/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 INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-multiply-verify.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 03:08:43,871 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 03:08:43,918 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 03:08:43,922 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 03:08:43,923 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 03:08:43,923 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 03:08:43,924 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 03:08:43,942 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 03:08:43,943 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 03:08:43,943 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 03:08:43,943 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 03:08:43,944 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 03:08:43,944 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 03:08:43,945 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 03:08:43,945 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 03:08:43,945 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 03:08:43,946 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 03:08:43,946 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 03:08:43,946 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 03:08:43,947 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 03:08:43,947 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 03:08:43,947 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 03:08:43,948 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 03:08:43,948 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 03:08:43,948 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 03:08:43,949 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 03:08:43,949 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 03:08:43,949 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 03:08:43,950 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 03:08:43,950 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 03:08:43,950 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 03:08:43,951 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 03:08:43,951 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 03:08:43,951 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 03:08:43,951 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 03:08:43,952 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 03:08:43,952 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 03:08:43,952 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 03:08:43,952 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 03:08:43,953 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 03:08:43,953 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 03:08:43,959 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 03:08:44,150 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 03:08:44,177 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 03:08:44,180 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 03:08:44,181 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 03:08:44,181 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 03:08:44,182 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-multiply-verify.wvr_bound2.c [2023-08-04 03:08:45,371 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 03:08:45,565 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 03:08:45,565 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-multiply-verify.wvr_bound2.c [2023-08-04 03:08:45,573 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45c30cc0e/dcfd6d29b0f949a2ae3cfa984622f0a7/FLAGd3db3642a [2023-08-04 03:08:45,951 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45c30cc0e/dcfd6d29b0f949a2ae3cfa984622f0a7 [2023-08-04 03:08:45,955 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 03:08:45,956 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 03:08:45,957 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 03:08:45,957 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 03:08:45,960 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 03:08:45,961 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 03:08:45" (1/1) ... [2023-08-04 03:08:45,961 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11753d5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:08:45, skipping insertion in model container [2023-08-04 03:08:45,962 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 03:08:45" (1/1) ... [2023-08-04 03:08:45,989 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 03:08:46,159 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-multiply-verify.wvr_bound2.c[3285,3298] [2023-08-04 03:08:46,163 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 03:08:46,171 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 03:08:46,194 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-multiply-verify.wvr_bound2.c[3285,3298] [2023-08-04 03:08:46,197 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 03:08:46,204 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 03:08:46,204 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 03:08:46,210 INFO L206 MainTranslator]: Completed translation [2023-08-04 03:08:46,210 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:08:46 WrapperNode [2023-08-04 03:08:46,210 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 03:08:46,211 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 03:08:46,211 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 03:08:46,212 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 03:08:46,217 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:08:46" (1/1) ... [2023-08-04 03:08:46,225 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:08:46" (1/1) ... [2023-08-04 03:08:46,248 INFO L138 Inliner]: procedures = 26, calls = 50, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 232 [2023-08-04 03:08:46,249 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 03:08:46,249 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 03:08:46,250 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 03:08:46,250 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 03:08:46,257 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:08:46" (1/1) ... [2023-08-04 03:08:46,257 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:08:46" (1/1) ... [2023-08-04 03:08:46,260 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:08:46" (1/1) ... [2023-08-04 03:08:46,260 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:08:46" (1/1) ... [2023-08-04 03:08:46,267 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:08:46" (1/1) ... [2023-08-04 03:08:46,274 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:08:46" (1/1) ... [2023-08-04 03:08:46,276 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:08:46" (1/1) ... [2023-08-04 03:08:46,277 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:08:46" (1/1) ... [2023-08-04 03:08:46,280 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 03:08:46,280 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 03:08:46,281 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 03:08:46,281 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 03:08:46,281 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:08:46" (1/1) ... [2023-08-04 03:08:46,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 03:08:46,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:08:46,334 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 03:08:46,356 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 03:08:46,373 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 03:08:46,374 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 03:08:46,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 03:08:46,374 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 03:08:46,374 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 03:08:46,374 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 03:08:46,374 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 03:08:46,374 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 03:08:46,374 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 03:08:46,374 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 03:08:46,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 03:08:46,374 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 03:08:46,375 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 03:08:46,375 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 03:08:46,375 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 03:08:46,375 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 03:08:46,375 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 03:08:46,377 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 03:08:46,473 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 03:08:46,475 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 03:08:46,753 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 03:08:46,885 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 03:08:46,886 INFO L302 CfgBuilder]: Removed 9 assume(true) statements. [2023-08-04 03:08:46,888 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 03:08:46 BoogieIcfgContainer [2023-08-04 03:08:46,888 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 03:08:46,891 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 03:08:46,892 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 03:08:46,895 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 03:08:46,895 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 03:08:45" (1/3) ... [2023-08-04 03:08:46,897 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b43aac2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 03:08:46, skipping insertion in model container [2023-08-04 03:08:46,897 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:08:46" (2/3) ... [2023-08-04 03:08:46,898 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b43aac2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 03:08:46, skipping insertion in model container [2023-08-04 03:08:46,898 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 03:08:46" (3/3) ... [2023-08-04 03:08:46,899 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-more-multiply-verify.wvr_bound2.c [2023-08-04 03:08:46,906 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 03:08:46,915 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 03:08:46,915 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 03:08:46,915 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 03:08:47,003 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 03:08:47,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 197 transitions, 436 flow [2023-08-04 03:08:47,189 INFO L124 PetriNetUnfolderBase]: 92/661 cut-off events. [2023-08-04 03:08:47,189 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 03:08:47,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 722 conditions, 661 events. 92/661 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3345 event pairs, 0 based on Foata normal form. 0/559 useless extension candidates. Maximal degree in co-relation 394. Up to 16 conditions per place. [2023-08-04 03:08:47,200 INFO L82 GeneralOperation]: Start removeDead. Operand has 180 places, 197 transitions, 436 flow [2023-08-04 03:08:47,211 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 180 places, 197 transitions, 436 flow [2023-08-04 03:08:47,214 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:08:47,228 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 180 places, 197 transitions, 436 flow [2023-08-04 03:08:47,232 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 180 places, 197 transitions, 436 flow [2023-08-04 03:08:47,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 197 transitions, 436 flow [2023-08-04 03:08:47,320 INFO L124 PetriNetUnfolderBase]: 92/661 cut-off events. [2023-08-04 03:08:47,321 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 03:08:47,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 722 conditions, 661 events. 92/661 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3345 event pairs, 0 based on Foata normal form. 0/559 useless extension candidates. Maximal degree in co-relation 394. Up to 16 conditions per place. [2023-08-04 03:08:47,336 INFO L119 LiptonReduction]: Number of co-enabled transitions 5712 [2023-08-04 03:08:52,366 INFO L134 LiptonReduction]: Checked pairs total: 11406 [2023-08-04 03:08:52,366 INFO L136 LiptonReduction]: Total number of compositions: 168 [2023-08-04 03:08:52,380 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 03:08:52,385 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;@51f3e2d1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:08:52,386 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 03:08:52,390 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:08:52,391 INFO L124 PetriNetUnfolderBase]: 3/32 cut-off events. [2023-08-04 03:08:52,391 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 03:08:52,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:08:52,392 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-04 03:08:52,392 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:08:52,396 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:08:52,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1986514109, now seen corresponding path program 1 times [2023-08-04 03:08:52,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:08:52,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995320693] [2023-08-04 03:08:52,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:08:52,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:08:52,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 03:08:52,512 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 03:08:52,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 03:08:52,603 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 03:08:52,606 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 03:08:52,607 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 03:08:52,609 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 03:08:52,609 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 03:08:52,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 03:08:52,610 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 03:08:52,617 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-04 03:08:52,618 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 03:08:52,618 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 03:08:52,662 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 03:08:52,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 217 places, 241 transitions, 572 flow [2023-08-04 03:08:53,251 INFO L124 PetriNetUnfolderBase]: 854/4132 cut-off events. [2023-08-04 03:08:53,251 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 03:08:53,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4806 conditions, 4132 events. 854/4132 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 33694 event pairs, 11 based on Foata normal form. 0/3522 useless extension candidates. Maximal degree in co-relation 2476. Up to 192 conditions per place. [2023-08-04 03:08:53,296 INFO L82 GeneralOperation]: Start removeDead. Operand has 217 places, 241 transitions, 572 flow [2023-08-04 03:08:53,321 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 217 places, 241 transitions, 572 flow [2023-08-04 03:08:53,321 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:08:53,321 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 217 places, 241 transitions, 572 flow [2023-08-04 03:08:53,322 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 217 places, 241 transitions, 572 flow [2023-08-04 03:08:53,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 217 places, 241 transitions, 572 flow [2023-08-04 03:08:53,864 INFO L124 PetriNetUnfolderBase]: 854/4132 cut-off events. [2023-08-04 03:08:53,865 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 03:08:53,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4806 conditions, 4132 events. 854/4132 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 33694 event pairs, 11 based on Foata normal form. 0/3522 useless extension candidates. Maximal degree in co-relation 2476. Up to 192 conditions per place. [2023-08-04 03:08:53,975 INFO L119 LiptonReduction]: Number of co-enabled transitions 14832 [2023-08-04 03:08:59,034 INFO L134 LiptonReduction]: Checked pairs total: 35771 [2023-08-04 03:08:59,035 INFO L136 LiptonReduction]: Total number of compositions: 190 [2023-08-04 03:08:59,037 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 03:08:59,038 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;@51f3e2d1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:08:59,038 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 03:08:59,047 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:08:59,047 INFO L124 PetriNetUnfolderBase]: 12/115 cut-off events. [2023-08-04 03:08:59,047 INFO L125 PetriNetUnfolderBase]: For 15/16 co-relation queries the response was YES. [2023-08-04 03:08:59,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:08:59,047 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-04 03:08:59,047 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 03:08:59,048 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:08:59,048 INFO L85 PathProgramCache]: Analyzing trace with hash -659892015, now seen corresponding path program 1 times [2023-08-04 03:08:59,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:08:59,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126106760] [2023-08-04 03:08:59,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:08:59,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:08:59,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:08:59,225 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:08:59,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:08:59,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126106760] [2023-08-04 03:08:59,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126106760] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:08:59,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910801527] [2023-08-04 03:08:59,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:08:59,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:08:59,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:08:59,231 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 03:08:59,232 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 03:08:59,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:08:59,331 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:08:59,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:08:59,412 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:08:59,413 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:08:59,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910801527] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:08:59,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:08:59,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 03:08:59,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663215567] [2023-08-04 03:08:59,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:08:59,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:08:59,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:08:59,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:08:59,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 03:08:59,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 431 [2023-08-04 03:08:59,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 75 transitions, 240 flow. Second operand has 5 states, 5 states have (on average 192.8) internal successors, (964), 5 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:08:59,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:08:59,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 431 [2023-08-04 03:08:59,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:09:19,088 INFO L124 PetriNetUnfolderBase]: 196754/265123 cut-off events. [2023-08-04 03:09:19,089 INFO L125 PetriNetUnfolderBase]: For 32578/32578 co-relation queries the response was YES. [2023-08-04 03:09:19,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 528907 conditions, 265123 events. 196754/265123 cut-off events. For 32578/32578 co-relation queries the response was YES. Maximal size of possible extension queue 6038. Compared 1811816 event pairs, 89597 based on Foata normal form. 0/201995 useless extension candidates. Maximal degree in co-relation 170749. Up to 242432 conditions per place. [2023-08-04 03:09:20,098 INFO L140 encePairwiseOnDemand]: 426/431 looper letters, 41 selfloop transitions, 5 changer transitions 31/86 dead transitions. [2023-08-04 03:09:20,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 86 transitions, 406 flow [2023-08-04 03:09:20,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:09:20,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:09:20,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1031 transitions. [2023-08-04 03:09:20,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47842227378190255 [2023-08-04 03:09:20,119 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1031 transitions. [2023-08-04 03:09:20,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1031 transitions. [2023-08-04 03:09:20,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:09:20,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1031 transitions. [2023-08-04 03:09:20,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 206.2) internal successors, (1031), 5 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:09:20,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 431.0) internal successors, (2586), 6 states have internal predecessors, (2586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:09:20,152 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 431.0) internal successors, (2586), 6 states have internal predecessors, (2586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:09:20,154 INFO L175 Difference]: Start difference. First operand has 65 places, 75 transitions, 240 flow. Second operand 5 states and 1031 transitions. [2023-08-04 03:09:20,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 86 transitions, 406 flow [2023-08-04 03:09:20,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 86 transitions, 398 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 03:09:20,214 INFO L231 Difference]: Finished difference. Result has 66 places, 45 transitions, 137 flow [2023-08-04 03:09:20,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=431, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=137, PETRI_PLACES=66, PETRI_TRANSITIONS=45} [2023-08-04 03:09:20,220 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 1 predicate places. [2023-08-04 03:09:20,221 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 45 transitions, 137 flow [2023-08-04 03:09:20,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 192.8) internal successors, (964), 5 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:09:20,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:09:20,222 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 03:09:20,235 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 03:09:20,430 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 03:09:20,430 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:09:20,430 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:09:20,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1137184702, now seen corresponding path program 1 times [2023-08-04 03:09:20,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:09:20,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907376758] [2023-08-04 03:09:20,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:09:20,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:09:20,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:09:20,523 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 03:09:20,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:09:20,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907376758] [2023-08-04 03:09:20,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907376758] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:09:20,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:09:20,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 03:09:20,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093507202] [2023-08-04 03:09:20,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:09:20,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:09:20,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:09:20,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:09:20,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:09:20,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 431 [2023-08-04 03:09:20,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 45 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 194.33333333333334) internal successors, (583), 3 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:09:20,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:09:20,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 431 [2023-08-04 03:09:20,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:09:23,299 INFO L124 PetriNetUnfolderBase]: 26750/37356 cut-off events. [2023-08-04 03:09:23,300 INFO L125 PetriNetUnfolderBase]: For 1872/1872 co-relation queries the response was YES. [2023-08-04 03:09:23,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73206 conditions, 37356 events. 26750/37356 cut-off events. For 1872/1872 co-relation queries the response was YES. Maximal size of possible extension queue 1089. Compared 222209 event pairs, 15294 based on Foata normal form. 1/29729 useless extension candidates. Maximal degree in co-relation 22294. Up to 33159 conditions per place. [2023-08-04 03:09:23,485 INFO L140 encePairwiseOnDemand]: 428/431 looper letters, 37 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2023-08-04 03:09:23,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 48 transitions, 220 flow [2023-08-04 03:09:23,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:09:23,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:09:23,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 615 transitions. [2023-08-04 03:09:23,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4756380510440835 [2023-08-04 03:09:23,487 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 615 transitions. [2023-08-04 03:09:23,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 615 transitions. [2023-08-04 03:09:23,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:09:23,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 615 transitions. [2023-08-04 03:09:23,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:09:23,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 431.0) internal successors, (1724), 4 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:09:23,493 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 431.0) internal successors, (1724), 4 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:09:23,493 INFO L175 Difference]: Start difference. First operand has 66 places, 45 transitions, 137 flow. Second operand 3 states and 615 transitions. [2023-08-04 03:09:23,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 48 transitions, 220 flow [2023-08-04 03:09:23,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 48 transitions, 215 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-04 03:09:23,498 INFO L231 Difference]: Finished difference. Result has 54 places, 44 transitions, 131 flow [2023-08-04 03:09:23,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=431, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=54, PETRI_TRANSITIONS=44} [2023-08-04 03:09:23,499 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -11 predicate places. [2023-08-04 03:09:23,499 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 44 transitions, 131 flow [2023-08-04 03:09:23,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 194.33333333333334) internal successors, (583), 3 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:09:23,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:09:23,500 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:09:23,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 03:09:23,500 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:09:23,501 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:09:23,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1104626483, now seen corresponding path program 1 times [2023-08-04 03:09:23,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:09:23,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186225296] [2023-08-04 03:09:23,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:09:23,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:09:23,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:09:23,596 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 03:09:23,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:09:23,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186225296] [2023-08-04 03:09:23,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186225296] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:09:23,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32843055] [2023-08-04 03:09:23,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:09:23,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:09:23,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:09:23,602 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 03:09:23,605 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 03:09:23,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:09:23,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:09:23,688 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:09:23,707 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 03:09:23,707 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:09:23,725 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 03:09:23,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32843055] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:09:23,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:09:23,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 03:09:23,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890038642] [2023-08-04 03:09:23,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:09:23,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:09:23,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:09:23,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:09:23,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:09:23,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 431 [2023-08-04 03:09:23,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 44 transitions, 131 flow. Second operand has 5 states, 5 states have (on average 193.8) internal successors, (969), 5 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:09:23,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:09:23,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 431 [2023-08-04 03:09:23,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:09:25,722 INFO L124 PetriNetUnfolderBase]: 21269/29232 cut-off events. [2023-08-04 03:09:25,722 INFO L125 PetriNetUnfolderBase]: For 1116/1116 co-relation queries the response was YES. [2023-08-04 03:09:25,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57049 conditions, 29232 events. 21269/29232 cut-off events. For 1116/1116 co-relation queries the response was YES. Maximal size of possible extension queue 909. Compared 163085 event pairs, 9072 based on Foata normal form. 3/23111 useless extension candidates. Maximal degree in co-relation 22210. Up to 26049 conditions per place. [2023-08-04 03:09:25,922 INFO L140 encePairwiseOnDemand]: 428/431 looper letters, 41 selfloop transitions, 3 changer transitions 0/53 dead transitions. [2023-08-04 03:09:25,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 53 transitions, 236 flow [2023-08-04 03:09:25,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:09:25,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:09:25,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 809 transitions. [2023-08-04 03:09:25,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46925754060324826 [2023-08-04 03:09:25,926 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 809 transitions. [2023-08-04 03:09:25,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 809 transitions. [2023-08-04 03:09:25,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:09:25,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 809 transitions. [2023-08-04 03:09:25,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 202.25) internal successors, (809), 4 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:09:25,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 431.0) internal successors, (2155), 5 states have internal predecessors, (2155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:09:25,933 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 431.0) internal successors, (2155), 5 states have internal predecessors, (2155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:09:25,933 INFO L175 Difference]: Start difference. First operand has 54 places, 44 transitions, 131 flow. Second operand 4 states and 809 transitions. [2023-08-04 03:09:25,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 53 transitions, 236 flow [2023-08-04 03:09:25,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 53 transitions, 232 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 03:09:25,935 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 128 flow [2023-08-04 03:09:25,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=431, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=128, PETRI_PLACES=55, PETRI_TRANSITIONS=43} [2023-08-04 03:09:25,936 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -10 predicate places. [2023-08-04 03:09:25,936 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 128 flow [2023-08-04 03:09:25,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 193.8) internal successors, (969), 5 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:09:25,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:09:25,937 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:09:25,947 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 03:09:26,142 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,SelfDestructingSolverStorable3 [2023-08-04 03:09:26,143 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:09:26,143 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:09:26,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1817711991, now seen corresponding path program 1 times [2023-08-04 03:09:26,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:09:26,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831771173] [2023-08-04 03:09:26,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:09:26,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:09:26,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:09:26,217 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 03:09:26,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:09:26,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831771173] [2023-08-04 03:09:26,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831771173] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:09:26,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792925758] [2023-08-04 03:09:26,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:09:26,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:09:26,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:09:26,220 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 03:09:26,242 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 03:09:26,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:09:26,312 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:09:26,314 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:09:26,336 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 03:09:26,336 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:09:26,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792925758] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:09:26,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:09:26,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 03:09:26,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009453796] [2023-08-04 03:09:26,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:09:26,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:09:26,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:09:26,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:09:26,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 03:09:26,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 431 [2023-08-04 03:09:26,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 43 transitions, 128 flow. Second operand has 5 states, 5 states have (on average 193.8) internal successors, (969), 5 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:09:26,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:09:26,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 431 [2023-08-04 03:09:26,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:09:28,415 INFO L124 PetriNetUnfolderBase]: 20945/29349 cut-off events. [2023-08-04 03:09:28,415 INFO L125 PetriNetUnfolderBase]: For 919/919 co-relation queries the response was YES. [2023-08-04 03:09:28,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56824 conditions, 29349 events. 20945/29349 cut-off events. For 919/919 co-relation queries the response was YES. Maximal size of possible extension queue 920. Compared 171033 event pairs, 4000 based on Foata normal form. 0/23387 useless extension candidates. Maximal degree in co-relation 22066. Up to 24903 conditions per place. [2023-08-04 03:09:28,585 INFO L140 encePairwiseOnDemand]: 427/431 looper letters, 60 selfloop transitions, 5 changer transitions 0/73 dead transitions. [2023-08-04 03:09:28,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 73 transitions, 316 flow [2023-08-04 03:09:28,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:09:28,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:09:28,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1020 transitions. [2023-08-04 03:09:28,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4733178654292343 [2023-08-04 03:09:28,589 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1020 transitions. [2023-08-04 03:09:28,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1020 transitions. [2023-08-04 03:09:28,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:09:28,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1020 transitions. [2023-08-04 03:09:28,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 204.0) internal successors, (1020), 5 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:09:28,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 431.0) internal successors, (2586), 6 states have internal predecessors, (2586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:09:28,597 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 431.0) internal successors, (2586), 6 states have internal predecessors, (2586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:09:28,598 INFO L175 Difference]: Start difference. First operand has 55 places, 43 transitions, 128 flow. Second operand 5 states and 1020 transitions. [2023-08-04 03:09:28,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 73 transitions, 316 flow [2023-08-04 03:09:28,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 73 transitions, 309 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 03:09:28,600 INFO L231 Difference]: Finished difference. Result has 55 places, 45 transitions, 140 flow [2023-08-04 03:09:28,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=431, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=140, PETRI_PLACES=55, PETRI_TRANSITIONS=45} [2023-08-04 03:09:28,601 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -10 predicate places. [2023-08-04 03:09:28,601 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 45 transitions, 140 flow [2023-08-04 03:09:28,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 193.8) internal successors, (969), 5 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:09:28,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:09:28,602 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:09:28,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 03:09:28,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:09:28,816 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:09:28,816 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:09:28,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1701169475, now seen corresponding path program 1 times [2023-08-04 03:09:28,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:09:28,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595642597] [2023-08-04 03:09:28,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:09:28,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:09:28,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:09:28,865 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 03:09:28,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:09:28,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595642597] [2023-08-04 03:09:28,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595642597] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:09:28,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:09:28,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 03:09:28,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219945037] [2023-08-04 03:09:28,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:09:28,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:09:28,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:09:28,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:09:28,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:09:28,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 431 [2023-08-04 03:09:28,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 45 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 196.0) internal successors, (588), 3 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:09:28,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:09:28,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 431 [2023-08-04 03:09:28,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:09:30,638 INFO L124 PetriNetUnfolderBase]: 19955/27738 cut-off events. [2023-08-04 03:09:30,639 INFO L125 PetriNetUnfolderBase]: For 1132/1132 co-relation queries the response was YES. [2023-08-04 03:09:30,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54003 conditions, 27738 events. 19955/27738 cut-off events. For 1132/1132 co-relation queries the response was YES. Maximal size of possible extension queue 920. Compared 157855 event pairs, 11560 based on Foata normal form. 9/22066 useless extension candidates. Maximal degree in co-relation 20899. Up to 24207 conditions per place. [2023-08-04 03:09:30,797 INFO L140 encePairwiseOnDemand]: 428/431 looper letters, 44 selfloop transitions, 2 changer transitions 0/54 dead transitions. [2023-08-04 03:09:30,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 54 transitions, 249 flow [2023-08-04 03:09:30,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:09:30,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:09:30,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 621 transitions. [2023-08-04 03:09:30,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4802784222737819 [2023-08-04 03:09:30,800 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 621 transitions. [2023-08-04 03:09:30,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 621 transitions. [2023-08-04 03:09:30,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:09:30,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 621 transitions. [2023-08-04 03:09:30,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:09:30,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 431.0) internal successors, (1724), 4 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:09:30,805 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 431.0) internal successors, (1724), 4 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:09:30,805 INFO L175 Difference]: Start difference. First operand has 55 places, 45 transitions, 140 flow. Second operand 3 states and 621 transitions. [2023-08-04 03:09:30,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 54 transitions, 249 flow [2023-08-04 03:09:30,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 54 transitions, 248 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:09:30,807 INFO L231 Difference]: Finished difference. Result has 56 places, 44 transitions, 138 flow [2023-08-04 03:09:30,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=431, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=56, PETRI_TRANSITIONS=44} [2023-08-04 03:09:30,808 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -9 predicate places. [2023-08-04 03:09:30,808 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 44 transitions, 138 flow [2023-08-04 03:09:30,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 196.0) internal successors, (588), 3 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:09:30,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:09:30,809 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:09:30,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 03:09:30,809 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:09:30,810 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:09:30,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1320102548, now seen corresponding path program 1 times [2023-08-04 03:09:30,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:09:30,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412901994] [2023-08-04 03:09:30,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:09:30,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:09:30,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:09:30,865 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 03:09:30,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:09:30,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412901994] [2023-08-04 03:09:30,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412901994] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:09:30,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982064458] [2023-08-04 03:09:30,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:09:30,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:09:30,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:09:30,870 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 03:09:30,899 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 03:09:30,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:09:30,975 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:09:30,977 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:09:31,000 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 03:09:31,000 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:09:31,020 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 03:09:31,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982064458] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:09:31,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:09:31,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 03:09:31,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901459896] [2023-08-04 03:09:31,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:09:31,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:09:31,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:09:31,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:09:31,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:09:31,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 431 [2023-08-04 03:09:31,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 44 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 194.8) internal successors, (974), 5 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:09:31,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:09:31,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 431 [2023-08-04 03:09:31,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:09:32,339 INFO L124 PetriNetUnfolderBase]: 15959/21879 cut-off events. [2023-08-04 03:09:32,340 INFO L125 PetriNetUnfolderBase]: For 943/943 co-relation queries the response was YES. [2023-08-04 03:09:32,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42753 conditions, 21879 events. 15959/21879 cut-off events. For 943/943 co-relation queries the response was YES. Maximal size of possible extension queue 823. Compared 116517 event pairs, 6988 based on Foata normal form. 27/17305 useless extension candidates. Maximal degree in co-relation 16465. Up to 18618 conditions per place. [2023-08-04 03:09:32,628 INFO L140 encePairwiseOnDemand]: 428/431 looper letters, 54 selfloop transitions, 3 changer transitions 0/65 dead transitions. [2023-08-04 03:09:32,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 65 transitions, 293 flow [2023-08-04 03:09:32,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:09:32,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:09:32,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 821 transitions. [2023-08-04 03:09:32,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4762180974477958 [2023-08-04 03:09:32,631 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 821 transitions. [2023-08-04 03:09:32,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 821 transitions. [2023-08-04 03:09:32,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:09:32,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 821 transitions. [2023-08-04 03:09:32,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 205.25) internal successors, (821), 4 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:09:32,636 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 431.0) internal successors, (2155), 5 states have internal predecessors, (2155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:09:32,637 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 431.0) internal successors, (2155), 5 states have internal predecessors, (2155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:09:32,637 INFO L175 Difference]: Start difference. First operand has 56 places, 44 transitions, 138 flow. Second operand 4 states and 821 transitions. [2023-08-04 03:09:32,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 65 transitions, 293 flow [2023-08-04 03:09:32,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 65 transitions, 289 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 03:09:32,639 INFO L231 Difference]: Finished difference. Result has 57 places, 43 transitions, 135 flow [2023-08-04 03:09:32,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=431, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=135, PETRI_PLACES=57, PETRI_TRANSITIONS=43} [2023-08-04 03:09:32,640 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -8 predicate places. [2023-08-04 03:09:32,640 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 43 transitions, 135 flow [2023-08-04 03:09:32,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 194.8) internal successors, (974), 5 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:09:32,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:09:32,640 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:09:32,646 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-04 03:09:32,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:09:32,846 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:09:32,846 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:09:32,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1661636940, now seen corresponding path program 1 times [2023-08-04 03:09:32,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:09:32,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217379722] [2023-08-04 03:09:32,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:09:32,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:09:32,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:09:32,922 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 03:09:32,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:09:32,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217379722] [2023-08-04 03:09:32,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217379722] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:09:32,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189359402] [2023-08-04 03:09:32,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:09:32,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:09:32,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:09:32,927 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 03:09:32,928 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 03:09:33,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:09:33,024 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:09:33,025 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:09:33,047 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 03:09:33,047 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:09:33,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189359402] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:09:33,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:09:33,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 03:09:33,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209945738] [2023-08-04 03:09:33,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:09:33,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:09:33,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:09:33,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:09:33,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 03:09:33,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 431 [2023-08-04 03:09:33,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 43 transitions, 135 flow. Second operand has 5 states, 5 states have (on average 194.8) internal successors, (974), 5 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:09:33,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:09:33,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 431 [2023-08-04 03:09:33,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:09:34,207 INFO L124 PetriNetUnfolderBase]: 12071/15723 cut-off events. [2023-08-04 03:09:34,208 INFO L125 PetriNetUnfolderBase]: For 952/952 co-relation queries the response was YES. [2023-08-04 03:09:34,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31818 conditions, 15723 events. 12071/15723 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 69236 event pairs, 892 based on Foata normal form. 729/12985 useless extension candidates. Maximal degree in co-relation 12855. Up to 6885 conditions per place. [2023-08-04 03:09:34,239 INFO L140 encePairwiseOnDemand]: 428/431 looper letters, 0 selfloop transitions, 0 changer transitions 86/86 dead transitions. [2023-08-04 03:09:34,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 86 transitions, 377 flow [2023-08-04 03:09:34,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:09:34,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:09:34,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1033 transitions. [2023-08-04 03:09:34,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4793503480278422 [2023-08-04 03:09:34,242 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1033 transitions. [2023-08-04 03:09:34,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1033 transitions. [2023-08-04 03:09:34,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:09:34,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1033 transitions. [2023-08-04 03:09:34,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 206.6) internal successors, (1033), 5 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:09:34,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 431.0) internal successors, (2586), 6 states have internal predecessors, (2586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:09:34,248 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 431.0) internal successors, (2586), 6 states have internal predecessors, (2586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:09:34,248 INFO L175 Difference]: Start difference. First operand has 57 places, 43 transitions, 135 flow. Second operand 5 states and 1033 transitions. [2023-08-04 03:09:34,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 86 transitions, 377 flow [2023-08-04 03:09:34,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 86 transitions, 370 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 03:09:34,264 INFO L231 Difference]: Finished difference. Result has 56 places, 0 transitions, 0 flow [2023-08-04 03:09:34,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=431, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=56, PETRI_TRANSITIONS=0} [2023-08-04 03:09:34,264 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -9 predicate places. [2023-08-04 03:09:34,265 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 0 transitions, 0 flow [2023-08-04 03:09:34,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 194.8) internal successors, (974), 5 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:09:34,265 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 03:09:34,265 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 03:09:34,265 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 03:09:34,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-04 03:09:34,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:09:34,470 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:09:34,471 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (1/2) [2023-08-04 03:09:34,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 217 places, 241 transitions, 572 flow [2023-08-04 03:09:34,781 INFO L124 PetriNetUnfolderBase]: 854/4132 cut-off events. [2023-08-04 03:09:34,781 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 03:09:34,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4806 conditions, 4132 events. 854/4132 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 33694 event pairs, 11 based on Foata normal form. 0/3522 useless extension candidates. Maximal degree in co-relation 2476. Up to 192 conditions per place. [2023-08-04 03:09:34,809 INFO L82 GeneralOperation]: Start removeDead. Operand has 217 places, 241 transitions, 572 flow [2023-08-04 03:09:34,825 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 217 places, 241 transitions, 572 flow [2023-08-04 03:09:34,825 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:09:34,825 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 217 places, 241 transitions, 572 flow [2023-08-04 03:09:34,825 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 217 places, 241 transitions, 572 flow [2023-08-04 03:09:34,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 217 places, 241 transitions, 572 flow [2023-08-04 03:09:35,199 INFO L124 PetriNetUnfolderBase]: 854/4132 cut-off events. [2023-08-04 03:09:35,199 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 03:09:35,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4806 conditions, 4132 events. 854/4132 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 33694 event pairs, 11 based on Foata normal form. 0/3522 useless extension candidates. Maximal degree in co-relation 2476. Up to 192 conditions per place. [2023-08-04 03:09:35,303 INFO L119 LiptonReduction]: Number of co-enabled transitions 14832 [2023-08-04 03:09:39,899 INFO L134 LiptonReduction]: Checked pairs total: 35915 [2023-08-04 03:09:39,900 INFO L136 LiptonReduction]: Total number of compositions: 189 [2023-08-04 03:09:39,901 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 03:09:39,902 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;@51f3e2d1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:09:39,902 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 03:09:39,904 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:09:39,905 INFO L124 PetriNetUnfolderBase]: 3/32 cut-off events. [2023-08-04 03:09:39,905 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 03:09:39,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:09:39,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:09:39,905 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:09:39,905 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:09:39,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1606660505, now seen corresponding path program 1 times [2023-08-04 03:09:39,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:09:39,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231581134] [2023-08-04 03:09:39,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:09:39,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:09:39,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:09:39,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:09:39,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:09:39,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231581134] [2023-08-04 03:09:39,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231581134] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:09:39,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:09:39,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 03:09:39,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40329204] [2023-08-04 03:09:39,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:09:39,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:09:39,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:09:39,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:09:39,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:09:39,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 430 [2023-08-04 03:09:39,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 75 transitions, 240 flow. Second operand has 3 states, 3 states have (on average 194.66666666666666) internal successors, (584), 3 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:09:39,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:09:39,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 430 [2023-08-04 03:09:39,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:09:58,866 INFO L124 PetriNetUnfolderBase]: 195308/264013 cut-off events. [2023-08-04 03:09:58,866 INFO L125 PetriNetUnfolderBase]: For 34722/34722 co-relation queries the response was YES. [2023-08-04 03:09:59,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 525614 conditions, 264013 events. 195308/264013 cut-off events. For 34722/34722 co-relation queries the response was YES. Maximal size of possible extension queue 6153. Compared 1814456 event pairs, 110902 based on Foata normal form. 0/201399 useless extension candidates. Maximal degree in co-relation 172133. Up to 240499 conditions per place. [2023-08-04 03:10:00,432 INFO L140 encePairwiseOnDemand]: 426/430 looper letters, 64 selfloop transitions, 2 changer transitions 3/79 dead transitions. [2023-08-04 03:10:00,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 79 transitions, 380 flow [2023-08-04 03:10:00,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:10:00,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:10:00,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 644 transitions. [2023-08-04 03:10:00,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4992248062015504 [2023-08-04 03:10:00,435 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 644 transitions. [2023-08-04 03:10:00,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 644 transitions. [2023-08-04 03:10:00,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:10:00,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 644 transitions. [2023-08-04 03:10:00,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 214.66666666666666) internal successors, (644), 3 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:10:00,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 430.0) internal successors, (1720), 4 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:10:00,439 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 430.0) internal successors, (1720), 4 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:10:00,439 INFO L175 Difference]: Start difference. First operand has 65 places, 75 transitions, 240 flow. Second operand 3 states and 644 transitions. [2023-08-04 03:10:00,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 79 transitions, 380 flow [2023-08-04 03:10:00,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 79 transitions, 380 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 03:10:00,465 INFO L231 Difference]: Finished difference. Result has 67 places, 72 transitions, 232 flow [2023-08-04 03:10:00,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=430, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=232, PETRI_PLACES=67, PETRI_TRANSITIONS=72} [2023-08-04 03:10:00,466 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 2 predicate places. [2023-08-04 03:10:00,466 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 72 transitions, 232 flow [2023-08-04 03:10:00,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 194.66666666666666) internal successors, (584), 3 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:10:00,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:10:00,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:10:00,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 03:10:00,467 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:10:00,467 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:10:00,468 INFO L85 PathProgramCache]: Analyzing trace with hash 274743957, now seen corresponding path program 1 times [2023-08-04 03:10:00,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:10:00,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136905988] [2023-08-04 03:10:00,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:10:00,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:10:00,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:10:00,503 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 03:10:00,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:10:00,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136905988] [2023-08-04 03:10:00,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136905988] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:10:00,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483928453] [2023-08-04 03:10:00,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:10:00,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:10:00,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:10:00,505 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 03:10:00,538 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 03:10:00,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:10:00,601 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 03:10:00,602 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:10:00,611 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 03:10:00,611 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:10:00,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483928453] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:10:00,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:10:00,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 03:10:00,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453881823] [2023-08-04 03:10:00,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:10:00,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:10:00,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:10:00,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:10:00,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:10:00,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 430 [2023-08-04 03:10:00,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 72 transitions, 232 flow. Second operand has 3 states, 3 states have (on average 195.66666666666666) internal successors, (587), 3 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:10:00,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:10:00,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 430 [2023-08-04 03:10:00,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand