/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/triangular-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 17:44:09,170 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 17:44:09,172 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 17:44:09,209 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 17:44:09,209 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 17:44:09,211 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 17:44:09,214 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 17:44:09,218 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 17:44:09,219 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 17:44:09,225 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 17:44:09,226 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 17:44:09,228 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 17:44:09,228 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 17:44:09,230 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 17:44:09,231 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 17:44:09,232 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 17:44:09,233 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 17:44:09,233 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 17:44:09,235 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 17:44:09,241 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 17:44:09,242 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 17:44:09,243 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 17:44:09,243 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 17:44:09,244 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 17:44:09,252 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-27 17:44:09,258 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 17:44:09,259 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 17:44:09,259 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 17:44:09,261 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-01-27 17:44:09,286 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 17:44:09,286 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 17:44:09,287 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 17:44:09,287 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 17:44:09,288 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 17:44:09,288 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 17:44:09,288 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 17:44:09,289 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 17:44:09,289 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 17:44:09,289 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 17:44:09,289 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 17:44:09,290 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 17:44:09,290 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 17:44:09,290 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 17:44:09,290 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 17:44:09,290 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 17:44:09,290 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 17:44:09,290 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 17:44:09,290 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 17:44:09,291 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 17:44:09,291 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 17:44:09,291 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 17:44:09,291 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 17:44:09,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 17:44:09,291 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 17:44:09,291 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 17:44:09,291 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 17:44:09,292 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 17:44:09,292 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 17:44:09,292 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 17:44:09,292 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 17:44:09,292 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 17:44:09,490 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 17:44:09,510 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 17:44:09,512 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 17:44:09,512 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 17:44:09,515 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 17:44:09,516 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-1.i [2023-01-27 17:44:10,639 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 17:44:10,896 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 17:44:10,896 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-1.i [2023-01-27 17:44:10,919 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89f6fedd9/c5baa7188a1849aca67c49a3286ce072/FLAG16bd18ffb [2023-01-27 17:44:10,937 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89f6fedd9/c5baa7188a1849aca67c49a3286ce072 [2023-01-27 17:44:10,941 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 17:44:10,943 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 17:44:10,944 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 17:44:10,944 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 17:44:10,946 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 17:44:10,947 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 05:44:10" (1/1) ... [2023-01-27 17:44:10,948 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ad427aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:44:10, skipping insertion in model container [2023-01-27 17:44:10,948 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 05:44:10" (1/1) ... [2023-01-27 17:44:10,953 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 17:44:10,992 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 17:44:11,248 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-1.i[30950,30963] [2023-01-27 17:44:11,252 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 17:44:11,261 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 17:44:11,315 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-1.i[30950,30963] [2023-01-27 17:44:11,316 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 17:44:11,350 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 17:44:11,350 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 17:44:11,356 INFO L208 MainTranslator]: Completed translation [2023-01-27 17:44:11,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:44:11 WrapperNode [2023-01-27 17:44:11,357 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 17:44:11,358 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 17:44:11,358 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 17:44:11,358 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 17:44:11,364 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:44:11" (1/1) ... [2023-01-27 17:44:11,379 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:44:11" (1/1) ... [2023-01-27 17:44:11,398 INFO L138 Inliner]: procedures = 169, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 47 [2023-01-27 17:44:11,398 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 17:44:11,399 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 17:44:11,399 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 17:44:11,399 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 17:44:11,406 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:44:11" (1/1) ... [2023-01-27 17:44:11,406 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:44:11" (1/1) ... [2023-01-27 17:44:11,419 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:44:11" (1/1) ... [2023-01-27 17:44:11,419 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:44:11" (1/1) ... [2023-01-27 17:44:11,428 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:44:11" (1/1) ... [2023-01-27 17:44:11,431 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:44:11" (1/1) ... [2023-01-27 17:44:11,432 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:44:11" (1/1) ... [2023-01-27 17:44:11,433 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:44:11" (1/1) ... [2023-01-27 17:44:11,435 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 17:44:11,436 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 17:44:11,436 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 17:44:11,436 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 17:44:11,436 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:44:11" (1/1) ... [2023-01-27 17:44:11,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 17:44:11,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 17:44:11,471 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-01-27 17:44:11,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-01-27 17:44:11,507 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-01-27 17:44:11,507 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-01-27 17:44:11,507 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-01-27 17:44:11,508 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-01-27 17:44:11,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 17:44:11,508 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-27 17:44:11,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 17:44:11,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 17:44:11,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 17:44:11,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 17:44:11,508 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-27 17:44:11,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 17:44:11,508 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 17:44:11,509 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-27 17:44:11,689 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 17:44:11,690 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 17:44:11,821 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 17:44:11,826 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 17:44:11,826 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-01-27 17:44:11,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 05:44:11 BoogieIcfgContainer [2023-01-27 17:44:11,828 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 17:44:11,830 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 17:44:11,830 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 17:44:11,833 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 17:44:11,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 05:44:10" (1/3) ... [2023-01-27 17:44:11,834 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f6558e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 05:44:11, skipping insertion in model container [2023-01-27 17:44:11,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:44:11" (2/3) ... [2023-01-27 17:44:11,834 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f6558e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 05:44:11, skipping insertion in model container [2023-01-27 17:44:11,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 05:44:11" (3/3) ... [2023-01-27 17:44:11,835 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-1.i [2023-01-27 17:44:11,850 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 17:44:11,850 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-27 17:44:11,850 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 17:44:11,917 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-01-27 17:44:11,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 66 transitions, 142 flow [2023-01-27 17:44:12,009 INFO L130 PetriNetUnfolder]: 5/64 cut-off events. [2023-01-27 17:44:12,009 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 17:44:12,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 64 events. 5/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2023-01-27 17:44:12,016 INFO L82 GeneralOperation]: Start removeDead. Operand has 68 places, 66 transitions, 142 flow [2023-01-27 17:44:12,020 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 64 transitions, 134 flow [2023-01-27 17:44:12,025 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 17:44:12,039 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 66 places, 64 transitions, 134 flow [2023-01-27 17:44:12,043 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 66 places, 64 transitions, 134 flow [2023-01-27 17:44:12,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 64 transitions, 134 flow [2023-01-27 17:44:12,072 INFO L130 PetriNetUnfolder]: 5/64 cut-off events. [2023-01-27 17:44:12,072 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 17:44:12,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 64 events. 5/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2023-01-27 17:44:12,075 INFO L119 LiptonReduction]: Number of co-enabled transitions 1078 [2023-01-27 17:44:13,926 INFO L134 LiptonReduction]: Checked pairs total: 999 [2023-01-27 17:44:13,926 INFO L136 LiptonReduction]: Total number of compositions: 58 [2023-01-27 17:44:13,938 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 17:44:13,943 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;@6b1f0771, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 17:44:13,943 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-27 17:44:13,947 INFO L130 PetriNetUnfolder]: 3/13 cut-off events. [2023-01-27 17:44:13,947 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 17:44:13,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:44:13,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-01-27 17:44:13,948 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 17:44:13,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:44:13,952 INFO L85 PathProgramCache]: Analyzing trace with hash -776471266, now seen corresponding path program 1 times [2023-01-27 17:44:13,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:44:13,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941401612] [2023-01-27 17:44:13,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:44:13,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:44:14,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:44:14,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:44:14,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:44:14,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941401612] [2023-01-27 17:44:14,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941401612] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:44:14,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:44:14,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 17:44:14,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913505565] [2023-01-27 17:44:14,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:44:14,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 17:44:14,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:44:14,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 17:44:14,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 17:44:14,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 124 [2023-01-27 17:44:14,373 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 14 transitions, 34 flow. Second operand has 4 states, 4 states have (on average 52.5) internal successors, (210), 4 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:44:14,373 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:44:14,373 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 124 [2023-01-27 17:44:14,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:44:14,451 INFO L130 PetriNetUnfolder]: 94/152 cut-off events. [2023-01-27 17:44:14,452 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 17:44:14,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 152 events. 94/152 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 393 event pairs, 11 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 306. Up to 76 conditions per place. [2023-01-27 17:44:14,454 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 18 selfloop transitions, 4 changer transitions 4/26 dead transitions. [2023-01-27 17:44:14,454 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 26 transitions, 110 flow [2023-01-27 17:44:14,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 17:44:14,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 17:44:14,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 233 transitions. [2023-01-27 17:44:14,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46975806451612906 [2023-01-27 17:44:14,466 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 233 transitions. [2023-01-27 17:44:14,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 233 transitions. [2023-01-27 17:44:14,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:44:14,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 233 transitions. [2023-01-27 17:44:14,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 58.25) internal successors, (233), 4 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:44:14,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 124.0) internal successors, (620), 5 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:44:14,477 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 124.0) internal successors, (620), 5 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:44:14,479 INFO L175 Difference]: Start difference. First operand has 18 places, 14 transitions, 34 flow. Second operand 4 states and 233 transitions. [2023-01-27 17:44:14,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 26 transitions, 110 flow [2023-01-27 17:44:14,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 26 transitions, 108 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-27 17:44:14,483 INFO L231 Difference]: Finished difference. Result has 21 places, 15 transitions, 53 flow [2023-01-27 17:44:14,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=53, PETRI_PLACES=21, PETRI_TRANSITIONS=15} [2023-01-27 17:44:14,487 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 3 predicate places. [2023-01-27 17:44:14,487 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 15 transitions, 53 flow [2023-01-27 17:44:14,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.5) internal successors, (210), 4 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:44:14,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:44:14,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:44:14,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 17:44:14,488 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 17:44:14,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:44:14,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1135033148, now seen corresponding path program 1 times [2023-01-27 17:44:14,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:44:14,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009780231] [2023-01-27 17:44:14,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:44:14,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:44:14,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:44:14,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:44:14,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:44:14,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009780231] [2023-01-27 17:44:14,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009780231] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:44:14,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:44:14,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 17:44:14,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249775461] [2023-01-27 17:44:14,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:44:14,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 17:44:14,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:44:14,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 17:44:14,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-27 17:44:14,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 124 [2023-01-27 17:44:14,690 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 15 transitions, 53 flow. Second operand has 5 states, 5 states have (on average 52.6) internal successors, (263), 5 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:44:14,690 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:44:14,690 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 124 [2023-01-27 17:44:14,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:44:14,791 INFO L130 PetriNetUnfolder]: 126/217 cut-off events. [2023-01-27 17:44:14,791 INFO L131 PetriNetUnfolder]: For 73/73 co-relation queries the response was YES. [2023-01-27 17:44:14,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 547 conditions, 217 events. 126/217 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 654 event pairs, 19 based on Foata normal form. 10/191 useless extension candidates. Maximal degree in co-relation 535. Up to 89 conditions per place. [2023-01-27 17:44:14,796 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 33 selfloop transitions, 9 changer transitions 0/42 dead transitions. [2023-01-27 17:44:14,796 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 42 transitions, 215 flow [2023-01-27 17:44:14,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 17:44:14,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 17:44:14,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 344 transitions. [2023-01-27 17:44:14,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46236559139784944 [2023-01-27 17:44:14,801 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 344 transitions. [2023-01-27 17:44:14,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 344 transitions. [2023-01-27 17:44:14,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:44:14,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 344 transitions. [2023-01-27 17:44:14,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 57.333333333333336) internal successors, (344), 6 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:44:14,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:44:14,807 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:44:14,807 INFO L175 Difference]: Start difference. First operand has 21 places, 15 transitions, 53 flow. Second operand 6 states and 344 transitions. [2023-01-27 17:44:14,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 42 transitions, 215 flow [2023-01-27 17:44:14,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 42 transitions, 215 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 17:44:14,810 INFO L231 Difference]: Finished difference. Result has 29 places, 24 transitions, 134 flow [2023-01-27 17:44:14,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=134, PETRI_PLACES=29, PETRI_TRANSITIONS=24} [2023-01-27 17:44:14,811 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 11 predicate places. [2023-01-27 17:44:14,811 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 24 transitions, 134 flow [2023-01-27 17:44:14,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 52.6) internal successors, (263), 5 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:44:14,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:44:14,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:44:14,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 17:44:14,812 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 17:44:14,814 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:44:14,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1135047098, now seen corresponding path program 2 times [2023-01-27 17:44:14,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:44:14,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203099083] [2023-01-27 17:44:14,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:44:14,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:44:14,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:44:14,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:44:14,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:44:14,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203099083] [2023-01-27 17:44:14,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203099083] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:44:14,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:44:14,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 17:44:14,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972279905] [2023-01-27 17:44:14,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:44:14,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 17:44:14,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:44:14,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 17:44:14,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-27 17:44:14,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 124 [2023-01-27 17:44:14,952 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 52.6) internal successors, (263), 5 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:44:14,952 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:44:14,952 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 124 [2023-01-27 17:44:14,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:44:15,055 INFO L130 PetriNetUnfolder]: 126/219 cut-off events. [2023-01-27 17:44:15,056 INFO L131 PetriNetUnfolder]: For 298/298 co-relation queries the response was YES. [2023-01-27 17:44:15,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 722 conditions, 219 events. 126/219 cut-off events. For 298/298 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 683 event pairs, 31 based on Foata normal form. 10/229 useless extension candidates. Maximal degree in co-relation 704. Up to 87 conditions per place. [2023-01-27 17:44:15,058 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 29 selfloop transitions, 15 changer transitions 8/52 dead transitions. [2023-01-27 17:44:15,058 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 52 transitions, 348 flow [2023-01-27 17:44:15,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 17:44:15,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 17:44:15,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 399 transitions. [2023-01-27 17:44:15,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4596774193548387 [2023-01-27 17:44:15,060 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 399 transitions. [2023-01-27 17:44:15,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 399 transitions. [2023-01-27 17:44:15,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:44:15,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 399 transitions. [2023-01-27 17:44:15,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 57.0) internal successors, (399), 7 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:44:15,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 124.0) internal successors, (992), 8 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:44:15,063 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 124.0) internal successors, (992), 8 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:44:15,063 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 134 flow. Second operand 7 states and 399 transitions. [2023-01-27 17:44:15,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 52 transitions, 348 flow [2023-01-27 17:44:15,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 52 transitions, 344 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-01-27 17:44:15,067 INFO L231 Difference]: Finished difference. Result has 39 places, 32 transitions, 240 flow [2023-01-27 17:44:15,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=240, PETRI_PLACES=39, PETRI_TRANSITIONS=32} [2023-01-27 17:44:15,068 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 21 predicate places. [2023-01-27 17:44:15,068 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 32 transitions, 240 flow [2023-01-27 17:44:15,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 52.6) internal successors, (263), 5 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:44:15,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:44:15,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:44:15,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-27 17:44:15,070 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 17:44:15,070 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:44:15,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1601722647, now seen corresponding path program 1 times [2023-01-27 17:44:15,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:44:15,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485410787] [2023-01-27 17:44:15,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:44:15,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:44:15,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:44:15,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:44:15,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:44:15,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485410787] [2023-01-27 17:44:15,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485410787] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:44:15,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:44:15,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-27 17:44:15,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479641633] [2023-01-27 17:44:15,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:44:15,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-27 17:44:15,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:44:15,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-27 17:44:15,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-01-27 17:44:15,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 124 [2023-01-27 17:44:15,206 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 240 flow. Second operand has 6 states, 6 states have (on average 52.666666666666664) internal successors, (316), 6 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 17:44:15,206 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:44:15,206 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 124 [2023-01-27 17:44:15,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:44:15,313 INFO L130 PetriNetUnfolder]: 162/283 cut-off events. [2023-01-27 17:44:15,313 INFO L131 PetriNetUnfolder]: For 777/777 co-relation queries the response was YES. [2023-01-27 17:44:15,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1082 conditions, 283 events. 162/283 cut-off events. For 777/777 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 940 event pairs, 20 based on Foata normal form. 8/291 useless extension candidates. Maximal degree in co-relation 1058. Up to 71 conditions per place. [2023-01-27 17:44:15,315 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 37 selfloop transitions, 21 changer transitions 3/61 dead transitions. [2023-01-27 17:44:15,316 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 61 transitions, 488 flow [2023-01-27 17:44:15,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-27 17:44:15,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-27 17:44:15,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 454 transitions. [2023-01-27 17:44:15,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576612903225806 [2023-01-27 17:44:15,318 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 454 transitions. [2023-01-27 17:44:15,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 454 transitions. [2023-01-27 17:44:15,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:44:15,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 454 transitions. [2023-01-27 17:44:15,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 56.75) internal successors, (454), 8 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:44:15,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 124.0) internal successors, (1116), 9 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:44:15,327 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 124.0) internal successors, (1116), 9 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:44:15,328 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 240 flow. Second operand 8 states and 454 transitions. [2023-01-27 17:44:15,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 61 transitions, 488 flow [2023-01-27 17:44:15,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 61 transitions, 467 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-01-27 17:44:15,335 INFO L231 Difference]: Finished difference. Result has 49 places, 38 transitions, 346 flow [2023-01-27 17:44:15,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=346, PETRI_PLACES=49, PETRI_TRANSITIONS=38} [2023-01-27 17:44:15,337 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 31 predicate places. [2023-01-27 17:44:15,337 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 38 transitions, 346 flow [2023-01-27 17:44:15,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 52.666666666666664) internal successors, (316), 6 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 17:44:15,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:44:15,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:44:15,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-27 17:44:15,338 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 17:44:15,338 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:44:15,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1572215607, now seen corresponding path program 2 times [2023-01-27 17:44:15,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:44:15,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480811555] [2023-01-27 17:44:15,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:44:15,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:44:15,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:44:15,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:44:15,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:44:15,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480811555] [2023-01-27 17:44:15,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480811555] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:44:15,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:44:15,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-27 17:44:15,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881928218] [2023-01-27 17:44:15,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:44:15,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-27 17:44:15,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:44:15,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-27 17:44:15,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-01-27 17:44:15,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 124 [2023-01-27 17:44:15,459 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 38 transitions, 346 flow. Second operand has 6 states, 6 states have (on average 52.666666666666664) internal successors, (316), 6 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 17:44:15,459 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:44:15,459 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 124 [2023-01-27 17:44:15,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:44:15,562 INFO L130 PetriNetUnfolder]: 154/271 cut-off events. [2023-01-27 17:44:15,562 INFO L131 PetriNetUnfolder]: For 1323/1323 co-relation queries the response was YES. [2023-01-27 17:44:15,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1208 conditions, 271 events. 154/271 cut-off events. For 1323/1323 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 926 event pairs, 22 based on Foata normal form. 8/279 useless extension candidates. Maximal degree in co-relation 1179. Up to 67 conditions per place. [2023-01-27 17:44:15,565 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 30 selfloop transitions, 21 changer transitions 8/59 dead transitions. [2023-01-27 17:44:15,565 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 59 transitions, 576 flow [2023-01-27 17:44:15,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 17:44:15,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 17:44:15,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 397 transitions. [2023-01-27 17:44:15,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573732718894009 [2023-01-27 17:44:15,567 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 397 transitions. [2023-01-27 17:44:15,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 397 transitions. [2023-01-27 17:44:15,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:44:15,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 397 transitions. [2023-01-27 17:44:15,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 56.714285714285715) internal successors, (397), 7 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:44:15,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 124.0) internal successors, (992), 8 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:44:15,570 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 124.0) internal successors, (992), 8 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:44:15,570 INFO L175 Difference]: Start difference. First operand has 49 places, 38 transitions, 346 flow. Second operand 7 states and 397 transitions. [2023-01-27 17:44:15,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 59 transitions, 576 flow [2023-01-27 17:44:15,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 59 transitions, 537 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-01-27 17:44:15,576 INFO L231 Difference]: Finished difference. Result has 53 places, 40 transitions, 398 flow [2023-01-27 17:44:15,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=398, PETRI_PLACES=53, PETRI_TRANSITIONS=40} [2023-01-27 17:44:15,578 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 35 predicate places. [2023-01-27 17:44:15,578 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 40 transitions, 398 flow [2023-01-27 17:44:15,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 52.666666666666664) internal successors, (316), 6 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 17:44:15,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:44:15,578 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:44:15,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-27 17:44:15,579 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 17:44:15,579 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:44:15,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1494024432, now seen corresponding path program 3 times [2023-01-27 17:44:15,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:44:15,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614980484] [2023-01-27 17:44:15,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:44:15,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:44:15,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:44:15,682 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 17:44:15,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:44:15,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614980484] [2023-01-27 17:44:15,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614980484] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 17:44:15,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220006776] [2023-01-27 17:44:15,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 17:44:15,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 17:44:15,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 17:44:15,701 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 17:44:15,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-27 17:44:15,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 17:44:15,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 17:44:15,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2023-01-27 17:44:15,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 17:44:15,869 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 17:44:15,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 17:44:16,026 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 17:44:16,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220006776] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 17:44:16,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 17:44:16,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-01-27 17:44:16,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582815464] [2023-01-27 17:44:16,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 17:44:16,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-27 17:44:16,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:44:16,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-27 17:44:16,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-01-27 17:44:16,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 124 [2023-01-27 17:44:16,029 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 40 transitions, 398 flow. Second operand has 12 states, 12 states have (on average 52.916666666666664) internal successors, (635), 12 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:44:16,029 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:44:16,029 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 124 [2023-01-27 17:44:16,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:44:16,281 INFO L130 PetriNetUnfolder]: 202/351 cut-off events. [2023-01-27 17:44:16,281 INFO L131 PetriNetUnfolder]: For 2205/2205 co-relation queries the response was YES. [2023-01-27 17:44:16,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1677 conditions, 351 events. 202/351 cut-off events. For 2205/2205 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1197 event pairs, 18 based on Foata normal form. 16/367 useless extension candidates. Maximal degree in co-relation 1647. Up to 87 conditions per place. [2023-01-27 17:44:16,284 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 34 selfloop transitions, 36 changer transitions 22/92 dead transitions. [2023-01-27 17:44:16,284 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 92 transitions, 958 flow [2023-01-27 17:44:16,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-27 17:44:16,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-27 17:44:16,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 788 transitions. [2023-01-27 17:44:16,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4539170506912442 [2023-01-27 17:44:16,287 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 788 transitions. [2023-01-27 17:44:16,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 788 transitions. [2023-01-27 17:44:16,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:44:16,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 788 transitions. [2023-01-27 17:44:16,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.285714285714285) internal successors, (788), 14 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:44:16,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 124.0) internal successors, (1860), 15 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:44:16,292 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 124.0) internal successors, (1860), 15 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:44:16,292 INFO L175 Difference]: Start difference. First operand has 53 places, 40 transitions, 398 flow. Second operand 14 states and 788 transitions. [2023-01-27 17:44:16,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 92 transitions, 958 flow [2023-01-27 17:44:16,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 92 transitions, 893 flow, removed 15 selfloop flow, removed 6 redundant places. [2023-01-27 17:44:16,299 INFO L231 Difference]: Finished difference. Result has 65 places, 56 transitions, 701 flow [2023-01-27 17:44:16,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=701, PETRI_PLACES=65, PETRI_TRANSITIONS=56} [2023-01-27 17:44:16,301 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 47 predicate places. [2023-01-27 17:44:16,301 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 56 transitions, 701 flow [2023-01-27 17:44:16,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 52.916666666666664) internal successors, (635), 12 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:44:16,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:44:16,302 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:44:16,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-27 17:44:16,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-01-27 17:44:16,507 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 17:44:16,508 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:44:16,508 INFO L85 PathProgramCache]: Analyzing trace with hash 976616748, now seen corresponding path program 4 times [2023-01-27 17:44:16,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:44:16,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826968349] [2023-01-27 17:44:16,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:44:16,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:44:16,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:44:16,634 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 17:44:16,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:44:16,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826968349] [2023-01-27 17:44:16,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826968349] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 17:44:16,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627526047] [2023-01-27 17:44:16,635 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 17:44:16,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 17:44:16,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 17:44:16,636 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 17:44:16,657 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 17:44:16,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 17:44:16,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 17:44:16,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjunts are in the unsatisfiable core [2023-01-27 17:44:16,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 17:44:16,788 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 17:44:16,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 17:44:16,951 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 17:44:16,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627526047] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 17:44:16,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 17:44:16,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-01-27 17:44:16,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772006348] [2023-01-27 17:44:16,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 17:44:16,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-27 17:44:16,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:44:16,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-27 17:44:16,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-01-27 17:44:16,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 124 [2023-01-27 17:44:16,955 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 56 transitions, 701 flow. Second operand has 16 states, 16 states have (on average 52.8125) internal successors, (845), 16 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:44:16,955 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:44:16,955 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 124 [2023-01-27 17:44:16,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:44:17,216 INFO L130 PetriNetUnfolder]: 258/463 cut-off events. [2023-01-27 17:44:17,216 INFO L131 PetriNetUnfolder]: For 4313/4313 co-relation queries the response was YES. [2023-01-27 17:44:17,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2445 conditions, 463 events. 258/463 cut-off events. For 4313/4313 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1664 event pairs, 55 based on Foata normal form. 32/495 useless extension candidates. Maximal degree in co-relation 2411. Up to 237 conditions per place. [2023-01-27 17:44:17,220 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 64 selfloop transitions, 27 changer transitions 27/118 dead transitions. [2023-01-27 17:44:17,220 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 118 transitions, 1469 flow [2023-01-27 17:44:17,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-27 17:44:17,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-27 17:44:17,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 899 transitions. [2023-01-27 17:44:17,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453125 [2023-01-27 17:44:17,222 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 899 transitions. [2023-01-27 17:44:17,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 899 transitions. [2023-01-27 17:44:17,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:44:17,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 899 transitions. [2023-01-27 17:44:17,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 56.1875) internal successors, (899), 16 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:44:17,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 124.0) internal successors, (2108), 17 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:44:17,228 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 124.0) internal successors, (2108), 17 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:44:17,228 INFO L175 Difference]: Start difference. First operand has 65 places, 56 transitions, 701 flow. Second operand 16 states and 899 transitions. [2023-01-27 17:44:17,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 118 transitions, 1469 flow [2023-01-27 17:44:17,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 118 transitions, 1110 flow, removed 167 selfloop flow, removed 5 redundant places. [2023-01-27 17:44:17,241 INFO L231 Difference]: Finished difference. Result has 85 places, 70 transitions, 781 flow [2023-01-27 17:44:17,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=781, PETRI_PLACES=85, PETRI_TRANSITIONS=70} [2023-01-27 17:44:17,242 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 67 predicate places. [2023-01-27 17:44:17,242 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 70 transitions, 781 flow [2023-01-27 17:44:17,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 52.8125) internal successors, (845), 16 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:44:17,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:44:17,243 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:44:17,251 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 17:44:17,448 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 17:44:17,449 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 17:44:17,449 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:44:17,449 INFO L85 PathProgramCache]: Analyzing trace with hash 921314670, now seen corresponding path program 5 times [2023-01-27 17:44:17,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:44:17,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310683230] [2023-01-27 17:44:17,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:44:17,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:44:17,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:44:17,604 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 17:44:17,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:44:17,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310683230] [2023-01-27 17:44:17,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310683230] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 17:44:17,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048877768] [2023-01-27 17:44:17,605 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 17:44:17,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 17:44:17,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 17:44:17,608 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 17:44:17,613 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 17:44:17,675 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-27 17:44:17,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 17:44:17,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjunts are in the unsatisfiable core [2023-01-27 17:44:17,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 17:44:17,726 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 17:44:17,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 17:44:17,852 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 17:44:17,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048877768] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 17:44:17,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 17:44:17,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-01-27 17:44:17,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834758191] [2023-01-27 17:44:17,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 17:44:17,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-27 17:44:17,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:44:17,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-27 17:44:17,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2023-01-27 17:44:17,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 124 [2023-01-27 17:44:17,856 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 70 transitions, 781 flow. Second operand has 17 states, 17 states have (on average 52.8235294117647) internal successors, (898), 17 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:44:17,856 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:44:17,856 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 124 [2023-01-27 17:44:17,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:44:18,362 INFO L130 PetriNetUnfolder]: 412/755 cut-off events. [2023-01-27 17:44:18,362 INFO L131 PetriNetUnfolder]: For 12149/12149 co-relation queries the response was YES. [2023-01-27 17:44:18,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4019 conditions, 755 events. 412/755 cut-off events. For 12149/12149 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3349 event pairs, 42 based on Foata normal form. 32/787 useless extension candidates. Maximal degree in co-relation 3976. Up to 227 conditions per place. [2023-01-27 17:44:18,369 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 73 selfloop transitions, 72 changer transitions 37/182 dead transitions. [2023-01-27 17:44:18,369 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 182 transitions, 2101 flow [2023-01-27 17:44:18,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-27 17:44:18,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-27 17:44:18,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1236 transitions. [2023-01-27 17:44:18,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4530791788856305 [2023-01-27 17:44:18,373 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1236 transitions. [2023-01-27 17:44:18,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1236 transitions. [2023-01-27 17:44:18,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:44:18,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1236 transitions. [2023-01-27 17:44:18,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 56.18181818181818) internal successors, (1236), 22 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:44:18,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 124.0) internal successors, (2852), 23 states have internal predecessors, (2852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:44:18,381 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 124.0) internal successors, (2852), 23 states have internal predecessors, (2852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:44:18,381 INFO L175 Difference]: Start difference. First operand has 85 places, 70 transitions, 781 flow. Second operand 22 states and 1236 transitions. [2023-01-27 17:44:18,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 182 transitions, 2101 flow [2023-01-27 17:44:18,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 182 transitions, 1980 flow, removed 51 selfloop flow, removed 4 redundant places. [2023-01-27 17:44:18,441 INFO L231 Difference]: Finished difference. Result has 116 places, 108 transitions, 1490 flow [2023-01-27 17:44:18,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=678, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1490, PETRI_PLACES=116, PETRI_TRANSITIONS=108} [2023-01-27 17:44:18,442 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 98 predicate places. [2023-01-27 17:44:18,444 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 108 transitions, 1490 flow [2023-01-27 17:44:18,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 52.8235294117647) internal successors, (898), 17 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:44:18,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:44:18,445 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:44:18,455 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 17:44:18,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 17:44:18,650 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 17:44:18,651 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:44:18,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1348503086, now seen corresponding path program 6 times [2023-01-27 17:44:18,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:44:18,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599970922] [2023-01-27 17:44:18,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:44:18,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:44:18,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:44:18,786 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 17:44:18,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:44:18,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599970922] [2023-01-27 17:44:18,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599970922] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 17:44:18,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139146832] [2023-01-27 17:44:18,787 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 17:44:18,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 17:44:18,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 17:44:18,789 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 17:44:18,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-27 17:44:18,864 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-27 17:44:18,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 17:44:18,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjunts are in the unsatisfiable core [2023-01-27 17:44:18,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 17:44:18,897 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 17:44:18,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 17:44:18,996 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 17:44:18,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139146832] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 17:44:18,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 17:44:18,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-01-27 17:44:18,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028756549] [2023-01-27 17:44:18,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 17:44:18,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-27 17:44:18,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:44:18,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-27 17:44:18,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2023-01-27 17:44:18,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 124 [2023-01-27 17:44:19,000 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 108 transitions, 1490 flow. Second operand has 16 states, 16 states have (on average 52.75) internal successors, (844), 16 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:44:19,000 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:44:19,000 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 124 [2023-01-27 17:44:19,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:44:19,554 INFO L130 PetriNetUnfolder]: 612/1111 cut-off events. [2023-01-27 17:44:19,555 INFO L131 PetriNetUnfolder]: For 36655/36655 co-relation queries the response was YES. [2023-01-27 17:44:19,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7830 conditions, 1111 events. 612/1111 cut-off events. For 36655/36655 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5394 event pairs, 28 based on Foata normal form. 36/1147 useless extension candidates. Maximal degree in co-relation 7772. Up to 355 conditions per place. [2023-01-27 17:44:19,568 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 71 selfloop transitions, 134 changer transitions 41/246 dead transitions. [2023-01-27 17:44:19,568 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 246 transitions, 3764 flow [2023-01-27 17:44:19,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-01-27 17:44:19,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-01-27 17:44:19,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1517 transitions. [2023-01-27 17:44:19,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4531063321385902 [2023-01-27 17:44:19,572 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1517 transitions. [2023-01-27 17:44:19,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1517 transitions. [2023-01-27 17:44:19,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:44:19,573 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1517 transitions. [2023-01-27 17:44:19,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 56.18518518518518) internal successors, (1517), 27 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:44:19,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 124.0) internal successors, (3472), 28 states have internal predecessors, (3472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:44:19,581 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 124.0) internal successors, (3472), 28 states have internal predecessors, (3472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:44:19,581 INFO L175 Difference]: Start difference. First operand has 116 places, 108 transitions, 1490 flow. Second operand 27 states and 1517 transitions. [2023-01-27 17:44:19,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 246 transitions, 3764 flow [2023-01-27 17:44:19,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 246 transitions, 3448 flow, removed 148 selfloop flow, removed 4 redundant places. [2023-01-27 17:44:19,655 INFO L231 Difference]: Finished difference. Result has 153 places, 158 transitions, 2642 flow [2023-01-27 17:44:19,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=1256, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2642, PETRI_PLACES=153, PETRI_TRANSITIONS=158} [2023-01-27 17:44:19,656 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 135 predicate places. [2023-01-27 17:44:19,656 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 158 transitions, 2642 flow [2023-01-27 17:44:19,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 52.75) internal successors, (844), 16 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:44:19,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:44:19,657 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:44:19,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-01-27 17:44:19,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 17:44:19,863 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 17:44:19,863 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:44:19,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1579002867, now seen corresponding path program 7 times [2023-01-27 17:44:19,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:44:19,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060833309] [2023-01-27 17:44:19,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:44:19,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:44:19,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:44:19,978 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 17:44:19,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:44:19,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060833309] [2023-01-27 17:44:19,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060833309] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 17:44:19,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298988607] [2023-01-27 17:44:19,979 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 17:44:19,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 17:44:19,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 17:44:19,980 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 17:44:19,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-27 17:44:20,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:44:20,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-27 17:44:20,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 17:44:20,087 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 17:44:20,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 17:44:20,165 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 17:44:20,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298988607] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 17:44:20,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 17:44:20,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2023-01-27 17:44:20,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261916538] [2023-01-27 17:44:20,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 17:44:20,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-27 17:44:20,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:44:20,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-27 17:44:20,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2023-01-27 17:44:20,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 124 [2023-01-27 17:44:20,168 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 158 transitions, 2642 flow. Second operand has 16 states, 16 states have (on average 52.875) internal successors, (846), 16 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:44:20,168 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:44:20,168 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 124 [2023-01-27 17:44:20,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:44:20,788 INFO L130 PetriNetUnfolder]: 716/1303 cut-off events. [2023-01-27 17:44:20,788 INFO L131 PetriNetUnfolder]: For 72224/72224 co-relation queries the response was YES. [2023-01-27 17:44:20,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11671 conditions, 1303 events. 716/1303 cut-off events. For 72224/72224 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 6500 event pairs, 21 based on Foata normal form. 28/1331 useless extension candidates. Maximal degree in co-relation 11599. Up to 426 conditions per place. [2023-01-27 17:44:20,804 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 63 selfloop transitions, 160 changer transitions 44/267 dead transitions. [2023-01-27 17:44:20,804 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 267 transitions, 5377 flow [2023-01-27 17:44:20,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-01-27 17:44:20,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-01-27 17:44:20,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1404 transitions. [2023-01-27 17:44:20,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529032258064516 [2023-01-27 17:44:20,807 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1404 transitions. [2023-01-27 17:44:20,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1404 transitions. [2023-01-27 17:44:20,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:44:20,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1404 transitions. [2023-01-27 17:44:20,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 56.16) internal successors, (1404), 25 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:44:20,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 124.0) internal successors, (3224), 26 states have internal predecessors, (3224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:44:20,814 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 124.0) internal successors, (3224), 26 states have internal predecessors, (3224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:44:20,814 INFO L175 Difference]: Start difference. First operand has 153 places, 158 transitions, 2642 flow. Second operand 25 states and 1404 transitions. [2023-01-27 17:44:20,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 267 transitions, 5377 flow [2023-01-27 17:44:21,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 267 transitions, 4062 flow, removed 628 selfloop flow, removed 11 redundant places. [2023-01-27 17:44:21,015 INFO L231 Difference]: Finished difference. Result has 176 places, 192 transitions, 3185 flow [2023-01-27 17:44:21,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=2013, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=3185, PETRI_PLACES=176, PETRI_TRANSITIONS=192} [2023-01-27 17:44:21,017 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 158 predicate places. [2023-01-27 17:44:21,017 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 192 transitions, 3185 flow [2023-01-27 17:44:21,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 52.875) internal successors, (846), 16 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:44:21,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:44:21,018 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:44:21,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-27 17:44:21,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-01-27 17:44:21,228 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 17:44:21,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:44:21,228 INFO L85 PathProgramCache]: Analyzing trace with hash -2078744859, now seen corresponding path program 8 times [2023-01-27 17:44:21,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:44:21,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376059034] [2023-01-27 17:44:21,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:44:21,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:44:21,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:44:21,431 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:44:21,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:44:21,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376059034] [2023-01-27 17:44:21,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376059034] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 17:44:21,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617952683] [2023-01-27 17:44:21,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 17:44:21,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 17:44:21,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 17:44:21,433 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 17:44:21,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-01-27 17:44:21,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 17:44:21,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 17:44:21,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 16 conjunts are in the unsatisfiable core [2023-01-27 17:44:21,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 17:44:21,563 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:44:21,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 17:44:21,722 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:44:21,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617952683] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 17:44:21,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 17:44:21,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-01-27 17:44:21,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135037406] [2023-01-27 17:44:21,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 17:44:21,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-01-27 17:44:21,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:44:21,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-01-27 17:44:21,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2023-01-27 17:44:21,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 124 [2023-01-27 17:44:21,730 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 192 transitions, 3185 flow. Second operand has 26 states, 26 states have (on average 52.42307692307692) internal successors, (1363), 26 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:44:21,730 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:44:21,730 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 124 [2023-01-27 17:44:21,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:44:22,454 INFO L130 PetriNetUnfolder]: 756/1371 cut-off events. [2023-01-27 17:44:22,455 INFO L131 PetriNetUnfolder]: For 67219/67219 co-relation queries the response was YES. [2023-01-27 17:44:22,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11832 conditions, 1371 events. 756/1371 cut-off events. For 67219/67219 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 6842 event pairs, 28 based on Foata normal form. 12/1383 useless extension candidates. Maximal degree in co-relation 11752. Up to 446 conditions per place. [2023-01-27 17:44:22,473 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 70 selfloop transitions, 172 changer transitions 50/292 dead transitions. [2023-01-27 17:44:22,473 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 292 transitions, 5349 flow [2023-01-27 17:44:22,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-01-27 17:44:22,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-01-27 17:44:22,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1568 transitions. [2023-01-27 17:44:22,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45161290322580644 [2023-01-27 17:44:22,478 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1568 transitions. [2023-01-27 17:44:22,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1568 transitions. [2023-01-27 17:44:22,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:44:22,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1568 transitions. [2023-01-27 17:44:22,484 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 56.0) internal successors, (1568), 28 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:44:22,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 124.0) internal successors, (3596), 29 states have internal predecessors, (3596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:44:22,491 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 124.0) internal successors, (3596), 29 states have internal predecessors, (3596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:44:22,491 INFO L175 Difference]: Start difference. First operand has 176 places, 192 transitions, 3185 flow. Second operand 28 states and 1568 transitions. [2023-01-27 17:44:22,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 292 transitions, 5349 flow [2023-01-27 17:44:22,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 292 transitions, 4886 flow, removed 203 selfloop flow, removed 8 redundant places. [2023-01-27 17:44:22,678 INFO L231 Difference]: Finished difference. Result has 201 places, 202 transitions, 3565 flow [2023-01-27 17:44:22,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=2794, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=3565, PETRI_PLACES=201, PETRI_TRANSITIONS=202} [2023-01-27 17:44:22,679 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 183 predicate places. [2023-01-27 17:44:22,679 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 202 transitions, 3565 flow [2023-01-27 17:44:22,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 52.42307692307692) internal successors, (1363), 26 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:44:22,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:44:22,680 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:44:22,685 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-01-27 17:44:22,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 17:44:22,881 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 17:44:22,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:44:22,881 INFO L85 PathProgramCache]: Analyzing trace with hash -2108826170, now seen corresponding path program 9 times [2023-01-27 17:44:22,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:44:22,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58925910] [2023-01-27 17:44:22,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:44:22,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:44:22,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:44:22,961 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:44:22,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:44:22,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58925910] [2023-01-27 17:44:22,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58925910] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 17:44:22,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815066712] [2023-01-27 17:44:22,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 17:44:22,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 17:44:22,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 17:44:22,962 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 17:44:22,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-01-27 17:44:23,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-01-27 17:44:23,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 17:44:23,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 7 conjunts are in the unsatisfiable core [2023-01-27 17:44:23,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 17:44:23,056 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:44:23,057 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 17:44:23,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815066712] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:44:23,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 17:44:23,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2023-01-27 17:44:23,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159166200] [2023-01-27 17:44:23,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:44:23,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-27 17:44:23,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:44:23,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-27 17:44:23,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2023-01-27 17:44:23,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 124 [2023-01-27 17:44:23,060 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 202 transitions, 3565 flow. Second operand has 8 states, 8 states have (on average 57.375) internal successors, (459), 8 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:44:23,060 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:44:23,060 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 124 [2023-01-27 17:44:23,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:44:23,614 INFO L130 PetriNetUnfolder]: 1723/2880 cut-off events. [2023-01-27 17:44:23,614 INFO L131 PetriNetUnfolder]: For 149104/149104 co-relation queries the response was YES. [2023-01-27 17:44:23,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21950 conditions, 2880 events. 1723/2880 cut-off events. For 149104/149104 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 16476 event pairs, 57 based on Foata normal form. 265/3145 useless extension candidates. Maximal degree in co-relation 21872. Up to 1755 conditions per place. [2023-01-27 17:44:23,648 INFO L137 encePairwiseOnDemand]: 121/124 looper letters, 0 selfloop transitions, 0 changer transitions 566/566 dead transitions. [2023-01-27 17:44:23,648 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 566 transitions, 10082 flow [2023-01-27 17:44:23,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-27 17:44:23,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-27 17:44:23,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 497 transitions. [2023-01-27 17:44:23,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.501008064516129 [2023-01-27 17:44:23,650 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 497 transitions. [2023-01-27 17:44:23,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 497 transitions. [2023-01-27 17:44:23,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:44:23,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 497 transitions. [2023-01-27 17:44:23,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 62.125) internal successors, (497), 8 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:44:23,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 124.0) internal successors, (1116), 9 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:44:23,653 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 124.0) internal successors, (1116), 9 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:44:23,653 INFO L175 Difference]: Start difference. First operand has 201 places, 202 transitions, 3565 flow. Second operand 8 states and 497 transitions. [2023-01-27 17:44:23,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 566 transitions, 10082 flow [2023-01-27 17:44:23,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 566 transitions, 8941 flow, removed 91 selfloop flow, removed 27 redundant places. [2023-01-27 17:44:23,838 INFO L231 Difference]: Finished difference. Result has 179 places, 0 transitions, 0 flow [2023-01-27 17:44:23,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=2684, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=179, PETRI_TRANSITIONS=0} [2023-01-27 17:44:23,838 INFO L281 CegarLoopForPetriNet]: 18 programPoint places, 161 predicate places. [2023-01-27 17:44:23,838 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 0 transitions, 0 flow [2023-01-27 17:44:23,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 57.375) internal successors, (459), 8 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:44:23,841 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-01-27 17:44:23,841 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-01-27 17:44:23,841 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-01-27 17:44:23,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-01-27 17:44:24,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 17:44:24,049 INFO L445 BasicCegarLoop]: Path program histogram: [9, 2, 1] [2023-01-27 17:44:24,052 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-27 17:44:24,052 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-27 17:44:24,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.01 05:44:24 BasicIcfg [2023-01-27 17:44:24,054 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-27 17:44:24,055 INFO L158 Benchmark]: Toolchain (without parser) took 13111.93ms. Allocated memory was 522.2MB in the beginning and 627.0MB in the end (delta: 104.9MB). Free memory was 472.4MB in the beginning and 367.7MB in the end (delta: 104.7MB). Peak memory consumption was 360.5MB. Max. memory is 16.0GB. [2023-01-27 17:44:24,055 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 362.8MB. Free memory is still 310.3MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-27 17:44:24,055 INFO L158 Benchmark]: CACSL2BoogieTranslator took 413.63ms. Allocated memory is still 522.2MB. Free memory was 472.4MB in the beginning and 453.1MB in the end (delta: 19.3MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-01-27 17:44:24,055 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.16ms. Allocated memory is still 522.2MB. Free memory was 453.1MB in the beginning and 451.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-27 17:44:24,055 INFO L158 Benchmark]: Boogie Preprocessor took 36.05ms. Allocated memory is still 522.2MB. Free memory was 451.4MB in the beginning and 449.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-27 17:44:24,056 INFO L158 Benchmark]: RCFGBuilder took 392.79ms. Allocated memory is still 522.2MB. Free memory was 449.8MB in the beginning and 436.7MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-01-27 17:44:24,056 INFO L158 Benchmark]: TraceAbstraction took 12224.15ms. Allocated memory was 522.2MB in the beginning and 627.0MB in the end (delta: 104.9MB). Free memory was 436.2MB in the beginning and 367.7MB in the end (delta: 68.6MB). Peak memory consumption was 324.8MB. Max. memory is 16.0GB. [2023-01-27 17:44:24,057 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 362.8MB. Free memory is still 310.3MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 413.63ms. Allocated memory is still 522.2MB. Free memory was 472.4MB in the beginning and 453.1MB in the end (delta: 19.3MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 40.16ms. Allocated memory is still 522.2MB. Free memory was 453.1MB in the beginning and 451.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 36.05ms. Allocated memory is still 522.2MB. Free memory was 451.4MB in the beginning and 449.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 392.79ms. Allocated memory is still 522.2MB. Free memory was 449.8MB in the beginning and 436.7MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 12224.15ms. Allocated memory was 522.2MB in the beginning and 627.0MB in the end (delta: 104.9MB). Free memory was 436.2MB in the beginning and 367.7MB in the end (delta: 68.6MB). Peak memory consumption was 324.8MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.9s, 66 PlacesBefore, 18 PlacesAfterwards, 64 TransitionsBefore, 14 TransitionsAfterwards, 1078 CoEnabledTransitionPairs, 5 FixpointIterations, 18 TrivialSequentialCompositions, 30 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 8 ConcurrentYvCompositions, 2 ChoiceCompositions, 58 TotalNumberOfCompositions, 999 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 856, independent: 829, independent conditional: 0, independent unconditional: 829, dependent: 27, dependent conditional: 0, dependent unconditional: 27, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 590, independent: 578, independent conditional: 0, independent unconditional: 578, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 856, independent: 251, independent conditional: 0, independent unconditional: 251, dependent: 15, dependent conditional: 0, dependent unconditional: 15, unknown: 590, unknown conditional: 0, unknown unconditional: 590] , Statistics on independence cache: Total cache size (in pairs): 13, Positive cache size: 10, Positive conditional cache size: 0, Positive unconditional cache size: 10, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 722]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 84 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 12.1s, OverallIterations: 12, TraceHistogramMax: 6, PathProgramHistogramMax: 9, EmptinessCheckTime: 0.0s, AutomataDifference: 5.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1344 SdHoareTripleChecker+Valid, 1.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1344 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 141 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1542 IncrementalHoareTripleChecker+Invalid, 1683 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 141 mSolverCounterUnsat, 0 mSDtfsCounter, 1542 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 367 GetRequests, 132 SyntacticMatches, 2 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1784 ImplicationChecksByTransitivity, 2.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3565occurred in iteration=11, InterpolantAutomatonStates: 172, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.7s InterpolantComputationTime, 252 NumberOfCodeBlocks, 252 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 313 ConstructedInterpolants, 0 QuantifiedInterpolants, 1243 SizeOfPredicates, 34 NumberOfNonLiveVariables, 1015 ConjunctsInSsa, 77 ConjunctsInUnsatCore, 25 InterpolantComputations, 6 PerfectInterpolantSequences, 57/203 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-01-27 17:44:24,073 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...