/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-more-array-sum-alt2.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 03:01:30,494 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 03:01:30,562 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 03:01:30,567 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 03:01:30,567 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 03:01:30,568 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 03:01:30,568 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 03:01:30,597 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 03:01:30,598 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 03:01:30,602 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 03:01:30,603 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 03:01:30,603 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 03:01:30,603 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 03:01:30,604 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 03:01:30,605 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 03:01:30,605 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 03:01:30,605 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 03:01:30,606 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 03:01:30,606 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 03:01:30,606 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 03:01:30,606 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 03:01:30,607 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 03:01:30,607 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 03:01:30,608 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 03:01:30,608 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 03:01:30,609 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 03:01:30,609 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 03:01:30,609 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 03:01:30,610 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 03:01:30,610 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 03:01:30,611 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 03:01:30,611 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 03:01:30,611 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 03:01:30,611 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 03:01:30,612 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 03:01:30,612 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 03:01:30,612 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 03:01:30,612 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 03:01:30,612 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 03:01:30,613 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 03:01:30,613 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 03:01:30,613 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 03:01:30,836 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 03:01:30,869 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 03:01:30,871 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 03:01:30,872 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 03:01:30,874 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 03:01:30,875 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-array-sum-alt2.wvr_bound2.c [2023-08-04 03:01:31,979 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 03:01:32,124 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 03:01:32,124 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-array-sum-alt2.wvr_bound2.c [2023-08-04 03:01:32,129 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4e409322/d502e154610640a291ed6e72d92bdef9/FLAGc7bbfd703 [2023-08-04 03:01:32,139 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4e409322/d502e154610640a291ed6e72d92bdef9 [2023-08-04 03:01:32,141 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 03:01:32,142 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 03:01:32,143 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 03:01:32,143 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 03:01:32,145 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 03:01:32,145 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 03:01:32" (1/1) ... [2023-08-04 03:01:32,146 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66756b26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:01:32, skipping insertion in model container [2023-08-04 03:01:32,146 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 03:01:32" (1/1) ... [2023-08-04 03:01:32,161 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 03:01:32,306 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-more-array-sum-alt2.wvr_bound2.c[2768,2781] [2023-08-04 03:01:32,311 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 03:01:32,317 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 03:01:32,336 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-more-array-sum-alt2.wvr_bound2.c[2768,2781] [2023-08-04 03:01:32,339 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 03:01:32,344 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 03:01:32,344 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 03:01:32,355 INFO L206 MainTranslator]: Completed translation [2023-08-04 03:01:32,358 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:01:32 WrapperNode [2023-08-04 03:01:32,358 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 03:01:32,359 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 03:01:32,359 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 03:01:32,359 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 03:01:32,364 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:01:32" (1/1) ... [2023-08-04 03:01:32,371 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:01:32" (1/1) ... [2023-08-04 03:01:32,391 INFO L138 Inliner]: procedures = 25, calls = 45, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 242 [2023-08-04 03:01:32,391 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 03:01:32,392 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 03:01:32,392 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 03:01:32,392 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 03:01:32,398 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:01:32" (1/1) ... [2023-08-04 03:01:32,399 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:01:32" (1/1) ... [2023-08-04 03:01:32,401 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:01:32" (1/1) ... [2023-08-04 03:01:32,401 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:01:32" (1/1) ... [2023-08-04 03:01:32,407 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:01:32" (1/1) ... [2023-08-04 03:01:32,410 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:01:32" (1/1) ... [2023-08-04 03:01:32,412 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:01:32" (1/1) ... [2023-08-04 03:01:32,413 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:01:32" (1/1) ... [2023-08-04 03:01:32,415 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 03:01:32,415 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 03:01:32,416 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 03:01:32,416 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 03:01:32,416 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:01:32" (1/1) ... [2023-08-04 03:01:32,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 03:01:32,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:01:32,461 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 03:01:32,473 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 03:01:32,500 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 03:01:32,500 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 03:01:32,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 03:01:32,501 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 03:01:32,501 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 03:01:32,502 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 03:01:32,502 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 03:01:32,502 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 03:01:32,502 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 03:01:32,503 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 03:01:32,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 03:01:32,504 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 03:01:32,504 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 03:01:32,504 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 03:01:32,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 03:01:32,504 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 03:01:32,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 03:01:32,506 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 03:01:32,609 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 03:01:32,610 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 03:01:32,851 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 03:01:32,948 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 03:01:32,949 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-04 03:01:32,950 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 03:01:32 BoogieIcfgContainer [2023-08-04 03:01:32,951 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 03:01:32,952 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 03:01:32,952 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 03:01:32,955 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 03:01:32,955 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 03:01:32" (1/3) ... [2023-08-04 03:01:32,955 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f17e403 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 03:01:32, skipping insertion in model container [2023-08-04 03:01:32,955 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:01:32" (2/3) ... [2023-08-04 03:01:32,956 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f17e403 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 03:01:32, skipping insertion in model container [2023-08-04 03:01:32,956 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 03:01:32" (3/3) ... [2023-08-04 03:01:32,967 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-more-array-sum-alt2.wvr_bound2.c [2023-08-04 03:01:32,973 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 03:01:32,979 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 03:01:32,980 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 03:01:32,980 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 03:01:33,036 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 03:01:33,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 172 places, 192 transitions, 426 flow [2023-08-04 03:01:33,166 INFO L124 PetriNetUnfolderBase]: 101/660 cut-off events. [2023-08-04 03:01:33,166 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 03:01:33,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 721 conditions, 660 events. 101/660 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3225 event pairs, 0 based on Foata normal form. 0/549 useless extension candidates. Maximal degree in co-relation 373. Up to 16 conditions per place. [2023-08-04 03:01:33,180 INFO L82 GeneralOperation]: Start removeDead. Operand has 172 places, 192 transitions, 426 flow [2023-08-04 03:01:33,189 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 172 places, 192 transitions, 426 flow [2023-08-04 03:01:33,192 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:01:33,198 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 172 places, 192 transitions, 426 flow [2023-08-04 03:01:33,200 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 172 places, 192 transitions, 426 flow [2023-08-04 03:01:33,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 172 places, 192 transitions, 426 flow [2023-08-04 03:01:33,262 INFO L124 PetriNetUnfolderBase]: 101/660 cut-off events. [2023-08-04 03:01:33,263 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 03:01:33,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 721 conditions, 660 events. 101/660 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3225 event pairs, 0 based on Foata normal form. 0/549 useless extension candidates. Maximal degree in co-relation 373. Up to 16 conditions per place. [2023-08-04 03:01:33,273 INFO L119 LiptonReduction]: Number of co-enabled transitions 5220 [2023-08-04 03:01:37,085 INFO L134 LiptonReduction]: Checked pairs total: 8556 [2023-08-04 03:01:37,085 INFO L136 LiptonReduction]: Total number of compositions: 167 [2023-08-04 03:01:37,117 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 03:01:37,123 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;@39f05183, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:01:37,123 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 03:01:37,128 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:01:37,128 INFO L124 PetriNetUnfolderBase]: 4/33 cut-off events. [2023-08-04 03:01:37,128 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 03:01:37,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:01:37,129 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-04 03:01:37,130 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:01:37,135 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:01:37,135 INFO L85 PathProgramCache]: Analyzing trace with hash 187120231, now seen corresponding path program 1 times [2023-08-04 03:01:37,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:01:37,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674562192] [2023-08-04 03:01:37,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:01:37,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:01:37,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 03:01:37,303 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 03:01:37,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 03:01:37,371 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 03:01:37,376 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 03:01:37,377 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 03:01:37,378 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 03:01:37,378 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 03:01:37,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 03:01:37,379 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 03:01:37,382 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-04 03:01:37,388 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 03:01:37,388 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 03:01:37,432 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 03:01:37,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 205 places, 234 transitions, 558 flow [2023-08-04 03:01:37,847 INFO L124 PetriNetUnfolderBase]: 891/4149 cut-off events. [2023-08-04 03:01:37,847 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 03:01:37,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4823 conditions, 4149 events. 891/4149 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 33208 event pairs, 22 based on Foata normal form. 0/3502 useless extension candidates. Maximal degree in co-relation 2466. Up to 192 conditions per place. [2023-08-04 03:01:37,881 INFO L82 GeneralOperation]: Start removeDead. Operand has 205 places, 234 transitions, 558 flow [2023-08-04 03:01:37,906 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 205 places, 234 transitions, 558 flow [2023-08-04 03:01:37,907 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:01:37,907 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 205 places, 234 transitions, 558 flow [2023-08-04 03:01:37,907 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 205 places, 234 transitions, 558 flow [2023-08-04 03:01:37,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 205 places, 234 transitions, 558 flow [2023-08-04 03:01:38,274 INFO L124 PetriNetUnfolderBase]: 891/4149 cut-off events. [2023-08-04 03:01:38,275 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 03:01:38,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4823 conditions, 4149 events. 891/4149 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 33208 event pairs, 22 based on Foata normal form. 0/3502 useless extension candidates. Maximal degree in co-relation 2466. Up to 192 conditions per place. [2023-08-04 03:01:38,368 INFO L119 LiptonReduction]: Number of co-enabled transitions 13500 [2023-08-04 03:01:43,240 INFO L134 LiptonReduction]: Checked pairs total: 27130 [2023-08-04 03:01:43,241 INFO L136 LiptonReduction]: Total number of compositions: 191 [2023-08-04 03:01:43,242 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 03:01:43,243 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;@39f05183, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:01:43,243 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 03:01:43,251 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:01:43,251 INFO L124 PetriNetUnfolderBase]: 16/117 cut-off events. [2023-08-04 03:01:43,251 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-08-04 03:01:43,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:01:43,251 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-04 03:01:43,251 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 03:01:43,252 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:01:43,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1217987521, now seen corresponding path program 1 times [2023-08-04 03:01:43,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:01:43,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443513750] [2023-08-04 03:01:43,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:01:43,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:01:43,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:01:43,353 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 03:01:43,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:01:43,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443513750] [2023-08-04 03:01:43,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443513750] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:01:43,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348518258] [2023-08-04 03:01:43,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:01:43,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:01:43,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:01:43,369 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 03:01:43,382 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 03:01:43,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:01:43,495 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:01:43,497 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:01:43,567 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 03:01:43,567 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:01:43,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348518258] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:01:43,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:01:43,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 03:01:43,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815424057] [2023-08-04 03:01:43,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:01:43,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:01:43,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:01:43,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:01:43,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 03:01:43,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 425 [2023-08-04 03:01:43,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 73 transitions, 236 flow. Second operand has 5 states, 5 states have (on average 182.8) internal successors, (914), 5 states have internal predecessors, (914), 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 03:01:43,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:01:43,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 425 [2023-08-04 03:01:43,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:02:09,530 INFO L124 PetriNetUnfolderBase]: 284660/341186 cut-off events. [2023-08-04 03:02:09,530 INFO L125 PetriNetUnfolderBase]: For 33361/33361 co-relation queries the response was YES. [2023-08-04 03:02:10,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 692248 conditions, 341186 events. 284660/341186 cut-off events. For 33361/33361 co-relation queries the response was YES. Maximal size of possible extension queue 6506. Compared 1655106 event pairs, 99499 based on Foata normal form. 0/191732 useless extension candidates. Maximal degree in co-relation 225735. Up to 329948 conditions per place. [2023-08-04 03:02:10,700 INFO L140 encePairwiseOnDemand]: 420/425 looper letters, 34 selfloop transitions, 5 changer transitions 31/81 dead transitions. [2023-08-04 03:02:10,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 81 transitions, 382 flow [2023-08-04 03:02:10,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:02:10,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:02:10,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 974 transitions. [2023-08-04 03:02:10,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583529411764706 [2023-08-04 03:02:10,715 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 974 transitions. [2023-08-04 03:02:10,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 974 transitions. [2023-08-04 03:02:10,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:02:10,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 974 transitions. [2023-08-04 03:02:10,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 194.8) internal successors, (974), 5 states have internal predecessors, (974), 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 03:02:10,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 425.0) internal successors, (2550), 6 states have internal predecessors, (2550), 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 03:02:10,737 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 425.0) internal successors, (2550), 6 states have internal predecessors, (2550), 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 03:02:10,738 INFO L175 Difference]: Start difference. First operand has 61 places, 73 transitions, 236 flow. Second operand 5 states and 974 transitions. [2023-08-04 03:02:10,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 81 transitions, 382 flow [2023-08-04 03:02:10,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 81 transitions, 374 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 03:02:10,779 INFO L231 Difference]: Finished difference. Result has 62 places, 43 transitions, 133 flow [2023-08-04 03:02:10,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=133, PETRI_PLACES=62, PETRI_TRANSITIONS=43} [2023-08-04 03:02:10,783 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 1 predicate places. [2023-08-04 03:02:10,783 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 43 transitions, 133 flow [2023-08-04 03:02:10,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 182.8) internal successors, (914), 5 states have internal predecessors, (914), 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 03:02:10,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:02:10,784 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 03:02:10,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 03:02:10,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:02:10,990 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:02:10,990 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:02:10,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1066504250, now seen corresponding path program 1 times [2023-08-04 03:02:10,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:02:10,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817963518] [2023-08-04 03:02:10,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:02:10,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:02:11,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:02:11,046 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 03:02:11,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:02:11,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817963518] [2023-08-04 03:02:11,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817963518] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:02:11,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:02:11,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 03:02:11,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85096446] [2023-08-04 03:02:11,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:02:11,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:02:11,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:02:11,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:02:11,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:02:11,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 425 [2023-08-04 03:02:11,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 43 transitions, 133 flow. Second operand has 3 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 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 03:02:11,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:02:11,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 425 [2023-08-04 03:02:11,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:02:14,460 INFO L124 PetriNetUnfolderBase]: 37881/44947 cut-off events. [2023-08-04 03:02:14,460 INFO L125 PetriNetUnfolderBase]: For 1783/1783 co-relation queries the response was YES. [2023-08-04 03:02:14,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91344 conditions, 44947 events. 37881/44947 cut-off events. For 1783/1783 co-relation queries the response was YES. Maximal size of possible extension queue 975. Compared 164844 event pairs, 16093 based on Foata normal form. 1/25176 useless extension candidates. Maximal degree in co-relation 26223. Up to 43927 conditions per place. [2023-08-04 03:02:14,731 INFO L140 encePairwiseOnDemand]: 422/425 looper letters, 32 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-08-04 03:02:14,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 45 transitions, 204 flow [2023-08-04 03:02:14,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:02:14,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:02:14,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 580 transitions. [2023-08-04 03:02:14,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4549019607843137 [2023-08-04 03:02:14,733 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 580 transitions. [2023-08-04 03:02:14,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 580 transitions. [2023-08-04 03:02:14,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:02:14,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 580 transitions. [2023-08-04 03:02:14,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 193.33333333333334) internal successors, (580), 3 states have internal predecessors, (580), 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 03:02:14,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 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 03:02:14,737 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 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 03:02:14,737 INFO L175 Difference]: Start difference. First operand has 62 places, 43 transitions, 133 flow. Second operand 3 states and 580 transitions. [2023-08-04 03:02:14,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 45 transitions, 204 flow [2023-08-04 03:02:14,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 45 transitions, 199 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-04 03:02:14,740 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 127 flow [2023-08-04 03:02:14,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=127, PETRI_PLACES=50, PETRI_TRANSITIONS=42} [2023-08-04 03:02:14,740 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -11 predicate places. [2023-08-04 03:02:14,741 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 127 flow [2023-08-04 03:02:14,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 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 03:02:14,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:02:14,741 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:02:14,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 03:02:14,741 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:02:14,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:02:14,741 INFO L85 PathProgramCache]: Analyzing trace with hash -823815440, now seen corresponding path program 1 times [2023-08-04 03:02:14,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:02:14,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67229044] [2023-08-04 03:02:14,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:02:14,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:02:14,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:02:14,957 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 03:02:14,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:02:14,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67229044] [2023-08-04 03:02:14,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67229044] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:02:14,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445449505] [2023-08-04 03:02:14,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:02:14,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:02:14,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:02:14,975 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:02:14,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 03:02:15,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:02:15,054 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:02:15,055 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:02:15,067 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 03:02:15,067 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:02:15,082 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 03:02:15,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445449505] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:02:15,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:02:15,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 03:02:15,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982998145] [2023-08-04 03:02:15,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:02:15,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:02:15,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:02:15,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:02:15,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:02:15,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 425 [2023-08-04 03:02:15,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 42 transitions, 127 flow. Second operand has 5 states, 5 states have (on average 183.8) internal successors, (919), 5 states have internal predecessors, (919), 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 03:02:15,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:02:15,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 425 [2023-08-04 03:02:15,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:02:17,300 INFO L124 PetriNetUnfolderBase]: 29927/35235 cut-off events. [2023-08-04 03:02:17,301 INFO L125 PetriNetUnfolderBase]: For 1130/1130 co-relation queries the response was YES. [2023-08-04 03:02:17,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71350 conditions, 35235 events. 29927/35235 cut-off events. For 1130/1130 co-relation queries the response was YES. Maximal size of possible extension queue 757. Compared 121598 event pairs, 9807 based on Foata normal form. 3/19650 useless extension candidates. Maximal degree in co-relation 51577. Up to 34437 conditions per place. [2023-08-04 03:02:17,677 INFO L140 encePairwiseOnDemand]: 422/425 looper letters, 34 selfloop transitions, 3 changer transitions 0/48 dead transitions. [2023-08-04 03:02:17,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 48 transitions, 212 flow [2023-08-04 03:02:17,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:02:17,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:02:17,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 762 transitions. [2023-08-04 03:02:17,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44823529411764707 [2023-08-04 03:02:17,680 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 762 transitions. [2023-08-04 03:02:17,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 762 transitions. [2023-08-04 03:02:17,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:02:17,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 762 transitions. [2023-08-04 03:02:17,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 190.5) internal successors, (762), 4 states have internal predecessors, (762), 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 03:02:17,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 425.0) internal successors, (2125), 5 states have internal predecessors, (2125), 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 03:02:17,684 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 425.0) internal successors, (2125), 5 states have internal predecessors, (2125), 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 03:02:17,685 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 127 flow. Second operand 4 states and 762 transitions. [2023-08-04 03:02:17,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 48 transitions, 212 flow [2023-08-04 03:02:17,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 48 transitions, 208 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 03:02:17,687 INFO L231 Difference]: Finished difference. Result has 51 places, 41 transitions, 124 flow [2023-08-04 03:02:17,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=124, PETRI_PLACES=51, PETRI_TRANSITIONS=41} [2023-08-04 03:02:17,691 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -10 predicate places. [2023-08-04 03:02:17,692 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 41 transitions, 124 flow [2023-08-04 03:02:17,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 183.8) internal successors, (919), 5 states have internal predecessors, (919), 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 03:02:17,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:02:17,693 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:02:17,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 03:02:17,898 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,SelfDestructingSolverStorable3 [2023-08-04 03:02:17,899 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:02:17,899 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:02:17,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1690248519, now seen corresponding path program 1 times [2023-08-04 03:02:17,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:02:17,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335846672] [2023-08-04 03:02:17,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:02:17,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:02:17,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:02:17,980 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 03:02:17,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:02:17,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335846672] [2023-08-04 03:02:17,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335846672] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:02:17,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565340113] [2023-08-04 03:02:17,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:02:17,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:02:17,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:02:17,999 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:02:18,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 03:02:18,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:02:18,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:02:18,074 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:02:18,090 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 03:02:18,090 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:02:18,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565340113] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:02:18,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:02:18,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 03:02:18,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595663937] [2023-08-04 03:02:18,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:02:18,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:02:18,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:02:18,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:02:18,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 03:02:18,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 425 [2023-08-04 03:02:18,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 41 transitions, 124 flow. Second operand has 5 states, 5 states have (on average 183.8) internal successors, (919), 5 states have internal predecessors, (919), 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 03:02:18,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:02:18,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 425 [2023-08-04 03:02:18,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:02:20,082 INFO L124 PetriNetUnfolderBase]: 27665/33261 cut-off events. [2023-08-04 03:02:20,083 INFO L125 PetriNetUnfolderBase]: For 916/916 co-relation queries the response was YES. [2023-08-04 03:02:20,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66940 conditions, 33261 events. 27665/33261 cut-off events. For 916/916 co-relation queries the response was YES. Maximal size of possible extension queue 782. Compared 128250 event pairs, 4237 based on Foata normal form. 0/18885 useless extension candidates. Maximal degree in co-relation 24164. Up to 31128 conditions per place. [2023-08-04 03:02:20,225 INFO L140 encePairwiseOnDemand]: 421/425 looper letters, 47 selfloop transitions, 5 changer transitions 0/62 dead transitions. [2023-08-04 03:02:20,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 62 transitions, 268 flow [2023-08-04 03:02:20,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:02:20,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:02:20,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 957 transitions. [2023-08-04 03:02:20,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45035294117647057 [2023-08-04 03:02:20,228 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 957 transitions. [2023-08-04 03:02:20,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 957 transitions. [2023-08-04 03:02:20,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:02:20,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 957 transitions. [2023-08-04 03:02:20,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 191.4) internal successors, (957), 5 states have internal predecessors, (957), 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 03:02:20,232 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 425.0) internal successors, (2550), 6 states have internal predecessors, (2550), 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 03:02:20,233 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 425.0) internal successors, (2550), 6 states have internal predecessors, (2550), 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 03:02:20,233 INFO L175 Difference]: Start difference. First operand has 51 places, 41 transitions, 124 flow. Second operand 5 states and 957 transitions. [2023-08-04 03:02:20,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 62 transitions, 268 flow [2023-08-04 03:02:20,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 62 transitions, 261 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 03:02:20,234 INFO L231 Difference]: Finished difference. Result has 51 places, 43 transitions, 136 flow [2023-08-04 03:02:20,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=136, PETRI_PLACES=51, PETRI_TRANSITIONS=43} [2023-08-04 03:02:20,235 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -10 predicate places. [2023-08-04 03:02:20,235 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 43 transitions, 136 flow [2023-08-04 03:02:20,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 183.8) internal successors, (919), 5 states have internal predecessors, (919), 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 03:02:20,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:02:20,236 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:02:20,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 03:02:20,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:02:20,440 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:02:20,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:02:20,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1887102854, now seen corresponding path program 1 times [2023-08-04 03:02:20,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:02:20,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336505133] [2023-08-04 03:02:20,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:02:20,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:02:20,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:02:20,480 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 03:02:20,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:02:20,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336505133] [2023-08-04 03:02:20,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336505133] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:02:20,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:02:20,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 03:02:20,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136115443] [2023-08-04 03:02:20,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:02:20,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:02:20,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:02:20,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:02:20,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:02:20,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 425 [2023-08-04 03:02:20,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 43 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 186.0) internal successors, (558), 3 states have internal predecessors, (558), 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 03:02:20,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:02:20,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 425 [2023-08-04 03:02:20,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:02:22,771 INFO L124 PetriNetUnfolderBase]: 26273/31464 cut-off events. [2023-08-04 03:02:22,771 INFO L125 PetriNetUnfolderBase]: For 1068/1068 co-relation queries the response was YES. [2023-08-04 03:02:22,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63535 conditions, 31464 events. 26273/31464 cut-off events. For 1068/1068 co-relation queries the response was YES. Maximal size of possible extension queue 788. Compared 118439 event pairs, 11329 based on Foata normal form. 9/17864 useless extension candidates. Maximal degree in co-relation 22894. Up to 30056 conditions per place. [2023-08-04 03:02:22,941 INFO L140 encePairwiseOnDemand]: 422/425 looper letters, 37 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2023-08-04 03:02:22,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 49 transitions, 225 flow [2023-08-04 03:02:22,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:02:22,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:02:22,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 584 transitions. [2023-08-04 03:02:22,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45803921568627454 [2023-08-04 03:02:22,963 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 584 transitions. [2023-08-04 03:02:22,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 584 transitions. [2023-08-04 03:02:22,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:02:22,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 584 transitions. [2023-08-04 03:02:22,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 194.66666666666666) internal successors, (584), 3 states have internal predecessors, (584), 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 03:02:22,967 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 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 03:02:22,967 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 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 03:02:22,967 INFO L175 Difference]: Start difference. First operand has 51 places, 43 transitions, 136 flow. Second operand 3 states and 584 transitions. [2023-08-04 03:02:22,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 49 transitions, 225 flow [2023-08-04 03:02:22,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 49 transitions, 224 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:02:22,969 INFO L231 Difference]: Finished difference. Result has 52 places, 42 transitions, 134 flow [2023-08-04 03:02:22,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=52, PETRI_TRANSITIONS=42} [2023-08-04 03:02:22,971 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -9 predicate places. [2023-08-04 03:02:22,971 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 42 transitions, 134 flow [2023-08-04 03:02:22,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.0) internal successors, (558), 3 states have internal predecessors, (558), 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 03:02:22,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:02:22,971 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:02:22,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 03:02:22,971 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:02:22,972 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:02:22,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1317651217, now seen corresponding path program 1 times [2023-08-04 03:02:22,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:02:22,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204877902] [2023-08-04 03:02:22,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:02:22,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:02:23,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:02:23,052 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 03:02:23,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:02:23,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204877902] [2023-08-04 03:02:23,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204877902] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:02:23,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375790809] [2023-08-04 03:02:23,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:02:23,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:02:23,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:02:23,066 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:02:23,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 03:02:23,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:02:23,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:02:23,155 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:02:23,171 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 03:02:23,171 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:02:23,183 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 03:02:23,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375790809] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:02:23,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:02:23,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 03:02:23,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671856818] [2023-08-04 03:02:23,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:02:23,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:02:23,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:02:23,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:02:23,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:02:23,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 425 [2023-08-04 03:02:23,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 42 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 184.8) internal successors, (924), 5 states have internal predecessors, (924), 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 03:02:23,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:02:23,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 425 [2023-08-04 03:02:23,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:02:25,091 INFO L124 PetriNetUnfolderBase]: 20873/24849 cut-off events. [2023-08-04 03:02:25,091 INFO L125 PetriNetUnfolderBase]: For 888/888 co-relation queries the response was YES. [2023-08-04 03:02:25,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50224 conditions, 24849 events. 20873/24849 cut-off events. For 888/888 co-relation queries the response was YES. Maximal size of possible extension queue 756. Compared 89604 event pairs, 7009 based on Foata normal form. 27/14075 useless extension candidates. Maximal degree in co-relation 18049. Up to 23180 conditions per place. [2023-08-04 03:02:25,212 INFO L140 encePairwiseOnDemand]: 422/425 looper letters, 43 selfloop transitions, 3 changer transitions 0/56 dead transitions. [2023-08-04 03:02:25,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 56 transitions, 253 flow [2023-08-04 03:02:25,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:02:25,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:02:25,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 770 transitions. [2023-08-04 03:02:25,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45294117647058824 [2023-08-04 03:02:25,215 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 770 transitions. [2023-08-04 03:02:25,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 770 transitions. [2023-08-04 03:02:25,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:02:25,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 770 transitions. [2023-08-04 03:02:25,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 192.5) internal successors, (770), 4 states have internal predecessors, (770), 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 03:02:25,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 425.0) internal successors, (2125), 5 states have internal predecessors, (2125), 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 03:02:25,218 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 425.0) internal successors, (2125), 5 states have internal predecessors, (2125), 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 03:02:25,218 INFO L175 Difference]: Start difference. First operand has 52 places, 42 transitions, 134 flow. Second operand 4 states and 770 transitions. [2023-08-04 03:02:25,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 56 transitions, 253 flow [2023-08-04 03:02:25,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 56 transitions, 249 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 03:02:25,220 INFO L231 Difference]: Finished difference. Result has 53 places, 41 transitions, 131 flow [2023-08-04 03:02:25,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=131, PETRI_PLACES=53, PETRI_TRANSITIONS=41} [2023-08-04 03:02:25,220 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -8 predicate places. [2023-08-04 03:02:25,221 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 41 transitions, 131 flow [2023-08-04 03:02:25,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 184.8) internal successors, (924), 5 states have internal predecessors, (924), 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 03:02:25,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:02:25,221 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:02:25,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 03:02:25,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:02:25,426 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:02:25,426 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:02:25,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1451485315, now seen corresponding path program 1 times [2023-08-04 03:02:25,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:02:25,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133808865] [2023-08-04 03:02:25,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:02:25,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:02:25,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:02:25,503 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 03:02:25,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:02:25,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133808865] [2023-08-04 03:02:25,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133808865] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:02:25,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762713436] [2023-08-04 03:02:25,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:02:25,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:02:25,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:02:25,504 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:02:25,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 03:02:25,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:02:25,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:02:25,597 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:02:25,620 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 03:02:25,620 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:02:25,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762713436] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:02:25,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:02:25,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 03:02:25,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559673758] [2023-08-04 03:02:25,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:02:25,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:02:25,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:02:25,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:02:25,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 03:02:25,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 425 [2023-08-04 03:02:25,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 41 transitions, 131 flow. Second operand has 5 states, 5 states have (on average 184.8) internal successors, (924), 5 states have internal predecessors, (924), 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 03:02:25,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:02:25,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 425 [2023-08-04 03:02:25,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:02:26,896 INFO L124 PetriNetUnfolderBase]: 15041/18045 cut-off events. [2023-08-04 03:02:26,896 INFO L125 PetriNetUnfolderBase]: For 753/753 co-relation queries the response was YES. [2023-08-04 03:02:26,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36670 conditions, 18045 events. 15041/18045 cut-off events. For 753/753 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 65450 event pairs, 703 based on Foata normal form. 729/10889 useless extension candidates. Maximal degree in co-relation 14872. Up to 7614 conditions per place. [2023-08-04 03:02:26,944 INFO L140 encePairwiseOnDemand]: 422/425 looper letters, 0 selfloop transitions, 0 changer transitions 72/72 dead transitions. [2023-08-04 03:02:26,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 72 transitions, 317 flow [2023-08-04 03:02:26,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:02:26,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:02:26,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 967 transitions. [2023-08-04 03:02:26,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45505882352941174 [2023-08-04 03:02:26,947 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 967 transitions. [2023-08-04 03:02:26,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 967 transitions. [2023-08-04 03:02:26,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:02:26,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 967 transitions. [2023-08-04 03:02:26,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 193.4) internal successors, (967), 5 states have internal predecessors, (967), 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 03:02:26,950 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 425.0) internal successors, (2550), 6 states have internal predecessors, (2550), 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 03:02:26,951 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 425.0) internal successors, (2550), 6 states have internal predecessors, (2550), 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 03:02:26,951 INFO L175 Difference]: Start difference. First operand has 53 places, 41 transitions, 131 flow. Second operand 5 states and 967 transitions. [2023-08-04 03:02:26,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 72 transitions, 317 flow [2023-08-04 03:02:26,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 72 transitions, 310 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 03:02:26,963 INFO L231 Difference]: Finished difference. Result has 52 places, 0 transitions, 0 flow [2023-08-04 03:02:26,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=52, PETRI_TRANSITIONS=0} [2023-08-04 03:02:26,963 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -9 predicate places. [2023-08-04 03:02:26,963 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 0 transitions, 0 flow [2023-08-04 03:02:26,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 184.8) internal successors, (924), 5 states have internal predecessors, (924), 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 03:02:26,964 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 03:02:26,964 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 03:02:26,964 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 03:02:26,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 03:02:27,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:02:27,169 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:02:27,170 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (1/2) [2023-08-04 03:02:27,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 205 places, 234 transitions, 558 flow [2023-08-04 03:02:27,572 INFO L124 PetriNetUnfolderBase]: 891/4149 cut-off events. [2023-08-04 03:02:27,572 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 03:02:27,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4823 conditions, 4149 events. 891/4149 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 33208 event pairs, 22 based on Foata normal form. 0/3502 useless extension candidates. Maximal degree in co-relation 2466. Up to 192 conditions per place. [2023-08-04 03:02:27,586 INFO L82 GeneralOperation]: Start removeDead. Operand has 205 places, 234 transitions, 558 flow [2023-08-04 03:02:27,594 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 205 places, 234 transitions, 558 flow [2023-08-04 03:02:27,594 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:02:27,594 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 205 places, 234 transitions, 558 flow [2023-08-04 03:02:27,594 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 205 places, 234 transitions, 558 flow [2023-08-04 03:02:27,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 205 places, 234 transitions, 558 flow [2023-08-04 03:02:27,858 INFO L124 PetriNetUnfolderBase]: 891/4149 cut-off events. [2023-08-04 03:02:27,859 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 03:02:27,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4823 conditions, 4149 events. 891/4149 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 33208 event pairs, 22 based on Foata normal form. 0/3502 useless extension candidates. Maximal degree in co-relation 2466. Up to 192 conditions per place. [2023-08-04 03:02:27,927 INFO L119 LiptonReduction]: Number of co-enabled transitions 13500 [2023-08-04 03:02:32,652 INFO L134 LiptonReduction]: Checked pairs total: 29274 [2023-08-04 03:02:32,652 INFO L136 LiptonReduction]: Total number of compositions: 192 [2023-08-04 03:02:32,654 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 03:02:32,654 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;@39f05183, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:02:32,654 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 03:02:32,657 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:02:32,657 INFO L124 PetriNetUnfolderBase]: 4/33 cut-off events. [2023-08-04 03:02:32,657 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 03:02:32,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:02:32,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:02:32,657 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:02:32,657 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:02:32,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1488925582, now seen corresponding path program 1 times [2023-08-04 03:02:32,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:02:32,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162094637] [2023-08-04 03:02:32,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:02:32,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:02:32,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:02:32,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:02:32,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:02:32,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162094637] [2023-08-04 03:02:32,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162094637] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:02:32,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:02:32,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 03:02:32,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400269292] [2023-08-04 03:02:32,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:02:32,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:02:32,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:02:32,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:02:32,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:02:32,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 426 [2023-08-04 03:02:32,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 73 transitions, 236 flow. Second operand has 3 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 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 03:02:32,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:02:32,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 426 [2023-08-04 03:02:32,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:02:56,767 INFO L124 PetriNetUnfolderBase]: 282559/337065 cut-off events. [2023-08-04 03:02:56,768 INFO L125 PetriNetUnfolderBase]: For 35700/35700 co-relation queries the response was YES. [2023-08-04 03:02:57,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 685343 conditions, 337065 events. 282559/337065 cut-off events. For 35700/35700 co-relation queries the response was YES. Maximal size of possible extension queue 6293. Compared 1585952 event pairs, 121223 based on Foata normal form. 0/188807 useless extension candidates. Maximal degree in co-relation 224681. Up to 327393 conditions per place. [2023-08-04 03:02:59,185 INFO L140 encePairwiseOnDemand]: 422/426 looper letters, 59 selfloop transitions, 2 changer transitions 3/76 dead transitions. [2023-08-04 03:02:59,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 76 transitions, 364 flow [2023-08-04 03:02:59,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:02:59,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:02:59,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 609 transitions. [2023-08-04 03:02:59,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4765258215962441 [2023-08-04 03:02:59,187 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 609 transitions. [2023-08-04 03:02:59,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 609 transitions. [2023-08-04 03:02:59,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:02:59,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 609 transitions. [2023-08-04 03:02:59,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 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 03:02:59,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 426.0) internal successors, (1704), 4 states have internal predecessors, (1704), 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 03:02:59,189 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 426.0) internal successors, (1704), 4 states have internal predecessors, (1704), 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 03:02:59,189 INFO L175 Difference]: Start difference. First operand has 61 places, 73 transitions, 236 flow. Second operand 3 states and 609 transitions. [2023-08-04 03:02:59,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 76 transitions, 364 flow [2023-08-04 03:02:59,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 76 transitions, 364 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 03:02:59,208 INFO L231 Difference]: Finished difference. Result has 63 places, 70 transitions, 228 flow [2023-08-04 03:02:59,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=426, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=228, PETRI_PLACES=63, PETRI_TRANSITIONS=70} [2023-08-04 03:02:59,209 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 2 predicate places. [2023-08-04 03:02:59,209 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 70 transitions, 228 flow [2023-08-04 03:02:59,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 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 03:02:59,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:02:59,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:02:59,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 03:02:59,209 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:02:59,209 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:02:59,210 INFO L85 PathProgramCache]: Analyzing trace with hash -568609746, now seen corresponding path program 1 times [2023-08-04 03:02:59,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:02:59,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497764065] [2023-08-04 03:02:59,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:02:59,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:02:59,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:02:59,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:02:59,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:02:59,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497764065] [2023-08-04 03:02:59,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497764065] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:02:59,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708288998] [2023-08-04 03:02:59,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:02:59,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:02:59,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:02:59,250 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:02:59,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 03:02:59,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:02:59,321 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 03:02:59,322 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:02:59,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 03:02:59,326 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:02:59,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708288998] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:02:59,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:02:59,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 03:02:59,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476388542] [2023-08-04 03:02:59,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:02:59,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:02:59,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:02:59,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:02:59,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:02:59,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 426 [2023-08-04 03:02:59,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 70 transitions, 228 flow. Second operand has 3 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 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 03:02:59,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:02:59,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 426 [2023-08-04 03:02:59,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand