/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/goblint-regression/28-race_reach_21-deref_read_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 19:12:37,037 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 19:12:37,038 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 19:12:37,056 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 19:12:37,056 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 19:12:37,057 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 19:12:37,058 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 19:12:37,059 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 19:12:37,060 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 19:12:37,060 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 19:12:37,061 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 19:12:37,062 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 19:12:37,062 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 19:12:37,063 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 19:12:37,063 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 19:12:37,064 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 19:12:37,065 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 19:12:37,065 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 19:12:37,066 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 19:12:37,067 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 19:12:37,068 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 19:12:37,069 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 19:12:37,069 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 19:12:37,070 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 19:12:37,086 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-27 19:12:37,091 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 19:12:37,092 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 19:12:37,092 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 19:12:37,093 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 19:12:37,105 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 19:12:37,106 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 19:12:37,106 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 19:12:37,106 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 19:12:37,107 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 19:12:37,107 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 19:12:37,107 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 19:12:37,107 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 19:12:37,107 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 19:12:37,108 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 19:12:37,108 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 19:12:37,108 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 19:12:37,108 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 19:12:37,108 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 19:12:37,110 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 19:12:37,111 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 19:12:37,111 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 19:12:37,111 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 19:12:37,111 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 19:12:37,111 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 19:12:37,111 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 19:12:37,112 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 19:12:37,112 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 19:12:37,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 19:12:37,112 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 19:12:37,112 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 19:12:37,112 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 19:12:37,112 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 19:12:37,113 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 19:12:37,113 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 19:12:37,113 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 19:12:37,113 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 19:12:37,304 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 19:12:37,328 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 19:12:37,330 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 19:12:37,331 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 19:12:37,332 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 19:12:37,335 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_21-deref_read_racing.i [2023-01-27 19:12:38,455 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 19:12:38,629 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 19:12:38,630 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_21-deref_read_racing.i [2023-01-27 19:12:38,637 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cad92b765/6fd4195690a94efc9b8b0e3b70469b34/FLAG37b1acae5 [2023-01-27 19:12:38,663 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cad92b765/6fd4195690a94efc9b8b0e3b70469b34 [2023-01-27 19:12:38,664 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 19:12:38,665 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 19:12:38,666 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 19:12:38,666 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 19:12:38,668 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 19:12:38,669 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 07:12:38" (1/1) ... [2023-01-27 19:12:38,669 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6040b876 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:12:38, skipping insertion in model container [2023-01-27 19:12:38,669 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 07:12:38" (1/1) ... [2023-01-27 19:12:38,674 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 19:12:38,694 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 19:12:38,855 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_21-deref_read_racing.i[30176,30189] [2023-01-27 19:12:38,867 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 19:12:38,875 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 19:12:38,896 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_21-deref_read_racing.i[30176,30189] [2023-01-27 19:12:38,900 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 19:12:38,925 INFO L208 MainTranslator]: Completed translation [2023-01-27 19:12:38,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:12:38 WrapperNode [2023-01-27 19:12:38,926 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 19:12:38,927 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 19:12:38,927 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 19:12:38,927 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 19:12:38,931 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:12:38" (1/1) ... [2023-01-27 19:12:38,940 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:12:38" (1/1) ... [2023-01-27 19:12:38,953 INFO L138 Inliner]: procedures = 170, calls = 35, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2023-01-27 19:12:38,953 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 19:12:38,954 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 19:12:38,954 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 19:12:38,954 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 19:12:38,959 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:12:38" (1/1) ... [2023-01-27 19:12:38,959 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:12:38" (1/1) ... [2023-01-27 19:12:38,961 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:12:38" (1/1) ... [2023-01-27 19:12:38,961 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:12:38" (1/1) ... [2023-01-27 19:12:38,964 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:12:38" (1/1) ... [2023-01-27 19:12:38,967 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:12:38" (1/1) ... [2023-01-27 19:12:38,968 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:12:38" (1/1) ... [2023-01-27 19:12:38,969 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:12:38" (1/1) ... [2023-01-27 19:12:38,970 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 19:12:38,971 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 19:12:38,971 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 19:12:38,971 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 19:12:38,971 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:12:38" (1/1) ... [2023-01-27 19:12:38,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 19:12:38,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:12:38,999 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 19:12:39,004 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 19:12:39,035 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 19:12:39,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 19:12:39,035 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-01-27 19:12:39,035 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 19:12:39,035 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 19:12:39,035 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-01-27 19:12:39,035 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-01-27 19:12:39,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 19:12:39,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 19:12:39,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 19:12:39,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 19:12:39,038 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 19:12:39,184 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 19:12:39,185 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 19:12:39,372 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 19:12:39,377 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 19:12:39,377 INFO L302 CfgBuilder]: Removed 9 assume(true) statements. [2023-01-27 19:12:39,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 07:12:39 BoogieIcfgContainer [2023-01-27 19:12:39,379 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 19:12:39,380 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 19:12:39,380 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 19:12:39,385 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 19:12:39,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 07:12:38" (1/3) ... [2023-01-27 19:12:39,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dbcbca1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 07:12:39, skipping insertion in model container [2023-01-27 19:12:39,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:12:38" (2/3) ... [2023-01-27 19:12:39,386 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dbcbca1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 07:12:39, skipping insertion in model container [2023-01-27 19:12:39,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 07:12:39" (3/3) ... [2023-01-27 19:12:39,387 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_21-deref_read_racing.i [2023-01-27 19:12:39,430 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 19:12:39,430 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-27 19:12:39,430 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 19:12:39,461 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 19:12:39,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 97 transitions, 199 flow [2023-01-27 19:12:39,527 INFO L130 PetriNetUnfolder]: 14/125 cut-off events. [2023-01-27 19:12:39,527 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:12:39,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 125 events. 14/125 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 265 event pairs, 0 based on Foata normal form. 0/107 useless extension candidates. Maximal degree in co-relation 65. Up to 4 conditions per place. [2023-01-27 19:12:39,531 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 97 transitions, 199 flow [2023-01-27 19:12:39,534 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 90 places, 97 transitions, 199 flow [2023-01-27 19:12:39,537 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:12:39,543 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 90 places, 97 transitions, 199 flow [2023-01-27 19:12:39,545 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 90 places, 97 transitions, 199 flow [2023-01-27 19:12:39,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 97 transitions, 199 flow [2023-01-27 19:12:39,564 INFO L130 PetriNetUnfolder]: 14/125 cut-off events. [2023-01-27 19:12:39,564 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:12:39,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 125 events. 14/125 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 265 event pairs, 0 based on Foata normal form. 0/107 useless extension candidates. Maximal degree in co-relation 65. Up to 4 conditions per place. [2023-01-27 19:12:39,567 INFO L119 LiptonReduction]: Number of co-enabled transitions 2176 [2023-01-27 19:12:41,451 INFO L134 LiptonReduction]: Checked pairs total: 3921 [2023-01-27 19:12:41,452 INFO L136 LiptonReduction]: Total number of compositions: 82 [2023-01-27 19:12:41,464 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:12:41,468 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;@60c29697, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:12:41,468 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-27 19:12:41,471 INFO L130 PetriNetUnfolder]: 0/8 cut-off events. [2023-01-27 19:12:41,471 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:12:41,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:12:41,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-27 19:12:41,472 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:12:41,475 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:12:41,476 INFO L85 PathProgramCache]: Analyzing trace with hash 11721076, now seen corresponding path program 1 times [2023-01-27 19:12:41,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:12:41,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259116791] [2023-01-27 19:12:41,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:12:41,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:12:41,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:12:41,649 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 19:12:41,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:12:41,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259116791] [2023-01-27 19:12:41,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259116791] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:12:41,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:12:41,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:12:41,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845008638] [2023-01-27 19:12:41,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:12:41,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:12:41,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:12:41,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:12:41,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:12:41,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 179 [2023-01-27 19:12:41,679 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 29 transitions, 63 flow. Second operand has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 0 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 19:12:41,679 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:12:41,679 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 179 [2023-01-27 19:12:41,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:12:41,756 INFO L130 PetriNetUnfolder]: 63/156 cut-off events. [2023-01-27 19:12:41,757 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:12:41,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 308 conditions, 156 events. 63/156 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 476 event pairs, 48 based on Foata normal form. 16/152 useless extension candidates. Maximal degree in co-relation 293. Up to 134 conditions per place. [2023-01-27 19:12:41,758 INFO L137 encePairwiseOnDemand]: 168/179 looper letters, 24 selfloop transitions, 2 changer transitions 2/31 dead transitions. [2023-01-27 19:12:41,758 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 31 transitions, 123 flow [2023-01-27 19:12:41,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:12:41,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:12:41,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 277 transitions. [2023-01-27 19:12:41,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.515828677839851 [2023-01-27 19:12:41,769 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 277 transitions. [2023-01-27 19:12:41,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 277 transitions. [2023-01-27 19:12:41,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:12:41,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 277 transitions. [2023-01-27 19:12:41,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.33333333333333) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 0 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 19:12:41,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 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 19:12:41,777 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 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 19:12:41,778 INFO L175 Difference]: Start difference. First operand has 24 places, 29 transitions, 63 flow. Second operand 3 states and 277 transitions. [2023-01-27 19:12:41,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 31 transitions, 123 flow [2023-01-27 19:12:41,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 31 transitions, 123 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 19:12:41,780 INFO L231 Difference]: Finished difference. Result has 27 places, 19 transitions, 51 flow [2023-01-27 19:12:41,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=47, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=51, PETRI_PLACES=27, PETRI_TRANSITIONS=19} [2023-01-27 19:12:41,784 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 3 predicate places. [2023-01-27 19:12:41,784 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 19 transitions, 51 flow [2023-01-27 19:12:41,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 0 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 19:12:41,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:12:41,785 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-01-27 19:12:41,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 19:12:41,785 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:12:41,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:12:41,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1609564972, now seen corresponding path program 1 times [2023-01-27 19:12:41,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:12:41,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570072139] [2023-01-27 19:12:41,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:12:41,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:12:41,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:12:41,806 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:12:41,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:12:41,829 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:12:41,829 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:12:41,830 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-01-27 19:12:41,831 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-01-27 19:12:41,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 19:12:41,832 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-01-27 19:12:41,833 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:12:41,833 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-01-27 19:12:41,843 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 19:12:41,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 119 places, 130 transitions, 272 flow [2023-01-27 19:12:41,860 INFO L130 PetriNetUnfolder]: 24/191 cut-off events. [2023-01-27 19:12:41,861 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 19:12:41,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201 conditions, 191 events. 24/191 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 501 event pairs, 0 based on Foata normal form. 0/161 useless extension candidates. Maximal degree in co-relation 126. Up to 6 conditions per place. [2023-01-27 19:12:41,862 INFO L82 GeneralOperation]: Start removeDead. Operand has 119 places, 130 transitions, 272 flow [2023-01-27 19:12:41,863 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 119 places, 130 transitions, 272 flow [2023-01-27 19:12:41,863 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:12:41,863 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 119 places, 130 transitions, 272 flow [2023-01-27 19:12:41,863 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 119 places, 130 transitions, 272 flow [2023-01-27 19:12:41,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 119 places, 130 transitions, 272 flow [2023-01-27 19:12:41,876 INFO L130 PetriNetUnfolder]: 24/191 cut-off events. [2023-01-27 19:12:41,877 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 19:12:41,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201 conditions, 191 events. 24/191 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 501 event pairs, 0 based on Foata normal form. 0/161 useless extension candidates. Maximal degree in co-relation 126. Up to 6 conditions per place. [2023-01-27 19:12:41,881 INFO L119 LiptonReduction]: Number of co-enabled transitions 6464 [2023-01-27 19:12:43,971 INFO L134 LiptonReduction]: Checked pairs total: 13307 [2023-01-27 19:12:43,971 INFO L136 LiptonReduction]: Total number of compositions: 102 [2023-01-27 19:12:43,973 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:12:43,973 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;@60c29697, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:12:43,974 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-27 19:12:43,975 INFO L130 PetriNetUnfolder]: 0/8 cut-off events. [2023-01-27 19:12:43,975 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:12:43,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:12:43,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-27 19:12:43,975 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:12:43,976 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:12:43,976 INFO L85 PathProgramCache]: Analyzing trace with hash 19871269, now seen corresponding path program 1 times [2023-01-27 19:12:43,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:12:43,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669824993] [2023-01-27 19:12:43,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:12:43,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:12:43,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:12:44,009 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 19:12:44,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:12:44,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669824993] [2023-01-27 19:12:44,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669824993] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:12:44,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:12:44,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:12:44,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829972421] [2023-01-27 19:12:44,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:12:44,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:12:44,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:12:44,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:12:44,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:12:44,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 232 [2023-01-27 19:12:44,012 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 48 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 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 19:12:44,020 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:12:44,021 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 232 [2023-01-27 19:12:44,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:12:44,166 INFO L130 PetriNetUnfolder]: 1271/2276 cut-off events. [2023-01-27 19:12:44,166 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2023-01-27 19:12:44,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4405 conditions, 2276 events. 1271/2276 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 12826 event pairs, 560 based on Foata normal form. 320/2356 useless extension candidates. Maximal degree in co-relation 419. Up to 2062 conditions per place. [2023-01-27 19:12:44,176 INFO L137 encePairwiseOnDemand]: 215/232 looper letters, 34 selfloop transitions, 2 changer transitions 2/45 dead transitions. [2023-01-27 19:12:44,176 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 45 transitions, 178 flow [2023-01-27 19:12:44,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:12:44,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:12:44,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 371 transitions. [2023-01-27 19:12:44,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5330459770114943 [2023-01-27 19:12:44,178 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 371 transitions. [2023-01-27 19:12:44,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 371 transitions. [2023-01-27 19:12:44,179 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:12:44,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 371 transitions. [2023-01-27 19:12:44,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 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 19:12:44,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 0 states have call successors, (0), 0 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 19:12:44,182 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 232.0) internal successors, (928), 4 states have internal predecessors, (928), 0 states have call successors, (0), 0 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 19:12:44,183 INFO L175 Difference]: Start difference. First operand has 39 places, 48 transitions, 108 flow. Second operand 3 states and 371 transitions. [2023-01-27 19:12:44,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 45 transitions, 178 flow [2023-01-27 19:12:44,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 45 transitions, 176 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-01-27 19:12:44,184 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 86 flow [2023-01-27 19:12:44,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=232, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2023-01-27 19:12:44,185 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 3 predicate places. [2023-01-27 19:12:44,185 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 86 flow [2023-01-27 19:12:44,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 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 19:12:44,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:12:44,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:12:44,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-27 19:12:44,185 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:12:44,186 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:12:44,186 INFO L85 PathProgramCache]: Analyzing trace with hash 993905498, now seen corresponding path program 1 times [2023-01-27 19:12:44,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:12:44,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733701364] [2023-01-27 19:12:44,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:12:44,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:12:44,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:12:44,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:12:44,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:12:44,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733701364] [2023-01-27 19:12:44,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733701364] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:12:44,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136231750] [2023-01-27 19:12:44,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:12:44,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:12:44,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:12:44,260 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 19:12:44,274 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 19:12:44,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:12:44,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-27 19:12:44,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:12:44,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:12:44,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:12:44,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:12:44,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136231750] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:12:44,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:12:44,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-27 19:12:44,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454240045] [2023-01-27 19:12:44,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:12:44,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 19:12:44,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:12:44,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 19:12:44,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-27 19:12:44,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 232 [2023-01-27 19:12:44,406 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 33 transitions, 86 flow. Second operand has 7 states, 7 states have (on average 106.28571428571429) internal successors, (744), 7 states have internal predecessors, (744), 0 states have call successors, (0), 0 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 19:12:44,406 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:12:44,406 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 232 [2023-01-27 19:12:44,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:12:44,521 INFO L130 PetriNetUnfolder]: 421/832 cut-off events. [2023-01-27 19:12:44,521 INFO L131 PetriNetUnfolder]: For 132/132 co-relation queries the response was YES. [2023-01-27 19:12:44,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1794 conditions, 832 events. 421/832 cut-off events. For 132/132 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 4166 event pairs, 80 based on Foata normal form. 100/930 useless extension candidates. Maximal degree in co-relation 1540. Up to 502 conditions per place. [2023-01-27 19:12:44,525 INFO L137 encePairwiseOnDemand]: 229/232 looper letters, 48 selfloop transitions, 3 changer transitions 0/58 dead transitions. [2023-01-27 19:12:44,525 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 58 transitions, 236 flow [2023-01-27 19:12:44,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 19:12:44,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 19:12:44,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 573 transitions. [2023-01-27 19:12:44,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4939655172413793 [2023-01-27 19:12:44,527 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 573 transitions. [2023-01-27 19:12:44,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 573 transitions. [2023-01-27 19:12:44,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:12:44,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 573 transitions. [2023-01-27 19:12:44,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 114.6) internal successors, (573), 5 states have internal predecessors, (573), 0 states have call successors, (0), 0 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 19:12:44,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 232.0) internal successors, (1392), 6 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:12:44,531 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 232.0) internal successors, (1392), 6 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:12:44,532 INFO L175 Difference]: Start difference. First operand has 42 places, 33 transitions, 86 flow. Second operand 5 states and 573 transitions. [2023-01-27 19:12:44,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 58 transitions, 236 flow [2023-01-27 19:12:44,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 58 transitions, 234 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 19:12:44,533 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 82 flow [2023-01-27 19:12:44,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=232, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2023-01-27 19:12:44,534 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 1 predicate places. [2023-01-27 19:12:44,534 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 82 flow [2023-01-27 19:12:44,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 106.28571428571429) internal successors, (744), 7 states have internal predecessors, (744), 0 states have call successors, (0), 0 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 19:12:44,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:12:44,535 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-01-27 19:12:44,555 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-01-27 19:12:44,756 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 19:12:44,756 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:12:44,757 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:12:44,757 INFO L85 PathProgramCache]: Analyzing trace with hash 687650153, now seen corresponding path program 1 times [2023-01-27 19:12:44,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:12:44,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731899602] [2023-01-27 19:12:44,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:12:44,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:12:44,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:12:44,768 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:12:44,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:12:44,779 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:12:44,779 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:12:44,779 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-01-27 19:12:44,779 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-01-27 19:12:44,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-27 19:12:44,780 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-01-27 19:12:44,780 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:12:44,780 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-01-27 19:12:44,794 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 19:12:44,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 163 transitions, 347 flow [2023-01-27 19:12:44,813 INFO L130 PetriNetUnfolder]: 34/257 cut-off events. [2023-01-27 19:12:44,813 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-27 19:12:44,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 257 events. 34/257 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 734 event pairs, 0 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 195. Up to 8 conditions per place. [2023-01-27 19:12:44,814 INFO L82 GeneralOperation]: Start removeDead. Operand has 148 places, 163 transitions, 347 flow [2023-01-27 19:12:44,815 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 148 places, 163 transitions, 347 flow [2023-01-27 19:12:44,815 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:12:44,815 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 148 places, 163 transitions, 347 flow [2023-01-27 19:12:44,816 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 148 places, 163 transitions, 347 flow [2023-01-27 19:12:44,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 163 transitions, 347 flow [2023-01-27 19:12:44,832 INFO L130 PetriNetUnfolder]: 34/257 cut-off events. [2023-01-27 19:12:44,833 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-27 19:12:44,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 257 events. 34/257 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 734 event pairs, 0 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 195. Up to 8 conditions per place. [2023-01-27 19:12:44,839 INFO L119 LiptonReduction]: Number of co-enabled transitions 12864 [2023-01-27 19:12:46,964 INFO L134 LiptonReduction]: Checked pairs total: 27808 [2023-01-27 19:12:46,965 INFO L136 LiptonReduction]: Total number of compositions: 120 [2023-01-27 19:12:46,966 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:12:46,966 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;@60c29697, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:12:46,967 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-27 19:12:46,968 INFO L130 PetriNetUnfolder]: 0/8 cut-off events. [2023-01-27 19:12:46,968 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:12:46,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:12:46,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-27 19:12:46,968 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:12:46,969 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:12:46,969 INFO L85 PathProgramCache]: Analyzing trace with hash 29589930, now seen corresponding path program 1 times [2023-01-27 19:12:46,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:12:46,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826006468] [2023-01-27 19:12:46,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:12:46,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:12:46,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:12:46,986 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 19:12:46,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:12:46,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826006468] [2023-01-27 19:12:46,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826006468] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:12:46,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:12:46,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:12:46,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677205509] [2023-01-27 19:12:46,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:12:46,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:12:46,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:12:46,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:12:46,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:12:46,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 283 [2023-01-27 19:12:46,989 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 66 transitions, 153 flow. Second operand has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 0 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 19:12:46,989 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:12:46,989 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 283 [2023-01-27 19:12:46,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:12:48,698 INFO L130 PetriNetUnfolder]: 17895/26602 cut-off events. [2023-01-27 19:12:48,698 INFO L131 PetriNetUnfolder]: For 597/597 co-relation queries the response was YES. [2023-01-27 19:12:48,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52210 conditions, 26602 events. 17895/26602 cut-off events. For 597/597 co-relation queries the response was YES. Maximal size of possible extension queue 734. Compared 173454 event pairs, 17081 based on Foata normal form. 4496/29060 useless extension candidates. Maximal degree in co-relation 20257. Up to 25159 conditions per place. [2023-01-27 19:12:48,792 INFO L137 encePairwiseOnDemand]: 260/283 looper letters, 42 selfloop transitions, 2 changer transitions 2/56 dead transitions. [2023-01-27 19:12:48,792 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 56 transitions, 225 flow [2023-01-27 19:12:48,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:12:48,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:12:48,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 463 transitions. [2023-01-27 19:12:48,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5453474676089517 [2023-01-27 19:12:48,794 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 463 transitions. [2023-01-27 19:12:48,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 463 transitions. [2023-01-27 19:12:48,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:12:48,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 463 transitions. [2023-01-27 19:12:48,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 0 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 19:12:48,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 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 19:12:48,797 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 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 19:12:48,797 INFO L175 Difference]: Start difference. First operand has 53 places, 66 transitions, 153 flow. Second operand 3 states and 463 transitions. [2023-01-27 19:12:48,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 56 transitions, 225 flow [2023-01-27 19:12:48,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 56 transitions, 219 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-01-27 19:12:48,800 INFO L231 Difference]: Finished difference. Result has 56 places, 45 transitions, 115 flow [2023-01-27 19:12:48,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=56, PETRI_TRANSITIONS=45} [2023-01-27 19:12:48,802 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 3 predicate places. [2023-01-27 19:12:48,802 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 45 transitions, 115 flow [2023-01-27 19:12:48,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 0 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 19:12:48,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:12:48,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:12:48,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-27 19:12:48,804 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:12:48,804 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:12:48,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1770709152, now seen corresponding path program 1 times [2023-01-27 19:12:48,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:12:48,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457958398] [2023-01-27 19:12:48,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:12:48,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:12:48,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:12:48,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:12:48,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:12:48,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457958398] [2023-01-27 19:12:48,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457958398] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:12:48,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558239130] [2023-01-27 19:12:48,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:12:48,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:12:48,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:12:48,855 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:12:48,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-27 19:12:48,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:12:48,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-27 19:12:48,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:12:48,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:12:48,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:12:48,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:12:48,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558239130] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:12:48,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:12:48,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-27 19:12:48,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261475427] [2023-01-27 19:12:48,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:12:48,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 19:12:48,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:12:48,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 19:12:48,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-27 19:12:48,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 283 [2023-01-27 19:12:48,966 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 45 transitions, 115 flow. Second operand has 7 states, 7 states have (on average 132.28571428571428) internal successors, (926), 7 states have internal predecessors, (926), 0 states have call successors, (0), 0 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 19:12:48,966 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:12:48,966 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 283 [2023-01-27 19:12:48,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:12:49,617 INFO L130 PetriNetUnfolder]: 6205/10127 cut-off events. [2023-01-27 19:12:49,617 INFO L131 PetriNetUnfolder]: For 1027/1027 co-relation queries the response was YES. [2023-01-27 19:12:49,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21096 conditions, 10127 events. 6205/10127 cut-off events. For 1027/1027 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 67684 event pairs, 77 based on Foata normal form. 909/11035 useless extension candidates. Maximal degree in co-relation 18622. Up to 5958 conditions per place. [2023-01-27 19:12:49,659 INFO L137 encePairwiseOnDemand]: 280/283 looper letters, 82 selfloop transitions, 4 changer transitions 0/96 dead transitions. [2023-01-27 19:12:49,659 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 96 transitions, 389 flow [2023-01-27 19:12:49,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 19:12:49,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 19:12:49,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 869 transitions. [2023-01-27 19:12:49,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5117785630153121 [2023-01-27 19:12:49,661 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 869 transitions. [2023-01-27 19:12:49,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 869 transitions. [2023-01-27 19:12:49,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:12:49,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 869 transitions. [2023-01-27 19:12:49,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 144.83333333333334) internal successors, (869), 6 states have internal predecessors, (869), 0 states have call successors, (0), 0 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 19:12:49,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 283.0) internal successors, (1981), 7 states have internal predecessors, (1981), 0 states have call successors, (0), 0 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 19:12:49,666 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 283.0) internal successors, (1981), 7 states have internal predecessors, (1981), 0 states have call successors, (0), 0 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 19:12:49,666 INFO L175 Difference]: Start difference. First operand has 56 places, 45 transitions, 115 flow. Second operand 6 states and 869 transitions. [2023-01-27 19:12:49,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 96 transitions, 389 flow [2023-01-27 19:12:49,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 96 transitions, 387 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 19:12:49,669 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 117 flow [2023-01-27 19:12:49,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=117, PETRI_PLACES=55, PETRI_TRANSITIONS=43} [2023-01-27 19:12:49,670 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 2 predicate places. [2023-01-27 19:12:49,672 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 117 flow [2023-01-27 19:12:49,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 132.28571428571428) internal successors, (926), 7 states have internal predecessors, (926), 0 states have call successors, (0), 0 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 19:12:49,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:12:49,672 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-01-27 19:12:49,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-27 19:12:49,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-01-27 19:12:49,877 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:12:49,877 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:12:49,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1694388675, now seen corresponding path program 1 times [2023-01-27 19:12:49,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:12:49,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055518175] [2023-01-27 19:12:49,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:12:49,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:12:49,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:12:49,892 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:12:49,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:12:49,908 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:12:49,908 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:12:49,909 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-01-27 19:12:49,909 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-01-27 19:12:49,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-27 19:12:49,909 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-01-27 19:12:49,909 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:12:49,910 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-01-27 19:12:49,932 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 19:12:49,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 177 places, 196 transitions, 424 flow [2023-01-27 19:12:49,960 INFO L130 PetriNetUnfolder]: 44/323 cut-off events. [2023-01-27 19:12:49,960 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-01-27 19:12:49,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 346 conditions, 323 events. 44/323 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 978 event pairs, 0 based on Foata normal form. 0/269 useless extension candidates. Maximal degree in co-relation 265. Up to 10 conditions per place. [2023-01-27 19:12:49,962 INFO L82 GeneralOperation]: Start removeDead. Operand has 177 places, 196 transitions, 424 flow [2023-01-27 19:12:49,963 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 177 places, 196 transitions, 424 flow [2023-01-27 19:12:49,963 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:12:49,963 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 177 places, 196 transitions, 424 flow [2023-01-27 19:12:49,964 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 177 places, 196 transitions, 424 flow [2023-01-27 19:12:49,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 177 places, 196 transitions, 424 flow [2023-01-27 19:12:49,987 INFO L130 PetriNetUnfolder]: 44/323 cut-off events. [2023-01-27 19:12:49,987 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2023-01-27 19:12:49,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 346 conditions, 323 events. 44/323 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 978 event pairs, 0 based on Foata normal form. 0/269 useless extension candidates. Maximal degree in co-relation 265. Up to 10 conditions per place. [2023-01-27 19:12:49,999 INFO L119 LiptonReduction]: Number of co-enabled transitions 21376 [2023-01-27 19:12:52,195 INFO L134 LiptonReduction]: Checked pairs total: 49294 [2023-01-27 19:12:52,195 INFO L136 LiptonReduction]: Total number of compositions: 142 [2023-01-27 19:12:52,196 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:12:52,197 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;@60c29697, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:12:52,197 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-27 19:12:52,198 INFO L130 PetriNetUnfolder]: 0/8 cut-off events. [2023-01-27 19:12:52,198 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:12:52,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:12:52,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-27 19:12:52,199 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:12:52,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:12:52,199 INFO L85 PathProgramCache]: Analyzing trace with hash 41007756, now seen corresponding path program 1 times [2023-01-27 19:12:52,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:12:52,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757493556] [2023-01-27 19:12:52,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:12:52,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:12:52,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:12:52,234 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 19:12:52,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:12:52,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757493556] [2023-01-27 19:12:52,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757493556] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:12:52,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:12:52,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:12:52,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48099748] [2023-01-27 19:12:52,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:12:52,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:12:52,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:12:52,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:12:52,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:12:52,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 338 [2023-01-27 19:12:52,238 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 84 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 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 19:12:52,238 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:12:52,238 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 338 [2023-01-27 19:12:52,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:13:21,343 INFO L130 PetriNetUnfolder]: 400899/521434 cut-off events. [2023-01-27 19:13:21,343 INFO L131 PetriNetUnfolder]: For 13880/13880 co-relation queries the response was YES. [2023-01-27 19:13:21,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1046823 conditions, 521434 events. 400899/521434 cut-off events. For 13880/13880 co-relation queries the response was YES. Maximal size of possible extension queue 9189. Compared 3402846 event pairs, 295500 based on Foata normal form. 54304/545408 useless extension candidates. Maximal degree in co-relation 83600. Up to 518010 conditions per place. [2023-01-27 19:13:23,524 INFO L137 encePairwiseOnDemand]: 309/338 looper letters, 58 selfloop transitions, 2 changer transitions 2/69 dead transitions. [2023-01-27 19:13:23,524 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 69 transitions, 294 flow [2023-01-27 19:13:23,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:13:23,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:13:23,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 563 transitions. [2023-01-27 19:13:23,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5552268244575936 [2023-01-27 19:13:23,526 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 563 transitions. [2023-01-27 19:13:23,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 563 transitions. [2023-01-27 19:13:23,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:13:23,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 563 transitions. [2023-01-27 19:13:23,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 0 states have call successors, (0), 0 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 19:13:23,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 338.0) internal successors, (1352), 4 states have internal predecessors, (1352), 0 states have call successors, (0), 0 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 19:13:23,529 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 338.0) internal successors, (1352), 4 states have internal predecessors, (1352), 0 states have call successors, (0), 0 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 19:13:23,529 INFO L175 Difference]: Start difference. First operand has 67 places, 84 transitions, 200 flow. Second operand 3 states and 563 transitions. [2023-01-27 19:13:23,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 69 transitions, 294 flow [2023-01-27 19:13:23,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 69 transitions, 282 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-01-27 19:13:23,537 INFO L231 Difference]: Finished difference. Result has 70 places, 57 transitions, 144 flow [2023-01-27 19:13:23,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=70, PETRI_TRANSITIONS=57} [2023-01-27 19:13:23,538 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 3 predicate places. [2023-01-27 19:13:23,538 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 57 transitions, 144 flow [2023-01-27 19:13:23,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 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 19:13:23,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:13:23,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:13:23,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-27 19:13:23,538 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:13:23,539 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:13:23,539 INFO L85 PathProgramCache]: Analyzing trace with hash -520681998, now seen corresponding path program 1 times [2023-01-27 19:13:23,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:13:23,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843044632] [2023-01-27 19:13:23,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:13:23,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:13:23,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:13:23,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:13:23,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:13:23,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843044632] [2023-01-27 19:13:23,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843044632] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:13:23,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853236183] [2023-01-27 19:13:23,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:13:23,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:13:23,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:13:23,562 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:13:23,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-27 19:13:23,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:13:23,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-27 19:13:23,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:13:23,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:13:23,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:13:23,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:13:23,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853236183] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:13:23,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:13:23,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-27 19:13:23,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41070737] [2023-01-27 19:13:23,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:13:23,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 19:13:23,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:13:23,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 19:13:23,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-01-27 19:13:23,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 338 [2023-01-27 19:13:23,671 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 57 transitions, 144 flow. Second operand has 7 states, 7 states have (on average 158.28571428571428) internal successors, (1108), 7 states have internal predecessors, (1108), 0 states have call successors, (0), 0 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 19:13:23,671 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:13:23,671 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 338 [2023-01-27 19:13:23,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:13:43,504 INFO L130 PetriNetUnfolder]: 286856/375791 cut-off events. [2023-01-27 19:13:43,505 INFO L131 PetriNetUnfolder]: For 15970/15970 co-relation queries the response was YES. [2023-01-27 19:13:44,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 779670 conditions, 375791 events. 286856/375791 cut-off events. For 15970/15970 co-relation queries the response was YES. Maximal size of possible extension queue 7008. Compared 2497829 event pairs, 12100 based on Foata normal form. 1330/377121 useless extension candidates. Maximal degree in co-relation 79638. Up to 246357 conditions per place. [2023-01-27 19:13:45,491 INFO L137 encePairwiseOnDemand]: 334/338 looper letters, 146 selfloop transitions, 6 changer transitions 0/159 dead transitions. [2023-01-27 19:13:45,491 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 159 transitions, 656 flow [2023-01-27 19:13:45,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 19:13:45,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 19:13:45,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1091 transitions. [2023-01-27 19:13:45,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5379684418145957 [2023-01-27 19:13:45,493 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1091 transitions. [2023-01-27 19:13:45,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1091 transitions. [2023-01-27 19:13:45,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:13:45,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1091 transitions. [2023-01-27 19:13:45,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 181.83333333333334) internal successors, (1091), 6 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 19:13:45,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 338.0) internal successors, (2366), 7 states have internal predecessors, (2366), 0 states have call successors, (0), 0 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 19:13:45,497 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 338.0) internal successors, (2366), 7 states have internal predecessors, (2366), 0 states have call successors, (0), 0 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 19:13:45,498 INFO L175 Difference]: Start difference. First operand has 70 places, 57 transitions, 144 flow. Second operand 6 states and 1091 transitions. [2023-01-27 19:13:45,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 159 transitions, 656 flow [2023-01-27 19:13:45,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 159 transitions, 654 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 19:13:45,546 INFO L231 Difference]: Finished difference. Result has 76 places, 60 transitions, 182 flow [2023-01-27 19:13:45,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=338, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=182, PETRI_PLACES=76, PETRI_TRANSITIONS=60} [2023-01-27 19:13:45,546 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 9 predicate places. [2023-01-27 19:13:45,546 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 60 transitions, 182 flow [2023-01-27 19:13:45,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 158.28571428571428) internal successors, (1108), 7 states have internal predecessors, (1108), 0 states have call successors, (0), 0 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 19:13:45,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:13:45,547 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-01-27 19:13:45,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-01-27 19:13:45,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:13:45,752 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:13:45,752 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:13:45,752 INFO L85 PathProgramCache]: Analyzing trace with hash 449457686, now seen corresponding path program 1 times [2023-01-27 19:13:45,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:13:45,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89575494] [2023-01-27 19:13:45,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:13:45,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:13:45,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:13:45,767 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-01-27 19:13:45,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-01-27 19:13:45,793 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-01-27 19:13:45,793 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-01-27 19:13:45,795 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-01-27 19:13:45,796 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-01-27 19:13:45,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-01-27 19:13:45,796 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-01-27 19:13:45,796 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-01-27 19:13:45,796 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-01-27 19:13:45,813 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 19:13:45,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 206 places, 229 transitions, 503 flow [2023-01-27 19:13:45,839 INFO L130 PetriNetUnfolder]: 54/389 cut-off events. [2023-01-27 19:13:45,839 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-01-27 19:13:45,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 420 conditions, 389 events. 54/389 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1207 event pairs, 0 based on Foata normal form. 0/323 useless extension candidates. Maximal degree in co-relation 336. Up to 12 conditions per place. [2023-01-27 19:13:45,841 INFO L82 GeneralOperation]: Start removeDead. Operand has 206 places, 229 transitions, 503 flow [2023-01-27 19:13:45,843 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 206 places, 229 transitions, 503 flow [2023-01-27 19:13:45,843 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:13:45,843 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 206 places, 229 transitions, 503 flow [2023-01-27 19:13:45,843 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 206 places, 229 transitions, 503 flow [2023-01-27 19:13:45,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 206 places, 229 transitions, 503 flow [2023-01-27 19:13:45,869 INFO L130 PetriNetUnfolder]: 54/389 cut-off events. [2023-01-27 19:13:45,869 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-01-27 19:13:45,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 420 conditions, 389 events. 54/389 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1207 event pairs, 0 based on Foata normal form. 0/323 useless extension candidates. Maximal degree in co-relation 336. Up to 12 conditions per place. [2023-01-27 19:13:45,877 INFO L119 LiptonReduction]: Number of co-enabled transitions 32000 [2023-01-27 19:13:48,225 INFO L134 LiptonReduction]: Checked pairs total: 72192 [2023-01-27 19:13:48,225 INFO L136 LiptonReduction]: Total number of compositions: 160 [2023-01-27 19:13:48,227 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:13:48,227 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;@60c29697, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:13:48,227 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-01-27 19:13:48,228 INFO L130 PetriNetUnfolder]: 0/8 cut-off events. [2023-01-27 19:13:48,228 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 19:13:48,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:13:48,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-01-27 19:13:48,228 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 19:13:48,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:13:48,228 INFO L85 PathProgramCache]: Analyzing trace with hash 53988901, now seen corresponding path program 1 times [2023-01-27 19:13:48,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:13:48,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118966171] [2023-01-27 19:13:48,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:13:48,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:13:48,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:13:48,243 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 19:13:48,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:13:48,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118966171] [2023-01-27 19:13:48,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118966171] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:13:48,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:13:48,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 19:13:48,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856199552] [2023-01-27 19:13:48,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:13:48,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:13:48,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:13:48,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:13:48,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:13:48,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 389 [2023-01-27 19:13:48,245 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 102 transitions, 249 flow. Second operand has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:13:48,245 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:13:48,245 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 389 [2023-01-27 19:13:48,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand