/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/stack_longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 17:42:43,549 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 17:42:43,550 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 17:42:43,578 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 17:42:43,578 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 17:42:43,579 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 17:42:43,580 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 17:42:43,582 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 17:42:43,584 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 17:42:43,587 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 17:42:43,588 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 17:42:43,589 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 17:42:43,589 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 17:42:43,591 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 17:42:43,591 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 17:42:43,592 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 17:42:43,593 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 17:42:43,593 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 17:42:43,595 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 17:42:43,598 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 17:42:43,599 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 17:42:43,599 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 17:42:43,600 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 17:42:43,601 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 17:42:43,607 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-27 17:42:43,611 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 17:42:43,612 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 17:42:43,612 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 17:42:43,613 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-01-27 17:42:43,637 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 17:42:43,637 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 17:42:43,638 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 17:42:43,638 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 17:42:43,639 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 17:42:43,639 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 17:42:43,639 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 17:42:43,639 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 17:42:43,639 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 17:42:43,639 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 17:42:43,640 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 17:42:43,640 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 17:42:43,640 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 17:42:43,640 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 17:42:43,640 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 17:42:43,640 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 17:42:43,640 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 17:42:43,640 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 17:42:43,640 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 17:42:43,640 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 17:42:43,640 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 17:42:43,640 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 17:42:43,641 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 17:42:43,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 17:42:43,641 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 17:42:43,641 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 17:42:43,641 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 17:42:43,641 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 17:42:43,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 17:42:43,641 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 17:42:43,642 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 17:42:43,642 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 17:42:43,825 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 17:42:43,840 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 17:42:43,842 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 17:42:43,843 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 17:42:43,843 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 17:42:43,844 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longer-1.i [2023-01-27 17:42:44,727 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 17:42:44,954 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 17:42:44,954 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longer-1.i [2023-01-27 17:42:44,974 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b93a9554d/73c623508a874fe69106120b59652bf9/FLAG0c32c5eaf [2023-01-27 17:42:44,986 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b93a9554d/73c623508a874fe69106120b59652bf9 [2023-01-27 17:42:44,988 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 17:42:44,989 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 17:42:44,990 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 17:42:44,991 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 17:42:44,992 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 17:42:44,993 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 05:42:44" (1/1) ... [2023-01-27 17:42:44,994 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f57d908 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:42:44, skipping insertion in model container [2023-01-27 17:42:44,994 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 05:42:44" (1/1) ... [2023-01-27 17:42:44,998 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 17:42:45,028 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 17:42:45,306 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longer-1.i[41527,41540] [2023-01-27 17:42:45,334 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 17:42:45,341 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 17:42:45,363 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longer-1.i[41527,41540] [2023-01-27 17:42:45,369 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 17:42:45,404 INFO L208 MainTranslator]: Completed translation [2023-01-27 17:42:45,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:42:45 WrapperNode [2023-01-27 17:42:45,406 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 17:42:45,406 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 17:42:45,406 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 17:42:45,407 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 17:42:45,411 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:42:45" (1/1) ... [2023-01-27 17:42:45,422 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:42:45" (1/1) ... [2023-01-27 17:42:45,439 INFO L138 Inliner]: procedures = 277, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 156 [2023-01-27 17:42:45,439 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 17:42:45,439 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 17:42:45,440 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 17:42:45,440 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 17:42:45,450 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:42:45" (1/1) ... [2023-01-27 17:42:45,450 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:42:45" (1/1) ... [2023-01-27 17:42:45,453 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:42:45" (1/1) ... [2023-01-27 17:42:45,453 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:42:45" (1/1) ... [2023-01-27 17:42:45,459 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:42:45" (1/1) ... [2023-01-27 17:42:45,469 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:42:45" (1/1) ... [2023-01-27 17:42:45,471 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:42:45" (1/1) ... [2023-01-27 17:42:45,471 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:42:45" (1/1) ... [2023-01-27 17:42:45,473 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 17:42:45,474 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 17:42:45,474 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 17:42:45,474 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 17:42:45,475 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:42:45" (1/1) ... [2023-01-27 17:42:45,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 17:42:45,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 17:42:45,503 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) [2023-01-27 17:42:45,510 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 [2023-01-27 17:42:45,530 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-01-27 17:42:45,530 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-01-27 17:42:45,530 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-01-27 17:42:45,530 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-01-27 17:42:45,531 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 17:42:45,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 17:42:45,531 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 17:42:45,531 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 17:42:45,532 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-01-27 17:42:45,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 17:42:45,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 17:42:45,535 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 17:42:45,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 17:42:45,536 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-27 17:42:45,661 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 17:42:45,662 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 17:42:45,870 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 17:42:45,876 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 17:42:45,876 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-01-27 17:42:45,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 05:42:45 BoogieIcfgContainer [2023-01-27 17:42:45,881 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 17:42:45,882 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 17:42:45,883 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 17:42:45,885 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 17:42:45,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 05:42:44" (1/3) ... [2023-01-27 17:42:45,885 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cc2994f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 05:42:45, skipping insertion in model container [2023-01-27 17:42:45,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:42:45" (2/3) ... [2023-01-27 17:42:45,886 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cc2994f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 05:42:45, skipping insertion in model container [2023-01-27 17:42:45,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 05:42:45" (3/3) ... [2023-01-27 17:42:45,887 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longer-1.i [2023-01-27 17:42:45,903 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 17:42:45,903 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-01-27 17:42:45,903 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 17:42:45,972 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-27 17:42:46,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 158 transitions, 332 flow [2023-01-27 17:42:46,067 INFO L130 PetriNetUnfolder]: 10/156 cut-off events. [2023-01-27 17:42:46,067 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 17:42:46,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 156 events. 10/156 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 373 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 118. Up to 3 conditions per place. [2023-01-27 17:42:46,073 INFO L82 GeneralOperation]: Start removeDead. Operand has 155 places, 158 transitions, 332 flow [2023-01-27 17:42:46,076 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 144 places, 147 transitions, 303 flow [2023-01-27 17:42:46,078 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 17:42:46,092 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 144 places, 147 transitions, 303 flow [2023-01-27 17:42:46,096 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 144 places, 147 transitions, 303 flow [2023-01-27 17:42:46,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 144 places, 147 transitions, 303 flow [2023-01-27 17:42:46,117 INFO L130 PetriNetUnfolder]: 10/147 cut-off events. [2023-01-27 17:42:46,117 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 17:42:46,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 147 events. 10/147 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 302 event pairs, 0 based on Foata normal form. 0/135 useless extension candidates. Maximal degree in co-relation 118. Up to 3 conditions per place. [2023-01-27 17:42:46,121 INFO L119 LiptonReduction]: Number of co-enabled transitions 7334 [2023-01-27 17:42:48,740 INFO L134 LiptonReduction]: Checked pairs total: 10082 [2023-01-27 17:42:48,740 INFO L136 LiptonReduction]: Total number of compositions: 135 [2023-01-27 17:42:48,762 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 17:42:48,766 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=false, 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;@60ea493f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 17:42:48,766 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-01-27 17:42:48,769 INFO L130 PetriNetUnfolder]: 0/13 cut-off events. [2023-01-27 17:42:48,770 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2023-01-27 17:42:48,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:42:48,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-01-27 17:42:48,770 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 17:42:48,773 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:42:48,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1684934246, now seen corresponding path program 1 times [2023-01-27 17:42:48,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:42:48,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390388118] [2023-01-27 17:42:48,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:42:48,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:42:48,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:42:48,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:42:48,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:42:48,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390388118] [2023-01-27 17:42:48,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390388118] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:42:48,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:42:48,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 17:42:48,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552852176] [2023-01-27 17:42:48,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:42:48,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 17:42:48,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:42:48,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 17:42:48,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 17:42:48,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 293 [2023-01-27 17:42:48,968 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:48,968 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:42:48,968 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 293 [2023-01-27 17:42:48,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:42:49,150 INFO L130 PetriNetUnfolder]: 845/1382 cut-off events. [2023-01-27 17:42:49,151 INFO L131 PetriNetUnfolder]: For 70/70 co-relation queries the response was YES. [2023-01-27 17:42:49,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2798 conditions, 1382 events. 845/1382 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 5801 event pairs, 243 based on Foata normal form. 0/1128 useless extension candidates. Maximal degree in co-relation 2590. Up to 777 conditions per place. [2023-01-27 17:42:49,159 INFO L137 encePairwiseOnDemand]: 288/293 looper letters, 55 selfloop transitions, 4 changer transitions 0/60 dead transitions. [2023-01-27 17:42:49,159 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 60 transitions, 253 flow [2023-01-27 17:42:49,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 17:42:49,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 17:42:49,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 471 transitions. [2023-01-27 17:42:49,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5358361774744027 [2023-01-27 17:42:49,178 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 471 transitions. [2023-01-27 17:42:49,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 471 transitions. [2023-01-27 17:42:49,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:42:49,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 471 transitions. [2023-01-27 17:42:49,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:49,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:49,190 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:49,191 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 75 flow. Second operand 3 states and 471 transitions. [2023-01-27 17:42:49,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 60 transitions, 253 flow [2023-01-27 17:42:49,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 60 transitions, 245 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-01-27 17:42:49,196 INFO L231 Difference]: Finished difference. Result has 36 places, 36 transitions, 100 flow [2023-01-27 17:42:49,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=36, PETRI_TRANSITIONS=36} [2023-01-27 17:42:49,199 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 1 predicate places. [2023-01-27 17:42:49,199 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 36 transitions, 100 flow [2023-01-27 17:42:49,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:49,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:42:49,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:42:49,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 17:42:49,201 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 17:42:49,201 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:42:49,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1024065199, now seen corresponding path program 1 times [2023-01-27 17:42:49,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:42:49,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54066806] [2023-01-27 17:42:49,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:42:49,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:42:49,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:42:49,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:42:49,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:42:49,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54066806] [2023-01-27 17:42:49,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54066806] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:42:49,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:42:49,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 17:42:49,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505766245] [2023-01-27 17:42:49,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:42:49,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 17:42:49,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:42:49,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 17:42:49,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 17:42:49,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 293 [2023-01-27 17:42:49,323 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 36 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:49,323 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:42:49,323 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 293 [2023-01-27 17:42:49,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:42:49,444 INFO L130 PetriNetUnfolder]: 987/1600 cut-off events. [2023-01-27 17:42:49,444 INFO L131 PetriNetUnfolder]: For 161/161 co-relation queries the response was YES. [2023-01-27 17:42:49,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3491 conditions, 1600 events. 987/1600 cut-off events. For 161/161 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 6550 event pairs, 449 based on Foata normal form. 0/1334 useless extension candidates. Maximal degree in co-relation 3078. Up to 1301 conditions per place. [2023-01-27 17:42:49,450 INFO L137 encePairwiseOnDemand]: 290/293 looper letters, 50 selfloop transitions, 2 changer transitions 3/55 dead transitions. [2023-01-27 17:42:49,450 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 55 transitions, 255 flow [2023-01-27 17:42:49,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 17:42:49,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 17:42:49,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 482 transitions. [2023-01-27 17:42:49,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5483503981797497 [2023-01-27 17:42:49,451 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 482 transitions. [2023-01-27 17:42:49,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 482 transitions. [2023-01-27 17:42:49,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:42:49,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 482 transitions. [2023-01-27 17:42:49,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:49,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:49,454 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:49,454 INFO L175 Difference]: Start difference. First operand has 36 places, 36 transitions, 100 flow. Second operand 3 states and 482 transitions. [2023-01-27 17:42:49,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 55 transitions, 255 flow [2023-01-27 17:42:49,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 55 transitions, 245 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-27 17:42:49,456 INFO L231 Difference]: Finished difference. Result has 37 places, 37 transitions, 104 flow [2023-01-27 17:42:49,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=37, PETRI_TRANSITIONS=37} [2023-01-27 17:42:49,457 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 2 predicate places. [2023-01-27 17:42:49,457 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 37 transitions, 104 flow [2023-01-27 17:42:49,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:49,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:42:49,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:42:49,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 17:42:49,458 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 17:42:49,458 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:42:49,458 INFO L85 PathProgramCache]: Analyzing trace with hash 794946535, now seen corresponding path program 1 times [2023-01-27 17:42:49,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:42:49,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454259932] [2023-01-27 17:42:49,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:42:49,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:42:49,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:42:49,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:42:49,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:42:49,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454259932] [2023-01-27 17:42:49,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454259932] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:42:49,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:42:49,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 17:42:49,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908870571] [2023-01-27 17:42:49,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:42:49,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 17:42:49,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:42:49,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 17:42:49,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 17:42:49,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 293 [2023-01-27 17:42:49,505 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 37 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:49,505 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:42:49,505 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 293 [2023-01-27 17:42:49,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:42:49,643 INFO L130 PetriNetUnfolder]: 942/1555 cut-off events. [2023-01-27 17:42:49,643 INFO L131 PetriNetUnfolder]: For 117/117 co-relation queries the response was YES. [2023-01-27 17:42:49,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3440 conditions, 1555 events. 942/1555 cut-off events. For 117/117 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 6593 event pairs, 653 based on Foata normal form. 50/1437 useless extension candidates. Maximal degree in co-relation 3052. Up to 1389 conditions per place. [2023-01-27 17:42:49,651 INFO L137 encePairwiseOnDemand]: 290/293 looper letters, 51 selfloop transitions, 4 changer transitions 0/56 dead transitions. [2023-01-27 17:42:49,651 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 56 transitions, 266 flow [2023-01-27 17:42:49,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 17:42:49,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 17:42:49,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 473 transitions. [2023-01-27 17:42:49,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5381114903299203 [2023-01-27 17:42:49,653 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 473 transitions. [2023-01-27 17:42:49,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 473 transitions. [2023-01-27 17:42:49,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:42:49,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 473 transitions. [2023-01-27 17:42:49,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:49,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:49,655 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:49,655 INFO L175 Difference]: Start difference. First operand has 37 places, 37 transitions, 104 flow. Second operand 3 states and 473 transitions. [2023-01-27 17:42:49,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 56 transitions, 266 flow [2023-01-27 17:42:49,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 56 transitions, 264 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 17:42:49,657 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 122 flow [2023-01-27 17:42:49,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2023-01-27 17:42:49,658 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 4 predicate places. [2023-01-27 17:42:49,658 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 122 flow [2023-01-27 17:42:49,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:49,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:42:49,659 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:42:49,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-27 17:42:49,659 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 17:42:49,659 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:42:49,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1768410213, now seen corresponding path program 1 times [2023-01-27 17:42:49,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:42:49,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068212393] [2023-01-27 17:42:49,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:42:49,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:42:49,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:42:49,749 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:42:49,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:42:49,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068212393] [2023-01-27 17:42:49,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068212393] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 17:42:49,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099237651] [2023-01-27 17:42:49,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:42:49,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 17:42:49,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 17:42:49,752 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) [2023-01-27 17:42:49,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-27 17:42:49,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:42:49,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 4 conjunts are in the unsatisfiable core [2023-01-27 17:42:49,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 17:42:49,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:42:49,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 17:42:49,937 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:42:49,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099237651] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 17:42:49,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 17:42:49,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-01-27 17:42:49,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565682088] [2023-01-27 17:42:49,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 17:42:49,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-01-27 17:42:49,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:42:49,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-01-27 17:42:49,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-01-27 17:42:49,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 293 [2023-01-27 17:42:49,941 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 122 flow. Second operand has 10 states, 10 states have (on average 138.6) internal successors, (1386), 10 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:49,941 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:42:49,941 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 293 [2023-01-27 17:42:49,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:42:50,358 INFO L130 PetriNetUnfolder]: 1815/3000 cut-off events. [2023-01-27 17:42:50,358 INFO L131 PetriNetUnfolder]: For 1075/1075 co-relation queries the response was YES. [2023-01-27 17:42:50,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7073 conditions, 3000 events. 1815/3000 cut-off events. For 1075/1075 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 14146 event pairs, 349 based on Foata normal form. 48/2736 useless extension candidates. Maximal degree in co-relation 6486. Up to 844 conditions per place. [2023-01-27 17:42:50,369 INFO L137 encePairwiseOnDemand]: 287/293 looper letters, 164 selfloop transitions, 22 changer transitions 0/187 dead transitions. [2023-01-27 17:42:50,369 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 187 transitions, 900 flow [2023-01-27 17:42:50,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-27 17:42:50,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-27 17:42:50,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1535 transitions. [2023-01-27 17:42:50,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238907849829352 [2023-01-27 17:42:50,372 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1535 transitions. [2023-01-27 17:42:50,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1535 transitions. [2023-01-27 17:42:50,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:42:50,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1535 transitions. [2023-01-27 17:42:50,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 153.5) internal successors, (1535), 10 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:50,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 293.0) internal successors, (3223), 11 states have internal predecessors, (3223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:50,380 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 293.0) internal successors, (3223), 11 states have internal predecessors, (3223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:50,380 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 122 flow. Second operand 10 states and 1535 transitions. [2023-01-27 17:42:50,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 187 transitions, 900 flow [2023-01-27 17:42:50,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 187 transitions, 887 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 17:42:50,385 INFO L231 Difference]: Finished difference. Result has 51 places, 56 transitions, 280 flow [2023-01-27 17:42:50,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=280, PETRI_PLACES=51, PETRI_TRANSITIONS=56} [2023-01-27 17:42:50,385 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 16 predicate places. [2023-01-27 17:42:50,385 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 56 transitions, 280 flow [2023-01-27 17:42:50,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 138.6) internal successors, (1386), 10 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:50,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:42:50,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:42:50,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-27 17:42:50,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 17:42:50,590 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 17:42:50,590 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:42:50,590 INFO L85 PathProgramCache]: Analyzing trace with hash 362891190, now seen corresponding path program 1 times [2023-01-27 17:42:50,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:42:50,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697922507] [2023-01-27 17:42:50,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:42:50,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:42:50,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:42:50,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:42:50,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:42:50,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697922507] [2023-01-27 17:42:50,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697922507] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:42:50,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:42:50,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 17:42:50,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287838331] [2023-01-27 17:42:50,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:42:50,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 17:42:50,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:42:50,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 17:42:50,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 17:42:50,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 293 [2023-01-27 17:42:50,649 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 56 transitions, 280 flow. Second operand has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:50,649 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:42:50,649 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 293 [2023-01-27 17:42:50,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:42:50,733 INFO L130 PetriNetUnfolder]: 613/1142 cut-off events. [2023-01-27 17:42:50,734 INFO L131 PetriNetUnfolder]: For 302/302 co-relation queries the response was YES. [2023-01-27 17:42:50,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2796 conditions, 1142 events. 613/1142 cut-off events. For 302/302 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4886 event pairs, 98 based on Foata normal form. 0/1062 useless extension candidates. Maximal degree in co-relation 1750. Up to 861 conditions per place. [2023-01-27 17:42:50,738 INFO L137 encePairwiseOnDemand]: 288/293 looper letters, 49 selfloop transitions, 5 changer transitions 0/55 dead transitions. [2023-01-27 17:42:50,738 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 55 transitions, 335 flow [2023-01-27 17:42:50,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 17:42:50,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 17:42:50,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 451 transitions. [2023-01-27 17:42:50,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5130830489192264 [2023-01-27 17:42:50,739 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 451 transitions. [2023-01-27 17:42:50,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 451 transitions. [2023-01-27 17:42:50,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:42:50,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 451 transitions. [2023-01-27 17:42:50,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.33333333333334) internal successors, (451), 3 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:50,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:50,741 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:50,741 INFO L175 Difference]: Start difference. First operand has 51 places, 56 transitions, 280 flow. Second operand 3 states and 451 transitions. [2023-01-27 17:42:50,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 55 transitions, 335 flow [2023-01-27 17:42:50,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 55 transitions, 323 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-01-27 17:42:50,743 INFO L231 Difference]: Finished difference. Result has 49 places, 46 transitions, 204 flow [2023-01-27 17:42:50,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=49, PETRI_TRANSITIONS=46} [2023-01-27 17:42:50,744 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 14 predicate places. [2023-01-27 17:42:50,744 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 46 transitions, 204 flow [2023-01-27 17:42:50,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:50,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:42:50,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:42:50,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-27 17:42:50,745 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 17:42:50,745 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:42:50,745 INFO L85 PathProgramCache]: Analyzing trace with hash 647657202, now seen corresponding path program 1 times [2023-01-27 17:42:50,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:42:50,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939612256] [2023-01-27 17:42:50,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:42:50,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:42:50,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:42:50,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:42:50,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:42:50,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939612256] [2023-01-27 17:42:50,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939612256] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:42:50,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:42:50,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-27 17:42:50,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649422617] [2023-01-27 17:42:50,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:42:50,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 17:42:50,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:42:50,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 17:42:50,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-27 17:42:50,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 293 [2023-01-27 17:42:50,795 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 46 transitions, 204 flow. Second operand has 5 states, 5 states have (on average 138.6) internal successors, (693), 5 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:50,795 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:42:50,795 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 293 [2023-01-27 17:42:50,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:42:50,941 INFO L130 PetriNetUnfolder]: 727/1350 cut-off events. [2023-01-27 17:42:50,942 INFO L131 PetriNetUnfolder]: For 423/423 co-relation queries the response was YES. [2023-01-27 17:42:50,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3420 conditions, 1350 events. 727/1350 cut-off events. For 423/423 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 5723 event pairs, 207 based on Foata normal form. 12/1362 useless extension candidates. Maximal degree in co-relation 2672. Up to 529 conditions per place. [2023-01-27 17:42:50,947 INFO L137 encePairwiseOnDemand]: 287/293 looper letters, 80 selfloop transitions, 11 changer transitions 0/92 dead transitions. [2023-01-27 17:42:50,947 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 92 transitions, 526 flow [2023-01-27 17:42:50,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 17:42:50,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 17:42:50,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 759 transitions. [2023-01-27 17:42:50,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5180887372013652 [2023-01-27 17:42:50,949 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 759 transitions. [2023-01-27 17:42:50,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 759 transitions. [2023-01-27 17:42:50,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:42:50,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 759 transitions. [2023-01-27 17:42:50,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 151.8) internal successors, (759), 5 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:50,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 293.0) internal successors, (1758), 6 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:50,952 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 293.0) internal successors, (1758), 6 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:50,952 INFO L175 Difference]: Start difference. First operand has 49 places, 46 transitions, 204 flow. Second operand 5 states and 759 transitions. [2023-01-27 17:42:50,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 92 transitions, 526 flow [2023-01-27 17:42:50,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 92 transitions, 513 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 17:42:50,956 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 258 flow [2023-01-27 17:42:50,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=258, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2023-01-27 17:42:50,958 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 19 predicate places. [2023-01-27 17:42:50,958 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 258 flow [2023-01-27 17:42:50,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 138.6) internal successors, (693), 5 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:50,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:42:50,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:42:50,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-27 17:42:50,959 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 17:42:50,959 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:42:50,959 INFO L85 PathProgramCache]: Analyzing trace with hash 461657146, now seen corresponding path program 1 times [2023-01-27 17:42:50,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:42:50,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675247832] [2023-01-27 17:42:50,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:42:50,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:42:50,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:42:51,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:42:51,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:42:51,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675247832] [2023-01-27 17:42:51,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675247832] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:42:51,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:42:51,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-01-27 17:42:51,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82935981] [2023-01-27 17:42:51,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:42:51,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-27 17:42:51,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:42:51,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-27 17:42:51,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-01-27 17:42:51,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 293 [2023-01-27 17:42:51,430 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 258 flow. Second operand has 11 states, 11 states have (on average 111.0) internal successors, (1221), 11 states have internal predecessors, (1221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:51,430 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:42:51,430 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 293 [2023-01-27 17:42:51,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:42:51,947 INFO L130 PetriNetUnfolder]: 1075/1997 cut-off events. [2023-01-27 17:42:51,947 INFO L131 PetriNetUnfolder]: For 1232/1232 co-relation queries the response was YES. [2023-01-27 17:42:51,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5096 conditions, 1997 events. 1075/1997 cut-off events. For 1232/1232 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 9740 event pairs, 295 based on Foata normal form. 0/1979 useless extension candidates. Maximal degree in co-relation 3100. Up to 1191 conditions per place. [2023-01-27 17:42:51,955 INFO L137 encePairwiseOnDemand]: 283/293 looper letters, 115 selfloop transitions, 11 changer transitions 3/130 dead transitions. [2023-01-27 17:42:51,956 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 130 transitions, 796 flow [2023-01-27 17:42:51,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-27 17:42:51,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-27 17:42:51,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1091 transitions. [2023-01-27 17:42:51,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4137277208949564 [2023-01-27 17:42:51,958 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1091 transitions. [2023-01-27 17:42:51,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1091 transitions. [2023-01-27 17:42:51,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:42:51,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1091 transitions. [2023-01-27 17:42:51,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 121.22222222222223) internal successors, (1091), 9 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:51,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 293.0) internal successors, (2930), 10 states have internal predecessors, (2930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:51,964 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 293.0) internal successors, (2930), 10 states have internal predecessors, (2930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:51,964 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 258 flow. Second operand 9 states and 1091 transitions. [2023-01-27 17:42:51,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 130 transitions, 796 flow [2023-01-27 17:42:51,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 130 transitions, 776 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-01-27 17:42:51,967 INFO L231 Difference]: Finished difference. Result has 66 places, 58 transitions, 327 flow [2023-01-27 17:42:51,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=327, PETRI_PLACES=66, PETRI_TRANSITIONS=58} [2023-01-27 17:42:51,968 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 31 predicate places. [2023-01-27 17:42:51,968 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 58 transitions, 327 flow [2023-01-27 17:42:51,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 111.0) internal successors, (1221), 11 states have internal predecessors, (1221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:51,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:42:51,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:42:51,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-27 17:42:51,969 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 17:42:51,969 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:42:51,969 INFO L85 PathProgramCache]: Analyzing trace with hash -329150994, now seen corresponding path program 2 times [2023-01-27 17:42:51,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:42:51,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772784590] [2023-01-27 17:42:51,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:42:51,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:42:51,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:42:52,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:42:52,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:42:52,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772784590] [2023-01-27 17:42:52,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772784590] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:42:52,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:42:52,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-01-27 17:42:52,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817287792] [2023-01-27 17:42:52,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:42:52,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-27 17:42:52,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:42:52,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-27 17:42:52,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-01-27 17:42:52,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 293 [2023-01-27 17:42:52,413 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 58 transitions, 327 flow. Second operand has 11 states, 11 states have (on average 111.0) internal successors, (1221), 11 states have internal predecessors, (1221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:52,413 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:42:52,414 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 293 [2023-01-27 17:42:52,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:42:53,038 INFO L130 PetriNetUnfolder]: 1373/2553 cut-off events. [2023-01-27 17:42:53,039 INFO L131 PetriNetUnfolder]: For 1522/1522 co-relation queries the response was YES. [2023-01-27 17:42:53,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6951 conditions, 2553 events. 1373/2553 cut-off events. For 1522/1522 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 12875 event pairs, 355 based on Foata normal form. 0/2529 useless extension candidates. Maximal degree in co-relation 4514. Up to 1110 conditions per place. [2023-01-27 17:42:53,048 INFO L137 encePairwiseOnDemand]: 284/293 looper letters, 115 selfloop transitions, 16 changer transitions 3/135 dead transitions. [2023-01-27 17:42:53,048 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 135 transitions, 885 flow [2023-01-27 17:42:53,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-27 17:42:53,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-27 17:42:53,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1091 transitions. [2023-01-27 17:42:53,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4137277208949564 [2023-01-27 17:42:53,050 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1091 transitions. [2023-01-27 17:42:53,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1091 transitions. [2023-01-27 17:42:53,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:42:53,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1091 transitions. [2023-01-27 17:42:53,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 121.22222222222223) internal successors, (1091), 9 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:53,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 293.0) internal successors, (2930), 10 states have internal predecessors, (2930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:53,055 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 293.0) internal successors, (2930), 10 states have internal predecessors, (2930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:53,055 INFO L175 Difference]: Start difference. First operand has 66 places, 58 transitions, 327 flow. Second operand 9 states and 1091 transitions. [2023-01-27 17:42:53,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 135 transitions, 885 flow [2023-01-27 17:42:53,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 135 transitions, 885 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 17:42:53,059 INFO L231 Difference]: Finished difference. Result has 78 places, 64 transitions, 419 flow [2023-01-27 17:42:53,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=419, PETRI_PLACES=78, PETRI_TRANSITIONS=64} [2023-01-27 17:42:53,060 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 43 predicate places. [2023-01-27 17:42:53,060 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 64 transitions, 419 flow [2023-01-27 17:42:53,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 111.0) internal successors, (1221), 11 states have internal predecessors, (1221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:53,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:42:53,061 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:42:53,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-27 17:42:53,061 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 17:42:53,061 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:42:53,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1790252439, now seen corresponding path program 1 times [2023-01-27 17:42:53,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:42:53,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653994215] [2023-01-27 17:42:53,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:42:53,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:42:53,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:42:53,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 17:42:53,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:42:53,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653994215] [2023-01-27 17:42:53,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653994215] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:42:53,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:42:53,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-01-27 17:42:53,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719712859] [2023-01-27 17:42:53,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:42:53,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 17:42:53,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:42:53,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 17:42:53,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-01-27 17:42:53,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 293 [2023-01-27 17:42:53,159 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 64 transitions, 419 flow. Second operand has 7 states, 7 states have (on average 129.42857142857142) internal successors, (906), 7 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:53,159 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:42:53,159 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 293 [2023-01-27 17:42:53,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:42:53,430 INFO L130 PetriNetUnfolder]: 1393/2595 cut-off events. [2023-01-27 17:42:53,430 INFO L131 PetriNetUnfolder]: For 2184/2184 co-relation queries the response was YES. [2023-01-27 17:42:53,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7489 conditions, 2595 events. 1393/2595 cut-off events. For 2184/2184 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 12907 event pairs, 474 based on Foata normal form. 16/2581 useless extension candidates. Maximal degree in co-relation 5306. Up to 926 conditions per place. [2023-01-27 17:42:53,442 INFO L137 encePairwiseOnDemand]: 285/293 looper letters, 113 selfloop transitions, 20 changer transitions 0/134 dead transitions. [2023-01-27 17:42:53,442 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 134 transitions, 961 flow [2023-01-27 17:42:53,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-27 17:42:53,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-27 17:42:53,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1237 transitions. [2023-01-27 17:42:53,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46909366704588545 [2023-01-27 17:42:53,445 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1237 transitions. [2023-01-27 17:42:53,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1237 transitions. [2023-01-27 17:42:53,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:42:53,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1237 transitions. [2023-01-27 17:42:53,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 137.44444444444446) internal successors, (1237), 9 states have internal predecessors, (1237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:53,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 293.0) internal successors, (2930), 10 states have internal predecessors, (2930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:53,449 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 293.0) internal successors, (2930), 10 states have internal predecessors, (2930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:53,450 INFO L175 Difference]: Start difference. First operand has 78 places, 64 transitions, 419 flow. Second operand 9 states and 1237 transitions. [2023-01-27 17:42:53,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 134 transitions, 961 flow [2023-01-27 17:42:53,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 134 transitions, 931 flow, removed 12 selfloop flow, removed 3 redundant places. [2023-01-27 17:42:53,456 INFO L231 Difference]: Finished difference. Result has 85 places, 75 transitions, 554 flow [2023-01-27 17:42:53,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=554, PETRI_PLACES=85, PETRI_TRANSITIONS=75} [2023-01-27 17:42:53,457 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 50 predicate places. [2023-01-27 17:42:53,457 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 75 transitions, 554 flow [2023-01-27 17:42:53,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 129.42857142857142) internal successors, (906), 7 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:42:53,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:42:53,458 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:42:53,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-27 17:42:53,458 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 17:42:53,458 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:42:53,458 INFO L85 PathProgramCache]: Analyzing trace with hash 566216759, now seen corresponding path program 1 times [2023-01-27 17:42:53,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:42:53,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3370525] [2023-01-27 17:42:53,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:42:53,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:42:53,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:42:53,472 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 17:42:53,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 17:42:53,508 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 17:42:53,508 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 17:42:53,509 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2023-01-27 17:42:53,510 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2023-01-27 17:42:53,510 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2023-01-27 17:42:53,510 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-01-27 17:42:53,510 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-01-27 17:42:53,510 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-01-27 17:42:53,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-01-27 17:42:53,511 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:42:53,514 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-27 17:42:53,514 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-27 17:42:53,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.01 05:42:53 BasicIcfg [2023-01-27 17:42:53,569 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-27 17:42:53,569 INFO L158 Benchmark]: Toolchain (without parser) took 8580.72ms. Allocated memory was 343.9MB in the beginning and 497.0MB in the end (delta: 153.1MB). Free memory was 310.9MB in the beginning and 201.6MB in the end (delta: 109.2MB). Peak memory consumption was 264.4MB. Max. memory is 16.0GB. [2023-01-27 17:42:53,569 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 255.9MB. Free memory is still 213.5MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-27 17:42:53,569 INFO L158 Benchmark]: CACSL2BoogieTranslator took 415.43ms. Allocated memory is still 343.9MB. Free memory was 310.9MB in the beginning and 281.7MB in the end (delta: 29.2MB). Peak memory consumption was 29.4MB. Max. memory is 16.0GB. [2023-01-27 17:42:53,570 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.70ms. Allocated memory is still 343.9MB. Free memory was 281.7MB in the beginning and 279.0MB in the end (delta: 2.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2023-01-27 17:42:53,570 INFO L158 Benchmark]: Boogie Preprocessor took 34.02ms. Allocated memory is still 343.9MB. Free memory was 279.0MB in the beginning and 277.3MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.0GB. [2023-01-27 17:42:53,570 INFO L158 Benchmark]: RCFGBuilder took 406.75ms. Allocated memory is still 343.9MB. Free memory was 277.3MB in the beginning and 259.8MB in the end (delta: 17.5MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-01-27 17:42:53,570 INFO L158 Benchmark]: TraceAbstraction took 7686.41ms. Allocated memory was 343.9MB in the beginning and 497.0MB in the end (delta: 153.1MB). Free memory was 259.0MB in the beginning and 201.6MB in the end (delta: 57.4MB). Peak memory consumption was 212.0MB. Max. memory is 16.0GB. [2023-01-27 17:42:53,571 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 255.9MB. Free memory is still 213.5MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 415.43ms. Allocated memory is still 343.9MB. Free memory was 310.9MB in the beginning and 281.7MB in the end (delta: 29.2MB). Peak memory consumption was 29.4MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 32.70ms. Allocated memory is still 343.9MB. Free memory was 281.7MB in the beginning and 279.0MB in the end (delta: 2.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * Boogie Preprocessor took 34.02ms. Allocated memory is still 343.9MB. Free memory was 279.0MB in the beginning and 277.3MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 406.75ms. Allocated memory is still 343.9MB. Free memory was 277.3MB in the beginning and 259.8MB in the end (delta: 17.5MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * TraceAbstraction took 7686.41ms. Allocated memory was 343.9MB in the beginning and 497.0MB in the end (delta: 153.1MB). Free memory was 259.0MB in the beginning and 201.6MB in the end (delta: 57.4MB). Peak memory consumption was 212.0MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.6s, 144 PlacesBefore, 35 PlacesAfterwards, 147 TransitionsBefore, 33 TransitionsAfterwards, 7334 CoEnabledTransitionPairs, 6 FixpointIterations, 26 TrivialSequentialCompositions, 83 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 21 ConcurrentYvCompositions, 5 ChoiceCompositions, 135 TotalNumberOfCompositions, 10082 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 7371, independent: 7178, independent conditional: 0, independent unconditional: 7178, dependent: 193, dependent conditional: 0, dependent unconditional: 193, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 4167, independent: 4119, independent conditional: 0, independent unconditional: 4119, dependent: 48, dependent conditional: 0, dependent unconditional: 48, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 7371, independent: 3059, independent conditional: 0, independent unconditional: 3059, dependent: 145, dependent conditional: 0, dependent unconditional: 145, unknown: 4167, unknown conditional: 0, unknown unconditional: 4167] , Statistics on independence cache: Total cache size (in pairs): 178, Positive cache size: 162, Positive conditional cache size: 0, Positive unconditional cache size: 162, Negative cache size: 16, Negative conditional cache size: 0, Negative unconditional cache size: 16, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 940]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L935] 0 static int top=0; [L936] 0 static unsigned int arr[(400)]; [L937] 0 pthread_mutex_t m; [L938] 0 _Bool flag=(0); [L1019] 0 pthread_t id1, id2; [L1021] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arr={3:0}, flag=0, id1={7:0}, id2={5:0}, m={4:0}, pthread_create(&id1, ((void *)0), t1, ((void *)0))=9, top=0] [L988] 1 int i; [L989] 1 unsigned int tmp; [L990] 1 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L1022] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arr={3:0}, flag=0, id1={7:0}, id2={5:0}, m={4:0}, pthread_create(&id2, ((void *)0), t2, ((void *)0))=10, top=0] [L990] COND TRUE 1 i<(400) [L993] 1 tmp = __VERIFIER_nondet_uint() [L994] CALL 1 assume_abort_if_not(tmp < (400)) [L23] COND FALSE 1 !(!cond) [L994] RET 1 assume_abort_if_not(tmp < (400)) [L995] CALL, EXPR 1 push(arr,tmp) [L1004] 2 int i; [L1005] 2 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L960] COND FALSE 1 !(top==(400)) [L967] CALL, EXPR 1 get_top() [L952] 1 return top; [L967] RET, EXPR 1 get_top() [L967] 1 stack[get_top()] = x [L968] CALL 1 inc_top() [L944] 1 top++ [L968] RET 1 inc_top() [L970] 1 return 0; [L995] RET, EXPR 1 push(arr,tmp) [L995] COND FALSE 1 !(push(arr,tmp)==(-1)) [L997] 1 flag=(1) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, tmp=0, top=1] [L990] 1 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, tmp=0, top=1] [L1005] COND TRUE 2 i<(400) [L1008] COND TRUE 2 \read(flag) [L1010] CALL, EXPR 2 pop(arr) [L974] CALL, EXPR 2 get_top() [L952] 2 return top; [L974] RET, EXPR 2 get_top() [L974] COND FALSE 2 !(get_top()==0) [L981] CALL 2 dec_top() [L948] 2 top-- VAL [arr={3:0}, flag=1, m={4:0}, top=0] [L981] RET 2 dec_top() [L982] CALL, EXPR 2 get_top() [L952] 2 return top; VAL [\result=0, \result=0, arr={3:0}, flag=1, m={4:0}, top=0] [L982] RET, EXPR 2 get_top() [L982] EXPR 2 stack[get_top()] [L982] 2 return stack[get_top()]; [L1010] RET, EXPR 2 pop(arr) [L1010] COND FALSE 2 !(!(pop(arr)!=(-2))) [L1005] 2 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1005] COND TRUE 2 i<(400) [L1008] COND TRUE 2 \read(flag) [L1010] CALL, EXPR 2 pop(arr) [L974] CALL, EXPR 2 get_top() [L952] 2 return top; [L974] RET, EXPR 2 get_top() [L974] COND TRUE 2 get_top()==0 [L977] 2 return (-2); [L1010] RET, EXPR 2 pop(arr) [L1010] COND TRUE 2 !(pop(arr)!=(-2)) [L1011] CALL 2 error() [L940] 2 reach_error() VAL [arr={3:0}, flag=1, m={4:0}, top=0] - UnprovableResult [Line: 1021]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1022]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 940]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 250 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 7.5s, OverallIterations: 10, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.7s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 504 SdHoareTripleChecker+Valid, 1.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 504 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 1.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 23 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2054 IncrementalHoareTripleChecker+Invalid, 2077 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 23 mSolverCounterUnsat, 0 mSDtfsCounter, 2054 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 85 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=554occurred in iteration=9, InterpolantAutomatonStates: 54, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 183 NumberOfCodeBlocks, 183 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 160 ConstructedInterpolants, 0 QuantifiedInterpolants, 1523 SizeOfPredicates, 1 NumberOfNonLiveVariables, 188 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 11 InterpolantComputations, 8 PerfectInterpolantSequences, 6/12 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-01-27 17:42:53,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...