/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/weaver/popl20-nonblocking-cntr.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-?-0612a5f-m [2022-09-20 21:30:01,488 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-09-20 21:30:01,490 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-09-20 21:30:01,515 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-09-20 21:30:01,516 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-09-20 21:30:01,517 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-09-20 21:30:01,518 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-09-20 21:30:01,519 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-09-20 21:30:01,521 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-09-20 21:30:01,522 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-09-20 21:30:01,522 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-09-20 21:30:01,523 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-09-20 21:30:01,524 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-09-20 21:30:01,525 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-09-20 21:30:01,525 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-09-20 21:30:01,526 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-09-20 21:30:01,527 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-09-20 21:30:01,528 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-09-20 21:30:01,529 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-09-20 21:30:01,531 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-09-20 21:30:01,532 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-09-20 21:30:01,535 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-09-20 21:30:01,536 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-09-20 21:30:01,537 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-09-20 21:30:01,539 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-09-20 21:30:01,542 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-09-20 21:30:01,543 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-09-20 21:30:01,543 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-09-20 21:30:01,544 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-09-20 21:30:01,545 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-09-20 21:30:01,545 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-09-20 21:30:01,545 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-09-20 21:30:01,546 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-09-20 21:30:01,546 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-09-20 21:30:01,547 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-09-20 21:30:01,555 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-09-20 21:30:01,560 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 21:30:01,581 INFO L113 SettingsManager]: Loading preferences was successful [2022-09-20 21:30:01,582 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-09-20 21:30:01,582 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-09-20 21:30:01,582 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-09-20 21:30:01,583 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-09-20 21:30:01,583 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-09-20 21:30:01,583 INFO L138 SettingsManager]: * Use SBE=true [2022-09-20 21:30:01,583 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-09-20 21:30:01,583 INFO L138 SettingsManager]: * sizeof long=4 [2022-09-20 21:30:01,584 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-09-20 21:30:01,584 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-09-20 21:30:01,584 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-09-20 21:30:01,584 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-09-20 21:30:01,584 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-09-20 21:30:01,584 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-09-20 21:30:01,584 INFO L138 SettingsManager]: * sizeof long double=12 [2022-09-20 21:30:01,584 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-09-20 21:30:01,584 INFO L138 SettingsManager]: * Use constant arrays=true [2022-09-20 21:30:01,585 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-09-20 21:30:01,585 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-09-20 21:30:01,585 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-09-20 21:30:01,585 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-09-20 21:30:01,585 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-09-20 21:30:01,585 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-20 21:30:01,585 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-09-20 21:30:01,586 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-09-20 21:30:01,586 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-09-20 21:30:01,586 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-09-20 21:30:01,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-09-20 21:30:01,586 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-09-20 21:30:01,586 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-09-20 21:30:01,586 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-09-20 21:30:01,821 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-09-20 21:30:01,841 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-09-20 21:30:01,843 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-09-20 21:30:01,844 INFO L271 PluginConnector]: Initializing CDTParser... [2022-09-20 21:30:01,846 INFO L275 PluginConnector]: CDTParser initialized [2022-09-20 21:30:01,847 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c [2022-09-20 21:30:01,907 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2f89350e/ad9b84c5c7bb4925820f35a7c3e131a8/FLAG26513d756 [2022-09-20 21:30:02,235 INFO L306 CDTParser]: Found 1 translation units. [2022-09-20 21:30:02,236 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c [2022-09-20 21:30:02,242 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2f89350e/ad9b84c5c7bb4925820f35a7c3e131a8/FLAG26513d756 [2022-09-20 21:30:02,652 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2f89350e/ad9b84c5c7bb4925820f35a7c3e131a8 [2022-09-20 21:30:02,654 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-09-20 21:30:02,656 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-09-20 21:30:02,657 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-09-20 21:30:02,657 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-09-20 21:30:02,659 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-09-20 21:30:02,660 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 09:30:02" (1/1) ... [2022-09-20 21:30:02,661 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59bb71aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:30:02, skipping insertion in model container [2022-09-20 21:30:02,661 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 09:30:02" (1/1) ... [2022-09-20 21:30:02,687 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-09-20 21:30:02,702 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-09-20 21:30:02,911 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c[2037,2050] [2022-09-20 21:30:02,914 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-09-20 21:30:02,922 INFO L203 MainTranslator]: Completed pre-run [2022-09-20 21:30:02,950 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c[2037,2050] [2022-09-20 21:30:02,955 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-09-20 21:30:02,967 INFO L208 MainTranslator]: Completed translation [2022-09-20 21:30:02,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:30:02 WrapperNode [2022-09-20 21:30:02,969 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-09-20 21:30:02,971 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-09-20 21:30:02,971 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-09-20 21:30:02,971 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-09-20 21:30:02,978 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:30:02" (1/1) ... [2022-09-20 21:30:02,986 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:30:02" (1/1) ... [2022-09-20 21:30:03,002 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 53 [2022-09-20 21:30:03,003 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-09-20 21:30:03,003 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-09-20 21:30:03,003 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-09-20 21:30:03,004 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-09-20 21:30:03,011 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:30:02" (1/1) ... [2022-09-20 21:30:03,011 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:30:02" (1/1) ... [2022-09-20 21:30:03,013 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:30:02" (1/1) ... [2022-09-20 21:30:03,013 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:30:02" (1/1) ... [2022-09-20 21:30:03,017 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:30:02" (1/1) ... [2022-09-20 21:30:03,020 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:30:02" (1/1) ... [2022-09-20 21:30:03,021 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:30:02" (1/1) ... [2022-09-20 21:30:03,023 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-09-20 21:30:03,024 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-09-20 21:30:03,024 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-09-20 21:30:03,024 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-09-20 21:30:03,025 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:30:02" (1/1) ... [2022-09-20 21:30:03,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-20 21:30:03,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:30:03,056 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 21:30:03,058 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 21:30:03,090 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-09-20 21:30:03,091 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-09-20 21:30:03,091 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-09-20 21:30:03,091 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-09-20 21:30:03,091 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-09-20 21:30:03,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-09-20 21:30:03,091 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-09-20 21:30:03,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-09-20 21:30:03,091 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-09-20 21:30:03,091 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-09-20 21:30:03,091 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-09-20 21:30:03,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-09-20 21:30:03,092 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-09-20 21:30:03,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-09-20 21:30:03,093 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 21:30:03,152 INFO L234 CfgBuilder]: Building ICFG [2022-09-20 21:30:03,153 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-09-20 21:30:03,283 INFO L275 CfgBuilder]: Performing block encoding [2022-09-20 21:30:03,317 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-09-20 21:30:03,318 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-09-20 21:30:03,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 09:30:03 BoogieIcfgContainer [2022-09-20 21:30:03,320 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-09-20 21:30:03,322 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-09-20 21:30:03,322 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-09-20 21:30:03,325 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-09-20 21:30:03,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 09:30:02" (1/3) ... [2022-09-20 21:30:03,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59978990 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 09:30:03, skipping insertion in model container [2022-09-20 21:30:03,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 09:30:02" (2/3) ... [2022-09-20 21:30:03,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59978990 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 09:30:03, skipping insertion in model container [2022-09-20 21:30:03,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 09:30:03" (3/3) ... [2022-09-20 21:30:03,327 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr.wvr.c [2022-09-20 21:30:03,342 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-09-20 21:30:03,343 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-09-20 21:30:03,343 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-09-20 21:30:03,424 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-09-20 21:30:03,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 82 transitions, 180 flow [2022-09-20 21:30:03,563 INFO L130 PetriNetUnfolder]: 6/80 cut-off events. [2022-09-20 21:30:03,563 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-09-20 21:30:03,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 80 events. 6/80 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 43 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2022-09-20 21:30:03,566 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 82 transitions, 180 flow [2022-09-20 21:30:03,574 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 71 transitions, 154 flow [2022-09-20 21:30:03,593 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-09-20 21:30:03,602 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;@3f1c37ff, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-09-20 21:30:03,602 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-09-20 21:30:03,634 INFO L130 PetriNetUnfolder]: 6/70 cut-off events. [2022-09-20 21:30:03,635 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-09-20 21:30:03,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:30:03,636 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:30:03,637 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 21:30:03,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:30:03,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1621300256, now seen corresponding path program 1 times [2022-09-20 21:30:03,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:30:03,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883967431] [2022-09-20 21:30:03,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:30:03,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:30:03,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:30:03,866 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 21:30:03,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:30:03,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883967431] [2022-09-20 21:30:03,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883967431] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:30:03,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 21:30:03,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-09-20 21:30:03,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346440660] [2022-09-20 21:30:03,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:30:03,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-09-20 21:30:03,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:30:03,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-09-20 21:30:03,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-09-20 21:30:03,930 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 82 [2022-09-20 21:30:03,933 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 71 transitions, 154 flow. Second operand has 2 states, 2 states have (on average 73.5) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 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 21:30:03,933 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:30:03,933 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 82 [2022-09-20 21:30:03,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:30:03,995 INFO L130 PetriNetUnfolder]: 10/93 cut-off events. [2022-09-20 21:30:03,995 INFO L131 PetriNetUnfolder]: For 18/19 co-relation queries the response was YES. [2022-09-20 21:30:03,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125 conditions, 93 events. 10/93 cut-off events. For 18/19 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 105 event pairs, 1 based on Foata normal form. 11/94 useless extension candidates. Maximal degree in co-relation 55. Up to 18 conditions per place. [2022-09-20 21:30:03,998 INFO L137 encePairwiseOnDemand]: 78/82 looper letters, 6 selfloop transitions, 0 changer transitions 2/67 dead transitions. [2022-09-20 21:30:03,998 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 67 transitions, 158 flow [2022-09-20 21:30:04,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-09-20 21:30:04,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-09-20 21:30:04,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 152 transitions. [2022-09-20 21:30:04,013 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.926829268292683 [2022-09-20 21:30:04,014 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 152 transitions. [2022-09-20 21:30:04,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 152 transitions. [2022-09-20 21:30:04,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:30:04,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 152 transitions. [2022-09-20 21:30:04,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 76.0) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 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 21:30:04,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 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 21:30:04,025 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 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 21:30:04,026 INFO L175 Difference]: Start difference. First operand has 72 places, 71 transitions, 154 flow. Second operand 2 states and 152 transitions. [2022-09-20 21:30:04,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 67 transitions, 158 flow [2022-09-20 21:30:04,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 67 transitions, 150 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-09-20 21:30:04,039 INFO L231 Difference]: Finished difference. Result has 69 places, 65 transitions, 134 flow [2022-09-20 21:30:04,041 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=134, PETRI_PLACES=69, PETRI_TRANSITIONS=65} [2022-09-20 21:30:04,044 INFO L287 CegarLoopForPetriNet]: 72 programPoint places, -3 predicate places. [2022-09-20 21:30:04,045 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 65 transitions, 134 flow [2022-09-20 21:30:04,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 73.5) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 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 21:30:04,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:30:04,045 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:30:04,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-09-20 21:30:04,045 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 21:30:04,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:30:04,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1829195169, now seen corresponding path program 1 times [2022-09-20 21:30:04,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:30:04,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697407039] [2022-09-20 21:30:04,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:30:04,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:30:04,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:30:04,310 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 21:30:04,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:30:04,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697407039] [2022-09-20 21:30:04,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697407039] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:30:04,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 21:30:04,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-09-20 21:30:04,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061345496] [2022-09-20 21:30:04,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:30:04,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-09-20 21:30:04,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:30:04,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-09-20 21:30:04,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-09-20 21:30:04,315 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 82 [2022-09-20 21:30:04,316 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 65 transitions, 134 flow. Second operand has 6 states, 6 states have (on average 54.833333333333336) internal successors, (329), 6 states have internal predecessors, (329), 0 states have call successors, (0), 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 21:30:04,316 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:30:04,316 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 82 [2022-09-20 21:30:04,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:30:04,401 INFO L130 PetriNetUnfolder]: 64/183 cut-off events. [2022-09-20 21:30:04,401 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-09-20 21:30:04,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325 conditions, 183 events. 64/183 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 541 event pairs, 25 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 322. Up to 80 conditions per place. [2022-09-20 21:30:04,404 INFO L137 encePairwiseOnDemand]: 76/82 looper letters, 26 selfloop transitions, 5 changer transitions 0/73 dead transitions. [2022-09-20 21:30:04,404 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 73 transitions, 213 flow [2022-09-20 21:30:04,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-09-20 21:30:04,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-09-20 21:30:04,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 344 transitions. [2022-09-20 21:30:04,407 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6991869918699187 [2022-09-20 21:30:04,408 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 344 transitions. [2022-09-20 21:30:04,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 344 transitions. [2022-09-20 21:30:04,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:30:04,409 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 344 transitions. [2022-09-20 21:30:04,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 57.333333333333336) internal successors, (344), 6 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:30:04,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 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 21:30:04,414 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 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 21:30:04,414 INFO L175 Difference]: Start difference. First operand has 69 places, 65 transitions, 134 flow. Second operand 6 states and 344 transitions. [2022-09-20 21:30:04,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 73 transitions, 213 flow [2022-09-20 21:30:04,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 73 transitions, 213 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-09-20 21:30:04,417 INFO L231 Difference]: Finished difference. Result has 73 places, 66 transitions, 152 flow [2022-09-20 21:30:04,417 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=152, PETRI_PLACES=73, PETRI_TRANSITIONS=66} [2022-09-20 21:30:04,418 INFO L287 CegarLoopForPetriNet]: 72 programPoint places, 1 predicate places. [2022-09-20 21:30:04,418 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 66 transitions, 152 flow [2022-09-20 21:30:04,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.833333333333336) internal successors, (329), 6 states have internal predecessors, (329), 0 states have call successors, (0), 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 21:30:04,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:30:04,419 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:30:04,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-09-20 21:30:04,419 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 21:30:04,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:30:04,420 INFO L85 PathProgramCache]: Analyzing trace with hash 346200639, now seen corresponding path program 1 times [2022-09-20 21:30:04,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:30:04,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716844372] [2022-09-20 21:30:04,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:30:04,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:30:04,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:30:04,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:30:04,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:30:04,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716844372] [2022-09-20 21:30:04,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716844372] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:30:04,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 21:30:04,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-09-20 21:30:04,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344113852] [2022-09-20 21:30:04,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:30:04,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-09-20 21:30:04,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:30:04,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-09-20 21:30:04,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-09-20 21:30:04,547 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 82 [2022-09-20 21:30:04,547 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 66 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 63.0) internal successors, (315), 5 states have internal predecessors, (315), 0 states have call successors, (0), 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 21:30:04,547 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:30:04,548 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 82 [2022-09-20 21:30:04,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:30:04,658 INFO L130 PetriNetUnfolder]: 87/283 cut-off events. [2022-09-20 21:30:04,658 INFO L131 PetriNetUnfolder]: For 52/52 co-relation queries the response was YES. [2022-09-20 21:30:04,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 522 conditions, 283 events. 87/283 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1081 event pairs, 37 based on Foata normal form. 1/256 useless extension candidates. Maximal degree in co-relation 517. Up to 113 conditions per place. [2022-09-20 21:30:04,662 INFO L137 encePairwiseOnDemand]: 75/82 looper letters, 32 selfloop transitions, 5 changer transitions 1/86 dead transitions. [2022-09-20 21:30:04,662 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 86 transitions, 291 flow [2022-09-20 21:30:04,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-09-20 21:30:04,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-09-20 21:30:04,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 396 transitions. [2022-09-20 21:30:04,672 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8048780487804879 [2022-09-20 21:30:04,672 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 396 transitions. [2022-09-20 21:30:04,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 396 transitions. [2022-09-20 21:30:04,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:30:04,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 396 transitions. [2022-09-20 21:30:04,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 66.0) internal successors, (396), 6 states have internal predecessors, (396), 0 states have call successors, (0), 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 21:30:04,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 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 21:30:04,678 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 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 21:30:04,678 INFO L175 Difference]: Start difference. First operand has 73 places, 66 transitions, 152 flow. Second operand 6 states and 396 transitions. [2022-09-20 21:30:04,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 86 transitions, 291 flow [2022-09-20 21:30:04,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 86 transitions, 279 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-09-20 21:30:04,682 INFO L231 Difference]: Finished difference. Result has 77 places, 68 transitions, 170 flow [2022-09-20 21:30:04,682 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=170, PETRI_PLACES=77, PETRI_TRANSITIONS=68} [2022-09-20 21:30:04,683 INFO L287 CegarLoopForPetriNet]: 72 programPoint places, 5 predicate places. [2022-09-20 21:30:04,683 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 68 transitions, 170 flow [2022-09-20 21:30:04,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 63.0) internal successors, (315), 5 states have internal predecessors, (315), 0 states have call successors, (0), 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 21:30:04,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:30:04,684 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:30:04,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-09-20 21:30:04,684 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 21:30:04,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:30:04,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1801956563, now seen corresponding path program 2 times [2022-09-20 21:30:04,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:30:04,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216427475] [2022-09-20 21:30:04,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:30:04,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:30:04,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:30:04,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:30:04,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:30:04,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216427475] [2022-09-20 21:30:04,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216427475] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:30:04,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003603622] [2022-09-20 21:30:04,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-09-20 21:30:04,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:30:04,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:30:04,771 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 21:30:04,773 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 21:30:04,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-09-20 21:30:04,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:30:04,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 7 conjunts are in the unsatisfiable core [2022-09-20 21:30:04,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:30:05,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 21:30:05,045 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-20 21:30:05,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003603622] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 21:30:05,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-09-20 21:30:05,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2022-09-20 21:30:05,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678760907] [2022-09-20 21:30:05,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 21:30:05,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-09-20 21:30:05,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:30:05,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-09-20 21:30:05,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-09-20 21:30:05,048 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 82 [2022-09-20 21:30:05,049 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 68 transitions, 170 flow. Second operand has 6 states, 6 states have (on average 57.166666666666664) internal successors, (343), 6 states have internal predecessors, (343), 0 states have call successors, (0), 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 21:30:05,049 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:30:05,049 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 82 [2022-09-20 21:30:05,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:30:05,178 INFO L130 PetriNetUnfolder]: 44/166 cut-off events. [2022-09-20 21:30:05,178 INFO L131 PetriNetUnfolder]: For 50/56 co-relation queries the response was YES. [2022-09-20 21:30:05,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 346 conditions, 166 events. 44/166 cut-off events. For 50/56 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 521 event pairs, 23 based on Foata normal form. 13/174 useless extension candidates. Maximal degree in co-relation 338. Up to 66 conditions per place. [2022-09-20 21:30:05,181 INFO L137 encePairwiseOnDemand]: 74/82 looper letters, 20 selfloop transitions, 7 changer transitions 0/72 dead transitions. [2022-09-20 21:30:05,181 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 72 transitions, 233 flow [2022-09-20 21:30:05,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-09-20 21:30:05,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-09-20 21:30:05,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 460 transitions. [2022-09-20 21:30:05,183 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7012195121951219 [2022-09-20 21:30:05,183 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 460 transitions. [2022-09-20 21:30:05,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 460 transitions. [2022-09-20 21:30:05,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:30:05,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 460 transitions. [2022-09-20 21:30:05,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 57.5) internal successors, (460), 8 states have internal predecessors, (460), 0 states have call successors, (0), 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 21:30:05,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 82.0) internal successors, (738), 9 states have internal predecessors, (738), 0 states have call successors, (0), 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 21:30:05,188 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 82.0) internal successors, (738), 9 states have internal predecessors, (738), 0 states have call successors, (0), 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 21:30:05,188 INFO L175 Difference]: Start difference. First operand has 77 places, 68 transitions, 170 flow. Second operand 8 states and 460 transitions. [2022-09-20 21:30:05,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 72 transitions, 233 flow [2022-09-20 21:30:05,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 72 transitions, 221 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-09-20 21:30:05,191 INFO L231 Difference]: Finished difference. Result has 78 places, 67 transitions, 168 flow [2022-09-20 21:30:05,192 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=168, PETRI_PLACES=78, PETRI_TRANSITIONS=67} [2022-09-20 21:30:05,192 INFO L287 CegarLoopForPetriNet]: 72 programPoint places, 6 predicate places. [2022-09-20 21:30:05,192 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 67 transitions, 168 flow [2022-09-20 21:30:05,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 57.166666666666664) internal successors, (343), 6 states have internal predecessors, (343), 0 states have call successors, (0), 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 21:30:05,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:30:05,193 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, 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 21:30:05,223 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-09-20 21:30:05,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:30:05,420 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 21:30:05,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:30:05,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1175529915, now seen corresponding path program 1 times [2022-09-20 21:30:05,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:30:05,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886042329] [2022-09-20 21:30:05,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:30:05,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:30:05,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:30:05,557 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 21:30:05,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:30:05,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886042329] [2022-09-20 21:30:05,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886042329] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:30:05,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980732798] [2022-09-20 21:30:05,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:30:05,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:30:05,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:30:05,560 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 21:30:05,561 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 21:30:05,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:30:05,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 10 conjunts are in the unsatisfiable core [2022-09-20 21:30:05,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:30:05,912 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 21:30:05,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:30:06,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:30:06,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980732798] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:30:06,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:30:06,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 8 [2022-09-20 21:30:06,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060388666] [2022-09-20 21:30:06,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:30:06,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-09-20 21:30:06,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:30:06,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-09-20 21:30:06,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-09-20 21:30:06,317 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 82 [2022-09-20 21:30:06,319 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 67 transitions, 168 flow. Second operand has 8 states, 8 states have (on average 63.125) internal successors, (505), 8 states have internal predecessors, (505), 0 states have call successors, (0), 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 21:30:06,319 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:30:06,319 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 82 [2022-09-20 21:30:06,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:30:06,401 INFO L130 PetriNetUnfolder]: 17/162 cut-off events. [2022-09-20 21:30:06,401 INFO L131 PetriNetUnfolder]: For 38/44 co-relation queries the response was YES. [2022-09-20 21:30:06,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 162 events. 17/162 cut-off events. For 38/44 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 422 event pairs, 1 based on Foata normal form. 4/164 useless extension candidates. Maximal degree in co-relation 266. Up to 21 conditions per place. [2022-09-20 21:30:06,403 INFO L137 encePairwiseOnDemand]: 76/82 looper letters, 25 selfloop transitions, 5 changer transitions 5/86 dead transitions. [2022-09-20 21:30:06,403 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 86 transitions, 302 flow [2022-09-20 21:30:06,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-09-20 21:30:06,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-09-20 21:30:06,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 393 transitions. [2022-09-20 21:30:06,405 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7987804878048781 [2022-09-20 21:30:06,405 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 393 transitions. [2022-09-20 21:30:06,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 393 transitions. [2022-09-20 21:30:06,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:30:06,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 393 transitions. [2022-09-20 21:30:06,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 65.5) internal successors, (393), 6 states have internal predecessors, (393), 0 states have call successors, (0), 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 21:30:06,408 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 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 21:30:06,408 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 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 21:30:06,408 INFO L175 Difference]: Start difference. First operand has 78 places, 67 transitions, 168 flow. Second operand 6 states and 393 transitions. [2022-09-20 21:30:06,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 86 transitions, 302 flow [2022-09-20 21:30:06,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 86 transitions, 279 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-09-20 21:30:06,413 INFO L231 Difference]: Finished difference. Result has 81 places, 71 transitions, 197 flow [2022-09-20 21:30:06,414 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=197, PETRI_PLACES=81, PETRI_TRANSITIONS=71} [2022-09-20 21:30:06,417 INFO L287 CegarLoopForPetriNet]: 72 programPoint places, 9 predicate places. [2022-09-20 21:30:06,417 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 71 transitions, 197 flow [2022-09-20 21:30:06,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 63.125) internal successors, (505), 8 states have internal predecessors, (505), 0 states have call successors, (0), 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 21:30:06,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:30:06,418 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, 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 21:30:06,446 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 21:30:06,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:30:06,625 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 21:30:06,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:30:06,625 INFO L85 PathProgramCache]: Analyzing trace with hash 935055537, now seen corresponding path program 2 times [2022-09-20 21:30:06,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:30:06,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085094208] [2022-09-20 21:30:06,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:30:06,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:30:06,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:30:06,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 21:30:06,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:30:06,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085094208] [2022-09-20 21:30:06,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085094208] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:30:06,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056577854] [2022-09-20 21:30:06,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-09-20 21:30:06,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:30:06,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:30:06,689 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 21:30:06,690 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 21:30:06,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-09-20 21:30:06,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:30:06,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2022-09-20 21:30:06,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:30:06,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 21:30:06,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:30:06,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 21:30:06,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056577854] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:30:06,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:30:06,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 10 [2022-09-20 21:30:06,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560123477] [2022-09-20 21:30:06,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:30:06,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-09-20 21:30:06,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:30:06,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-09-20 21:30:06,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-09-20 21:30:07,000 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 82 [2022-09-20 21:30:07,001 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 71 transitions, 197 flow. Second operand has 10 states, 10 states have (on average 64.2) internal successors, (642), 10 states have internal predecessors, (642), 0 states have call successors, (0), 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 21:30:07,001 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:30:07,001 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 82 [2022-09-20 21:30:07,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:30:07,134 INFO L130 PetriNetUnfolder]: 109/370 cut-off events. [2022-09-20 21:30:07,134 INFO L131 PetriNetUnfolder]: For 199/209 co-relation queries the response was YES. [2022-09-20 21:30:07,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 829 conditions, 370 events. 109/370 cut-off events. For 199/209 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1748 event pairs, 24 based on Foata normal form. 15/376 useless extension candidates. Maximal degree in co-relation 819. Up to 124 conditions per place. [2022-09-20 21:30:07,137 INFO L137 encePairwiseOnDemand]: 76/82 looper letters, 34 selfloop transitions, 15 changer transitions 0/99 dead transitions. [2022-09-20 21:30:07,137 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 99 transitions, 414 flow [2022-09-20 21:30:07,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-09-20 21:30:07,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-09-20 21:30:07,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 466 transitions. [2022-09-20 21:30:07,140 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8118466898954704 [2022-09-20 21:30:07,140 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 466 transitions. [2022-09-20 21:30:07,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 466 transitions. [2022-09-20 21:30:07,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:30:07,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 466 transitions. [2022-09-20 21:30:07,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 66.57142857142857) internal successors, (466), 7 states have internal predecessors, (466), 0 states have call successors, (0), 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 21:30:07,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 82.0) internal successors, (656), 8 states have internal predecessors, (656), 0 states have call successors, (0), 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 21:30:07,143 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 82.0) internal successors, (656), 8 states have internal predecessors, (656), 0 states have call successors, (0), 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 21:30:07,143 INFO L175 Difference]: Start difference. First operand has 81 places, 71 transitions, 197 flow. Second operand 7 states and 466 transitions. [2022-09-20 21:30:07,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 99 transitions, 414 flow [2022-09-20 21:30:07,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 99 transitions, 410 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-09-20 21:30:07,146 INFO L231 Difference]: Finished difference. Result has 88 places, 84 transitions, 338 flow [2022-09-20 21:30:07,147 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=338, PETRI_PLACES=88, PETRI_TRANSITIONS=84} [2022-09-20 21:30:07,147 INFO L287 CegarLoopForPetriNet]: 72 programPoint places, 16 predicate places. [2022-09-20 21:30:07,148 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 84 transitions, 338 flow [2022-09-20 21:30:07,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 64.2) internal successors, (642), 10 states have internal predecessors, (642), 0 states have call successors, (0), 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 21:30:07,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:30:07,148 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:30:07,178 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 21:30:07,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:30:07,367 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 21:30:07,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:30:07,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1891359299, now seen corresponding path program 3 times [2022-09-20 21:30:07,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:30:07,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411959186] [2022-09-20 21:30:07,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:30:07,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:30:07,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:30:07,528 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:30:07,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:30:07,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411959186] [2022-09-20 21:30:07,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411959186] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:30:07,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616183919] [2022-09-20 21:30:07,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-09-20 21:30:07,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:30:07,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:30:07,534 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 21:30:07,535 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 21:30:07,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-09-20 21:30:07,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:30:07,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-09-20 21:30:07,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:30:07,711 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:30:07,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:30:07,856 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:30:07,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616183919] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:30:07,856 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:30:07,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 9] total 20 [2022-09-20 21:30:07,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664333855] [2022-09-20 21:30:07,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:30:07,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-09-20 21:30:07,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:30:07,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-09-20 21:30:07,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-09-20 21:30:07,860 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-09-20 21:30:07,861 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 84 transitions, 338 flow. Second operand has 20 states, 20 states have (on average 59.85) internal successors, (1197), 20 states have internal predecessors, (1197), 0 states have call successors, (0), 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 21:30:07,861 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:30:07,861 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-09-20 21:30:07,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:30:09,174 INFO L130 PetriNetUnfolder]: 312/859 cut-off events. [2022-09-20 21:30:09,175 INFO L131 PetriNetUnfolder]: For 1295/1295 co-relation queries the response was YES. [2022-09-20 21:30:09,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2543 conditions, 859 events. 312/859 cut-off events. For 1295/1295 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 4686 event pairs, 14 based on Foata normal form. 29/887 useless extension candidates. Maximal degree in co-relation 2530. Up to 168 conditions per place. [2022-09-20 21:30:09,183 INFO L137 encePairwiseOnDemand]: 69/82 looper letters, 117 selfloop transitions, 134 changer transitions 11/307 dead transitions. [2022-09-20 21:30:09,183 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 307 transitions, 1960 flow [2022-09-20 21:30:09,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-09-20 21:30:09,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2022-09-20 21:30:09,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 3368 transitions. [2022-09-20 21:30:09,193 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7467849223946785 [2022-09-20 21:30:09,193 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 3368 transitions. [2022-09-20 21:30:09,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 3368 transitions. [2022-09-20 21:30:09,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:30:09,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 3368 transitions. [2022-09-20 21:30:09,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 61.236363636363635) internal successors, (3368), 55 states have internal predecessors, (3368), 0 states have call successors, (0), 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 21:30:09,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 82.0) internal successors, (4592), 56 states have internal predecessors, (4592), 0 states have call successors, (0), 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 21:30:09,215 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 82.0) internal successors, (4592), 56 states have internal predecessors, (4592), 0 states have call successors, (0), 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 21:30:09,215 INFO L175 Difference]: Start difference. First operand has 88 places, 84 transitions, 338 flow. Second operand 55 states and 3368 transitions. [2022-09-20 21:30:09,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 307 transitions, 1960 flow [2022-09-20 21:30:09,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 307 transitions, 1952 flow, removed 4 selfloop flow, removed 0 redundant places. [2022-09-20 21:30:09,232 INFO L231 Difference]: Finished difference. Result has 154 places, 206 transitions, 1422 flow [2022-09-20 21:30:09,232 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=1422, PETRI_PLACES=154, PETRI_TRANSITIONS=206} [2022-09-20 21:30:09,233 INFO L287 CegarLoopForPetriNet]: 72 programPoint places, 82 predicate places. [2022-09-20 21:30:09,233 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 206 transitions, 1422 flow [2022-09-20 21:30:09,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 59.85) internal successors, (1197), 20 states have internal predecessors, (1197), 0 states have call successors, (0), 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 21:30:09,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:30:09,234 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:30:09,258 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 21:30:09,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:30:09,458 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 21:30:09,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:30:09,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1408127925, now seen corresponding path program 4 times [2022-09-20 21:30:09,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:30:09,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775685671] [2022-09-20 21:30:09,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:30:09,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:30:09,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:30:09,600 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:30:09,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:30:09,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775685671] [2022-09-20 21:30:09,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775685671] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:30:09,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387547283] [2022-09-20 21:30:09,603 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-09-20 21:30:09,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:30:09,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:30:09,605 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 21:30:09,612 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 21:30:09,664 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-09-20 21:30:09,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:30:09,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2022-09-20 21:30:09,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:30:09,895 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:30:09,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:30:10,083 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:30:10,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387547283] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:30:10,084 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:30:10,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 26 [2022-09-20 21:30:10,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777130789] [2022-09-20 21:30:10,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:30:10,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-09-20 21:30:10,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:30:10,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-09-20 21:30:10,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2022-09-20 21:30:10,089 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-09-20 21:30:10,091 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 206 transitions, 1422 flow. Second operand has 26 states, 26 states have (on average 59.61538461538461) internal successors, (1550), 26 states have internal predecessors, (1550), 0 states have call successors, (0), 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 21:30:10,091 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:30:10,091 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-09-20 21:30:10,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:30:11,739 INFO L130 PetriNetUnfolder]: 789/2290 cut-off events. [2022-09-20 21:30:11,740 INFO L131 PetriNetUnfolder]: For 7916/7916 co-relation queries the response was YES. [2022-09-20 21:30:11,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8790 conditions, 2290 events. 789/2290 cut-off events. For 7916/7916 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 17294 event pairs, 54 based on Foata normal form. 124/2406 useless extension candidates. Maximal degree in co-relation 8764. Up to 444 conditions per place. [2022-09-20 21:30:11,771 INFO L137 encePairwiseOnDemand]: 70/82 looper letters, 312 selfloop transitions, 334 changer transitions 21/712 dead transitions. [2022-09-20 21:30:11,771 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 712 transitions, 6678 flow [2022-09-20 21:30:11,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-09-20 21:30:11,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-09-20 21:30:11,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3772 transitions. [2022-09-20 21:30:11,780 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7540983606557377 [2022-09-20 21:30:11,780 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 3772 transitions. [2022-09-20 21:30:11,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 3772 transitions. [2022-09-20 21:30:11,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:30:11,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 3772 transitions. [2022-09-20 21:30:11,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 61.83606557377049) internal successors, (3772), 61 states have internal predecessors, (3772), 0 states have call successors, (0), 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 21:30:11,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 82.0) internal successors, (5084), 62 states have internal predecessors, (5084), 0 states have call successors, (0), 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 21:30:11,809 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 82.0) internal successors, (5084), 62 states have internal predecessors, (5084), 0 states have call successors, (0), 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 21:30:11,809 INFO L175 Difference]: Start difference. First operand has 154 places, 206 transitions, 1422 flow. Second operand 61 states and 3772 transitions. [2022-09-20 21:30:11,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 712 transitions, 6678 flow [2022-09-20 21:30:11,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 712 transitions, 6187 flow, removed 216 selfloop flow, removed 6 redundant places. [2022-09-20 21:30:11,863 INFO L231 Difference]: Finished difference. Result has 238 places, 492 transitions, 4915 flow [2022-09-20 21:30:11,864 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1256, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=4915, PETRI_PLACES=238, PETRI_TRANSITIONS=492} [2022-09-20 21:30:11,865 INFO L287 CegarLoopForPetriNet]: 72 programPoint places, 166 predicate places. [2022-09-20 21:30:11,866 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 492 transitions, 4915 flow [2022-09-20 21:30:11,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 59.61538461538461) internal successors, (1550), 26 states have internal predecessors, (1550), 0 states have call successors, (0), 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 21:30:11,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:30:11,866 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:30:11,892 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 21:30:12,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:30:12,082 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 21:30:12,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:30:12,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1242560893, now seen corresponding path program 5 times [2022-09-20 21:30:12,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:30:12,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703046436] [2022-09-20 21:30:12,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:30:12,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:30:12,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:30:12,210 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:30:12,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:30:12,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703046436] [2022-09-20 21:30:12,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703046436] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:30:12,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628499893] [2022-09-20 21:30:12,210 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-09-20 21:30:12,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:30:12,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:30:12,212 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 21:30:12,241 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 21:30:12,275 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-09-20 21:30:12,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:30:12,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2022-09-20 21:30:12,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:30:12,450 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:30:12,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:30:12,600 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:30:12,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628499893] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:30:12,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:30:12,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 25 [2022-09-20 21:30:12,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498464734] [2022-09-20 21:30:12,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:30:12,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-09-20 21:30:12,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:30:12,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-09-20 21:30:12,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2022-09-20 21:30:12,604 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-09-20 21:30:12,605 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 492 transitions, 4915 flow. Second operand has 25 states, 25 states have (on average 59.68) internal successors, (1492), 25 states have internal predecessors, (1492), 0 states have call successors, (0), 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 21:30:12,605 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:30:12,606 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-09-20 21:30:12,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:30:14,004 INFO L130 PetriNetUnfolder]: 962/2730 cut-off events. [2022-09-20 21:30:14,005 INFO L131 PetriNetUnfolder]: For 23272/23272 co-relation queries the response was YES. [2022-09-20 21:30:14,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14528 conditions, 2730 events. 962/2730 cut-off events. For 23272/23272 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 21703 event pairs, 19 based on Foata normal form. 33/2753 useless extension candidates. Maximal degree in co-relation 14474. Up to 512 conditions per place. [2022-09-20 21:30:14,048 INFO L137 encePairwiseOnDemand]: 70/82 looper letters, 183 selfloop transitions, 511 changer transitions 7/746 dead transitions. [2022-09-20 21:30:14,048 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 746 transitions, 9027 flow [2022-09-20 21:30:14,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-09-20 21:30:14,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-09-20 21:30:14,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2387 transitions. [2022-09-20 21:30:14,052 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7464040025015635 [2022-09-20 21:30:14,052 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2387 transitions. [2022-09-20 21:30:14,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2387 transitions. [2022-09-20 21:30:14,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:30:14,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2387 transitions. [2022-09-20 21:30:14,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 61.205128205128204) internal successors, (2387), 39 states have internal predecessors, (2387), 0 states have call successors, (0), 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 21:30:14,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 82.0) internal successors, (3280), 40 states have internal predecessors, (3280), 0 states have call successors, (0), 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 21:30:14,063 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 82.0) internal successors, (3280), 40 states have internal predecessors, (3280), 0 states have call successors, (0), 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 21:30:14,063 INFO L175 Difference]: Start difference. First operand has 238 places, 492 transitions, 4915 flow. Second operand 39 states and 2387 transitions. [2022-09-20 21:30:14,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 746 transitions, 9027 flow [2022-09-20 21:30:14,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 746 transitions, 8707 flow, removed 157 selfloop flow, removed 3 redundant places. [2022-09-20 21:30:14,293 INFO L231 Difference]: Finished difference. Result has 287 places, 646 transitions, 8206 flow [2022-09-20 21:30:14,294 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=4737, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=359, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=8206, PETRI_PLACES=287, PETRI_TRANSITIONS=646} [2022-09-20 21:30:14,294 INFO L287 CegarLoopForPetriNet]: 72 programPoint places, 215 predicate places. [2022-09-20 21:30:14,294 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 646 transitions, 8206 flow [2022-09-20 21:30:14,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 59.68) internal successors, (1492), 25 states have internal predecessors, (1492), 0 states have call successors, (0), 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 21:30:14,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:30:14,295 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:30:14,322 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 21:30:14,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:30:14,512 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 21:30:14,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:30:14,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1269435027, now seen corresponding path program 6 times [2022-09-20 21:30:14,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:30:14,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340134884] [2022-09-20 21:30:14,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:30:14,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:30:14,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:30:14,634 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:30:14,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:30:14,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340134884] [2022-09-20 21:30:14,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340134884] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:30:14,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724337082] [2022-09-20 21:30:14,635 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-09-20 21:30:14,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:30:14,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:30:14,637 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 21:30:14,639 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 21:30:14,697 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-09-20 21:30:14,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:30:14,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-09-20 21:30:14,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:30:14,813 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:30:14,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:30:14,949 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:30:14,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724337082] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:30:14,950 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:30:14,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2022-09-20 21:30:14,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154860815] [2022-09-20 21:30:14,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:30:14,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-09-20 21:30:14,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:30:14,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-09-20 21:30:14,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2022-09-20 21:30:14,954 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-09-20 21:30:14,956 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 646 transitions, 8206 flow. Second operand has 22 states, 22 states have (on average 59.45454545454545) internal successors, (1308), 22 states have internal predecessors, (1308), 0 states have call successors, (0), 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 21:30:14,956 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:30:14,956 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-09-20 21:30:14,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:30:17,491 INFO L130 PetriNetUnfolder]: 1247/3669 cut-off events. [2022-09-20 21:30:17,491 INFO L131 PetriNetUnfolder]: For 47008/47008 co-relation queries the response was YES. [2022-09-20 21:30:17,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22549 conditions, 3669 events. 1247/3669 cut-off events. For 47008/47008 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 31669 event pairs, 57 based on Foata normal form. 38/3675 useless extension candidates. Maximal degree in co-relation 22481. Up to 626 conditions per place. [2022-09-20 21:30:17,568 INFO L137 encePairwiseOnDemand]: 70/82 looper letters, 256 selfloop transitions, 795 changer transitions 9/1105 dead transitions. [2022-09-20 21:30:17,568 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 1105 transitions, 16324 flow [2022-09-20 21:30:17,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-09-20 21:30:17,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2022-09-20 21:30:17,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 4397 transitions. [2022-09-20 21:30:17,581 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7447493224932249 [2022-09-20 21:30:17,582 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 4397 transitions. [2022-09-20 21:30:17,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 4397 transitions. [2022-09-20 21:30:17,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:30:17,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 4397 transitions. [2022-09-20 21:30:17,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 61.06944444444444) internal successors, (4397), 72 states have internal predecessors, (4397), 0 states have call successors, (0), 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 21:30:17,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 82.0) internal successors, (5986), 73 states have internal predecessors, (5986), 0 states have call successors, (0), 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 21:30:17,619 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 82.0) internal successors, (5986), 73 states have internal predecessors, (5986), 0 states have call successors, (0), 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 21:30:17,619 INFO L175 Difference]: Start difference. First operand has 287 places, 646 transitions, 8206 flow. Second operand 72 states and 4397 transitions. [2022-09-20 21:30:17,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 1105 transitions, 16324 flow [2022-09-20 21:30:17,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 1105 transitions, 15317 flow, removed 156 selfloop flow, removed 19 redundant places. [2022-09-20 21:30:17,896 INFO L231 Difference]: Finished difference. Result has 369 places, 944 transitions, 14092 flow [2022-09-20 21:30:17,896 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=7528, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=510, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=14092, PETRI_PLACES=369, PETRI_TRANSITIONS=944} [2022-09-20 21:30:17,897 INFO L287 CegarLoopForPetriNet]: 72 programPoint places, 297 predicate places. [2022-09-20 21:30:17,897 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 944 transitions, 14092 flow [2022-09-20 21:30:17,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 59.45454545454545) internal successors, (1308), 22 states have internal predecessors, (1308), 0 states have call successors, (0), 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 21:30:17,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:30:17,898 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:30:17,917 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 21:30:18,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:30:18,099 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 21:30:18,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:30:18,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1154924529, now seen corresponding path program 7 times [2022-09-20 21:30:18,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:30:18,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101769050] [2022-09-20 21:30:18,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:30:18,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:30:18,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:30:18,200 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:30:18,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:30:18,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101769050] [2022-09-20 21:30:18,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101769050] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:30:18,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682158732] [2022-09-20 21:30:18,201 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-09-20 21:30:18,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:30:18,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:30:18,202 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 21:30:18,230 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 21:30:18,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:30:18,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-09-20 21:30:18,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:30:18,433 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:30:18,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:30:18,613 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:30:18,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682158732] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:30:18,614 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:30:18,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2022-09-20 21:30:18,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498155205] [2022-09-20 21:30:18,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:30:18,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-09-20 21:30:18,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:30:18,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-09-20 21:30:18,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2022-09-20 21:30:18,616 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-09-20 21:30:18,617 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 944 transitions, 14092 flow. Second operand has 22 states, 22 states have (on average 59.40909090909091) internal successors, (1307), 22 states have internal predecessors, (1307), 0 states have call successors, (0), 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 21:30:18,617 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:30:18,617 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-09-20 21:30:18,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:30:20,636 INFO L130 PetriNetUnfolder]: 1335/4010 cut-off events. [2022-09-20 21:30:20,636 INFO L131 PetriNetUnfolder]: For 67203/67203 co-relation queries the response was YES. [2022-09-20 21:30:20,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27448 conditions, 4010 events. 1335/4010 cut-off events. For 67203/67203 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 35691 event pairs, 28 based on Foata normal form. 2/4002 useless extension candidates. Maximal degree in co-relation 27354. Up to 674 conditions per place. [2022-09-20 21:30:20,695 INFO L137 encePairwiseOnDemand]: 70/82 looper letters, 381 selfloop transitions, 755 changer transitions 35/1216 dead transitions. [2022-09-20 21:30:20,695 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 1216 transitions, 21058 flow [2022-09-20 21:30:20,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-09-20 21:30:20,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-09-20 21:30:20,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2515 transitions. [2022-09-20 21:30:20,707 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7480666270077335 [2022-09-20 21:30:20,707 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2515 transitions. [2022-09-20 21:30:20,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2515 transitions. [2022-09-20 21:30:20,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:30:20,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2515 transitions. [2022-09-20 21:30:20,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 61.34146341463415) internal successors, (2515), 41 states have internal predecessors, (2515), 0 states have call successors, (0), 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 21:30:20,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 82.0) internal successors, (3444), 42 states have internal predecessors, (3444), 0 states have call successors, (0), 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 21:30:20,719 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 82.0) internal successors, (3444), 42 states have internal predecessors, (3444), 0 states have call successors, (0), 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 21:30:20,719 INFO L175 Difference]: Start difference. First operand has 369 places, 944 transitions, 14092 flow. Second operand 41 states and 2515 transitions. [2022-09-20 21:30:20,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 1216 transitions, 21058 flow [2022-09-20 21:30:21,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 1216 transitions, 20592 flow, removed 170 selfloop flow, removed 21 redundant places. [2022-09-20 21:30:21,241 INFO L231 Difference]: Finished difference. Result has 396 places, 1064 transitions, 17958 flow [2022-09-20 21:30:21,242 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=13600, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=936, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=633, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=17958, PETRI_PLACES=396, PETRI_TRANSITIONS=1064} [2022-09-20 21:30:21,243 INFO L287 CegarLoopForPetriNet]: 72 programPoint places, 324 predicate places. [2022-09-20 21:30:21,243 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 1064 transitions, 17958 flow [2022-09-20 21:30:21,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 59.40909090909091) internal successors, (1307), 22 states have internal predecessors, (1307), 0 states have call successors, (0), 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 21:30:21,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:30:21,243 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:30:21,261 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 21:30:21,450 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,SelfDestructingSolverStorable10 [2022-09-20 21:30:21,451 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 21:30:21,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:30:21,451 INFO L85 PathProgramCache]: Analyzing trace with hash -588062631, now seen corresponding path program 8 times [2022-09-20 21:30:21,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:30:21,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481508403] [2022-09-20 21:30:21,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:30:21,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:30:21,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:30:21,552 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:30:21,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:30:21,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481508403] [2022-09-20 21:30:21,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481508403] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:30:21,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523065817] [2022-09-20 21:30:21,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-09-20 21:30:21,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:30:21,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:30:21,554 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 21:30:21,554 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 21:30:21,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-09-20 21:30:21,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:30:21,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-09-20 21:30:21,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:30:21,819 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:30:21,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:30:22,013 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:30:22,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523065817] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:30:22,014 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:30:22,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-09-20 21:30:22,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407929016] [2022-09-20 21:30:22,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:30:22,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-09-20 21:30:22,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:30:22,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-09-20 21:30:22,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2022-09-20 21:30:22,018 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-09-20 21:30:22,020 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 1064 transitions, 17958 flow. Second operand has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 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 21:30:22,020 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:30:22,020 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-09-20 21:30:22,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:30:23,557 INFO L130 PetriNetUnfolder]: 1306/3863 cut-off events. [2022-09-20 21:30:23,557 INFO L131 PetriNetUnfolder]: For 65840/65840 co-relation queries the response was YES. [2022-09-20 21:30:23,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28441 conditions, 3863 events. 1306/3863 cut-off events. For 65840/65840 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 33845 event pairs, 125 based on Foata normal form. 1/3802 useless extension candidates. Maximal degree in co-relation 28344. Up to 655 conditions per place. [2022-09-20 21:30:23,625 INFO L137 encePairwiseOnDemand]: 71/82 looper letters, 467 selfloop transitions, 618 changer transitions 12/1142 dead transitions. [2022-09-20 21:30:23,625 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 1142 transitions, 21266 flow [2022-09-20 21:30:23,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-09-20 21:30:23,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-09-20 21:30:23,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1296 transitions. [2022-09-20 21:30:23,628 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7526132404181185 [2022-09-20 21:30:23,628 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1296 transitions. [2022-09-20 21:30:23,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1296 transitions. [2022-09-20 21:30:23,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:30:23,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1296 transitions. [2022-09-20 21:30:23,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 61.714285714285715) internal successors, (1296), 21 states have internal predecessors, (1296), 0 states have call successors, (0), 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 21:30:23,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 82.0) internal successors, (1804), 22 states have internal predecessors, (1804), 0 states have call successors, (0), 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 21:30:23,632 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 82.0) internal successors, (1804), 22 states have internal predecessors, (1804), 0 states have call successors, (0), 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 21:30:23,633 INFO L175 Difference]: Start difference. First operand has 396 places, 1064 transitions, 17958 flow. Second operand 21 states and 1296 transitions. [2022-09-20 21:30:23,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 1142 transitions, 21266 flow [2022-09-20 21:30:24,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 1142 transitions, 20505 flow, removed 95 selfloop flow, removed 20 redundant places. [2022-09-20 21:30:24,369 INFO L231 Difference]: Finished difference. Result has 398 places, 1081 transitions, 18737 flow [2022-09-20 21:30:24,370 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=17233, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1064, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=601, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=18737, PETRI_PLACES=398, PETRI_TRANSITIONS=1081} [2022-09-20 21:30:24,371 INFO L287 CegarLoopForPetriNet]: 72 programPoint places, 326 predicate places. [2022-09-20 21:30:24,371 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 1081 transitions, 18737 flow [2022-09-20 21:30:24,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 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 21:30:24,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:30:24,371 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:30:24,388 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 21:30:24,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:30:24,572 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 21:30:24,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:30:24,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1260651241, now seen corresponding path program 9 times [2022-09-20 21:30:24,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:30:24,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049712299] [2022-09-20 21:30:24,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:30:24,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:30:24,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:30:24,651 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:30:24,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:30:24,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049712299] [2022-09-20 21:30:24,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049712299] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:30:24,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823526936] [2022-09-20 21:30:24,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-09-20 21:30:24,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:30:24,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:30:24,653 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 21:30:24,654 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 21:30:24,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-09-20 21:30:24,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:30:24,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-09-20 21:30:24,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:30:24,820 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:30:24,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:30:24,927 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:30:24,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823526936] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:30:24,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:30:24,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2022-09-20 21:30:24,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646257605] [2022-09-20 21:30:24,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:30:24,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-09-20 21:30:24,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:30:24,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-09-20 21:30:24,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-09-20 21:30:24,930 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-09-20 21:30:24,931 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 1081 transitions, 18737 flow. Second operand has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 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 21:30:24,931 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:30:24,931 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-09-20 21:30:24,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:30:27,808 INFO L130 PetriNetUnfolder]: 1753/5165 cut-off events. [2022-09-20 21:30:27,809 INFO L131 PetriNetUnfolder]: For 92340/92340 co-relation queries the response was YES. [2022-09-20 21:30:27,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38676 conditions, 5165 events. 1753/5165 cut-off events. For 92340/92340 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 48220 event pairs, 70 based on Foata normal form. 43/5173 useless extension candidates. Maximal degree in co-relation 38577. Up to 927 conditions per place. [2022-09-20 21:30:27,885 INFO L137 encePairwiseOnDemand]: 70/82 looper letters, 339 selfloop transitions, 1251 changer transitions 3/1638 dead transitions. [2022-09-20 21:30:27,885 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 1638 transitions, 31405 flow [2022-09-20 21:30:27,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-09-20 21:30:27,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2022-09-20 21:30:27,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 3837 transitions. [2022-09-20 21:30:27,889 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7427409988385598 [2022-09-20 21:30:27,889 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 3837 transitions. [2022-09-20 21:30:27,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 3837 transitions. [2022-09-20 21:30:27,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:30:27,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 3837 transitions. [2022-09-20 21:30:27,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 60.904761904761905) internal successors, (3837), 63 states have internal predecessors, (3837), 0 states have call successors, (0), 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 21:30:27,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 82.0) internal successors, (5248), 64 states have internal predecessors, (5248), 0 states have call successors, (0), 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 21:30:27,901 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 82.0) internal successors, (5248), 64 states have internal predecessors, (5248), 0 states have call successors, (0), 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 21:30:27,901 INFO L175 Difference]: Start difference. First operand has 398 places, 1081 transitions, 18737 flow. Second operand 63 states and 3837 transitions. [2022-09-20 21:30:27,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 1638 transitions, 31405 flow [2022-09-20 21:30:28,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 1638 transitions, 30349 flow, removed 13 selfloop flow, removed 11 redundant places. [2022-09-20 21:30:28,660 INFO L231 Difference]: Finished difference. Result has 468 places, 1493 transitions, 29791 flow [2022-09-20 21:30:28,662 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=17993, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1081, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=848, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=29791, PETRI_PLACES=468, PETRI_TRANSITIONS=1493} [2022-09-20 21:30:28,662 INFO L287 CegarLoopForPetriNet]: 72 programPoint places, 396 predicate places. [2022-09-20 21:30:28,662 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 1493 transitions, 29791 flow [2022-09-20 21:30:28,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 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 21:30:28,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:30:28,663 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:30:28,684 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 21:30:28,870 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,SelfDestructingSolverStorable12 [2022-09-20 21:30:28,871 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 21:30:28,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:30:28,871 INFO L85 PathProgramCache]: Analyzing trace with hash -611324017, now seen corresponding path program 10 times [2022-09-20 21:30:28,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:30:28,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648212992] [2022-09-20 21:30:28,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:30:28,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:30:28,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:30:28,963 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:30:28,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:30:28,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648212992] [2022-09-20 21:30:28,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648212992] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:30:28,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301111711] [2022-09-20 21:30:28,964 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-09-20 21:30:28,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:30:28,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:30:28,966 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 21:30:28,967 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 21:30:29,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-09-20 21:30:29,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:30:29,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 9 conjunts are in the unsatisfiable core [2022-09-20 21:30:29,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:30:29,184 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:30:29,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:30:29,420 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:30:29,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301111711] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:30:29,421 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:30:29,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2022-09-20 21:30:29,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521155464] [2022-09-20 21:30:29,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:30:29,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-09-20 21:30:29,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:30:29,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-09-20 21:30:29,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2022-09-20 21:30:29,424 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-09-20 21:30:29,425 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 1493 transitions, 29791 flow. Second operand has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 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 21:30:29,425 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:30:29,425 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-09-20 21:30:29,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:30:32,470 INFO L130 PetriNetUnfolder]: 1765/5268 cut-off events. [2022-09-20 21:30:32,470 INFO L131 PetriNetUnfolder]: For 119802/119802 co-relation queries the response was YES. [2022-09-20 21:30:32,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43665 conditions, 5268 events. 1765/5268 cut-off events. For 119802/119802 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 49767 event pairs, 88 based on Foata normal form. 4/5229 useless extension candidates. Maximal degree in co-relation 43547. Up to 900 conditions per place. [2022-09-20 21:30:32,559 INFO L137 encePairwiseOnDemand]: 70/82 looper letters, 539 selfloop transitions, 1047 changer transitions 16/1647 dead transitions. [2022-09-20 21:30:32,559 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 1647 transitions, 35637 flow [2022-09-20 21:30:32,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-09-20 21:30:32,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-09-20 21:30:32,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2525 transitions. [2022-09-20 21:30:32,562 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7510410469958358 [2022-09-20 21:30:32,562 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2525 transitions. [2022-09-20 21:30:32,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2525 transitions. [2022-09-20 21:30:32,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:30:32,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2525 transitions. [2022-09-20 21:30:32,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 61.58536585365854) internal successors, (2525), 41 states have internal predecessors, (2525), 0 states have call successors, (0), 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 21:30:32,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 82.0) internal successors, (3444), 42 states have internal predecessors, (3444), 0 states have call successors, (0), 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 21:30:32,570 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 82.0) internal successors, (3444), 42 states have internal predecessors, (3444), 0 states have call successors, (0), 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 21:30:32,571 INFO L175 Difference]: Start difference. First operand has 468 places, 1493 transitions, 29791 flow. Second operand 41 states and 2525 transitions. [2022-09-20 21:30:32,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 1647 transitions, 35637 flow [2022-09-20 21:30:33,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 1647 transitions, 34840 flow, removed 132 selfloop flow, removed 31 redundant places. [2022-09-20 21:30:33,772 INFO L231 Difference]: Finished difference. Result has 484 places, 1527 transitions, 32213 flow [2022-09-20 21:30:33,774 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=28994, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1012, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=32213, PETRI_PLACES=484, PETRI_TRANSITIONS=1527} [2022-09-20 21:30:33,774 INFO L287 CegarLoopForPetriNet]: 72 programPoint places, 412 predicate places. [2022-09-20 21:30:33,774 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 1527 transitions, 32213 flow [2022-09-20 21:30:33,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 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 21:30:33,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:30:33,775 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:30:33,791 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 21:30:33,975 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,SelfDestructingSolverStorable13 [2022-09-20 21:30:33,976 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 21:30:33,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:30:33,976 INFO L85 PathProgramCache]: Analyzing trace with hash 2101670421, now seen corresponding path program 11 times [2022-09-20 21:30:33,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:30:33,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747763933] [2022-09-20 21:30:33,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:30:33,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:30:33,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:30:34,069 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:30:34,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:30:34,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747763933] [2022-09-20 21:30:34,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747763933] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:30:34,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200273301] [2022-09-20 21:30:34,070 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-09-20 21:30:34,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:30:34,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:30:34,072 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 21:30:34,073 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 21:30:34,127 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-09-20 21:30:34,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:30:34,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 7 conjunts are in the unsatisfiable core [2022-09-20 21:30:34,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:30:34,203 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:30:34,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:30:34,289 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:30:34,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200273301] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:30:34,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:30:34,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-09-20 21:30:34,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439112652] [2022-09-20 21:30:34,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:30:34,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-09-20 21:30:34,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:30:34,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-09-20 21:30:34,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-09-20 21:30:34,291 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-09-20 21:30:34,292 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 1527 transitions, 32213 flow. Second operand has 20 states, 20 states have (on average 59.35) internal successors, (1187), 20 states have internal predecessors, (1187), 0 states have call successors, (0), 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 21:30:34,292 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:30:34,293 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-09-20 21:30:34,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:30:38,437 INFO L130 PetriNetUnfolder]: 2376/7435 cut-off events. [2022-09-20 21:30:38,437 INFO L131 PetriNetUnfolder]: For 183826/183826 co-relation queries the response was YES. [2022-09-20 21:30:38,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62975 conditions, 7435 events. 2376/7435 cut-off events. For 183826/183826 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 76444 event pairs, 116 based on Foata normal form. 13/7406 useless extension candidates. Maximal degree in co-relation 62851. Up to 1787 conditions per place. [2022-09-20 21:30:38,572 INFO L137 encePairwiseOnDemand]: 70/82 looper letters, 1289 selfloop transitions, 875 changer transitions 26/2235 dead transitions. [2022-09-20 21:30:38,573 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 2235 transitions, 51483 flow [2022-09-20 21:30:38,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-09-20 21:30:38,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-09-20 21:30:38,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2898 transitions. [2022-09-20 21:30:38,575 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7519460300985988 [2022-09-20 21:30:38,576 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2898 transitions. [2022-09-20 21:30:38,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2898 transitions. [2022-09-20 21:30:38,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:30:38,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2898 transitions. [2022-09-20 21:30:38,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 61.659574468085104) internal successors, (2898), 47 states have internal predecessors, (2898), 0 states have call successors, (0), 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 21:30:38,585 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 82.0) internal successors, (3936), 48 states have internal predecessors, (3936), 0 states have call successors, (0), 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 21:30:38,586 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 82.0) internal successors, (3936), 48 states have internal predecessors, (3936), 0 states have call successors, (0), 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 21:30:38,586 INFO L175 Difference]: Start difference. First operand has 484 places, 1527 transitions, 32213 flow. Second operand 47 states and 2898 transitions. [2022-09-20 21:30:38,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 2235 transitions, 51483 flow [2022-09-20 21:30:40,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 2235 transitions, 49701 flow, removed 141 selfloop flow, removed 25 redundant places. [2022-09-20 21:30:40,693 INFO L231 Difference]: Finished difference. Result has 523 places, 1887 transitions, 41923 flow [2022-09-20 21:30:40,695 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=30833, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=575, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=867, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=41923, PETRI_PLACES=523, PETRI_TRANSITIONS=1887} [2022-09-20 21:30:40,696 INFO L287 CegarLoopForPetriNet]: 72 programPoint places, 451 predicate places. [2022-09-20 21:30:40,696 INFO L495 AbstractCegarLoop]: Abstraction has has 523 places, 1887 transitions, 41923 flow [2022-09-20 21:30:40,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 59.35) internal successors, (1187), 20 states have internal predecessors, (1187), 0 states have call successors, (0), 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 21:30:40,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:30:40,697 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:30:40,724 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 21:30:40,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-09-20 21:30:40,910 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 21:30:40,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:30:40,910 INFO L85 PathProgramCache]: Analyzing trace with hash -432017137, now seen corresponding path program 12 times [2022-09-20 21:30:40,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:30:40,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828935350] [2022-09-20 21:30:40,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:30:40,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:30:40,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:30:40,998 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:30:40,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:30:40,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828935350] [2022-09-20 21:30:40,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828935350] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:30:40,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727139579] [2022-09-20 21:30:40,999 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-09-20 21:30:40,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:30:40,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:30:41,000 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:30:41,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-09-20 21:30:41,061 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-09-20 21:30:41,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:30:41,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-09-20 21:30:41,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:30:41,204 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:30:41,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:30:41,362 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:30:41,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727139579] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:30:41,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:30:41,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-09-20 21:30:41,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129578482] [2022-09-20 21:30:41,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:30:41,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-09-20 21:30:41,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:30:41,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-09-20 21:30:41,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2022-09-20 21:30:41,366 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-09-20 21:30:41,367 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 523 places, 1887 transitions, 41923 flow. Second operand has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 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 21:30:41,367 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:30:41,367 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-09-20 21:30:41,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:30:45,782 INFO L130 PetriNetUnfolder]: 2378/7361 cut-off events. [2022-09-20 21:30:45,783 INFO L131 PetriNetUnfolder]: For 212343/212343 co-relation queries the response was YES. [2022-09-20 21:30:45,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66281 conditions, 7361 events. 2378/7361 cut-off events. For 212343/212343 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 75298 event pairs, 127 based on Foata normal form. 1/7337 useless extension candidates. Maximal degree in co-relation 66139. Up to 3427 conditions per place. [2022-09-20 21:30:46,018 INFO L137 encePairwiseOnDemand]: 70/82 looper letters, 1510 selfloop transitions, 372 changer transitions 8/1935 dead transitions. [2022-09-20 21:30:46,018 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 1935 transitions, 46556 flow [2022-09-20 21:30:46,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-09-20 21:30:46,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-09-20 21:30:46,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1100 transitions. [2022-09-20 21:30:46,020 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7452574525745257 [2022-09-20 21:30:46,020 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1100 transitions. [2022-09-20 21:30:46,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1100 transitions. [2022-09-20 21:30:46,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:30:46,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1100 transitions. [2022-09-20 21:30:46,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 61.111111111111114) internal successors, (1100), 18 states have internal predecessors, (1100), 0 states have call successors, (0), 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 21:30:46,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 82.0) internal successors, (1558), 19 states have internal predecessors, (1558), 0 states have call successors, (0), 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 21:30:46,024 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 82.0) internal successors, (1558), 19 states have internal predecessors, (1558), 0 states have call successors, (0), 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 21:30:46,025 INFO L175 Difference]: Start difference. First operand has 523 places, 1887 transitions, 41923 flow. Second operand 18 states and 1100 transitions. [2022-09-20 21:30:46,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 537 places, 1935 transitions, 46556 flow [2022-09-20 21:30:48,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 1935 transitions, 45441 flow, removed 376 selfloop flow, removed 13 redundant places. [2022-09-20 21:30:48,639 INFO L231 Difference]: Finished difference. Result has 530 places, 1898 transitions, 42255 flow [2022-09-20 21:30:48,641 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=40822, PETRI_DIFFERENCE_MINUEND_PLACES=507, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1887, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=361, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=42255, PETRI_PLACES=530, PETRI_TRANSITIONS=1898} [2022-09-20 21:30:48,641 INFO L287 CegarLoopForPetriNet]: 72 programPoint places, 458 predicate places. [2022-09-20 21:30:48,641 INFO L495 AbstractCegarLoop]: Abstraction has has 530 places, 1898 transitions, 42255 flow [2022-09-20 21:30:48,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 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 21:30:48,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:30:48,642 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:30:48,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-09-20 21:30:48,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-09-20 21:30:48,866 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 21:30:48,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:30:48,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1107215807, now seen corresponding path program 13 times [2022-09-20 21:30:48,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:30:48,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48537596] [2022-09-20 21:30:48,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:30:48,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:30:48,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:30:48,956 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:30:48,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:30:48,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48537596] [2022-09-20 21:30:48,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48537596] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:30:48,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940067588] [2022-09-20 21:30:48,957 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-09-20 21:30:48,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:30:48,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:30:48,960 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:30:48,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-09-20 21:30:49,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:30:49,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-09-20 21:30:49,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:30:49,170 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:30:49,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:30:49,293 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:30:49,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940067588] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:30:49,293 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:30:49,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2022-09-20 21:30:49,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329557711] [2022-09-20 21:30:49,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:30:49,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-09-20 21:30:49,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:30:49,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-09-20 21:30:49,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2022-09-20 21:30:49,295 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-09-20 21:30:49,296 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 530 places, 1898 transitions, 42255 flow. Second operand has 23 states, 23 states have (on average 59.52173913043478) internal successors, (1369), 23 states have internal predecessors, (1369), 0 states have call successors, (0), 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 21:30:49,296 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:30:49,296 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-09-20 21:30:49,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:30:54,732 INFO L130 PetriNetUnfolder]: 2664/8374 cut-off events. [2022-09-20 21:30:54,732 INFO L131 PetriNetUnfolder]: For 252846/252846 co-relation queries the response was YES. [2022-09-20 21:30:54,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75353 conditions, 8374 events. 2664/8374 cut-off events. For 252846/252846 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 87816 event pairs, 141 based on Foata normal form. 71/8395 useless extension candidates. Maximal degree in co-relation 75206. Up to 1482 conditions per place. [2022-09-20 21:30:54,943 INFO L137 encePairwiseOnDemand]: 70/82 looper letters, 782 selfloop transitions, 1577 changer transitions 4/2408 dead transitions. [2022-09-20 21:30:54,944 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 580 places, 2408 transitions, 58081 flow [2022-09-20 21:30:54,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-09-20 21:30:54,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2022-09-20 21:30:54,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 3624 transitions. [2022-09-20 21:30:54,947 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7490698635799917 [2022-09-20 21:30:54,947 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 3624 transitions. [2022-09-20 21:30:54,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 3624 transitions. [2022-09-20 21:30:54,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:30:54,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 3624 transitions. [2022-09-20 21:30:54,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 61.42372881355932) internal successors, (3624), 59 states have internal predecessors, (3624), 0 states have call successors, (0), 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 21:30:54,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 82.0) internal successors, (4920), 60 states have internal predecessors, (4920), 0 states have call successors, (0), 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 21:30:54,959 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 82.0) internal successors, (4920), 60 states have internal predecessors, (4920), 0 states have call successors, (0), 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 21:30:54,959 INFO L175 Difference]: Start difference. First operand has 530 places, 1898 transitions, 42255 flow. Second operand 59 states and 3624 transitions. [2022-09-20 21:30:54,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 580 places, 2408 transitions, 58081 flow [2022-09-20 21:30:58,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 568 places, 2408 transitions, 57816 flow, removed 42 selfloop flow, removed 12 redundant places. [2022-09-20 21:30:58,397 INFO L231 Difference]: Finished difference. Result has 588 places, 2216 transitions, 55280 flow [2022-09-20 21:30:58,399 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=41752, PETRI_DIFFERENCE_MINUEND_PLACES=510, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1881, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1281, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=55280, PETRI_PLACES=588, PETRI_TRANSITIONS=2216} [2022-09-20 21:30:58,399 INFO L287 CegarLoopForPetriNet]: 72 programPoint places, 516 predicate places. [2022-09-20 21:30:58,400 INFO L495 AbstractCegarLoop]: Abstraction has has 588 places, 2216 transitions, 55280 flow [2022-09-20 21:30:58,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.52173913043478) internal successors, (1369), 23 states have internal predecessors, (1369), 0 states have call successors, (0), 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 21:30:58,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:30:58,400 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:30:58,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-09-20 21:30:58,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:30:58,623 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 21:30:58,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:30:58,624 INFO L85 PathProgramCache]: Analyzing trace with hash -773126277, now seen corresponding path program 14 times [2022-09-20 21:30:58,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:30:58,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716810864] [2022-09-20 21:30:58,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:30:58,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:30:58,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:30:58,754 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:30:58,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:30:58,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716810864] [2022-09-20 21:30:58,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716810864] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:30:58,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3742715] [2022-09-20 21:30:58,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-09-20 21:30:58,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:30:58,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:30:58,756 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:30:58,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-09-20 21:30:58,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-09-20 21:30:58,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:30:58,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2022-09-20 21:30:58,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:30:59,034 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:30:59,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:30:59,177 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:30:59,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3742715] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:30:59,177 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:30:59,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 26 [2022-09-20 21:30:59,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237282023] [2022-09-20 21:30:59,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:30:59,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-09-20 21:30:59,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:30:59,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-09-20 21:30:59,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2022-09-20 21:30:59,179 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-09-20 21:30:59,180 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 588 places, 2216 transitions, 55280 flow. Second operand has 26 states, 26 states have (on average 59.61538461538461) internal successors, (1550), 26 states have internal predecessors, (1550), 0 states have call successors, (0), 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 21:30:59,180 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:30:59,180 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-09-20 21:30:59,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:31:06,191 INFO L130 PetriNetUnfolder]: 2988/9291 cut-off events. [2022-09-20 21:31:06,192 INFO L131 PetriNetUnfolder]: For 345490/345490 co-relation queries the response was YES. [2022-09-20 21:31:06,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92178 conditions, 9291 events. 2988/9291 cut-off events. For 345490/345490 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 98854 event pairs, 173 based on Foata normal form. 151/9401 useless extension candidates. Maximal degree in co-relation 92015. Up to 3203 conditions per place. [2022-09-20 21:31:06,442 INFO L137 encePairwiseOnDemand]: 70/82 looper letters, 1193 selfloop transitions, 1454 changer transitions 5/2697 dead transitions. [2022-09-20 21:31:06,442 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 620 places, 2697 transitions, 72483 flow [2022-09-20 21:31:06,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-09-20 21:31:06,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-09-20 21:31:06,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2072 transitions. [2022-09-20 21:31:06,444 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7657058388765706 [2022-09-20 21:31:06,445 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2072 transitions. [2022-09-20 21:31:06,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2072 transitions. [2022-09-20 21:31:06,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:31:06,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2072 transitions. [2022-09-20 21:31:06,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 62.78787878787879) internal successors, (2072), 33 states have internal predecessors, (2072), 0 states have call successors, (0), 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 21:31:06,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 82.0) internal successors, (2788), 34 states have internal predecessors, (2788), 0 states have call successors, (0), 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 21:31:06,451 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 82.0) internal successors, (2788), 34 states have internal predecessors, (2788), 0 states have call successors, (0), 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 21:31:06,451 INFO L175 Difference]: Start difference. First operand has 588 places, 2216 transitions, 55280 flow. Second operand 33 states and 2072 transitions. [2022-09-20 21:31:06,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 620 places, 2697 transitions, 72483 flow [2022-09-20 21:31:10,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 596 places, 2697 transitions, 71968 flow, removed 141 selfloop flow, removed 24 redundant places. [2022-09-20 21:31:11,038 INFO L231 Difference]: Finished difference. Result has 620 places, 2470 transitions, 67545 flow [2022-09-20 21:31:11,040 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=54777, PETRI_DIFFERENCE_MINUEND_PLACES=564, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=931, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=67545, PETRI_PLACES=620, PETRI_TRANSITIONS=2470} [2022-09-20 21:31:11,040 INFO L287 CegarLoopForPetriNet]: 72 programPoint places, 548 predicate places. [2022-09-20 21:31:11,040 INFO L495 AbstractCegarLoop]: Abstraction has has 620 places, 2470 transitions, 67545 flow [2022-09-20 21:31:11,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 59.61538461538461) internal successors, (1550), 26 states have internal predecessors, (1550), 0 states have call successors, (0), 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 21:31:11,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:31:11,041 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:31:11,057 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-09-20 21:31:11,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-09-20 21:31:11,241 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 21:31:11,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:31:11,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1371417741, now seen corresponding path program 15 times [2022-09-20 21:31:11,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:31:11,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470422086] [2022-09-20 21:31:11,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:31:11,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:31:11,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:31:11,324 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:31:11,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:31:11,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470422086] [2022-09-20 21:31:11,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470422086] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:31:11,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837978134] [2022-09-20 21:31:11,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-09-20 21:31:11,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:31:11,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:31:11,328 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:31:11,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-09-20 21:31:11,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-09-20 21:31:11,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:31:11,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-09-20 21:31:11,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:31:11,522 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:31:11,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:31:11,645 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:31:11,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837978134] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:31:11,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:31:11,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-09-20 21:31:11,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059049590] [2022-09-20 21:31:11,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:31:11,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-09-20 21:31:11,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:31:11,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-09-20 21:31:11,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2022-09-20 21:31:11,648 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-09-20 21:31:11,649 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 620 places, 2470 transitions, 67545 flow. Second operand has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 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 21:31:11,649 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:31:11,649 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-09-20 21:31:11,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:31:19,181 INFO L130 PetriNetUnfolder]: 2987/9217 cut-off events. [2022-09-20 21:31:19,181 INFO L131 PetriNetUnfolder]: For 434096/434096 co-relation queries the response was YES. [2022-09-20 21:31:19,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101553 conditions, 9217 events. 2987/9217 cut-off events. For 434096/434096 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 97590 event pairs, 137 based on Foata normal form. 1/9190 useless extension candidates. Maximal degree in co-relation 101367. Up to 4303 conditions per place. [2022-09-20 21:31:19,401 INFO L137 encePairwiseOnDemand]: 70/82 looper letters, 1992 selfloop transitions, 455 changer transitions 5/2497 dead transitions. [2022-09-20 21:31:19,402 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 637 places, 2497 transitions, 72984 flow [2022-09-20 21:31:19,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-09-20 21:31:19,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-09-20 21:31:19,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1100 transitions. [2022-09-20 21:31:19,403 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7452574525745257 [2022-09-20 21:31:19,403 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1100 transitions. [2022-09-20 21:31:19,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1100 transitions. [2022-09-20 21:31:19,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:31:19,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1100 transitions. [2022-09-20 21:31:19,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 61.111111111111114) internal successors, (1100), 18 states have internal predecessors, (1100), 0 states have call successors, (0), 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 21:31:19,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 82.0) internal successors, (1558), 19 states have internal predecessors, (1558), 0 states have call successors, (0), 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 21:31:19,406 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 82.0) internal successors, (1558), 19 states have internal predecessors, (1558), 0 states have call successors, (0), 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 21:31:19,406 INFO L175 Difference]: Start difference. First operand has 620 places, 2470 transitions, 67545 flow. Second operand 18 states and 1100 transitions. [2022-09-20 21:31:19,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 637 places, 2497 transitions, 72984 flow [2022-09-20 21:31:25,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 634 places, 2497 transitions, 72191 flow, removed 386 selfloop flow, removed 3 redundant places. [2022-09-20 21:31:25,236 INFO L231 Difference]: Finished difference. Result has 635 places, 2463 transitions, 67522 flow [2022-09-20 21:31:25,238 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=66659, PETRI_DIFFERENCE_MINUEND_PLACES=617, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=455, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2011, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=67522, PETRI_PLACES=635, PETRI_TRANSITIONS=2463} [2022-09-20 21:31:25,238 INFO L287 CegarLoopForPetriNet]: 72 programPoint places, 563 predicate places. [2022-09-20 21:31:25,239 INFO L495 AbstractCegarLoop]: Abstraction has has 635 places, 2463 transitions, 67522 flow [2022-09-20 21:31:25,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 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 21:31:25,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:31:25,239 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:31:25,255 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-09-20 21:31:25,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:31:25,440 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:31:25,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:31:25,440 INFO L85 PathProgramCache]: Analyzing trace with hash 968100109, now seen corresponding path program 16 times [2022-09-20 21:31:25,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:31:25,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559114202] [2022-09-20 21:31:25,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:31:25,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:31:25,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:31:25,528 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:31:25,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:31:25,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559114202] [2022-09-20 21:31:25,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559114202] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:31:25,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524436683] [2022-09-20 21:31:25,528 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-09-20 21:31:25,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:31:25,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:31:25,530 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:31:25,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-09-20 21:31:25,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-09-20 21:31:25,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:31:25,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 9 conjunts are in the unsatisfiable core [2022-09-20 21:31:25,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:31:25,718 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:31:25,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:31:25,832 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:31:25,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524436683] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:31:25,833 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:31:25,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-09-20 21:31:25,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926405993] [2022-09-20 21:31:25,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:31:25,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-09-20 21:31:25,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:31:25,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-09-20 21:31:25,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2022-09-20 21:31:25,835 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-09-20 21:31:25,836 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 635 places, 2463 transitions, 67522 flow. Second operand has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 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 21:31:25,836 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:31:25,836 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-09-20 21:31:25,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:31:33,943 INFO L130 PetriNetUnfolder]: 2992/9248 cut-off events. [2022-09-20 21:31:33,943 INFO L131 PetriNetUnfolder]: For 435445/435445 co-relation queries the response was YES. [2022-09-20 21:31:34,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101963 conditions, 9248 events. 2992/9248 cut-off events. For 435445/435445 co-relation queries the response was YES. Maximal size of possible extension queue 581. Compared 98037 event pairs, 122 based on Foata normal form. 1/9227 useless extension candidates. Maximal degree in co-relation 101777. Up to 4073 conditions per place. [2022-09-20 21:31:34,285 INFO L137 encePairwiseOnDemand]: 70/82 looper letters, 1941 selfloop transitions, 518 changer transitions 8/2512 dead transitions. [2022-09-20 21:31:34,285 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 648 places, 2512 transitions, 73657 flow [2022-09-20 21:31:34,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-09-20 21:31:34,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-09-20 21:31:34,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1101 transitions. [2022-09-20 21:31:34,288 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7459349593495935 [2022-09-20 21:31:34,288 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1101 transitions. [2022-09-20 21:31:34,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1101 transitions. [2022-09-20 21:31:34,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:31:34,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1101 transitions. [2022-09-20 21:31:34,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 61.166666666666664) internal successors, (1101), 18 states have internal predecessors, (1101), 0 states have call successors, (0), 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 21:31:34,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 82.0) internal successors, (1558), 19 states have internal predecessors, (1558), 0 states have call successors, (0), 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 21:31:34,292 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 82.0) internal successors, (1558), 19 states have internal predecessors, (1558), 0 states have call successors, (0), 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 21:31:34,292 INFO L175 Difference]: Start difference. First operand has 635 places, 2463 transitions, 67522 flow. Second operand 18 states and 1101 transitions. [2022-09-20 21:31:34,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 648 places, 2512 transitions, 73657 flow [2022-09-20 21:31:40,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 637 places, 2512 transitions, 72750 flow, removed 8 selfloop flow, removed 11 redundant places. [2022-09-20 21:31:40,320 INFO L231 Difference]: Finished difference. Result has 642 places, 2472 transitions, 67949 flow [2022-09-20 21:31:40,323 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=66631, PETRI_DIFFERENCE_MINUEND_PLACES=620, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=509, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1948, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=67949, PETRI_PLACES=642, PETRI_TRANSITIONS=2472} [2022-09-20 21:31:40,323 INFO L287 CegarLoopForPetriNet]: 72 programPoint places, 570 predicate places. [2022-09-20 21:31:40,323 INFO L495 AbstractCegarLoop]: Abstraction has has 642 places, 2472 transitions, 67949 flow [2022-09-20 21:31:40,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 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 21:31:40,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:31:40,324 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:31:40,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-09-20 21:31:40,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:31:40,539 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:31:40,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:31:40,540 INFO L85 PathProgramCache]: Analyzing trace with hash 884772427, now seen corresponding path program 17 times [2022-09-20 21:31:40,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:31:40,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614255908] [2022-09-20 21:31:40,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:31:40,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:31:40,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:31:40,622 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:31:40,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:31:40,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614255908] [2022-09-20 21:31:40,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614255908] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:31:40,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958915139] [2022-09-20 21:31:40,623 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-09-20 21:31:40,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:31:40,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:31:40,628 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:31:40,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-09-20 21:31:40,692 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-09-20 21:31:40,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:31:40,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 7 conjunts are in the unsatisfiable core [2022-09-20 21:31:40,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:31:40,783 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:31:40,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:31:40,847 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:31:40,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958915139] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:31:40,847 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:31:40,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 18 [2022-09-20 21:31:40,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635856919] [2022-09-20 21:31:40,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:31:40,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-09-20 21:31:40,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:31:40,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-09-20 21:31:40,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-09-20 21:31:40,849 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-09-20 21:31:40,850 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 642 places, 2472 transitions, 67949 flow. Second operand has 18 states, 18 states have (on average 59.611111111111114) internal successors, (1073), 18 states have internal predecessors, (1073), 0 states have call successors, (0), 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 21:31:40,850 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:31:40,850 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-09-20 21:31:40,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:31:50,804 INFO L130 PetriNetUnfolder]: 3314/10427 cut-off events. [2022-09-20 21:31:50,805 INFO L131 PetriNetUnfolder]: For 513578/513578 co-relation queries the response was YES. [2022-09-20 21:31:51,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115136 conditions, 10427 events. 3314/10427 cut-off events. For 513578/513578 co-relation queries the response was YES. Maximal size of possible extension queue 638. Compared 114228 event pairs, 149 based on Foata normal form. 10/10400 useless extension candidates. Maximal degree in co-relation 114945. Up to 3692 conditions per place. [2022-09-20 21:31:51,209 INFO L137 encePairwiseOnDemand]: 70/82 looper letters, 1962 selfloop transitions, 852 changer transitions 9/2868 dead transitions. [2022-09-20 21:31:51,210 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 669 places, 2868 transitions, 85158 flow [2022-09-20 21:31:51,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-09-20 21:31:51,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-09-20 21:31:51,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1922 transitions. [2022-09-20 21:31:51,211 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7560975609756098 [2022-09-20 21:31:51,211 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1922 transitions. [2022-09-20 21:31:51,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1922 transitions. [2022-09-20 21:31:51,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:31:51,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1922 transitions. [2022-09-20 21:31:51,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 62.0) internal successors, (1922), 31 states have internal predecessors, (1922), 0 states have call successors, (0), 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 21:31:51,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 82.0) internal successors, (2624), 32 states have internal predecessors, (2624), 0 states have call successors, (0), 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 21:31:51,215 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 82.0) internal successors, (2624), 32 states have internal predecessors, (2624), 0 states have call successors, (0), 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 21:31:51,215 INFO L175 Difference]: Start difference. First operand has 642 places, 2472 transitions, 67949 flow. Second operand 31 states and 1922 transitions. [2022-09-20 21:31:51,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 669 places, 2868 transitions, 85158 flow [2022-09-20 21:31:57,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 657 places, 2868 transitions, 84016 flow, removed 25 selfloop flow, removed 12 redundant places. [2022-09-20 21:31:58,055 INFO L231 Difference]: Finished difference. Result has 672 places, 2664 transitions, 76213 flow [2022-09-20 21:31:58,057 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=66890, PETRI_DIFFERENCE_MINUEND_PLACES=627, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=703, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1718, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=76213, PETRI_PLACES=672, PETRI_TRANSITIONS=2664} [2022-09-20 21:31:58,057 INFO L287 CegarLoopForPetriNet]: 72 programPoint places, 600 predicate places. [2022-09-20 21:31:58,057 INFO L495 AbstractCegarLoop]: Abstraction has has 672 places, 2664 transitions, 76213 flow [2022-09-20 21:31:58,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 59.611111111111114) internal successors, (1073), 18 states have internal predecessors, (1073), 0 states have call successors, (0), 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 21:31:58,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:31:58,058 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:31:58,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-09-20 21:31:58,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:31:58,264 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:31:58,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:31:58,264 INFO L85 PathProgramCache]: Analyzing trace with hash -739950759, now seen corresponding path program 18 times [2022-09-20 21:31:58,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:31:58,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745651740] [2022-09-20 21:31:58,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:31:58,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:31:58,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:31:58,343 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:31:58,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:31:58,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745651740] [2022-09-20 21:31:58,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745651740] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:31:58,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264644552] [2022-09-20 21:31:58,344 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-09-20 21:31:58,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:31:58,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:31:58,345 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:31:58,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-09-20 21:31:58,409 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-09-20 21:31:58,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:31:58,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-09-20 21:31:58,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:31:58,526 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:31:58,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:31:58,622 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-20 21:31:58,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264644552] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:31:58,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:31:58,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2022-09-20 21:31:58,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582500576] [2022-09-20 21:31:58,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:31:58,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-09-20 21:31:58,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:31:58,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-09-20 21:31:58,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2022-09-20 21:31:58,624 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-09-20 21:31:58,625 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 672 places, 2664 transitions, 76213 flow. Second operand has 22 states, 22 states have (on average 59.63636363636363) internal successors, (1312), 22 states have internal predecessors, (1312), 0 states have call successors, (0), 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 21:31:58,625 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:31:58,625 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-09-20 21:31:58,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:32:09,166 INFO L130 PetriNetUnfolder]: 3315/10517 cut-off events. [2022-09-20 21:32:09,166 INFO L131 PetriNetUnfolder]: For 585045/585045 co-relation queries the response was YES. [2022-09-20 21:32:09,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119454 conditions, 10517 events. 3315/10517 cut-off events. For 585045/585045 co-relation queries the response was YES. Maximal size of possible extension queue 640. Compared 115733 event pairs, 214 based on Foata normal form. 43/10502 useless extension candidates. Maximal degree in co-relation 119252. Up to 3256 conditions per place. [2022-09-20 21:32:09,440 INFO L137 encePairwiseOnDemand]: 70/82 looper letters, 1156 selfloop transitions, 1703 changer transitions 7/2911 dead transitions. [2022-09-20 21:32:09,440 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 704 places, 2911 transitions, 88439 flow [2022-09-20 21:32:09,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-09-20 21:32:09,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-09-20 21:32:09,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2227 transitions. [2022-09-20 21:32:09,442 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7544037940379403 [2022-09-20 21:32:09,442 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2227 transitions. [2022-09-20 21:32:09,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2227 transitions. [2022-09-20 21:32:09,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:32:09,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2227 transitions. [2022-09-20 21:32:09,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 61.861111111111114) internal successors, (2227), 36 states have internal predecessors, (2227), 0 states have call successors, (0), 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 21:32:09,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 82.0) internal successors, (3034), 37 states have internal predecessors, (3034), 0 states have call successors, (0), 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 21:32:09,448 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 82.0) internal successors, (3034), 37 states have internal predecessors, (3034), 0 states have call successors, (0), 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 21:32:09,448 INFO L175 Difference]: Start difference. First operand has 672 places, 2664 transitions, 76213 flow. Second operand 36 states and 2227 transitions. [2022-09-20 21:32:09,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 704 places, 2911 transitions, 88439 flow [2022-09-20 21:32:16,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 693 places, 2911 transitions, 87154 flow, removed 538 selfloop flow, removed 11 redundant places. [2022-09-20 21:32:16,908 INFO L231 Difference]: Finished difference. Result has 702 places, 2757 transitions, 83077 flow [2022-09-20 21:32:16,911 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=74510, PETRI_DIFFERENCE_MINUEND_PLACES=658, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1609, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1020, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=83077, PETRI_PLACES=702, PETRI_TRANSITIONS=2757} [2022-09-20 21:32:16,911 INFO L287 CegarLoopForPetriNet]: 72 programPoint places, 630 predicate places. [2022-09-20 21:32:16,911 INFO L495 AbstractCegarLoop]: Abstraction has has 702 places, 2757 transitions, 83077 flow [2022-09-20 21:32:16,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 59.63636363636363) internal successors, (1312), 22 states have internal predecessors, (1312), 0 states have call successors, (0), 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 21:32:16,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:32:16,912 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:32:16,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-09-20 21:32:17,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:32:17,127 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:32:17,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:32:17,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1913279147, now seen corresponding path program 19 times [2022-09-20 21:32:17,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:32:17,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871837337] [2022-09-20 21:32:17,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:32:17,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:32:17,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:32:17,213 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:32:17,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:32:17,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871837337] [2022-09-20 21:32:17,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871837337] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:32:17,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435745803] [2022-09-20 21:32:17,214 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-09-20 21:32:17,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:32:17,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:32:17,215 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:32:17,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-09-20 21:32:17,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:32:17,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-09-20 21:32:17,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:32:17,417 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:32:17,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:32:17,527 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:32:17,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435745803] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:32:17,528 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:32:17,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-09-20 21:32:17,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351831446] [2022-09-20 21:32:17,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:32:17,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-09-20 21:32:17,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:32:17,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-09-20 21:32:17,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-09-20 21:32:17,530 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-09-20 21:32:17,531 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 702 places, 2757 transitions, 83077 flow. Second operand has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 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 21:32:17,531 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:32:17,531 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-09-20 21:32:17,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:32:28,897 INFO L130 PetriNetUnfolder]: 3552/11346 cut-off events. [2022-09-20 21:32:28,897 INFO L131 PetriNetUnfolder]: For 665021/665021 co-relation queries the response was YES. [2022-09-20 21:32:29,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133649 conditions, 11346 events. 3552/11346 cut-off events. For 665021/665021 co-relation queries the response was YES. Maximal size of possible extension queue 683. Compared 126825 event pairs, 149 based on Foata normal form. 7/11310 useless extension candidates. Maximal degree in co-relation 133440. Up to 4074 conditions per place. [2022-09-20 21:32:29,269 INFO L137 encePairwiseOnDemand]: 70/82 looper letters, 2106 selfloop transitions, 902 changer transitions 9/3062 dead transitions. [2022-09-20 21:32:29,269 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 738 places, 3062 transitions, 98665 flow [2022-09-20 21:32:29,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-09-20 21:32:29,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-09-20 21:32:29,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2268 transitions. [2022-09-20 21:32:29,273 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7475280158206987 [2022-09-20 21:32:29,273 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2268 transitions. [2022-09-20 21:32:29,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2268 transitions. [2022-09-20 21:32:29,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:32:29,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2268 transitions. [2022-09-20 21:32:29,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 61.2972972972973) internal successors, (2268), 37 states have internal predecessors, (2268), 0 states have call successors, (0), 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 21:32:29,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 82.0) internal successors, (3116), 38 states have internal predecessors, (3116), 0 states have call successors, (0), 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 21:32:29,279 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 82.0) internal successors, (3116), 38 states have internal predecessors, (3116), 0 states have call successors, (0), 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 21:32:29,279 INFO L175 Difference]: Start difference. First operand has 702 places, 2757 transitions, 83077 flow. Second operand 37 states and 2268 transitions. [2022-09-20 21:32:29,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 738 places, 3062 transitions, 98665 flow [2022-09-20 21:32:37,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 718 places, 3062 transitions, 97894 flow, removed 168 selfloop flow, removed 20 redundant places. [2022-09-20 21:32:37,903 INFO L231 Difference]: Finished difference. Result has 728 places, 2894 transitions, 90452 flow [2022-09-20 21:32:37,905 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=82391, PETRI_DIFFERENCE_MINUEND_PLACES=682, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2753, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=767, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1873, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=90452, PETRI_PLACES=728, PETRI_TRANSITIONS=2894} [2022-09-20 21:32:37,906 INFO L287 CegarLoopForPetriNet]: 72 programPoint places, 656 predicate places. [2022-09-20 21:32:37,906 INFO L495 AbstractCegarLoop]: Abstraction has has 728 places, 2894 transitions, 90452 flow [2022-09-20 21:32:37,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 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 21:32:37,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:32:37,906 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:32:37,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-09-20 21:32:38,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-09-20 21:32:38,113 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:32:38,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:32:38,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1390055709, now seen corresponding path program 20 times [2022-09-20 21:32:38,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:32:38,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923653613] [2022-09-20 21:32:38,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:32:38,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:32:38,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:32:38,193 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:32:38,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:32:38,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923653613] [2022-09-20 21:32:38,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923653613] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:32:38,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474193156] [2022-09-20 21:32:38,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-09-20 21:32:38,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:32:38,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:32:38,196 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:32:38,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-09-20 21:32:38,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-09-20 21:32:38,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:32:38,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 13 conjunts are in the unsatisfiable core [2022-09-20 21:32:38,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:32:38,359 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:32:38,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:32:38,780 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:32:38,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474193156] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:32:38,780 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:32:38,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 11 [2022-09-20 21:32:38,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283815384] [2022-09-20 21:32:38,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:32:38,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-09-20 21:32:38,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:32:38,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-09-20 21:32:38,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-09-20 21:32:38,782 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 82 [2022-09-20 21:32:38,783 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 728 places, 2894 transitions, 90452 flow. Second operand has 11 states, 11 states have (on average 62.63636363636363) internal successors, (689), 11 states have internal predecessors, (689), 0 states have call successors, (0), 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 21:32:38,783 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:32:38,783 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 82 [2022-09-20 21:32:38,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:32:52,749 INFO L130 PetriNetUnfolder]: 5002/18127 cut-off events. [2022-09-20 21:32:52,749 INFO L131 PetriNetUnfolder]: For 1081093/1081634 co-relation queries the response was YES. [2022-09-20 21:32:53,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205977 conditions, 18127 events. 5002/18127 cut-off events. For 1081093/1081634 co-relation queries the response was YES. Maximal size of possible extension queue 908. Compared 226673 event pairs, 227 based on Foata normal form. 67/18135 useless extension candidates. Maximal degree in co-relation 205758. Up to 3241 conditions per place. [2022-09-20 21:32:53,285 INFO L137 encePairwiseOnDemand]: 76/82 looper letters, 900 selfloop transitions, 780 changer transitions 193/3741 dead transitions. [2022-09-20 21:32:53,286 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 730 places, 3741 transitions, 126315 flow [2022-09-20 21:32:53,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-09-20 21:32:53,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-09-20 21:32:53,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 462 transitions. [2022-09-20 21:32:53,288 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8048780487804879 [2022-09-20 21:32:53,288 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 462 transitions. [2022-09-20 21:32:53,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 462 transitions. [2022-09-20 21:32:53,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:32:53,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 462 transitions. [2022-09-20 21:32:53,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 66.0) internal successors, (462), 7 states have internal predecessors, (462), 0 states have call successors, (0), 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 21:32:53,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 82.0) internal successors, (656), 8 states have internal predecessors, (656), 0 states have call successors, (0), 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 21:32:53,290 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 82.0) internal successors, (656), 8 states have internal predecessors, (656), 0 states have call successors, (0), 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 21:32:53,291 INFO L175 Difference]: Start difference. First operand has 728 places, 2894 transitions, 90452 flow. Second operand 7 states and 462 transitions. [2022-09-20 21:32:53,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 730 places, 3741 transitions, 126315 flow [2022-09-20 21:33:12,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 712 places, 3741 transitions, 125682 flow, removed 121 selfloop flow, removed 18 redundant places. [2022-09-20 21:33:12,692 INFO L231 Difference]: Finished difference. Result has 717 places, 3474 transitions, 115595 flow [2022-09-20 21:33:12,694 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=89901, PETRI_DIFFERENCE_MINUEND_PLACES=706, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2894, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=243, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=115595, PETRI_PLACES=717, PETRI_TRANSITIONS=3474} [2022-09-20 21:33:12,694 INFO L287 CegarLoopForPetriNet]: 72 programPoint places, 645 predicate places. [2022-09-20 21:33:12,694 INFO L495 AbstractCegarLoop]: Abstraction has has 717 places, 3474 transitions, 115595 flow [2022-09-20 21:33:12,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 62.63636363636363) internal successors, (689), 11 states have internal predecessors, (689), 0 states have call successors, (0), 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 21:33:12,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:33:12,695 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:33:12,710 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-09-20 21:33:12,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-09-20 21:33:12,895 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:33:12,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:33:12,895 INFO L85 PathProgramCache]: Analyzing trace with hash 441697399, now seen corresponding path program 21 times [2022-09-20 21:33:12,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:33:12,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015268423] [2022-09-20 21:33:12,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:33:12,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:33:12,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:33:12,992 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:33:12,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:33:12,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015268423] [2022-09-20 21:33:12,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015268423] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:33:12,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864586127] [2022-09-20 21:33:12,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-09-20 21:33:12,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:33:12,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:33:12,993 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:33:12,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-09-20 21:33:13,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-09-20 21:33:13,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:33:13,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 8 conjunts are in the unsatisfiable core [2022-09-20 21:33:13,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:33:13,108 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:33:13,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:33:13,212 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:33:13,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864586127] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:33:13,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:33:13,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 16 [2022-09-20 21:33:13,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371163596] [2022-09-20 21:33:13,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:33:13,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-09-20 21:33:13,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:33:13,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-09-20 21:33:13,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-09-20 21:33:13,214 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-09-20 21:33:13,215 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 717 places, 3474 transitions, 115595 flow. Second operand has 16 states, 16 states have (on average 60.5625) internal successors, (969), 16 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:33:13,215 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:33:13,215 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-09-20 21:33:13,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:33:37,384 INFO L130 PetriNetUnfolder]: 6100/19958 cut-off events. [2022-09-20 21:33:37,385 INFO L131 PetriNetUnfolder]: For 1316778/1316778 co-relation queries the response was YES. [2022-09-20 21:33:37,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244499 conditions, 19958 events. 6100/19958 cut-off events. For 1316778/1316778 co-relation queries the response was YES. Maximal size of possible extension queue 1092. Compared 245478 event pairs, 436 based on Foata normal form. 144/20021 useless extension candidates. Maximal degree in co-relation 244276. Up to 6910 conditions per place. [2022-09-20 21:33:38,069 INFO L137 encePairwiseOnDemand]: 71/82 looper letters, 1865 selfloop transitions, 2198 changer transitions 198/4306 dead transitions. [2022-09-20 21:33:38,070 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 731 places, 4306 transitions, 149090 flow [2022-09-20 21:33:38,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-09-20 21:33:38,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-09-20 21:33:38,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1335 transitions. [2022-09-20 21:33:38,071 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7752613240418118 [2022-09-20 21:33:38,071 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1335 transitions. [2022-09-20 21:33:38,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1335 transitions. [2022-09-20 21:33:38,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:33:38,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1335 transitions. [2022-09-20 21:33:38,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 63.57142857142857) internal successors, (1335), 21 states have internal predecessors, (1335), 0 states have call successors, (0), 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 21:33:38,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 82.0) internal successors, (1804), 22 states have internal predecessors, (1804), 0 states have call successors, (0), 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 21:33:38,075 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 82.0) internal successors, (1804), 22 states have internal predecessors, (1804), 0 states have call successors, (0), 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 21:33:38,075 INFO L175 Difference]: Start difference. First operand has 717 places, 3474 transitions, 115595 flow. Second operand 21 states and 1335 transitions. [2022-09-20 21:33:38,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 731 places, 4306 transitions, 149090 flow [2022-09-20 21:33:59,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 718 places, 4306 transitions, 148208 flow, removed 145 selfloop flow, removed 13 redundant places. [2022-09-20 21:33:59,704 INFO L231 Difference]: Finished difference. Result has 724 places, 3705 transitions, 131042 flow [2022-09-20 21:33:59,706 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=114662, PETRI_DIFFERENCE_MINUEND_PLACES=698, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1987, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=131042, PETRI_PLACES=724, PETRI_TRANSITIONS=3705} [2022-09-20 21:33:59,707 INFO L287 CegarLoopForPetriNet]: 72 programPoint places, 652 predicate places. [2022-09-20 21:33:59,707 INFO L495 AbstractCegarLoop]: Abstraction has has 724 places, 3705 transitions, 131042 flow [2022-09-20 21:33:59,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 60.5625) internal successors, (969), 16 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-20 21:33:59,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:33:59,707 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:33:59,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-09-20 21:33:59,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:33:59,908 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:33:59,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:33:59,908 INFO L85 PathProgramCache]: Analyzing trace with hash -615969497, now seen corresponding path program 22 times [2022-09-20 21:33:59,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:33:59,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468869830] [2022-09-20 21:33:59,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:33:59,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:33:59,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:34:00,056 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:34:00,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:34:00,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468869830] [2022-09-20 21:34:00,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468869830] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:34:00,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691912361] [2022-09-20 21:34:00,057 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-09-20 21:34:00,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:34:00,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:34:00,060 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:34:00,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-09-20 21:34:00,129 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-09-20 21:34:00,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:34:00,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2022-09-20 21:34:00,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:34:00,328 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:34:00,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:34:00,605 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:34:00,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691912361] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:34:00,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:34:00,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 12] total 31 [2022-09-20 21:34:00,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430354221] [2022-09-20 21:34:00,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:34:00,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-09-20 21:34:00,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:34:00,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-09-20 21:34:00,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=777, Unknown=0, NotChecked=0, Total=930 [2022-09-20 21:34:00,608 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-09-20 21:34:00,609 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 724 places, 3705 transitions, 131042 flow. Second operand has 31 states, 31 states have (on average 59.45161290322581) internal successors, (1843), 31 states have internal predecessors, (1843), 0 states have call successors, (0), 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 21:34:00,609 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:34:00,609 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-09-20 21:34:00,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:34:36,357 INFO L130 PetriNetUnfolder]: 7555/24846 cut-off events. [2022-09-20 21:34:36,358 INFO L131 PetriNetUnfolder]: For 1808493/1808493 co-relation queries the response was YES. [2022-09-20 21:34:37,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 317992 conditions, 24846 events. 7555/24846 cut-off events. For 1808493/1808493 co-relation queries the response was YES. Maximal size of possible extension queue 1346. Compared 317850 event pairs, 301 based on Foata normal form. 149/24904 useless extension candidates. Maximal degree in co-relation 317776. Up to 4485 conditions per place. [2022-09-20 21:34:37,308 INFO L137 encePairwiseOnDemand]: 71/82 looper letters, 1232 selfloop transitions, 5498 changer transitions 379/7154 dead transitions. [2022-09-20 21:34:37,308 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 803 places, 7154 transitions, 257764 flow [2022-09-20 21:34:37,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-09-20 21:34:37,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2022-09-20 21:34:37,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 4934 transitions. [2022-09-20 21:34:37,313 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7521341463414634 [2022-09-20 21:34:37,313 INFO L72 ComplementDD]: Start complementDD. Operand 80 states and 4934 transitions. [2022-09-20 21:34:37,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 80 states and 4934 transitions. [2022-09-20 21:34:37,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:34:37,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 80 states and 4934 transitions. [2022-09-20 21:34:37,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 81 states, 80 states have (on average 61.675) internal successors, (4934), 80 states have internal predecessors, (4934), 0 states have call successors, (0), 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 21:34:37,323 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 81 states, 81 states have (on average 82.0) internal successors, (6642), 81 states have internal predecessors, (6642), 0 states have call successors, (0), 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 21:34:37,324 INFO L81 ComplementDD]: Finished complementDD. Result has 81 states, 81 states have (on average 82.0) internal successors, (6642), 81 states have internal predecessors, (6642), 0 states have call successors, (0), 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 21:34:37,324 INFO L175 Difference]: Start difference. First operand has 724 places, 3705 transitions, 131042 flow. Second operand 80 states and 4934 transitions. [2022-09-20 21:34:37,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 803 places, 7154 transitions, 257764 flow [2022-09-20 21:35:12,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 789 places, 7154 transitions, 256270 flow, removed 286 selfloop flow, removed 14 redundant places. [2022-09-20 21:35:12,285 INFO L231 Difference]: Finished difference. Result has 827 places, 6078 transitions, 227158 flow [2022-09-20 21:35:12,287 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=129878, PETRI_DIFFERENCE_MINUEND_PLACES=710, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=80, PETRI_FLOW=227158, PETRI_PLACES=827, PETRI_TRANSITIONS=6078} [2022-09-20 21:35:12,288 INFO L287 CegarLoopForPetriNet]: 72 programPoint places, 755 predicate places. [2022-09-20 21:35:12,288 INFO L495 AbstractCegarLoop]: Abstraction has has 827 places, 6078 transitions, 227158 flow [2022-09-20 21:35:12,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 59.45161290322581) internal successors, (1843), 31 states have internal predecessors, (1843), 0 states have call successors, (0), 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 21:35:12,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:35:12,289 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:35:12,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-09-20 21:35:12,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:35:12,489 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:35:12,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:35:12,490 INFO L85 PathProgramCache]: Analyzing trace with hash 2000666051, now seen corresponding path program 23 times [2022-09-20 21:35:12,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:35:12,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339260202] [2022-09-20 21:35:12,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:35:12,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:35:12,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:35:12,638 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:35:12,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:35:12,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339260202] [2022-09-20 21:35:12,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339260202] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:35:12,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126857120] [2022-09-20 21:35:12,639 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-09-20 21:35:12,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:35:12,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:35:12,644 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:35:12,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-09-20 21:35:12,717 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-09-20 21:35:12,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:35:12,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 15 conjunts are in the unsatisfiable core [2022-09-20 21:35:12,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:35:12,910 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:35:12,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:35:13,106 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:35:13,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126857120] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:35:13,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:35:13,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 13] total 34 [2022-09-20 21:35:13,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3665106] [2022-09-20 21:35:13,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:35:13,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-09-20 21:35:13,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:35:13,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-09-20 21:35:13,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=931, Unknown=0, NotChecked=0, Total=1122 [2022-09-20 21:35:13,109 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-09-20 21:35:13,110 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 827 places, 6078 transitions, 227158 flow. Second operand has 34 states, 34 states have (on average 59.3235294117647) internal successors, (2017), 34 states have internal predecessors, (2017), 0 states have call successors, (0), 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 21:35:13,110 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:35:13,110 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-09-20 21:35:13,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:36:17,736 INFO L130 PetriNetUnfolder]: 8265/27674 cut-off events. [2022-09-20 21:36:17,736 INFO L131 PetriNetUnfolder]: For 2535111/2535111 co-relation queries the response was YES. [2022-09-20 21:36:18,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 386206 conditions, 27674 events. 8265/27674 cut-off events. For 2535111/2535111 co-relation queries the response was YES. Maximal size of possible extension queue 1424. Compared 360340 event pairs, 58 based on Foata normal form. 116/27743 useless extension candidates. Maximal degree in co-relation 385953. Up to 4926 conditions per place. [2022-09-20 21:36:18,740 INFO L137 encePairwiseOnDemand]: 69/82 looper letters, 1076 selfloop transitions, 6362 changer transitions 107/7590 dead transitions. [2022-09-20 21:36:18,740 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 914 places, 7590 transitions, 294540 flow [2022-09-20 21:36:18,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-09-20 21:36:18,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2022-09-20 21:36:18,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 5382 transitions. [2022-09-20 21:36:18,744 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7458425720620843 [2022-09-20 21:36:18,744 INFO L72 ComplementDD]: Start complementDD. Operand 88 states and 5382 transitions. [2022-09-20 21:36:18,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 88 states and 5382 transitions. [2022-09-20 21:36:18,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:36:18,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 88 states and 5382 transitions. [2022-09-20 21:36:18,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 89 states, 88 states have (on average 61.15909090909091) internal successors, (5382), 88 states have internal predecessors, (5382), 0 states have call successors, (0), 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 21:36:18,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 89 states, 89 states have (on average 82.0) internal successors, (7298), 89 states have internal predecessors, (7298), 0 states have call successors, (0), 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 21:36:18,752 INFO L81 ComplementDD]: Finished complementDD. Result has 89 states, 89 states have (on average 82.0) internal successors, (7298), 89 states have internal predecessors, (7298), 0 states have call successors, (0), 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 21:36:18,752 INFO L175 Difference]: Start difference. First operand has 827 places, 6078 transitions, 227158 flow. Second operand 88 states and 5382 transitions. [2022-09-20 21:36:18,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 914 places, 7590 transitions, 294540 flow [2022-09-20 21:37:10,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 898 places, 7590 transitions, 290207 flow, removed 1995 selfloop flow, removed 16 redundant places. [2022-09-20 21:37:11,278 INFO L231 Difference]: Finished difference. Result has 921 places, 7033 transitions, 278961 flow [2022-09-20 21:37:11,284 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=223747, PETRI_DIFFERENCE_MINUEND_PLACES=811, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6078, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5417, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=88, PETRI_FLOW=278961, PETRI_PLACES=921, PETRI_TRANSITIONS=7033} [2022-09-20 21:37:11,284 INFO L287 CegarLoopForPetriNet]: 72 programPoint places, 849 predicate places. [2022-09-20 21:37:11,284 INFO L495 AbstractCegarLoop]: Abstraction has has 921 places, 7033 transitions, 278961 flow [2022-09-20 21:37:11,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 59.3235294117647) internal successors, (2017), 34 states have internal predecessors, (2017), 0 states have call successors, (0), 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 21:37:11,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:37:11,285 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:37:11,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-09-20 21:37:11,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-09-20 21:37:11,499 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:37:11,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:37:11,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1950756971, now seen corresponding path program 24 times [2022-09-20 21:37:11,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:37:11,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057184763] [2022-09-20 21:37:11,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:37:11,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:37:11,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:37:11,636 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:37:11,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:37:11,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057184763] [2022-09-20 21:37:11,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057184763] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:37:11,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068543911] [2022-09-20 21:37:11,636 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-09-20 21:37:11,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:37:11,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:37:11,637 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:37:11,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-09-20 21:37:11,706 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-09-20 21:37:11,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-20 21:37:11,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 14 conjunts are in the unsatisfiable core [2022-09-20 21:37:11,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:37:11,902 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:37:11,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:37:12,151 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:37:12,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068543911] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:37:12,152 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:37:12,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 13] total 33 [2022-09-20 21:37:12,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99823590] [2022-09-20 21:37:12,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:37:12,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-09-20 21:37:12,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:37:12,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-09-20 21:37:12,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=887, Unknown=0, NotChecked=0, Total=1056 [2022-09-20 21:37:12,154 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-09-20 21:37:12,155 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 921 places, 7033 transitions, 278961 flow. Second operand has 33 states, 33 states have (on average 59.515151515151516) internal successors, (1964), 33 states have internal predecessors, (1964), 0 states have call successors, (0), 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 21:37:12,155 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:37:12,155 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-09-20 21:37:12,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:38:38,461 INFO L130 PetriNetUnfolder]: 8589/28578 cut-off events. [2022-09-20 21:38:38,461 INFO L131 PetriNetUnfolder]: For 2709227/2709241 co-relation queries the response was YES. [2022-09-20 21:38:39,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 415689 conditions, 28578 events. 8589/28578 cut-off events. For 2709227/2709241 co-relation queries the response was YES. Maximal size of possible extension queue 1487. Compared 372851 event pairs, 103 based on Foata normal form. 68/28564 useless extension candidates. Maximal degree in co-relation 415414. Up to 5125 conditions per place. [2022-09-20 21:38:40,030 INFO L137 encePairwiseOnDemand]: 70/82 looper letters, 922 selfloop transitions, 6822 changer transitions 74/7863 dead transitions. [2022-09-20 21:38:40,030 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1021 places, 7863 transitions, 322911 flow [2022-09-20 21:38:40,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-09-20 21:38:40,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2022-09-20 21:38:40,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 6162 transitions. [2022-09-20 21:38:40,036 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7440231828060855 [2022-09-20 21:38:40,036 INFO L72 ComplementDD]: Start complementDD. Operand 101 states and 6162 transitions. [2022-09-20 21:38:40,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 101 states and 6162 transitions. [2022-09-20 21:38:40,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:38:40,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 101 states and 6162 transitions. [2022-09-20 21:38:40,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 102 states, 101 states have (on average 61.00990099009901) internal successors, (6162), 101 states have internal predecessors, (6162), 0 states have call successors, (0), 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 21:38:40,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 102 states, 102 states have (on average 82.0) internal successors, (8364), 102 states have internal predecessors, (8364), 0 states have call successors, (0), 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 21:38:40,049 INFO L81 ComplementDD]: Finished complementDD. Result has 102 states, 102 states have (on average 82.0) internal successors, (8364), 102 states have internal predecessors, (8364), 0 states have call successors, (0), 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 21:38:40,049 INFO L175 Difference]: Start difference. First operand has 921 places, 7033 transitions, 278961 flow. Second operand 101 states and 6162 transitions. [2022-09-20 21:38:40,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1021 places, 7863 transitions, 322911 flow [2022-09-20 21:39:52,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1001 places, 7863 transitions, 320685 flow, removed 917 selfloop flow, removed 20 redundant places. [2022-09-20 21:39:52,772 INFO L231 Difference]: Finished difference. Result has 1024 places, 7496 transitions, 316810 flow [2022-09-20 21:39:52,778 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=277073, PETRI_DIFFERENCE_MINUEND_PLACES=901, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7033, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6367, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=101, PETRI_FLOW=316810, PETRI_PLACES=1024, PETRI_TRANSITIONS=7496} [2022-09-20 21:39:52,783 INFO L287 CegarLoopForPetriNet]: 72 programPoint places, 952 predicate places. [2022-09-20 21:39:52,783 INFO L495 AbstractCegarLoop]: Abstraction has has 1024 places, 7496 transitions, 316810 flow [2022-09-20 21:39:52,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 59.515151515151516) internal successors, (1964), 33 states have internal predecessors, (1964), 0 states have call successors, (0), 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 21:39:52,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:39:52,784 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:39:52,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-09-20 21:39:53,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-09-20 21:39:53,008 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:39:53,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:39:53,008 INFO L85 PathProgramCache]: Analyzing trace with hash 60475501, now seen corresponding path program 25 times [2022-09-20 21:39:53,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:39:53,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460172877] [2022-09-20 21:39:53,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:39:53,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:39:53,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:39:53,143 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:39:53,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 21:39:53,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460172877] [2022-09-20 21:39:53,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460172877] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-20 21:39:53,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284186806] [2022-09-20 21:39:53,144 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-09-20 21:39:53,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-20 21:39:53,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 21:39:53,145 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-20 21:39:53,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-09-20 21:39:53,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 21:39:53,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 13 conjunts are in the unsatisfiable core [2022-09-20 21:39:53,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-20 21:39:53,345 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:39:53,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-20 21:39:53,587 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 21:39:53,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284186806] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-20 21:39:53,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-20 21:39:53,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 30 [2022-09-20 21:39:53,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822061835] [2022-09-20 21:39:53,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-20 21:39:53,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-09-20 21:39:53,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 21:39:53,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-09-20 21:39:53,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=705, Unknown=0, NotChecked=0, Total=870 [2022-09-20 21:39:53,589 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-09-20 21:39:53,590 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1024 places, 7496 transitions, 316810 flow. Second operand has 30 states, 30 states have (on average 59.333333333333336) internal successors, (1780), 30 states have internal predecessors, (1780), 0 states have call successors, (0), 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 21:39:53,590 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 21:39:53,590 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-09-20 21:39:53,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 21:41:49,660 INFO L130 PetriNetUnfolder]: 9791/31659 cut-off events. [2022-09-20 21:41:49,660 INFO L131 PetriNetUnfolder]: For 2908377/2908408 co-relation queries the response was YES. [2022-09-20 21:41:51,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 481765 conditions, 31659 events. 9791/31659 cut-off events. For 2908377/2908408 co-relation queries the response was YES. Maximal size of possible extension queue 1642. Compared 414090 event pairs, 245 based on Foata normal form. 37/31590 useless extension candidates. Maximal degree in co-relation 481470. Up to 5590 conditions per place. [2022-09-20 21:41:52,195 INFO L137 encePairwiseOnDemand]: 70/82 looper letters, 1193 selfloop transitions, 8080 changer transitions 52/9370 dead transitions. [2022-09-20 21:41:52,196 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1149 places, 9370 transitions, 411022 flow [2022-09-20 21:41:52,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-09-20 21:41:52,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2022-09-20 21:41:52,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 7765 transitions. [2022-09-20 21:41:52,202 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7456308815056655 [2022-09-20 21:41:52,202 INFO L72 ComplementDD]: Start complementDD. Operand 127 states and 7765 transitions. [2022-09-20 21:41:52,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 127 states and 7765 transitions. [2022-09-20 21:41:52,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 21:41:52,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 127 states and 7765 transitions. [2022-09-20 21:41:52,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 128 states, 127 states have (on average 61.14173228346457) internal successors, (7765), 127 states have internal predecessors, (7765), 0 states have call successors, (0), 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 21:41:52,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 128 states, 128 states have (on average 82.0) internal successors, (10496), 128 states have internal predecessors, (10496), 0 states have call successors, (0), 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 21:41:52,278 INFO L81 ComplementDD]: Finished complementDD. Result has 128 states, 128 states have (on average 82.0) internal successors, (10496), 128 states have internal predecessors, (10496), 0 states have call successors, (0), 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 21:41:52,278 INFO L175 Difference]: Start difference. First operand has 1024 places, 7496 transitions, 316810 flow. Second operand 127 states and 7765 transitions. [2022-09-20 21:41:52,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1149 places, 9370 transitions, 411022 flow [2022-09-20 21:43:21,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1123 places, 9370 transitions, 406624 flow, removed 1678 selfloop flow, removed 26 redundant places. [2022-09-20 21:43:22,374 INFO L231 Difference]: Finished difference. Result has 1170 places, 9003 transitions, 405095 flow [2022-09-20 21:43:22,379 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=313875, PETRI_DIFFERENCE_MINUEND_PLACES=997, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6597, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=613, PETRI_DIFFERENCE_SUBTRAHEND_STATES=127, PETRI_FLOW=405095, PETRI_PLACES=1170, PETRI_TRANSITIONS=9003} [2022-09-20 21:43:22,379 INFO L287 CegarLoopForPetriNet]: 72 programPoint places, 1098 predicate places. [2022-09-20 21:43:22,380 INFO L495 AbstractCegarLoop]: Abstraction has has 1170 places, 9003 transitions, 405095 flow [2022-09-20 21:43:22,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 59.333333333333336) internal successors, (1780), 30 states have internal predecessors, (1780), 0 states have call successors, (0), 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 21:43:22,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 21:43:22,380 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 21:43:22,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-09-20 21:43:22,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-09-20 21:43:22,582 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-09-20 21:43:22,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 21:43:22,583 INFO L85 PathProgramCache]: Analyzing trace with hash 83729089, now seen corresponding path program 26 times [2022-09-20 21:43:22,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 21:43:22,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079534324] [2022-09-20 21:43:22,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 21:43:22,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 21:43:22,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2022-09-20 21:43:22,705 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-09-20 21:43:22,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-09-20 21:43:22,705 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was analyzing trace of length 78 with TraceHistMax 3,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while NestedInterpolantsBuilder was constructing predicates for 76 interpolants. [2022-09-20 21:43:22,707 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2022-09-20 21:43:22,707 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2022-09-20 21:43:22,707 INFO L444 BasicCegarLoop]: Path program histogram: [26, 2, 1, 1] [2022-09-20 21:43:22,711 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-09-20 21:43:22,711 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-09-20 21:43:22,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 09:43:22 BasicIcfg [2022-09-20 21:43:22,715 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-09-20 21:43:22,715 INFO L158 Benchmark]: Toolchain (without parser) took 800059.55ms. Allocated memory was 173.0MB in the beginning and 6.4GB in the end (delta: 6.3GB). Free memory was 115.6MB in the beginning and 4.2GB in the end (delta: -4.1GB). Peak memory consumption was 2.2GB. Max. memory is 8.0GB. [2022-09-20 21:43:22,716 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 173.0MB. Free memory is still 131.7MB. There was no memory consumed. Max. memory is 8.0GB. [2022-09-20 21:43:22,716 INFO L158 Benchmark]: CACSL2BoogieTranslator took 313.23ms. Allocated memory is still 173.0MB. Free memory was 115.3MB in the beginning and 147.8MB in the end (delta: -32.4MB). Peak memory consumption was 11.2MB. Max. memory is 8.0GB. [2022-09-20 21:43:22,716 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.15ms. Allocated memory is still 173.0MB. Free memory was 147.8MB in the beginning and 146.3MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-09-20 21:43:22,716 INFO L158 Benchmark]: Boogie Preprocessor took 19.93ms. Allocated memory is still 173.0MB. Free memory was 146.3MB in the beginning and 145.3MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-09-20 21:43:22,716 INFO L158 Benchmark]: RCFGBuilder took 296.13ms. Allocated memory is still 173.0MB. Free memory was 145.0MB in the beginning and 132.4MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-09-20 21:43:22,717 INFO L158 Benchmark]: TraceAbstraction took 799392.96ms. Allocated memory was 173.0MB in the beginning and 6.4GB in the end (delta: 6.3GB). Free memory was 131.7MB in the beginning and 4.2GB in the end (delta: -4.1GB). Peak memory consumption was 2.2GB. Max. memory is 8.0GB. [2022-09-20 21:43:22,721 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 173.0MB. Free memory is still 131.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 313.23ms. Allocated memory is still 173.0MB. Free memory was 115.3MB in the beginning and 147.8MB in the end (delta: -32.4MB). Peak memory consumption was 11.2MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 32.15ms. Allocated memory is still 173.0MB. Free memory was 147.8MB in the beginning and 146.3MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 19.93ms. Allocated memory is still 173.0MB. Free memory was 146.3MB in the beginning and 145.3MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 296.13ms. Allocated memory is still 173.0MB. Free memory was 145.0MB in the beginning and 132.4MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 799392.96ms. Allocated memory was 173.0MB in the beginning and 6.4GB in the end (delta: 6.3GB). Free memory was 131.7MB in the beginning and 4.2GB in the end (delta: -4.1GB). Peak memory consumption was 2.2GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 77]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was analyzing trace of length 78 with TraceHistMax 3,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while NestedInterpolantsBuilder was constructing predicates for 76 interpolants. - TimeoutResultAtElement [Line: 72]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 78 with TraceHistMax 3,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while NestedInterpolantsBuilder was constructing predicates for 76 interpolants. - TimeoutResultAtElement [Line: 71]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 78 with TraceHistMax 3,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while NestedInterpolantsBuilder was constructing predicates for 76 interpolants. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 94 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: 799.2s, OverallIterations: 30, TraceHistogramMax: 3, PathProgramHistogramMax: 26, EmptinessCheckTime: 0.0s, AutomataDifference: 779.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4484 SdHoareTripleChecker+Valid, 9.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4484 mSDsluCounter, 3906 SdHoareTripleChecker+Invalid, 7.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 5900 mSDsCounter, 1893 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 18391 IncrementalHoareTripleChecker+Invalid, 20284 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1893 mSolverCounterUnsat, 584 mSDtfsCounter, 18391 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4786 GetRequests, 3290 SyntacticMatches, 48 SemanticMatches, 1448 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35035 ImplicationChecksByTransitivity, 18.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=405095occurred in iteration=29, InterpolantAutomatonStates: 1149, 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: 0.3s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 10.8s InterpolantComputationTime, 3849 NumberOfCodeBlocks, 3824 NumberOfCodeBlocksAsserted, 89 NumberOfCheckSat, 5541 ConstructedInterpolants, 0 QuantifiedInterpolants, 18702 SizeOfPredicates, 233 NumberOfNonLiveVariables, 3994 ConjunctsInSsa, 252 ConjunctsInUnsatCore, 80 InterpolantComputations, 4 PerfectInterpolantSequences, 320/753 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown