/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-bad-dot-product-alt.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 09:04:11,935 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 09:04:11,969 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 09:04:11,971 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 09:04:11,972 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 09:04:11,972 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 09:04:11,972 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 09:04:11,989 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 09:04:11,990 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 09:04:11,990 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 09:04:11,990 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 09:04:11,991 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 09:04:11,991 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 09:04:11,991 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 09:04:11,992 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 09:04:11,992 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 09:04:11,992 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 09:04:11,995 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 09:04:11,996 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 09:04:11,996 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 09:04:11,999 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 09:04:11,999 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 09:04:11,999 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 09:04:12,000 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 09:04:12,001 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 09:04:12,001 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 09:04:12,001 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 09:04:12,001 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 09:04:12,001 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 09:04:12,002 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 09:04:12,002 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:04:12,003 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 09:04:12,003 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 09:04:12,003 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 09:04:12,003 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 09:04:12,003 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 09:04:12,003 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 09:04:12,003 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 09:04:12,004 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 09:04:12,004 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 09:04:12,004 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 09:04:12,004 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 09:04:12,199 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 09:04:12,214 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 09:04:12,216 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 09:04:12,217 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 09:04:12,218 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 09:04:12,218 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-bad-dot-product-alt.wvr_bound2.c [2023-08-04 09:04:13,199 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 09:04:13,392 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 09:04:13,392 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-bad-dot-product-alt.wvr_bound2.c [2023-08-04 09:04:13,399 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a53a68e2a/cedc7ab555214cae82d5d456b5db94a6/FLAG3c08ae8ca [2023-08-04 09:04:13,412 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a53a68e2a/cedc7ab555214cae82d5d456b5db94a6 [2023-08-04 09:04:13,414 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 09:04:13,415 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 09:04:13,416 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 09:04:13,416 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 09:04:13,420 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 09:04:13,420 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:04:13" (1/1) ... [2023-08-04 09:04:13,421 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@713a8b07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:04:13, skipping insertion in model container [2023-08-04 09:04:13,421 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:04:13" (1/1) ... [2023-08-04 09:04:13,441 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 09:04:13,601 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-bad-dot-product-alt.wvr_bound2.c[3425,3438] [2023-08-04 09:04:13,605 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:04:13,611 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 09:04:13,645 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-bad-dot-product-alt.wvr_bound2.c[3425,3438] [2023-08-04 09:04:13,648 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:04:13,657 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:04:13,657 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:04:13,662 INFO L206 MainTranslator]: Completed translation [2023-08-04 09:04:13,662 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:04:13 WrapperNode [2023-08-04 09:04:13,662 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 09:04:13,663 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 09:04:13,663 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 09:04:13,663 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 09:04:13,667 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:04:13" (1/1) ... [2023-08-04 09:04:13,688 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:04:13" (1/1) ... [2023-08-04 09:04:13,726 INFO L138 Inliner]: procedures = 28, calls = 74, calls flagged for inlining = 18, calls inlined = 26, statements flattened = 417 [2023-08-04 09:04:13,726 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 09:04:13,727 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 09:04:13,727 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 09:04:13,727 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 09:04:13,733 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:04:13" (1/1) ... [2023-08-04 09:04:13,733 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:04:13" (1/1) ... [2023-08-04 09:04:13,736 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:04:13" (1/1) ... [2023-08-04 09:04:13,736 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:04:13" (1/1) ... [2023-08-04 09:04:13,750 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:04:13" (1/1) ... [2023-08-04 09:04:13,758 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:04:13" (1/1) ... [2023-08-04 09:04:13,759 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:04:13" (1/1) ... [2023-08-04 09:04:13,760 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:04:13" (1/1) ... [2023-08-04 09:04:13,764 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 09:04:13,765 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 09:04:13,765 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 09:04:13,765 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 09:04:13,766 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:04:13" (1/1) ... [2023-08-04 09:04:13,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:04:13,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:04:13,792 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 09:04:13,800 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 09:04:13,825 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 09:04:13,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-08-04 09:04:13,825 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 09:04:13,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 09:04:13,825 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 09:04:13,826 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-08-04 09:04:13,826 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 09:04:13,826 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 09:04:13,826 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 09:04:13,827 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 09:04:13,827 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 09:04:13,827 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 09:04:13,827 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 09:04:13,828 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 09:04:13,828 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 09:04:13,828 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 09:04:13,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 09:04:13,828 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 09:04:13,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 09:04:13,830 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 09:04:13,945 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 09:04:13,962 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 09:04:14,344 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 09:04:14,441 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 09:04:14,441 INFO L302 CfgBuilder]: Removed 13 assume(true) statements. [2023-08-04 09:04:14,443 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:04:14 BoogieIcfgContainer [2023-08-04 09:04:14,443 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 09:04:14,444 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 09:04:14,444 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 09:04:14,447 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 09:04:14,447 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 09:04:13" (1/3) ... [2023-08-04 09:04:14,447 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2231c918 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:04:14, skipping insertion in model container [2023-08-04 09:04:14,447 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:04:13" (2/3) ... [2023-08-04 09:04:14,447 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2231c918 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:04:14, skipping insertion in model container [2023-08-04 09:04:14,448 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:04:14" (3/3) ... [2023-08-04 09:04:14,448 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-bad-dot-product-alt.wvr_bound2.c [2023-08-04 09:04:14,454 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 09:04:14,460 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 09:04:14,460 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 09:04:14,460 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 09:04:14,572 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 09:04:14,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 335 places, 378 transitions, 798 flow [2023-08-04 09:04:14,756 INFO L124 PetriNetUnfolderBase]: 140/962 cut-off events. [2023-08-04 09:04:14,757 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:04:14,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1023 conditions, 962 events. 140/962 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 5223 event pairs, 0 based on Foata normal form. 0/812 useless extension candidates. Maximal degree in co-relation 571. Up to 16 conditions per place. [2023-08-04 09:04:14,770 INFO L82 GeneralOperation]: Start removeDead. Operand has 335 places, 378 transitions, 798 flow [2023-08-04 09:04:14,783 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 335 places, 378 transitions, 798 flow [2023-08-04 09:04:14,785 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:04:14,790 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 335 places, 378 transitions, 798 flow [2023-08-04 09:04:14,792 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 335 places, 378 transitions, 798 flow [2023-08-04 09:04:14,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 335 places, 378 transitions, 798 flow [2023-08-04 09:04:14,912 INFO L124 PetriNetUnfolderBase]: 140/962 cut-off events. [2023-08-04 09:04:14,912 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:04:14,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1023 conditions, 962 events. 140/962 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 5223 event pairs, 0 based on Foata normal form. 0/812 useless extension candidates. Maximal degree in co-relation 571. Up to 16 conditions per place. [2023-08-04 09:04:14,935 INFO L119 LiptonReduction]: Number of co-enabled transitions 27144 [2023-08-04 09:04:24,067 INFO L134 LiptonReduction]: Checked pairs total: 40297 [2023-08-04 09:04:24,067 INFO L136 LiptonReduction]: Total number of compositions: 392 [2023-08-04 09:04:24,080 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:04:24,084 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;@3215c3bb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:04:24,084 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:04:24,088 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:04:24,089 INFO L124 PetriNetUnfolderBase]: 5/43 cut-off events. [2023-08-04 09:04:24,089 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:04:24,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:04:24,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:04:24,090 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:04:24,093 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:04:24,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1751020016, now seen corresponding path program 1 times [2023-08-04 09:04:24,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:04:24,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991814277] [2023-08-04 09:04:24,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:04:24,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:04:24,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:04:24,343 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 09:04:24,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:04:24,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991814277] [2023-08-04 09:04:24,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991814277] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:04:24,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:04:24,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:04:24,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310253370] [2023-08-04 09:04:24,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:04:24,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:04:24,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:04:24,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:04:24,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:04:24,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 333 out of 770 [2023-08-04 09:04:24,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 71 transitions, 184 flow. Second operand has 3 states, 3 states have (on average 336.3333333333333) internal successors, (1009), 3 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:04:24,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:04:24,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 333 of 770 [2023-08-04 09:04:24,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:04:26,160 INFO L124 PetriNetUnfolderBase]: 18330/24458 cut-off events. [2023-08-04 09:04:26,160 INFO L125 PetriNetUnfolderBase]: For 1181/1181 co-relation queries the response was YES. [2023-08-04 09:04:26,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49169 conditions, 24458 events. 18330/24458 cut-off events. For 1181/1181 co-relation queries the response was YES. Maximal size of possible extension queue 944. Compared 132237 event pairs, 8286 based on Foata normal form. 0/16335 useless extension candidates. Maximal degree in co-relation 44266. Up to 23857 conditions per place. [2023-08-04 09:04:26,290 INFO L140 encePairwiseOnDemand]: 764/770 looper letters, 64 selfloop transitions, 2 changer transitions 4/76 dead transitions. [2023-08-04 09:04:26,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 76 transitions, 328 flow [2023-08-04 09:04:26,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:04:26,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:04:26,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1070 transitions. [2023-08-04 09:04:26,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46320346320346323 [2023-08-04 09:04:26,309 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1070 transitions. [2023-08-04 09:04:26,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1070 transitions. [2023-08-04 09:04:26,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:04:26,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1070 transitions. [2023-08-04 09:04:26,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 356.6666666666667) internal successors, (1070), 3 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:04:26,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 770.0) internal successors, (3080), 4 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:04:26,327 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 770.0) internal successors, (3080), 4 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:04:26,329 INFO L175 Difference]: Start difference. First operand has 58 places, 71 transitions, 184 flow. Second operand 3 states and 1070 transitions. [2023-08-04 09:04:26,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 76 transitions, 328 flow [2023-08-04 09:04:26,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 76 transitions, 328 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:04:26,337 INFO L231 Difference]: Finished difference. Result has 60 places, 65 transitions, 174 flow [2023-08-04 09:04:26,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=60, PETRI_TRANSITIONS=65} [2023-08-04 09:04:26,341 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 2 predicate places. [2023-08-04 09:04:26,341 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 65 transitions, 174 flow [2023-08-04 09:04:26,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 336.3333333333333) internal successors, (1009), 3 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:04:26,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:04:26,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:04:26,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 09:04:26,343 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:04:26,344 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:04:26,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1881657490, now seen corresponding path program 1 times [2023-08-04 09:04:26,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:04:26,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56445604] [2023-08-04 09:04:26,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:04:26,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:04:26,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:04:26,470 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 09:04:26,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:04:26,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56445604] [2023-08-04 09:04:26,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56445604] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:04:26,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780047981] [2023-08-04 09:04:26,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:04:26,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:04:26,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:04:26,474 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 09:04:26,480 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 09:04:26,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:04:26,570 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:04:26,573 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:04:26,585 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 09:04:26,586 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:04:26,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780047981] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:04:26,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:04:26,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:04:26,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118281058] [2023-08-04 09:04:26,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:04:26,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:04:26,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:04:26,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:04:26,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:04:26,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 333 out of 770 [2023-08-04 09:04:26,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 65 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 337.3333333333333) internal successors, (1012), 3 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:04:26,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:04:26,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 333 of 770 [2023-08-04 09:04:26,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:04:28,294 INFO L124 PetriNetUnfolderBase]: 17791/23609 cut-off events. [2023-08-04 09:04:28,294 INFO L125 PetriNetUnfolderBase]: For 959/959 co-relation queries the response was YES. [2023-08-04 09:04:28,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47473 conditions, 23609 events. 17791/23609 cut-off events. For 959/959 co-relation queries the response was YES. Maximal size of possible extension queue 971. Compared 127198 event pairs, 8149 based on Foata normal form. 0/15750 useless extension candidates. Maximal degree in co-relation 42550. Up to 23013 conditions per place. [2023-08-04 09:04:28,483 INFO L140 encePairwiseOnDemand]: 767/770 looper letters, 70 selfloop transitions, 2 changer transitions 1/79 dead transitions. [2023-08-04 09:04:28,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 79 transitions, 348 flow [2023-08-04 09:04:28,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:04:28,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:04:28,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1073 transitions. [2023-08-04 09:04:28,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4645021645021645 [2023-08-04 09:04:28,490 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1073 transitions. [2023-08-04 09:04:28,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1073 transitions. [2023-08-04 09:04:28,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:04:28,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1073 transitions. [2023-08-04 09:04:28,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 357.6666666666667) internal successors, (1073), 3 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:04:28,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 770.0) internal successors, (3080), 4 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:04:28,497 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 770.0) internal successors, (3080), 4 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:04:28,497 INFO L175 Difference]: Start difference. First operand has 60 places, 65 transitions, 174 flow. Second operand 3 states and 1073 transitions. [2023-08-04 09:04:28,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 79 transitions, 348 flow [2023-08-04 09:04:28,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 79 transitions, 332 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-04 09:04:28,505 INFO L231 Difference]: Finished difference. Result has 55 places, 65 transitions, 166 flow [2023-08-04 09:04:28,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=55, PETRI_TRANSITIONS=65} [2023-08-04 09:04:28,506 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -3 predicate places. [2023-08-04 09:04:28,506 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 65 transitions, 166 flow [2023-08-04 09:04:28,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 337.3333333333333) internal successors, (1012), 3 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:04:28,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:04:28,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:04:28,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 09:04:28,713 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 09:04:28,714 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:04:28,714 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:04:28,714 INFO L85 PathProgramCache]: Analyzing trace with hash -273709743, now seen corresponding path program 1 times [2023-08-04 09:04:28,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:04:28,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335518916] [2023-08-04 09:04:28,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:04:28,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:04:28,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:04:28,781 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 09:04:28,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:04:28,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335518916] [2023-08-04 09:04:28,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335518916] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:04:28,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747558181] [2023-08-04 09:04:28,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:04:28,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:04:28,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:04:28,785 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 09:04:28,816 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 09:04:28,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:04:28,887 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:04:28,889 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:04:28,899 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 09:04:28,899 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:04:28,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747558181] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:04:28,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:04:28,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:04:28,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338150181] [2023-08-04 09:04:28,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:04:28,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:04:28,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:04:28,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:04:28,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:04:28,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 333 out of 770 [2023-08-04 09:04:28,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 65 transitions, 166 flow. Second operand has 3 states, 3 states have (on average 338.3333333333333) internal successors, (1015), 3 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:04:28,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:04:28,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 333 of 770 [2023-08-04 09:04:28,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:04:30,383 INFO L124 PetriNetUnfolderBase]: 17702/23600 cut-off events. [2023-08-04 09:04:30,383 INFO L125 PetriNetUnfolderBase]: For 143/143 co-relation queries the response was YES. [2023-08-04 09:04:30,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47448 conditions, 23600 events. 17702/23600 cut-off events. For 143/143 co-relation queries the response was YES. Maximal size of possible extension queue 985. Compared 129983 event pairs, 7878 based on Foata normal form. 0/15894 useless extension candidates. Maximal degree in co-relation 31032. Up to 21611 conditions per place. [2023-08-04 09:04:30,447 INFO L140 encePairwiseOnDemand]: 767/770 looper letters, 77 selfloop transitions, 2 changer transitions 1/86 dead transitions. [2023-08-04 09:04:30,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 86 transitions, 368 flow [2023-08-04 09:04:30,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:04:30,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:04:30,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1080 transitions. [2023-08-04 09:04:30,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675324675324675 [2023-08-04 09:04:30,449 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1080 transitions. [2023-08-04 09:04:30,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1080 transitions. [2023-08-04 09:04:30,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:04:30,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1080 transitions. [2023-08-04 09:04:30,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 360.0) internal successors, (1080), 3 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:04:30,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 770.0) internal successors, (3080), 4 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:04:30,456 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 770.0) internal successors, (3080), 4 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:04:30,456 INFO L175 Difference]: Start difference. First operand has 55 places, 65 transitions, 166 flow. Second operand 3 states and 1080 transitions. [2023-08-04 09:04:30,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 86 transitions, 368 flow [2023-08-04 09:04:30,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 86 transitions, 364 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:04:30,458 INFO L231 Difference]: Finished difference. Result has 56 places, 65 transitions, 170 flow [2023-08-04 09:04:30,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=56, PETRI_TRANSITIONS=65} [2023-08-04 09:04:30,458 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -2 predicate places. [2023-08-04 09:04:30,458 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 65 transitions, 170 flow [2023-08-04 09:04:30,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 338.3333333333333) internal successors, (1015), 3 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:04:30,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:04:30,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:04:30,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 09:04:30,672 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 09:04:30,673 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:04:30,673 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:04:30,673 INFO L85 PathProgramCache]: Analyzing trace with hash -2074255205, now seen corresponding path program 1 times [2023-08-04 09:04:30,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:04:30,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709162445] [2023-08-04 09:04:30,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:04:30,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:04:30,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:04:30,731 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 09:04:30,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:04:30,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709162445] [2023-08-04 09:04:30,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709162445] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:04:30,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492022563] [2023-08-04 09:04:30,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:04:30,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:04:30,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:04:30,733 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 09:04:30,735 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 09:04:30,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:04:30,834 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:04:30,836 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:04:30,843 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 09:04:30,844 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:04:30,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492022563] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:04:30,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:04:30,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:04:30,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237262487] [2023-08-04 09:04:30,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:04:30,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:04:30,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:04:30,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:04:30,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:04:30,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 333 out of 770 [2023-08-04 09:04:30,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 65 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 339.3333333333333) internal successors, (1018), 3 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:04:30,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:04:30,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 333 of 770 [2023-08-04 09:04:30,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:04:31,727 INFO L124 PetriNetUnfolderBase]: 10118/13728 cut-off events. [2023-08-04 09:04:31,728 INFO L125 PetriNetUnfolderBase]: For 673/673 co-relation queries the response was YES. [2023-08-04 09:04:31,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28662 conditions, 13728 events. 10118/13728 cut-off events. For 673/673 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 71305 event pairs, 4586 based on Foata normal form. 0/9783 useless extension candidates. Maximal degree in co-relation 18082. Up to 9617 conditions per place. [2023-08-04 09:04:31,763 INFO L140 encePairwiseOnDemand]: 767/770 looper letters, 82 selfloop transitions, 2 changer transitions 0/90 dead transitions. [2023-08-04 09:04:31,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 90 transitions, 394 flow [2023-08-04 09:04:31,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:04:31,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:04:31,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1084 transitions. [2023-08-04 09:04:31,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4692640692640693 [2023-08-04 09:04:31,766 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1084 transitions. [2023-08-04 09:04:31,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1084 transitions. [2023-08-04 09:04:31,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:04:31,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1084 transitions. [2023-08-04 09:04:31,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 361.3333333333333) internal successors, (1084), 3 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:04:31,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 770.0) internal successors, (3080), 4 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:04:31,772 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 770.0) internal successors, (3080), 4 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:04:31,773 INFO L175 Difference]: Start difference. First operand has 56 places, 65 transitions, 170 flow. Second operand 3 states and 1084 transitions. [2023-08-04 09:04:31,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 90 transitions, 394 flow [2023-08-04 09:04:31,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 90 transitions, 390 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:04:31,775 INFO L231 Difference]: Finished difference. Result has 57 places, 66 transitions, 178 flow [2023-08-04 09:04:31,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=57, PETRI_TRANSITIONS=66} [2023-08-04 09:04:31,776 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -1 predicate places. [2023-08-04 09:04:31,776 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 66 transitions, 178 flow [2023-08-04 09:04:31,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 339.3333333333333) internal successors, (1018), 3 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:04:31,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:04:31,777 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] [2023-08-04 09:04:31,781 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-04 09:04:31,981 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 09:04:31,982 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:04:31,982 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:04:31,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1539876738, now seen corresponding path program 1 times [2023-08-04 09:04:31,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:04:31,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166125758] [2023-08-04 09:04:31,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:04:31,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:04:32,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:04:32,055 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 09:04:32,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:04:32,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166125758] [2023-08-04 09:04:32,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166125758] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:04:32,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552876828] [2023-08-04 09:04:32,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:04:32,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:04:32,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:04:32,059 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 09:04:32,059 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 09:04:32,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:04:32,167 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:04:32,168 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:04:32,178 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 09:04:32,179 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:04:32,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552876828] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:04:32,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:04:32,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:04:32,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561211806] [2023-08-04 09:04:32,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:04:32,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:04:32,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:04:32,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:04:32,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:04:32,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 333 out of 770 [2023-08-04 09:04:32,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 66 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 340.6666666666667) internal successors, (1022), 3 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:04:32,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:04:32,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 333 of 770 [2023-08-04 09:04:32,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:04:33,046 INFO L124 PetriNetUnfolderBase]: 8950/12123 cut-off events. [2023-08-04 09:04:33,046 INFO L125 PetriNetUnfolderBase]: For 1535/1535 co-relation queries the response was YES. [2023-08-04 09:04:33,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25905 conditions, 12123 events. 8950/12123 cut-off events. For 1535/1535 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 61087 event pairs, 5328 based on Foata normal form. 0/9045 useless extension candidates. Maximal degree in co-relation 16723. Up to 10669 conditions per place. [2023-08-04 09:04:33,085 INFO L140 encePairwiseOnDemand]: 767/770 looper letters, 83 selfloop transitions, 2 changer transitions 0/91 dead transitions. [2023-08-04 09:04:33,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 91 transitions, 404 flow [2023-08-04 09:04:33,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:04:33,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:04:33,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1084 transitions. [2023-08-04 09:04:33,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4692640692640693 [2023-08-04 09:04:33,088 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1084 transitions. [2023-08-04 09:04:33,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1084 transitions. [2023-08-04 09:04:33,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:04:33,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1084 transitions. [2023-08-04 09:04:33,091 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 361.3333333333333) internal successors, (1084), 3 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:04:33,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 770.0) internal successors, (3080), 4 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:04:33,095 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 770.0) internal successors, (3080), 4 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:04:33,095 INFO L175 Difference]: Start difference. First operand has 57 places, 66 transitions, 178 flow. Second operand 3 states and 1084 transitions. [2023-08-04 09:04:33,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 91 transitions, 404 flow [2023-08-04 09:04:33,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 91 transitions, 402 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:04:33,122 INFO L231 Difference]: Finished difference. Result has 59 places, 67 transitions, 188 flow [2023-08-04 09:04:33,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=188, PETRI_PLACES=59, PETRI_TRANSITIONS=67} [2023-08-04 09:04:33,123 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 1 predicate places. [2023-08-04 09:04:33,123 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 67 transitions, 188 flow [2023-08-04 09:04:33,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 340.6666666666667) internal successors, (1022), 3 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:04:33,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:04:33,124 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] [2023-08-04 09:04:33,129 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 09:04:33,329 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 09:04:33,329 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:04:33,329 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:04:33,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1706405415, now seen corresponding path program 1 times [2023-08-04 09:04:33,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:04:33,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735835995] [2023-08-04 09:04:33,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:04:33,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:04:33,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:04:33,377 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 09:04:33,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:04:33,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735835995] [2023-08-04 09:04:33,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735835995] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:04:33,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154941399] [2023-08-04 09:04:33,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:04:33,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:04:33,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:04:33,379 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 09:04:33,381 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 09:04:33,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:04:33,483 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:04:33,485 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:04:33,493 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 09:04:33,493 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:04:33,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154941399] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:04:33,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:04:33,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:04:33,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113316288] [2023-08-04 09:04:33,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:04:33,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:04:33,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:04:33,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:04:33,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:04:33,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 333 out of 770 [2023-08-04 09:04:33,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 67 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 342.0) internal successors, (1026), 3 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:04:33,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:04:33,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 333 of 770 [2023-08-04 09:04:33,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:04:34,336 INFO L124 PetriNetUnfolderBase]: 8922/12076 cut-off events. [2023-08-04 09:04:34,336 INFO L125 PetriNetUnfolderBase]: For 1034/1034 co-relation queries the response was YES. [2023-08-04 09:04:34,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25901 conditions, 12076 events. 8922/12076 cut-off events. For 1034/1034 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 60707 event pairs, 5833 based on Foata normal form. 0/9050 useless extension candidates. Maximal degree in co-relation 22558. Up to 11741 conditions per place. [2023-08-04 09:04:34,370 INFO L140 encePairwiseOnDemand]: 767/770 looper letters, 77 selfloop transitions, 2 changer transitions 3/88 dead transitions. [2023-08-04 09:04:34,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 88 transitions, 394 flow [2023-08-04 09:04:34,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:04:34,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:04:34,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1080 transitions. [2023-08-04 09:04:34,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675324675324675 [2023-08-04 09:04:34,373 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1080 transitions. [2023-08-04 09:04:34,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1080 transitions. [2023-08-04 09:04:34,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:04:34,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1080 transitions. [2023-08-04 09:04:34,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 360.0) internal successors, (1080), 3 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:04:34,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 770.0) internal successors, (3080), 4 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:04:34,379 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 770.0) internal successors, (3080), 4 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:04:34,379 INFO L175 Difference]: Start difference. First operand has 59 places, 67 transitions, 188 flow. Second operand 3 states and 1080 transitions. [2023-08-04 09:04:34,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 88 transitions, 394 flow [2023-08-04 09:04:34,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 88 transitions, 392 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:04:34,416 INFO L231 Difference]: Finished difference. Result has 61 places, 65 transitions, 186 flow [2023-08-04 09:04:34,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=61, PETRI_TRANSITIONS=65} [2023-08-04 09:04:34,417 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 3 predicate places. [2023-08-04 09:04:34,417 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 65 transitions, 186 flow [2023-08-04 09:04:34,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 342.0) internal successors, (1026), 3 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:04:34,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:04:34,418 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 09:04:34,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 09:04:34,622 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 09:04:34,623 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:04:34,623 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:04:34,623 INFO L85 PathProgramCache]: Analyzing trace with hash -419715726, now seen corresponding path program 1 times [2023-08-04 09:04:34,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:04:34,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843532006] [2023-08-04 09:04:34,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:04:34,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:04:34,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:04:34,684 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 09:04:34,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:04:34,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843532006] [2023-08-04 09:04:34,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843532006] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:04:34,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152250978] [2023-08-04 09:04:34,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:04:34,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:04:34,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:04:34,687 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 09:04:34,703 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 09:04:34,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:04:34,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:04:34,791 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:04:34,815 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 09:04:34,816 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:04:34,829 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 09:04:34,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152250978] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:04:34,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:04:34,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:04:34,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420936213] [2023-08-04 09:04:34,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:04:34,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:04:34,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:04:34,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:04:34,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:04:34,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 332 out of 770 [2023-08-04 09:04:34,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 65 transitions, 186 flow. Second operand has 5 states, 5 states have (on average 339.2) internal successors, (1696), 5 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:04:34,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:04:34,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 332 of 770 [2023-08-04 09:04:34,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:04:34,880 INFO L124 PetriNetUnfolderBase]: 23/50 cut-off events. [2023-08-04 09:04:34,881 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 09:04:34,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118 conditions, 50 events. 23/50 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 90 event pairs, 1 based on Foata normal form. 7/46 useless extension candidates. Maximal degree in co-relation 106. Up to 31 conditions per place. [2023-08-04 09:04:34,881 INFO L140 encePairwiseOnDemand]: 767/770 looper letters, 0 selfloop transitions, 0 changer transitions 28/28 dead transitions. [2023-08-04 09:04:34,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 28 transitions, 114 flow [2023-08-04 09:04:34,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:04:34,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:04:34,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1356 transitions. [2023-08-04 09:04:34,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44025974025974024 [2023-08-04 09:04:34,883 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1356 transitions. [2023-08-04 09:04:34,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1356 transitions. [2023-08-04 09:04:34,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:04:34,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1356 transitions. [2023-08-04 09:04:34,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:04:34,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 770.0) internal successors, (3850), 5 states have internal predecessors, (3850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:04:34,889 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 770.0) internal successors, (3850), 5 states have internal predecessors, (3850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:04:34,889 INFO L175 Difference]: Start difference. First operand has 61 places, 65 transitions, 186 flow. Second operand 4 states and 1356 transitions. [2023-08-04 09:04:34,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 28 transitions, 114 flow [2023-08-04 09:04:34,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 28 transitions, 112 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:04:34,890 INFO L231 Difference]: Finished difference. Result has 27 places, 0 transitions, 0 flow [2023-08-04 09:04:34,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=770, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=27, PETRI_TRANSITIONS=0} [2023-08-04 09:04:34,890 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -31 predicate places. [2023-08-04 09:04:34,890 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 0 transitions, 0 flow [2023-08-04 09:04:34,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 339.2) internal successors, (1696), 5 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:04:34,892 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 09:04:34,903 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 09:04:35,097 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 09:04:35,100 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:04:35,101 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 09:04:35,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 335 places, 378 transitions, 798 flow [2023-08-04 09:04:35,196 INFO L124 PetriNetUnfolderBase]: 140/962 cut-off events. [2023-08-04 09:04:35,196 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:04:35,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1023 conditions, 962 events. 140/962 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 5223 event pairs, 0 based on Foata normal form. 0/812 useless extension candidates. Maximal degree in co-relation 571. Up to 16 conditions per place. [2023-08-04 09:04:35,202 INFO L82 GeneralOperation]: Start removeDead. Operand has 335 places, 378 transitions, 798 flow [2023-08-04 09:04:35,221 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 335 places, 378 transitions, 798 flow [2023-08-04 09:04:35,221 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:04:35,221 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 335 places, 378 transitions, 798 flow [2023-08-04 09:04:35,221 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 335 places, 378 transitions, 798 flow [2023-08-04 09:04:35,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 335 places, 378 transitions, 798 flow [2023-08-04 09:04:35,310 INFO L124 PetriNetUnfolderBase]: 140/962 cut-off events. [2023-08-04 09:04:35,310 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:04:35,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1023 conditions, 962 events. 140/962 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 5223 event pairs, 0 based on Foata normal form. 0/812 useless extension candidates. Maximal degree in co-relation 571. Up to 16 conditions per place. [2023-08-04 09:04:35,331 INFO L119 LiptonReduction]: Number of co-enabled transitions 27144 [2023-08-04 09:04:44,498 INFO L134 LiptonReduction]: Checked pairs total: 40192 [2023-08-04 09:04:44,498 INFO L136 LiptonReduction]: Total number of compositions: 387 [2023-08-04 09:04:44,500 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 09:04:44,500 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;@3215c3bb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:04:44,500 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 09:04:44,505 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:04:44,505 INFO L124 PetriNetUnfolderBase]: 5/40 cut-off events. [2023-08-04 09:04:44,505 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:04:44,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:04:44,505 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:04:44,505 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 09:04:44,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:04:44,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1636206755, now seen corresponding path program 1 times [2023-08-04 09:04:44,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:04:44,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869300005] [2023-08-04 09:04:44,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:04:44,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:04:44,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:04:44,625 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 09:04:44,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:04:44,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869300005] [2023-08-04 09:04:44,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869300005] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:04:44,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:04:44,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:04:44,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099072172] [2023-08-04 09:04:44,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:04:44,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 09:04:44,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:04:44,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 09:04:44,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 09:04:44,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 321 out of 765 [2023-08-04 09:04:44,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 71 transitions, 184 flow. Second operand has 4 states, 4 states have (on average 322.75) internal successors, (1291), 4 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:04:44,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:04:44,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 321 of 765 [2023-08-04 09:04:44,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:04:46,286 INFO L124 PetriNetUnfolderBase]: 18846/25227 cut-off events. [2023-08-04 09:04:46,286 INFO L125 PetriNetUnfolderBase]: For 1332/1332 co-relation queries the response was YES. [2023-08-04 09:04:46,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50653 conditions, 25227 events. 18846/25227 cut-off events. For 1332/1332 co-relation queries the response was YES. Maximal size of possible extension queue 943. Compared 137637 event pairs, 12048 based on Foata normal form. 0/16890 useless extension candidates. Maximal degree in co-relation 44309. Up to 24596 conditions per place. [2023-08-04 09:04:46,348 INFO L140 encePairwiseOnDemand]: 756/765 looper letters, 38 selfloop transitions, 4 changer transitions 29/77 dead transitions. [2023-08-04 09:04:46,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 77 transitions, 332 flow [2023-08-04 09:04:46,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:04:46,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:04:46,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1356 transitions. [2023-08-04 09:04:46,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44313725490196076 [2023-08-04 09:04:46,351 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1356 transitions. [2023-08-04 09:04:46,351 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1356 transitions. [2023-08-04 09:04:46,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:04:46,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1356 transitions. [2023-08-04 09:04:46,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:04:46,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 765.0) internal successors, (3825), 5 states have internal predecessors, (3825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:04:46,357 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 765.0) internal successors, (3825), 5 states have internal predecessors, (3825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:04:46,357 INFO L175 Difference]: Start difference. First operand has 58 places, 71 transitions, 184 flow. Second operand 4 states and 1356 transitions. [2023-08-04 09:04:46,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 77 transitions, 332 flow [2023-08-04 09:04:46,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 77 transitions, 332 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:04:46,360 INFO L231 Difference]: Finished difference. Result has 62 places, 48 transitions, 131 flow [2023-08-04 09:04:46,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=765, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=131, PETRI_PLACES=62, PETRI_TRANSITIONS=48} [2023-08-04 09:04:46,361 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 4 predicate places. [2023-08-04 09:04:46,361 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 48 transitions, 131 flow [2023-08-04 09:04:46,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 322.75) internal successors, (1291), 4 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:04:46,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:04:46,361 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:04:46,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 09:04:46,361 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 09:04:46,362 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:04:46,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1659973389, now seen corresponding path program 1 times [2023-08-04 09:04:46,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:04:46,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126172362] [2023-08-04 09:04:46,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:04:46,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:04:46,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:04:46,399 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 09:04:46,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:04:46,439 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 09:04:46,439 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 09:04:46,440 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 09:04:46,440 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 09:04:46,440 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 09:04:46,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 09:04:46,440 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 09:04:46,440 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 09:04:46,441 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 09:04:46,441 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 09:04:46,474 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 09:04:46,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 443 places, 507 transitions, 1104 flow [2023-08-04 09:04:47,161 INFO L124 PetriNetUnfolderBase]: 1006/5002 cut-off events. [2023-08-04 09:04:47,161 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 09:04:47,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5676 conditions, 5002 events. 1006/5002 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 42045 event pairs, 11 based on Foata normal form. 0/4240 useless extension candidates. Maximal degree in co-relation 3058. Up to 192 conditions per place. [2023-08-04 09:04:47,219 INFO L82 GeneralOperation]: Start removeDead. Operand has 443 places, 507 transitions, 1104 flow [2023-08-04 09:04:47,243 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 443 places, 507 transitions, 1104 flow [2023-08-04 09:04:47,243 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:04:47,243 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 443 places, 507 transitions, 1104 flow [2023-08-04 09:04:47,243 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 443 places, 507 transitions, 1104 flow [2023-08-04 09:04:47,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 443 places, 507 transitions, 1104 flow [2023-08-04 09:04:47,866 INFO L124 PetriNetUnfolderBase]: 1006/5002 cut-off events. [2023-08-04 09:04:47,866 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 09:04:47,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5676 conditions, 5002 events. 1006/5002 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 42045 event pairs, 11 based on Foata normal form. 0/4240 useless extension candidates. Maximal degree in co-relation 3058. Up to 192 conditions per place. [2023-08-04 09:04:48,166 INFO L119 LiptonReduction]: Number of co-enabled transitions 86580 [2023-08-04 09:04:59,693 INFO L134 LiptonReduction]: Checked pairs total: 151980 [2023-08-04 09:04:59,693 INFO L136 LiptonReduction]: Total number of compositions: 512 [2023-08-04 09:04:59,695 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:04:59,695 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;@3215c3bb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:04:59,695 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:04:59,697 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:04:59,697 INFO L124 PetriNetUnfolderBase]: 4/38 cut-off events. [2023-08-04 09:04:59,698 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 09:04:59,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:04:59,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:04:59,698 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:04:59,698 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:04:59,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1926035786, now seen corresponding path program 1 times [2023-08-04 09:04:59,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:04:59,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104563440] [2023-08-04 09:04:59,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:04:59,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:04:59,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:04:59,724 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 09:04:59,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:04:59,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104563440] [2023-08-04 09:04:59,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104563440] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:04:59,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:04:59,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:04:59,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521833009] [2023-08-04 09:04:59,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:04:59,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:04:59,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:04:59,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:04:59,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:04:59,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 441 out of 1019 [2023-08-04 09:04:59,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 110 transitions, 310 flow. Second operand has 3 states, 3 states have (on average 444.3333333333333) internal successors, (1333), 3 states have internal predecessors, (1333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:04:59,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:04:59,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 441 of 1019 [2023-08-04 09:04:59,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand