/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.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 09:19:38,150 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 09:19:38,232 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 09:19:38,238 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 09:19:38,238 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 09:19:38,239 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 09:19:38,239 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 09:19:38,268 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 09:19:38,269 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 09:19:38,273 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 09:19:38,274 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 09:19:38,274 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 09:19:38,274 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 09:19:38,276 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 09:19:38,276 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 09:19:38,276 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 09:19:38,276 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 09:19:38,276 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 09:19:38,277 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 09:19:38,277 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 09:19:38,277 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 09:19:38,277 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 09:19:38,278 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 09:19:38,278 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 09:19:38,278 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 09:19:38,278 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 09:19:38,278 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 09:19:38,279 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 09:19:38,279 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 09:19:38,279 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 09:19:38,280 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:19:38,280 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 09:19:38,280 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 09:19:38,281 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 09:19:38,281 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 09:19:38,281 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 09:19:38,281 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 09:19:38,281 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 09:19:38,281 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 09:19:38,281 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 09:19:38,282 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 09:19:38,282 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 09:19:38,511 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 09:19:38,529 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 09:19:38,531 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 09:19:38,532 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 09:19:38,533 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 09:19:38,534 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-array-sum.wvr_bound2.c [2023-08-04 09:19:39,662 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 09:19:39,847 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 09:19:39,847 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-array-sum.wvr_bound2.c [2023-08-04 09:19:39,854 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23766252b/4de21293aa664b6f8eea932887a5dc54/FLAGf143155e4 [2023-08-04 09:19:39,866 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23766252b/4de21293aa664b6f8eea932887a5dc54 [2023-08-04 09:19:39,868 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 09:19:39,869 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 09:19:39,871 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 09:19:39,871 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 09:19:39,877 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 09:19:39,877 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:19:39" (1/1) ... [2023-08-04 09:19:39,878 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@579c9944 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:19:39, skipping insertion in model container [2023-08-04 09:19:39,878 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:19:39" (1/1) ... [2023-08-04 09:19:39,898 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 09:19:40,059 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.wvr_bound2.c[3078,3091] [2023-08-04 09:19:40,064 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:19:40,071 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 09:19:40,093 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.wvr_bound2.c[3078,3091] [2023-08-04 09:19:40,101 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:19:40,108 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:19:40,108 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:19:40,115 INFO L206 MainTranslator]: Completed translation [2023-08-04 09:19:40,116 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:19:40 WrapperNode [2023-08-04 09:19:40,116 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 09:19:40,118 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 09:19:40,118 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 09:19:40,118 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 09:19:40,124 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:19:40" (1/1) ... [2023-08-04 09:19:40,136 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:19:40" (1/1) ... [2023-08-04 09:19:40,167 INFO L138 Inliner]: procedures = 25, calls = 58, calls flagged for inlining = 16, calls inlined = 28, statements flattened = 332 [2023-08-04 09:19:40,168 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 09:19:40,168 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 09:19:40,169 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 09:19:40,169 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 09:19:40,177 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:19:40" (1/1) ... [2023-08-04 09:19:40,177 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:19:40" (1/1) ... [2023-08-04 09:19:40,181 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:19:40" (1/1) ... [2023-08-04 09:19:40,182 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:19:40" (1/1) ... [2023-08-04 09:19:40,190 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:19:40" (1/1) ... [2023-08-04 09:19:40,195 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:19:40" (1/1) ... [2023-08-04 09:19:40,198 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:19:40" (1/1) ... [2023-08-04 09:19:40,199 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:19:40" (1/1) ... [2023-08-04 09:19:40,203 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 09:19:40,203 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 09:19:40,204 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 09:19:40,204 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 09:19:40,204 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:19:40" (1/1) ... [2023-08-04 09:19:40,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:19:40,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:19:40,238 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 09:19:40,257 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 09:19:40,277 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 09:19:40,278 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 09:19:40,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 09:19:40,278 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 09:19:40,279 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 09:19:40,279 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 09:19:40,279 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 09:19:40,279 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 09:19:40,279 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 09:19:40,281 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 09:19:40,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 09:19:40,282 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 09:19:40,282 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 09:19:40,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 09:19:40,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 09:19:40,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 09:19:40,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 09:19:40,284 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 09:19:40,396 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 09:19:40,398 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 09:19:40,827 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 09:19:41,077 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 09:19:41,077 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-08-04 09:19:41,080 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:19:41 BoogieIcfgContainer [2023-08-04 09:19:41,080 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 09:19:41,085 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 09:19:41,085 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 09:19:41,088 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 09:19:41,089 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 09:19:39" (1/3) ... [2023-08-04 09:19:41,090 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45b3d9be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:19:41, skipping insertion in model container [2023-08-04 09:19:41,090 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:19:40" (2/3) ... [2023-08-04 09:19:41,091 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45b3d9be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:19:41, skipping insertion in model container [2023-08-04 09:19:41,091 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:19:41" (3/3) ... [2023-08-04 09:19:41,092 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-more-array-sum.wvr_bound2.c [2023-08-04 09:19:41,099 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 09:19:41,108 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 09:19:41,108 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 09:19:41,108 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 09:19:41,193 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 09:19:41,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 207 places, 231 transitions, 504 flow [2023-08-04 09:19:41,436 INFO L124 PetriNetUnfolderBase]: 105/703 cut-off events. [2023-08-04 09:19:41,436 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:19:41,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 764 conditions, 703 events. 105/703 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3327 event pairs, 0 based on Foata normal form. 0/588 useless extension candidates. Maximal degree in co-relation 412. Up to 16 conditions per place. [2023-08-04 09:19:41,445 INFO L82 GeneralOperation]: Start removeDead. Operand has 207 places, 231 transitions, 504 flow [2023-08-04 09:19:41,451 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 207 places, 231 transitions, 504 flow [2023-08-04 09:19:41,454 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:19:41,462 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 207 places, 231 transitions, 504 flow [2023-08-04 09:19:41,464 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 207 places, 231 transitions, 504 flow [2023-08-04 09:19:41,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 207 places, 231 transitions, 504 flow [2023-08-04 09:19:41,535 INFO L124 PetriNetUnfolderBase]: 105/703 cut-off events. [2023-08-04 09:19:41,535 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:19:41,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 764 conditions, 703 events. 105/703 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3327 event pairs, 0 based on Foata normal form. 0/588 useless extension candidates. Maximal degree in co-relation 412. Up to 16 conditions per place. [2023-08-04 09:19:41,547 INFO L119 LiptonReduction]: Number of co-enabled transitions 5808 [2023-08-04 09:19:47,637 INFO L134 LiptonReduction]: Checked pairs total: 11121 [2023-08-04 09:19:47,637 INFO L136 LiptonReduction]: Total number of compositions: 212 [2023-08-04 09:19:47,648 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:19:47,654 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3640166c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:19:47,654 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:19:47,659 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:19:47,659 INFO L124 PetriNetUnfolderBase]: 4/38 cut-off events. [2023-08-04 09:19:47,660 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:19:47,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:19:47,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:19:47,661 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:19:47,665 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:19:47,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1998960521, now seen corresponding path program 1 times [2023-08-04 09:19:47,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:19:47,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971747254] [2023-08-04 09:19:47,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:19:47,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:19:47,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:19:47,931 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 09:19:47,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:19:47,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971747254] [2023-08-04 09:19:47,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971747254] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:19:47,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:19:47,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:19:47,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146670490] [2023-08-04 09:19:47,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:19:47,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:19:47,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:19:47,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:19:47,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:19:47,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 443 [2023-08-04 09:19:48,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 54 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 197.0) internal successors, (591), 3 states have internal predecessors, (591), 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 09:19:48,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:19:48,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 443 [2023-08-04 09:19:48,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:19:48,657 INFO L124 PetriNetUnfolderBase]: 4153/5804 cut-off events. [2023-08-04 09:19:48,657 INFO L125 PetriNetUnfolderBase]: For 322/322 co-relation queries the response was YES. [2023-08-04 09:19:48,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11689 conditions, 5804 events. 4153/5804 cut-off events. For 322/322 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 29398 event pairs, 1774 based on Foata normal form. 0/3687 useless extension candidates. Maximal degree in co-relation 9827. Up to 5537 conditions per place. [2023-08-04 09:19:48,690 INFO L140 encePairwiseOnDemand]: 439/443 looper letters, 45 selfloop transitions, 2 changer transitions 4/57 dead transitions. [2023-08-04 09:19:48,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 57 transitions, 252 flow [2023-08-04 09:19:48,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:19:48,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:19:48,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 632 transitions. [2023-08-04 09:19:48,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47554552294958613 [2023-08-04 09:19:48,706 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 632 transitions. [2023-08-04 09:19:48,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 632 transitions. [2023-08-04 09:19:48,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:19:48,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 632 transitions. [2023-08-04 09:19:48,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 210.66666666666666) internal successors, (632), 3 states have internal predecessors, (632), 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 09:19:48,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 443.0) internal successors, (1772), 4 states have internal predecessors, (1772), 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 09:19:48,721 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 443.0) internal successors, (1772), 4 states have internal predecessors, (1772), 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 09:19:48,723 INFO L175 Difference]: Start difference. First operand has 47 places, 54 transitions, 150 flow. Second operand 3 states and 632 transitions. [2023-08-04 09:19:48,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 57 transitions, 252 flow [2023-08-04 09:19:48,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 57 transitions, 252 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:19:48,729 INFO L231 Difference]: Finished difference. Result has 49 places, 50 transitions, 144 flow [2023-08-04 09:19:48,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=443, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=49, PETRI_TRANSITIONS=50} [2023-08-04 09:19:48,734 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 2 predicate places. [2023-08-04 09:19:48,734 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 50 transitions, 144 flow [2023-08-04 09:19:48,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 197.0) internal successors, (591), 3 states have internal predecessors, (591), 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 09:19:48,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:19:48,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:19:48,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 09:19:48,735 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:19:48,736 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:19:48,736 INFO L85 PathProgramCache]: Analyzing trace with hash -72090295, now seen corresponding path program 1 times [2023-08-04 09:19:48,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:19:48,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492938444] [2023-08-04 09:19:48,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:19:48,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:19:48,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:19:48,854 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 09:19:48,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:19:48,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492938444] [2023-08-04 09:19:48,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492938444] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:19:48,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445181916] [2023-08-04 09:19:48,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:19:48,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:19:48,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:19:48,863 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 09:19:48,884 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 09:19:48,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:19:48,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:19:48,968 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:19:48,980 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 09:19:48,981 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:19:48,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445181916] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:19:48,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:19:48,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:19:48,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186640738] [2023-08-04 09:19:48,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:19:48,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:19:48,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:19:48,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:19:48,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:19:48,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 443 [2023-08-04 09:19:48,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 50 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 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 09:19:48,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:19:48,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 443 [2023-08-04 09:19:48,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:19:49,523 INFO L124 PetriNetUnfolderBase]: 4007/5535 cut-off events. [2023-08-04 09:19:49,524 INFO L125 PetriNetUnfolderBase]: For 293/293 co-relation queries the response was YES. [2023-08-04 09:19:49,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11160 conditions, 5535 events. 4007/5535 cut-off events. For 293/293 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 27337 event pairs, 1740 based on Foata normal form. 0/3503 useless extension candidates. Maximal degree in co-relation 9301. Up to 5292 conditions per place. [2023-08-04 09:19:49,556 INFO L140 encePairwiseOnDemand]: 440/443 looper letters, 48 selfloop transitions, 2 changer transitions 1/57 dead transitions. [2023-08-04 09:19:49,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 57 transitions, 260 flow [2023-08-04 09:19:49,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:19:49,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:19:49,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 634 transitions. [2023-08-04 09:19:49,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47705041384499625 [2023-08-04 09:19:49,563 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 634 transitions. [2023-08-04 09:19:49,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 634 transitions. [2023-08-04 09:19:49,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:19:49,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 634 transitions. [2023-08-04 09:19:49,565 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 09:19:49,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 443.0) internal successors, (1772), 4 states have internal predecessors, (1772), 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 09:19:49,568 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 443.0) internal successors, (1772), 4 states have internal predecessors, (1772), 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 09:19:49,568 INFO L175 Difference]: Start difference. First operand has 49 places, 50 transitions, 144 flow. Second operand 3 states and 634 transitions. [2023-08-04 09:19:49,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 57 transitions, 260 flow [2023-08-04 09:19:49,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 57 transitions, 244 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-04 09:19:49,573 INFO L231 Difference]: Finished difference. Result has 44 places, 50 transitions, 136 flow [2023-08-04 09:19:49,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=443, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=41, 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=136, PETRI_PLACES=44, PETRI_TRANSITIONS=50} [2023-08-04 09:19:49,573 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -3 predicate places. [2023-08-04 09:19:49,574 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 50 transitions, 136 flow [2023-08-04 09:19:49,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 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 09:19:49,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:19:49,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:19:49,581 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 09:19:49,780 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 09:19:49,780 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:19:49,781 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:19:49,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1059335430, now seen corresponding path program 1 times [2023-08-04 09:19:49,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:19:49,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170250442] [2023-08-04 09:19:49,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:19:49,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:19:49,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:19:49,892 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 09:19:49,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:19:49,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170250442] [2023-08-04 09:19:49,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170250442] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:19:49,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799789968] [2023-08-04 09:19:49,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:19:49,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:19:49,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:19:49,901 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 09:19:49,905 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 09:19:49,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:19:49,991 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:19:49,994 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:19:50,006 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 09:19:50,007 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:19:50,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799789968] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:19:50,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:19:50,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:19:50,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543780052] [2023-08-04 09:19:50,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:19:50,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:19:50,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:19:50,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:19:50,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:19:50,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 443 [2023-08-04 09:19:50,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 50 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 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 09:19:50,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:19:50,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 443 [2023-08-04 09:19:50,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:19:50,519 INFO L124 PetriNetUnfolderBase]: 3991/5528 cut-off events. [2023-08-04 09:19:50,519 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2023-08-04 09:19:50,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11157 conditions, 5528 events. 3991/5528 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 27454 event pairs, 1700 based on Foata normal form. 0/3533 useless extension candidates. Maximal degree in co-relation 4884. Up to 5029 conditions per place. [2023-08-04 09:19:50,552 INFO L140 encePairwiseOnDemand]: 440/443 looper letters, 51 selfloop transitions, 2 changer transitions 1/60 dead transitions. [2023-08-04 09:19:50,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 60 transitions, 264 flow [2023-08-04 09:19:50,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:19:50,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:19:50,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 637 transitions. [2023-08-04 09:19:50,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47930775018811134 [2023-08-04 09:19:50,555 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 637 transitions. [2023-08-04 09:19:50,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 637 transitions. [2023-08-04 09:19:50,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:19:50,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 637 transitions. [2023-08-04 09:19:50,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 212.33333333333334) internal successors, (637), 3 states have internal predecessors, (637), 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 09:19:50,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 443.0) internal successors, (1772), 4 states have internal predecessors, (1772), 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 09:19:50,560 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 443.0) internal successors, (1772), 4 states have internal predecessors, (1772), 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 09:19:50,560 INFO L175 Difference]: Start difference. First operand has 44 places, 50 transitions, 136 flow. Second operand 3 states and 637 transitions. [2023-08-04 09:19:50,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 60 transitions, 264 flow [2023-08-04 09:19:50,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 60 transitions, 260 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:19:50,564 INFO L231 Difference]: Finished difference. Result has 45 places, 50 transitions, 140 flow [2023-08-04 09:19:50,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=443, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=42, 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=140, PETRI_PLACES=45, PETRI_TRANSITIONS=50} [2023-08-04 09:19:50,566 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -2 predicate places. [2023-08-04 09:19:50,566 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 50 transitions, 140 flow [2023-08-04 09:19:50,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 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 09:19:50,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:19:50,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:19:50,575 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 09:19:50,772 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 09:19:50,772 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:19:50,772 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:19:50,773 INFO L85 PathProgramCache]: Analyzing trace with hash -235439762, now seen corresponding path program 1 times [2023-08-04 09:19:50,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:19:50,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568888650] [2023-08-04 09:19:50,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:19:50,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:19:50,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:19:50,859 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 09:19:50,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:19:50,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568888650] [2023-08-04 09:19:50,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568888650] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:19:50,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386877085] [2023-08-04 09:19:50,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:19:50,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:19:50,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:19:50,862 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 09:19:50,880 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 09:19:50,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:19:50,950 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:19:50,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:19:50,962 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 09:19:50,962 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:19:50,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386877085] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:19:50,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:19:50,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:19:50,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966703474] [2023-08-04 09:19:50,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:19:50,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:19:50,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:19:50,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:19:50,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:19:50,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 443 [2023-08-04 09:19:50,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 50 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 200.0) internal successors, (600), 3 states have internal predecessors, (600), 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 09:19:50,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:19:50,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 443 [2023-08-04 09:19:50,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:19:51,341 INFO L124 PetriNetUnfolderBase]: 2455/3480 cut-off events. [2023-08-04 09:19:51,342 INFO L125 PetriNetUnfolderBase]: For 91/91 co-relation queries the response was YES. [2023-08-04 09:19:51,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7222 conditions, 3480 events. 2455/3480 cut-off events. For 91/91 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 15971 event pairs, 1051 based on Foata normal form. 0/2317 useless extension candidates. Maximal degree in co-relation 2998. Up to 2597 conditions per place. [2023-08-04 09:19:51,365 INFO L140 encePairwiseOnDemand]: 440/443 looper letters, 56 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2023-08-04 09:19:51,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 64 transitions, 290 flow [2023-08-04 09:19:51,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:19:51,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:19:51,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 641 transitions. [2023-08-04 09:19:51,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4823175319789315 [2023-08-04 09:19:51,368 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 641 transitions. [2023-08-04 09:19:51,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 641 transitions. [2023-08-04 09:19:51,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:19:51,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 641 transitions. [2023-08-04 09:19:51,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 213.66666666666666) internal successors, (641), 3 states have internal predecessors, (641), 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 09:19:51,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 443.0) internal successors, (1772), 4 states have internal predecessors, (1772), 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 09:19:51,373 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 443.0) internal successors, (1772), 4 states have internal predecessors, (1772), 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 09:19:51,373 INFO L175 Difference]: Start difference. First operand has 45 places, 50 transitions, 140 flow. Second operand 3 states and 641 transitions. [2023-08-04 09:19:51,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 64 transitions, 290 flow [2023-08-04 09:19:51,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 64 transitions, 286 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:19:51,378 INFO L231 Difference]: Finished difference. Result has 46 places, 51 transitions, 148 flow [2023-08-04 09:19:51,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=443, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=46, PETRI_TRANSITIONS=51} [2023-08-04 09:19:51,379 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -1 predicate places. [2023-08-04 09:19:51,379 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 51 transitions, 148 flow [2023-08-04 09:19:51,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 200.0) internal successors, (600), 3 states have internal predecessors, (600), 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 09:19:51,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:19:51,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:19:51,388 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 09:19:51,585 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 09:19:51,586 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:19:51,586 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:19:51,586 INFO L85 PathProgramCache]: Analyzing trace with hash 945022606, now seen corresponding path program 1 times [2023-08-04 09:19:51,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:19:51,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650447008] [2023-08-04 09:19:51,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:19:51,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:19:51,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:19:51,639 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 09:19:51,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:19:51,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650447008] [2023-08-04 09:19:51,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650447008] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:19:51,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294621961] [2023-08-04 09:19:51,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:19:51,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:19:51,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:19:51,641 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 09:19:51,663 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 09:19:51,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:19:51,738 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:19:51,740 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:19:51,754 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 09:19:51,755 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:19:51,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294621961] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:19:51,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:19:51,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:19:51,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723355031] [2023-08-04 09:19:51,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:19:51,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:19:51,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:19:51,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:19:51,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:19:51,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 443 [2023-08-04 09:19:51,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 51 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 201.33333333333334) internal successors, (604), 3 states have internal predecessors, (604), 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 09:19:51,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:19:51,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 443 [2023-08-04 09:19:51,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:19:52,069 INFO L124 PetriNetUnfolderBase]: 2076/2961 cut-off events. [2023-08-04 09:19:52,069 INFO L125 PetriNetUnfolderBase]: For 224/224 co-relation queries the response was YES. [2023-08-04 09:19:52,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6345 conditions, 2961 events. 2076/2961 cut-off events. For 224/224 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 13076 event pairs, 1046 based on Foata normal form. 0/2093 useless extension candidates. Maximal degree in co-relation 2682. Up to 2431 conditions per place. [2023-08-04 09:19:52,083 INFO L140 encePairwiseOnDemand]: 440/443 looper letters, 57 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2023-08-04 09:19:52,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 65 transitions, 300 flow [2023-08-04 09:19:52,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:19:52,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:19:52,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 641 transitions. [2023-08-04 09:19:52,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4823175319789315 [2023-08-04 09:19:52,086 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 641 transitions. [2023-08-04 09:19:52,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 641 transitions. [2023-08-04 09:19:52,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:19:52,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 641 transitions. [2023-08-04 09:19:52,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 213.66666666666666) internal successors, (641), 3 states have internal predecessors, (641), 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 09:19:52,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 443.0) internal successors, (1772), 4 states have internal predecessors, (1772), 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 09:19:52,091 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 443.0) internal successors, (1772), 4 states have internal predecessors, (1772), 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 09:19:52,091 INFO L175 Difference]: Start difference. First operand has 46 places, 51 transitions, 148 flow. Second operand 3 states and 641 transitions. [2023-08-04 09:19:52,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 65 transitions, 300 flow [2023-08-04 09:19:52,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 65 transitions, 298 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:19:52,097 INFO L231 Difference]: Finished difference. Result has 48 places, 52 transitions, 158 flow [2023-08-04 09:19:52,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=443, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=48, PETRI_TRANSITIONS=52} [2023-08-04 09:19:52,098 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 1 predicate places. [2023-08-04 09:19:52,098 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 52 transitions, 158 flow [2023-08-04 09:19:52,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 201.33333333333334) internal successors, (604), 3 states have internal predecessors, (604), 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 09:19:52,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:19:52,099 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] [2023-08-04 09:19:52,107 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 09:19:52,307 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 09:19:52,308 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:19:52,308 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:19:52,308 INFO L85 PathProgramCache]: Analyzing trace with hash -752503089, now seen corresponding path program 1 times [2023-08-04 09:19:52,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:19:52,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146342864] [2023-08-04 09:19:52,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:19:52,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:19:52,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:19:52,366 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 09:19:52,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:19:52,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146342864] [2023-08-04 09:19:52,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146342864] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:19:52,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733237231] [2023-08-04 09:19:52,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:19:52,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:19:52,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:19:52,369 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 09:19:52,371 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 09:19:52,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:19:52,468 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:19:52,470 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:19:52,476 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 09:19:52,476 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:19:52,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733237231] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:19:52,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:19:52,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:19:52,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845798048] [2023-08-04 09:19:52,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:19:52,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:19:52,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:19:52,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:19:52,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:19:52,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 443 [2023-08-04 09:19:52,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 52 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 202.66666666666666) internal successors, (608), 3 states have internal predecessors, (608), 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 09:19:52,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:19:52,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 443 [2023-08-04 09:19:52,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:19:52,819 INFO L124 PetriNetUnfolderBase]: 2060/2935 cut-off events. [2023-08-04 09:19:52,820 INFO L125 PetriNetUnfolderBase]: For 203/203 co-relation queries the response was YES. [2023-08-04 09:19:52,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6347 conditions, 2935 events. 2060/2935 cut-off events. For 203/203 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12952 event pairs, 1191 based on Foata normal form. 0/2098 useless extension candidates. Maximal degree in co-relation 5014. Up to 2780 conditions per place. [2023-08-04 09:19:52,832 INFO L140 encePairwiseOnDemand]: 440/443 looper letters, 51 selfloop transitions, 2 changer transitions 3/62 dead transitions. [2023-08-04 09:19:52,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 62 transitions, 290 flow [2023-08-04 09:19:52,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:19:52,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:19:52,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 637 transitions. [2023-08-04 09:19:52,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47930775018811134 [2023-08-04 09:19:52,835 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 637 transitions. [2023-08-04 09:19:52,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 637 transitions. [2023-08-04 09:19:52,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:19:52,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 637 transitions. [2023-08-04 09:19:52,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 212.33333333333334) internal successors, (637), 3 states have internal predecessors, (637), 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 09:19:52,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 443.0) internal successors, (1772), 4 states have internal predecessors, (1772), 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 09:19:52,839 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 443.0) internal successors, (1772), 4 states have internal predecessors, (1772), 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 09:19:52,840 INFO L175 Difference]: Start difference. First operand has 48 places, 52 transitions, 158 flow. Second operand 3 states and 637 transitions. [2023-08-04 09:19:52,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 62 transitions, 290 flow [2023-08-04 09:19:52,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 62 transitions, 288 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:19:52,847 INFO L231 Difference]: Finished difference. Result has 50 places, 50 transitions, 156 flow [2023-08-04 09:19:52,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=443, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=50, PETRI_TRANSITIONS=50} [2023-08-04 09:19:52,848 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 3 predicate places. [2023-08-04 09:19:52,848 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 50 transitions, 156 flow [2023-08-04 09:19:52,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 202.66666666666666) internal successors, (608), 3 states have internal predecessors, (608), 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 09:19:52,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:19:52,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:19:52,862 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 09:19:53,062 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 09:19:53,062 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:19:53,062 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:19:53,062 INFO L85 PathProgramCache]: Analyzing trace with hash 248176650, now seen corresponding path program 1 times [2023-08-04 09:19:53,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:19:53,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031701186] [2023-08-04 09:19:53,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:19:53,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:19:53,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:19:53,118 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 09:19:53,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:19:53,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031701186] [2023-08-04 09:19:53,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031701186] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:19:53,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651539330] [2023-08-04 09:19:53,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:19:53,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:19:53,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:19:53,120 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 09:19:53,145 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 09:19:53,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:19:53,239 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:19:53,242 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:19:53,283 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 09:19:53,283 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:19:53,306 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 09:19:53,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651539330] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:19:53,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:19:53,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:19:53,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836508224] [2023-08-04 09:19:53,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:19:53,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:19:53,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:19:53,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:19:53,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:19:53,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 443 [2023-08-04 09:19:53,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 50 transitions, 156 flow. Second operand has 5 states, 5 states have (on average 200.0) internal successors, (1000), 5 states have internal predecessors, (1000), 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 09:19:53,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:19:53,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 443 [2023-08-04 09:19:53,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:19:53,356 INFO L124 PetriNetUnfolderBase]: 12/28 cut-off events. [2023-08-04 09:19:53,356 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 09:19:53,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 28 events. 12/28 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 40 event pairs, 1 based on Foata normal form. 4/26 useless extension candidates. Maximal degree in co-relation 59. Up to 17 conditions per place. [2023-08-04 09:19:53,357 INFO L140 encePairwiseOnDemand]: 440/443 looper letters, 0 selfloop transitions, 0 changer transitions 16/16 dead transitions. [2023-08-04 09:19:53,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 16 transitions, 66 flow [2023-08-04 09:19:53,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:19:53,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:19:53,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 788 transitions. [2023-08-04 09:19:53,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44469525959367945 [2023-08-04 09:19:53,359 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 788 transitions. [2023-08-04 09:19:53,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 788 transitions. [2023-08-04 09:19:53,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:19:53,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 788 transitions. [2023-08-04 09:19:53,362 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 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 09:19:53,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 443.0) internal successors, (2215), 5 states have internal predecessors, (2215), 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 09:19:53,365 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 443.0) internal successors, (2215), 5 states have internal predecessors, (2215), 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 09:19:53,365 INFO L175 Difference]: Start difference. First operand has 50 places, 50 transitions, 156 flow. Second operand 4 states and 788 transitions. [2023-08-04 09:19:53,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 16 transitions, 66 flow [2023-08-04 09:19:53,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 16 transitions, 64 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:19:53,365 INFO L231 Difference]: Finished difference. Result has 22 places, 0 transitions, 0 flow [2023-08-04 09:19:53,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=443, PETRI_DIFFERENCE_MINUEND_FLOW=26, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=22, PETRI_TRANSITIONS=0} [2023-08-04 09:19:53,366 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -25 predicate places. [2023-08-04 09:19:53,366 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 0 transitions, 0 flow [2023-08-04 09:19:53,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 200.0) internal successors, (1000), 5 states have internal predecessors, (1000), 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 09:19:53,369 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 09:19:53,377 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 09:19:53,575 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 09:19:53,576 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:19:53,577 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 09:19:53,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 207 places, 231 transitions, 504 flow [2023-08-04 09:19:53,643 INFO L124 PetriNetUnfolderBase]: 105/703 cut-off events. [2023-08-04 09:19:53,643 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:19:53,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 764 conditions, 703 events. 105/703 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3327 event pairs, 0 based on Foata normal form. 0/588 useless extension candidates. Maximal degree in co-relation 412. Up to 16 conditions per place. [2023-08-04 09:19:53,646 INFO L82 GeneralOperation]: Start removeDead. Operand has 207 places, 231 transitions, 504 flow [2023-08-04 09:19:53,648 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 207 places, 231 transitions, 504 flow [2023-08-04 09:19:53,648 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:19:53,648 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 207 places, 231 transitions, 504 flow [2023-08-04 09:19:53,648 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 207 places, 231 transitions, 504 flow [2023-08-04 09:19:53,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 207 places, 231 transitions, 504 flow [2023-08-04 09:19:53,703 INFO L124 PetriNetUnfolderBase]: 105/703 cut-off events. [2023-08-04 09:19:53,703 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:19:53,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 764 conditions, 703 events. 105/703 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3327 event pairs, 0 based on Foata normal form. 0/588 useless extension candidates. Maximal degree in co-relation 412. Up to 16 conditions per place. [2023-08-04 09:19:53,714 INFO L119 LiptonReduction]: Number of co-enabled transitions 5808 [2023-08-04 09:19:59,054 INFO L134 LiptonReduction]: Checked pairs total: 11191 [2023-08-04 09:19:59,054 INFO L136 LiptonReduction]: Total number of compositions: 214 [2023-08-04 09:19:59,056 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 09:19:59,056 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;@3640166c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:19:59,056 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 09:19:59,060 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:19:59,061 INFO L124 PetriNetUnfolderBase]: 4/36 cut-off events. [2023-08-04 09:19:59,061 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:19:59,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:19:59,061 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-04 09:19:59,061 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 09:19:59,061 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:19:59,062 INFO L85 PathProgramCache]: Analyzing trace with hash 507919689, now seen corresponding path program 1 times [2023-08-04 09:19:59,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:19:59,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896165976] [2023-08-04 09:19:59,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:19:59,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:19:59,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:19:59,153 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 09:19:59,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:19:59,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896165976] [2023-08-04 09:19:59,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896165976] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:19:59,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:19:59,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:19:59,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791297804] [2023-08-04 09:19:59,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:19:59,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 09:19:59,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:19:59,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 09:19:59,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 09:19:59,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 445 [2023-08-04 09:19:59,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 54 transitions, 150 flow. Second operand has 4 states, 4 states have (on average 189.5) internal successors, (758), 4 states have internal predecessors, (758), 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 09:19:59,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:19:59,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 445 [2023-08-04 09:19:59,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:19:59,750 INFO L124 PetriNetUnfolderBase]: 4330/6085 cut-off events. [2023-08-04 09:19:59,750 INFO L125 PetriNetUnfolderBase]: For 333/333 co-relation queries the response was YES. [2023-08-04 09:19:59,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12258 conditions, 6085 events. 4330/6085 cut-off events. For 333/333 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 31451 event pairs, 2418 based on Foata normal form. 1/3869 useless extension candidates. Maximal degree in co-relation 9872. Up to 5804 conditions per place. [2023-08-04 09:19:59,769 INFO L140 encePairwiseOnDemand]: 439/445 looper letters, 23 selfloop transitions, 4 changer transitions 23/56 dead transitions. [2023-08-04 09:19:59,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 56 transitions, 248 flow [2023-08-04 09:19:59,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:19:59,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:19:59,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 803 transitions. [2023-08-04 09:19:59,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.451123595505618 [2023-08-04 09:19:59,772 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 803 transitions. [2023-08-04 09:19:59,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 803 transitions. [2023-08-04 09:19:59,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:19:59,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 803 transitions. [2023-08-04 09:19:59,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 200.75) internal successors, (803), 4 states have internal predecessors, (803), 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 09:19:59,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 445.0) internal successors, (2225), 5 states have internal predecessors, (2225), 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 09:19:59,777 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 445.0) internal successors, (2225), 5 states have internal predecessors, (2225), 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 09:19:59,777 INFO L175 Difference]: Start difference. First operand has 47 places, 54 transitions, 150 flow. Second operand 4 states and 803 transitions. [2023-08-04 09:19:59,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 56 transitions, 248 flow [2023-08-04 09:19:59,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 56 transitions, 248 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:19:59,779 INFO L231 Difference]: Finished difference. Result has 51 places, 33 transitions, 103 flow [2023-08-04 09:19:59,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=445, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=103, PETRI_PLACES=51, PETRI_TRANSITIONS=33} [2023-08-04 09:19:59,781 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 4 predicate places. [2023-08-04 09:19:59,782 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 33 transitions, 103 flow [2023-08-04 09:19:59,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 189.5) internal successors, (758), 4 states have internal predecessors, (758), 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 09:19:59,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:19:59,782 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:19:59,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 09:19:59,782 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 09:19:59,783 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:19:59,783 INFO L85 PathProgramCache]: Analyzing trace with hash -525743491, now seen corresponding path program 1 times [2023-08-04 09:19:59,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:19:59,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80154510] [2023-08-04 09:19:59,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:19:59,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:19:59,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:19:59,850 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 09:19:59,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:19:59,900 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 09:19:59,901 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 09:19:59,901 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 09:19:59,901 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 09:19:59,901 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 09:19:59,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 09:19:59,901 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 09:19:59,902 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 09:19:59,902 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 09:19:59,903 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 09:19:59,949 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 09:19:59,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 243 places, 276 transitions, 642 flow [2023-08-04 09:20:00,424 INFO L124 PetriNetUnfolderBase]: 895/4211 cut-off events. [2023-08-04 09:20:00,424 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 09:20:00,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4885 conditions, 4211 events. 895/4211 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 33720 event pairs, 11 based on Foata normal form. 0/3560 useless extension candidates. Maximal degree in co-relation 2504. Up to 192 conditions per place. [2023-08-04 09:20:00,455 INFO L82 GeneralOperation]: Start removeDead. Operand has 243 places, 276 transitions, 642 flow [2023-08-04 09:20:00,472 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 243 places, 276 transitions, 642 flow [2023-08-04 09:20:00,472 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:20:00,472 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 243 places, 276 transitions, 642 flow [2023-08-04 09:20:00,473 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 243 places, 276 transitions, 642 flow [2023-08-04 09:20:00,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 243 places, 276 transitions, 642 flow [2023-08-04 09:20:00,918 INFO L124 PetriNetUnfolderBase]: 895/4211 cut-off events. [2023-08-04 09:20:00,918 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 09:20:00,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4885 conditions, 4211 events. 895/4211 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 33720 event pairs, 11 based on Foata normal form. 0/3560 useless extension candidates. Maximal degree in co-relation 2504. Up to 192 conditions per place. [2023-08-04 09:20:01,044 INFO L119 LiptonReduction]: Number of co-enabled transitions 15180 [2023-08-04 09:20:07,394 INFO L134 LiptonReduction]: Checked pairs total: 35399 [2023-08-04 09:20:07,395 INFO L136 LiptonReduction]: Total number of compositions: 237 [2023-08-04 09:20:07,396 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:20:07,397 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;@3640166c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:20:07,397 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:20:07,400 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:20:07,400 INFO L124 PetriNetUnfolderBase]: 4/35 cut-off events. [2023-08-04 09:20:07,400 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 09:20:07,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:20:07,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:20:07,400 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:20:07,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:20:07,401 INFO L85 PathProgramCache]: Analyzing trace with hash -49448546, now seen corresponding path program 1 times [2023-08-04 09:20:07,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:20:07,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889499389] [2023-08-04 09:20:07,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:20:07,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:20:07,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:20:07,436 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 09:20:07,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:20:07,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889499389] [2023-08-04 09:20:07,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889499389] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:20:07,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:20:07,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:20:07,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366503299] [2023-08-04 09:20:07,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:20:07,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:20:07,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:20:07,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:20:07,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:20:07,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 513 [2023-08-04 09:20:07,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 81 transitions, 252 flow. Second operand has 3 states, 3 states have (on average 224.0) internal successors, (672), 3 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:20:07,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:20:07,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 513 [2023-08-04 09:20:07,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:21:44,576 INFO L124 PetriNetUnfolderBase]: 1058318/1259052 cut-off events. [2023-08-04 09:21:44,576 INFO L125 PetriNetUnfolderBase]: For 127657/127657 co-relation queries the response was YES. [2023-08-04 09:21:48,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2551806 conditions, 1259052 events. 1058318/1259052 cut-off events. For 127657/127657 co-relation queries the response was YES. Maximal size of possible extension queue 24727. Compared 6731321 event pairs, 534271 based on Foata normal form. 0/796940 useless extension candidates. Maximal degree in co-relation 925394. Up to 1228711 conditions per place. [2023-08-04 09:21:55,883 INFO L140 encePairwiseOnDemand]: 509/513 looper letters, 68 selfloop transitions, 2 changer transitions 3/85 dead transitions. [2023-08-04 09:21:55,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 85 transitions, 400 flow [2023-08-04 09:21:55,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:21:55,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:21:55,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 735 transitions. [2023-08-04 09:21:55,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4775828460038986 [2023-08-04 09:21:55,890 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 735 transitions. [2023-08-04 09:21:55,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 735 transitions. [2023-08-04 09:21:55,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:21:55,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 735 transitions. [2023-08-04 09:21:55,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 245.0) internal successors, (735), 3 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:21:55,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 513.0) internal successors, (2052), 4 states have internal predecessors, (2052), 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 09:21:55,895 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 513.0) internal successors, (2052), 4 states have internal predecessors, (2052), 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 09:21:55,896 INFO L175 Difference]: Start difference. First operand has 68 places, 81 transitions, 252 flow. Second operand 3 states and 735 transitions. [2023-08-04 09:21:55,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 85 transitions, 400 flow [2023-08-04 09:21:55,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 85 transitions, 400 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:21:56,001 INFO L231 Difference]: Finished difference. Result has 70 places, 78 transitions, 244 flow [2023-08-04 09:21:56,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=513, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=244, PETRI_PLACES=70, PETRI_TRANSITIONS=78} [2023-08-04 09:21:56,014 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 2 predicate places. [2023-08-04 09:21:56,014 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 78 transitions, 244 flow [2023-08-04 09:21:56,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 224.0) internal successors, (672), 3 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:21:56,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:21:56,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:21:56,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-04 09:21:56,015 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:21:56,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:21:56,015 INFO L85 PathProgramCache]: Analyzing trace with hash 392465601, now seen corresponding path program 1 times [2023-08-04 09:21:56,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:21:56,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917951156] [2023-08-04 09:21:56,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:21:56,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:21:56,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:21:56,093 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 09:21:56,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:21:56,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917951156] [2023-08-04 09:21:56,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917951156] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:21:56,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700810997] [2023-08-04 09:21:56,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:21:56,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:21:56,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:21:56,114 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 09:21:56,177 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 09:21:56,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:21:56,312 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:21:56,313 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:21:56,318 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 09:21:56,318 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:21:56,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700810997] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:21:56,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:21:56,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:21:56,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342718188] [2023-08-04 09:21:56,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:21:56,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:21:56,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:21:56,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:21:56,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:21:56,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 513 [2023-08-04 09:21:56,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 78 transitions, 244 flow. Second operand has 3 states, 3 states have (on average 225.0) internal successors, (675), 3 states have internal predecessors, (675), 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 09:21:56,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:21:56,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 513 [2023-08-04 09:21:56,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand