/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-multiply-verify.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 09:28:51,390 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 09:28:51,457 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 09:28:51,460 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 09:28:51,460 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 09:28:51,461 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 09:28:51,461 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 09:28:51,483 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 09:28:51,483 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 09:28:51,486 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 09:28:51,486 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 09:28:51,486 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 09:28:51,487 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 09:28:51,488 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 09:28:51,488 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 09:28:51,488 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 09:28:51,488 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 09:28:51,488 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 09:28:51,488 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 09:28:51,489 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 09:28:51,489 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 09:28:51,489 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 09:28:51,489 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 09:28:51,489 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 09:28:51,489 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 09:28:51,490 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 09:28:51,491 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 09:28:51,491 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 09:28:51,491 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 09:28:51,491 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 09:28:51,492 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:28:51,492 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 09:28:51,492 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 09:28:51,492 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 09:28:51,492 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 09:28:51,493 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 09:28:51,493 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 09:28:51,493 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 09:28:51,493 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 09:28:51,493 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 09:28:51,493 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 09:28:51,493 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 09:28:51,688 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 09:28:51,714 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 09:28:51,715 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 09:28:51,716 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 09:28:51,716 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 09:28:51,717 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-multiply-verify.wvr_bound2.c [2023-08-04 09:28:52,812 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 09:28:52,982 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 09:28:52,982 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-multiply-verify.wvr_bound2.c [2023-08-04 09:28:52,988 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c52cff7f2/658b632557f946cabd86c2ea40b7bdd4/FLAGe58bfb393 [2023-08-04 09:28:52,998 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c52cff7f2/658b632557f946cabd86c2ea40b7bdd4 [2023-08-04 09:28:53,000 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 09:28:53,001 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 09:28:53,002 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 09:28:53,002 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 09:28:53,004 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 09:28:53,004 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:28:52" (1/1) ... [2023-08-04 09:28:53,005 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59a3ab6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:28:53, skipping insertion in model container [2023-08-04 09:28:53,005 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:28:52" (1/1) ... [2023-08-04 09:28:53,021 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 09:28:53,141 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-multiply-verify.wvr_bound2.c[3285,3298] [2023-08-04 09:28:53,147 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:28:53,154 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 09:28:53,175 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-multiply-verify.wvr_bound2.c[3285,3298] [2023-08-04 09:28:53,187 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:28:53,194 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:28:53,194 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:28:53,199 INFO L206 MainTranslator]: Completed translation [2023-08-04 09:28:53,200 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:28:53 WrapperNode [2023-08-04 09:28:53,200 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 09:28:53,201 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 09:28:53,201 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 09:28:53,201 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 09:28:53,206 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:28:53" (1/1) ... [2023-08-04 09:28:53,213 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:28:53" (1/1) ... [2023-08-04 09:28:53,234 INFO L138 Inliner]: procedures = 26, calls = 50, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 232 [2023-08-04 09:28:53,235 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 09:28:53,235 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 09:28:53,235 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 09:28:53,235 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 09:28:53,245 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:28:53" (1/1) ... [2023-08-04 09:28:53,245 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:28:53" (1/1) ... [2023-08-04 09:28:53,248 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:28:53" (1/1) ... [2023-08-04 09:28:53,248 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:28:53" (1/1) ... [2023-08-04 09:28:53,261 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:28:53" (1/1) ... [2023-08-04 09:28:53,264 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:28:53" (1/1) ... [2023-08-04 09:28:53,265 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:28:53" (1/1) ... [2023-08-04 09:28:53,266 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:28:53" (1/1) ... [2023-08-04 09:28:53,268 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 09:28:53,268 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 09:28:53,268 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 09:28:53,269 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 09:28:53,269 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:28:53" (1/1) ... [2023-08-04 09:28:53,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:28:53,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:28:53,304 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 09:28:53,310 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 09:28:53,330 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 09:28:53,330 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 09:28:53,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 09:28:53,330 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 09:28:53,330 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 09:28:53,330 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 09:28:53,330 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 09:28:53,330 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 09:28:53,330 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 09:28:53,330 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 09:28:53,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 09:28:53,331 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 09:28:53,331 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 09:28:53,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 09:28:53,331 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 09:28:53,331 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 09:28:53,331 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 09:28:53,332 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 09:28:53,402 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 09:28:53,403 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 09:28:53,620 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 09:28:53,719 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 09:28:53,719 INFO L302 CfgBuilder]: Removed 9 assume(true) statements. [2023-08-04 09:28:53,729 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:28:53 BoogieIcfgContainer [2023-08-04 09:28:53,730 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 09:28:53,732 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 09:28:53,732 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 09:28:53,735 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 09:28:53,735 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 09:28:52" (1/3) ... [2023-08-04 09:28:53,736 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@272a49dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:28:53, skipping insertion in model container [2023-08-04 09:28:53,737 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:28:53" (2/3) ... [2023-08-04 09:28:53,737 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@272a49dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:28:53, skipping insertion in model container [2023-08-04 09:28:53,737 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:28:53" (3/3) ... [2023-08-04 09:28:53,738 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-more-multiply-verify.wvr_bound2.c [2023-08-04 09:28:53,744 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 09:28:53,752 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 09:28:53,752 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 09:28:53,752 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 09:28:53,823 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 09:28:53,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 197 transitions, 436 flow [2023-08-04 09:28:53,968 INFO L124 PetriNetUnfolderBase]: 92/661 cut-off events. [2023-08-04 09:28:53,969 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:28:53,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 722 conditions, 661 events. 92/661 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3345 event pairs, 0 based on Foata normal form. 0/559 useless extension candidates. Maximal degree in co-relation 394. Up to 16 conditions per place. [2023-08-04 09:28:53,982 INFO L82 GeneralOperation]: Start removeDead. Operand has 180 places, 197 transitions, 436 flow [2023-08-04 09:28:53,987 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 180 places, 197 transitions, 436 flow [2023-08-04 09:28:53,989 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:28:53,995 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 180 places, 197 transitions, 436 flow [2023-08-04 09:28:53,997 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 180 places, 197 transitions, 436 flow [2023-08-04 09:28:53,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 197 transitions, 436 flow [2023-08-04 09:28:54,060 INFO L124 PetriNetUnfolderBase]: 92/661 cut-off events. [2023-08-04 09:28:54,060 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:28:54,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 722 conditions, 661 events. 92/661 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3345 event pairs, 0 based on Foata normal form. 0/559 useless extension candidates. Maximal degree in co-relation 394. Up to 16 conditions per place. [2023-08-04 09:28:54,070 INFO L119 LiptonReduction]: Number of co-enabled transitions 5712 [2023-08-04 09:28:57,746 INFO L134 LiptonReduction]: Checked pairs total: 11406 [2023-08-04 09:28:57,746 INFO L136 LiptonReduction]: Total number of compositions: 168 [2023-08-04 09:28:57,765 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:28:57,776 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;@44212178, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:28:57,776 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:28:57,782 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:28:57,783 INFO L124 PetriNetUnfolderBase]: 3/34 cut-off events. [2023-08-04 09:28:57,783 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:28:57,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:28:57,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:28:57,784 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:28:57,789 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:28:57,789 INFO L85 PathProgramCache]: Analyzing trace with hash 592924939, now seen corresponding path program 1 times [2023-08-04 09:28:57,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:28:57,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567544010] [2023-08-04 09:28:57,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:28:57,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:28:57,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:28:58,015 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 09:28:58,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:28:58,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567544010] [2023-08-04 09:28:58,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567544010] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:28:58,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:28:58,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:28:58,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845876366] [2023-08-04 09:28:58,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:28:58,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:28:58,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:28:58,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:28:58,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:28:58,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 365 [2023-08-04 09:28:58,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 50 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 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 09:28:58,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:28:58,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 365 [2023-08-04 09:28:58,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:28:58,301 INFO L124 PetriNetUnfolderBase]: 1533/2542 cut-off events. [2023-08-04 09:28:58,302 INFO L125 PetriNetUnfolderBase]: For 180/180 co-relation queries the response was YES. [2023-08-04 09:28:58,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5010 conditions, 2542 events. 1533/2542 cut-off events. For 180/180 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 13171 event pairs, 658 based on Foata normal form. 0/1858 useless extension candidates. Maximal degree in co-relation 4035. Up to 2264 conditions per place. [2023-08-04 09:28:58,312 INFO L140 encePairwiseOnDemand]: 361/365 looper letters, 42 selfloop transitions, 2 changer transitions 4/53 dead transitions. [2023-08-04 09:28:58,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 238 flow [2023-08-04 09:28:58,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:28:58,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:28:58,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 542 transitions. [2023-08-04 09:28:58,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4949771689497717 [2023-08-04 09:28:58,324 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 542 transitions. [2023-08-04 09:28:58,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 542 transitions. [2023-08-04 09:28:58,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:28:58,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 542 transitions. [2023-08-04 09:28:58,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 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 09:28:58,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 365.0) internal successors, (1460), 4 states have internal predecessors, (1460), 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 09:28:58,334 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 365.0) internal successors, (1460), 4 states have internal predecessors, (1460), 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 09:28:58,336 INFO L175 Difference]: Start difference. First operand has 45 places, 50 transitions, 142 flow. Second operand 3 states and 542 transitions. [2023-08-04 09:28:58,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 238 flow [2023-08-04 09:28:58,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 53 transitions, 238 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:28:58,341 INFO L231 Difference]: Finished difference. Result has 47 places, 46 transitions, 136 flow [2023-08-04 09:28:58,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=47, PETRI_TRANSITIONS=46} [2023-08-04 09:28:58,344 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 2 predicate places. [2023-08-04 09:28:58,344 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 46 transitions, 136 flow [2023-08-04 09:28:58,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 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 09:28:58,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:28:58,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:28:58,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 09:28:58,345 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:28:58,345 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:28:58,345 INFO L85 PathProgramCache]: Analyzing trace with hash -28896282, now seen corresponding path program 1 times [2023-08-04 09:28:58,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:28:58,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608474090] [2023-08-04 09:28:58,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:28:58,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:28:58,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:28:58,400 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 09:28:58,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:28:58,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608474090] [2023-08-04 09:28:58,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608474090] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:28:58,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768115867] [2023-08-04 09:28:58,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:28:58,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:28:58,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:28:58,403 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 09:28:58,423 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 09:28:58,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:28:58,465 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:28:58,468 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:28:58,489 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 09:28:58,489 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:28:58,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768115867] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:28:58,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:28:58,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:28:58,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751359671] [2023-08-04 09:28:58,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:28:58,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:28:58,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:28:58,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:28:58,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:28:58,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 365 [2023-08-04 09:28:58,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 46 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 168.66666666666666) internal successors, (506), 3 states have internal predecessors, (506), 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 09:28:58,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:28:58,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 365 [2023-08-04 09:28:58,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:28:58,670 INFO L124 PetriNetUnfolderBase]: 1476/2398 cut-off events. [2023-08-04 09:28:58,670 INFO L125 PetriNetUnfolderBase]: For 172/172 co-relation queries the response was YES. [2023-08-04 09:28:58,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4764 conditions, 2398 events. 1476/2398 cut-off events. For 172/172 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 11893 event pairs, 654 based on Foata normal form. 0/1758 useless extension candidates. Maximal degree in co-relation 3792. Up to 2147 conditions per place. [2023-08-04 09:28:58,681 INFO L140 encePairwiseOnDemand]: 362/365 looper letters, 45 selfloop transitions, 2 changer transitions 1/53 dead transitions. [2023-08-04 09:28:58,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 246 flow [2023-08-04 09:28:58,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:28:58,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:28:58,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 544 transitions. [2023-08-04 09:28:58,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4968036529680365 [2023-08-04 09:28:58,684 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 544 transitions. [2023-08-04 09:28:58,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 544 transitions. [2023-08-04 09:28:58,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:28:58,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 544 transitions. [2023-08-04 09:28:58,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 181.33333333333334) internal successors, (544), 3 states have internal predecessors, (544), 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 09:28:58,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 365.0) internal successors, (1460), 4 states have internal predecessors, (1460), 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 09:28:58,688 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 365.0) internal successors, (1460), 4 states have internal predecessors, (1460), 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 09:28:58,688 INFO L175 Difference]: Start difference. First operand has 47 places, 46 transitions, 136 flow. Second operand 3 states and 544 transitions. [2023-08-04 09:28:58,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 246 flow [2023-08-04 09:28:58,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 53 transitions, 230 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-04 09:28:58,691 INFO L231 Difference]: Finished difference. Result has 42 places, 46 transitions, 128 flow [2023-08-04 09:28:58,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=42, PETRI_TRANSITIONS=46} [2023-08-04 09:28:58,692 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -3 predicate places. [2023-08-04 09:28:58,692 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 46 transitions, 128 flow [2023-08-04 09:28:58,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.66666666666666) internal successors, (506), 3 states have internal predecessors, (506), 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 09:28:58,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:28:58,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:28:58,713 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 09:28:58,898 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 09:28:58,898 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:28:58,899 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:28:58,899 INFO L85 PathProgramCache]: Analyzing trace with hash 118669699, now seen corresponding path program 1 times [2023-08-04 09:28:58,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:28:58,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770419094] [2023-08-04 09:28:58,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:28:58,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:28:58,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:28:58,944 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 09:28:58,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:28:58,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770419094] [2023-08-04 09:28:58,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770419094] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:28:58,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994704862] [2023-08-04 09:28:58,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:28:58,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:28:58,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:28:58,946 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 09:28:58,973 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 09:28:59,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:28:59,009 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:28:59,010 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:28:59,015 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 09:28:59,015 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:28:59,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994704862] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:28:59,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:28:59,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:28:59,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912705858] [2023-08-04 09:28:59,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:28:59,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:28:59,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:28:59,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:28:59,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:28:59,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 365 [2023-08-04 09:28:59,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 46 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 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 09:28:59,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:28:59,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 365 [2023-08-04 09:28:59,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:28:59,210 INFO L124 PetriNetUnfolderBase]: 1467/2299 cut-off events. [2023-08-04 09:28:59,211 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-08-04 09:28:59,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4670 conditions, 2299 events. 1467/2299 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10461 event pairs, 795 based on Foata normal form. 0/1707 useless extension candidates. Maximal degree in co-relation 1816. Up to 2036 conditions per place. [2023-08-04 09:28:59,220 INFO L140 encePairwiseOnDemand]: 362/365 looper letters, 47 selfloop transitions, 2 changer transitions 1/55 dead transitions. [2023-08-04 09:28:59,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 55 transitions, 246 flow [2023-08-04 09:28:59,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:28:59,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:28:59,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 546 transitions. [2023-08-04 09:28:59,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4986301369863014 [2023-08-04 09:28:59,222 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 546 transitions. [2023-08-04 09:28:59,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 546 transitions. [2023-08-04 09:28:59,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:28:59,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 546 transitions. [2023-08-04 09:28:59,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 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 09:28:59,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 365.0) internal successors, (1460), 4 states have internal predecessors, (1460), 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 09:28:59,225 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 365.0) internal successors, (1460), 4 states have internal predecessors, (1460), 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 09:28:59,225 INFO L175 Difference]: Start difference. First operand has 42 places, 46 transitions, 128 flow. Second operand 3 states and 546 transitions. [2023-08-04 09:28:59,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 55 transitions, 246 flow [2023-08-04 09:28:59,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 55 transitions, 242 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:28:59,229 INFO L231 Difference]: Finished difference. Result has 43 places, 46 transitions, 132 flow [2023-08-04 09:28:59,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=43, PETRI_TRANSITIONS=46} [2023-08-04 09:28:59,230 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -2 predicate places. [2023-08-04 09:28:59,230 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 46 transitions, 132 flow [2023-08-04 09:28:59,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 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 09:28:59,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:28:59,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:28:59,253 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-04 09:28:59,435 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 09:28:59,436 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:28:59,436 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:28:59,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1230405635, now seen corresponding path program 1 times [2023-08-04 09:28:59,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:28:59,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032914105] [2023-08-04 09:28:59,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:28:59,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:28:59,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:28:59,535 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 09:28:59,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:28:59,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032914105] [2023-08-04 09:28:59,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032914105] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:28:59,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973016426] [2023-08-04 09:28:59,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:28:59,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:28:59,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:28:59,553 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 09:28:59,585 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 09:28:59,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:28:59,625 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:28:59,626 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:28:59,632 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 09:28:59,633 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:28:59,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973016426] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:28:59,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:28:59,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:28:59,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468413733] [2023-08-04 09:28:59,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:28:59,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:28:59,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:28:59,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:28:59,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:28:59,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 365 [2023-08-04 09:28:59,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 46 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 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 09:28:59,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:28:59,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 365 [2023-08-04 09:28:59,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:28:59,791 INFO L124 PetriNetUnfolderBase]: 957/1582 cut-off events. [2023-08-04 09:28:59,791 INFO L125 PetriNetUnfolderBase]: For 78/78 co-relation queries the response was YES. [2023-08-04 09:28:59,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3279 conditions, 1582 events. 957/1582 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 6706 event pairs, 519 based on Foata normal form. 0/1221 useless extension candidates. Maximal degree in co-relation 1355. Up to 1199 conditions per place. [2023-08-04 09:28:59,798 INFO L140 encePairwiseOnDemand]: 362/365 looper letters, 52 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-08-04 09:28:59,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 59 transitions, 272 flow [2023-08-04 09:28:59,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:28:59,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:28:59,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 550 transitions. [2023-08-04 09:28:59,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.502283105022831 [2023-08-04 09:28:59,802 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 550 transitions. [2023-08-04 09:28:59,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 550 transitions. [2023-08-04 09:28:59,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:28:59,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 550 transitions. [2023-08-04 09:28:59,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 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 09:28:59,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 365.0) internal successors, (1460), 4 states have internal predecessors, (1460), 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 09:28:59,805 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 365.0) internal successors, (1460), 4 states have internal predecessors, (1460), 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 09:28:59,805 INFO L175 Difference]: Start difference. First operand has 43 places, 46 transitions, 132 flow. Second operand 3 states and 550 transitions. [2023-08-04 09:28:59,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 59 transitions, 272 flow [2023-08-04 09:28:59,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 59 transitions, 268 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:28:59,807 INFO L231 Difference]: Finished difference. Result has 44 places, 47 transitions, 140 flow [2023-08-04 09:28:59,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=44, PETRI_TRANSITIONS=47} [2023-08-04 09:28:59,808 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -1 predicate places. [2023-08-04 09:28:59,808 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 47 transitions, 140 flow [2023-08-04 09:28:59,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 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 09:28:59,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:28:59,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:28:59,824 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 09:29:00,013 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 09:29:00,014 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:29:00,014 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:29:00,014 INFO L85 PathProgramCache]: Analyzing trace with hash -398723905, now seen corresponding path program 1 times [2023-08-04 09:29:00,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:29:00,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137590705] [2023-08-04 09:29:00,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:29:00,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:29:00,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:29:00,054 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 09:29:00,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:29:00,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137590705] [2023-08-04 09:29:00,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137590705] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:29:00,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40627533] [2023-08-04 09:29:00,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:29:00,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:29:00,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:29:00,056 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 09:29:00,105 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 09:29:00,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:29:00,170 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:29:00,171 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:29:00,180 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 09:29:00,180 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:29:00,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40627533] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:29:00,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:29:00,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:29:00,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604962541] [2023-08-04 09:29:00,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:29:00,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:29:00,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:29:00,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:29:00,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:29:00,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 365 [2023-08-04 09:29:00,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 47 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 172.33333333333334) internal successors, (517), 3 states have internal predecessors, (517), 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 09:29:00,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:29:00,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 365 [2023-08-04 09:29:00,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:29:00,342 INFO L124 PetriNetUnfolderBase]: 796/1344 cut-off events. [2023-08-04 09:29:00,342 INFO L125 PetriNetUnfolderBase]: For 175/175 co-relation queries the response was YES. [2023-08-04 09:29:00,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2889 conditions, 1344 events. 796/1344 cut-off events. For 175/175 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 5488 event pairs, 481 based on Foata normal form. 0/1099 useless extension candidates. Maximal degree in co-relation 1178. Up to 1027 conditions per place. [2023-08-04 09:29:00,348 INFO L140 encePairwiseOnDemand]: 362/365 looper letters, 53 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2023-08-04 09:29:00,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 60 transitions, 282 flow [2023-08-04 09:29:00,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:29:00,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:29:00,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 550 transitions. [2023-08-04 09:29:00,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.502283105022831 [2023-08-04 09:29:00,350 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 550 transitions. [2023-08-04 09:29:00,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 550 transitions. [2023-08-04 09:29:00,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:29:00,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 550 transitions. [2023-08-04 09:29:00,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 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 09:29:00,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 365.0) internal successors, (1460), 4 states have internal predecessors, (1460), 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 09:29:00,353 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 365.0) internal successors, (1460), 4 states have internal predecessors, (1460), 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 09:29:00,353 INFO L175 Difference]: Start difference. First operand has 44 places, 47 transitions, 140 flow. Second operand 3 states and 550 transitions. [2023-08-04 09:29:00,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 60 transitions, 282 flow [2023-08-04 09:29:00,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 60 transitions, 280 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:29:00,355 INFO L231 Difference]: Finished difference. Result has 46 places, 48 transitions, 150 flow [2023-08-04 09:29:00,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=46, PETRI_TRANSITIONS=48} [2023-08-04 09:29:00,356 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 1 predicate places. [2023-08-04 09:29:00,356 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 48 transitions, 150 flow [2023-08-04 09:29:00,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 172.33333333333334) internal successors, (517), 3 states have internal predecessors, (517), 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 09:29:00,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:29:00,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:29:00,371 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 09:29:00,561 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 09:29:00,562 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:29:00,562 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:29:00,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1892612329, now seen corresponding path program 1 times [2023-08-04 09:29:00,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:29:00,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122051815] [2023-08-04 09:29:00,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:29:00,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:29:00,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:29:00,606 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 09:29:00,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:29:00,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122051815] [2023-08-04 09:29:00,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122051815] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:29:00,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826642485] [2023-08-04 09:29:00,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:29:00,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:29:00,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:29:00,607 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 09:29:00,609 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 09:29:00,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:29:00,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:29:00,681 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:29:00,689 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 09:29:00,689 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:29:00,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826642485] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:29:00,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:29:00,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:29:00,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719740448] [2023-08-04 09:29:00,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:29:00,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:29:00,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:29:00,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:29:00,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:29:00,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 365 [2023-08-04 09:29:00,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 48 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 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 09:29:00,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:29:00,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 365 [2023-08-04 09:29:00,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:29:00,817 INFO L124 PetriNetUnfolderBase]: 787/1328 cut-off events. [2023-08-04 09:29:00,817 INFO L125 PetriNetUnfolderBase]: For 160/160 co-relation queries the response was YES. [2023-08-04 09:29:00,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2899 conditions, 1328 events. 787/1328 cut-off events. For 160/160 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 5400 event pairs, 554 based on Foata normal form. 0/1104 useless extension candidates. Maximal degree in co-relation 2150. Up to 1187 conditions per place. [2023-08-04 09:29:00,822 INFO L140 encePairwiseOnDemand]: 362/365 looper letters, 47 selfloop transitions, 2 changer transitions 3/57 dead transitions. [2023-08-04 09:29:00,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 57 transitions, 272 flow [2023-08-04 09:29:00,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:29:00,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:29:00,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 546 transitions. [2023-08-04 09:29:00,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4986301369863014 [2023-08-04 09:29:00,823 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 546 transitions. [2023-08-04 09:29:00,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 546 transitions. [2023-08-04 09:29:00,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:29:00,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 546 transitions. [2023-08-04 09:29:00,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 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 09:29:00,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 365.0) internal successors, (1460), 4 states have internal predecessors, (1460), 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 09:29:00,827 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 365.0) internal successors, (1460), 4 states have internal predecessors, (1460), 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 09:29:00,827 INFO L175 Difference]: Start difference. First operand has 46 places, 48 transitions, 150 flow. Second operand 3 states and 546 transitions. [2023-08-04 09:29:00,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 57 transitions, 272 flow [2023-08-04 09:29:00,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 57 transitions, 270 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:29:00,830 INFO L231 Difference]: Finished difference. Result has 48 places, 46 transitions, 148 flow [2023-08-04 09:29:00,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=48, PETRI_TRANSITIONS=46} [2023-08-04 09:29:00,830 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2023-08-04 09:29:00,830 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 46 transitions, 148 flow [2023-08-04 09:29:00,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 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 09:29:00,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:29:00,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:29:00,843 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-04 09:29:01,036 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 09:29:01,036 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:29:01,036 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:29:01,037 INFO L85 PathProgramCache]: Analyzing trace with hash 463219536, now seen corresponding path program 1 times [2023-08-04 09:29:01,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:29:01,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966783393] [2023-08-04 09:29:01,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:29:01,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:29:01,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:29:01,083 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 09:29:01,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:29:01,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966783393] [2023-08-04 09:29:01,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966783393] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:29:01,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047430305] [2023-08-04 09:29:01,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:29:01,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:29:01,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:29:01,084 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 09:29:01,097 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 09:29:01,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:29:01,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:29:01,171 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:29:01,196 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 09:29:01,196 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:29:01,215 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 09:29:01,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047430305] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:29:01,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:29:01,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:29:01,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837881329] [2023-08-04 09:29:01,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:29:01,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:29:01,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:29:01,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:29:01,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:29:01,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 365 [2023-08-04 09:29:01,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 148 flow. Second operand has 5 states, 5 states have (on average 171.4) internal successors, (857), 5 states have internal predecessors, (857), 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 09:29:01,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:29:01,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 365 [2023-08-04 09:29:01,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:29:01,250 INFO L124 PetriNetUnfolderBase]: 8/20 cut-off events. [2023-08-04 09:29:01,250 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:29:01,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 20 events. 8/20 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 22 event pairs, 0 based on Foata normal form. 3/20 useless extension candidates. Maximal degree in co-relation 44. Up to 12 conditions per place. [2023-08-04 09:29:01,250 INFO L140 encePairwiseOnDemand]: 362/365 looper letters, 0 selfloop transitions, 0 changer transitions 13/13 dead transitions. [2023-08-04 09:29:01,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 13 transitions, 56 flow [2023-08-04 09:29:01,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:29:01,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:29:01,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 670 transitions. [2023-08-04 09:29:01,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4589041095890411 [2023-08-04 09:29:01,252 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 670 transitions. [2023-08-04 09:29:01,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 670 transitions. [2023-08-04 09:29:01,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:29:01,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 670 transitions. [2023-08-04 09:29:01,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 167.5) internal successors, (670), 4 states have internal predecessors, (670), 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 09:29:01,256 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 365.0) internal successors, (1825), 5 states have internal predecessors, (1825), 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 09:29:01,257 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 365.0) internal successors, (1825), 5 states have internal predecessors, (1825), 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 09:29:01,257 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 148 flow. Second operand 4 states and 670 transitions. [2023-08-04 09:29:01,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 13 transitions, 56 flow [2023-08-04 09:29:01,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 13 transitions, 54 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:29:01,257 INFO L231 Difference]: Finished difference. Result has 20 places, 0 transitions, 0 flow [2023-08-04 09:29:01,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=20, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=9, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=20, PETRI_TRANSITIONS=0} [2023-08-04 09:29:01,258 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -25 predicate places. [2023-08-04 09:29:01,258 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 0 transitions, 0 flow [2023-08-04 09:29:01,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 171.4) internal successors, (857), 5 states have internal predecessors, (857), 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 09:29:01,262 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 09:29:01,271 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 09:29:01,468 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 09:29:01,469 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:29:01,473 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 09:29:01,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 197 transitions, 436 flow [2023-08-04 09:29:01,526 INFO L124 PetriNetUnfolderBase]: 92/661 cut-off events. [2023-08-04 09:29:01,527 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:29:01,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 722 conditions, 661 events. 92/661 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3345 event pairs, 0 based on Foata normal form. 0/559 useless extension candidates. Maximal degree in co-relation 394. Up to 16 conditions per place. [2023-08-04 09:29:01,529 INFO L82 GeneralOperation]: Start removeDead. Operand has 180 places, 197 transitions, 436 flow [2023-08-04 09:29:01,531 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 180 places, 197 transitions, 436 flow [2023-08-04 09:29:01,531 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:29:01,531 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 180 places, 197 transitions, 436 flow [2023-08-04 09:29:01,531 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 180 places, 197 transitions, 436 flow [2023-08-04 09:29:01,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 197 transitions, 436 flow [2023-08-04 09:29:01,577 INFO L124 PetriNetUnfolderBase]: 92/661 cut-off events. [2023-08-04 09:29:01,577 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:29:01,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 722 conditions, 661 events. 92/661 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3345 event pairs, 0 based on Foata normal form. 0/559 useless extension candidates. Maximal degree in co-relation 394. Up to 16 conditions per place. [2023-08-04 09:29:01,586 INFO L119 LiptonReduction]: Number of co-enabled transitions 5712 [2023-08-04 09:29:05,529 INFO L134 LiptonReduction]: Checked pairs total: 11578 [2023-08-04 09:29:05,529 INFO L136 LiptonReduction]: Total number of compositions: 168 [2023-08-04 09:29:05,531 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 09:29:05,531 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;@44212178, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:29:05,531 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 09:29:05,534 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:29:05,534 INFO L124 PetriNetUnfolderBase]: 3/32 cut-off events. [2023-08-04 09:29:05,534 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:29:05,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:29:05,534 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-04 09:29:05,534 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 09:29:05,534 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:29:05,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1407464996, now seen corresponding path program 1 times [2023-08-04 09:29:05,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:29:05,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456278863] [2023-08-04 09:29:05,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:29:05,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:29:05,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:29:05,553 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 09:29:05,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:29:05,578 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 09:29:05,578 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 09:29:05,578 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 09:29:05,578 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 09:29:05,578 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 09:29:05,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 09:29:05,579 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 09:29:05,579 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 09:29:05,579 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 09:29:05,580 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 09:29:05,603 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 09:29:05,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 217 places, 241 transitions, 572 flow [2023-08-04 09:29:05,938 INFO L124 PetriNetUnfolderBase]: 854/4132 cut-off events. [2023-08-04 09:29:05,938 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 09:29:05,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4806 conditions, 4132 events. 854/4132 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 33598 event pairs, 11 based on Foata normal form. 0/3522 useless extension candidates. Maximal degree in co-relation 2476. Up to 192 conditions per place. [2023-08-04 09:29:05,970 INFO L82 GeneralOperation]: Start removeDead. Operand has 217 places, 241 transitions, 572 flow [2023-08-04 09:29:05,989 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 217 places, 241 transitions, 572 flow [2023-08-04 09:29:05,989 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:29:05,989 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 217 places, 241 transitions, 572 flow [2023-08-04 09:29:05,989 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 217 places, 241 transitions, 572 flow [2023-08-04 09:29:05,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 217 places, 241 transitions, 572 flow [2023-08-04 09:29:06,316 INFO L124 PetriNetUnfolderBase]: 854/4132 cut-off events. [2023-08-04 09:29:06,316 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 09:29:06,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4806 conditions, 4132 events. 854/4132 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 33598 event pairs, 11 based on Foata normal form. 0/3522 useless extension candidates. Maximal degree in co-relation 2476. Up to 192 conditions per place. [2023-08-04 09:29:06,414 INFO L119 LiptonReduction]: Number of co-enabled transitions 14832 [2023-08-04 09:29:10,435 INFO L134 LiptonReduction]: Checked pairs total: 35591 [2023-08-04 09:29:10,435 INFO L136 LiptonReduction]: Total number of compositions: 190 [2023-08-04 09:29:10,437 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:29:10,441 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;@44212178, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:29:10,441 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:29:10,443 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:29:10,443 INFO L124 PetriNetUnfolderBase]: 3/31 cut-off events. [2023-08-04 09:29:10,443 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 09:29:10,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:29:10,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:29:10,444 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:29:10,444 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:29:10,444 INFO L85 PathProgramCache]: Analyzing trace with hash -938088195, now seen corresponding path program 1 times [2023-08-04 09:29:10,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:29:10,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266278956] [2023-08-04 09:29:10,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:29:10,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:29:10,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:29:10,481 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 09:29:10,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:29:10,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266278956] [2023-08-04 09:29:10,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266278956] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:29:10,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:29:10,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:29:10,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344143658] [2023-08-04 09:29:10,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:29:10,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:29:10,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:29:10,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:29:10,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:29:10,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 431 [2023-08-04 09:29:10,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 75 transitions, 240 flow. Second operand has 3 states, 3 states have (on average 194.66666666666666) internal successors, (584), 3 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:29:10,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:29:10,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 431 [2023-08-04 09:29:10,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:29:28,212 INFO L124 PetriNetUnfolderBase]: 195308/260653 cut-off events. [2023-08-04 09:29:28,212 INFO L125 PetriNetUnfolderBase]: For 34748/34748 co-relation queries the response was YES. [2023-08-04 09:29:28,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 522038 conditions, 260653 events. 195308/260653 cut-off events. For 34748/34748 co-relation queries the response was YES. Maximal size of possible extension queue 5900. Compared 1736406 event pairs, 110902 based on Foata normal form. 0/196489 useless extension candidates. Maximal degree in co-relation 170844. Up to 240499 conditions per place. [2023-08-04 09:29:29,657 INFO L140 encePairwiseOnDemand]: 427/431 looper letters, 64 selfloop transitions, 2 changer transitions 3/79 dead transitions. [2023-08-04 09:29:29,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 79 transitions, 380 flow [2023-08-04 09:29:29,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:29:29,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:29:29,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 644 transitions. [2023-08-04 09:29:29,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4980665119876257 [2023-08-04 09:29:29,663 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 644 transitions. [2023-08-04 09:29:29,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 644 transitions. [2023-08-04 09:29:29,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:29:29,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 644 transitions. [2023-08-04 09:29:29,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 214.66666666666666) internal successors, (644), 3 states have internal predecessors, (644), 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 09:29:29,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 431.0) internal successors, (1724), 4 states have internal predecessors, (1724), 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 09:29:29,668 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 431.0) internal successors, (1724), 4 states have internal predecessors, (1724), 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 09:29:29,668 INFO L175 Difference]: Start difference. First operand has 65 places, 75 transitions, 240 flow. Second operand 3 states and 644 transitions. [2023-08-04 09:29:29,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 79 transitions, 380 flow [2023-08-04 09:29:29,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 79 transitions, 380 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:29:29,700 INFO L231 Difference]: Finished difference. Result has 67 places, 72 transitions, 232 flow [2023-08-04 09:29:29,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=431, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=232, PETRI_PLACES=67, PETRI_TRANSITIONS=72} [2023-08-04 09:29:29,702 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 2 predicate places. [2023-08-04 09:29:29,703 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 72 transitions, 232 flow [2023-08-04 09:29:29,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 194.66666666666666) internal successors, (584), 3 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:29:29,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:29:29,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:29:29,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 09:29:29,703 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:29:29,703 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:29:29,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1608163455, now seen corresponding path program 1 times [2023-08-04 09:29:29,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:29:29,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144693449] [2023-08-04 09:29:29,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:29:29,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:29:29,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:29:29,734 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 09:29:29,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:29:29,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144693449] [2023-08-04 09:29:29,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144693449] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:29:29,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924546323] [2023-08-04 09:29:29,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:29:29,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:29:29,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:29:29,735 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 09:29:29,737 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 09:29:29,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:29:29,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:29:29,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:29:29,811 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 09:29:29,811 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:29:29,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924546323] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:29:29,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:29:29,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:29:29,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448284486] [2023-08-04 09:29:29,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:29:29,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:29:29,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:29:29,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:29:29,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:29:29,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 431 [2023-08-04 09:29:29,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 72 transitions, 232 flow. Second operand has 3 states, 3 states have (on average 195.66666666666666) internal successors, (587), 3 states have internal predecessors, (587), 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 09:29:29,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:29:29,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 431 [2023-08-04 09:29:29,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:29:48,689 INFO L124 PetriNetUnfolderBase]: 193946/264415 cut-off events. [2023-08-04 09:29:48,690 INFO L125 PetriNetUnfolderBase]: For 33604/33604 co-relation queries the response was YES. [2023-08-04 09:29:49,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 523298 conditions, 264415 events. 193946/264415 cut-off events. For 33604/33604 co-relation queries the response was YES. Maximal size of possible extension queue 6329. Compared 1848301 event pairs, 110358 based on Foata normal form. 0/202215 useless extension candidates. Maximal degree in co-relation 523256. Up to 238510 conditions per place. [2023-08-04 09:29:50,292 INFO L140 encePairwiseOnDemand]: 428/431 looper letters, 71 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2023-08-04 09:29:50,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 83 transitions, 400 flow [2023-08-04 09:29:50,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:29:50,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:29:50,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 649 transitions. [2023-08-04 09:29:50,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5019334880123744 [2023-08-04 09:29:50,294 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 649 transitions. [2023-08-04 09:29:50,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 649 transitions. [2023-08-04 09:29:50,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:29:50,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 649 transitions. [2023-08-04 09:29:50,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 216.33333333333334) internal successors, (649), 3 states have internal predecessors, (649), 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 09:29:50,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 431.0) internal successors, (1724), 4 states have internal predecessors, (1724), 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 09:29:50,298 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 431.0) internal successors, (1724), 4 states have internal predecessors, (1724), 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 09:29:50,298 INFO L175 Difference]: Start difference. First operand has 67 places, 72 transitions, 232 flow. Second operand 3 states and 649 transitions. [2023-08-04 09:29:50,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 83 transitions, 400 flow [2023-08-04 09:29:50,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 83 transitions, 386 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 09:29:50,387 INFO L231 Difference]: Finished difference. Result has 63 places, 73 transitions, 230 flow [2023-08-04 09:29:50,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=431, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=230, PETRI_PLACES=63, PETRI_TRANSITIONS=73} [2023-08-04 09:29:50,388 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -2 predicate places. [2023-08-04 09:29:50,388 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 73 transitions, 230 flow [2023-08-04 09:29:50,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 195.66666666666666) internal successors, (587), 3 states have internal predecessors, (587), 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 09:29:50,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:29:50,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:29:50,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-04 09:29:50,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:29:50,590 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:29:50,591 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:29:50,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1461423840, now seen corresponding path program 1 times [2023-08-04 09:29:50,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:29:50,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758200409] [2023-08-04 09:29:50,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:29:50,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:29:50,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:29:50,655 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 09:29:50,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:29:50,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758200409] [2023-08-04 09:29:50,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758200409] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:29:50,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725583953] [2023-08-04 09:29:50,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:29:50,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:29:50,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:29:50,657 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:29:50,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 09:29:50,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:29:50,748 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:29:50,748 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:29:50,753 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 09:29:50,753 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:29:50,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725583953] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:29:50,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:29:50,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:29:50,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307436131] [2023-08-04 09:29:50,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:29:50,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:29:50,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:29:50,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:29:50,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:29:50,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 431 [2023-08-04 09:29:50,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 73 transitions, 230 flow. Second operand has 3 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 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 09:29:50,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:29:50,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 431 [2023-08-04 09:29:50,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:30:07,578 INFO L124 PetriNetUnfolderBase]: 193802/256468 cut-off events. [2023-08-04 09:30:07,578 INFO L125 PetriNetUnfolderBase]: For 14378/14378 co-relation queries the response was YES. [2023-08-04 09:30:08,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 515070 conditions, 256468 events. 193802/256468 cut-off events. For 14378/14378 co-relation queries the response was YES. Maximal size of possible extension queue 6359. Compared 1677283 event pairs, 120555 based on Foata normal form. 0/194601 useless extension candidates. Maximal degree in co-relation 177131. Up to 235303 conditions per place. [2023-08-04 09:30:09,242 INFO L140 encePairwiseOnDemand]: 428/431 looper letters, 77 selfloop transitions, 2 changer transitions 0/89 dead transitions. [2023-08-04 09:30:09,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 89 transitions, 420 flow [2023-08-04 09:30:09,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:30:09,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:30:09,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 654 transitions. [2023-08-04 09:30:09,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.505800464037123 [2023-08-04 09:30:09,244 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 654 transitions. [2023-08-04 09:30:09,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 654 transitions. [2023-08-04 09:30:09,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:30:09,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 654 transitions. [2023-08-04 09:30:09,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 218.0) internal successors, (654), 3 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:30:09,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 431.0) internal successors, (1724), 4 states have internal predecessors, (1724), 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 09:30:09,247 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 431.0) internal successors, (1724), 4 states have internal predecessors, (1724), 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 09:30:09,247 INFO L175 Difference]: Start difference. First operand has 63 places, 73 transitions, 230 flow. Second operand 3 states and 654 transitions. [2023-08-04 09:30:09,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 89 transitions, 420 flow [2023-08-04 09:30:09,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 89 transitions, 418 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:30:09,254 INFO L231 Difference]: Finished difference. Result has 65 places, 74 transitions, 240 flow [2023-08-04 09:30:09,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=431, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=240, PETRI_PLACES=65, PETRI_TRANSITIONS=74} [2023-08-04 09:30:09,255 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 0 predicate places. [2023-08-04 09:30:09,255 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 74 transitions, 240 flow [2023-08-04 09:30:09,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 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 09:30:09,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:30:09,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:30:09,270 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-04 09:30:09,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-04 09:30:09,460 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:30:09,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:30:09,461 INFO L85 PathProgramCache]: Analyzing trace with hash 360885642, now seen corresponding path program 1 times [2023-08-04 09:30:09,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:30:09,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043059608] [2023-08-04 09:30:09,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:30:09,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:30:09,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:30:09,494 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 09:30:09,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:30:09,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043059608] [2023-08-04 09:30:09,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043059608] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:30:09,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944554935] [2023-08-04 09:30:09,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:30:09,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:30:09,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:30:09,495 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:30:09,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 09:30:09,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:30:09,577 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:30:09,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:30:09,582 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 09:30:09,582 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:30:09,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944554935] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:30:09,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:30:09,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:30:09,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620339028] [2023-08-04 09:30:09,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:30:09,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:30:09,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:30:09,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:30:09,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:30:09,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 431 [2023-08-04 09:30:09,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 74 transitions, 240 flow. Second operand has 3 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 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 09:30:09,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:30:09,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 431 [2023-08-04 09:30:09,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:30:23,701 INFO L124 PetriNetUnfolderBase]: 171629/226816 cut-off events. [2023-08-04 09:30:23,701 INFO L125 PetriNetUnfolderBase]: For 13747/13747 co-relation queries the response was YES. [2023-08-04 09:30:24,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 462598 conditions, 226816 events. 171629/226816 cut-off events. For 13747/13747 co-relation queries the response was YES. Maximal size of possible extension queue 5386. Compared 1451529 event pairs, 97842 based on Foata normal form. 0/174837 useless extension candidates. Maximal degree in co-relation 171212. Up to 179764 conditions per place. [2023-08-04 09:30:25,273 INFO L140 encePairwiseOnDemand]: 428/431 looper letters, 86 selfloop transitions, 2 changer transitions 0/98 dead transitions. [2023-08-04 09:30:25,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 98 transitions, 479 flow [2023-08-04 09:30:25,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:30:25,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:30:25,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 662 transitions. [2023-08-04 09:30:25,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5119876256767208 [2023-08-04 09:30:25,282 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 662 transitions. [2023-08-04 09:30:25,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 662 transitions. [2023-08-04 09:30:25,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:30:25,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 662 transitions. [2023-08-04 09:30:25,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 220.66666666666666) internal successors, (662), 3 states have internal predecessors, (662), 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 09:30:25,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 431.0) internal successors, (1724), 4 states have internal predecessors, (1724), 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 09:30:25,286 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 431.0) internal successors, (1724), 4 states have internal predecessors, (1724), 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 09:30:25,286 INFO L175 Difference]: Start difference. First operand has 65 places, 74 transitions, 240 flow. Second operand 3 states and 662 transitions. [2023-08-04 09:30:25,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 98 transitions, 479 flow [2023-08-04 09:30:25,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 98 transitions, 477 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:30:25,313 INFO L231 Difference]: Finished difference. Result has 67 places, 75 transitions, 250 flow [2023-08-04 09:30:25,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=431, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=250, PETRI_PLACES=67, PETRI_TRANSITIONS=75} [2023-08-04 09:30:25,316 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 2 predicate places. [2023-08-04 09:30:25,316 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 75 transitions, 250 flow [2023-08-04 09:30:25,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 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 09:30:25,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:30:25,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:30:25,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-04 09:30:25,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:30:25,517 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:30:25,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:30:25,518 INFO L85 PathProgramCache]: Analyzing trace with hash 207187821, now seen corresponding path program 1 times [2023-08-04 09:30:25,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:30:25,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419880570] [2023-08-04 09:30:25,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:30:25,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:30:25,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:30:25,552 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 09:30:25,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:30:25,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419880570] [2023-08-04 09:30:25,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419880570] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:30:25,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013802047] [2023-08-04 09:30:25,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:30:25,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:30:25,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:30:25,568 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:30:25,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 09:30:25,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:30:25,654 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:30:25,655 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:30:25,662 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 09:30:25,662 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:30:25,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013802047] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:30:25,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:30:25,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:30:25,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926362091] [2023-08-04 09:30:25,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:30:25,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:30:25,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:30:25,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:30:25,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:30:25,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 431 [2023-08-04 09:30:25,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 75 transitions, 250 flow. Second operand has 3 states, 3 states have (on average 199.33333333333334) internal successors, (598), 3 states have internal predecessors, (598), 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 09:30:25,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:30:25,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 431 [2023-08-04 09:30:25,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:30:40,330 INFO L124 PetriNetUnfolderBase]: 159514/213589 cut-off events. [2023-08-04 09:30:40,330 INFO L125 PetriNetUnfolderBase]: For 26594/26594 co-relation queries the response was YES. [2023-08-04 09:30:40,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 448032 conditions, 213589 events. 159514/213589 cut-off events. For 26594/26594 co-relation queries the response was YES. Maximal size of possible extension queue 4289. Compared 1379498 event pairs, 89095 based on Foata normal form. 0/171310 useless extension candidates. Maximal degree in co-relation 175647. Up to 157456 conditions per place. [2023-08-04 09:30:41,487 INFO L140 encePairwiseOnDemand]: 428/431 looper letters, 87 selfloop transitions, 2 changer transitions 0/99 dead transitions. [2023-08-04 09:30:41,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 99 transitions, 491 flow [2023-08-04 09:30:41,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:30:41,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:30:41,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 662 transitions. [2023-08-04 09:30:41,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5119876256767208 [2023-08-04 09:30:41,495 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 662 transitions. [2023-08-04 09:30:41,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 662 transitions. [2023-08-04 09:30:41,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:30:41,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 662 transitions. [2023-08-04 09:30:41,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 220.66666666666666) internal successors, (662), 3 states have internal predecessors, (662), 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 09:30:41,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 431.0) internal successors, (1724), 4 states have internal predecessors, (1724), 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 09:30:41,508 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 431.0) internal successors, (1724), 4 states have internal predecessors, (1724), 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 09:30:41,508 INFO L175 Difference]: Start difference. First operand has 67 places, 75 transitions, 250 flow. Second operand 3 states and 662 transitions. [2023-08-04 09:30:41,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 99 transitions, 491 flow [2023-08-04 09:30:41,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 99 transitions, 489 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:30:41,840 INFO L231 Difference]: Finished difference. Result has 69 places, 76 transitions, 260 flow [2023-08-04 09:30:41,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=431, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=260, PETRI_PLACES=69, PETRI_TRANSITIONS=76} [2023-08-04 09:30:41,841 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 4 predicate places. [2023-08-04 09:30:41,841 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 76 transitions, 260 flow [2023-08-04 09:30:41,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 199.33333333333334) internal successors, (598), 3 states have internal predecessors, (598), 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 09:30:41,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:30:41,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:30:41,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 09:30:42,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 09:30:42,048 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:30:42,048 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:30:42,049 INFO L85 PathProgramCache]: Analyzing trace with hash 399922093, now seen corresponding path program 1 times [2023-08-04 09:30:42,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:30:42,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018025213] [2023-08-04 09:30:42,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:30:42,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:30:42,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:30:42,090 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 09:30:42,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:30:42,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018025213] [2023-08-04 09:30:42,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018025213] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:30:42,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426655515] [2023-08-04 09:30:42,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:30:42,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:30:42,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:30:42,106 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:30:42,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 09:30:42,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:30:42,189 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:30:42,190 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:30:42,194 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 09:30:42,194 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:30:42,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426655515] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:30:42,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:30:42,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:30:42,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457366353] [2023-08-04 09:30:42,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:30:42,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:30:42,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:30:42,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:30:42,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:30:42,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 431 [2023-08-04 09:30:42,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 76 transitions, 260 flow. Second operand has 3 states, 3 states have (on average 201.0) internal successors, (603), 3 states have internal predecessors, (603), 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 09:30:42,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:30:42,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 431 [2023-08-04 09:30:42,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:30:57,012 INFO L124 PetriNetUnfolderBase]: 158784/213340 cut-off events. [2023-08-04 09:30:57,029 INFO L125 PetriNetUnfolderBase]: For 28778/28778 co-relation queries the response was YES. [2023-08-04 09:30:57,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 455078 conditions, 213340 events. 158784/213340 cut-off events. For 28778/28778 co-relation queries the response was YES. Maximal size of possible extension queue 4192. Compared 1380624 event pairs, 102245 based on Foata normal form. 0/174353 useless extension candidates. Maximal degree in co-relation 246740. Up to 179679 conditions per place. [2023-08-04 09:30:58,498 INFO L140 encePairwiseOnDemand]: 428/431 looper letters, 88 selfloop transitions, 2 changer transitions 0/100 dead transitions. [2023-08-04 09:30:58,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 100 transitions, 503 flow [2023-08-04 09:30:58,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:30:58,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:30:58,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 662 transitions. [2023-08-04 09:30:58,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5119876256767208 [2023-08-04 09:30:58,500 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 662 transitions. [2023-08-04 09:30:58,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 662 transitions. [2023-08-04 09:30:58,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:30:58,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 662 transitions. [2023-08-04 09:30:58,514 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 220.66666666666666) internal successors, (662), 3 states have internal predecessors, (662), 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 09:30:58,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 431.0) internal successors, (1724), 4 states have internal predecessors, (1724), 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 09:30:58,516 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 431.0) internal successors, (1724), 4 states have internal predecessors, (1724), 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 09:30:58,516 INFO L175 Difference]: Start difference. First operand has 69 places, 76 transitions, 260 flow. Second operand 3 states and 662 transitions. [2023-08-04 09:30:58,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 100 transitions, 503 flow [2023-08-04 09:31:03,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 100 transitions, 501 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:31:03,623 INFO L231 Difference]: Finished difference. Result has 71 places, 77 transitions, 270 flow [2023-08-04 09:31:03,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=431, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=270, PETRI_PLACES=71, PETRI_TRANSITIONS=77} [2023-08-04 09:31:03,623 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 6 predicate places. [2023-08-04 09:31:03,623 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 77 transitions, 270 flow [2023-08-04 09:31:03,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 201.0) internal successors, (603), 3 states have internal predecessors, (603), 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 09:31:03,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:31:03,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:31:03,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-04 09:31:03,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 09:31:03,828 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:31:03,828 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:31:03,828 INFO L85 PathProgramCache]: Analyzing trace with hash -652027631, now seen corresponding path program 1 times [2023-08-04 09:31:03,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:31:03,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511124354] [2023-08-04 09:31:03,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:31:03,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:31:03,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:31:03,867 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 09:31:03,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:31:03,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511124354] [2023-08-04 09:31:03,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511124354] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:31:03,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943345214] [2023-08-04 09:31:03,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:31:03,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:31:03,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:31:03,882 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:31:03,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-04 09:31:03,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:31:03,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:31:03,971 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:31:03,981 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 09:31:03,981 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:31:03,992 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 09:31:03,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943345214] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:31:03,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:31:03,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:31:03,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601068836] [2023-08-04 09:31:03,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:31:03,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:31:03,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:31:03,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:31:03,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:31:04,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 431 [2023-08-04 09:31:04,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 77 transitions, 270 flow. Second operand has 5 states, 5 states have (on average 198.2) internal successors, (991), 5 states have internal predecessors, (991), 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 09:31:04,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:31:04,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 431 [2023-08-04 09:31:04,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:31:17,165 INFO L124 PetriNetUnfolderBase]: 148179/198085 cut-off events. [2023-08-04 09:31:17,166 INFO L125 PetriNetUnfolderBase]: For 25029/25029 co-relation queries the response was YES. [2023-08-04 09:31:17,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 425875 conditions, 198085 events. 148179/198085 cut-off events. For 25029/25029 co-relation queries the response was YES. Maximal size of possible extension queue 4117. Compared 1263265 event pairs, 69745 based on Foata normal form. 3/162434 useless extension candidates. Maximal degree in co-relation 360030. Up to 186032 conditions per place. [2023-08-04 09:31:18,668 INFO L140 encePairwiseOnDemand]: 427/431 looper letters, 74 selfloop transitions, 3 changer transitions 1/88 dead transitions. [2023-08-04 09:31:18,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 88 transitions, 448 flow [2023-08-04 09:31:18,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:31:18,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:31:18,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 838 transitions. [2023-08-04 09:31:18,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48607888631090485 [2023-08-04 09:31:18,670 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 838 transitions. [2023-08-04 09:31:18,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 838 transitions. [2023-08-04 09:31:18,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:31:18,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 838 transitions. [2023-08-04 09:31:18,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 209.5) internal successors, (838), 4 states have internal predecessors, (838), 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 09:31:18,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 431.0) internal successors, (2155), 5 states have internal predecessors, (2155), 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 09:31:18,673 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 431.0) internal successors, (2155), 5 states have internal predecessors, (2155), 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 09:31:18,673 INFO L175 Difference]: Start difference. First operand has 71 places, 77 transitions, 270 flow. Second operand 4 states and 838 transitions. [2023-08-04 09:31:18,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 88 transitions, 448 flow [2023-08-04 09:31:24,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 88 transitions, 446 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:31:24,609 INFO L231 Difference]: Finished difference. Result has 75 places, 77 transitions, 282 flow [2023-08-04 09:31:24,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=431, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=282, PETRI_PLACES=75, PETRI_TRANSITIONS=77} [2023-08-04 09:31:24,609 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 10 predicate places. [2023-08-04 09:31:24,609 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 77 transitions, 282 flow [2023-08-04 09:31:24,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 198.2) internal successors, (991), 5 states have internal predecessors, (991), 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 09:31:24,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:31:24,610 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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 09:31:24,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-04 09:31:24,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-04 09:31:24,816 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:31:24,817 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:31:24,817 INFO L85 PathProgramCache]: Analyzing trace with hash -737715304, now seen corresponding path program 1 times [2023-08-04 09:31:24,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:31:24,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153818785] [2023-08-04 09:31:24,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:31:24,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:31:24,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:31:24,868 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 09:31:24,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:31:24,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153818785] [2023-08-04 09:31:24,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153818785] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:31:24,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361273777] [2023-08-04 09:31:24,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:31:24,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:31:24,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:31:24,870 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:31:24,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-04 09:31:24,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:31:24,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 09:31:24,971 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:31:24,990 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 09:31:24,990 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:31:24,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361273777] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:31:24,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:31:24,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-08-04 09:31:24,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272039235] [2023-08-04 09:31:24,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:31:24,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 09:31:24,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:31:24,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 09:31:24,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-04 09:31:25,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 431 [2023-08-04 09:31:25,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 77 transitions, 282 flow. Second operand has 4 states, 4 states have (on average 198.5) internal successors, (794), 4 states have internal predecessors, (794), 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 09:31:25,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:31:25,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 431 [2023-08-04 09:31:25,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:31:39,542 INFO L124 PetriNetUnfolderBase]: 149504/199849 cut-off events. [2023-08-04 09:31:39,542 INFO L125 PetriNetUnfolderBase]: For 23433/23433 co-relation queries the response was YES. [2023-08-04 09:31:40,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 429059 conditions, 199849 events. 149504/199849 cut-off events. For 23433/23433 co-relation queries the response was YES. Maximal size of possible extension queue 4117. Compared 1271976 event pairs, 105997 based on Foata normal form. 360/164593 useless extension candidates. Maximal degree in co-relation 363907. Up to 186071 conditions per place. [2023-08-04 09:31:41,070 INFO L140 encePairwiseOnDemand]: 422/431 looper letters, 66 selfloop transitions, 2 changer transitions 28/106 dead transitions. [2023-08-04 09:31:41,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 106 transitions, 593 flow [2023-08-04 09:31:41,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:31:41,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:31:41,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 853 transitions. [2023-08-04 09:31:41,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4947795823665893 [2023-08-04 09:31:41,093 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 853 transitions. [2023-08-04 09:31:41,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 853 transitions. [2023-08-04 09:31:41,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:31:41,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 853 transitions. [2023-08-04 09:31:41,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 213.25) internal successors, (853), 4 states have internal predecessors, (853), 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 09:31:41,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 431.0) internal successors, (2155), 5 states have internal predecessors, (2155), 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 09:31:41,096 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 431.0) internal successors, (2155), 5 states have internal predecessors, (2155), 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 09:31:41,097 INFO L175 Difference]: Start difference. First operand has 75 places, 77 transitions, 282 flow. Second operand 4 states and 853 transitions. [2023-08-04 09:31:41,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 106 transitions, 593 flow [2023-08-04 09:31:45,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 106 transitions, 576 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 09:31:45,254 INFO L231 Difference]: Finished difference. Result has 77 places, 78 transitions, 296 flow [2023-08-04 09:31:45,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=431, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=296, PETRI_PLACES=77, PETRI_TRANSITIONS=78} [2023-08-04 09:31:45,255 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 12 predicate places. [2023-08-04 09:31:45,255 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 78 transitions, 296 flow [2023-08-04 09:31:45,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 198.5) internal successors, (794), 4 states have internal predecessors, (794), 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 09:31:45,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:31:45,256 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:31:45,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-04 09:31:45,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-04 09:31:45,462 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:31:45,462 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:31:45,462 INFO L85 PathProgramCache]: Analyzing trace with hash 19804091, now seen corresponding path program 1 times [2023-08-04 09:31:45,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:31:45,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774365345] [2023-08-04 09:31:45,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:31:45,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:31:45,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:31:45,547 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 09:31:45,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:31:45,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774365345] [2023-08-04 09:31:45,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774365345] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:31:45,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753386256] [2023-08-04 09:31:45,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:31:45,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:31:45,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:31:45,562 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:31:45,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-04 09:31:45,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:31:45,713 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-04 09:31:45,714 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:31:45,778 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 09:31:45,778 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:31:45,837 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 09:31:45,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753386256] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:31:45,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:31:45,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 11 [2023-08-04 09:31:45,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115045003] [2023-08-04 09:31:45,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:31:45,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-04 09:31:45,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:31:45,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-04 09:31:45,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-08-04 09:31:45,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 431 [2023-08-04 09:31:45,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 78 transitions, 296 flow. Second operand has 11 states, 11 states have (on average 186.54545454545453) internal successors, (2052), 11 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 09:31:45,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:31:45,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 431 [2023-08-04 09:31:45,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:31:59,537 INFO L124 PetriNetUnfolderBase]: 143594/191188 cut-off events. [2023-08-04 09:31:59,538 INFO L125 PetriNetUnfolderBase]: For 68845/68845 co-relation queries the response was YES. [2023-08-04 09:32:00,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 457840 conditions, 191188 events. 143594/191188 cut-off events. For 68845/68845 co-relation queries the response was YES. Maximal size of possible extension queue 4071. Compared 1198206 event pairs, 66675 based on Foata normal form. 2491/193087 useless extension candidates. Maximal degree in co-relation 457816. Up to 174236 conditions per place. [2023-08-04 09:32:00,879 INFO L140 encePairwiseOnDemand]: 418/431 looper letters, 85 selfloop transitions, 6 changer transitions 105/206 dead transitions. [2023-08-04 09:32:00,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 206 transitions, 1101 flow [2023-08-04 09:32:00,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-04 09:32:00,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-04 09:32:00,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2377 transitions. [2023-08-04 09:32:00,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45959010054137667 [2023-08-04 09:32:00,883 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2377 transitions. [2023-08-04 09:32:00,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2377 transitions. [2023-08-04 09:32:00,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:32:00,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2377 transitions. [2023-08-04 09:32:00,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 198.08333333333334) internal successors, (2377), 12 states have internal predecessors, (2377), 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 09:32:00,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 431.0) internal successors, (5603), 13 states have internal predecessors, (5603), 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 09:32:00,892 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 431.0) internal successors, (5603), 13 states have internal predecessors, (5603), 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 09:32:00,892 INFO L175 Difference]: Start difference. First operand has 77 places, 78 transitions, 296 flow. Second operand 12 states and 2377 transitions. [2023-08-04 09:32:00,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 206 transitions, 1101 flow [2023-08-04 09:32:04,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 206 transitions, 1097 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 09:32:04,398 INFO L231 Difference]: Finished difference. Result has 95 places, 79 transitions, 384 flow [2023-08-04 09:32:04,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=431, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=384, PETRI_PLACES=95, PETRI_TRANSITIONS=79} [2023-08-04 09:32:04,399 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 30 predicate places. [2023-08-04 09:32:04,399 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 79 transitions, 384 flow [2023-08-04 09:32:04,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 186.54545454545453) internal successors, (2052), 11 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 09:32:04,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:32:04,400 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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 09:32:04,404 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-08-04 09:32:04,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:32:04,604 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:32:04,605 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:32:04,605 INFO L85 PathProgramCache]: Analyzing trace with hash 741050636, now seen corresponding path program 1 times [2023-08-04 09:32:04,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:32:04,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426096171] [2023-08-04 09:32:04,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:32:04,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:32:04,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:32:04,654 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 09:32:04,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:32:04,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426096171] [2023-08-04 09:32:04,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426096171] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:32:04,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672853197] [2023-08-04 09:32:04,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:32:04,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:32:04,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:32:04,655 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:32:04,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-04 09:32:04,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:32:04,793 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-04 09:32:04,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:32:04,882 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 09:32:04,882 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:32:05,043 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 09:32:05,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672853197] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:32:05,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:32:05,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 15 [2023-08-04 09:32:05,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386421877] [2023-08-04 09:32:05,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:32:05,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-04 09:32:05,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:32:05,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-04 09:32:05,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2023-08-04 09:32:05,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 431 [2023-08-04 09:32:05,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 79 transitions, 384 flow. Second operand has 15 states, 15 states have (on average 186.0) internal successors, (2790), 15 states have internal predecessors, (2790), 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 09:32:05,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:32:05,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 431 [2023-08-04 09:32:05,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:32:29,434 INFO L124 PetriNetUnfolderBase]: 211211/282293 cut-off events. [2023-08-04 09:32:29,434 INFO L125 PetriNetUnfolderBase]: For 1550882/1550882 co-relation queries the response was YES. [2023-08-04 09:32:30,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 893881 conditions, 282293 events. 211211/282293 cut-off events. For 1550882/1550882 co-relation queries the response was YES. Maximal size of possible extension queue 6368. Compared 1871894 event pairs, 82404 based on Foata normal form. 25684/307481 useless extension candidates. Maximal degree in co-relation 760286. Up to 156344 conditions per place. [2023-08-04 09:32:32,272 INFO L140 encePairwiseOnDemand]: 418/431 looper letters, 258 selfloop transitions, 46 changer transitions 9/323 dead transitions. [2023-08-04 09:32:32,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 323 transitions, 2316 flow [2023-08-04 09:32:32,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-04 09:32:32,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-04 09:32:32,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3212 transitions. [2023-08-04 09:32:32,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4657772621809745 [2023-08-04 09:32:32,285 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3212 transitions. [2023-08-04 09:32:32,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3212 transitions. [2023-08-04 09:32:32,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:32:32,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3212 transitions. [2023-08-04 09:32:32,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 200.75) internal successors, (3212), 16 states have internal predecessors, (3212), 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 09:32:32,310 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 431.0) internal successors, (7327), 17 states have internal predecessors, (7327), 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 09:32:32,311 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 431.0) internal successors, (7327), 17 states have internal predecessors, (7327), 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 09:32:32,311 INFO L175 Difference]: Start difference. First operand has 95 places, 79 transitions, 384 flow. Second operand 16 states and 3212 transitions. [2023-08-04 09:32:32,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 323 transitions, 2316 flow [2023-08-04 09:32:43,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 323 transitions, 1853 flow, removed 216 selfloop flow, removed 9 redundant places. [2023-08-04 09:32:43,953 INFO L231 Difference]: Finished difference. Result has 106 places, 127 transitions, 834 flow [2023-08-04 09:32:43,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=431, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=834, PETRI_PLACES=106, PETRI_TRANSITIONS=127} [2023-08-04 09:32:43,953 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 41 predicate places. [2023-08-04 09:32:43,953 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 127 transitions, 834 flow [2023-08-04 09:32:43,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 186.0) internal successors, (2790), 15 states have internal predecessors, (2790), 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 09:32:43,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:32:43,954 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 09:32:43,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-04 09:32:44,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-04 09:32:44,155 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:32:44,156 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:32:44,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1711198770, now seen corresponding path program 1 times [2023-08-04 09:32:44,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:32:44,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731248372] [2023-08-04 09:32:44,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:32:44,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:32:44,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:32:44,289 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-08-04 09:32:44,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:32:44,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731248372] [2023-08-04 09:32:44,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731248372] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:32:44,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266465982] [2023-08-04 09:32:44,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:32:44,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:32:44,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:32:44,314 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:32:44,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-04 09:32:44,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:32:44,427 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:32:44,428 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:32:44,436 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-08-04 09:32:44,437 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:32:44,446 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-08-04 09:32:44,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266465982] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:32:44,446 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:32:44,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:32:44,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408530169] [2023-08-04 09:32:44,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:32:44,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:32:44,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:32:44,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:32:44,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:32:44,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 431 [2023-08-04 09:32:44,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 127 transitions, 834 flow. Second operand has 5 states, 5 states have (on average 199.0) internal successors, (995), 5 states have internal predecessors, (995), 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 09:32:44,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:32:44,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 431 [2023-08-04 09:32:44,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:33:00,216 INFO L124 PetriNetUnfolderBase]: 127748/172449 cut-off events. [2023-08-04 09:33:00,216 INFO L125 PetriNetUnfolderBase]: For 465947/465947 co-relation queries the response was YES. [2023-08-04 09:33:01,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 529622 conditions, 172449 events. 127748/172449 cut-off events. For 465947/465947 co-relation queries the response was YES. Maximal size of possible extension queue 3206. Compared 1095261 event pairs, 39285 based on Foata normal form. 2514/174686 useless extension candidates. Maximal degree in co-relation 501079. Up to 81830 conditions per place. [2023-08-04 09:33:01,786 INFO L140 encePairwiseOnDemand]: 427/431 looper letters, 160 selfloop transitions, 4 changer transitions 9/183 dead transitions. [2023-08-04 09:33:01,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 183 transitions, 1521 flow [2023-08-04 09:33:01,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:33:01,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:33:01,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 867 transitions. [2023-08-04 09:33:01,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5029002320185615 [2023-08-04 09:33:01,788 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 867 transitions. [2023-08-04 09:33:01,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 867 transitions. [2023-08-04 09:33:01,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:33:01,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 867 transitions. [2023-08-04 09:33:01,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 216.75) internal successors, (867), 4 states have internal predecessors, (867), 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 09:33:01,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 431.0) internal successors, (2155), 5 states have internal predecessors, (2155), 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 09:33:01,791 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 431.0) internal successors, (2155), 5 states have internal predecessors, (2155), 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 09:33:01,791 INFO L175 Difference]: Start difference. First operand has 106 places, 127 transitions, 834 flow. Second operand 4 states and 867 transitions. [2023-08-04 09:33:01,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 183 transitions, 1521 flow [2023-08-04 09:33:06,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 183 transitions, 1328 flow, removed 88 selfloop flow, removed 5 redundant places. [2023-08-04 09:33:06,201 INFO L231 Difference]: Finished difference. Result has 106 places, 123 transitions, 669 flow [2023-08-04 09:33:06,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=431, PETRI_DIFFERENCE_MINUEND_FLOW=682, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=669, PETRI_PLACES=106, PETRI_TRANSITIONS=123} [2023-08-04 09:33:06,202 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 41 predicate places. [2023-08-04 09:33:06,202 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 123 transitions, 669 flow [2023-08-04 09:33:06,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 199.0) internal successors, (995), 5 states have internal predecessors, (995), 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 09:33:06,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:33:06,202 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 09:33:06,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-04 09:33:06,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:33:06,406 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:33:06,407 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:33:06,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1060314635, now seen corresponding path program 1 times [2023-08-04 09:33:06,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:33:06,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507257972] [2023-08-04 09:33:06,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:33:06,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:33:06,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:33:06,483 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-04 09:33:06,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:33:06,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507257972] [2023-08-04 09:33:06,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507257972] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:33:06,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016872574] [2023-08-04 09:33:06,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:33:06,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:33:06,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:33:06,485 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:33:06,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-04 09:33:06,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:33:06,606 INFO L262 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-04 09:33:06,608 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:33:06,745 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 09:33:06,745 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:33:06,890 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 09:33:06,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016872574] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:33:06,891 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:33:06,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 9, 9] total 19 [2023-08-04 09:33:06,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521933422] [2023-08-04 09:33:06,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:33:06,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-04 09:33:06,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:33:06,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-04 09:33:06,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2023-08-04 09:33:07,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 431 [2023-08-04 09:33:07,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 123 transitions, 669 flow. Second operand has 19 states, 19 states have (on average 186.1578947368421) internal successors, (3537), 19 states have internal predecessors, (3537), 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 09:33:07,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:33:07,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 431 [2023-08-04 09:33:07,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:33:35,569 INFO L124 PetriNetUnfolderBase]: 217474/292978 cut-off events. [2023-08-04 09:33:35,569 INFO L125 PetriNetUnfolderBase]: For 755544/755544 co-relation queries the response was YES. [2023-08-04 09:33:37,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 895115 conditions, 292978 events. 217474/292978 cut-off events. For 755544/755544 co-relation queries the response was YES. Maximal size of possible extension queue 5887. Compared 1993611 event pairs, 55132 based on Foata normal form. 17438/307733 useless extension candidates. Maximal degree in co-relation 889304. Up to 75766 conditions per place. [2023-08-04 09:33:38,336 INFO L140 encePairwiseOnDemand]: 418/431 looper letters, 324 selfloop transitions, 60 changer transitions 171/565 dead transitions. [2023-08-04 09:33:38,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 565 transitions, 3946 flow [2023-08-04 09:33:38,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-04 09:33:38,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-04 09:33:38,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4294 transitions. [2023-08-04 09:33:38,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47442271572201966 [2023-08-04 09:33:38,344 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4294 transitions. [2023-08-04 09:33:38,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4294 transitions. [2023-08-04 09:33:38,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:33:38,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4294 transitions. [2023-08-04 09:33:38,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 204.47619047619048) internal successors, (4294), 21 states have internal predecessors, (4294), 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 09:33:38,360 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 431.0) internal successors, (9482), 22 states have internal predecessors, (9482), 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 09:33:38,361 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 431.0) internal successors, (9482), 22 states have internal predecessors, (9482), 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 09:33:38,361 INFO L175 Difference]: Start difference. First operand has 106 places, 123 transitions, 669 flow. Second operand 21 states and 4294 transitions. [2023-08-04 09:33:38,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 565 transitions, 3946 flow [2023-08-04 09:33:49,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 565 transitions, 3924 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-04 09:33:49,958 INFO L231 Difference]: Finished difference. Result has 136 places, 150 transitions, 1083 flow [2023-08-04 09:33:49,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=431, PETRI_DIFFERENCE_MINUEND_FLOW=665, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1083, PETRI_PLACES=136, PETRI_TRANSITIONS=150} [2023-08-04 09:33:49,959 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 71 predicate places. [2023-08-04 09:33:49,959 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 150 transitions, 1083 flow [2023-08-04 09:33:49,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 186.1578947368421) internal successors, (3537), 19 states have internal predecessors, (3537), 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 09:33:49,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:33:49,960 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 09:33:49,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-04 09:33:50,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:33:50,165 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:33:50,165 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:33:50,165 INFO L85 PathProgramCache]: Analyzing trace with hash 498137203, now seen corresponding path program 1 times [2023-08-04 09:33:50,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:33:50,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088419670] [2023-08-04 09:33:50,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:33:50,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:33:50,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:33:50,234 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-08-04 09:33:50,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:33:50,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088419670] [2023-08-04 09:33:50,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088419670] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:33:50,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308813468] [2023-08-04 09:33:50,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:33:50,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:33:50,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:33:50,235 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:33:50,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-04 09:33:50,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:33:50,363 INFO L262 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:33:50,363 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:33:50,372 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-08-04 09:33:50,372 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:33:50,381 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-08-04 09:33:50,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308813468] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:33:50,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:33:50,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 09:33:50,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386777464] [2023-08-04 09:33:50,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:33:50,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:33:50,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:33:50,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:33:50,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:33:50,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 431 [2023-08-04 09:33:50,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 150 transitions, 1083 flow. Second operand has 5 states, 5 states have (on average 200.2) internal successors, (1001), 5 states have internal predecessors, (1001), 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 09:33:50,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:33:50,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 431 [2023-08-04 09:33:50,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:34:08,617 INFO L124 PetriNetUnfolderBase]: 127006/171705 cut-off events. [2023-08-04 09:34:08,617 INFO L125 PetriNetUnfolderBase]: For 794275/794275 co-relation queries the response was YES. [2023-08-04 09:34:10,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 628584 conditions, 171705 events. 127006/171705 cut-off events. For 794275/794275 co-relation queries the response was YES. Maximal size of possible extension queue 3586. Compared 1098515 event pairs, 79018 based on Foata normal form. 27/171236 useless extension candidates. Maximal degree in co-relation 622106. Up to 160169 conditions per place. [2023-08-04 09:34:10,546 INFO L140 encePairwiseOnDemand]: 427/431 looper letters, 123 selfloop transitions, 3 changer transitions 58/194 dead transitions. [2023-08-04 09:34:10,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 194 transitions, 1695 flow [2023-08-04 09:34:10,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:34:10,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:34:10,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 867 transitions. [2023-08-04 09:34:10,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5029002320185615 [2023-08-04 09:34:10,548 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 867 transitions. [2023-08-04 09:34:10,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 867 transitions. [2023-08-04 09:34:10,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:34:10,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 867 transitions. [2023-08-04 09:34:10,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 216.75) internal successors, (867), 4 states have internal predecessors, (867), 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 09:34:10,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 431.0) internal successors, (2155), 5 states have internal predecessors, (2155), 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 09:34:10,551 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 431.0) internal successors, (2155), 5 states have internal predecessors, (2155), 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 09:34:10,551 INFO L175 Difference]: Start difference. First operand has 136 places, 150 transitions, 1083 flow. Second operand 4 states and 867 transitions. [2023-08-04 09:34:10,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 194 transitions, 1695 flow [2023-08-04 09:34:20,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 194 transitions, 1583 flow, removed 50 selfloop flow, removed 12 redundant places. [2023-08-04 09:34:20,921 INFO L231 Difference]: Finished difference. Result has 115 places, 97 transitions, 528 flow [2023-08-04 09:34:20,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=431, PETRI_DIFFERENCE_MINUEND_FLOW=995, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=528, PETRI_PLACES=115, PETRI_TRANSITIONS=97} [2023-08-04 09:34:20,922 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 50 predicate places. [2023-08-04 09:34:20,922 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 97 transitions, 528 flow [2023-08-04 09:34:20,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 200.2) internal successors, (1001), 5 states have internal predecessors, (1001), 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 09:34:20,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:34:20,931 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 09:34:20,939 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-08-04 09:34:21,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:34:21,137 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:34:21,138 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:34:21,138 INFO L85 PathProgramCache]: Analyzing trace with hash -922157652, now seen corresponding path program 1 times [2023-08-04 09:34:21,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:34:21,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764461669] [2023-08-04 09:34:21,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:34:21,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:34:21,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:34:21,436 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 09:34:21,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:34:21,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764461669] [2023-08-04 09:34:21,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764461669] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:34:21,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:34:21,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-04 09:34:21,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396915261] [2023-08-04 09:34:21,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:34:21,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-04 09:34:21,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:34:21,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-04 09:34:21,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-04 09:34:21,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 431 [2023-08-04 09:34:21,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 97 transitions, 528 flow. Second operand has 7 states, 7 states have (on average 198.85714285714286) internal successors, (1392), 7 states have internal predecessors, (1392), 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 09:34:21,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:34:21,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 431 [2023-08-04 09:34:21,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:34:37,508 INFO L124 PetriNetUnfolderBase]: 126389/167567 cut-off events. [2023-08-04 09:34:37,508 INFO L125 PetriNetUnfolderBase]: For 367978/367978 co-relation queries the response was YES. [2023-08-04 09:34:38,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 509664 conditions, 167567 events. 126389/167567 cut-off events. For 367978/367978 co-relation queries the response was YES. Maximal size of possible extension queue 3994. Compared 1065633 event pairs, 7184 based on Foata normal form. 8987/174415 useless extension candidates. Maximal degree in co-relation 509597. Up to 58372 conditions per place. [2023-08-04 09:34:39,318 INFO L140 encePairwiseOnDemand]: 424/431 looper letters, 209 selfloop transitions, 61 changer transitions 27/307 dead transitions. [2023-08-04 09:34:39,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 307 transitions, 2333 flow [2023-08-04 09:34:39,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-04 09:34:39,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-04 09:34:39,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1559 transitions. [2023-08-04 09:34:39,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5167384819356977 [2023-08-04 09:34:39,320 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1559 transitions. [2023-08-04 09:34:39,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1559 transitions. [2023-08-04 09:34:39,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:34:39,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1559 transitions. [2023-08-04 09:34:39,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 222.71428571428572) internal successors, (1559), 7 states have internal predecessors, (1559), 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 09:34:39,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 431.0) internal successors, (3448), 8 states have internal predecessors, (3448), 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 09:34:39,324 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 431.0) internal successors, (3448), 8 states have internal predecessors, (3448), 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 09:34:39,324 INFO L175 Difference]: Start difference. First operand has 115 places, 97 transitions, 528 flow. Second operand 7 states and 1559 transitions. [2023-08-04 09:34:39,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 307 transitions, 2333 flow [2023-08-04 09:34:45,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 307 transitions, 2186 flow, removed 65 selfloop flow, removed 9 redundant places. [2023-08-04 09:34:45,202 INFO L231 Difference]: Finished difference. Result has 104 places, 153 transitions, 1022 flow [2023-08-04 09:34:45,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=431, PETRI_DIFFERENCE_MINUEND_FLOW=488, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1022, PETRI_PLACES=104, PETRI_TRANSITIONS=153} [2023-08-04 09:34:45,202 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 39 predicate places. [2023-08-04 09:34:45,202 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 153 transitions, 1022 flow [2023-08-04 09:34:45,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 198.85714285714286) internal successors, (1392), 7 states have internal predecessors, (1392), 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 09:34:45,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:34:45,203 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 09:34:45,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-04 09:34:45,203 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:34:45,203 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:34:45,203 INFO L85 PathProgramCache]: Analyzing trace with hash -505638830, now seen corresponding path program 1 times [2023-08-04 09:34:45,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:34:45,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106803381] [2023-08-04 09:34:45,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:34:45,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:34:45,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:34:46,418 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-04 09:34:46,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:34:46,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106803381] [2023-08-04 09:34:46,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106803381] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:34:46,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295341456] [2023-08-04 09:34:46,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:34:46,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:34:46,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:34:46,429 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:34:46,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-04 09:34:46,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:34:46,554 INFO L262 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-04 09:34:46,556 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:34:47,310 INFO L322 Elim1Store]: treesize reduction 42, result has 14.3 percent of original size [2023-08-04 09:34:47,310 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 23 [2023-08-04 09:34:47,504 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-04 09:34:47,504 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:34:48,043 INFO L322 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2023-08-04 09:34:48,043 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 50 [2023-08-04 09:34:49,448 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-04 09:34:49,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295341456] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:34:49,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:34:49,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 48 [2023-08-04 09:34:49,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354768739] [2023-08-04 09:34:49,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:34:49,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-08-04 09:34:49,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:34:49,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-08-04 09:34:49,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=2052, Unknown=0, NotChecked=0, Total=2352 [2023-08-04 09:34:51,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 431 [2023-08-04 09:34:51,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 153 transitions, 1022 flow. Second operand has 49 states, 49 states have (on average 153.44897959183675) internal successors, (7519), 49 states have internal predecessors, (7519), 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 09:34:51,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:34:51,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 431 [2023-08-04 09:34:51,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand