/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 PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-min-max-inc-dec.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 09:14:52,429 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 09:14:52,486 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 09:14:52,490 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 09:14:52,491 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 09:14:52,491 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 09:14:52,492 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 09:14:52,512 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 09:14:52,513 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 09:14:52,515 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 09:14:52,516 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 09:14:52,516 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 09:14:52,516 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 09:14:52,517 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 09:14:52,518 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 09:14:52,518 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 09:14:52,518 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 09:14:52,518 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 09:14:52,518 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 09:14:52,518 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 09:14:52,519 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 09:14:52,519 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 09:14:52,519 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 09:14:52,519 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 09:14:52,519 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 09:14:52,520 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 09:14:52,520 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 09:14:52,521 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 09:14:52,521 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 09:14:52,521 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 09:14:52,522 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:14:52,522 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 09:14:52,522 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 09:14:52,522 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 09:14:52,522 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 09:14:52,522 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 09:14:52,523 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 09:14:52,523 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 09:14:52,523 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 09:14:52,523 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 09:14:52,523 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 09:14:52,523 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 09:14:52,693 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 09:14:52,705 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 09:14:52,707 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 09:14:52,707 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 09:14:52,708 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 09:14:52,708 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-min-max-inc-dec.wvr_bound2.c [2023-08-04 09:14:53,757 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 09:14:53,932 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 09:14:53,932 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-min-max-inc-dec.wvr_bound2.c [2023-08-04 09:14:53,941 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea10f92d7/4f3ba133e3e44e28bda0ffab40ea4bcf/FLAG50fceab8f [2023-08-04 09:14:53,959 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea10f92d7/4f3ba133e3e44e28bda0ffab40ea4bcf [2023-08-04 09:14:53,964 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 09:14:53,965 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 09:14:53,968 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 09:14:53,968 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 09:14:53,971 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 09:14:53,971 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:14:53" (1/1) ... [2023-08-04 09:14:53,972 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e2e0225 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:14:53, skipping insertion in model container [2023-08-04 09:14:53,972 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:14:53" (1/1) ... [2023-08-04 09:14:54,003 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 09:14:54,190 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-min-max-inc-dec.wvr_bound2.c[3676,3689] [2023-08-04 09:14:54,193 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:14:54,199 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 09:14:54,222 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-min-max-inc-dec.wvr_bound2.c[3676,3689] [2023-08-04 09:14:54,224 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:14:54,230 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:14:54,230 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:14:54,235 INFO L206 MainTranslator]: Completed translation [2023-08-04 09:14:54,235 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:14:54 WrapperNode [2023-08-04 09:14:54,235 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 09:14:54,236 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 09:14:54,236 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 09:14:54,236 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 09:14:54,242 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:14:54" (1/1) ... [2023-08-04 09:14:54,250 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:14:54" (1/1) ... [2023-08-04 09:14:54,269 INFO L138 Inliner]: procedures = 27, calls = 75, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 256 [2023-08-04 09:14:54,270 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 09:14:54,270 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 09:14:54,270 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 09:14:54,271 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 09:14:54,278 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:14:54" (1/1) ... [2023-08-04 09:14:54,278 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:14:54" (1/1) ... [2023-08-04 09:14:54,283 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:14:54" (1/1) ... [2023-08-04 09:14:54,283 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:14:54" (1/1) ... [2023-08-04 09:14:54,290 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:14:54" (1/1) ... [2023-08-04 09:14:54,299 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:14:54" (1/1) ... [2023-08-04 09:14:54,301 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:14:54" (1/1) ... [2023-08-04 09:14:54,303 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:14:54" (1/1) ... [2023-08-04 09:14:54,306 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 09:14:54,306 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 09:14:54,307 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 09:14:54,307 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 09:14:54,307 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:14:54" (1/1) ... [2023-08-04 09:14:54,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:14:54,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:14:54,342 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 09:14:54,348 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 09:14:54,373 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 09:14:54,373 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 09:14:54,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 09:14:54,373 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 09:14:54,373 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 09:14:54,374 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 09:14:54,374 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 09:14:54,374 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 09:14:54,374 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 09:14:54,376 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 09:14:54,376 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-04 09:14:54,376 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-04 09:14:54,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 09:14:54,377 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2023-08-04 09:14:54,377 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2023-08-04 09:14:54,377 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 09:14:54,377 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 09:14:54,377 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 09:14:54,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 09:14:54,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 09:14:54,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 09:14:54,379 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 09:14:54,496 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 09:14:54,497 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 09:14:54,779 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 09:14:54,830 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 09:14:54,830 INFO L302 CfgBuilder]: Removed 15 assume(true) statements. [2023-08-04 09:14:54,832 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:14:54 BoogieIcfgContainer [2023-08-04 09:14:54,832 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 09:14:54,833 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 09:14:54,833 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 09:14:54,835 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 09:14:54,835 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 09:14:53" (1/3) ... [2023-08-04 09:14:54,836 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6884e7d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:14:54, skipping insertion in model container [2023-08-04 09:14:54,836 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:14:54" (2/3) ... [2023-08-04 09:14:54,836 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6884e7d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:14:54, skipping insertion in model container [2023-08-04 09:14:54,836 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:14:54" (3/3) ... [2023-08-04 09:14:54,837 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-min-max-inc-dec.wvr_bound2.c [2023-08-04 09:14:54,841 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 09:14:54,847 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 09:14:54,847 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 09:14:54,847 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 09:14:54,947 INFO L144 ThreadInstanceAdder]: Constructed 25 joinOtherThreadTransitions. [2023-08-04 09:14:54,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 275 transitions, 650 flow [2023-08-04 09:14:55,394 INFO L124 PetriNetUnfolderBase]: 689/3414 cut-off events. [2023-08-04 09:14:55,394 INFO L125 PetriNetUnfolderBase]: For 400/400 co-relation queries the response was YES. [2023-08-04 09:14:55,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3913 conditions, 3414 events. 689/3414 cut-off events. For 400/400 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 28291 event pairs, 0 based on Foata normal form. 0/2871 useless extension candidates. Maximal degree in co-relation 1893. Up to 81 conditions per place. [2023-08-04 09:14:55,446 INFO L82 GeneralOperation]: Start removeDead. Operand has 237 places, 275 transitions, 650 flow [2023-08-04 09:14:55,463 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 237 places, 275 transitions, 650 flow [2023-08-04 09:14:55,465 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:14:55,477 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 237 places, 275 transitions, 650 flow [2023-08-04 09:14:55,480 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 237 places, 275 transitions, 650 flow [2023-08-04 09:14:55,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 275 transitions, 650 flow [2023-08-04 09:14:55,758 INFO L124 PetriNetUnfolderBase]: 689/3414 cut-off events. [2023-08-04 09:14:55,758 INFO L125 PetriNetUnfolderBase]: For 400/400 co-relation queries the response was YES. [2023-08-04 09:14:55,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3913 conditions, 3414 events. 689/3414 cut-off events. For 400/400 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 28291 event pairs, 0 based on Foata normal form. 0/2871 useless extension candidates. Maximal degree in co-relation 1893. Up to 81 conditions per place. [2023-08-04 09:14:55,807 INFO L119 LiptonReduction]: Number of co-enabled transitions 14210 [2023-08-04 09:15:02,156 INFO L134 LiptonReduction]: Checked pairs total: 42653 [2023-08-04 09:15:02,156 INFO L136 LiptonReduction]: Total number of compositions: 221 [2023-08-04 09:15:02,166 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:15:02,169 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;@7e7948f0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:15:02,170 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:15:02,178 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:15:02,179 INFO L124 PetriNetUnfolderBase]: 15/138 cut-off events. [2023-08-04 09:15:02,179 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-04 09:15:02,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:15:02,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:15:02,180 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:15:02,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:15:02,183 INFO L85 PathProgramCache]: Analyzing trace with hash 317516950, now seen corresponding path program 1 times [2023-08-04 09:15:02,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:15:02,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985303351] [2023-08-04 09:15:02,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:15:02,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:15:02,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:15:02,431 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 09:15:02,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:15:02,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985303351] [2023-08-04 09:15:02,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985303351] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:15:02,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:15:02,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:15:02,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776677422] [2023-08-04 09:15:02,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:15:02,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:15:02,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:15:02,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:15:02,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:15:02,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 496 [2023-08-04 09:15:02,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 89 transitions, 278 flow. Second operand has 3 states, 3 states have (on average 219.0) internal successors, (657), 3 states have internal predecessors, (657), 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 09:15:02,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:15:02,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 496 [2023-08-04 09:15:02,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:15:08,960 INFO L124 PetriNetUnfolderBase]: 89302/115877 cut-off events. [2023-08-04 09:15:08,961 INFO L125 PetriNetUnfolderBase]: For 8884/8884 co-relation queries the response was YES. [2023-08-04 09:15:09,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235391 conditions, 115877 events. 89302/115877 cut-off events. For 8884/8884 co-relation queries the response was YES. Maximal size of possible extension queue 3261. Compared 688982 event pairs, 39524 based on Foata normal form. 0/79051 useless extension candidates. Maximal degree in co-relation 195580. Up to 110727 conditions per place. [2023-08-04 09:15:09,538 INFO L140 encePairwiseOnDemand]: 492/496 looper letters, 78 selfloop transitions, 2 changer transitions 6/93 dead transitions. [2023-08-04 09:15:09,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 93 transitions, 448 flow [2023-08-04 09:15:09,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:15:09,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:15:09,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 728 transitions. [2023-08-04 09:15:09,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.489247311827957 [2023-08-04 09:15:09,552 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 728 transitions. [2023-08-04 09:15:09,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 728 transitions. [2023-08-04 09:15:09,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:15:09,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 728 transitions. [2023-08-04 09:15:09,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 242.66666666666666) internal successors, (728), 3 states have internal predecessors, (728), 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 09:15:09,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 496.0) internal successors, (1984), 4 states have internal predecessors, (1984), 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 09:15:09,568 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 496.0) internal successors, (1984), 4 states have internal predecessors, (1984), 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 09:15:09,569 INFO L175 Difference]: Start difference. First operand has 70 places, 89 transitions, 278 flow. Second operand 3 states and 728 transitions. [2023-08-04 09:15:09,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 93 transitions, 448 flow [2023-08-04 09:15:09,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 93 transitions, 448 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:15:09,604 INFO L231 Difference]: Finished difference. Result has 72 places, 83 transitions, 264 flow [2023-08-04 09:15:09,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=496, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=264, PETRI_PLACES=72, PETRI_TRANSITIONS=83} [2023-08-04 09:15:09,608 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 2 predicate places. [2023-08-04 09:15:09,608 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 83 transitions, 264 flow [2023-08-04 09:15:09,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 219.0) internal successors, (657), 3 states have internal predecessors, (657), 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 09:15:09,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:15:09,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:15:09,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 09:15:09,610 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:15:09,615 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:15:09,616 INFO L85 PathProgramCache]: Analyzing trace with hash 845564543, now seen corresponding path program 1 times [2023-08-04 09:15:09,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:15:09,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539654709] [2023-08-04 09:15:09,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:15:09,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:15:09,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:15:09,716 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 09:15:09,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:15:09,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539654709] [2023-08-04 09:15:09,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539654709] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:15:09,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087904424] [2023-08-04 09:15:09,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:15:09,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:15:09,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:15:09,720 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 09:15:09,724 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 09:15:09,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:15:09,815 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:15:09,817 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:15:09,827 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 09:15:09,827 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:15:09,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087904424] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:15:09,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:15:09,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:15:09,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265183544] [2023-08-04 09:15:09,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:15:09,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:15:09,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:15:09,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:15:09,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:15:09,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 496 [2023-08-04 09:15:09,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 83 transitions, 264 flow. Second operand has 3 states, 3 states have (on average 220.0) internal successors, (660), 3 states have internal predecessors, (660), 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 09:15:09,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:15:09,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 496 [2023-08-04 09:15:09,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:15:15,689 INFO L124 PetriNetUnfolderBase]: 86830/112149 cut-off events. [2023-08-04 09:15:15,689 INFO L125 PetriNetUnfolderBase]: For 8623/8623 co-relation queries the response was YES. [2023-08-04 09:15:15,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227778 conditions, 112149 events. 86830/112149 cut-off events. For 8623/8623 co-relation queries the response was YES. Maximal size of possible extension queue 3261. Compared 657185 event pairs, 38762 based on Foata normal form. 0/76528 useless extension candidates. Maximal degree in co-relation 227732. Up to 107474 conditions per place. [2023-08-04 09:15:16,260 INFO L140 encePairwiseOnDemand]: 493/496 looper letters, 82 selfloop transitions, 2 changer transitions 1/92 dead transitions. [2023-08-04 09:15:16,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 92 transitions, 452 flow [2023-08-04 09:15:16,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:15:16,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:15:16,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 731 transitions. [2023-08-04 09:15:16,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49126344086021506 [2023-08-04 09:15:16,263 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 731 transitions. [2023-08-04 09:15:16,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 731 transitions. [2023-08-04 09:15:16,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:15:16,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 731 transitions. [2023-08-04 09:15:16,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 243.66666666666666) internal successors, (731), 3 states have internal predecessors, (731), 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 09:15:16,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 496.0) internal successors, (1984), 4 states have internal predecessors, (1984), 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 09:15:16,270 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 496.0) internal successors, (1984), 4 states have internal predecessors, (1984), 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 09:15:16,270 INFO L175 Difference]: Start difference. First operand has 72 places, 83 transitions, 264 flow. Second operand 3 states and 731 transitions. [2023-08-04 09:15:16,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 92 transitions, 452 flow [2023-08-04 09:15:16,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 92 transitions, 418 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-04 09:15:16,307 INFO L231 Difference]: Finished difference. Result has 63 places, 83 transitions, 238 flow [2023-08-04 09:15:16,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=496, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=238, PETRI_PLACES=63, PETRI_TRANSITIONS=83} [2023-08-04 09:15:16,307 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -7 predicate places. [2023-08-04 09:15:16,308 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 83 transitions, 238 flow [2023-08-04 09:15:16,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 220.0) internal successors, (660), 3 states have internal predecessors, (660), 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 09:15:16,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:15:16,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:15:16,315 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 09:15:16,515 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 09:15:16,515 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:15:16,515 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:15:16,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1377581073, now seen corresponding path program 1 times [2023-08-04 09:15:16,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:15:16,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797574286] [2023-08-04 09:15:16,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:15:16,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:15:16,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:15:16,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 09:15:16,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:15:16,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797574286] [2023-08-04 09:15:16,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797574286] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:15:16,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358727295] [2023-08-04 09:15:16,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:15:16,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:15:16,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:15:16,590 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 09:15:16,610 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 09:15:16,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:15:16,697 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:15:16,698 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:15:16,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 09:15:16,703 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:15:16,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358727295] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:15:16,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:15:16,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:15:16,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319611520] [2023-08-04 09:15:16,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:15:16,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:15:16,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:15:16,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:15:16,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:15:16,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 496 [2023-08-04 09:15:16,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 83 transitions, 238 flow. Second operand has 3 states, 3 states have (on average 221.0) internal successors, (663), 3 states have internal predecessors, (663), 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 09:15:16,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:15:16,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 496 [2023-08-04 09:15:16,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:15:22,497 INFO L124 PetriNetUnfolderBase]: 84430/109061 cut-off events. [2023-08-04 09:15:22,498 INFO L125 PetriNetUnfolderBase]: For 544/544 co-relation queries the response was YES. [2023-08-04 09:15:22,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221229 conditions, 109061 events. 84430/109061 cut-off events. For 544/544 co-relation queries the response was YES. Maximal size of possible extension queue 3225. Compared 634767 event pairs, 49908 based on Foata normal form. 0/74456 useless extension candidates. Maximal degree in co-relation 175807. Up to 104230 conditions per place. [2023-08-04 09:15:22,972 INFO L140 encePairwiseOnDemand]: 493/496 looper letters, 84 selfloop transitions, 2 changer transitions 1/94 dead transitions. [2023-08-04 09:15:22,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 94 transitions, 434 flow [2023-08-04 09:15:22,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:15:22,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:15:22,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 733 transitions. [2023-08-04 09:15:22,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49260752688172044 [2023-08-04 09:15:22,975 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 733 transitions. [2023-08-04 09:15:22,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 733 transitions. [2023-08-04 09:15:22,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:15:22,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 733 transitions. [2023-08-04 09:15:22,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 244.33333333333334) internal successors, (733), 3 states have internal predecessors, (733), 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 09:15:22,978 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 496.0) internal successors, (1984), 4 states have internal predecessors, (1984), 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 09:15:22,979 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 496.0) internal successors, (1984), 4 states have internal predecessors, (1984), 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 09:15:22,979 INFO L175 Difference]: Start difference. First operand has 63 places, 83 transitions, 238 flow. Second operand 3 states and 733 transitions. [2023-08-04 09:15:22,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 94 transitions, 434 flow [2023-08-04 09:15:22,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 94 transitions, 430 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:15:22,982 INFO L231 Difference]: Finished difference. Result has 64 places, 83 transitions, 242 flow [2023-08-04 09:15:22,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=496, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=64, PETRI_TRANSITIONS=83} [2023-08-04 09:15:22,984 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -6 predicate places. [2023-08-04 09:15:22,984 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 83 transitions, 242 flow [2023-08-04 09:15:22,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 221.0) internal successors, (663), 3 states have internal predecessors, (663), 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 09:15:22,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:15:22,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:15:22,991 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 09:15:23,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-04 09:15:23,189 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:15:23,189 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:15:23,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1848498744, now seen corresponding path program 1 times [2023-08-04 09:15:23,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:15:23,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407774576] [2023-08-04 09:15:23,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:15:23,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:15:23,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:15:23,224 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 09:15:23,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:15:23,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407774576] [2023-08-04 09:15:23,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407774576] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:15:23,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315550158] [2023-08-04 09:15:23,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:15:23,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:15:23,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:15:23,226 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 09:15:23,228 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 09:15:23,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:15:23,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:15:23,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:15:23,311 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:15:23,311 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:15:23,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315550158] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:15:23,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:15:23,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:15:23,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460410142] [2023-08-04 09:15:23,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:15:23,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:15:23,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:15:23,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:15:23,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:15:23,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 496 [2023-08-04 09:15:23,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 83 transitions, 242 flow. Second operand has 3 states, 3 states have (on average 222.0) internal successors, (666), 3 states have internal predecessors, (666), 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 09:15:23,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:15:23,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 496 [2023-08-04 09:15:23,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:15:28,801 INFO L124 PetriNetUnfolderBase]: 82910/107157 cut-off events. [2023-08-04 09:15:28,802 INFO L125 PetriNetUnfolderBase]: For 434/434 co-relation queries the response was YES. [2023-08-04 09:15:28,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217482 conditions, 107157 events. 82910/107157 cut-off events. For 434/434 co-relation queries the response was YES. Maximal size of possible extension queue 3233. Compared 627154 event pairs, 44032 based on Foata normal form. 0/73224 useless extension candidates. Maximal degree in co-relation 172999. Up to 101654 conditions per place. [2023-08-04 09:15:29,263 INFO L140 encePairwiseOnDemand]: 493/496 looper letters, 86 selfloop transitions, 2 changer transitions 1/96 dead transitions. [2023-08-04 09:15:29,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 96 transitions, 446 flow [2023-08-04 09:15:29,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:15:29,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:15:29,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 735 transitions. [2023-08-04 09:15:29,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4939516129032258 [2023-08-04 09:15:29,265 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 735 transitions. [2023-08-04 09:15:29,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 735 transitions. [2023-08-04 09:15:29,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:15:29,266 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 735 transitions. [2023-08-04 09:15:29,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 245.0) internal successors, (735), 3 states have internal predecessors, (735), 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 09:15:29,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 496.0) internal successors, (1984), 4 states have internal predecessors, (1984), 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 09:15:29,269 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 496.0) internal successors, (1984), 4 states have internal predecessors, (1984), 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 09:15:29,269 INFO L175 Difference]: Start difference. First operand has 64 places, 83 transitions, 242 flow. Second operand 3 states and 735 transitions. [2023-08-04 09:15:29,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 96 transitions, 446 flow [2023-08-04 09:15:29,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 96 transitions, 442 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:15:29,272 INFO L231 Difference]: Finished difference. Result has 65 places, 83 transitions, 246 flow [2023-08-04 09:15:29,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=496, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=246, PETRI_PLACES=65, PETRI_TRANSITIONS=83} [2023-08-04 09:15:29,273 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -5 predicate places. [2023-08-04 09:15:29,273 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 83 transitions, 246 flow [2023-08-04 09:15:29,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 222.0) internal successors, (666), 3 states have internal predecessors, (666), 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 09:15:29,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:15:29,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:15:29,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-04 09:15:29,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:15:29,478 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:15:29,478 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:15:29,478 INFO L85 PathProgramCache]: Analyzing trace with hash -432385150, now seen corresponding path program 1 times [2023-08-04 09:15:29,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:15:29,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457824105] [2023-08-04 09:15:29,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:15:29,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:15:29,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:15:29,514 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:15:29,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:15:29,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457824105] [2023-08-04 09:15:29,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457824105] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:15:29,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577786764] [2023-08-04 09:15:29,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:15:29,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:15:29,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:15:29,515 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 09:15:29,517 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 09:15:29,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:15:29,593 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:15:29,594 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:15:29,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 09:15:29,599 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:15:29,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577786764] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:15:29,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:15:29,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:15:29,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901760284] [2023-08-04 09:15:29,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:15:29,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:15:29,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:15:29,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:15:29,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:15:29,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 496 [2023-08-04 09:15:29,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 83 transitions, 246 flow. Second operand has 3 states, 3 states have (on average 223.0) internal successors, (669), 3 states have internal predecessors, (669), 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 09:15:29,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:15:29,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 496 [2023-08-04 09:15:29,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:15:35,451 INFO L124 PetriNetUnfolderBase]: 82766/107013 cut-off events. [2023-08-04 09:15:35,451 INFO L125 PetriNetUnfolderBase]: For 258/258 co-relation queries the response was YES. [2023-08-04 09:15:35,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217531 conditions, 107013 events. 82766/107013 cut-off events. For 258/258 co-relation queries the response was YES. Maximal size of possible extension queue 2970. Compared 613656 event pairs, 41904 based on Foata normal form. 0/73368 useless extension candidates. Maximal degree in co-relation 173035. Up to 99126 conditions per place. [2023-08-04 09:15:35,941 INFO L140 encePairwiseOnDemand]: 493/496 looper letters, 87 selfloop transitions, 2 changer transitions 1/97 dead transitions. [2023-08-04 09:15:35,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 97 transitions, 454 flow [2023-08-04 09:15:35,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:15:35,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:15:35,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 736 transitions. [2023-08-04 09:15:35,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4946236559139785 [2023-08-04 09:15:35,943 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 736 transitions. [2023-08-04 09:15:35,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 736 transitions. [2023-08-04 09:15:35,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:15:35,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 736 transitions. [2023-08-04 09:15:35,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 245.33333333333334) internal successors, (736), 3 states have internal predecessors, (736), 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 09:15:35,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 496.0) internal successors, (1984), 4 states have internal predecessors, (1984), 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 09:15:35,948 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 496.0) internal successors, (1984), 4 states have internal predecessors, (1984), 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 09:15:35,948 INFO L175 Difference]: Start difference. First operand has 65 places, 83 transitions, 246 flow. Second operand 3 states and 736 transitions. [2023-08-04 09:15:35,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 97 transitions, 454 flow [2023-08-04 09:15:35,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 97 transitions, 450 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:15:35,953 INFO L231 Difference]: Finished difference. Result has 66 places, 83 transitions, 250 flow [2023-08-04 09:15:35,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=496, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=250, PETRI_PLACES=66, PETRI_TRANSITIONS=83} [2023-08-04 09:15:35,954 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -4 predicate places. [2023-08-04 09:15:35,954 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 83 transitions, 250 flow [2023-08-04 09:15:35,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 223.0) internal successors, (669), 3 states have internal predecessors, (669), 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 09:15:35,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:15:35,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:15:35,973 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-04 09:15:36,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:15:36,158 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:15:36,159 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:15:36,159 INFO L85 PathProgramCache]: Analyzing trace with hash 851796176, now seen corresponding path program 1 times [2023-08-04 09:15:36,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:15:36,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995983478] [2023-08-04 09:15:36,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:15:36,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:15:36,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:15:36,249 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 09:15:36,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:15:36,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995983478] [2023-08-04 09:15:36,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995983478] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:15:36,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963356461] [2023-08-04 09:15:36,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:15:36,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:15:36,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:15:36,253 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 09:15:36,255 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 09:15:36,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:15:36,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:15:36,330 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:15:36,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 09:15:36,340 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:15:36,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963356461] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:15:36,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:15:36,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:15:36,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14826597] [2023-08-04 09:15:36,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:15:36,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:15:36,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:15:36,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:15:36,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:15:36,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 496 [2023-08-04 09:15:36,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 83 transitions, 250 flow. Second operand has 3 states, 3 states have (on average 224.0) internal successors, (672), 3 states have internal predecessors, (672), 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 09:15:36,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:15:36,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 496 [2023-08-04 09:15:36,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:15:40,658 INFO L124 PetriNetUnfolderBase]: 59422/77237 cut-off events. [2023-08-04 09:15:40,658 INFO L125 PetriNetUnfolderBase]: For 610/610 co-relation queries the response was YES. [2023-08-04 09:15:40,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158844 conditions, 77237 events. 59422/77237 cut-off events. For 610/610 co-relation queries the response was YES. Maximal size of possible extension queue 2367. Compared 430149 event pairs, 32052 based on Foata normal form. 0/52936 useless extension candidates. Maximal degree in co-relation 127987. Up to 68494 conditions per place. [2023-08-04 09:15:40,966 INFO L140 encePairwiseOnDemand]: 493/496 looper letters, 94 selfloop transitions, 2 changer transitions 0/103 dead transitions. [2023-08-04 09:15:40,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 103 transitions, 492 flow [2023-08-04 09:15:40,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:15:40,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:15:40,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 742 transitions. [2023-08-04 09:15:40,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4986559139784946 [2023-08-04 09:15:40,968 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 742 transitions. [2023-08-04 09:15:40,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 742 transitions. [2023-08-04 09:15:40,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:15:40,972 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 742 transitions. [2023-08-04 09:15:40,973 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 247.33333333333334) internal successors, (742), 3 states have internal predecessors, (742), 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 09:15:40,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 496.0) internal successors, (1984), 4 states have internal predecessors, (1984), 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 09:15:40,976 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 496.0) internal successors, (1984), 4 states have internal predecessors, (1984), 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 09:15:40,976 INFO L175 Difference]: Start difference. First operand has 66 places, 83 transitions, 250 flow. Second operand 3 states and 742 transitions. [2023-08-04 09:15:40,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 103 transitions, 492 flow [2023-08-04 09:15:40,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 103 transitions, 488 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:15:40,983 INFO L231 Difference]: Finished difference. Result has 67 places, 84 transitions, 258 flow [2023-08-04 09:15:40,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=496, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=258, PETRI_PLACES=67, PETRI_TRANSITIONS=84} [2023-08-04 09:15:40,984 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -3 predicate places. [2023-08-04 09:15:40,984 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 84 transitions, 258 flow [2023-08-04 09:15:40,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 224.0) internal successors, (672), 3 states have internal predecessors, (672), 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 09:15:40,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:15:40,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:15:40,989 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 09:15:41,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:15:41,189 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:15:41,189 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:15:41,189 INFO L85 PathProgramCache]: Analyzing trace with hash -264201831, now seen corresponding path program 1 times [2023-08-04 09:15:41,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:15:41,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887290033] [2023-08-04 09:15:41,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:15:41,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:15:41,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:15:41,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 09:15:41,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:15:41,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887290033] [2023-08-04 09:15:41,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887290033] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:15:41,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177981071] [2023-08-04 09:15:41,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:15:41,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:15:41,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:15:41,262 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 09:15:41,281 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 09:15:41,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:15:41,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:15:41,357 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:15:41,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 09:15:41,369 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:15:41,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177981071] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:15:41,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:15:41,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:15:41,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320370793] [2023-08-04 09:15:41,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:15:41,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:15:41,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:15:41,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:15:41,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:15:41,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 496 [2023-08-04 09:15:41,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 84 transitions, 258 flow. Second operand has 3 states, 3 states have (on average 225.33333333333334) internal successors, (676), 3 states have internal predecessors, (676), 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 09:15:41,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:15:41,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 496 [2023-08-04 09:15:41,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:15:44,555 INFO L124 PetriNetUnfolderBase]: 43122/56793 cut-off events. [2023-08-04 09:15:44,555 INFO L125 PetriNetUnfolderBase]: For 2146/2146 co-relation queries the response was YES. [2023-08-04 09:15:44,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119429 conditions, 56793 events. 43122/56793 cut-off events. For 2146/2146 co-relation queries the response was YES. Maximal size of possible extension queue 1391. Compared 310120 event pairs, 21512 based on Foata normal form. 0/40444 useless extension candidates. Maximal degree in co-relation 96893. Up to 44402 conditions per place. [2023-08-04 09:15:44,869 INFO L140 encePairwiseOnDemand]: 493/496 looper letters, 95 selfloop transitions, 2 changer transitions 0/104 dead transitions. [2023-08-04 09:15:44,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 104 transitions, 502 flow [2023-08-04 09:15:44,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:15:44,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:15:44,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 742 transitions. [2023-08-04 09:15:44,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4986559139784946 [2023-08-04 09:15:44,871 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 742 transitions. [2023-08-04 09:15:44,871 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 742 transitions. [2023-08-04 09:15:44,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:15:44,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 742 transitions. [2023-08-04 09:15:44,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 247.33333333333334) internal successors, (742), 3 states have internal predecessors, (742), 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 09:15:44,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 496.0) internal successors, (1984), 4 states have internal predecessors, (1984), 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 09:15:44,875 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 496.0) internal successors, (1984), 4 states have internal predecessors, (1984), 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 09:15:44,875 INFO L175 Difference]: Start difference. First operand has 67 places, 84 transitions, 258 flow. Second operand 3 states and 742 transitions. [2023-08-04 09:15:44,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 104 transitions, 502 flow [2023-08-04 09:15:44,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 104 transitions, 500 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:15:44,900 INFO L231 Difference]: Finished difference. Result has 69 places, 85 transitions, 268 flow [2023-08-04 09:15:44,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=496, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=268, PETRI_PLACES=69, PETRI_TRANSITIONS=85} [2023-08-04 09:15:44,901 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -1 predicate places. [2023-08-04 09:15:44,901 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 85 transitions, 268 flow [2023-08-04 09:15:44,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 225.33333333333334) internal successors, (676), 3 states have internal predecessors, (676), 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 09:15:44,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:15:44,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:15:44,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 09:15:45,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:15:45,108 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:15:45,108 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:15:45,108 INFO L85 PathProgramCache]: Analyzing trace with hash 705619063, now seen corresponding path program 1 times [2023-08-04 09:15:45,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:15:45,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568295830] [2023-08-04 09:15:45,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:15:45,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:15:45,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:15:45,166 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 09:15:45,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:15:45,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568295830] [2023-08-04 09:15:45,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568295830] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:15:45,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886667621] [2023-08-04 09:15:45,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:15:45,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:15:45,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:15:45,182 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:15:45,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 09:15:45,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:15:45,308 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:15:45,309 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:15:45,319 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 09:15:45,319 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:15:45,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886667621] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:15:45,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:15:45,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:15:45,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607012617] [2023-08-04 09:15:45,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:15:45,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:15:45,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:15:45,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:15:45,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:15:45,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 496 [2023-08-04 09:15:45,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 85 transitions, 268 flow. Second operand has 3 states, 3 states have (on average 226.66666666666666) internal successors, (680), 3 states have internal predecessors, (680), 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 09:15:45,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:15:45,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 496 [2023-08-04 09:15:45,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:15:48,271 INFO L124 PetriNetUnfolderBase]: 37553/49520 cut-off events. [2023-08-04 09:15:48,271 INFO L125 PetriNetUnfolderBase]: For 3032/3032 co-relation queries the response was YES. [2023-08-04 09:15:48,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106378 conditions, 49520 events. 37553/49520 cut-off events. For 3032/3032 co-relation queries the response was YES. Maximal size of possible extension queue 1136. Compared 264255 event pairs, 21691 based on Foata normal form. 0/36297 useless extension candidates. Maximal degree in co-relation 86005. Up to 43911 conditions per place. [2023-08-04 09:15:48,485 INFO L140 encePairwiseOnDemand]: 493/496 looper letters, 96 selfloop transitions, 2 changer transitions 0/105 dead transitions. [2023-08-04 09:15:48,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 105 transitions, 514 flow [2023-08-04 09:15:48,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:15:48,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:15:48,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 742 transitions. [2023-08-04 09:15:48,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4986559139784946 [2023-08-04 09:15:48,487 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 742 transitions. [2023-08-04 09:15:48,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 742 transitions. [2023-08-04 09:15:48,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:15:48,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 742 transitions. [2023-08-04 09:15:48,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 247.33333333333334) internal successors, (742), 3 states have internal predecessors, (742), 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 09:15:48,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 496.0) internal successors, (1984), 4 states have internal predecessors, (1984), 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 09:15:48,490 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 496.0) internal successors, (1984), 4 states have internal predecessors, (1984), 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 09:15:48,490 INFO L175 Difference]: Start difference. First operand has 69 places, 85 transitions, 268 flow. Second operand 3 states and 742 transitions. [2023-08-04 09:15:48,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 105 transitions, 514 flow [2023-08-04 09:15:48,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 105 transitions, 512 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:15:48,819 INFO L231 Difference]: Finished difference. Result has 71 places, 86 transitions, 278 flow [2023-08-04 09:15:48,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=496, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=278, PETRI_PLACES=71, PETRI_TRANSITIONS=86} [2023-08-04 09:15:48,820 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 1 predicate places. [2023-08-04 09:15:48,820 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 86 transitions, 278 flow [2023-08-04 09:15:48,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 226.66666666666666) internal successors, (680), 3 states have internal predecessors, (680), 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 09:15:48,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:15:48,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:15:48,829 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-04 09:15:49,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:15:49,025 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:15:49,026 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:15:49,026 INFO L85 PathProgramCache]: Analyzing trace with hash 278131083, now seen corresponding path program 1 times [2023-08-04 09:15:49,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:15:49,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042706489] [2023-08-04 09:15:49,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:15:49,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:15:49,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:15:49,097 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 09:15:49,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:15:49,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042706489] [2023-08-04 09:15:49,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042706489] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:15:49,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231304438] [2023-08-04 09:15:49,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:15:49,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:15:49,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:15:49,099 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:15:49,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 09:15:49,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:15:49,197 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:15:49,202 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:15:49,207 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 09:15:49,207 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:15:49,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231304438] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:15:49,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:15:49,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:15:49,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217024589] [2023-08-04 09:15:49,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:15:49,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:15:49,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:15:49,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:15:49,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:15:49,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 496 [2023-08-04 09:15:49,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 86 transitions, 278 flow. Second operand has 3 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 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 09:15:49,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:15:49,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 496 [2023-08-04 09:15:49,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:15:52,066 INFO L124 PetriNetUnfolderBase]: 36852/48520 cut-off events. [2023-08-04 09:15:52,066 INFO L125 PetriNetUnfolderBase]: For 2687/2687 co-relation queries the response was YES. [2023-08-04 09:15:52,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104706 conditions, 48520 events. 36852/48520 cut-off events. For 2687/2687 co-relation queries the response was YES. Maximal size of possible extension queue 1136. Compared 257857 event pairs, 22721 based on Foata normal form. 0/35839 useless extension candidates. Maximal degree in co-relation 91417. Up to 46057 conditions per place. [2023-08-04 09:15:52,280 INFO L140 encePairwiseOnDemand]: 493/496 looper letters, 97 selfloop transitions, 2 changer transitions 0/106 dead transitions. [2023-08-04 09:15:52,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 106 transitions, 526 flow [2023-08-04 09:15:52,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:15:52,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:15:52,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 742 transitions. [2023-08-04 09:15:52,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4986559139784946 [2023-08-04 09:15:52,282 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 742 transitions. [2023-08-04 09:15:52,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 742 transitions. [2023-08-04 09:15:52,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:15:52,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 742 transitions. [2023-08-04 09:15:52,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 247.33333333333334) internal successors, (742), 3 states have internal predecessors, (742), 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 09:15:52,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 496.0) internal successors, (1984), 4 states have internal predecessors, (1984), 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 09:15:52,285 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 496.0) internal successors, (1984), 4 states have internal predecessors, (1984), 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 09:15:52,285 INFO L175 Difference]: Start difference. First operand has 71 places, 86 transitions, 278 flow. Second operand 3 states and 742 transitions. [2023-08-04 09:15:52,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 106 transitions, 526 flow [2023-08-04 09:15:52,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 106 transitions, 524 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:15:52,708 INFO L231 Difference]: Finished difference. Result has 73 places, 87 transitions, 288 flow [2023-08-04 09:15:52,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=496, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=288, PETRI_PLACES=73, PETRI_TRANSITIONS=87} [2023-08-04 09:15:52,709 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 3 predicate places. [2023-08-04 09:15:52,709 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 87 transitions, 288 flow [2023-08-04 09:15:52,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 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 09:15:52,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:15:52,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:15:52,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 09:15:52,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-08-04 09:15:52,913 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:15:52,914 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:15:52,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1602545071, now seen corresponding path program 1 times [2023-08-04 09:15:52,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:15:52,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169879395] [2023-08-04 09:15:52,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:15:52,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:15:52,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:15:52,970 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 09:15:52,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:15:52,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169879395] [2023-08-04 09:15:52,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169879395] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:15:52,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583799076] [2023-08-04 09:15:52,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:15:52,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:15:52,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:15:52,971 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:15:52,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 09:15:53,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:15:53,071 INFO L262 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:15:53,072 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:15:53,080 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 09:15:53,080 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:15:53,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583799076] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:15:53,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:15:53,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:15:53,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766938911] [2023-08-04 09:15:53,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:15:53,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:15:53,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:15:53,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:15:53,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:15:53,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 496 [2023-08-04 09:15:53,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 87 transitions, 288 flow. Second operand has 3 states, 3 states have (on average 230.0) internal successors, (690), 3 states have internal predecessors, (690), 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 09:15:53,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:15:53,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 496 [2023-08-04 09:15:53,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:15:55,662 INFO L124 PetriNetUnfolderBase]: 36834/48488 cut-off events. [2023-08-04 09:15:55,662 INFO L125 PetriNetUnfolderBase]: For 2391/2391 co-relation queries the response was YES. [2023-08-04 09:15:55,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104695 conditions, 48488 events. 36834/48488 cut-off events. For 2391/2391 co-relation queries the response was YES. Maximal size of possible extension queue 1136. Compared 257561 event pairs, 22998 based on Foata normal form. 0/35846 useless extension candidates. Maximal degree in co-relation 102424. Up to 46736 conditions per place. [2023-08-04 09:15:55,856 INFO L140 encePairwiseOnDemand]: 493/496 looper letters, 87 selfloop transitions, 2 changer transitions 5/101 dead transitions. [2023-08-04 09:15:55,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 101 transitions, 504 flow [2023-08-04 09:15:55,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:15:55,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:15:55,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 736 transitions. [2023-08-04 09:15:55,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4946236559139785 [2023-08-04 09:15:55,858 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 736 transitions. [2023-08-04 09:15:55,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 736 transitions. [2023-08-04 09:15:55,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:15:55,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 736 transitions. [2023-08-04 09:15:55,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 245.33333333333334) internal successors, (736), 3 states have internal predecessors, (736), 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 09:15:55,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 496.0) internal successors, (1984), 4 states have internal predecessors, (1984), 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 09:15:55,861 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 496.0) internal successors, (1984), 4 states have internal predecessors, (1984), 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 09:15:55,861 INFO L175 Difference]: Start difference. First operand has 73 places, 87 transitions, 288 flow. Second operand 3 states and 736 transitions. [2023-08-04 09:15:55,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 101 transitions, 504 flow [2023-08-04 09:15:56,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 101 transitions, 502 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:15:56,108 INFO L231 Difference]: Finished difference. Result has 75 places, 83 transitions, 278 flow [2023-08-04 09:15:56,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=496, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=278, PETRI_PLACES=75, PETRI_TRANSITIONS=83} [2023-08-04 09:15:56,109 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 5 predicate places. [2023-08-04 09:15:56,109 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 83 transitions, 278 flow [2023-08-04 09:15:56,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 230.0) internal successors, (690), 3 states have internal predecessors, (690), 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 09:15:56,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:15:56,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:15:56,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-04 09:15:56,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-04 09:15:56,310 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:15:56,311 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:15:56,311 INFO L85 PathProgramCache]: Analyzing trace with hash -2013158485, now seen corresponding path program 1 times [2023-08-04 09:15:56,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:15:56,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402928936] [2023-08-04 09:15:56,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:15:56,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:15:56,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:15:56,372 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 09:15:56,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:15:56,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402928936] [2023-08-04 09:15:56,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402928936] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:15:56,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348902162] [2023-08-04 09:15:56,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:15:56,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:15:56,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:15:56,397 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:15:56,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 09:15:56,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:15:56,712 INFO L262 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 09:15:56,713 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:15:56,739 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 09:15:56,739 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:15:56,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348902162] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:15:56,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:15:56,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:15:56,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875479051] [2023-08-04 09:15:56,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:15:56,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:15:56,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:15:56,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:15:56,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:15:56,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 496 [2023-08-04 09:15:56,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 83 transitions, 278 flow. Second operand has 3 states, 3 states have (on average 232.0) internal successors, (696), 3 states have internal predecessors, (696), 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 09:15:56,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:15:56,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 496 [2023-08-04 09:15:56,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:15:59,080 INFO L124 PetriNetUnfolderBase]: 29694/38533 cut-off events. [2023-08-04 09:15:59,080 INFO L125 PetriNetUnfolderBase]: For 1586/1586 co-relation queries the response was YES. [2023-08-04 09:15:59,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82329 conditions, 38533 events. 29694/38533 cut-off events. For 1586/1586 co-relation queries the response was YES. Maximal size of possible extension queue 956. Compared 192514 event pairs, 18636 based on Foata normal form. 1/28165 useless extension candidates. Maximal degree in co-relation 82122. Up to 37125 conditions per place. [2023-08-04 09:15:59,261 INFO L140 encePairwiseOnDemand]: 493/496 looper letters, 75 selfloop transitions, 2 changer transitions 0/84 dead transitions. [2023-08-04 09:15:59,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 84 transitions, 434 flow [2023-08-04 09:15:59,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:15:59,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:15:59,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 723 transitions. [2023-08-04 09:15:59,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48588709677419356 [2023-08-04 09:15:59,272 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 723 transitions. [2023-08-04 09:15:59,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 723 transitions. [2023-08-04 09:15:59,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:15:59,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 723 transitions. [2023-08-04 09:15:59,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 241.0) internal successors, (723), 3 states have internal predecessors, (723), 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 09:15:59,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 496.0) internal successors, (1984), 4 states have internal predecessors, (1984), 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 09:15:59,275 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 496.0) internal successors, (1984), 4 states have internal predecessors, (1984), 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 09:15:59,275 INFO L175 Difference]: Start difference. First operand has 75 places, 83 transitions, 278 flow. Second operand 3 states and 723 transitions. [2023-08-04 09:15:59,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 84 transitions, 434 flow [2023-08-04 09:15:59,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 84 transitions, 430 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:15:59,361 INFO L231 Difference]: Finished difference. Result has 76 places, 84 transitions, 286 flow [2023-08-04 09:15:59,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=496, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=286, PETRI_PLACES=76, PETRI_TRANSITIONS=84} [2023-08-04 09:15:59,361 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 6 predicate places. [2023-08-04 09:15:59,361 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 84 transitions, 286 flow [2023-08-04 09:15:59,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 232.0) internal successors, (696), 3 states have internal predecessors, (696), 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 09:15:59,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:15:59,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:15:59,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 09:15:59,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-04 09:15:59,569 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:15:59,569 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:15:59,569 INFO L85 PathProgramCache]: Analyzing trace with hash -295381499, now seen corresponding path program 1 times [2023-08-04 09:15:59,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:15:59,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25421109] [2023-08-04 09:15:59,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:15:59,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:15:59,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:15:59,617 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 09:15:59,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:15:59,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25421109] [2023-08-04 09:15:59,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25421109] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:15:59,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662925392] [2023-08-04 09:15:59,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:15:59,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:15:59,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:15:59,618 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:15:59,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 09:15:59,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:15:59,733 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:15:59,734 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:15:59,743 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 09:15:59,743 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:15:59,755 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 09:15:59,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662925392] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:15:59,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:15:59,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:15:59,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578647893] [2023-08-04 09:15:59,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:15:59,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:15:59,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:15:59,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:15:59,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:15:59,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 496 [2023-08-04 09:15:59,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 84 transitions, 286 flow. Second operand has 5 states, 5 states have (on average 225.2) internal successors, (1126), 5 states have internal predecessors, (1126), 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 09:15:59,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:15:59,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 496 [2023-08-04 09:15:59,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:15:59,792 INFO L124 PetriNetUnfolderBase]: 10/26 cut-off events. [2023-08-04 09:15:59,792 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:15:59,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 26 events. 10/26 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 35 event pairs, 0 based on Foata normal form. 4/27 useless extension candidates. Maximal degree in co-relation 62. Up to 16 conditions per place. [2023-08-04 09:15:59,792 INFO L140 encePairwiseOnDemand]: 493/496 looper letters, 0 selfloop transitions, 0 changer transitions 16/16 dead transitions. [2023-08-04 09:15:59,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 16 transitions, 78 flow [2023-08-04 09:15:59,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:15:59,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:15:59,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 872 transitions. [2023-08-04 09:15:59,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43951612903225806 [2023-08-04 09:15:59,794 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 872 transitions. [2023-08-04 09:15:59,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 872 transitions. [2023-08-04 09:15:59,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:15:59,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 872 transitions. [2023-08-04 09:15:59,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 218.0) internal successors, (872), 4 states have internal predecessors, (872), 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 09:15:59,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 496.0) internal successors, (2480), 5 states have internal predecessors, (2480), 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 09:15:59,797 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 496.0) internal successors, (2480), 5 states have internal predecessors, (2480), 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 09:15:59,797 INFO L175 Difference]: Start difference. First operand has 76 places, 84 transitions, 286 flow. Second operand 4 states and 872 transitions. [2023-08-04 09:15:59,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 16 transitions, 78 flow [2023-08-04 09:15:59,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 16 transitions, 72 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 09:15:59,798 INFO L231 Difference]: Finished difference. Result has 28 places, 0 transitions, 0 flow [2023-08-04 09:15:59,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=496, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=28, PETRI_TRANSITIONS=0} [2023-08-04 09:15:59,798 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -42 predicate places. [2023-08-04 09:15:59,798 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 0 transitions, 0 flow [2023-08-04 09:15:59,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 225.2) internal successors, (1126), 5 states have internal predecessors, (1126), 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 09:15:59,801 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 09:15:59,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-04 09:16:00,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-04 09:16:00,005 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:16:00,007 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 09:16:00,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 275 transitions, 650 flow [2023-08-04 09:16:00,193 INFO L124 PetriNetUnfolderBase]: 689/3414 cut-off events. [2023-08-04 09:16:00,194 INFO L125 PetriNetUnfolderBase]: For 400/400 co-relation queries the response was YES. [2023-08-04 09:16:00,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3913 conditions, 3414 events. 689/3414 cut-off events. For 400/400 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 28291 event pairs, 0 based on Foata normal form. 0/2871 useless extension candidates. Maximal degree in co-relation 1893. Up to 81 conditions per place. [2023-08-04 09:16:00,207 INFO L82 GeneralOperation]: Start removeDead. Operand has 237 places, 275 transitions, 650 flow [2023-08-04 09:16:00,215 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 237 places, 275 transitions, 650 flow [2023-08-04 09:16:00,215 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:16:00,215 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 237 places, 275 transitions, 650 flow [2023-08-04 09:16:00,215 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 237 places, 275 transitions, 650 flow [2023-08-04 09:16:00,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 275 transitions, 650 flow [2023-08-04 09:16:00,383 INFO L124 PetriNetUnfolderBase]: 689/3414 cut-off events. [2023-08-04 09:16:00,383 INFO L125 PetriNetUnfolderBase]: For 400/400 co-relation queries the response was YES. [2023-08-04 09:16:00,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3913 conditions, 3414 events. 689/3414 cut-off events. For 400/400 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 28291 event pairs, 0 based on Foata normal form. 0/2871 useless extension candidates. Maximal degree in co-relation 1893. Up to 81 conditions per place. [2023-08-04 09:16:00,423 INFO L119 LiptonReduction]: Number of co-enabled transitions 14210 [2023-08-04 09:16:06,813 INFO L134 LiptonReduction]: Checked pairs total: 39635 [2023-08-04 09:16:06,813 INFO L136 LiptonReduction]: Total number of compositions: 217 [2023-08-04 09:16:06,814 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 09:16:06,814 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;@7e7948f0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:16:06,814 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-04 09:16:06,816 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:16:06,816 INFO L124 PetriNetUnfolderBase]: 4/35 cut-off events. [2023-08-04 09:16:06,816 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:16:06,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:16:06,816 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-04 09:16:06,816 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-04 09:16:06,817 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:16:06,817 INFO L85 PathProgramCache]: Analyzing trace with hash -765366253, now seen corresponding path program 1 times [2023-08-04 09:16:06,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:16:06,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195071715] [2023-08-04 09:16:06,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:16:06,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:16:06,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:16:06,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 09:16:06,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:16:06,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195071715] [2023-08-04 09:16:06,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195071715] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:16:06,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:16:06,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 09:16:06,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164976060] [2023-08-04 09:16:06,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:16:06,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:16:06,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:16:06,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:16:06,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:16:06,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 492 [2023-08-04 09:16:06,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 89 transitions, 278 flow. Second operand has 3 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 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 09:16:06,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:16:06,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 492 [2023-08-04 09:16:06,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:16:12,476 INFO L124 PetriNetUnfolderBase]: 92207/119777 cut-off events. [2023-08-04 09:16:12,476 INFO L125 PetriNetUnfolderBase]: For 9361/9361 co-relation queries the response was YES. [2023-08-04 09:16:12,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243406 conditions, 119777 events. 92207/119777 cut-off events. For 9361/9361 co-relation queries the response was YES. Maximal size of possible extension queue 3260. Compared 712445 event pairs, 54285 based on Foata normal form. 0/81502 useless extension candidates. Maximal degree in co-relation 195626. Up to 114571 conditions per place. [2023-08-04 09:16:12,779 INFO L140 encePairwiseOnDemand]: 488/492 looper letters, 34 selfloop transitions, 2 changer transitions 46/89 dead transitions. [2023-08-04 09:16:12,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 89 transitions, 432 flow [2023-08-04 09:16:12,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:16:12,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:16:12,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 724 transitions. [2023-08-04 09:16:12,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4905149051490515 [2023-08-04 09:16:12,781 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 724 transitions. [2023-08-04 09:16:12,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 724 transitions. [2023-08-04 09:16:12,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:16:12,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 724 transitions. [2023-08-04 09:16:12,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 241.33333333333334) internal successors, (724), 3 states have internal predecessors, (724), 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 09:16:12,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 492.0) internal successors, (1968), 4 states have internal predecessors, (1968), 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 09:16:12,784 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 492.0) internal successors, (1968), 4 states have internal predecessors, (1968), 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 09:16:12,784 INFO L175 Difference]: Start difference. First operand has 70 places, 89 transitions, 278 flow. Second operand 3 states and 724 transitions. [2023-08-04 09:16:12,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 89 transitions, 432 flow [2023-08-04 09:16:12,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 89 transitions, 432 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:16:12,794 INFO L231 Difference]: Finished difference. Result has 72 places, 43 transitions, 121 flow [2023-08-04 09:16:12,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=492, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=72, PETRI_TRANSITIONS=43} [2023-08-04 09:16:12,795 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 2 predicate places. [2023-08-04 09:16:12,795 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 43 transitions, 121 flow [2023-08-04 09:16:12,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 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 09:16:12,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:16:12,795 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-04 09:16:12,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-04 09:16:12,795 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-04 09:16:12,795 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:16:12,795 INFO L85 PathProgramCache]: Analyzing trace with hash -546319295, now seen corresponding path program 1 times [2023-08-04 09:16:12,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:16:12,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613737116] [2023-08-04 09:16:12,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:16:12,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:16:12,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:16:12,812 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 09:16:12,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:16:12,833 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 09:16:12,833 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 09:16:12,833 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-08-04 09:16:12,833 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 5 remaining) [2023-08-04 09:16:12,833 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2023-08-04 09:16:12,833 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 5 remaining) [2023-08-04 09:16:12,833 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 5 remaining) [2023-08-04 09:16:12,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-04 09:16:12,834 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 09:16:12,834 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN,UNKNOWN (2/2) [2023-08-04 09:16:12,834 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 09:16:12,834 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 09:16:12,863 INFO L144 ThreadInstanceAdder]: Constructed 50 joinOtherThreadTransitions. [2023-08-04 09:16:12,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 291 places, 352 transitions, 914 flow [2023-08-04 09:16:23,750 INFO L124 PetriNetUnfolderBase]: 31491/98647 cut-off events. [2023-08-04 09:16:23,750 INFO L125 PetriNetUnfolderBase]: For 25842/25842 co-relation queries the response was YES. [2023-08-04 09:16:25,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125105 conditions, 98647 events. 31491/98647 cut-off events. For 25842/25842 co-relation queries the response was YES. Maximal size of possible extension queue 1436. Compared 1270589 event pairs, 1497 based on Foata normal form. 0/85468 useless extension candidates. Maximal degree in co-relation 61048. Up to 5120 conditions per place. [2023-08-04 09:16:25,034 INFO L82 GeneralOperation]: Start removeDead. Operand has 291 places, 352 transitions, 914 flow [2023-08-04 09:16:25,537 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 291 places, 352 transitions, 914 flow [2023-08-04 09:16:25,537 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:16:25,537 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 291 places, 352 transitions, 914 flow [2023-08-04 09:16:25,538 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 291 places, 352 transitions, 914 flow [2023-08-04 09:16:25,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 291 places, 352 transitions, 914 flow [2023-08-04 09:16:36,809 INFO L124 PetriNetUnfolderBase]: 31491/98647 cut-off events. [2023-08-04 09:16:36,809 INFO L125 PetriNetUnfolderBase]: For 25842/25842 co-relation queries the response was YES. [2023-08-04 09:16:38,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125105 conditions, 98647 events. 31491/98647 cut-off events. For 25842/25842 co-relation queries the response was YES. Maximal size of possible extension queue 1436. Compared 1270589 event pairs, 1497 based on Foata normal form. 0/85468 useless extension candidates. Maximal degree in co-relation 61048. Up to 5120 conditions per place. [2023-08-04 09:16:40,365 INFO L119 LiptonReduction]: Number of co-enabled transitions 38088 [2023-08-04 09:16:46,683 INFO L134 LiptonReduction]: Checked pairs total: 149330 [2023-08-04 09:16:46,683 INFO L136 LiptonReduction]: Total number of compositions: 252 [2023-08-04 09:16:46,685 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:16:46,685 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;@7e7948f0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:16:46,685 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:16:46,689 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:16:46,690 INFO L124 PetriNetUnfolderBase]: 11/119 cut-off events. [2023-08-04 09:16:46,690 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-04 09:16:46,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:16:46,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:16:46,690 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:16:46,690 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:16:46,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1700131405, now seen corresponding path program 1 times [2023-08-04 09:16:46,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:16:46,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025220648] [2023-08-04 09:16:46,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:16:46,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:16:46,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:16:46,717 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 09:16:46,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:16:46,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025220648] [2023-08-04 09:16:46,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025220648] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:16:46,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:16:46,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:16:46,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905837189] [2023-08-04 09:16:46,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:16:46,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:16:46,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:16:46,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:16:46,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:16:46,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 604 [2023-08-04 09:16:46,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 139 transitions, 488 flow. Second operand has 3 states, 3 states have (on average 256.0) internal successors, (768), 3 states have internal predecessors, (768), 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 09:16:46,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:16:46,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 604 [2023-08-04 09:16:46,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand