/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-more-array-sum-alt.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 09:17:03,424 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 09:17:03,470 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 09:17:03,473 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 09:17:03,474 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 09:17:03,474 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 09:17:03,474 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 09:17:03,492 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 09:17:03,493 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 09:17:03,493 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 09:17:03,493 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 09:17:03,494 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 09:17:03,494 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 09:17:03,494 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 09:17:03,495 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 09:17:03,495 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 09:17:03,495 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 09:17:03,496 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 09:17:03,496 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 09:17:03,496 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 09:17:03,497 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 09:17:03,497 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 09:17:03,497 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 09:17:03,497 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 09:17:03,498 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 09:17:03,498 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 09:17:03,498 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 09:17:03,499 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 09:17:03,499 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 09:17:03,499 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 09:17:03,499 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:17:03,499 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 09:17:03,500 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 09:17:03,500 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 09:17:03,500 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 09:17:03,500 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 09:17:03,500 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 09:17:03,501 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 09:17:03,501 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 09:17:03,501 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 09:17:03,501 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 09:17:03,501 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 09:17:03,676 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 09:17:03,692 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 09:17:03,694 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 09:17:03,695 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 09:17:03,696 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 09:17:03,697 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-array-sum-alt.wvr_bound2.c [2023-08-04 09:17:04,930 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 09:17:05,101 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 09:17:05,102 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-array-sum-alt.wvr_bound2.c [2023-08-04 09:17:05,109 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b8dba067/1dc0b37b33114b9c9678309fb59580e1/FLAGa5bca0f8c [2023-08-04 09:17:05,125 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b8dba067/1dc0b37b33114b9c9678309fb59580e1 [2023-08-04 09:17:05,131 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 09:17:05,133 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 09:17:05,136 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 09:17:05,136 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 09:17:05,139 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 09:17:05,140 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:17:05" (1/1) ... [2023-08-04 09:17:05,140 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75c83246 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:17:05, skipping insertion in model container [2023-08-04 09:17:05,141 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:17:05" (1/1) ... [2023-08-04 09:17:05,172 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 09:17:05,331 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-array-sum-alt.wvr_bound2.c[3004,3017] [2023-08-04 09:17:05,337 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:17:05,344 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 09:17:05,366 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-array-sum-alt.wvr_bound2.c[3004,3017] [2023-08-04 09:17:05,370 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:17:05,377 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:17:05,377 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:17:05,383 INFO L206 MainTranslator]: Completed translation [2023-08-04 09:17:05,383 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:17:05 WrapperNode [2023-08-04 09:17:05,383 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 09:17:05,384 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 09:17:05,384 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 09:17:05,384 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 09:17:05,390 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:17:05" (1/1) ... [2023-08-04 09:17:05,398 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:17:05" (1/1) ... [2023-08-04 09:17:05,420 INFO L138 Inliner]: procedures = 25, calls = 51, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 251 [2023-08-04 09:17:05,420 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 09:17:05,421 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 09:17:05,421 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 09:17:05,421 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 09:17:05,429 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:17:05" (1/1) ... [2023-08-04 09:17:05,429 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:17:05" (1/1) ... [2023-08-04 09:17:05,432 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:17:05" (1/1) ... [2023-08-04 09:17:05,433 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:17:05" (1/1) ... [2023-08-04 09:17:05,440 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:17:05" (1/1) ... [2023-08-04 09:17:05,444 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:17:05" (1/1) ... [2023-08-04 09:17:05,446 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:17:05" (1/1) ... [2023-08-04 09:17:05,447 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:17:05" (1/1) ... [2023-08-04 09:17:05,450 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 09:17:05,451 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 09:17:05,451 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 09:17:05,451 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 09:17:05,452 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:17:05" (1/1) ... [2023-08-04 09:17:05,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:17:05,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:17:05,480 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 09:17:05,486 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 09:17:05,514 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 09:17:05,514 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 09:17:05,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 09:17:05,514 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 09:17:05,514 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 09:17:05,515 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 09:17:05,515 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 09:17:05,515 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 09:17:05,515 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 09:17:05,516 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 09:17:05,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 09:17:05,518 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 09:17:05,518 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 09:17:05,518 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 09:17:05,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 09:17:05,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 09:17:05,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 09:17:05,520 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 09:17:05,617 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 09:17:05,618 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 09:17:06,024 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 09:17:06,185 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 09:17:06,185 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-04 09:17:06,187 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:17:06 BoogieIcfgContainer [2023-08-04 09:17:06,187 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 09:17:06,190 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 09:17:06,191 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 09:17:06,194 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 09:17:06,195 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 09:17:05" (1/3) ... [2023-08-04 09:17:06,196 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c769e72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:17:06, skipping insertion in model container [2023-08-04 09:17:06,197 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:17:05" (2/3) ... [2023-08-04 09:17:06,197 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c769e72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:17:06, skipping insertion in model container [2023-08-04 09:17:06,197 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:17:06" (3/3) ... [2023-08-04 09:17:06,198 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-more-array-sum-alt.wvr_bound2.c [2023-08-04 09:17:06,206 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 09:17:06,215 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 09:17:06,215 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 09:17:06,215 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 09:17:06,282 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 09:17:06,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 195 transitions, 432 flow [2023-08-04 09:17:06,466 INFO L124 PetriNetUnfolderBase]: 101/667 cut-off events. [2023-08-04 09:17:06,467 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:17:06,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 728 conditions, 667 events. 101/667 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3319 event pairs, 0 based on Foata normal form. 0/556 useless extension candidates. Maximal degree in co-relation 388. Up to 16 conditions per place. [2023-08-04 09:17:06,480 INFO L82 GeneralOperation]: Start removeDead. Operand has 175 places, 195 transitions, 432 flow [2023-08-04 09:17:06,486 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 175 places, 195 transitions, 432 flow [2023-08-04 09:17:06,490 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:17:06,498 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 175 places, 195 transitions, 432 flow [2023-08-04 09:17:06,500 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 175 places, 195 transitions, 432 flow [2023-08-04 09:17:06,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 195 transitions, 432 flow [2023-08-04 09:17:06,588 INFO L124 PetriNetUnfolderBase]: 101/667 cut-off events. [2023-08-04 09:17:06,588 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:17:06,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 728 conditions, 667 events. 101/667 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3319 event pairs, 0 based on Foata normal form. 0/556 useless extension candidates. Maximal degree in co-relation 388. Up to 16 conditions per place. [2023-08-04 09:17:06,602 INFO L119 LiptonReduction]: Number of co-enabled transitions 5808 [2023-08-04 09:17:11,274 INFO L134 LiptonReduction]: Checked pairs total: 11200 [2023-08-04 09:17:11,275 INFO L136 LiptonReduction]: Total number of compositions: 167 [2023-08-04 09:17:11,287 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:17:11,292 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;@58ef4216, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:17:11,293 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:17:11,300 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:17:11,300 INFO L124 PetriNetUnfolderBase]: 3/37 cut-off events. [2023-08-04 09:17:11,300 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:17:11,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:17:11,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:17:11,301 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:17:11,306 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:17:11,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1450587368, now seen corresponding path program 1 times [2023-08-04 09:17:11,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:17:11,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576569432] [2023-08-04 09:17:11,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:17:11,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:17:11,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:17:11,578 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 09:17:11,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:17:11,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576569432] [2023-08-04 09:17:11,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576569432] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:17:11,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:17:11,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:17:11,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562869342] [2023-08-04 09:17:11,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:17:11,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:17:11,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:17:11,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:17:11,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:17:11,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 362 [2023-08-04 09:17:11,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 52 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 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 09:17:11,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:17:11,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 362 [2023-08-04 09:17:11,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:17:12,190 INFO L124 PetriNetUnfolderBase]: 4152/5802 cut-off events. [2023-08-04 09:17:12,190 INFO L125 PetriNetUnfolderBase]: For 322/322 co-relation queries the response was YES. [2023-08-04 09:17:12,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11685 conditions, 5802 events. 4152/5802 cut-off events. For 322/322 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 29259 event pairs, 1774 based on Foata normal form. 0/3690 useless extension candidates. Maximal degree in co-relation 9827. Up to 5535 conditions per place. [2023-08-04 09:17:12,224 INFO L140 encePairwiseOnDemand]: 358/362 looper letters, 43 selfloop transitions, 2 changer transitions 4/55 dead transitions. [2023-08-04 09:17:12,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 55 transitions, 244 flow [2023-08-04 09:17:12,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:17:12,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:17:12,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 531 transitions. [2023-08-04 09:17:12,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4889502762430939 [2023-08-04 09:17:12,239 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 531 transitions. [2023-08-04 09:17:12,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 531 transitions. [2023-08-04 09:17:12,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:17:12,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 531 transitions. [2023-08-04 09:17:12,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 177.0) internal successors, (531), 3 states have internal predecessors, (531), 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 09:17:12,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 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 09:17:12,252 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 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 09:17:12,254 INFO L175 Difference]: Start difference. First operand has 46 places, 52 transitions, 146 flow. Second operand 3 states and 531 transitions. [2023-08-04 09:17:12,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 55 transitions, 244 flow [2023-08-04 09:17:12,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 55 transitions, 244 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:17:12,260 INFO L231 Difference]: Finished difference. Result has 48 places, 48 transitions, 140 flow [2023-08-04 09:17:12,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=48, PETRI_TRANSITIONS=48} [2023-08-04 09:17:12,264 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2023-08-04 09:17:12,264 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 48 transitions, 140 flow [2023-08-04 09:17:12,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 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 09:17:12,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:17:12,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:17:12,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 09:17:12,265 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:17:12,266 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:17:12,266 INFO L85 PathProgramCache]: Analyzing trace with hash 2044089811, now seen corresponding path program 1 times [2023-08-04 09:17:12,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:17:12,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000865474] [2023-08-04 09:17:12,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:17:12,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:17:12,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:17:12,382 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 09:17:12,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:17:12,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000865474] [2023-08-04 09:17:12,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000865474] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:17:12,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039122173] [2023-08-04 09:17:12,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:17:12,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:17:12,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:17:12,389 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 09:17:12,420 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 09:17:12,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:17:12,486 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:17:12,490 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:17:12,506 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 09:17:12,506 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:17:12,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039122173] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:17:12,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:17:12,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:17:12,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938793852] [2023-08-04 09:17:12,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:17:12,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:17:12,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:17:12,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:17:12,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:17:12,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 362 [2023-08-04 09:17:12,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 48 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 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 09:17:12,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:17:12,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 362 [2023-08-04 09:17:12,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:17:13,011 INFO L124 PetriNetUnfolderBase]: 4006/5533 cut-off events. [2023-08-04 09:17:13,011 INFO L125 PetriNetUnfolderBase]: For 293/293 co-relation queries the response was YES. [2023-08-04 09:17:13,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11156 conditions, 5533 events. 4006/5533 cut-off events. For 293/293 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 27369 event pairs, 1740 based on Foata normal form. 0/3501 useless extension candidates. Maximal degree in co-relation 9301. Up to 5290 conditions per place. [2023-08-04 09:17:13,048 INFO L140 encePairwiseOnDemand]: 359/362 looper letters, 46 selfloop transitions, 2 changer transitions 1/55 dead transitions. [2023-08-04 09:17:13,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 55 transitions, 252 flow [2023-08-04 09:17:13,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:17:13,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:17:13,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 533 transitions. [2023-08-04 09:17:13,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49079189686924496 [2023-08-04 09:17:13,059 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 533 transitions. [2023-08-04 09:17:13,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 533 transitions. [2023-08-04 09:17:13,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:17:13,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 533 transitions. [2023-08-04 09:17:13,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 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 09:17:13,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 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 09:17:13,064 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 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 09:17:13,064 INFO L175 Difference]: Start difference. First operand has 48 places, 48 transitions, 140 flow. Second operand 3 states and 533 transitions. [2023-08-04 09:17:13,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 55 transitions, 252 flow [2023-08-04 09:17:13,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 55 transitions, 236 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-04 09:17:13,069 INFO L231 Difference]: Finished difference. Result has 43 places, 48 transitions, 132 flow [2023-08-04 09:17:13,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=43, PETRI_TRANSITIONS=48} [2023-08-04 09:17:13,071 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -3 predicate places. [2023-08-04 09:17:13,071 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 48 transitions, 132 flow [2023-08-04 09:17:13,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 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 09:17:13,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:17:13,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:17:13,084 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 09:17:13,278 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 09:17:13,279 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:17:13,280 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:17:13,280 INFO L85 PathProgramCache]: Analyzing trace with hash -714383554, now seen corresponding path program 1 times [2023-08-04 09:17:13,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:17:13,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326992802] [2023-08-04 09:17:13,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:17:13,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:17:13,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:17:13,398 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 09:17:13,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:17:13,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326992802] [2023-08-04 09:17:13,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326992802] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:17:13,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423165875] [2023-08-04 09:17:13,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:17:13,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:17:13,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:17:13,404 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 09:17:13,412 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 09:17:13,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:17:13,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:17:13,489 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:17:13,496 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 09:17:13,496 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:17:13,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423165875] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:17:13,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:17:13,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:17:13,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083695772] [2023-08-04 09:17:13,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:17:13,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:17:13,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:17:13,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:17:13,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:17:13,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 362 [2023-08-04 09:17:13,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 48 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 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 09:17:13,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:17:13,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 362 [2023-08-04 09:17:13,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:17:13,930 INFO L124 PetriNetUnfolderBase]: 3990/5526 cut-off events. [2023-08-04 09:17:13,930 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2023-08-04 09:17:13,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11153 conditions, 5526 events. 3990/5526 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 27413 event pairs, 1700 based on Foata normal form. 0/3536 useless extension candidates. Maximal degree in co-relation 4884. Up to 5027 conditions per place. [2023-08-04 09:17:13,963 INFO L140 encePairwiseOnDemand]: 359/362 looper letters, 49 selfloop transitions, 2 changer transitions 1/58 dead transitions. [2023-08-04 09:17:13,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 58 transitions, 256 flow [2023-08-04 09:17:13,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:17:13,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:17:13,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 536 transitions. [2023-08-04 09:17:13,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49355432780847147 [2023-08-04 09:17:13,966 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 536 transitions. [2023-08-04 09:17:13,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 536 transitions. [2023-08-04 09:17:13,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:17:13,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 536 transitions. [2023-08-04 09:17:13,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 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 09:17:13,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 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 09:17:13,970 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 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 09:17:13,970 INFO L175 Difference]: Start difference. First operand has 43 places, 48 transitions, 132 flow. Second operand 3 states and 536 transitions. [2023-08-04 09:17:13,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 58 transitions, 256 flow [2023-08-04 09:17:13,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 58 transitions, 252 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:17:13,972 INFO L231 Difference]: Finished difference. Result has 44 places, 48 transitions, 136 flow [2023-08-04 09:17:13,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=44, PETRI_TRANSITIONS=48} [2023-08-04 09:17:13,973 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -2 predicate places. [2023-08-04 09:17:13,974 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 48 transitions, 136 flow [2023-08-04 09:17:13,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 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 09:17:13,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:17:13,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:17:13,983 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 09:17:14,180 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 09:17:14,180 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:17:14,181 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:17:14,181 INFO L85 PathProgramCache]: Analyzing trace with hash 240565614, now seen corresponding path program 1 times [2023-08-04 09:17:14,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:17:14,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262634631] [2023-08-04 09:17:14,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:17:14,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:17:14,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:17:14,265 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 09:17:14,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:17:14,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262634631] [2023-08-04 09:17:14,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262634631] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:17:14,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110331618] [2023-08-04 09:17:14,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:17:14,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:17:14,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:17:14,268 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 09:17:14,271 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 09:17:14,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:17:14,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:17:14,352 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:17:14,359 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 09:17:14,359 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:17:14,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110331618] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:17:14,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:17:14,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:17:14,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992247616] [2023-08-04 09:17:14,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:17:14,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:17:14,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:17:14,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:17:14,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:17:14,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 362 [2023-08-04 09:17:14,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 48 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 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 09:17:14,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:17:14,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 362 [2023-08-04 09:17:14,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:17:14,688 INFO L124 PetriNetUnfolderBase]: 2454/3478 cut-off events. [2023-08-04 09:17:14,691 INFO L125 PetriNetUnfolderBase]: For 87/87 co-relation queries the response was YES. [2023-08-04 09:17:14,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7218 conditions, 3478 events. 2454/3478 cut-off events. For 87/87 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 15891 event pairs, 1051 based on Foata normal form. 0/2320 useless extension candidates. Maximal degree in co-relation 2998. Up to 2595 conditions per place. [2023-08-04 09:17:14,713 INFO L140 encePairwiseOnDemand]: 359/362 looper letters, 54 selfloop transitions, 2 changer transitions 0/62 dead transitions. [2023-08-04 09:17:14,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 62 transitions, 282 flow [2023-08-04 09:17:14,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:17:14,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:17:14,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 540 transitions. [2023-08-04 09:17:14,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4972375690607735 [2023-08-04 09:17:14,715 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 540 transitions. [2023-08-04 09:17:14,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 540 transitions. [2023-08-04 09:17:14,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:17:14,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 540 transitions. [2023-08-04 09:17:14,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 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 09:17:14,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 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 09:17:14,720 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 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 09:17:14,720 INFO L175 Difference]: Start difference. First operand has 44 places, 48 transitions, 136 flow. Second operand 3 states and 540 transitions. [2023-08-04 09:17:14,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 62 transitions, 282 flow [2023-08-04 09:17:14,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 62 transitions, 278 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:17:14,725 INFO L231 Difference]: Finished difference. Result has 45 places, 49 transitions, 144 flow [2023-08-04 09:17:14,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=45, PETRI_TRANSITIONS=49} [2023-08-04 09:17:14,726 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -1 predicate places. [2023-08-04 09:17:14,726 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 49 transitions, 144 flow [2023-08-04 09:17:14,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 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 09:17:14,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:17:14,727 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] [2023-08-04 09:17:14,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 09:17:14,937 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 09:17:14,937 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:17:14,938 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:17:14,938 INFO L85 PathProgramCache]: Analyzing trace with hash -52619336, now seen corresponding path program 1 times [2023-08-04 09:17:14,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:17:14,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666025773] [2023-08-04 09:17:14,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:17:14,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:17:14,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:17:15,006 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 09:17:15,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:17:15,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666025773] [2023-08-04 09:17:15,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666025773] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:17:15,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324884500] [2023-08-04 09:17:15,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:17:15,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:17:15,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:17:15,012 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 09:17:15,021 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 09:17:15,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:17:15,108 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:17:15,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:17:15,126 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 09:17:15,126 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:17:15,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324884500] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:17:15,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:17:15,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:17:15,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690760866] [2023-08-04 09:17:15,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:17:15,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:17:15,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:17:15,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:17:15,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:17:15,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 362 [2023-08-04 09:17:15,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 49 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 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 09:17:15,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:17:15,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 362 [2023-08-04 09:17:15,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:17:15,451 INFO L124 PetriNetUnfolderBase]: 2075/2959 cut-off events. [2023-08-04 09:17:15,451 INFO L125 PetriNetUnfolderBase]: For 220/220 co-relation queries the response was YES. [2023-08-04 09:17:15,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6341 conditions, 2959 events. 2075/2959 cut-off events. For 220/220 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 13085 event pairs, 1046 based on Foata normal form. 0/2096 useless extension candidates. Maximal degree in co-relation 2682. Up to 2429 conditions per place. [2023-08-04 09:17:15,461 INFO L140 encePairwiseOnDemand]: 359/362 looper letters, 55 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2023-08-04 09:17:15,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 63 transitions, 292 flow [2023-08-04 09:17:15,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:17:15,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:17:15,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 540 transitions. [2023-08-04 09:17:15,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4972375690607735 [2023-08-04 09:17:15,464 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 540 transitions. [2023-08-04 09:17:15,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 540 transitions. [2023-08-04 09:17:15,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:17:15,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 540 transitions. [2023-08-04 09:17:15,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 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 09:17:15,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 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 09:17:15,468 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 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 09:17:15,468 INFO L175 Difference]: Start difference. First operand has 45 places, 49 transitions, 144 flow. Second operand 3 states and 540 transitions. [2023-08-04 09:17:15,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 63 transitions, 292 flow [2023-08-04 09:17:15,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 63 transitions, 290 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:17:15,473 INFO L231 Difference]: Finished difference. Result has 47 places, 50 transitions, 154 flow [2023-08-04 09:17:15,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=47, PETRI_TRANSITIONS=50} [2023-08-04 09:17:15,475 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 1 predicate places. [2023-08-04 09:17:15,475 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 50 transitions, 154 flow [2023-08-04 09:17:15,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 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 09:17:15,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:17:15,475 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] [2023-08-04 09:17:15,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 09:17:15,681 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 09:17:15,681 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:17:15,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:17:15,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1770212141, now seen corresponding path program 1 times [2023-08-04 09:17:15,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:17:15,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313768162] [2023-08-04 09:17:15,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:17:15,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:17:15,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:17:15,762 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 09:17:15,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:17:15,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313768162] [2023-08-04 09:17:15,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313768162] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:17:15,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881177024] [2023-08-04 09:17:15,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:17:15,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:17:15,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:17:15,764 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 09:17:15,780 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 09:17:15,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:17:15,855 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:17:15,856 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:17:15,867 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 09:17:15,867 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:17:15,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881177024] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:17:15,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:17:15,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:17:15,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134312620] [2023-08-04 09:17:15,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:17:15,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:17:15,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:17:15,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:17:15,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:17:15,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 362 [2023-08-04 09:17:15,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 50 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 169.33333333333334) internal successors, (508), 3 states have internal predecessors, (508), 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 09:17:15,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:17:15,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 362 [2023-08-04 09:17:15,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:17:16,137 INFO L124 PetriNetUnfolderBase]: 2059/2933 cut-off events. [2023-08-04 09:17:16,137 INFO L125 PetriNetUnfolderBase]: For 199/199 co-relation queries the response was YES. [2023-08-04 09:17:16,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6343 conditions, 2933 events. 2059/2933 cut-off events. For 199/199 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12937 event pairs, 1191 based on Foata normal form. 0/2101 useless extension candidates. Maximal degree in co-relation 5010. Up to 2778 conditions per place. [2023-08-04 09:17:16,150 INFO L140 encePairwiseOnDemand]: 359/362 looper letters, 49 selfloop transitions, 2 changer transitions 3/60 dead transitions. [2023-08-04 09:17:16,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 60 transitions, 282 flow [2023-08-04 09:17:16,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:17:16,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:17:16,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 536 transitions. [2023-08-04 09:17:16,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49355432780847147 [2023-08-04 09:17:16,152 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 536 transitions. [2023-08-04 09:17:16,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 536 transitions. [2023-08-04 09:17:16,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:17:16,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 536 transitions. [2023-08-04 09:17:16,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 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 09:17:16,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 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 09:17:16,156 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 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 09:17:16,156 INFO L175 Difference]: Start difference. First operand has 47 places, 50 transitions, 154 flow. Second operand 3 states and 536 transitions. [2023-08-04 09:17:16,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 60 transitions, 282 flow [2023-08-04 09:17:16,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 60 transitions, 280 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:17:16,165 INFO L231 Difference]: Finished difference. Result has 49 places, 48 transitions, 152 flow [2023-08-04 09:17:16,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=49, PETRI_TRANSITIONS=48} [2023-08-04 09:17:16,166 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 3 predicate places. [2023-08-04 09:17:16,166 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 48 transitions, 152 flow [2023-08-04 09:17:16,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.33333333333334) internal successors, (508), 3 states have internal predecessors, (508), 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 09:17:16,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:17:16,166 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] [2023-08-04 09:17:16,177 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 09:17:16,377 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 09:17:16,377 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:17:16,378 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:17:16,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1161571257, now seen corresponding path program 1 times [2023-08-04 09:17:16,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:17:16,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718866121] [2023-08-04 09:17:16,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:17:16,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:17:16,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:17:16,449 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 09:17:16,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:17:16,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718866121] [2023-08-04 09:17:16,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718866121] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:17:16,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265889012] [2023-08-04 09:17:16,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:17:16,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:17:16,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:17:16,452 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 09:17:16,482 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 09:17:16,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:17:16,559 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:17:16,560 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:17:16,602 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 09:17:16,603 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:17:16,630 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 09:17:16,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265889012] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:17:16,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:17:16,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:17:16,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351167307] [2023-08-04 09:17:16,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:17:16,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:17:16,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:17:16,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:17:16,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:17:16,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 362 [2023-08-04 09:17:16,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 48 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 166.8) internal successors, (834), 5 states have internal predecessors, (834), 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 09:17:16,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:17:16,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 362 [2023-08-04 09:17:16,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:17:16,673 INFO L124 PetriNetUnfolderBase]: 11/26 cut-off events. [2023-08-04 09:17:16,673 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 09:17:16,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67 conditions, 26 events. 11/26 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 38 event pairs, 1 based on Foata normal form. 4/25 useless extension candidates. Maximal degree in co-relation 55. Up to 17 conditions per place. [2023-08-04 09:17:16,673 INFO L140 encePairwiseOnDemand]: 359/362 looper letters, 0 selfloop transitions, 0 changer transitions 14/14 dead transitions. [2023-08-04 09:17:16,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 14 transitions, 58 flow [2023-08-04 09:17:16,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:17:16,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:17:16,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 654 transitions. [2023-08-04 09:17:16,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4516574585635359 [2023-08-04 09:17:16,677 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 654 transitions. [2023-08-04 09:17:16,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 654 transitions. [2023-08-04 09:17:16,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:17:16,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 654 transitions. [2023-08-04 09:17:16,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 163.5) internal successors, (654), 4 states have internal predecessors, (654), 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 09:17:16,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 362.0) internal successors, (1810), 5 states have internal predecessors, (1810), 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 09:17:16,683 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 362.0) internal successors, (1810), 5 states have internal predecessors, (1810), 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 09:17:16,683 INFO L175 Difference]: Start difference. First operand has 49 places, 48 transitions, 152 flow. Second operand 4 states and 654 transitions. [2023-08-04 09:17:16,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 14 transitions, 58 flow [2023-08-04 09:17:16,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 14 transitions, 56 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:17:16,684 INFO L231 Difference]: Finished difference. Result has 21 places, 0 transitions, 0 flow [2023-08-04 09:17:16,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=22, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=21, PETRI_TRANSITIONS=0} [2023-08-04 09:17:16,684 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -25 predicate places. [2023-08-04 09:17:16,684 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 0 transitions, 0 flow [2023-08-04 09:17:16,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 166.8) internal successors, (834), 5 states have internal predecessors, (834), 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 09:17:16,688 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 09:17:16,696 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 09:17:16,896 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 09:17:16,896 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:17:16,898 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 09:17:16,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 195 transitions, 432 flow [2023-08-04 09:17:16,946 INFO L124 PetriNetUnfolderBase]: 101/667 cut-off events. [2023-08-04 09:17:16,946 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:17:16,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 728 conditions, 667 events. 101/667 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3319 event pairs, 0 based on Foata normal form. 0/556 useless extension candidates. Maximal degree in co-relation 388. Up to 16 conditions per place. [2023-08-04 09:17:16,949 INFO L82 GeneralOperation]: Start removeDead. Operand has 175 places, 195 transitions, 432 flow [2023-08-04 09:17:16,951 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 175 places, 195 transitions, 432 flow [2023-08-04 09:17:16,951 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:17:16,951 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 175 places, 195 transitions, 432 flow [2023-08-04 09:17:16,951 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 175 places, 195 transitions, 432 flow [2023-08-04 09:17:16,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 195 transitions, 432 flow [2023-08-04 09:17:16,993 INFO L124 PetriNetUnfolderBase]: 101/667 cut-off events. [2023-08-04 09:17:16,993 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:17:16,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 728 conditions, 667 events. 101/667 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3319 event pairs, 0 based on Foata normal form. 0/556 useless extension candidates. Maximal degree in co-relation 388. Up to 16 conditions per place. [2023-08-04 09:17:17,002 INFO L119 LiptonReduction]: Number of co-enabled transitions 5808 [2023-08-04 09:17:21,656 INFO L134 LiptonReduction]: Checked pairs total: 11085 [2023-08-04 09:17:21,656 INFO L136 LiptonReduction]: Total number of compositions: 168 [2023-08-04 09:17:21,657 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 09:17:21,658 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;@58ef4216, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:17:21,658 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 09:17:21,661 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:17:21,661 INFO L124 PetriNetUnfolderBase]: 3/34 cut-off events. [2023-08-04 09:17:21,661 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:17:21,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:17:21,661 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-04 09:17:21,661 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 09:17:21,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:17:21,661 INFO L85 PathProgramCache]: Analyzing trace with hash -789167256, now seen corresponding path program 1 times [2023-08-04 09:17:21,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:17:21,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117028132] [2023-08-04 09:17:21,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:17:21,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:17:21,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:17:21,687 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 09:17:21,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:17:21,731 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 09:17:21,731 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 09:17:21,731 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 09:17:21,731 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 09:17:21,731 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 09:17:21,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 09:17:21,732 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 09:17:21,732 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 09:17:21,733 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 09:17:21,733 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 09:17:21,773 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 09:17:21,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 211 places, 240 transitions, 570 flow [2023-08-04 09:17:22,214 INFO L124 PetriNetUnfolderBase]: 891/4175 cut-off events. [2023-08-04 09:17:22,215 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 09:17:22,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4849 conditions, 4175 events. 891/4175 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 33430 event pairs, 22 based on Foata normal form. 0/3528 useless extension candidates. Maximal degree in co-relation 2468. Up to 192 conditions per place. [2023-08-04 09:17:22,249 INFO L82 GeneralOperation]: Start removeDead. Operand has 211 places, 240 transitions, 570 flow [2023-08-04 09:17:22,267 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 211 places, 240 transitions, 570 flow [2023-08-04 09:17:22,267 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:17:22,267 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 211 places, 240 transitions, 570 flow [2023-08-04 09:17:22,268 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 211 places, 240 transitions, 570 flow [2023-08-04 09:17:22,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 211 places, 240 transitions, 570 flow [2023-08-04 09:17:22,669 INFO L124 PetriNetUnfolderBase]: 891/4175 cut-off events. [2023-08-04 09:17:22,669 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 09:17:22,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4849 conditions, 4175 events. 891/4175 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 33430 event pairs, 22 based on Foata normal form. 0/3528 useless extension candidates. Maximal degree in co-relation 2468. Up to 192 conditions per place. [2023-08-04 09:17:22,795 INFO L119 LiptonReduction]: Number of co-enabled transitions 15180 [2023-08-04 09:17:27,666 INFO L134 LiptonReduction]: Checked pairs total: 34979 [2023-08-04 09:17:27,666 INFO L136 LiptonReduction]: Total number of compositions: 188 [2023-08-04 09:17:27,668 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:17:27,668 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;@58ef4216, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:17:27,668 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:17:27,671 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:17:27,671 INFO L124 PetriNetUnfolderBase]: 3/33 cut-off events. [2023-08-04 09:17:27,671 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 09:17:27,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:17:27,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:17:27,673 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:17:27,673 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:17:27,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1526920129, now seen corresponding path program 1 times [2023-08-04 09:17:27,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:17:27,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348681149] [2023-08-04 09:17:27,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:17:27,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:17:27,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:17:27,707 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 09:17:27,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:17:27,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348681149] [2023-08-04 09:17:27,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348681149] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:17:27,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:17:27,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:17:27,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651487748] [2023-08-04 09:17:27,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:17:27,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:17:27,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:17:27,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:17:27,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:17:27,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 428 [2023-08-04 09:17:27,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 79 transitions, 248 flow. Second operand has 3 states, 3 states have (on average 190.66666666666666) internal successors, (572), 3 states have internal predecessors, (572), 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 09:17:27,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:17:27,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 428 [2023-08-04 09:17:27,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:18:55,342 INFO L124 PetriNetUnfolderBase]: 1058051/1258840 cut-off events. [2023-08-04 09:18:55,342 INFO L125 PetriNetUnfolderBase]: For 125241/125241 co-relation queries the response was YES. [2023-08-04 09:18:59,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2551270 conditions, 1258840 events. 1058051/1258840 cut-off events. For 125241/125241 co-relation queries the response was YES. Maximal size of possible extension queue 24574. Compared 6749009 event pairs, 534125 based on Foata normal form. 0/796821 useless extension candidates. Maximal degree in co-relation 925146. Up to 1228387 conditions per place. [2023-08-04 09:19:06,439 INFO L140 encePairwiseOnDemand]: 424/428 looper letters, 66 selfloop transitions, 2 changer transitions 3/83 dead transitions. [2023-08-04 09:19:06,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 83 transitions, 392 flow [2023-08-04 09:19:06,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:19:06,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:19:06,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 634 transitions. [2023-08-04 09:19:06,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4937694704049844 [2023-08-04 09:19:06,447 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 634 transitions. [2023-08-04 09:19:06,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 634 transitions. [2023-08-04 09:19:06,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:19:06,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 634 transitions. [2023-08-04 09:19:06,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 211.33333333333334) internal successors, (634), 3 states have internal predecessors, (634), 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 09:19:06,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 428.0) internal successors, (1712), 4 states have internal predecessors, (1712), 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 09:19:06,460 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 428.0) internal successors, (1712), 4 states have internal predecessors, (1712), 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 09:19:06,460 INFO L175 Difference]: Start difference. First operand has 67 places, 79 transitions, 248 flow. Second operand 3 states and 634 transitions. [2023-08-04 09:19:06,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 83 transitions, 392 flow [2023-08-04 09:19:06,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 83 transitions, 392 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:19:06,638 INFO L231 Difference]: Finished difference. Result has 69 places, 76 transitions, 240 flow [2023-08-04 09:19:06,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=428, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=240, PETRI_PLACES=69, PETRI_TRANSITIONS=76} [2023-08-04 09:19:06,640 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 2 predicate places. [2023-08-04 09:19:06,640 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 76 transitions, 240 flow [2023-08-04 09:19:06,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 190.66666666666666) internal successors, (572), 3 states have internal predecessors, (572), 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 09:19:06,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:19:06,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:19:06,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 09:19:06,641 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:19:06,641 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:19:06,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1459230437, now seen corresponding path program 1 times [2023-08-04 09:19:06,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:19:06,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485526262] [2023-08-04 09:19:06,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:19:06,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:19:06,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:19:06,702 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 09:19:06,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:19:06,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485526262] [2023-08-04 09:19:06,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485526262] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:19:06,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797570884] [2023-08-04 09:19:06,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:19:06,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:19:06,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:19:06,706 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 09:19:06,707 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 09:19:06,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:19:06,814 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:19:06,815 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:19:06,821 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 09:19:06,821 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:19:06,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797570884] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:19:06,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:19:06,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:19:06,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81429964] [2023-08-04 09:19:06,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:19:06,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:19:06,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:19:06,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:19:06,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:19:06,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 428 [2023-08-04 09:19:06,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 76 transitions, 240 flow. Second operand has 3 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 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 09:19:06,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:19:06,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 428 [2023-08-04 09:19:06,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:20:44,520 INFO L124 PetriNetUnfolderBase]: 1045421/1242392 cut-off events. [2023-08-04 09:20:44,521 INFO L125 PetriNetUnfolderBase]: For 115861/115861 co-relation queries the response was YES. [2023-08-04 09:20:49,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2518226 conditions, 1242392 events. 1045421/1242392 cut-off events. For 115861/115861 co-relation queries the response was YES. Maximal size of possible extension queue 24647. Compared 6686707 event pairs, 528586 based on Foata normal form. 0/785769 useless extension candidates. Maximal degree in co-relation 2518184. Up to 1213297 conditions per place. [2023-08-04 09:20:56,029 INFO L140 encePairwiseOnDemand]: 425/428 looper letters, 73 selfloop transitions, 2 changer transitions 0/87 dead transitions. [2023-08-04 09:20:56,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 87 transitions, 412 flow [2023-08-04 09:20:56,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:20:56,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:20:56,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 639 transitions. [2023-08-04 09:20:56,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4976635514018692 [2023-08-04 09:20:56,032 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 639 transitions. [2023-08-04 09:20:56,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 639 transitions. [2023-08-04 09:20:56,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:20:56,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 639 transitions. [2023-08-04 09:20:56,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 213.0) internal successors, (639), 3 states have internal predecessors, (639), 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 09:20:56,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 428.0) internal successors, (1712), 4 states have internal predecessors, (1712), 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 09:20:56,036 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 428.0) internal successors, (1712), 4 states have internal predecessors, (1712), 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 09:20:56,036 INFO L175 Difference]: Start difference. First operand has 69 places, 76 transitions, 240 flow. Second operand 3 states and 639 transitions. [2023-08-04 09:20:56,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 87 transitions, 412 flow [2023-08-04 09:20:56,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 87 transitions, 398 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 09:20:56,545 INFO L231 Difference]: Finished difference. Result has 65 places, 77 transitions, 238 flow [2023-08-04 09:20:56,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=428, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=238, PETRI_PLACES=65, PETRI_TRANSITIONS=77} [2023-08-04 09:20:56,546 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -2 predicate places. [2023-08-04 09:20:56,546 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 77 transitions, 238 flow [2023-08-04 09:20:56,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 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 09:20:56,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:20:56,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:20:56,551 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 09:20:56,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:20:56,751 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:20:56,751 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:20:56,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1205057402, now seen corresponding path program 1 times [2023-08-04 09:20:56,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:20:56,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130907027] [2023-08-04 09:20:56,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:20:56,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:20:56,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:20:56,829 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 09:20:56,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:20:56,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130907027] [2023-08-04 09:20:56,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130907027] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:20:56,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394148832] [2023-08-04 09:20:56,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:20:56,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:20:56,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:20:56,846 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 09:20:56,899 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 09:20:56,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:20:56,987 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:20:56,988 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:20:56,994 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 09:20:56,994 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:20:56,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394148832] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:20:56,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:20:56,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:20:56,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465871466] [2023-08-04 09:20:56,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:20:56,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:20:56,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:20:56,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:20:56,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:20:57,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 428 [2023-08-04 09:20:57,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 77 transitions, 238 flow. Second operand has 3 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 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 09:20:57,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:20:57,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 428 [2023-08-04 09:20:57,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:22:29,940 INFO L124 PetriNetUnfolderBase]: 1046787/1251607 cut-off events. [2023-08-04 09:22:29,940 INFO L125 PetriNetUnfolderBase]: For 65745/65745 co-relation queries the response was YES. [2023-08-04 09:22:34,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2528077 conditions, 1251607 events. 1046787/1251607 cut-off events. For 65745/65745 co-relation queries the response was YES. Maximal size of possible extension queue 26249. Compared 7002446 event pairs, 525820 based on Foata normal form. 0/793276 useless extension candidates. Maximal degree in co-relation 731809. Up to 1203760 conditions per place. [2023-08-04 09:22:40,954 INFO L140 encePairwiseOnDemand]: 425/428 looper letters, 80 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2023-08-04 09:22:40,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 94 transitions, 436 flow [2023-08-04 09:22:40,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:22:40,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:22:40,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 645 transitions. [2023-08-04 09:22:40,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5023364485981309 [2023-08-04 09:22:40,956 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 645 transitions. [2023-08-04 09:22:40,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 645 transitions. [2023-08-04 09:22:40,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:22:40,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 645 transitions. [2023-08-04 09:22:40,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 215.0) internal successors, (645), 3 states have internal predecessors, (645), 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 09:22:40,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 428.0) internal successors, (1712), 4 states have internal predecessors, (1712), 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 09:22:40,961 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 428.0) internal successors, (1712), 4 states have internal predecessors, (1712), 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 09:22:40,961 INFO L175 Difference]: Start difference. First operand has 65 places, 77 transitions, 238 flow. Second operand 3 states and 645 transitions. [2023-08-04 09:22:40,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 94 transitions, 436 flow [2023-08-04 09:22:41,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 94 transitions, 434 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:22:41,018 INFO L231 Difference]: Finished difference. Result has 67 places, 78 transitions, 248 flow [2023-08-04 09:22:41,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=428, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=248, PETRI_PLACES=67, PETRI_TRANSITIONS=78} [2023-08-04 09:22:41,019 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 0 predicate places. [2023-08-04 09:22:41,023 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 78 transitions, 248 flow [2023-08-04 09:22:41,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 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 09:22:41,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:22:41,024 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] [2023-08-04 09:22:41,030 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 09:22:41,231 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,SelfDestructingSolverStorable10 [2023-08-04 09:22:41,231 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:22:41,231 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:22:41,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1275430869, now seen corresponding path program 1 times [2023-08-04 09:22:41,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:22:41,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884095500] [2023-08-04 09:22:41,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:22:41,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:22:41,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:22:41,321 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 09:22:41,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:22:41,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884095500] [2023-08-04 09:22:41,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884095500] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:22:41,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069793731] [2023-08-04 09:22:41,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:22:41,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:22:41,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:22:41,333 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 09:22:41,369 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 09:22:41,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:22:41,467 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:22:41,468 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:22:41,473 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 09:22:41,475 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:22:41,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069793731] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:22:41,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:22:41,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:22:41,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150513020] [2023-08-04 09:22:41,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:22:41,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:22:41,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:22:41,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:22:41,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:22:41,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 428 [2023-08-04 09:22:41,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 78 transitions, 248 flow. Second operand has 3 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 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 09:22:41,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:22:41,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 428 [2023-08-04 09:22:41,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:24:01,118 INFO L124 PetriNetUnfolderBase]: 867451/1044228 cut-off events. [2023-08-04 09:24:01,119 INFO L125 PetriNetUnfolderBase]: For 42007/42007 co-relation queries the response was YES. [2023-08-04 09:24:04,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2128379 conditions, 1044228 events. 867451/1044228 cut-off events. For 42007/42007 co-relation queries the response was YES. Maximal size of possible extension queue 20881. Compared 5909754 event pairs, 397551 based on Foata normal form. 0/675358 useless extension candidates. Maximal degree in co-relation 667046. Up to 823384 conditions per place. [2023-08-04 09:24:08,172 INFO L140 encePairwiseOnDemand]: 425/428 looper letters, 90 selfloop transitions, 2 changer transitions 0/104 dead transitions. [2023-08-04 09:24:08,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 104 transitions, 499 flow [2023-08-04 09:24:08,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:24:08,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:24:08,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 654 transitions. [2023-08-04 09:24:08,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5093457943925234 [2023-08-04 09:24:08,174 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 654 transitions. [2023-08-04 09:24:08,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 654 transitions. [2023-08-04 09:24:08,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:24:08,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 654 transitions. [2023-08-04 09:24:08,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 218.0) internal successors, (654), 3 states have internal predecessors, (654), 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 09:24:08,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 428.0) internal successors, (1712), 4 states have internal predecessors, (1712), 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 09:24:08,177 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 428.0) internal successors, (1712), 4 states have internal predecessors, (1712), 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 09:24:08,177 INFO L175 Difference]: Start difference. First operand has 67 places, 78 transitions, 248 flow. Second operand 3 states and 654 transitions. [2023-08-04 09:24:08,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 104 transitions, 499 flow [2023-08-04 09:24:08,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 104 transitions, 497 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:24:08,212 INFO L231 Difference]: Finished difference. Result has 69 places, 79 transitions, 258 flow [2023-08-04 09:24:08,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=428, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=258, PETRI_PLACES=69, PETRI_TRANSITIONS=79} [2023-08-04 09:24:08,212 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 2 predicate places. [2023-08-04 09:24:08,213 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 79 transitions, 258 flow [2023-08-04 09:24:08,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 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 09:24:08,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:24:08,213 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] [2023-08-04 09:24:08,218 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 09:24:08,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:24:08,414 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:24:08,414 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:24:08,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1794297902, now seen corresponding path program 1 times [2023-08-04 09:24:08,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:24:08,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334416540] [2023-08-04 09:24:08,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:24:08,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:24:08,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:24:08,451 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 09:24:08,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:24:08,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334416540] [2023-08-04 09:24:08,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334416540] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:24:08,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607613402] [2023-08-04 09:24:08,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:24:08,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:24:08,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:24:08,453 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 09:24:08,474 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 09:24:08,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:24:08,551 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:24:08,553 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:24:08,558 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 09:24:08,558 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:24:08,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607613402] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:24:08,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:24:08,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:24:08,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136610331] [2023-08-04 09:24:08,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:24:08,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:24:08,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:24:08,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:24:08,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:24:08,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 428 [2023-08-04 09:24:08,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 79 transitions, 258 flow. Second operand has 3 states, 3 states have (on average 195.0) internal successors, (585), 3 states have internal predecessors, (585), 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 09:24:08,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:24:08,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 428 [2023-08-04 09:24:08,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:25:16,507 INFO L124 PetriNetUnfolderBase]: 779602/943227 cut-off events. [2023-08-04 09:25:16,508 INFO L125 PetriNetUnfolderBase]: For 95965/95965 co-relation queries the response was YES. [2023-08-04 09:25:19,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1970101 conditions, 943227 events. 779602/943227 cut-off events. For 95965/95965 co-relation queries the response was YES. Maximal size of possible extension queue 16775. Compared 5325450 event pairs, 363264 based on Foata normal form. 0/629158 useless extension candidates. Maximal degree in co-relation 647662. Up to 730304 conditions per place. [2023-08-04 09:25:23,152 INFO L140 encePairwiseOnDemand]: 425/428 looper letters, 91 selfloop transitions, 2 changer transitions 0/105 dead transitions. [2023-08-04 09:25:23,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 105 transitions, 511 flow [2023-08-04 09:25:23,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:25:23,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:25:23,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 654 transitions. [2023-08-04 09:25:23,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5093457943925234 [2023-08-04 09:25:23,155 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 654 transitions. [2023-08-04 09:25:23,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 654 transitions. [2023-08-04 09:25:23,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:25:23,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 654 transitions. [2023-08-04 09:25:23,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 218.0) internal successors, (654), 3 states have internal predecessors, (654), 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 09:25:23,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 428.0) internal successors, (1712), 4 states have internal predecessors, (1712), 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 09:25:23,159 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 428.0) internal successors, (1712), 4 states have internal predecessors, (1712), 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 09:25:23,159 INFO L175 Difference]: Start difference. First operand has 69 places, 79 transitions, 258 flow. Second operand 3 states and 654 transitions. [2023-08-04 09:25:23,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 105 transitions, 511 flow [2023-08-04 09:25:39,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 105 transitions, 509 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:25:39,066 INFO L231 Difference]: Finished difference. Result has 71 places, 80 transitions, 268 flow [2023-08-04 09:25:39,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=428, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=268, PETRI_PLACES=71, PETRI_TRANSITIONS=80} [2023-08-04 09:25:39,067 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 4 predicate places. [2023-08-04 09:25:39,067 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 80 transitions, 268 flow [2023-08-04 09:25:39,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 195.0) internal successors, (585), 3 states have internal predecessors, (585), 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 09:25:39,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:25:39,067 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 09:25:39,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-08-04 09:25:39,268 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,SelfDestructingSolverStorable12 [2023-08-04 09:25:39,268 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:25:39,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:25:39,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1573118958, now seen corresponding path program 1 times [2023-08-04 09:25:39,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:25:39,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926442679] [2023-08-04 09:25:39,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:25:39,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:25:39,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:25:39,323 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 09:25:39,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:25:39,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926442679] [2023-08-04 09:25:39,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926442679] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:25:39,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715744056] [2023-08-04 09:25:39,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:25:39,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:25:39,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:25:39,325 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 09:25:39,332 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 09:25:39,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:25:39,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:25:39,426 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:25:39,431 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 09:25:39,431 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:25:39,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715744056] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:25:39,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:25:39,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:25:39,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271605141] [2023-08-04 09:25:39,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:25:39,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:25:39,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:25:39,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:25:39,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:25:39,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 428 [2023-08-04 09:25:39,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 80 transitions, 268 flow. Second operand has 3 states, 3 states have (on average 196.33333333333334) internal successors, (589), 3 states have internal predecessors, (589), 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 09:25:39,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:25:39,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 428 [2023-08-04 09:25:39,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-08-04 09:26:31,157 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-04 09:26:31,172 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-04 09:26:32,164 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 09:26:32,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 [2023-08-04 09:26:33,587 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 09:26:33,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-04 09:26:33,588 WARN L619 AbstractCegarLoop]: Verification canceled: while executing Executor. [2023-08-04 09:26:33,588 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-08-04 09:26:33,588 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was TIMEOUT (1/2) [2023-08-04 09:26:33,589 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-04 09:26:33,589 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-04 09:26:33,592 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.08 09:26:33 BasicIcfg [2023-08-04 09:26:33,593 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-04 09:26:33,593 INFO L158 Benchmark]: Toolchain (without parser) took 568460.28ms. Allocated memory was 482.3MB in the beginning and 16.0GB in the end (delta: 15.5GB). Free memory was 434.3MB in the beginning and 11.1GB in the end (delta: -10.7GB). Peak memory consumption was 8.8GB. Max. memory is 16.0GB. [2023-08-04 09:26:33,593 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 325.1MB. Free memory was 273.3MB in the beginning and 273.1MB in the end (delta: 153.9kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 09:26:33,593 INFO L158 Benchmark]: CACSL2BoogieTranslator took 247.83ms. Allocated memory is still 482.3MB. Free memory was 434.3MB in the beginning and 422.2MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-04 09:26:33,594 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.99ms. Allocated memory is still 482.3MB. Free memory was 422.2MB in the beginning and 419.8MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 09:26:33,594 INFO L158 Benchmark]: Boogie Preprocessor took 29.70ms. Allocated memory is still 482.3MB. Free memory was 419.8MB in the beginning and 418.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 09:26:33,594 INFO L158 Benchmark]: RCFGBuilder took 736.34ms. Allocated memory is still 482.3MB. Free memory was 417.7MB in the beginning and 381.5MB in the end (delta: 36.1MB). Peak memory consumption was 35.7MB. Max. memory is 16.0GB. [2023-08-04 09:26:33,594 INFO L158 Benchmark]: TraceAbstraction took 567402.38ms. Allocated memory was 482.3MB in the beginning and 16.0GB in the end (delta: 15.5GB). Free memory was 380.9MB in the beginning and 11.1GB in the end (delta: -10.7GB). Peak memory consumption was 8.7GB. Max. memory is 16.0GB. [2023-08-04 09:26:33,595 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 325.1MB. Free memory was 273.3MB in the beginning and 273.1MB in the end (delta: 153.9kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 247.83ms. Allocated memory is still 482.3MB. Free memory was 434.3MB in the beginning and 422.2MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 35.99ms. Allocated memory is still 482.3MB. Free memory was 422.2MB in the beginning and 419.8MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 29.70ms. Allocated memory is still 482.3MB. Free memory was 419.8MB in the beginning and 418.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 736.34ms. Allocated memory is still 482.3MB. Free memory was 417.7MB in the beginning and 381.5MB in the end (delta: 36.1MB). Peak memory consumption was 35.7MB. Max. memory is 16.0GB. * TraceAbstraction took 567402.38ms. Allocated memory was 482.3MB in the beginning and 16.0GB in the end (delta: 15.5GB). Free memory was 380.9MB in the beginning and 11.1GB in the end (delta: -10.7GB). Peak memory consumption was 8.7GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.8s, 175 PlacesBefore, 46 PlacesAfterwards, 195 TransitionsBefore, 52 TransitionsAfterwards, 5808 CoEnabledTransitionPairs, 7 FixpointIterations, 60 TrivialSequentialCompositions, 64 ConcurrentSequentialCompositions, 10 TrivialYvCompositions, 19 ConcurrentYvCompositions, 14 ChoiceCompositions, 167 TotalNumberOfCompositions, 11200 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 9565, independent: 9467, independent conditional: 0, independent unconditional: 9467, dependent: 98, dependent conditional: 0, dependent unconditional: 98, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3056, independent: 3029, independent conditional: 0, independent unconditional: 3029, dependent: 27, dependent conditional: 0, dependent unconditional: 27, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 9565, independent: 6438, independent conditional: 0, independent unconditional: 6438, dependent: 71, dependent conditional: 0, dependent unconditional: 71, unknown: 3056, unknown conditional: 0, unknown unconditional: 3056] , Statistics on independence cache: Total cache size (in pairs): 299, Positive cache size: 293, Positive conditional cache size: 0, Positive unconditional cache size: 293, Negative cache size: 6, Negative conditional cache size: 0, Negative unconditional cache size: 6, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.7s, 175 PlacesBefore, 46 PlacesAfterwards, 195 TransitionsBefore, 52 TransitionsAfterwards, 5808 CoEnabledTransitionPairs, 7 FixpointIterations, 61 TrivialSequentialCompositions, 64 ConcurrentSequentialCompositions, 10 TrivialYvCompositions, 19 ConcurrentYvCompositions, 14 ChoiceCompositions, 168 TotalNumberOfCompositions, 11085 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 9860, independent: 9766, independent conditional: 0, independent unconditional: 9766, dependent: 94, dependent conditional: 0, dependent unconditional: 94, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3064, independent: 3040, independent conditional: 0, independent unconditional: 3040, dependent: 24, dependent conditional: 0, dependent unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 9860, independent: 6726, independent conditional: 0, independent unconditional: 6726, dependent: 70, dependent conditional: 0, dependent unconditional: 70, unknown: 3064, unknown conditional: 0, unknown unconditional: 3064] , Statistics on independence cache: Total cache size (in pairs): 302, Positive cache size: 294, Positive conditional cache size: 0, Positive unconditional cache size: 294, Negative cache size: 8, Negative conditional cache size: 0, Negative unconditional cache size: 8, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5.4s, 211 PlacesBefore, 67 PlacesAfterwards, 240 TransitionsBefore, 79 TransitionsAfterwards, 15180 CoEnabledTransitionPairs, 7 FixpointIterations, 60 TrivialSequentialCompositions, 75 ConcurrentSequentialCompositions, 11 TrivialYvCompositions, 25 ConcurrentYvCompositions, 17 ChoiceCompositions, 188 TotalNumberOfCompositions, 34979 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 31194, independent: 31041, independent conditional: 0, independent unconditional: 31041, dependent: 153, dependent conditional: 0, dependent unconditional: 153, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 7947, independent: 7914, independent conditional: 0, independent unconditional: 7914, dependent: 33, dependent conditional: 0, dependent unconditional: 33, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 31194, independent: 23127, independent conditional: 0, independent unconditional: 23127, dependent: 120, dependent conditional: 0, dependent unconditional: 120, unknown: 7947, unknown conditional: 0, unknown unconditional: 7947] , Statistics on independence cache: Total cache size (in pairs): 937, Positive cache size: 925, Positive conditional cache size: 0, Positive unconditional cache size: 925, Negative cache size: 12, Negative conditional cache size: 0, Negative unconditional cache size: 12, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 104]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 199 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 10.6s, OverallIterations: 7, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 2.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 182 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 102 mSDsluCounter, 24 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 18 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 623 IncrementalHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 18 mSolverCounterUnsat, 24 mSDtfsCounter, 623 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 184 GetRequests, 163 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=154occurred in iteration=5, InterpolantAutomatonStates: 22, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 266 NumberOfCodeBlocks, 266 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 287 ConstructedInterpolants, 0 QuantifiedInterpolants, 383 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1077 ConjunctsInSsa, 13 ConjunctsInUnsatCore, 14 InterpolantComputations, 6 PerfectInterpolantSequences, 40/48 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 2 thread instances CFG has 10 procedures, 229 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 551.8s, OverallIterations: 6, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 544.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 200 SdHoareTripleChecker+Valid, 1.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 132 mSDsluCounter, 18 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 16 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 873 IncrementalHoareTripleChecker+Invalid, 889 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 16 mSolverCounterUnsat, 18 mSDtfsCounter, 873 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 124 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=268occurred in iteration=5, InterpolantAutomatonStates: 15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 220 NumberOfCodeBlocks, 220 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 209 ConstructedInterpolants, 0 QuantifiedInterpolants, 279 SizeOfPredicates, 0 NumberOfNonLiveVariables, 873 ConjunctsInSsa, 10 ConjunctsInUnsatCore, 11 InterpolantComputations, 6 PerfectInterpolantSequences, 25/30 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 7 procedures, 199 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 4.8s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.8s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=146occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 7 NumberOfCodeBlocks, 7 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown