02:47:16,511 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 02:47:16,511 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 02:47:16,512 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 02:47:16,512 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 02:47:16,512 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 02:47:16,513 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 02:47:16,513 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 02:47:16,513 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 02:47:16,513 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 02:47:16,514 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 02:47:16,514 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 02:47:16,514 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 02:47:16,514 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 02:47:16,515 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 02:47:16,515 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 02:47:16,515 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 02:47:16,516 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 02:47:16,516 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 02:47:16,516 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 02:47:16,516 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 02:47:16,516 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 02:47:16,517 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 02:47:16,517 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:47:16,517 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 02:47:16,517 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 02:47:16,518 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 02:47:16,518 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 02:47:16,518 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 02:47:16,518 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 02:47:16,519 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 02:47:16,519 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 02:47:16,519 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 02:47:16,519 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 02:47:16,525 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 02:47:16,735 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 02:47:16,753 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 02:47:16,755 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 02:47:16,756 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 02:47:16,757 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 02:47:16,758 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-bad-dot-product.wvr_bound2.c [2023-08-04 02:47:17,871 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 02:47:18,009 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 02:47:18,009 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-bad-dot-product.wvr_bound2.c [2023-08-04 02:47:18,017 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80761fe0b/972dc54ca8be4480a98d13de449dec20/FLAGa16c70670 [2023-08-04 02:47:18,031 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80761fe0b/972dc54ca8be4480a98d13de449dec20 [2023-08-04 02:47:18,035 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 02:47:18,037 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 02:47:18,039 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 02:47:18,039 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 02:47:18,041 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 02:47:18,042 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:47:18" (1/1) ... [2023-08-04 02:47:18,042 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a3b9630 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:47:18, skipping insertion in model container [2023-08-04 02:47:18,043 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:47:18" (1/1) ... [2023-08-04 02:47:18,066 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 02:47:18,195 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_popl20-bad-dot-product.wvr_bound2.c[3108,3121] [2023-08-04 02:47:18,200 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:47:18,207 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 02:47:18,229 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_popl20-bad-dot-product.wvr_bound2.c[3108,3121] [2023-08-04 02:47:18,233 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:47:18,239 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 02:47:18,239 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 02:47:18,245 INFO L206 MainTranslator]: Completed translation [2023-08-04 02:47:18,245 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:47:18 WrapperNode [2023-08-04 02:47:18,245 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 02:47:18,246 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 02:47:18,246 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 02:47:18,247 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 02:47:18,253 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:47:18" (1/1) ... [2023-08-04 02:47:18,272 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:47:18" (1/1) ... [2023-08-04 02:47:18,293 INFO L138 Inliner]: procedures = 26, calls = 55, calls flagged for inlining = 16, calls inlined = 22, statements flattened = 328 [2023-08-04 02:47:18,294 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 02:47:18,295 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 02:47:18,295 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 02:47:18,295 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 02:47:18,302 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:47:18" (1/1) ... [2023-08-04 02:47:18,302 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:47:18" (1/1) ... [2023-08-04 02:47:18,305 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:47:18" (1/1) ... [2023-08-04 02:47:18,305 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:47:18" (1/1) ... [2023-08-04 02:47:18,311 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:47:18" (1/1) ... [2023-08-04 02:47:18,314 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:47:18" (1/1) ... [2023-08-04 02:47:18,316 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:47:18" (1/1) ... [2023-08-04 02:47:18,317 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:47:18" (1/1) ... [2023-08-04 02:47:18,324 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 02:47:18,325 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 02:47:18,325 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 02:47:18,325 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 02:47:18,326 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:47:18" (1/1) ... [2023-08-04 02:47:18,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:47:18,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:47:18,348 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 02:47:18,352 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 02:47:18,371 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 02:47:18,371 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 02:47:18,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 02:47:18,371 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 02:47:18,371 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 02:47:18,371 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 02:47:18,371 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 02:47:18,371 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 02:47:18,371 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 02:47:18,372 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 02:47:18,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 02:47:18,372 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 02:47:18,372 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 02:47:18,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 02:47:18,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 02:47:18,372 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 02:47:18,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 02:47:18,373 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 02:47:18,465 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 02:47:18,466 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 02:47:18,856 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 02:47:18,944 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 02:47:18,944 INFO L302 CfgBuilder]: Removed 14 assume(true) statements. [2023-08-04 02:47:18,947 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:47:18 BoogieIcfgContainer [2023-08-04 02:47:18,947 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 02:47:18,949 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 02:47:18,949 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 02:47:18,951 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 02:47:18,952 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 02:47:18" (1/3) ... [2023-08-04 02:47:18,953 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@211c5abf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:47:18, skipping insertion in model container [2023-08-04 02:47:18,954 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:47:18" (2/3) ... [2023-08-04 02:47:18,955 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@211c5abf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:47:18, skipping insertion in model container [2023-08-04 02:47:18,955 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:47:18" (3/3) ... [2023-08-04 02:47:18,956 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-bad-dot-product.wvr_bound2.c [2023-08-04 02:47:18,961 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 02:47:18,966 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 02:47:18,967 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 02:47:18,967 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 02:47:19,038 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 02:47:19,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 254 places, 287 transitions, 616 flow [2023-08-04 02:47:19,263 INFO L124 PetriNetUnfolderBase]: 126/827 cut-off events. [2023-08-04 02:47:19,264 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 02:47:19,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 888 conditions, 827 events. 126/827 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 4302 event pairs, 0 based on Foata normal form. 0/691 useless extension candidates. Maximal degree in co-relation 466. Up to 16 conditions per place. [2023-08-04 02:47:19,276 INFO L82 GeneralOperation]: Start removeDead. Operand has 254 places, 287 transitions, 616 flow [2023-08-04 02:47:19,287 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 254 places, 287 transitions, 616 flow [2023-08-04 02:47:19,290 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:47:19,301 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 254 places, 287 transitions, 616 flow [2023-08-04 02:47:19,304 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 254 places, 287 transitions, 616 flow [2023-08-04 02:47:19,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 254 places, 287 transitions, 616 flow [2023-08-04 02:47:19,387 INFO L124 PetriNetUnfolderBase]: 126/827 cut-off events. [2023-08-04 02:47:19,387 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 02:47:19,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 888 conditions, 827 events. 126/827 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 4302 event pairs, 0 based on Foata normal form. 0/691 useless extension candidates. Maximal degree in co-relation 466. Up to 16 conditions per place. [2023-08-04 02:47:19,411 INFO L119 LiptonReduction]: Number of co-enabled transitions 17640 [2023-08-04 02:47:25,712 INFO L134 LiptonReduction]: Checked pairs total: 25777 [2023-08-04 02:47:25,713 INFO L136 LiptonReduction]: Total number of compositions: 281 [2023-08-04 02:47:25,728 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:47:25,736 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;@4aa92529, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:47:25,736 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 02:47:25,745 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:47:25,746 INFO L124 PetriNetUnfolderBase]: 5/38 cut-off events. [2023-08-04 02:47:25,746 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 02:47:25,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:47:25,746 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-04 02:47:25,747 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 02:47:25,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:47:25,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1329999013, now seen corresponding path program 1 times [2023-08-04 02:47:25,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:47:25,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322920474] [2023-08-04 02:47:25,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:47:25,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:47:25,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:47:26,069 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 02:47:26,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:47:26,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322920474] [2023-08-04 02:47:26,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322920474] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:47:26,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:47:26,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 02:47:26,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143487974] [2023-08-04 02:47:26,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:47:26,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 02:47:26,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:47:26,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 02:47:26,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 02:47:26,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 568 [2023-08-04 02:47:26,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 60 transitions, 162 flow. Second operand has 4 states, 4 states have (on average 239.5) internal successors, (958), 4 states have internal predecessors, (958), 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 02:47:26,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:47:26,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 568 [2023-08-04 02:47:26,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:47:26,977 INFO L124 PetriNetUnfolderBase]: 8512/11393 cut-off events. [2023-08-04 02:47:26,977 INFO L125 PetriNetUnfolderBase]: For 574/574 co-relation queries the response was YES. [2023-08-04 02:47:26,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22907 conditions, 11393 events. 8512/11393 cut-off events. For 574/574 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 56915 event pairs, 4591 based on Foata normal form. 0/6899 useless extension candidates. Maximal degree in co-relation 19207. Up to 11009 conditions per place. [2023-08-04 02:47:27,005 INFO L140 encePairwiseOnDemand]: 562/568 looper letters, 30 selfloop transitions, 2 changer transitions 25/63 dead transitions. [2023-08-04 02:47:27,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 63 transitions, 276 flow [2023-08-04 02:47:27,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:47:27,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:47:27,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1247 transitions. [2023-08-04 02:47:27,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43908450704225355 [2023-08-04 02:47:27,020 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1247 transitions. [2023-08-04 02:47:27,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1247 transitions. [2023-08-04 02:47:27,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:47:27,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1247 transitions. [2023-08-04 02:47:27,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 249.4) internal successors, (1247), 5 states have internal predecessors, (1247), 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 02:47:27,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 568.0) internal successors, (3408), 6 states have internal predecessors, (3408), 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 02:47:27,037 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 568.0) internal successors, (3408), 6 states have internal predecessors, (3408), 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 02:47:27,038 INFO L175 Difference]: Start difference. First operand has 50 places, 60 transitions, 162 flow. Second operand 5 states and 1247 transitions. [2023-08-04 02:47:27,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 63 transitions, 276 flow [2023-08-04 02:47:27,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 63 transitions, 276 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 02:47:27,046 INFO L231 Difference]: Finished difference. Result has 56 places, 38 transitions, 107 flow [2023-08-04 02:47:27,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=568, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=107, PETRI_PLACES=56, PETRI_TRANSITIONS=38} [2023-08-04 02:47:27,051 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 6 predicate places. [2023-08-04 02:47:27,051 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 38 transitions, 107 flow [2023-08-04 02:47:27,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 239.5) internal successors, (958), 4 states have internal predecessors, (958), 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 02:47:27,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:47:27,052 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:47:27,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 02:47:27,052 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 02:47:27,058 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:47:27,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1751695215, now seen corresponding path program 1 times [2023-08-04 02:47:27,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:47:27,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532190842] [2023-08-04 02:47:27,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:47:27,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:47:27,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:47:27,128 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 02:47:27,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:47:27,161 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 02:47:27,161 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 02:47:27,162 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 02:47:27,163 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 02:47:27,163 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 02:47:27,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 02:47:27,164 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 02:47:27,165 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-04 02:47:27,165 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 02:47:27,165 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 02:47:27,196 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 02:47:27,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 332 places, 383 transitions, 856 flow [2023-08-04 02:47:27,789 INFO L124 PetriNetUnfolderBase]: 973/4658 cut-off events. [2023-08-04 02:47:27,789 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 02:47:27,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5332 conditions, 4658 events. 973/4658 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 38348 event pairs, 11 based on Foata normal form. 0/3929 useless extension candidates. Maximal degree in co-relation 2813. Up to 192 conditions per place. [2023-08-04 02:47:27,850 INFO L82 GeneralOperation]: Start removeDead. Operand has 332 places, 383 transitions, 856 flow [2023-08-04 02:47:27,880 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 332 places, 383 transitions, 856 flow [2023-08-04 02:47:27,881 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:47:27,881 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 332 places, 383 transitions, 856 flow [2023-08-04 02:47:27,881 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 332 places, 383 transitions, 856 flow [2023-08-04 02:47:27,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 332 places, 383 transitions, 856 flow [2023-08-04 02:47:28,404 INFO L124 PetriNetUnfolderBase]: 973/4658 cut-off events. [2023-08-04 02:47:28,405 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 02:47:28,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5332 conditions, 4658 events. 973/4658 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 38348 event pairs, 11 based on Foata normal form. 0/3929 useless extension candidates. Maximal degree in co-relation 2813. Up to 192 conditions per place. [2023-08-04 02:47:28,620 INFO L119 LiptonReduction]: Number of co-enabled transitions 52920 [2023-08-04 02:47:35,726 INFO L134 LiptonReduction]: Checked pairs total: 85794 [2023-08-04 02:47:35,726 INFO L136 LiptonReduction]: Total number of compositions: 367 [2023-08-04 02:47:35,728 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:47:35,728 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;@4aa92529, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:47:35,728 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 02:47:35,738 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:47:35,740 INFO L124 PetriNetUnfolderBase]: 23/140 cut-off events. [2023-08-04 02:47:35,740 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-08-04 02:47:35,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:47:35,743 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 02:47:35,743 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 02:47:35,743 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:47:35,743 INFO L85 PathProgramCache]: Analyzing trace with hash 2300495, now seen corresponding path program 1 times [2023-08-04 02:47:35,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:47:35,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852428334] [2023-08-04 02:47:35,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:47:35,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:47:35,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:47:35,828 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 02:47:35,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:47:35,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852428334] [2023-08-04 02:47:35,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852428334] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:47:35,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804313384] [2023-08-04 02:47:35,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:47:35,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:47:35,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:47:35,831 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 02:47:35,833 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 02:47:35,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:47:35,922 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 02:47:35,924 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:47:35,978 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 02:47:35,978 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:47:35,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804313384] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:47:35,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:47:35,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 02:47:35,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75560999] [2023-08-04 02:47:35,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:47:35,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:47:35,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:47:35,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:47:35,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 02:47:35,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 315 out of 750 [2023-08-04 02:47:35,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 93 transitions, 276 flow. Second operand has 5 states, 5 states have (on average 317.0) internal successors, (1585), 5 states have internal predecessors, (1585), 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 02:47:35,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:47:35,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 315 of 750 [2023-08-04 02:47:35,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand