/usr/bin/java -Xmx8000000000 -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-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/triangular-longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-?-0612a5f-m [2022-09-20 20:27:36,244 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-09-20 20:27:36,246 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-09-20 20:27:36,282 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-09-20 20:27:36,283 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-09-20 20:27:36,286 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-09-20 20:27:36,288 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-09-20 20:27:36,294 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-09-20 20:27:36,296 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-09-20 20:27:36,301 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-09-20 20:27:36,302 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-09-20 20:27:36,302 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-09-20 20:27:36,303 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-09-20 20:27:36,303 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-09-20 20:27:36,304 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-09-20 20:27:36,305 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-09-20 20:27:36,305 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-09-20 20:27:36,306 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-09-20 20:27:36,307 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-09-20 20:27:36,308 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-09-20 20:27:36,309 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-09-20 20:27:36,312 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-09-20 20:27:36,315 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-09-20 20:27:36,317 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-09-20 20:27:36,325 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-09-20 20:27:36,328 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-09-20 20:27:36,329 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-09-20 20:27:36,330 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-09-20 20:27:36,331 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-09-20 20:27:36,332 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-09-20 20:27:36,332 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-09-20 20:27:36,332 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-09-20 20:27:36,332 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-09-20 20:27:36,333 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-09-20 20:27:36,334 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-09-20 20:27:36,334 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-09-20 20:27:36,335 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-NoLbe.epf [2022-09-20 20:27:36,376 INFO L113 SettingsManager]: Loading preferences was successful [2022-09-20 20:27:36,376 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-09-20 20:27:36,377 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-09-20 20:27:36,377 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-09-20 20:27:36,378 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-09-20 20:27:36,378 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-09-20 20:27:36,378 INFO L138 SettingsManager]: * Use SBE=true [2022-09-20 20:27:36,378 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-09-20 20:27:36,378 INFO L138 SettingsManager]: * sizeof long=4 [2022-09-20 20:27:36,378 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-09-20 20:27:36,379 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-09-20 20:27:36,379 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-09-20 20:27:36,379 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-09-20 20:27:36,380 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-09-20 20:27:36,380 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-09-20 20:27:36,380 INFO L138 SettingsManager]: * sizeof long double=12 [2022-09-20 20:27:36,380 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-09-20 20:27:36,380 INFO L138 SettingsManager]: * Use constant arrays=true [2022-09-20 20:27:36,380 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-09-20 20:27:36,380 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-09-20 20:27:36,380 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-09-20 20:27:36,380 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-09-20 20:27:36,381 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-09-20 20:27:36,381 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-20 20:27:36,381 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-09-20 20:27:36,381 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-09-20 20:27:36,381 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-09-20 20:27:36,381 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-09-20 20:27:36,381 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-09-20 20:27:36,381 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-09-20 20:27:36,382 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-09-20 20:27:36,382 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-09-20 20:27:36,625 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-09-20 20:27:36,652 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-09-20 20:27:36,654 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-09-20 20:27:36,655 INFO L271 PluginConnector]: Initializing CDTParser... [2022-09-20 20:27:36,655 INFO L275 PluginConnector]: CDTParser initialized [2022-09-20 20:27:36,656 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-1.i [2022-09-20 20:27:36,703 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a841a4309/a0e78eeaf66247c588c9ae25822907d8/FLAG06c1a0830 [2022-09-20 20:27:37,126 INFO L306 CDTParser]: Found 1 translation units. [2022-09-20 20:27:37,127 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-1.i [2022-09-20 20:27:37,143 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a841a4309/a0e78eeaf66247c588c9ae25822907d8/FLAG06c1a0830 [2022-09-20 20:27:37,445 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a841a4309/a0e78eeaf66247c588c9ae25822907d8 [2022-09-20 20:27:37,448 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-09-20 20:27:37,449 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-09-20 20:27:37,450 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-09-20 20:27:37,450 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-09-20 20:27:37,452 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-09-20 20:27:37,453 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 08:27:37" (1/1) ... [2022-09-20 20:27:37,455 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21e1ced and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:27:37, skipping insertion in model container [2022-09-20 20:27:37,455 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 08:27:37" (1/1) ... [2022-09-20 20:27:37,461 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-09-20 20:27:37,495 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-09-20 20:27:37,747 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-1.i[30961,30974] [2022-09-20 20:27:37,750 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-09-20 20:27:37,756 INFO L203 MainTranslator]: Completed pre-run [2022-09-20 20:27:37,789 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-1.i[30961,30974] [2022-09-20 20:27:37,790 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-09-20 20:27:37,816 INFO L208 MainTranslator]: Completed translation [2022-09-20 20:27:37,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:27:37 WrapperNode [2022-09-20 20:27:37,817 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-09-20 20:27:37,818 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-09-20 20:27:37,818 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-09-20 20:27:37,818 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-09-20 20:27:37,824 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:27:37" (1/1) ... [2022-09-20 20:27:37,835 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:27:37" (1/1) ... [2022-09-20 20:27:37,851 INFO L138 Inliner]: procedures = 169, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 47 [2022-09-20 20:27:37,851 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-09-20 20:27:37,852 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-09-20 20:27:37,852 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-09-20 20:27:37,852 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-09-20 20:27:37,858 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:27:37" (1/1) ... [2022-09-20 20:27:37,859 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:27:37" (1/1) ... [2022-09-20 20:27:37,861 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:27:37" (1/1) ... [2022-09-20 20:27:37,861 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:27:37" (1/1) ... [2022-09-20 20:27:37,865 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:27:37" (1/1) ... [2022-09-20 20:27:37,868 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:27:37" (1/1) ... [2022-09-20 20:27:37,869 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:27:37" (1/1) ... [2022-09-20 20:27:37,871 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-09-20 20:27:37,871 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-09-20 20:27:37,872 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-09-20 20:27:37,872 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-09-20 20:27:37,872 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:27:37" (1/1) ... [2022-09-20 20:27:37,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-20 20:27:37,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 20:27:37,904 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) [2022-09-20 20:27:37,918 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 [2022-09-20 20:27:37,949 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-09-20 20:27:37,950 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-09-20 20:27:37,950 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-09-20 20:27:37,950 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-09-20 20:27:37,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-09-20 20:27:37,950 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-09-20 20:27:37,950 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-09-20 20:27:37,950 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-09-20 20:27:37,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-09-20 20:27:37,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-09-20 20:27:37,950 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-09-20 20:27:37,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-09-20 20:27:37,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-09-20 20:27:37,952 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-09-20 20:27:38,059 INFO L234 CfgBuilder]: Building ICFG [2022-09-20 20:27:38,061 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-09-20 20:27:38,224 INFO L275 CfgBuilder]: Performing block encoding [2022-09-20 20:27:38,230 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-09-20 20:27:38,230 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-09-20 20:27:38,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 08:27:38 BoogieIcfgContainer [2022-09-20 20:27:38,232 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-09-20 20:27:38,234 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-09-20 20:27:38,234 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-09-20 20:27:38,237 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-09-20 20:27:38,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 08:27:37" (1/3) ... [2022-09-20 20:27:38,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31f8a9af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 08:27:38, skipping insertion in model container [2022-09-20 20:27:38,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:27:37" (2/3) ... [2022-09-20 20:27:38,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31f8a9af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 08:27:38, skipping insertion in model container [2022-09-20 20:27:38,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 08:27:38" (3/3) ... [2022-09-20 20:27:38,239 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2022-09-20 20:27:38,254 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-09-20 20:27:38,254 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-09-20 20:27:38,254 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-09-20 20:27:38,291 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-09-20 20:27:38,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 72 places, 70 transitions, 150 flow [2022-09-20 20:27:38,374 INFO L130 PetriNetUnfolder]: 5/68 cut-off events. [2022-09-20 20:27:38,375 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-09-20 20:27:38,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 68 events. 5/68 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 62 event pairs, 0 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2022-09-20 20:27:38,383 INFO L82 GeneralOperation]: Start removeDead. Operand has 72 places, 70 transitions, 150 flow [2022-09-20 20:27:38,388 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 68 transitions, 142 flow [2022-09-20 20:27:38,396 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-09-20 20:27:38,402 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;@5be94b0a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-09-20 20:27:38,402 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-09-20 20:27:38,419 INFO L130 PetriNetUnfolder]: 5/60 cut-off events. [2022-09-20 20:27:38,420 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-09-20 20:27:38,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:27:38,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:27:38,421 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:27:38,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:27:38,426 INFO L85 PathProgramCache]: Analyzing trace with hash 398220865, now seen corresponding path program 1 times [2022-09-20 20:27:38,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:27:38,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469394716] [2022-09-20 20:27:38,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:27:38,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:27:38,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:27:38,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 20:27:38,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:27:38,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469394716] [2022-09-20 20:27:38,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469394716] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 20:27:38,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 20:27:38,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-09-20 20:27:38,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044228529] [2022-09-20 20:27:38,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 20:27:38,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-09-20 20:27:38,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:27:38,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-09-20 20:27:38,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-09-20 20:27:38,908 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-09-20 20:27:38,912 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 68 transitions, 142 flow. Second operand has 6 states, 6 states have (on average 56.333333333333336) internal successors, (338), 6 states have internal predecessors, (338), 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) [2022-09-20 20:27:38,912 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:27:38,912 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-09-20 20:27:38,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:27:39,101 INFO L130 PetriNetUnfolder]: 42/203 cut-off events. [2022-09-20 20:27:39,101 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-09-20 20:27:39,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 283 conditions, 203 events. 42/203 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 766 event pairs, 3 based on Foata normal form. 45/231 useless extension candidates. Maximal degree in co-relation 250. Up to 28 conditions per place. [2022-09-20 20:27:39,104 INFO L137 encePairwiseOnDemand]: 59/70 looper letters, 22 selfloop transitions, 17 changer transitions 0/92 dead transitions. [2022-09-20 20:27:39,105 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 92 transitions, 271 flow [2022-09-20 20:27:39,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-09-20 20:27:39,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-09-20 20:27:39,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 613 transitions. [2022-09-20 20:27:39,119 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8757142857142857 [2022-09-20 20:27:39,119 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 613 transitions. [2022-09-20 20:27:39,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 613 transitions. [2022-09-20 20:27:39,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:27:39,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 613 transitions. [2022-09-20 20:27:39,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 61.3) internal successors, (613), 10 states have internal predecessors, (613), 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) [2022-09-20 20:27:39,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 70.0) internal successors, (770), 11 states have internal predecessors, (770), 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) [2022-09-20 20:27:39,137 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 70.0) internal successors, (770), 11 states have internal predecessors, (770), 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) [2022-09-20 20:27:39,139 INFO L175 Difference]: Start difference. First operand has 70 places, 68 transitions, 142 flow. Second operand 10 states and 613 transitions. [2022-09-20 20:27:39,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 92 transitions, 271 flow [2022-09-20 20:27:39,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 92 transitions, 268 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-09-20 20:27:39,145 INFO L231 Difference]: Finished difference. Result has 85 places, 85 transitions, 276 flow [2022-09-20 20:27:39,147 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=276, PETRI_PLACES=85, PETRI_TRANSITIONS=85} [2022-09-20 20:27:39,150 INFO L287 CegarLoopForPetriNet]: 70 programPoint places, 15 predicate places. [2022-09-20 20:27:39,150 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 85 transitions, 276 flow [2022-09-20 20:27:39,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.333333333333336) internal successors, (338), 6 states have internal predecessors, (338), 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) [2022-09-20 20:27:39,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:27:39,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:27:39,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-09-20 20:27:39,151 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:27:39,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:27:39,152 INFO L85 PathProgramCache]: Analyzing trace with hash 245149124, now seen corresponding path program 1 times [2022-09-20 20:27:39,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:27:39,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488532629] [2022-09-20 20:27:39,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:27:39,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:27:39,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:27:39,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 20:27:39,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:27:39,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488532629] [2022-09-20 20:27:39,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488532629] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 20:27:39,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 20:27:39,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-09-20 20:27:39,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325814569] [2022-09-20 20:27:39,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 20:27:39,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-09-20 20:27:39,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:27:39,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-09-20 20:27:39,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-09-20 20:27:39,310 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-09-20 20:27:39,310 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 85 transitions, 276 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 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) [2022-09-20 20:27:39,311 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:27:39,311 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-09-20 20:27:39,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:27:39,479 INFO L130 PetriNetUnfolder]: 46/219 cut-off events. [2022-09-20 20:27:39,479 INFO L131 PetriNetUnfolder]: For 116/121 co-relation queries the response was YES. [2022-09-20 20:27:39,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 422 conditions, 219 events. 46/219 cut-off events. For 116/121 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 854 event pairs, 0 based on Foata normal form. 3/207 useless extension candidates. Maximal degree in co-relation 378. Up to 35 conditions per place. [2022-09-20 20:27:39,489 INFO L137 encePairwiseOnDemand]: 63/70 looper letters, 16 selfloop transitions, 9 changer transitions 40/110 dead transitions. [2022-09-20 20:27:39,494 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 110 transitions, 508 flow [2022-09-20 20:27:39,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-09-20 20:27:39,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-09-20 20:27:39,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 475 transitions. [2022-09-20 20:27:39,498 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8482142857142857 [2022-09-20 20:27:39,498 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 475 transitions. [2022-09-20 20:27:39,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 475 transitions. [2022-09-20 20:27:39,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:27:39,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 475 transitions. [2022-09-20 20:27:39,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 59.375) internal successors, (475), 8 states have internal predecessors, (475), 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) [2022-09-20 20:27:39,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 states have internal predecessors, (630), 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) [2022-09-20 20:27:39,502 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 states have internal predecessors, (630), 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) [2022-09-20 20:27:39,503 INFO L175 Difference]: Start difference. First operand has 85 places, 85 transitions, 276 flow. Second operand 8 states and 475 transitions. [2022-09-20 20:27:39,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 110 transitions, 508 flow [2022-09-20 20:27:39,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 110 transitions, 508 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-09-20 20:27:39,507 INFO L231 Difference]: Finished difference. Result has 96 places, 67 transitions, 237 flow [2022-09-20 20:27:39,507 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=237, PETRI_PLACES=96, PETRI_TRANSITIONS=67} [2022-09-20 20:27:39,508 INFO L287 CegarLoopForPetriNet]: 70 programPoint places, 26 predicate places. [2022-09-20 20:27:39,508 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 67 transitions, 237 flow [2022-09-20 20:27:39,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 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) [2022-09-20 20:27:39,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:27:39,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:27:39,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-09-20 20:27:39,509 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:27:39,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:27:39,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1444168350, now seen corresponding path program 1 times [2022-09-20 20:27:39,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:27:39,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232093175] [2022-09-20 20:27:39,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:27:39,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:27:39,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:27:39,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 20:27:39,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:27:39,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232093175] [2022-09-20 20:27:39,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232093175] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 20:27:39,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 20:27:39,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-09-20 20:27:39,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560447347] [2022-09-20 20:27:39,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 20:27:39,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-09-20 20:27:39,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:27:39,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-09-20 20:27:39,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-09-20 20:27:39,659 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-09-20 20:27:39,660 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 67 transitions, 237 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 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) [2022-09-20 20:27:39,660 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:27:39,660 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-09-20 20:27:39,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:27:39,760 INFO L130 PetriNetUnfolder]: 37/195 cut-off events. [2022-09-20 20:27:39,760 INFO L131 PetriNetUnfolder]: For 254/263 co-relation queries the response was YES. [2022-09-20 20:27:39,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 411 conditions, 195 events. 37/195 cut-off events. For 254/263 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 646 event pairs, 0 based on Foata normal form. 12/188 useless extension candidates. Maximal degree in co-relation 361. Up to 35 conditions per place. [2022-09-20 20:27:39,763 INFO L137 encePairwiseOnDemand]: 64/70 looper letters, 23 selfloop transitions, 11 changer transitions 8/87 dead transitions. [2022-09-20 20:27:39,763 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 87 transitions, 457 flow [2022-09-20 20:27:39,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-09-20 20:27:39,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-09-20 20:27:39,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 530 transitions. [2022-09-20 20:27:39,765 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8412698412698413 [2022-09-20 20:27:39,765 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 530 transitions. [2022-09-20 20:27:39,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 530 transitions. [2022-09-20 20:27:39,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:27:39,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 530 transitions. [2022-09-20 20:27:39,767 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 58.888888888888886) internal successors, (530), 9 states have internal predecessors, (530), 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) [2022-09-20 20:27:39,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 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) [2022-09-20 20:27:39,770 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 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) [2022-09-20 20:27:39,770 INFO L175 Difference]: Start difference. First operand has 96 places, 67 transitions, 237 flow. Second operand 9 states and 530 transitions. [2022-09-20 20:27:39,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 87 transitions, 457 flow [2022-09-20 20:27:39,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 87 transitions, 387 flow, removed 25 selfloop flow, removed 9 redundant places. [2022-09-20 20:27:39,780 INFO L231 Difference]: Finished difference. Result has 86 places, 72 transitions, 289 flow [2022-09-20 20:27:39,780 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=289, PETRI_PLACES=86, PETRI_TRANSITIONS=72} [2022-09-20 20:27:39,782 INFO L287 CegarLoopForPetriNet]: 70 programPoint places, 16 predicate places. [2022-09-20 20:27:39,782 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 72 transitions, 289 flow [2022-09-20 20:27:39,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 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) [2022-09-20 20:27:39,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:27:39,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:27:39,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-09-20 20:27:39,783 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:27:39,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:27:39,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1245653052, now seen corresponding path program 2 times [2022-09-20 20:27:39,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:27:39,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660822660] [2022-09-20 20:27:39,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:27:39,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:27:39,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:27:39,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 20:27:39,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:27:39,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660822660] [2022-09-20 20:27:39,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660822660] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 20:27:39,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 20:27:39,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-09-20 20:27:39,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080188434] [2022-09-20 20:27:39,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 20:27:39,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-09-20 20:27:39,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:27:39,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-09-20 20:27:39,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-09-20 20:27:39,917 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-09-20 20:27:39,918 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 72 transitions, 289 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 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) [2022-09-20 20:27:39,918 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:27:39,918 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-09-20 20:27:39,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:27:40,021 INFO L130 PetriNetUnfolder]: 30/184 cut-off events. [2022-09-20 20:27:40,022 INFO L131 PetriNetUnfolder]: For 240/261 co-relation queries the response was YES. [2022-09-20 20:27:40,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 404 conditions, 184 events. 30/184 cut-off events. For 240/261 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 615 event pairs, 0 based on Foata normal form. 18/184 useless extension candidates. Maximal degree in co-relation 372. Up to 32 conditions per place. [2022-09-20 20:27:40,023 INFO L137 encePairwiseOnDemand]: 63/70 looper letters, 19 selfloop transitions, 12 changer transitions 11/87 dead transitions. [2022-09-20 20:27:40,023 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 87 transitions, 487 flow [2022-09-20 20:27:40,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-09-20 20:27:40,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-09-20 20:27:40,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 524 transitions. [2022-09-20 20:27:40,025 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8317460317460318 [2022-09-20 20:27:40,026 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 524 transitions. [2022-09-20 20:27:40,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 524 transitions. [2022-09-20 20:27:40,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:27:40,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 524 transitions. [2022-09-20 20:27:40,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 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) [2022-09-20 20:27:40,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 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) [2022-09-20 20:27:40,029 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 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) [2022-09-20 20:27:40,029 INFO L175 Difference]: Start difference. First operand has 86 places, 72 transitions, 289 flow. Second operand 9 states and 524 transitions. [2022-09-20 20:27:40,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 87 transitions, 487 flow [2022-09-20 20:27:40,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 87 transitions, 467 flow, removed 6 selfloop flow, removed 3 redundant places. [2022-09-20 20:27:40,033 INFO L231 Difference]: Finished difference. Result has 93 places, 73 transitions, 332 flow [2022-09-20 20:27:40,033 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=332, PETRI_PLACES=93, PETRI_TRANSITIONS=73} [2022-09-20 20:27:40,034 INFO L287 CegarLoopForPetriNet]: 70 programPoint places, 23 predicate places. [2022-09-20 20:27:40,034 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 73 transitions, 332 flow [2022-09-20 20:27:40,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 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) [2022-09-20 20:27:40,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:27:40,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:27:40,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-09-20 20:27:40,039 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:27:40,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:27:40,040 INFO L85 PathProgramCache]: Analyzing trace with hash -150168411, now seen corresponding path program 1 times [2022-09-20 20:27:40,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:27:40,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206121196] [2022-09-20 20:27:40,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:27:40,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:27:40,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:27:40,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 20:27:40,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:27:40,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206121196] [2022-09-20 20:27:40,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206121196] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 20:27:40,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 20:27:40,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-09-20 20:27:40,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471330085] [2022-09-20 20:27:40,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 20:27:40,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-09-20 20:27:40,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:27:40,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-09-20 20:27:40,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-09-20 20:27:40,124 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-09-20 20:27:40,125 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 73 transitions, 332 flow. Second operand has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 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) [2022-09-20 20:27:40,125 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:27:40,125 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-09-20 20:27:40,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:27:40,251 INFO L130 PetriNetUnfolder]: 43/227 cut-off events. [2022-09-20 20:27:40,252 INFO L131 PetriNetUnfolder]: For 605/629 co-relation queries the response was YES. [2022-09-20 20:27:40,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 582 conditions, 227 events. 43/227 cut-off events. For 605/629 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 793 event pairs, 1 based on Foata normal form. 17/223 useless extension candidates. Maximal degree in co-relation 528. Up to 50 conditions per place. [2022-09-20 20:27:40,254 INFO L137 encePairwiseOnDemand]: 63/70 looper letters, 23 selfloop transitions, 21 changer transitions 8/97 dead transitions. [2022-09-20 20:27:40,254 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 97 transitions, 660 flow [2022-09-20 20:27:40,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-09-20 20:27:40,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-09-20 20:27:40,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 644 transitions. [2022-09-20 20:27:40,256 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8363636363636363 [2022-09-20 20:27:40,256 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 644 transitions. [2022-09-20 20:27:40,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 644 transitions. [2022-09-20 20:27:40,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:27:40,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 644 transitions. [2022-09-20 20:27:40,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 58.54545454545455) internal successors, (644), 11 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:27:40,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 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) [2022-09-20 20:27:40,260 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 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) [2022-09-20 20:27:40,260 INFO L175 Difference]: Start difference. First operand has 93 places, 73 transitions, 332 flow. Second operand 11 states and 644 transitions. [2022-09-20 20:27:40,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 97 transitions, 660 flow [2022-09-20 20:27:40,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 97 transitions, 544 flow, removed 45 selfloop flow, removed 10 redundant places. [2022-09-20 20:27:40,264 INFO L231 Difference]: Finished difference. Result has 97 places, 79 transitions, 417 flow [2022-09-20 20:27:40,264 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=417, PETRI_PLACES=97, PETRI_TRANSITIONS=79} [2022-09-20 20:27:40,265 INFO L287 CegarLoopForPetriNet]: 70 programPoint places, 27 predicate places. [2022-09-20 20:27:40,265 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 79 transitions, 417 flow [2022-09-20 20:27:40,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 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) [2022-09-20 20:27:40,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:27:40,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:27:40,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-09-20 20:27:40,266 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:27:40,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:27:40,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1283973881, now seen corresponding path program 2 times [2022-09-20 20:27:40,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:27:40,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165301402] [2022-09-20 20:27:40,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:27:40,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:27:40,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:27:40,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 20:27:40,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:27:40,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165301402] [2022-09-20 20:27:40,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165301402] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 20:27:40,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 20:27:40,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-09-20 20:27:40,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906875422] [2022-09-20 20:27:40,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 20:27:40,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-09-20 20:27:40,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:27:40,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-09-20 20:27:40,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-09-20 20:27:40,347 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-09-20 20:27:40,348 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 79 transitions, 417 flow. Second operand has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 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) [2022-09-20 20:27:40,348 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:27:40,348 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-09-20 20:27:40,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:27:40,471 INFO L130 PetriNetUnfolder]: 36/216 cut-off events. [2022-09-20 20:27:40,471 INFO L131 PetriNetUnfolder]: For 788/823 co-relation queries the response was YES. [2022-09-20 20:27:40,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 602 conditions, 216 events. 36/216 cut-off events. For 788/823 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 766 event pairs, 1 based on Foata normal form. 27/223 useless extension candidates. Maximal degree in co-relation 558. Up to 44 conditions per place. [2022-09-20 20:27:40,473 INFO L137 encePairwiseOnDemand]: 63/70 looper letters, 20 selfloop transitions, 21 changer transitions 11/97 dead transitions. [2022-09-20 20:27:40,473 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 97 transitions, 749 flow [2022-09-20 20:27:40,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-09-20 20:27:40,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-09-20 20:27:40,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 638 transitions. [2022-09-20 20:27:40,476 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8285714285714286 [2022-09-20 20:27:40,476 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 638 transitions. [2022-09-20 20:27:40,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 638 transitions. [2022-09-20 20:27:40,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:27:40,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 638 transitions. [2022-09-20 20:27:40,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 58.0) internal successors, (638), 11 states have internal predecessors, (638), 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) [2022-09-20 20:27:40,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 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) [2022-09-20 20:27:40,480 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 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) [2022-09-20 20:27:40,480 INFO L175 Difference]: Start difference. First operand has 97 places, 79 transitions, 417 flow. Second operand 11 states and 638 transitions. [2022-09-20 20:27:40,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 97 transitions, 749 flow [2022-09-20 20:27:40,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 97 transitions, 693 flow, removed 19 selfloop flow, removed 5 redundant places. [2022-09-20 20:27:40,485 INFO L231 Difference]: Finished difference. Result has 104 places, 80 transitions, 470 flow [2022-09-20 20:27:40,486 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=470, PETRI_PLACES=104, PETRI_TRANSITIONS=80} [2022-09-20 20:27:40,486 INFO L287 CegarLoopForPetriNet]: 70 programPoint places, 34 predicate places. [2022-09-20 20:27:40,486 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 80 transitions, 470 flow [2022-09-20 20:27:40,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 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) [2022-09-20 20:27:40,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:27:40,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:27:40,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-09-20 20:27:40,487 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:27:40,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:27:40,488 INFO L85 PathProgramCache]: Analyzing trace with hash -949175033, now seen corresponding path program 3 times [2022-09-20 20:27:40,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:27:40,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659175290] [2022-09-20 20:27:40,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:27:40,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:27:40,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:27:40,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 20:27:40,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:27:40,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659175290] [2022-09-20 20:27:40,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659175290] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 20:27:40,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 20:27:40,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-09-20 20:27:40,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121205850] [2022-09-20 20:27:40,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 20:27:40,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-09-20 20:27:40,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:27:40,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-09-20 20:27:40,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-09-20 20:27:40,567 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-09-20 20:27:40,568 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 80 transitions, 470 flow. Second operand has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 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) [2022-09-20 20:27:40,568 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:27:40,568 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-09-20 20:27:40,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:27:40,707 INFO L130 PetriNetUnfolder]: 35/201 cut-off events. [2022-09-20 20:27:40,708 INFO L131 PetriNetUnfolder]: For 899/928 co-relation queries the response was YES. [2022-09-20 20:27:40,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 604 conditions, 201 events. 35/201 cut-off events. For 899/928 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 722 event pairs, 0 based on Foata normal form. 23/207 useless extension candidates. Maximal degree in co-relation 556. Up to 42 conditions per place. [2022-09-20 20:27:40,710 INFO L137 encePairwiseOnDemand]: 63/70 looper letters, 25 selfloop transitions, 17 changer transitions 5/92 dead transitions. [2022-09-20 20:27:40,710 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 92 transitions, 718 flow [2022-09-20 20:27:40,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-09-20 20:27:40,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-09-20 20:27:40,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 695 transitions. [2022-09-20 20:27:40,712 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8273809523809523 [2022-09-20 20:27:40,712 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 695 transitions. [2022-09-20 20:27:40,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 695 transitions. [2022-09-20 20:27:40,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:27:40,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 695 transitions. [2022-09-20 20:27:40,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 57.916666666666664) internal successors, (695), 12 states have internal predecessors, (695), 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) [2022-09-20 20:27:40,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 70.0) internal successors, (910), 13 states have internal predecessors, (910), 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) [2022-09-20 20:27:40,716 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 70.0) internal successors, (910), 13 states have internal predecessors, (910), 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) [2022-09-20 20:27:40,717 INFO L175 Difference]: Start difference. First operand has 104 places, 80 transitions, 470 flow. Second operand 12 states and 695 transitions. [2022-09-20 20:27:40,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 92 transitions, 718 flow [2022-09-20 20:27:40,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 92 transitions, 644 flow, removed 19 selfloop flow, removed 9 redundant places. [2022-09-20 20:27:40,722 INFO L231 Difference]: Finished difference. Result has 107 places, 83 transitions, 503 flow [2022-09-20 20:27:40,722 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=414, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=503, PETRI_PLACES=107, PETRI_TRANSITIONS=83} [2022-09-20 20:27:40,723 INFO L287 CegarLoopForPetriNet]: 70 programPoint places, 37 predicate places. [2022-09-20 20:27:40,723 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 83 transitions, 503 flow [2022-09-20 20:27:40,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 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) [2022-09-20 20:27:40,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:27:40,724 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:27:40,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-09-20 20:27:40,724 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:27:40,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:27:40,725 INFO L85 PathProgramCache]: Analyzing trace with hash 270829877, now seen corresponding path program 1 times [2022-09-20 20:27:40,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:27:40,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126907202] [2022-09-20 20:27:40,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:27:40,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:27:40,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:27:40,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 20:27:40,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:27:40,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126907202] [2022-09-20 20:27:40,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126907202] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 20:27:40,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229855803] [2022-09-20 20:27:40,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:27:40,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 20:27:40,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 20:27:40,795 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) [2022-09-20 20:27:40,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-09-20 20:27:40,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:27:40,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 9 conjunts are in the unsatisfiable core [2022-09-20 20:27:40,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 20:27:41,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 20:27:41,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 20:27:41,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 20:27:41,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229855803] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 20:27:41,273 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 20:27:41,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-09-20 20:27:41,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391053452] [2022-09-20 20:27:41,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 20:27:41,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-09-20 20:27:41,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:27:41,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-09-20 20:27:41,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-09-20 20:27:41,279 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-09-20 20:27:41,280 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 83 transitions, 503 flow. Second operand has 13 states, 13 states have (on average 56.61538461538461) internal successors, (736), 13 states have internal predecessors, (736), 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) [2022-09-20 20:27:41,280 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:27:41,280 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-09-20 20:27:41,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:27:41,580 INFO L130 PetriNetUnfolder]: 53/299 cut-off events. [2022-09-20 20:27:41,580 INFO L131 PetriNetUnfolder]: For 1219/1259 co-relation queries the response was YES. [2022-09-20 20:27:41,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 890 conditions, 299 events. 53/299 cut-off events. For 1219/1259 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1132 event pairs, 1 based on Foata normal form. 28/298 useless extension candidates. Maximal degree in co-relation 843. Up to 64 conditions per place. [2022-09-20 20:27:41,583 INFO L137 encePairwiseOnDemand]: 63/70 looper letters, 27 selfloop transitions, 36 changer transitions 14/122 dead transitions. [2022-09-20 20:27:41,584 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 122 transitions, 1187 flow [2022-09-20 20:27:41,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-09-20 20:27:41,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-09-20 20:27:41,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1159 transitions. [2022-09-20 20:27:41,587 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8278571428571428 [2022-09-20 20:27:41,587 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1159 transitions. [2022-09-20 20:27:41,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1159 transitions. [2022-09-20 20:27:41,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:27:41,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1159 transitions. [2022-09-20 20:27:41,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 57.95) internal successors, (1159), 20 states have internal predecessors, (1159), 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) [2022-09-20 20:27:41,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 70.0) internal successors, (1470), 21 states have internal predecessors, (1470), 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) [2022-09-20 20:27:41,594 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 70.0) internal successors, (1470), 21 states have internal predecessors, (1470), 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) [2022-09-20 20:27:41,594 INFO L175 Difference]: Start difference. First operand has 107 places, 83 transitions, 503 flow. Second operand 20 states and 1159 transitions. [2022-09-20 20:27:41,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 122 transitions, 1187 flow [2022-09-20 20:27:41,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 122 transitions, 1151 flow, removed 10 selfloop flow, removed 7 redundant places. [2022-09-20 20:27:41,601 INFO L231 Difference]: Finished difference. Result has 127 places, 99 transitions, 828 flow [2022-09-20 20:27:41,601 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=467, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=828, PETRI_PLACES=127, PETRI_TRANSITIONS=99} [2022-09-20 20:27:41,602 INFO L287 CegarLoopForPetriNet]: 70 programPoint places, 57 predicate places. [2022-09-20 20:27:41,602 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 99 transitions, 828 flow [2022-09-20 20:27:41,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 56.61538461538461) internal successors, (736), 13 states have internal predecessors, (736), 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) [2022-09-20 20:27:41,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:27:41,603 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:27:41,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-09-20 20:27:41,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 20:27:41,824 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:27:41,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:27:41,824 INFO L85 PathProgramCache]: Analyzing trace with hash -336228454, now seen corresponding path program 1 times [2022-09-20 20:27:41,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:27:41,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787516973] [2022-09-20 20:27:41,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:27:41,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:27:41,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:27:41,952 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-09-20 20:27:41,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:27:41,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787516973] [2022-09-20 20:27:41,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787516973] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 20:27:41,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740236482] [2022-09-20 20:27:41,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:27:41,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 20:27:41,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 20:27:41,954 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) [2022-09-20 20:27:41,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-09-20 20:27:42,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:27:42,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 11 conjunts are in the unsatisfiable core [2022-09-20 20:27:42,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 20:27:42,155 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-09-20 20:27:42,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 20:27:42,378 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-09-20 20:27:42,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740236482] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 20:27:42,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 20:27:42,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-09-20 20:27:42,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287701734] [2022-09-20 20:27:42,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 20:27:42,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-09-20 20:27:42,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:27:42,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-09-20 20:27:42,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-09-20 20:27:42,384 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-09-20 20:27:42,385 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 99 transitions, 828 flow. Second operand has 17 states, 17 states have (on average 56.64705882352941) internal successors, (963), 17 states have internal predecessors, (963), 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) [2022-09-20 20:27:42,386 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:27:42,386 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-09-20 20:27:42,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:27:42,728 INFO L130 PetriNetUnfolder]: 75/452 cut-off events. [2022-09-20 20:27:42,729 INFO L131 PetriNetUnfolder]: For 3341/3397 co-relation queries the response was YES. [2022-09-20 20:27:42,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1569 conditions, 452 events. 75/452 cut-off events. For 3341/3397 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1806 event pairs, 0 based on Foata normal form. 31/437 useless extension candidates. Maximal degree in co-relation 1506. Up to 100 conditions per place. [2022-09-20 20:27:42,734 INFO L137 encePairwiseOnDemand]: 64/70 looper letters, 58 selfloop transitions, 25 changer transitions 26/154 dead transitions. [2022-09-20 20:27:42,734 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 154 transitions, 2060 flow [2022-09-20 20:27:42,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-09-20 20:27:42,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-09-20 20:27:42,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1450 transitions. [2022-09-20 20:27:42,739 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8285714285714286 [2022-09-20 20:27:42,739 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1450 transitions. [2022-09-20 20:27:42,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1450 transitions. [2022-09-20 20:27:42,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:27:42,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1450 transitions. [2022-09-20 20:27:42,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 58.0) internal successors, (1450), 25 states have internal predecessors, (1450), 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) [2022-09-20 20:27:42,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 70.0) internal successors, (1820), 26 states have internal predecessors, (1820), 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) [2022-09-20 20:27:42,778 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 70.0) internal successors, (1820), 26 states have internal predecessors, (1820), 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) [2022-09-20 20:27:42,778 INFO L175 Difference]: Start difference. First operand has 127 places, 99 transitions, 828 flow. Second operand 25 states and 1450 transitions. [2022-09-20 20:27:42,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 154 transitions, 2060 flow [2022-09-20 20:27:42,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 154 transitions, 1647 flow, removed 189 selfloop flow, removed 12 redundant places. [2022-09-20 20:27:42,789 INFO L231 Difference]: Finished difference. Result has 153 places, 113 transitions, 955 flow [2022-09-20 20:27:42,789 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=627, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=955, PETRI_PLACES=153, PETRI_TRANSITIONS=113} [2022-09-20 20:27:42,790 INFO L287 CegarLoopForPetriNet]: 70 programPoint places, 83 predicate places. [2022-09-20 20:27:42,790 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 113 transitions, 955 flow [2022-09-20 20:27:42,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 56.64705882352941) internal successors, (963), 17 states have internal predecessors, (963), 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) [2022-09-20 20:27:42,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:27:42,791 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:27:42,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-09-20 20:27:43,014 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,SelfDestructingSolverStorable8 [2022-09-20 20:27:43,014 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:27:43,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:27:43,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1596067542, now seen corresponding path program 2 times [2022-09-20 20:27:43,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:27:43,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472861374] [2022-09-20 20:27:43,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:27:43,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:27:43,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:27:43,132 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-09-20 20:27:43,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:27:43,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472861374] [2022-09-20 20:27:43,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472861374] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 20:27:43,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270853653] [2022-09-20 20:27:43,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-09-20 20:27:43,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 20:27:43,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 20:27:43,134 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) [2022-09-20 20:27:43,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-09-20 20:27:43,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-09-20 20:27:43,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 20:27:43,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 11 conjunts are in the unsatisfiable core [2022-09-20 20:27:43,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 20:27:43,352 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-09-20 20:27:43,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 20:27:43,555 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-09-20 20:27:43,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270853653] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 20:27:43,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 20:27:43,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-09-20 20:27:43,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226612519] [2022-09-20 20:27:43,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 20:27:43,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-09-20 20:27:43,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:27:43,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-09-20 20:27:43,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-09-20 20:27:43,558 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-09-20 20:27:43,559 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 113 transitions, 955 flow. Second operand has 18 states, 18 states have (on average 56.666666666666664) internal successors, (1020), 18 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:27:43,559 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:27:43,559 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-09-20 20:27:43,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:27:44,160 INFO L130 PetriNetUnfolder]: 113/712 cut-off events. [2022-09-20 20:27:44,161 INFO L131 PetriNetUnfolder]: For 12122/12272 co-relation queries the response was YES. [2022-09-20 20:27:44,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2934 conditions, 712 events. 113/712 cut-off events. For 12122/12272 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 4163 event pairs, 0 based on Foata normal form. 31/671 useless extension candidates. Maximal degree in co-relation 2855. Up to 148 conditions per place. [2022-09-20 20:27:44,170 INFO L137 encePairwiseOnDemand]: 63/70 looper letters, 59 selfloop transitions, 72 changer transitions 26/202 dead transitions. [2022-09-20 20:27:44,171 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 202 transitions, 3279 flow [2022-09-20 20:27:44,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-09-20 20:27:44,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-09-20 20:27:44,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1851 transitions. [2022-09-20 20:27:44,174 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8263392857142857 [2022-09-20 20:27:44,174 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1851 transitions. [2022-09-20 20:27:44,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1851 transitions. [2022-09-20 20:27:44,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:27:44,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1851 transitions. [2022-09-20 20:27:44,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 57.84375) internal successors, (1851), 32 states have internal predecessors, (1851), 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) [2022-09-20 20:27:44,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 70.0) internal successors, (2310), 33 states have internal predecessors, (2310), 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) [2022-09-20 20:27:44,182 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 70.0) internal successors, (2310), 33 states have internal predecessors, (2310), 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) [2022-09-20 20:27:44,221 INFO L175 Difference]: Start difference. First operand has 153 places, 113 transitions, 955 flow. Second operand 32 states and 1851 transitions. [2022-09-20 20:27:44,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 202 transitions, 3279 flow [2022-09-20 20:27:44,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 202 transitions, 2817 flow, removed 223 selfloop flow, removed 13 redundant places. [2022-09-20 20:27:44,251 INFO L231 Difference]: Finished difference. Result has 185 places, 151 transitions, 1736 flow [2022-09-20 20:27:44,252 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=829, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1736, PETRI_PLACES=185, PETRI_TRANSITIONS=151} [2022-09-20 20:27:44,253 INFO L287 CegarLoopForPetriNet]: 70 programPoint places, 115 predicate places. [2022-09-20 20:27:44,253 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 151 transitions, 1736 flow [2022-09-20 20:27:44,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 56.666666666666664) internal successors, (1020), 18 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 20:27:44,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:27:44,254 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:27:44,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-09-20 20:27:44,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 20:27:44,477 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:27:44,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:27:44,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1214506290, now seen corresponding path program 3 times [2022-09-20 20:27:44,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:27:44,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604153961] [2022-09-20 20:27:44,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:27:44,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:27:44,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:27:44,560 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-09-20 20:27:44,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:27:44,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604153961] [2022-09-20 20:27:44,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604153961] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 20:27:44,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394420543] [2022-09-20 20:27:44,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-09-20 20:27:44,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 20:27:44,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 20:27:44,562 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) [2022-09-20 20:27:44,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-09-20 20:27:44,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-09-20 20:27:44,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 20:27:44,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 11 conjunts are in the unsatisfiable core [2022-09-20 20:27:44,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 20:27:44,720 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-09-20 20:27:44,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 20:27:44,871 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-09-20 20:27:44,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394420543] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 20:27:44,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 20:27:44,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-09-20 20:27:44,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672519524] [2022-09-20 20:27:44,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 20:27:44,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-09-20 20:27:44,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:27:44,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-09-20 20:27:44,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-09-20 20:27:44,874 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-09-20 20:27:44,875 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 151 transitions, 1736 flow. Second operand has 18 states, 18 states have (on average 56.611111111111114) internal successors, (1019), 18 states have internal predecessors, (1019), 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) [2022-09-20 20:27:44,876 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:27:44,876 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-09-20 20:27:44,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:27:45,661 INFO L130 PetriNetUnfolder]: 154/971 cut-off events. [2022-09-20 20:27:45,661 INFO L131 PetriNetUnfolder]: For 31224/31425 co-relation queries the response was YES. [2022-09-20 20:27:45,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4884 conditions, 971 events. 154/971 cut-off events. For 31224/31425 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 6432 event pairs, 0 based on Foata normal form. 42/916 useless extension candidates. Maximal degree in co-relation 4789. Up to 198 conditions per place. [2022-09-20 20:27:45,676 INFO L137 encePairwiseOnDemand]: 63/70 looper letters, 49 selfloop transitions, 128 changer transitions 26/248 dead transitions. [2022-09-20 20:27:45,676 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 248 transitions, 5288 flow [2022-09-20 20:27:45,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-09-20 20:27:45,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-09-20 20:27:45,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2143 transitions. [2022-09-20 20:27:45,680 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8274131274131274 [2022-09-20 20:27:45,680 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2143 transitions. [2022-09-20 20:27:45,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2143 transitions. [2022-09-20 20:27:45,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:27:45,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2143 transitions. [2022-09-20 20:27:45,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 57.91891891891892) internal successors, (2143), 37 states have internal predecessors, (2143), 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) [2022-09-20 20:27:45,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 70.0) internal successors, (2660), 38 states have internal predecessors, (2660), 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) [2022-09-20 20:27:45,689 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 70.0) internal successors, (2660), 38 states have internal predecessors, (2660), 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) [2022-09-20 20:27:45,690 INFO L175 Difference]: Start difference. First operand has 185 places, 151 transitions, 1736 flow. Second operand 37 states and 2143 transitions. [2022-09-20 20:27:45,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 248 transitions, 5288 flow [2022-09-20 20:27:45,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 248 transitions, 4514 flow, removed 374 selfloop flow, removed 16 redundant places. [2022-09-20 20:27:45,746 INFO L231 Difference]: Finished difference. Result has 220 places, 193 transitions, 2781 flow [2022-09-20 20:27:45,746 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=1454, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=2781, PETRI_PLACES=220, PETRI_TRANSITIONS=193} [2022-09-20 20:27:45,747 INFO L287 CegarLoopForPetriNet]: 70 programPoint places, 150 predicate places. [2022-09-20 20:27:45,747 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 193 transitions, 2781 flow [2022-09-20 20:27:45,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 56.611111111111114) internal successors, (1019), 18 states have internal predecessors, (1019), 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) [2022-09-20 20:27:45,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:27:45,748 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:27:45,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-09-20 20:27:45,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 20:27:45,971 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:27:45,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:27:45,971 INFO L85 PathProgramCache]: Analyzing trace with hash 784350032, now seen corresponding path program 4 times [2022-09-20 20:27:45,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:27:45,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627555143] [2022-09-20 20:27:45,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:27:45,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:27:45,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:27:46,110 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 20:27:46,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:27:46,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627555143] [2022-09-20 20:27:46,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627555143] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 20:27:46,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281787523] [2022-09-20 20:27:46,111 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-09-20 20:27:46,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 20:27:46,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 20:27:46,112 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) [2022-09-20 20:27:46,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-09-20 20:27:46,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-09-20 20:27:46,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 20:27:46,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 15 conjunts are in the unsatisfiable core [2022-09-20 20:27:46,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 20:27:46,290 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 20:27:46,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 20:27:46,489 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 20:27:46,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281787523] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 20:27:46,489 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 20:27:46,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 25 [2022-09-20 20:27:46,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173990140] [2022-09-20 20:27:46,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 20:27:46,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-09-20 20:27:46,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:27:46,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-09-20 20:27:46,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2022-09-20 20:27:46,494 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-09-20 20:27:46,495 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 193 transitions, 2781 flow. Second operand has 25 states, 25 states have (on average 56.32) internal successors, (1408), 25 states have internal predecessors, (1408), 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) [2022-09-20 20:27:46,495 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:27:46,495 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-09-20 20:27:46,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:27:47,650 INFO L130 PetriNetUnfolder]: 216/1392 cut-off events. [2022-09-20 20:27:47,650 INFO L131 PetriNetUnfolder]: For 76987/77172 co-relation queries the response was YES. [2022-09-20 20:27:47,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8522 conditions, 1392 events. 216/1392 cut-off events. For 76987/77172 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 9120 event pairs, 1 based on Foata normal form. 42/1290 useless extension candidates. Maximal degree in co-relation 8411. Up to 278 conditions per place. [2022-09-20 20:27:47,676 INFO L137 encePairwiseOnDemand]: 63/70 looper letters, 62 selfloop transitions, 183 changer transitions 32/322 dead transitions. [2022-09-20 20:27:47,676 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 322 transitions, 9410 flow [2022-09-20 20:27:47,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-09-20 20:27:47,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2022-09-20 20:27:47,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 2893 transitions. [2022-09-20 20:27:47,680 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8265714285714286 [2022-09-20 20:27:47,680 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 2893 transitions. [2022-09-20 20:27:47,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 2893 transitions. [2022-09-20 20:27:47,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:27:47,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 2893 transitions. [2022-09-20 20:27:47,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 57.86) internal successors, (2893), 50 states have internal predecessors, (2893), 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) [2022-09-20 20:27:47,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 70.0) internal successors, (3570), 51 states have internal predecessors, (3570), 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) [2022-09-20 20:27:47,692 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 70.0) internal successors, (3570), 51 states have internal predecessors, (3570), 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) [2022-09-20 20:27:47,692 INFO L175 Difference]: Start difference. First operand has 220 places, 193 transitions, 2781 flow. Second operand 50 states and 2893 transitions. [2022-09-20 20:27:47,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 322 transitions, 9410 flow [2022-09-20 20:27:47,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 322 transitions, 6914 flow, removed 1224 selfloop flow, removed 20 redundant places. [2022-09-20 20:27:47,815 INFO L231 Difference]: Finished difference. Result has 271 places, 254 transitions, 4105 flow [2022-09-20 20:27:47,816 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=2187, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=4105, PETRI_PLACES=271, PETRI_TRANSITIONS=254} [2022-09-20 20:27:47,816 INFO L287 CegarLoopForPetriNet]: 70 programPoint places, 201 predicate places. [2022-09-20 20:27:47,816 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 254 transitions, 4105 flow [2022-09-20 20:27:47,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 56.32) internal successors, (1408), 25 states have internal predecessors, (1408), 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) [2022-09-20 20:27:47,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:27:47,817 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:27:47,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-09-20 20:27:48,040 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,SelfDestructingSolverStorable11 [2022-09-20 20:27:48,040 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:27:48,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:27:48,041 INFO L85 PathProgramCache]: Analyzing trace with hash 992522128, now seen corresponding path program 5 times [2022-09-20 20:27:48,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:27:48,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110624297] [2022-09-20 20:27:48,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:27:48,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:27:48,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:27:48,348 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-09-20 20:27:48,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:27:48,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110624297] [2022-09-20 20:27:48,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110624297] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 20:27:48,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811645741] [2022-09-20 20:27:48,349 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-09-20 20:27:48,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 20:27:48,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 20:27:48,352 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) [2022-09-20 20:27:48,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-09-20 20:27:48,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-09-20 20:27:48,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 20:27:48,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 23 conjunts are in the unsatisfiable core [2022-09-20 20:27:48,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 20:27:48,676 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-09-20 20:27:48,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 20:27:49,152 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-09-20 20:27:49,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811645741] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 20:27:49,153 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 20:27:49,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 29 [2022-09-20 20:27:49,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828329084] [2022-09-20 20:27:49,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 20:27:49,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-09-20 20:27:49,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:27:49,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-09-20 20:27:49,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2022-09-20 20:27:49,156 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-09-20 20:27:49,157 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 254 transitions, 4105 flow. Second operand has 29 states, 29 states have (on average 56.37931034482759) internal successors, (1635), 29 states have internal predecessors, (1635), 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) [2022-09-20 20:27:49,157 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:27:49,157 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-09-20 20:27:49,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:27:50,067 INFO L130 PetriNetUnfolder]: 230/1548 cut-off events. [2022-09-20 20:27:50,067 INFO L131 PetriNetUnfolder]: For 108108/108287 co-relation queries the response was YES. [2022-09-20 20:27:50,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9982 conditions, 1548 events. 230/1548 cut-off events. For 108108/108287 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 9803 event pairs, 0 based on Foata normal form. 27/1408 useless extension candidates. Maximal degree in co-relation 9850. Up to 310 conditions per place. [2022-09-20 20:27:50,098 INFO L137 encePairwiseOnDemand]: 64/70 looper letters, 208 selfloop transitions, 47 changer transitions 26/326 dead transitions. [2022-09-20 20:27:50,099 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 326 transitions, 9251 flow [2022-09-20 20:27:50,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-09-20 20:27:50,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-09-20 20:27:50,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2134 transitions. [2022-09-20 20:27:50,110 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8239382239382239 [2022-09-20 20:27:50,110 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2134 transitions. [2022-09-20 20:27:50,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2134 transitions. [2022-09-20 20:27:50,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:27:50,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2134 transitions. [2022-09-20 20:27:50,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 57.67567567567568) internal successors, (2134), 37 states have internal predecessors, (2134), 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) [2022-09-20 20:27:50,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 70.0) internal successors, (2660), 38 states have internal predecessors, (2660), 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) [2022-09-20 20:27:50,129 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 70.0) internal successors, (2660), 38 states have internal predecessors, (2660), 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) [2022-09-20 20:27:50,129 INFO L175 Difference]: Start difference. First operand has 271 places, 254 transitions, 4105 flow. Second operand 37 states and 2134 transitions. [2022-09-20 20:27:50,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 326 transitions, 9251 flow [2022-09-20 20:27:50,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 326 transitions, 7432 flow, removed 884 selfloop flow, removed 18 redundant places. [2022-09-20 20:27:50,341 INFO L231 Difference]: Finished difference. Result has 297 places, 272 transitions, 4055 flow [2022-09-20 20:27:50,341 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=3268, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=4055, PETRI_PLACES=297, PETRI_TRANSITIONS=272} [2022-09-20 20:27:50,342 INFO L287 CegarLoopForPetriNet]: 70 programPoint places, 227 predicate places. [2022-09-20 20:27:50,342 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 272 transitions, 4055 flow [2022-09-20 20:27:50,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 56.37931034482759) internal successors, (1635), 29 states have internal predecessors, (1635), 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) [2022-09-20 20:27:50,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:27:50,343 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:27:50,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-09-20 20:27:50,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 20:27:50,560 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:27:50,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:27:50,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1524146744, now seen corresponding path program 6 times [2022-09-20 20:27:50,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:27:50,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56016649] [2022-09-20 20:27:50,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:27:50,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:27:50,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:27:50,833 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-09-20 20:27:50,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:27:50,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56016649] [2022-09-20 20:27:50,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56016649] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 20:27:50,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338627512] [2022-09-20 20:27:50,834 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-09-20 20:27:50,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 20:27:50,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 20:27:50,836 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) [2022-09-20 20:27:50,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-09-20 20:27:50,927 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-09-20 20:27:50,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 20:27:50,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 23 conjunts are in the unsatisfiable core [2022-09-20 20:27:50,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 20:27:51,187 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-09-20 20:27:51,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 20:27:51,716 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-09-20 20:27:51,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338627512] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 20:27:51,716 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 20:27:51,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 31 [2022-09-20 20:27:51,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327491225] [2022-09-20 20:27:51,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 20:27:51,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-09-20 20:27:51,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:27:51,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-09-20 20:27:51,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=741, Unknown=0, NotChecked=0, Total=930 [2022-09-20 20:27:51,719 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-09-20 20:27:51,721 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 272 transitions, 4055 flow. Second operand has 31 states, 31 states have (on average 56.41935483870968) internal successors, (1749), 31 states have internal predecessors, (1749), 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) [2022-09-20 20:27:51,721 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:27:51,721 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-09-20 20:27:51,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:27:52,906 INFO L130 PetriNetUnfolder]: 288/2028 cut-off events. [2022-09-20 20:27:52,906 INFO L131 PetriNetUnfolder]: For 157989/158395 co-relation queries the response was YES. [2022-09-20 20:27:52,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13065 conditions, 2028 events. 288/2028 cut-off events. For 157989/158395 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 14394 event pairs, 0 based on Foata normal form. 35/1844 useless extension candidates. Maximal degree in co-relation 12925. Up to 424 conditions per place. [2022-09-20 20:27:52,949 INFO L137 encePairwiseOnDemand]: 63/70 looper letters, 164 selfloop transitions, 161 changer transitions 26/396 dead transitions. [2022-09-20 20:27:52,949 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 396 transitions, 10108 flow [2022-09-20 20:27:52,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-09-20 20:27:52,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-09-20 20:27:52,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2535 transitions. [2022-09-20 20:27:52,954 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.823051948051948 [2022-09-20 20:27:52,954 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2535 transitions. [2022-09-20 20:27:52,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2535 transitions. [2022-09-20 20:27:52,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:27:52,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2535 transitions. [2022-09-20 20:27:52,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 57.61363636363637) internal successors, (2535), 44 states have internal predecessors, (2535), 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) [2022-09-20 20:27:52,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 70.0) internal successors, (3150), 45 states have internal predecessors, (3150), 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) [2022-09-20 20:27:52,965 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 70.0) internal successors, (3150), 45 states have internal predecessors, (3150), 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) [2022-09-20 20:27:52,965 INFO L175 Difference]: Start difference. First operand has 297 places, 272 transitions, 4055 flow. Second operand 44 states and 2535 transitions. [2022-09-20 20:27:52,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 396 transitions, 10108 flow [2022-09-20 20:27:53,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 396 transitions, 9187 flow, removed 435 selfloop flow, removed 23 redundant places. [2022-09-20 20:27:53,224 INFO L231 Difference]: Finished difference. Result has 329 places, 329 transitions, 5357 flow [2022-09-20 20:27:53,224 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=3534, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=5357, PETRI_PLACES=329, PETRI_TRANSITIONS=329} [2022-09-20 20:27:53,225 INFO L287 CegarLoopForPetriNet]: 70 programPoint places, 259 predicate places. [2022-09-20 20:27:53,225 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 329 transitions, 5357 flow [2022-09-20 20:27:53,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 56.41935483870968) internal successors, (1749), 31 states have internal predecessors, (1749), 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) [2022-09-20 20:27:53,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:27:53,225 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:27:53,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-09-20 20:27:53,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 20:27:53,426 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:27:53,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:27:53,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1923481798, now seen corresponding path program 7 times [2022-09-20 20:27:53,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:27:53,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893545292] [2022-09-20 20:27:53,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:27:53,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:27:53,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:27:53,687 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-09-20 20:27:53,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:27:53,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893545292] [2022-09-20 20:27:53,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893545292] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 20:27:53,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143888741] [2022-09-20 20:27:53,688 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-09-20 20:27:53,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 20:27:53,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 20:27:53,689 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 20:27:53,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-09-20 20:27:53,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:27:53,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 23 conjunts are in the unsatisfiable core [2022-09-20 20:27:53,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 20:27:53,975 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-09-20 20:27:53,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 20:27:54,454 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-09-20 20:27:54,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143888741] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 20:27:54,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 20:27:54,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 34 [2022-09-20 20:27:54,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118803251] [2022-09-20 20:27:54,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 20:27:54,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-09-20 20:27:54,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:27:54,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-09-20 20:27:54,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=933, Unknown=0, NotChecked=0, Total=1122 [2022-09-20 20:27:54,458 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-09-20 20:27:54,460 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 329 transitions, 5357 flow. Second operand has 34 states, 34 states have (on average 56.38235294117647) internal successors, (1917), 34 states have internal predecessors, (1917), 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) [2022-09-20 20:27:54,460 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:27:54,460 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-09-20 20:27:54,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:27:55,769 INFO L130 PetriNetUnfolder]: 346/2481 cut-off events. [2022-09-20 20:27:55,769 INFO L131 PetriNetUnfolder]: For 241144/241634 co-relation queries the response was YES. [2022-09-20 20:27:55,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17419 conditions, 2481 events. 346/2481 cut-off events. For 241144/241634 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 18926 event pairs, 0 based on Foata normal form. 42/2259 useless extension candidates. Maximal degree in co-relation 17265. Up to 528 conditions per place. [2022-09-20 20:27:55,807 INFO L137 encePairwiseOnDemand]: 63/70 looper letters, 94 selfloop transitions, 298 changer transitions 26/463 dead transitions. [2022-09-20 20:27:55,807 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 463 transitions, 13439 flow [2022-09-20 20:27:55,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-09-20 20:27:55,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-09-20 20:27:55,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3000 transitions. [2022-09-20 20:27:55,811 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8241758241758241 [2022-09-20 20:27:55,811 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3000 transitions. [2022-09-20 20:27:55,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3000 transitions. [2022-09-20 20:27:55,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:27:55,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3000 transitions. [2022-09-20 20:27:55,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 57.69230769230769) internal successors, (3000), 52 states have internal predecessors, (3000), 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) [2022-09-20 20:27:55,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 70.0) internal successors, (3710), 53 states have internal predecessors, (3710), 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) [2022-09-20 20:27:55,820 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 70.0) internal successors, (3710), 53 states have internal predecessors, (3710), 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) [2022-09-20 20:27:55,821 INFO L175 Difference]: Start difference. First operand has 329 places, 329 transitions, 5357 flow. Second operand 52 states and 3000 transitions. [2022-09-20 20:27:55,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 463 transitions, 13439 flow [2022-09-20 20:27:56,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 463 transitions, 11873 flow, removed 704 selfloop flow, removed 30 redundant places. [2022-09-20 20:27:56,140 INFO L231 Difference]: Finished difference. Result has 363 places, 390 transitions, 7126 flow [2022-09-20 20:27:56,140 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=4619, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=7126, PETRI_PLACES=363, PETRI_TRANSITIONS=390} [2022-09-20 20:27:56,140 INFO L287 CegarLoopForPetriNet]: 70 programPoint places, 293 predicate places. [2022-09-20 20:27:56,141 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 390 transitions, 7126 flow [2022-09-20 20:27:56,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 56.38235294117647) internal successors, (1917), 34 states have internal predecessors, (1917), 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) [2022-09-20 20:27:56,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:27:56,141 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:27:56,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-09-20 20:27:56,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-09-20 20:27:56,351 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:27:56,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:27:56,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1604013990, now seen corresponding path program 8 times [2022-09-20 20:27:56,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:27:56,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059331801] [2022-09-20 20:27:56,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:27:56,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:27:56,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:27:56,592 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-09-20 20:27:56,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:27:56,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059331801] [2022-09-20 20:27:56,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059331801] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 20:27:56,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72794498] [2022-09-20 20:27:56,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-09-20 20:27:56,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 20:27:56,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 20:27:56,595 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 20:27:56,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-09-20 20:27:56,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-09-20 20:27:56,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 20:27:56,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 23 conjunts are in the unsatisfiable core [2022-09-20 20:27:56,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 20:27:56,855 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-09-20 20:27:56,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 20:27:57,226 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-09-20 20:27:57,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72794498] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 20:27:57,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 20:27:57,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 35 [2022-09-20 20:27:57,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511892441] [2022-09-20 20:27:57,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 20:27:57,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-09-20 20:27:57,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:27:57,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-09-20 20:27:57,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=997, Unknown=0, NotChecked=0, Total=1190 [2022-09-20 20:27:57,230 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-09-20 20:27:57,231 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 390 transitions, 7126 flow. Second operand has 35 states, 35 states have (on average 56.371428571428574) internal successors, (1973), 35 states have internal predecessors, (1973), 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) [2022-09-20 20:27:57,231 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:27:57,231 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-09-20 20:27:57,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:27:59,085 INFO L130 PetriNetUnfolder]: 414/2906 cut-off events. [2022-09-20 20:27:59,085 INFO L131 PetriNetUnfolder]: For 375796/376372 co-relation queries the response was YES. [2022-09-20 20:27:59,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22707 conditions, 2906 events. 414/2906 cut-off events. For 375796/376372 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 23369 event pairs, 0 based on Foata normal form. 53/2653 useless extension candidates. Maximal degree in co-relation 22539. Up to 624 conditions per place. [2022-09-20 20:27:59,131 INFO L137 encePairwiseOnDemand]: 63/70 looper letters, 82 selfloop transitions, 384 changer transitions 29/540 dead transitions. [2022-09-20 20:27:59,131 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 540 transitions, 17041 flow [2022-09-20 20:27:59,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-09-20 20:27:59,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-09-20 20:27:59,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3465 transitions. [2022-09-20 20:27:59,135 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.825 [2022-09-20 20:27:59,135 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3465 transitions. [2022-09-20 20:27:59,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3465 transitions. [2022-09-20 20:27:59,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:27:59,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3465 transitions. [2022-09-20 20:27:59,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 57.75) internal successors, (3465), 60 states have internal predecessors, (3465), 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) [2022-09-20 20:27:59,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 70.0) internal successors, (4270), 61 states have internal predecessors, (4270), 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) [2022-09-20 20:27:59,145 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 70.0) internal successors, (4270), 61 states have internal predecessors, (4270), 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) [2022-09-20 20:27:59,145 INFO L175 Difference]: Start difference. First operand has 363 places, 390 transitions, 7126 flow. Second operand 60 states and 3465 transitions. [2022-09-20 20:27:59,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 540 transitions, 17041 flow [2022-09-20 20:27:59,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 540 transitions, 14327 flow, removed 1201 selfloop flow, removed 34 redundant places. [2022-09-20 20:27:59,638 INFO L231 Difference]: Finished difference. Result has 404 places, 459 transitions, 8646 flow [2022-09-20 20:27:59,638 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=5778, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=322, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=8646, PETRI_PLACES=404, PETRI_TRANSITIONS=459} [2022-09-20 20:27:59,639 INFO L287 CegarLoopForPetriNet]: 70 programPoint places, 334 predicate places. [2022-09-20 20:27:59,639 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 459 transitions, 8646 flow [2022-09-20 20:27:59,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 56.371428571428574) internal successors, (1973), 35 states have internal predecessors, (1973), 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) [2022-09-20 20:27:59,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:27:59,639 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:27:59,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-09-20 20:27:59,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-09-20 20:27:59,840 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:27:59,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:27:59,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1300780494, now seen corresponding path program 9 times [2022-09-20 20:27:59,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:27:59,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628054472] [2022-09-20 20:27:59,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:27:59,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:27:59,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:28:00,061 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 349 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-09-20 20:28:00,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:28:00,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628054472] [2022-09-20 20:28:00,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628054472] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 20:28:00,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363895548] [2022-09-20 20:28:00,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-09-20 20:28:00,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 20:28:00,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 20:28:00,062 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 20:28:00,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-09-20 20:28:00,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-09-20 20:28:00,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 20:28:00,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 24 conjunts are in the unsatisfiable core [2022-09-20 20:28:00,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 20:28:00,318 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 349 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-09-20 20:28:00,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 20:28:00,582 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 349 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-09-20 20:28:00,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363895548] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 20:28:00,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 20:28:00,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 27 [2022-09-20 20:28:00,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454372186] [2022-09-20 20:28:00,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 20:28:00,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-09-20 20:28:00,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:28:00,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-09-20 20:28:00,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=555, Unknown=0, NotChecked=0, Total=702 [2022-09-20 20:28:00,584 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-09-20 20:28:00,585 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 459 transitions, 8646 flow. Second operand has 27 states, 27 states have (on average 56.407407407407405) internal successors, (1523), 27 states have internal predecessors, (1523), 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) [2022-09-20 20:28:00,585 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:28:00,585 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-09-20 20:28:00,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:28:02,279 INFO L130 PetriNetUnfolder]: 423/2974 cut-off events. [2022-09-20 20:28:02,279 INFO L131 PetriNetUnfolder]: For 441267/441583 co-relation queries the response was YES. [2022-09-20 20:28:02,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24307 conditions, 2974 events. 423/2974 cut-off events. For 441267/441583 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 23837 event pairs, 0 based on Foata normal form. 54/2716 useless extension candidates. Maximal degree in co-relation 24122. Up to 638 conditions per place. [2022-09-20 20:28:02,335 INFO L137 encePairwiseOnDemand]: 63/70 looper letters, 89 selfloop transitions, 388 changer transitions 14/536 dead transitions. [2022-09-20 20:28:02,335 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 536 transitions, 16379 flow [2022-09-20 20:28:02,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-09-20 20:28:02,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-09-20 20:28:02,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 2942 transitions. [2022-09-20 20:28:02,338 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8240896358543417 [2022-09-20 20:28:02,338 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 2942 transitions. [2022-09-20 20:28:02,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 2942 transitions. [2022-09-20 20:28:02,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:28:02,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 2942 transitions. [2022-09-20 20:28:02,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 57.68627450980392) internal successors, (2942), 51 states have internal predecessors, (2942), 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) [2022-09-20 20:28:02,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 70.0) internal successors, (3640), 52 states have internal predecessors, (3640), 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) [2022-09-20 20:28:02,346 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 70.0) internal successors, (3640), 52 states have internal predecessors, (3640), 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) [2022-09-20 20:28:02,347 INFO L175 Difference]: Start difference. First operand has 404 places, 459 transitions, 8646 flow. Second operand 51 states and 2942 transitions. [2022-09-20 20:28:02,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 536 transitions, 16379 flow [2022-09-20 20:28:02,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 536 transitions, 14015 flow, removed 975 selfloop flow, removed 40 redundant places. [2022-09-20 20:28:02,948 INFO L231 Difference]: Finished difference. Result has 416 places, 478 transitions, 8967 flow [2022-09-20 20:28:02,949 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=7122, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=370, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=8967, PETRI_PLACES=416, PETRI_TRANSITIONS=478} [2022-09-20 20:28:02,949 INFO L287 CegarLoopForPetriNet]: 70 programPoint places, 346 predicate places. [2022-09-20 20:28:02,949 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 478 transitions, 8967 flow [2022-09-20 20:28:02,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 56.407407407407405) internal successors, (1523), 27 states have internal predecessors, (1523), 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) [2022-09-20 20:28:02,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:28:02,950 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:28:02,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-09-20 20:28:03,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-09-20 20:28:03,175 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:28:03,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:28:03,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1061765786, now seen corresponding path program 10 times [2022-09-20 20:28:03,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:28:03,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132804416] [2022-09-20 20:28:03,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:28:03,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:28:03,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:28:03,397 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 386 proven. 53 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-09-20 20:28:03,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:28:03,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132804416] [2022-09-20 20:28:03,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132804416] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 20:28:03,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126070682] [2022-09-20 20:28:03,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-09-20 20:28:03,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 20:28:03,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 20:28:03,399 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 20:28:03,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-09-20 20:28:03,476 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-09-20 20:28:03,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 20:28:03,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 22 conjunts are in the unsatisfiable core [2022-09-20 20:28:03,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 20:28:03,673 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 439 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-09-20 20:28:03,673 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-20 20:28:03,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126070682] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 20:28:03,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-09-20 20:28:03,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 25 [2022-09-20 20:28:03,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969810462] [2022-09-20 20:28:03,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 20:28:03,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-09-20 20:28:03,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:28:03,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-09-20 20:28:03,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2022-09-20 20:28:03,675 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 70 [2022-09-20 20:28:03,676 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 478 transitions, 8967 flow. Second operand has 23 states, 23 states have (on average 59.91304347826087) internal successors, (1378), 23 states have internal predecessors, (1378), 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) [2022-09-20 20:28:03,676 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:28:03,676 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 70 [2022-09-20 20:28:03,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:28:08,196 INFO L130 PetriNetUnfolder]: 2340/12790 cut-off events. [2022-09-20 20:28:08,197 INFO L131 PetriNetUnfolder]: For 1578415/1578605 co-relation queries the response was YES. [2022-09-20 20:28:08,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93355 conditions, 12790 events. 2340/12790 cut-off events. For 1578415/1578605 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 148543 event pairs, 554 based on Foata normal form. 41/11404 useless extension candidates. Maximal degree in co-relation 93203. Up to 2604 conditions per place. [2022-09-20 20:28:08,548 INFO L137 encePairwiseOnDemand]: 64/70 looper letters, 14 selfloop transitions, 41 changer transitions 339/531 dead transitions. [2022-09-20 20:28:08,548 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 531 transitions, 8638 flow [2022-09-20 20:28:08,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-09-20 20:28:08,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-09-20 20:28:08,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2000 transitions. [2022-09-20 20:28:08,551 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8658008658008658 [2022-09-20 20:28:08,552 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2000 transitions. [2022-09-20 20:28:08,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2000 transitions. [2022-09-20 20:28:08,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:28:08,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2000 transitions. [2022-09-20 20:28:08,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 60.60606060606061) internal successors, (2000), 33 states have internal predecessors, (2000), 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) [2022-09-20 20:28:08,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 70.0) internal successors, (2380), 34 states have internal predecessors, (2380), 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) [2022-09-20 20:28:08,559 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 70.0) internal successors, (2380), 34 states have internal predecessors, (2380), 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) [2022-09-20 20:28:08,559 INFO L175 Difference]: Start difference. First operand has 416 places, 478 transitions, 8967 flow. Second operand 33 states and 2000 transitions. [2022-09-20 20:28:08,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 531 transitions, 8638 flow [2022-09-20 20:28:11,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 531 transitions, 7808 flow, removed 278 selfloop flow, removed 34 redundant places. [2022-09-20 20:28:11,144 INFO L231 Difference]: Finished difference. Result has 405 places, 182 transitions, 1828 flow [2022-09-20 20:28:11,144 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=7422, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1828, PETRI_PLACES=405, PETRI_TRANSITIONS=182} [2022-09-20 20:28:11,145 INFO L287 CegarLoopForPetriNet]: 70 programPoint places, 335 predicate places. [2022-09-20 20:28:11,145 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 182 transitions, 1828 flow [2022-09-20 20:28:11,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.91304347826087) internal successors, (1378), 23 states have internal predecessors, (1378), 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) [2022-09-20 20:28:11,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:28:11,146 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 20:28:11,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-09-20 20:28:11,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-09-20 20:28:11,365 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 20:28:11,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:28:11,365 INFO L85 PathProgramCache]: Analyzing trace with hash -263501953, now seen corresponding path program 11 times [2022-09-20 20:28:11,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:28:11,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370993999] [2022-09-20 20:28:11,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:28:11,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:28:11,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:28:11,592 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 370 proven. 55 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-09-20 20:28:11,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:28:11,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370993999] [2022-09-20 20:28:11,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370993999] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 20:28:11,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622995295] [2022-09-20 20:28:11,592 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-09-20 20:28:11,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 20:28:11,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 20:28:11,594 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 20:28:11,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-09-20 20:28:11,679 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-09-20 20:28:11,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 20:28:11,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 22 conjunts are in the unsatisfiable core [2022-09-20 20:28:11,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 20:28:11,830 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 425 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-09-20 20:28:11,830 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-20 20:28:11,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622995295] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 20:28:11,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-09-20 20:28:11,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 25 [2022-09-20 20:28:11,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789200158] [2022-09-20 20:28:11,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 20:28:11,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-09-20 20:28:11,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:28:11,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-09-20 20:28:11,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2022-09-20 20:28:11,834 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 70 [2022-09-20 20:28:11,835 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 182 transitions, 1828 flow. Second operand has 23 states, 23 states have (on average 59.91304347826087) internal successors, (1378), 23 states have internal predecessors, (1378), 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) [2022-09-20 20:28:11,835 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:28:11,835 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 70 [2022-09-20 20:28:11,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:28:14,651 INFO L130 PetriNetUnfolder]: 3131/11785 cut-off events. [2022-09-20 20:28:14,652 INFO L131 PetriNetUnfolder]: For 1151274/1151561 co-relation queries the response was YES. [2022-09-20 20:28:14,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88695 conditions, 11785 events. 3131/11785 cut-off events. For 1151274/1151561 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 129022 event pairs, 680 based on Foata normal form. 35/10653 useless extension candidates. Maximal degree in co-relation 88553. Up to 2416 conditions per place. [2022-09-20 20:28:14,950 INFO L137 encePairwiseOnDemand]: 64/70 looper letters, 0 selfloop transitions, 0 changer transitions 221/221 dead transitions. [2022-09-20 20:28:14,951 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 221 transitions, 1864 flow [2022-09-20 20:28:14,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-09-20 20:28:14,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-09-20 20:28:14,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1969 transitions. [2022-09-20 20:28:14,953 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8523809523809524 [2022-09-20 20:28:14,953 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1969 transitions. [2022-09-20 20:28:14,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1969 transitions. [2022-09-20 20:28:14,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:28:14,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1969 transitions. [2022-09-20 20:28:14,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 59.666666666666664) internal successors, (1969), 33 states have internal predecessors, (1969), 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) [2022-09-20 20:28:14,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 70.0) internal successors, (2380), 34 states have internal predecessors, (2380), 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) [2022-09-20 20:28:14,959 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 70.0) internal successors, (2380), 34 states have internal predecessors, (2380), 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) [2022-09-20 20:28:14,959 INFO L175 Difference]: Start difference. First operand has 405 places, 182 transitions, 1828 flow. Second operand 33 states and 1969 transitions. [2022-09-20 20:28:14,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 221 transitions, 1864 flow [2022-09-20 20:28:16,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 221 transitions, 1417 flow, removed 100 selfloop flow, removed 77 redundant places. [2022-09-20 20:28:16,779 INFO L231 Difference]: Finished difference. Result has 287 places, 0 transitions, 0 flow [2022-09-20 20:28:16,779 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=1217, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=0, PETRI_PLACES=287, PETRI_TRANSITIONS=0} [2022-09-20 20:28:16,780 INFO L287 CegarLoopForPetriNet]: 70 programPoint places, 217 predicate places. [2022-09-20 20:28:16,780 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 0 transitions, 0 flow [2022-09-20 20:28:16,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.91304347826087) internal successors, (1378), 23 states have internal predecessors, (1378), 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) [2022-09-20 20:28:16,782 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-09-20 20:28:16,783 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2022-09-20 20:28:16,783 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2022-09-20 20:28:16,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-09-20 20:28:16,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 20:28:16,984 INFO L444 BasicCegarLoop]: Path program histogram: [11, 3, 2, 1, 1, 1] [2022-09-20 20:28:16,987 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-09-20 20:28:16,987 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-09-20 20:28:16,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 08:28:16 BasicIcfg [2022-09-20 20:28:16,991 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-09-20 20:28:16,992 INFO L158 Benchmark]: Toolchain (without parser) took 39543.05ms. Allocated memory was 176.2MB in the beginning and 3.4GB in the end (delta: 3.3GB). Free memory was 148.5MB in the beginning and 1.2GB in the end (delta: -1.0GB). Peak memory consumption was 2.2GB. Max. memory is 8.0GB. [2022-09-20 20:28:16,992 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 176.2MB. Free memory is still 135.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-09-20 20:28:16,992 INFO L158 Benchmark]: CACSL2BoogieTranslator took 367.57ms. Allocated memory was 176.2MB in the beginning and 233.8MB in the end (delta: 57.7MB). Free memory was 148.3MB in the beginning and 195.2MB in the end (delta: -46.9MB). Peak memory consumption was 10.8MB. Max. memory is 8.0GB. [2022-09-20 20:28:16,992 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.73ms. Allocated memory is still 233.8MB. Free memory was 195.2MB in the beginning and 193.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-09-20 20:28:16,993 INFO L158 Benchmark]: Boogie Preprocessor took 18.86ms. Allocated memory is still 233.8MB. Free memory was 193.1MB in the beginning and 192.0MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-09-20 20:28:16,993 INFO L158 Benchmark]: RCFGBuilder took 360.63ms. Allocated memory is still 233.8MB. Free memory was 191.5MB in the beginning and 179.9MB in the end (delta: 11.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-09-20 20:28:16,993 INFO L158 Benchmark]: TraceAbstraction took 38757.40ms. Allocated memory was 233.8MB in the beginning and 3.4GB in the end (delta: 3.2GB). Free memory was 179.4MB in the beginning and 1.2GB in the end (delta: -1.0GB). Peak memory consumption was 2.2GB. Max. memory is 8.0GB. [2022-09-20 20:28:16,994 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 176.2MB. Free memory is still 135.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 367.57ms. Allocated memory was 176.2MB in the beginning and 233.8MB in the end (delta: 57.7MB). Free memory was 148.3MB in the beginning and 195.2MB in the end (delta: -46.9MB). Peak memory consumption was 10.8MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 33.73ms. Allocated memory is still 233.8MB. Free memory was 195.2MB in the beginning and 193.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 18.86ms. Allocated memory is still 233.8MB. Free memory was 193.1MB in the beginning and 192.0MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 360.63ms. Allocated memory is still 233.8MB. Free memory was 191.5MB in the beginning and 179.9MB in the end (delta: 11.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 38757.40ms. Allocated memory was 233.8MB in the beginning and 3.4GB in the end (delta: 3.2GB). Free memory was 179.4MB in the beginning and 1.2GB in the end (delta: -1.0GB). Peak memory consumption was 2.2GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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, 88 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: 38.7s, OverallIterations: 19, TraceHistogramMax: 11, PathProgramHistogramMax: 11, EmptinessCheckTime: 0.0s, AutomataDifference: 26.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1019 SdHoareTripleChecker+Valid, 2.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1019 mSDsluCounter, 353 SdHoareTripleChecker+Invalid, 1.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 550 mSDsCounter, 1481 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2998 IncrementalHoareTripleChecker+Invalid, 4479 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1481 mSolverCounterUnsat, 100 mSDtfsCounter, 2998 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2817 GetRequests, 2030 SyntacticMatches, 64 SemanticMatches, 723 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11369 ImplicationChecksByTransitivity, 8.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=8967occurred in iteration=17, InterpolantAutomatonStates: 544, 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: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 8.0s InterpolantComputationTime, 2703 NumberOfCodeBlocks, 2694 NumberOfCodeBlocksAsserted, 76 NumberOfCheckSat, 3597 ConstructedInterpolants, 0 QuantifiedInterpolants, 14135 SizeOfPredicates, 163 NumberOfNonLiveVariables, 2630 ConjunctsInSsa, 217 ConjunctsInUnsatCore, 41 InterpolantComputations, 9 PerfectInterpolantSequences, 1784/7028 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! [2022-09-20 20:28:17,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...