/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-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/fibonacci.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-8d0d62b [2022-12-05 21:07:38,703 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-05 21:07:38,704 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-05 21:07:38,753 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-05 21:07:38,753 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-05 21:07:38,756 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-05 21:07:38,759 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-05 21:07:38,764 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-05 21:07:38,769 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-05 21:07:38,774 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-05 21:07:38,774 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-05 21:07:38,775 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-05 21:07:38,775 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-05 21:07:38,776 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-05 21:07:38,776 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-05 21:07:38,777 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-05 21:07:38,777 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-05 21:07:38,778 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-05 21:07:38,779 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-05 21:07:38,780 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-05 21:07:38,781 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-05 21:07:38,787 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-05 21:07:38,789 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-05 21:07:38,790 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-05 21:07:38,797 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-12-05 21:07:38,799 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-05 21:07:38,799 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-05 21:07:38,800 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-05 21:07:38,800 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-05 21:07:38,801 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-05 21:07:38,801 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-05 21:07:38,801 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-05 21:07:38,802 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-05 21:07:38,802 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-05 21:07:38,802 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-05 21:07:38,803 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-05 21:07:38,810 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-SemanticLbe.epf [2022-12-05 21:07:38,837 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-05 21:07:38,837 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-05 21:07:38,838 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-05 21:07:38,838 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-05 21:07:38,839 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-05 21:07:38,839 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-05 21:07:38,839 INFO L138 SettingsManager]: * Use SBE=true [2022-12-05 21:07:38,840 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-05 21:07:38,840 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-05 21:07:38,840 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-05 21:07:38,840 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-05 21:07:38,840 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-05 21:07:38,841 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-05 21:07:38,841 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-05 21:07:38,841 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-05 21:07:38,841 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-05 21:07:38,841 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-05 21:07:38,841 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-05 21:07:38,841 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-05 21:07:38,841 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-05 21:07:38,841 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-05 21:07:38,841 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-05 21:07:38,842 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-05 21:07:38,842 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-05 21:07:38,842 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-05 21:07:38,842 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-05 21:07:38,842 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-05 21:07:38,842 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-05 21:07:38,842 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-05 21:07:38,842 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-05 21:07:38,842 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-12-05 21:07:39,091 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-05 21:07:39,106 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-05 21:07:39,108 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-05 21:07:39,108 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-05 21:07:39,109 INFO L275 PluginConnector]: CDTParser initialized [2022-12-05 21:07:39,110 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/fibonacci.wvr.c [2022-12-05 21:07:40,037 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-05 21:07:40,197 INFO L351 CDTParser]: Found 1 translation units. [2022-12-05 21:07:40,197 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/fibonacci.wvr.c [2022-12-05 21:07:40,203 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae92fa816/debd609fe5c34cb9928855a9fa8b4ef8/FLAG625dfbcdc [2022-12-05 21:07:40,216 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae92fa816/debd609fe5c34cb9928855a9fa8b4ef8 [2022-12-05 21:07:40,218 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-05 21:07:40,219 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-05 21:07:40,220 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-05 21:07:40,220 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-05 21:07:40,222 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-05 21:07:40,223 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:07:40" (1/1) ... [2022-12-05 21:07:40,223 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f6dcf3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:07:40, skipping insertion in model container [2022-12-05 21:07:40,223 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:07:40" (1/1) ... [2022-12-05 21:07:40,228 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-05 21:07:40,240 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-05 21:07:40,382 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/fibonacci.wvr.c[2330,2343] [2022-12-05 21:07:40,397 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-05 21:07:40,406 INFO L203 MainTranslator]: Completed pre-run [2022-12-05 21:07:40,437 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/fibonacci.wvr.c[2330,2343] [2022-12-05 21:07:40,439 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-05 21:07:40,450 INFO L208 MainTranslator]: Completed translation [2022-12-05 21:07:40,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:07:40 WrapperNode [2022-12-05 21:07:40,451 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-05 21:07:40,452 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-05 21:07:40,452 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-05 21:07:40,453 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-05 21:07:40,457 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:07:40" (1/1) ... [2022-12-05 21:07:40,470 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:07:40" (1/1) ... [2022-12-05 21:07:40,496 INFO L138 Inliner]: procedures = 23, calls = 28, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 162 [2022-12-05 21:07:40,496 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-05 21:07:40,497 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-05 21:07:40,498 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-05 21:07:40,498 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-05 21:07:40,504 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:07:40" (1/1) ... [2022-12-05 21:07:40,504 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:07:40" (1/1) ... [2022-12-05 21:07:40,515 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:07:40" (1/1) ... [2022-12-05 21:07:40,516 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:07:40" (1/1) ... [2022-12-05 21:07:40,523 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:07:40" (1/1) ... [2022-12-05 21:07:40,531 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:07:40" (1/1) ... [2022-12-05 21:07:40,532 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:07:40" (1/1) ... [2022-12-05 21:07:40,533 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:07:40" (1/1) ... [2022-12-05 21:07:40,535 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-05 21:07:40,535 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-05 21:07:40,535 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-05 21:07:40,536 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-05 21:07:40,536 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:07:40" (1/1) ... [2022-12-05 21:07:40,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-05 21:07:40,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:07:40,587 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) [2022-12-05 21:07:40,591 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 [2022-12-05 21:07:40,611 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-05 21:07:40,611 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-05 21:07:40,612 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-05 21:07:40,612 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-05 21:07:40,612 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-05 21:07:40,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-05 21:07:40,612 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-05 21:07:40,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-05 21:07:40,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-05 21:07:40,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-05 21:07:40,612 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-05 21:07:40,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-05 21:07:40,613 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-05 21:07:40,677 INFO L236 CfgBuilder]: Building ICFG [2022-12-05 21:07:40,679 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-05 21:07:40,938 INFO L277 CfgBuilder]: Performing block encoding [2022-12-05 21:07:40,944 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-05 21:07:40,945 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-05 21:07:40,946 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:07:40 BoogieIcfgContainer [2022-12-05 21:07:40,946 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-05 21:07:40,948 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-05 21:07:40,948 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-05 21:07:40,950 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-05 21:07:40,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.12 09:07:40" (1/3) ... [2022-12-05 21:07:40,951 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4643f325 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:07:40, skipping insertion in model container [2022-12-05 21:07:40,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:07:40" (2/3) ... [2022-12-05 21:07:40,951 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4643f325 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:07:40, skipping insertion in model container [2022-12-05 21:07:40,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:07:40" (3/3) ... [2022-12-05 21:07:40,952 INFO L112 eAbstractionObserver]: Analyzing ICFG fibonacci.wvr.c [2022-12-05 21:07:40,965 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-05 21:07:40,965 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-05 21:07:40,965 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-05 21:07:41,055 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-05 21:07:41,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 182 places, 189 transitions, 394 flow [2022-12-05 21:07:41,142 INFO L130 PetriNetUnfolder]: 14/187 cut-off events. [2022-12-05 21:07:41,142 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-05 21:07:41,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 187 events. 14/187 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 284 event pairs, 0 based on Foata normal form. 0/172 useless extension candidates. Maximal degree in co-relation 119. Up to 2 conditions per place. [2022-12-05 21:07:41,151 INFO L82 GeneralOperation]: Start removeDead. Operand has 182 places, 189 transitions, 394 flow [2022-12-05 21:07:41,155 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 172 places, 179 transitions, 370 flow [2022-12-05 21:07:41,157 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-05 21:07:41,169 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 172 places, 179 transitions, 370 flow [2022-12-05 21:07:41,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 172 places, 179 transitions, 370 flow [2022-12-05 21:07:41,202 INFO L130 PetriNetUnfolder]: 14/179 cut-off events. [2022-12-05 21:07:41,202 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-05 21:07:41,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188 conditions, 179 events. 14/179 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 248 event pairs, 0 based on Foata normal form. 0/165 useless extension candidates. Maximal degree in co-relation 119. Up to 2 conditions per place. [2022-12-05 21:07:41,208 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 172 places, 179 transitions, 370 flow [2022-12-05 21:07:41,208 INFO L188 LiptonReduction]: Number of co-enabled transitions 7452 [2022-12-05 21:07:47,189 INFO L203 LiptonReduction]: Total number of compositions: 164 [2022-12-05 21:07:47,200 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-05 21:07:47,205 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;@67cbe129, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-05 21:07:47,205 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-05 21:07:47,212 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2022-12-05 21:07:47,212 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-05 21:07:47,212 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:07:47,212 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:07:47,213 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:07:47,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:07:47,216 INFO L85 PathProgramCache]: Analyzing trace with hash 2113518840, now seen corresponding path program 1 times [2022-12-05 21:07:47,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:07:47,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605152659] [2022-12-05 21:07:47,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:07:47,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:07:47,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:07:47,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:47,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:07:47,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605152659] [2022-12-05 21:07:47,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605152659] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:07:47,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:07:47,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-05 21:07:47,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983883547] [2022-12-05 21:07:47,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:07:47,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-05 21:07:47,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:07:47,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-05 21:07:47,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-05 21:07:47,692 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 15 [2022-12-05 21:07:47,693 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:47,693 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:07:47,693 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 15 [2022-12-05 21:07:47,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:07:47,804 INFO L130 PetriNetUnfolder]: 64/119 cut-off events. [2022-12-05 21:07:47,805 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-12-05 21:07:47,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 119 events. 64/119 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 334 event pairs, 7 based on Foata normal form. 1/79 useless extension candidates. Maximal degree in co-relation 181. Up to 85 conditions per place. [2022-12-05 21:07:47,806 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 23 selfloop transitions, 5 changer transitions 5/35 dead transitions. [2022-12-05 21:07:47,806 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 35 transitions, 166 flow [2022-12-05 21:07:47,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-05 21:07:47,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-05 21:07:47,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 44 transitions. [2022-12-05 21:07:47,815 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5866666666666667 [2022-12-05 21:07:47,816 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 5 states and 44 transitions. [2022-12-05 21:07:47,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 35 transitions, 166 flow [2022-12-05 21:07:47,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 35 transitions, 146 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-05 21:07:47,819 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 68 flow [2022-12-05 21:07:47,820 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=68, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2022-12-05 21:07:47,823 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2022-12-05 21:07:47,824 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 68 flow [2022-12-05 21:07:47,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:47,824 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:07:47,824 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:07:47,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-05 21:07:47,825 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:07:47,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:07:47,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1937234240, now seen corresponding path program 2 times [2022-12-05 21:07:47,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:07:47,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68063344] [2022-12-05 21:07:47,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:07:47,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:07:47,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:07:48,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:48,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:07:48,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68063344] [2022-12-05 21:07:48,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68063344] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:07:48,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:07:48,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-05 21:07:48,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447395659] [2022-12-05 21:07:48,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:07:48,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-05 21:07:48,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:07:48,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-05 21:07:48,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-05 21:07:48,071 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 15 [2022-12-05 21:07:48,071 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 68 flow. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:48,071 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:07:48,071 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 15 [2022-12-05 21:07:48,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:07:48,171 INFO L130 PetriNetUnfolder]: 63/111 cut-off events. [2022-12-05 21:07:48,172 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-12-05 21:07:48,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325 conditions, 111 events. 63/111 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 283 event pairs, 5 based on Foata normal form. 1/94 useless extension candidates. Maximal degree in co-relation 316. Up to 85 conditions per place. [2022-12-05 21:07:48,181 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 21 selfloop transitions, 6 changer transitions 5/34 dead transitions. [2022-12-05 21:07:48,182 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 34 transitions, 176 flow [2022-12-05 21:07:48,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-05 21:07:48,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-05 21:07:48,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 42 transitions. [2022-12-05 21:07:48,184 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.56 [2022-12-05 21:07:48,184 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 68 flow. Second operand 5 states and 42 transitions. [2022-12-05 21:07:48,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 34 transitions, 176 flow [2022-12-05 21:07:48,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 34 transitions, 174 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-05 21:07:48,186 INFO L231 Difference]: Finished difference. Result has 28 places, 21 transitions, 100 flow [2022-12-05 21:07:48,186 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=100, PETRI_PLACES=28, PETRI_TRANSITIONS=21} [2022-12-05 21:07:48,187 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 8 predicate places. [2022-12-05 21:07:48,187 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 21 transitions, 100 flow [2022-12-05 21:07:48,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:48,187 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:07:48,187 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:07:48,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-05 21:07:48,187 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:07:48,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:07:48,189 INFO L85 PathProgramCache]: Analyzing trace with hash 274276736, now seen corresponding path program 1 times [2022-12-05 21:07:48,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:07:48,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011754966] [2022-12-05 21:07:48,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:07:48,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:07:48,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:07:48,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:48,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:07:48,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011754966] [2022-12-05 21:07:48,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011754966] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:07:48,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682878628] [2022-12-05 21:07:48,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:07:48,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:07:48,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:07:48,234 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) [2022-12-05 21:07:48,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-05 21:07:48,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:07:48,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-05 21:07:48,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:07:48,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:48,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:07:48,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:48,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682878628] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:07:48,392 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:07:48,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-12-05 21:07:48,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163135143] [2022-12-05 21:07:48,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:07:48,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-05 21:07:48,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:07:48,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-05 21:07:48,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-05 21:07:48,394 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:07:48,394 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 21 transitions, 100 flow. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:48,394 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:07:48,394 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:07:48,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:07:48,537 INFO L130 PetriNetUnfolder]: 93/168 cut-off events. [2022-12-05 21:07:48,537 INFO L131 PetriNetUnfolder]: For 91/91 co-relation queries the response was YES. [2022-12-05 21:07:48,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 525 conditions, 168 events. 93/168 cut-off events. For 91/91 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 505 event pairs, 12 based on Foata normal form. 0/154 useless extension candidates. Maximal degree in co-relation 510. Up to 71 conditions per place. [2022-12-05 21:07:48,538 INFO L137 encePairwiseOnDemand]: 10/15 looper letters, 41 selfloop transitions, 6 changer transitions 0/47 dead transitions. [2022-12-05 21:07:48,538 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 47 transitions, 287 flow [2022-12-05 21:07:48,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-05 21:07:48,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-05 21:07:48,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 40 transitions. [2022-12-05 21:07:48,540 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2022-12-05 21:07:48,540 INFO L175 Difference]: Start difference. First operand has 28 places, 21 transitions, 100 flow. Second operand 5 states and 40 transitions. [2022-12-05 21:07:48,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 47 transitions, 287 flow [2022-12-05 21:07:48,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 47 transitions, 271 flow, removed 5 selfloop flow, removed 2 redundant places. [2022-12-05 21:07:48,544 INFO L231 Difference]: Finished difference. Result has 32 places, 24 transitions, 132 flow [2022-12-05 21:07:48,544 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=132, PETRI_PLACES=32, PETRI_TRANSITIONS=24} [2022-12-05 21:07:48,545 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 12 predicate places. [2022-12-05 21:07:48,545 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 24 transitions, 132 flow [2022-12-05 21:07:48,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:48,545 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:07:48,545 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:07:48,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-05 21:07:48,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:07:48,752 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:07:48,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:07:48,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1102818049, now seen corresponding path program 1 times [2022-12-05 21:07:48,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:07:48,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153989099] [2022-12-05 21:07:48,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:07:48,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:07:48,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:07:48,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:48,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:07:48,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153989099] [2022-12-05 21:07:48,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153989099] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:07:48,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:07:48,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-05 21:07:48,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189699450] [2022-12-05 21:07:48,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:07:48,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-05 21:07:48,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:07:48,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-05 21:07:48,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-05 21:07:48,808 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:07:48,808 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 24 transitions, 132 flow. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:48,808 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:07:48,809 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:07:48,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:07:48,900 INFO L130 PetriNetUnfolder]: 114/211 cut-off events. [2022-12-05 21:07:48,901 INFO L131 PetriNetUnfolder]: For 286/286 co-relation queries the response was YES. [2022-12-05 21:07:48,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 751 conditions, 211 events. 114/211 cut-off events. For 286/286 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 657 event pairs, 38 based on Foata normal form. 6/197 useless extension candidates. Maximal degree in co-relation 515. Up to 134 conditions per place. [2022-12-05 21:07:48,902 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 33 selfloop transitions, 11 changer transitions 6/50 dead transitions. [2022-12-05 21:07:48,902 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 50 transitions, 355 flow [2022-12-05 21:07:48,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-05 21:07:48,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-05 21:07:48,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 41 transitions. [2022-12-05 21:07:48,903 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.45555555555555555 [2022-12-05 21:07:48,903 INFO L175 Difference]: Start difference. First operand has 32 places, 24 transitions, 132 flow. Second operand 6 states and 41 transitions. [2022-12-05 21:07:48,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 50 transitions, 355 flow [2022-12-05 21:07:48,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 50 transitions, 348 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-12-05 21:07:48,906 INFO L231 Difference]: Finished difference. Result has 40 places, 29 transitions, 212 flow [2022-12-05 21:07:48,906 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=212, PETRI_PLACES=40, PETRI_TRANSITIONS=29} [2022-12-05 21:07:48,906 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 20 predicate places. [2022-12-05 21:07:48,906 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 29 transitions, 212 flow [2022-12-05 21:07:48,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:48,907 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:07:48,907 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:07:48,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-05 21:07:48,907 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:07:48,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:07:48,907 INFO L85 PathProgramCache]: Analyzing trace with hash 879946317, now seen corresponding path program 2 times [2022-12-05 21:07:48,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:07:48,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090140076] [2022-12-05 21:07:48,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:07:48,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:07:48,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:07:48,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:48,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:07:48,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090140076] [2022-12-05 21:07:48,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090140076] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:07:48,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:07:48,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-05 21:07:48,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477394050] [2022-12-05 21:07:48,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:07:48,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-05 21:07:48,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:07:48,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-05 21:07:48,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-05 21:07:48,945 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:07:48,945 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 29 transitions, 212 flow. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:48,945 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:07:48,945 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:07:48,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:07:49,007 INFO L130 PetriNetUnfolder]: 109/204 cut-off events. [2022-12-05 21:07:49,007 INFO L131 PetriNetUnfolder]: For 478/478 co-relation queries the response was YES. [2022-12-05 21:07:49,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 859 conditions, 204 events. 109/204 cut-off events. For 478/478 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 652 event pairs, 40 based on Foata normal form. 4/194 useless extension candidates. Maximal degree in co-relation 828. Up to 130 conditions per place. [2022-12-05 21:07:49,008 INFO L137 encePairwiseOnDemand]: 10/15 looper letters, 36 selfloop transitions, 8 changer transitions 7/51 dead transitions. [2022-12-05 21:07:49,008 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 51 transitions, 417 flow [2022-12-05 21:07:49,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-05 21:07:49,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-05 21:07:49,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 37 transitions. [2022-12-05 21:07:49,009 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.49333333333333335 [2022-12-05 21:07:49,009 INFO L175 Difference]: Start difference. First operand has 40 places, 29 transitions, 212 flow. Second operand 5 states and 37 transitions. [2022-12-05 21:07:49,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 51 transitions, 417 flow [2022-12-05 21:07:49,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 51 transitions, 381 flow, removed 13 selfloop flow, removed 2 redundant places. [2022-12-05 21:07:49,013 INFO L231 Difference]: Finished difference. Result has 44 places, 30 transitions, 225 flow [2022-12-05 21:07:49,013 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=225, PETRI_PLACES=44, PETRI_TRANSITIONS=30} [2022-12-05 21:07:49,013 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 24 predicate places. [2022-12-05 21:07:49,013 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 30 transitions, 225 flow [2022-12-05 21:07:49,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:49,013 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:07:49,014 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:07:49,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-05 21:07:49,014 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:07:49,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:07:49,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1965104270, now seen corresponding path program 2 times [2022-12-05 21:07:49,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:07:49,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811349841] [2022-12-05 21:07:49,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:07:49,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:07:49,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:07:49,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:49,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:07:49,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811349841] [2022-12-05 21:07:49,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811349841] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:07:49,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49412433] [2022-12-05 21:07:49,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 21:07:49,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:07:49,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:07:49,052 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) [2022-12-05 21:07:49,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-05 21:07:49,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:07:49,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:07:49,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-05 21:07:49,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:07:49,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:49,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:07:49,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:49,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49412433] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:07:49,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:07:49,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-12-05 21:07:49,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250177397] [2022-12-05 21:07:49,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:07:49,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-05 21:07:49,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:07:49,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-05 21:07:49,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-05 21:07:49,172 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:07:49,173 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 30 transitions, 225 flow. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:49,173 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:07:49,173 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:07:49,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:07:49,285 INFO L130 PetriNetUnfolder]: 124/235 cut-off events. [2022-12-05 21:07:49,286 INFO L131 PetriNetUnfolder]: For 586/586 co-relation queries the response was YES. [2022-12-05 21:07:49,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 973 conditions, 235 events. 124/235 cut-off events. For 586/586 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 800 event pairs, 16 based on Foata normal form. 6/227 useless extension candidates. Maximal degree in co-relation 932. Up to 104 conditions per place. [2022-12-05 21:07:49,287 INFO L137 encePairwiseOnDemand]: 10/15 looper letters, 54 selfloop transitions, 15 changer transitions 2/71 dead transitions. [2022-12-05 21:07:49,287 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 71 transitions, 553 flow [2022-12-05 21:07:49,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-05 21:07:49,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-05 21:07:49,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 61 transitions. [2022-12-05 21:07:49,289 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5083333333333333 [2022-12-05 21:07:49,289 INFO L175 Difference]: Start difference. First operand has 44 places, 30 transitions, 225 flow. Second operand 8 states and 61 transitions. [2022-12-05 21:07:49,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 71 transitions, 553 flow [2022-12-05 21:07:49,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 71 transitions, 529 flow, removed 5 selfloop flow, removed 3 redundant places. [2022-12-05 21:07:49,293 INFO L231 Difference]: Finished difference. Result has 51 places, 36 transitions, 309 flow [2022-12-05 21:07:49,293 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=309, PETRI_PLACES=51, PETRI_TRANSITIONS=36} [2022-12-05 21:07:49,293 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 31 predicate places. [2022-12-05 21:07:49,293 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 36 transitions, 309 flow [2022-12-05 21:07:49,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:49,293 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:07:49,294 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:07:49,308 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-05 21:07:49,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-05 21:07:49,498 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:07:49,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:07:49,499 INFO L85 PathProgramCache]: Analyzing trace with hash 17592907, now seen corresponding path program 3 times [2022-12-05 21:07:49,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:07:49,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511515540] [2022-12-05 21:07:49,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:07:49,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:07:49,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:07:49,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:49,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:07:49,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511515540] [2022-12-05 21:07:49,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511515540] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:07:49,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723543612] [2022-12-05 21:07:49,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 21:07:49,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:07:49,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:07:49,556 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) [2022-12-05 21:07:49,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-05 21:07:49,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-05 21:07:49,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:07:49,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-05 21:07:49,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:07:49,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:49,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:07:49,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:49,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723543612] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:07:49,648 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:07:49,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-12-05 21:07:49,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417173305] [2022-12-05 21:07:49,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:07:49,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-05 21:07:49,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:07:49,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-05 21:07:49,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-05 21:07:49,655 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:07:49,655 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 36 transitions, 309 flow. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:49,655 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:07:49,655 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:07:49,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:07:49,764 INFO L130 PetriNetUnfolder]: 130/245 cut-off events. [2022-12-05 21:07:49,764 INFO L131 PetriNetUnfolder]: For 824/824 co-relation queries the response was YES. [2022-12-05 21:07:49,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1112 conditions, 245 events. 130/245 cut-off events. For 824/824 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 842 event pairs, 20 based on Foata normal form. 4/233 useless extension candidates. Maximal degree in co-relation 919. Up to 104 conditions per place. [2022-12-05 21:07:49,766 INFO L137 encePairwiseOnDemand]: 10/15 looper letters, 40 selfloop transitions, 13 changer transitions 1/54 dead transitions. [2022-12-05 21:07:49,766 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 54 transitions, 514 flow [2022-12-05 21:07:49,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-05 21:07:49,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-05 21:07:49,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 36 transitions. [2022-12-05 21:07:49,768 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.48 [2022-12-05 21:07:49,768 INFO L175 Difference]: Start difference. First operand has 51 places, 36 transitions, 309 flow. Second operand 5 states and 36 transitions. [2022-12-05 21:07:49,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 54 transitions, 514 flow [2022-12-05 21:07:49,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 54 transitions, 489 flow, removed 5 selfloop flow, removed 3 redundant places. [2022-12-05 21:07:49,773 INFO L231 Difference]: Finished difference. Result has 54 places, 38 transitions, 350 flow [2022-12-05 21:07:49,773 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=350, PETRI_PLACES=54, PETRI_TRANSITIONS=38} [2022-12-05 21:07:49,775 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 34 predicate places. [2022-12-05 21:07:49,775 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 38 transitions, 350 flow [2022-12-05 21:07:49,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:49,775 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:07:49,775 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:07:49,792 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-05 21:07:49,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:07:49,980 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:07:49,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:07:49,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1129638706, now seen corresponding path program 3 times [2022-12-05 21:07:49,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:07:49,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896275325] [2022-12-05 21:07:49,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:07:49,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:07:49,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:07:50,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:50,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:07:50,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896275325] [2022-12-05 21:07:50,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896275325] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:07:50,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:07:50,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-05 21:07:50,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079874185] [2022-12-05 21:07:50,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:07:50,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-05 21:07:50,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:07:50,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-05 21:07:50,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-05 21:07:50,021 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:07:50,021 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 38 transitions, 350 flow. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:50,021 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:07:50,021 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:07:50,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:07:50,114 INFO L130 PetriNetUnfolder]: 122/229 cut-off events. [2022-12-05 21:07:50,114 INFO L131 PetriNetUnfolder]: For 989/989 co-relation queries the response was YES. [2022-12-05 21:07:50,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1054 conditions, 229 events. 122/229 cut-off events. For 989/989 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 767 event pairs, 40 based on Foata normal form. 6/219 useless extension candidates. Maximal degree in co-relation 935. Up to 160 conditions per place. [2022-12-05 21:07:50,129 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 36 selfloop transitions, 11 changer transitions 9/56 dead transitions. [2022-12-05 21:07:50,129 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 56 transitions, 518 flow [2022-12-05 21:07:50,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-05 21:07:50,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-05 21:07:50,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 42 transitions. [2022-12-05 21:07:50,130 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2022-12-05 21:07:50,130 INFO L175 Difference]: Start difference. First operand has 54 places, 38 transitions, 350 flow. Second operand 6 states and 42 transitions. [2022-12-05 21:07:50,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 56 transitions, 518 flow [2022-12-05 21:07:50,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 56 transitions, 501 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-12-05 21:07:50,134 INFO L231 Difference]: Finished difference. Result has 57 places, 34 transitions, 302 flow [2022-12-05 21:07:50,134 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=302, PETRI_PLACES=57, PETRI_TRANSITIONS=34} [2022-12-05 21:07:50,136 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 37 predicate places. [2022-12-05 21:07:50,136 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 34 transitions, 302 flow [2022-12-05 21:07:50,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:50,136 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:07:50,136 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:07:50,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-05 21:07:50,136 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:07:50,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:07:50,137 INFO L85 PathProgramCache]: Analyzing trace with hash 552912597, now seen corresponding path program 4 times [2022-12-05 21:07:50,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:07:50,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747556776] [2022-12-05 21:07:50,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:07:50,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:07:50,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:07:50,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:50,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:07:50,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747556776] [2022-12-05 21:07:50,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747556776] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:07:50,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221997495] [2022-12-05 21:07:50,182 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 21:07:50,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:07:50,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:07:50,183 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) [2022-12-05 21:07:50,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-05 21:07:50,250 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 21:07:50,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:07:50,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-05 21:07:50,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:07:50,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:50,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:07:50,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:50,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221997495] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:07:50,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:07:50,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-12-05 21:07:50,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611702552] [2022-12-05 21:07:50,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:07:50,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-05 21:07:50,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:07:50,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-05 21:07:50,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-05 21:07:50,289 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:07:50,289 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 34 transitions, 302 flow. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:50,289 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:07:50,289 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:07:50,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:07:50,398 INFO L130 PetriNetUnfolder]: 122/219 cut-off events. [2022-12-05 21:07:50,399 INFO L131 PetriNetUnfolder]: For 849/849 co-relation queries the response was YES. [2022-12-05 21:07:50,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1025 conditions, 219 events. 122/219 cut-off events. For 849/849 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 673 event pairs, 43 based on Foata normal form. 4/205 useless extension candidates. Maximal degree in co-relation 1003. Up to 161 conditions per place. [2022-12-05 21:07:50,400 INFO L137 encePairwiseOnDemand]: 10/15 looper letters, 37 selfloop transitions, 11 changer transitions 0/48 dead transitions. [2022-12-05 21:07:50,400 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 48 transitions, 456 flow [2022-12-05 21:07:50,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-05 21:07:50,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-05 21:07:50,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 35 transitions. [2022-12-05 21:07:50,402 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2022-12-05 21:07:50,402 INFO L175 Difference]: Start difference. First operand has 57 places, 34 transitions, 302 flow. Second operand 5 states and 35 transitions. [2022-12-05 21:07:50,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 48 transitions, 456 flow [2022-12-05 21:07:50,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 48 transitions, 407 flow, removed 4 selfloop flow, removed 7 redundant places. [2022-12-05 21:07:50,405 INFO L231 Difference]: Finished difference. Result has 52 places, 35 transitions, 292 flow [2022-12-05 21:07:50,405 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=292, PETRI_PLACES=52, PETRI_TRANSITIONS=35} [2022-12-05 21:07:50,406 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 32 predicate places. [2022-12-05 21:07:50,406 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 35 transitions, 292 flow [2022-12-05 21:07:50,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:50,406 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:07:50,406 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:07:50,428 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-05 21:07:50,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:07:50,611 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:07:50,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:07:50,612 INFO L85 PathProgramCache]: Analyzing trace with hash 2141084906, now seen corresponding path program 4 times [2022-12-05 21:07:50,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:07:50,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415063985] [2022-12-05 21:07:50,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:07:50,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:07:50,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:07:50,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:50,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:07:50,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415063985] [2022-12-05 21:07:50,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415063985] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:07:50,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394300469] [2022-12-05 21:07:50,688 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 21:07:50,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:07:50,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:07:50,690 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) [2022-12-05 21:07:50,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-05 21:07:50,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 21:07:50,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:07:50,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-05 21:07:50,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:07:50,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:50,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:07:50,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:50,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394300469] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:07:50,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:07:50,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-12-05 21:07:50,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101764505] [2022-12-05 21:07:50,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:07:50,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-05 21:07:50,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:07:50,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-05 21:07:50,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-05 21:07:50,809 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:07:50,809 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 35 transitions, 292 flow. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:50,809 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:07:50,809 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:07:50,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:07:50,898 INFO L130 PetriNetUnfolder]: 114/203 cut-off events. [2022-12-05 21:07:50,898 INFO L131 PetriNetUnfolder]: For 606/606 co-relation queries the response was YES. [2022-12-05 21:07:50,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 939 conditions, 203 events. 114/203 cut-off events. For 606/606 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 591 event pairs, 37 based on Foata normal form. 6/191 useless extension candidates. Maximal degree in co-relation 918. Up to 153 conditions per place. [2022-12-05 21:07:50,900 INFO L137 encePairwiseOnDemand]: 10/15 looper letters, 33 selfloop transitions, 12 changer transitions 0/45 dead transitions. [2022-12-05 21:07:50,900 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 45 transitions, 415 flow [2022-12-05 21:07:50,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-05 21:07:50,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-05 21:07:50,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 32 transitions. [2022-12-05 21:07:50,900 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4266666666666667 [2022-12-05 21:07:50,900 INFO L175 Difference]: Start difference. First operand has 52 places, 35 transitions, 292 flow. Second operand 5 states and 32 transitions. [2022-12-05 21:07:50,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 45 transitions, 415 flow [2022-12-05 21:07:50,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 45 transitions, 399 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-12-05 21:07:50,903 INFO L231 Difference]: Finished difference. Result has 53 places, 34 transitions, 289 flow [2022-12-05 21:07:50,903 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=289, PETRI_PLACES=53, PETRI_TRANSITIONS=34} [2022-12-05 21:07:50,903 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 33 predicate places. [2022-12-05 21:07:50,903 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 34 transitions, 289 flow [2022-12-05 21:07:50,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:50,903 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:07:50,903 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:07:50,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-05 21:07:51,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-05 21:07:51,108 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:07:51,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:07:51,108 INFO L85 PathProgramCache]: Analyzing trace with hash 2112141825, now seen corresponding path program 5 times [2022-12-05 21:07:51,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:07:51,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522706375] [2022-12-05 21:07:51,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:07:51,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:07:51,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:07:51,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:51,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:07:51,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522706375] [2022-12-05 21:07:51,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522706375] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:07:51,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375791243] [2022-12-05 21:07:51,144 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 21:07:51,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:07:51,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:07:51,145 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) [2022-12-05 21:07:51,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-05 21:07:51,229 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:07:51,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:07:51,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-05 21:07:51,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:07:51,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:51,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:07:51,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:51,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375791243] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:07:51,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:07:51,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-12-05 21:07:51,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250739571] [2022-12-05 21:07:51,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:07:51,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-05 21:07:51,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:07:51,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-05 21:07:51,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-05 21:07:51,270 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:07:51,270 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 34 transitions, 289 flow. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:51,270 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:07:51,270 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:07:51,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:07:51,381 INFO L130 PetriNetUnfolder]: 110/193 cut-off events. [2022-12-05 21:07:51,381 INFO L131 PetriNetUnfolder]: For 618/618 co-relation queries the response was YES. [2022-12-05 21:07:51,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 921 conditions, 193 events. 110/193 cut-off events. For 618/618 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 567 event pairs, 9 based on Foata normal form. 4/181 useless extension candidates. Maximal degree in co-relation 900. Up to 86 conditions per place. [2022-12-05 21:07:51,382 INFO L137 encePairwiseOnDemand]: 10/15 looper letters, 37 selfloop transitions, 17 changer transitions 0/54 dead transitions. [2022-12-05 21:07:51,382 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 54 transitions, 482 flow [2022-12-05 21:07:51,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-05 21:07:51,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-05 21:07:51,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 44 transitions. [2022-12-05 21:07:51,383 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2022-12-05 21:07:51,383 INFO L175 Difference]: Start difference. First operand has 53 places, 34 transitions, 289 flow. Second operand 8 states and 44 transitions. [2022-12-05 21:07:51,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 54 transitions, 482 flow [2022-12-05 21:07:51,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 54 transitions, 434 flow, removed 3 selfloop flow, removed 7 redundant places. [2022-12-05 21:07:51,385 INFO L231 Difference]: Finished difference. Result has 52 places, 35 transitions, 285 flow [2022-12-05 21:07:51,385 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=285, PETRI_PLACES=52, PETRI_TRANSITIONS=35} [2022-12-05 21:07:51,386 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 32 predicate places. [2022-12-05 21:07:51,386 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 35 transitions, 285 flow [2022-12-05 21:07:51,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:51,386 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:07:51,386 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:07:51,392 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-05 21:07:51,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:07:51,590 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:07:51,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:07:51,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1649219547, now seen corresponding path program 1 times [2022-12-05 21:07:51,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:07:51,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663671940] [2022-12-05 21:07:51,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:07:51,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:07:51,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:07:51,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:51,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:07:51,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663671940] [2022-12-05 21:07:51,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663671940] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:07:51,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659748529] [2022-12-05 21:07:51,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:07:51,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:07:51,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:07:51,915 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) [2022-12-05 21:07:51,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-05 21:07:51,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:07:51,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-05 21:07:51,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:07:52,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:52,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:07:52,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:52,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659748529] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:07:52,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:07:52,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-12-05 21:07:52,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027591696] [2022-12-05 21:07:52,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:07:52,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-05 21:07:52,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:07:52,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-05 21:07:52,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-12-05 21:07:52,187 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 15 [2022-12-05 21:07:52,187 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 35 transitions, 285 flow. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:52,187 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:07:52,187 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 15 [2022-12-05 21:07:52,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:07:52,327 INFO L130 PetriNetUnfolder]: 133/239 cut-off events. [2022-12-05 21:07:52,327 INFO L131 PetriNetUnfolder]: For 619/633 co-relation queries the response was YES. [2022-12-05 21:07:52,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1071 conditions, 239 events. 133/239 cut-off events. For 619/633 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 821 event pairs, 6 based on Foata normal form. 11/242 useless extension candidates. Maximal degree in co-relation 1052. Up to 168 conditions per place. [2022-12-05 21:07:52,330 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 36 selfloop transitions, 17 changer transitions 5/64 dead transitions. [2022-12-05 21:07:52,330 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 64 transitions, 525 flow [2022-12-05 21:07:52,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-05 21:07:52,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-05 21:07:52,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 54 transitions. [2022-12-05 21:07:52,331 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5142857142857142 [2022-12-05 21:07:52,331 INFO L175 Difference]: Start difference. First operand has 52 places, 35 transitions, 285 flow. Second operand 7 states and 54 transitions. [2022-12-05 21:07:52,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 64 transitions, 525 flow [2022-12-05 21:07:52,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 64 transitions, 476 flow, removed 2 selfloop flow, removed 6 redundant places. [2022-12-05 21:07:52,334 INFO L231 Difference]: Finished difference. Result has 55 places, 45 transitions, 376 flow [2022-12-05 21:07:52,334 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=376, PETRI_PLACES=55, PETRI_TRANSITIONS=45} [2022-12-05 21:07:52,335 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 35 predicate places. [2022-12-05 21:07:52,335 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 45 transitions, 376 flow [2022-12-05 21:07:52,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:52,335 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:07:52,335 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:07:52,344 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-05 21:07:52,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:07:52,544 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:07:52,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:07:52,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1221120503, now seen corresponding path program 2 times [2022-12-05 21:07:52,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:07:52,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460354722] [2022-12-05 21:07:52,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:07:52,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:07:52,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:07:52,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:52,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:07:52,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460354722] [2022-12-05 21:07:52,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460354722] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:07:52,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995086473] [2022-12-05 21:07:52,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 21:07:52,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:07:52,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:07:52,770 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) [2022-12-05 21:07:52,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-05 21:07:52,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:07:52,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:07:52,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-05 21:07:52,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:07:52,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:52,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:07:53,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:53,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995086473] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:07:53,010 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:07:53,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-12-05 21:07:53,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602708876] [2022-12-05 21:07:53,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:07:53,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-05 21:07:53,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:07:53,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-05 21:07:53,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-12-05 21:07:53,012 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 15 [2022-12-05 21:07:53,013 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 45 transitions, 376 flow. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:53,013 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:07:53,013 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 15 [2022-12-05 21:07:53,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:07:53,177 INFO L130 PetriNetUnfolder]: 145/265 cut-off events. [2022-12-05 21:07:53,177 INFO L131 PetriNetUnfolder]: For 838/864 co-relation queries the response was YES. [2022-12-05 21:07:53,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1265 conditions, 265 events. 145/265 cut-off events. For 838/864 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 963 event pairs, 8 based on Foata normal form. 11/268 useless extension candidates. Maximal degree in co-relation 1244. Up to 172 conditions per place. [2022-12-05 21:07:53,179 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 40 selfloop transitions, 20 changer transitions 5/71 dead transitions. [2022-12-05 21:07:53,179 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 71 transitions, 610 flow [2022-12-05 21:07:53,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-05 21:07:53,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-05 21:07:53,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 59 transitions. [2022-12-05 21:07:53,180 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5619047619047619 [2022-12-05 21:07:53,180 INFO L175 Difference]: Start difference. First operand has 55 places, 45 transitions, 376 flow. Second operand 7 states and 59 transitions. [2022-12-05 21:07:53,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 71 transitions, 610 flow [2022-12-05 21:07:53,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 71 transitions, 579 flow, removed 12 selfloop flow, removed 2 redundant places. [2022-12-05 21:07:53,183 INFO L231 Difference]: Finished difference. Result has 61 places, 49 transitions, 447 flow [2022-12-05 21:07:53,183 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=447, PETRI_PLACES=61, PETRI_TRANSITIONS=49} [2022-12-05 21:07:53,183 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 41 predicate places. [2022-12-05 21:07:53,183 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 49 transitions, 447 flow [2022-12-05 21:07:53,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:53,184 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:07:53,184 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:07:53,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-05 21:07:53,388 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,SelfDestructingSolverStorable12 [2022-12-05 21:07:53,389 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:07:53,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:07:53,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1063550797, now seen corresponding path program 3 times [2022-12-05 21:07:53,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:07:53,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588635703] [2022-12-05 21:07:53,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:07:53,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:07:53,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:07:53,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:53,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:07:53,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588635703] [2022-12-05 21:07:53,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588635703] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:07:53,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258522225] [2022-12-05 21:07:53,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 21:07:53,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:07:53,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:07:53,608 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) [2022-12-05 21:07:53,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-05 21:07:53,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-05 21:07:53,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:07:53,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-05 21:07:53,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:07:53,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:53,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:07:53,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:53,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258522225] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:07:53,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:07:53,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2022-12-05 21:07:53,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482264657] [2022-12-05 21:07:53,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:07:53,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-05 21:07:53,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:07:53,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-05 21:07:53,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-12-05 21:07:53,885 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 15 [2022-12-05 21:07:53,885 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 49 transitions, 447 flow. Second operand has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:53,885 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:07:53,885 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 15 [2022-12-05 21:07:53,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:07:54,048 INFO L130 PetriNetUnfolder]: 142/256 cut-off events. [2022-12-05 21:07:54,049 INFO L131 PetriNetUnfolder]: For 1189/1213 co-relation queries the response was YES. [2022-12-05 21:07:54,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1317 conditions, 256 events. 142/256 cut-off events. For 1189/1213 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 904 event pairs, 8 based on Foata normal form. 9/257 useless extension candidates. Maximal degree in co-relation 1293. Up to 172 conditions per place. [2022-12-05 21:07:54,050 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 36 selfloop transitions, 21 changer transitions 5/68 dead transitions. [2022-12-05 21:07:54,051 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 68 transitions, 644 flow [2022-12-05 21:07:54,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-05 21:07:54,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-05 21:07:54,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 55 transitions. [2022-12-05 21:07:54,051 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2022-12-05 21:07:54,051 INFO L175 Difference]: Start difference. First operand has 61 places, 49 transitions, 447 flow. Second operand 7 states and 55 transitions. [2022-12-05 21:07:54,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 68 transitions, 644 flow [2022-12-05 21:07:54,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 68 transitions, 586 flow, removed 20 selfloop flow, removed 3 redundant places. [2022-12-05 21:07:54,055 INFO L231 Difference]: Finished difference. Result has 66 places, 51 transitions, 479 flow [2022-12-05 21:07:54,055 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=479, PETRI_PLACES=66, PETRI_TRANSITIONS=51} [2022-12-05 21:07:54,056 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 46 predicate places. [2022-12-05 21:07:54,056 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 51 transitions, 479 flow [2022-12-05 21:07:54,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:54,056 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:07:54,056 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:07:54,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-05 21:07:54,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-05 21:07:54,261 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:07:54,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:07:54,261 INFO L85 PathProgramCache]: Analyzing trace with hash -581568449, now seen corresponding path program 4 times [2022-12-05 21:07:54,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:07:54,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896689897] [2022-12-05 21:07:54,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:07:54,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:07:54,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:07:54,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:54,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:07:54,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896689897] [2022-12-05 21:07:54,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896689897] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:07:54,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072279472] [2022-12-05 21:07:54,472 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 21:07:54,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:07:54,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:07:54,474 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) [2022-12-05 21:07:54,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-05 21:07:54,584 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 21:07:54,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:07:54,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-05 21:07:54,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:07:54,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:54,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:07:54,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:54,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072279472] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:07:54,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:07:54,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-12-05 21:07:54,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150124909] [2022-12-05 21:07:54,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:07:54,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-05 21:07:54,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:07:54,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-05 21:07:54,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-12-05 21:07:54,773 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 15 [2022-12-05 21:07:54,773 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 51 transitions, 479 flow. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 12 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:54,773 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:07:54,773 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 15 [2022-12-05 21:07:54,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:07:54,935 INFO L130 PetriNetUnfolder]: 166/298 cut-off events. [2022-12-05 21:07:54,935 INFO L131 PetriNetUnfolder]: For 1434/1458 co-relation queries the response was YES. [2022-12-05 21:07:54,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1594 conditions, 298 events. 166/298 cut-off events. For 1434/1458 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1108 event pairs, 10 based on Foata normal form. 9/299 useless extension candidates. Maximal degree in co-relation 1567. Up to 244 conditions per place. [2022-12-05 21:07:54,937 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 44 selfloop transitions, 17 changer transitions 5/72 dead transitions. [2022-12-05 21:07:54,937 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 72 transitions, 737 flow [2022-12-05 21:07:54,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-05 21:07:54,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-05 21:07:54,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 46 transitions. [2022-12-05 21:07:54,938 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2022-12-05 21:07:54,938 INFO L175 Difference]: Start difference. First operand has 66 places, 51 transitions, 479 flow. Second operand 7 states and 46 transitions. [2022-12-05 21:07:54,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 72 transitions, 737 flow [2022-12-05 21:07:54,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 72 transitions, 688 flow, removed 10 selfloop flow, removed 4 redundant places. [2022-12-05 21:07:54,944 INFO L231 Difference]: Finished difference. Result has 70 places, 61 transitions, 588 flow [2022-12-05 21:07:54,945 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=588, PETRI_PLACES=70, PETRI_TRANSITIONS=61} [2022-12-05 21:07:54,945 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 50 predicate places. [2022-12-05 21:07:54,945 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 61 transitions, 588 flow [2022-12-05 21:07:54,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 12 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:54,946 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:07:54,947 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:07:54,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-05 21:07:55,151 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,SelfDestructingSolverStorable14 [2022-12-05 21:07:55,151 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:07:55,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:07:55,151 INFO L85 PathProgramCache]: Analyzing trace with hash 427974603, now seen corresponding path program 5 times [2022-12-05 21:07:55,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:07:55,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675538398] [2022-12-05 21:07:55,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:07:55,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:07:55,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:07:55,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:55,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:07:55,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675538398] [2022-12-05 21:07:55,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675538398] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:07:55,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578657343] [2022-12-05 21:07:55,343 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 21:07:55,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:07:55,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:07:55,344 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) [2022-12-05 21:07:55,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-05 21:07:55,422 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-05 21:07:55,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:07:55,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-05 21:07:55,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:07:55,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:55,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:07:55,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:55,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578657343] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:07:55,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:07:55,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-12-05 21:07:55,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570432035] [2022-12-05 21:07:55,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:07:55,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-05 21:07:55,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:07:55,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-05 21:07:55,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-12-05 21:07:55,584 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 15 [2022-12-05 21:07:55,584 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 61 transitions, 588 flow. Second operand has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:55,584 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:07:55,584 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 15 [2022-12-05 21:07:55,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:07:55,719 INFO L130 PetriNetUnfolder]: 180/326 cut-off events. [2022-12-05 21:07:55,719 INFO L131 PetriNetUnfolder]: For 1744/1768 co-relation queries the response was YES. [2022-12-05 21:07:55,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1817 conditions, 326 events. 180/326 cut-off events. For 1744/1768 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1262 event pairs, 10 based on Foata normal form. 9/327 useless extension candidates. Maximal degree in co-relation 1788. Up to 248 conditions per place. [2022-12-05 21:07:55,721 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 50 selfloop transitions, 20 changer transitions 5/81 dead transitions. [2022-12-05 21:07:55,721 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 81 transitions, 851 flow [2022-12-05 21:07:55,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-05 21:07:55,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-05 21:07:55,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 53 transitions. [2022-12-05 21:07:55,722 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5047619047619047 [2022-12-05 21:07:55,722 INFO L175 Difference]: Start difference. First operand has 70 places, 61 transitions, 588 flow. Second operand 7 states and 53 transitions. [2022-12-05 21:07:55,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 81 transitions, 851 flow [2022-12-05 21:07:55,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 81 transitions, 810 flow, removed 17 selfloop flow, removed 2 redundant places. [2022-12-05 21:07:55,727 INFO L231 Difference]: Finished difference. Result has 76 places, 65 transitions, 665 flow [2022-12-05 21:07:55,727 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=549, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=665, PETRI_PLACES=76, PETRI_TRANSITIONS=65} [2022-12-05 21:07:55,728 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 56 predicate places. [2022-12-05 21:07:55,728 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 65 transitions, 665 flow [2022-12-05 21:07:55,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:55,729 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:07:55,729 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:07:55,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-05 21:07:55,933 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,SelfDestructingSolverStorable15 [2022-12-05 21:07:55,933 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:07:55,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:07:55,934 INFO L85 PathProgramCache]: Analyzing trace with hash -582757741, now seen corresponding path program 6 times [2022-12-05 21:07:55,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:07:55,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880761738] [2022-12-05 21:07:55,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:07:55,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:07:55,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:07:56,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:56,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:07:56,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880761738] [2022-12-05 21:07:56,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880761738] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:07:56,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870062760] [2022-12-05 21:07:56,123 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 21:07:56,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:07:56,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:07:56,134 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) [2022-12-05 21:07:56,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-05 21:07:56,244 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-05 21:07:56,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:07:56,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-05 21:07:56,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:07:56,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:56,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:07:56,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:56,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870062760] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:07:56,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:07:56,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-12-05 21:07:56,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884252848] [2022-12-05 21:07:56,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:07:56,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-05 21:07:56,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:07:56,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-05 21:07:56,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-12-05 21:07:56,428 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 15 [2022-12-05 21:07:56,428 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 65 transitions, 665 flow. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:56,428 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:07:56,428 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 15 [2022-12-05 21:07:56,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:07:56,574 INFO L130 PetriNetUnfolder]: 177/317 cut-off events. [2022-12-05 21:07:56,575 INFO L131 PetriNetUnfolder]: For 2067/2091 co-relation queries the response was YES. [2022-12-05 21:07:56,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1843 conditions, 317 events. 177/317 cut-off events. For 2067/2091 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1211 event pairs, 10 based on Foata normal form. 9/318 useless extension candidates. Maximal degree in co-relation 1811. Up to 248 conditions per place. [2022-12-05 21:07:56,577 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 48 selfloop transitions, 21 changer transitions 5/80 dead transitions. [2022-12-05 21:07:56,577 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 80 transitions, 888 flow [2022-12-05 21:07:56,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-05 21:07:56,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-05 21:07:56,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 51 transitions. [2022-12-05 21:07:56,578 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2022-12-05 21:07:56,578 INFO L175 Difference]: Start difference. First operand has 76 places, 65 transitions, 665 flow. Second operand 7 states and 51 transitions. [2022-12-05 21:07:56,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 80 transitions, 888 flow [2022-12-05 21:07:56,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 80 transitions, 808 flow, removed 31 selfloop flow, removed 3 redundant places. [2022-12-05 21:07:56,584 INFO L231 Difference]: Finished difference. Result has 81 places, 67 transitions, 685 flow [2022-12-05 21:07:56,584 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=605, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=685, PETRI_PLACES=81, PETRI_TRANSITIONS=67} [2022-12-05 21:07:56,584 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 61 predicate places. [2022-12-05 21:07:56,584 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 67 transitions, 685 flow [2022-12-05 21:07:56,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:56,584 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:07:56,584 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:07:56,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-05 21:07:56,788 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,SelfDestructingSolverStorable16 [2022-12-05 21:07:56,789 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:07:56,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:07:56,789 INFO L85 PathProgramCache]: Analyzing trace with hash -2000375818, now seen corresponding path program 7 times [2022-12-05 21:07:56,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:07:56,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630444585] [2022-12-05 21:07:56,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:07:56,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:07:56,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:07:56,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:56,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:07:56,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630444585] [2022-12-05 21:07:56,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630444585] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:07:56,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658495926] [2022-12-05 21:07:56,840 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-05 21:07:56,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:07:56,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:07:56,856 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) [2022-12-05 21:07:56,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-05 21:07:56,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:07:56,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-05 21:07:56,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:07:56,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:56,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:07:56,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:56,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658495926] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:07:56,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:07:56,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-12-05 21:07:56,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756883080] [2022-12-05 21:07:56,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:07:56,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-05 21:07:56,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:07:56,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-05 21:07:56,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-12-05 21:07:56,997 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:07:56,997 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 67 transitions, 685 flow. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:56,997 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:07:56,997 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:07:56,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:07:57,175 INFO L130 PetriNetUnfolder]: 214/385 cut-off events. [2022-12-05 21:07:57,176 INFO L131 PetriNetUnfolder]: For 2318/2318 co-relation queries the response was YES. [2022-12-05 21:07:57,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2180 conditions, 385 events. 214/385 cut-off events. For 2318/2318 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1526 event pairs, 31 based on Foata normal form. 4/389 useless extension candidates. Maximal degree in co-relation 2145. Up to 129 conditions per place. [2022-12-05 21:07:57,178 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 63 selfloop transitions, 43 changer transitions 10/116 dead transitions. [2022-12-05 21:07:57,179 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 116 transitions, 1255 flow [2022-12-05 21:07:57,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-05 21:07:57,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-05 21:07:57,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 62 transitions. [2022-12-05 21:07:57,179 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.37575757575757573 [2022-12-05 21:07:57,179 INFO L175 Difference]: Start difference. First operand has 81 places, 67 transitions, 685 flow. Second operand 11 states and 62 transitions. [2022-12-05 21:07:57,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 116 transitions, 1255 flow [2022-12-05 21:07:57,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 116 transitions, 1190 flow, removed 17 selfloop flow, removed 4 redundant places. [2022-12-05 21:07:57,193 INFO L231 Difference]: Finished difference. Result has 91 places, 80 transitions, 924 flow [2022-12-05 21:07:57,194 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=630, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=924, PETRI_PLACES=91, PETRI_TRANSITIONS=80} [2022-12-05 21:07:57,194 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 71 predicate places. [2022-12-05 21:07:57,194 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 80 transitions, 924 flow [2022-12-05 21:07:57,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:57,194 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:07:57,194 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:07:57,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-05 21:07:57,399 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,SelfDestructingSolverStorable17 [2022-12-05 21:07:57,399 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:07:57,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:07:57,399 INFO L85 PathProgramCache]: Analyzing trace with hash 2099219380, now seen corresponding path program 8 times [2022-12-05 21:07:57,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:07:57,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110181030] [2022-12-05 21:07:57,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:07:57,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:07:57,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:07:57,462 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:57,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:07:57,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110181030] [2022-12-05 21:07:57,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110181030] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:07:57,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109443875] [2022-12-05 21:07:57,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 21:07:57,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:07:57,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:07:57,477 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) [2022-12-05 21:07:57,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-05 21:07:57,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:07:57,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:07:57,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-05 21:07:57,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:07:57,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:57,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:07:57,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:57,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109443875] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:07:57,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:07:57,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-12-05 21:07:57,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382382816] [2022-12-05 21:07:57,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:07:57,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-05 21:07:57,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:07:57,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-05 21:07:57,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-12-05 21:07:57,666 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:07:57,666 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 80 transitions, 924 flow. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:57,666 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:07:57,666 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:07:57,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:07:57,940 INFO L130 PetriNetUnfolder]: 249/464 cut-off events. [2022-12-05 21:07:57,940 INFO L131 PetriNetUnfolder]: For 3581/3581 co-relation queries the response was YES. [2022-12-05 21:07:57,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2797 conditions, 464 events. 249/464 cut-off events. For 3581/3581 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 1966 event pairs, 31 based on Foata normal form. 8/472 useless extension candidates. Maximal degree in co-relation 2758. Up to 137 conditions per place. [2022-12-05 21:07:57,944 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 89 selfloop transitions, 64 changer transitions 6/159 dead transitions. [2022-12-05 21:07:57,944 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 159 transitions, 1790 flow [2022-12-05 21:07:57,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-05 21:07:57,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-05 21:07:57,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 96 transitions. [2022-12-05 21:07:57,946 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.35555555555555557 [2022-12-05 21:07:57,946 INFO L175 Difference]: Start difference. First operand has 91 places, 80 transitions, 924 flow. Second operand 18 states and 96 transitions. [2022-12-05 21:07:57,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 159 transitions, 1790 flow [2022-12-05 21:07:57,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 159 transitions, 1672 flow, removed 49 selfloop flow, removed 7 redundant places. [2022-12-05 21:07:57,956 INFO L231 Difference]: Finished difference. Result has 106 places, 101 transitions, 1289 flow [2022-12-05 21:07:57,956 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=858, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1289, PETRI_PLACES=106, PETRI_TRANSITIONS=101} [2022-12-05 21:07:57,956 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 86 predicate places. [2022-12-05 21:07:57,956 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 101 transitions, 1289 flow [2022-12-05 21:07:57,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:57,957 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:07:57,957 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:07:57,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-05 21:07:58,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:07:58,176 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:07:58,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:07:58,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1971226067, now seen corresponding path program 9 times [2022-12-05 21:07:58,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:07:58,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876257626] [2022-12-05 21:07:58,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:07:58,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:07:58,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:07:58,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:58,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:07:58,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876257626] [2022-12-05 21:07:58,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876257626] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:07:58,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992143360] [2022-12-05 21:07:58,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 21:07:58,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:07:58,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:07:58,244 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) [2022-12-05 21:07:58,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-05 21:07:58,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-05 21:07:58,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:07:58,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-05 21:07:58,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:07:58,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:58,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:07:58,405 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:58,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992143360] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:07:58,406 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:07:58,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-12-05 21:07:58,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26786837] [2022-12-05 21:07:58,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:07:58,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-05 21:07:58,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:07:58,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-05 21:07:58,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-12-05 21:07:58,407 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:07:58,407 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 101 transitions, 1289 flow. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:58,407 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:07:58,407 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:07:58,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:07:58,558 INFO L130 PetriNetUnfolder]: 256/471 cut-off events. [2022-12-05 21:07:58,559 INFO L131 PetriNetUnfolder]: For 4234/4234 co-relation queries the response was YES. [2022-12-05 21:07:58,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3070 conditions, 471 events. 256/471 cut-off events. For 4234/4234 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 1962 event pairs, 25 based on Foata normal form. 6/477 useless extension candidates. Maximal degree in co-relation 3030. Up to 200 conditions per place. [2022-12-05 21:07:58,562 INFO L137 encePairwiseOnDemand]: 10/15 looper letters, 90 selfloop transitions, 41 changer transitions 0/131 dead transitions. [2022-12-05 21:07:58,562 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 131 transitions, 1778 flow [2022-12-05 21:07:58,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-05 21:07:58,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-05 21:07:58,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 53 transitions. [2022-12-05 21:07:58,563 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5047619047619047 [2022-12-05 21:07:58,563 INFO L175 Difference]: Start difference. First operand has 106 places, 101 transitions, 1289 flow. Second operand 7 states and 53 transitions. [2022-12-05 21:07:58,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 131 transitions, 1778 flow [2022-12-05 21:07:58,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 131 transitions, 1648 flow, removed 25 selfloop flow, removed 7 redundant places. [2022-12-05 21:07:58,577 INFO L231 Difference]: Finished difference. Result has 106 places, 103 transitions, 1282 flow [2022-12-05 21:07:58,577 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=1161, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1282, PETRI_PLACES=106, PETRI_TRANSITIONS=103} [2022-12-05 21:07:58,577 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 86 predicate places. [2022-12-05 21:07:58,577 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 103 transitions, 1282 flow [2022-12-05 21:07:58,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:58,577 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:07:58,577 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:07:58,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-12-05 21:07:58,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:07:58,782 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:07:58,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:07:58,782 INFO L85 PathProgramCache]: Analyzing trace with hash -626002001, now seen corresponding path program 10 times [2022-12-05 21:07:58,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:07:58,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664822172] [2022-12-05 21:07:58,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:07:58,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:07:58,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:07:58,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:58,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:07:58,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664822172] [2022-12-05 21:07:58,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664822172] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:07:58,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052002580] [2022-12-05 21:07:58,829 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 21:07:58,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:07:58,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:07:58,848 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) [2022-12-05 21:07:58,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-05 21:07:58,918 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 21:07:58,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:07:58,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-05 21:07:58,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:07:58,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:58,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:07:58,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:58,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052002580] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:07:58,988 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:07:58,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-12-05 21:07:58,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395613711] [2022-12-05 21:07:58,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:07:58,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-05 21:07:58,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:07:58,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-05 21:07:58,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-12-05 21:07:58,989 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:07:58,989 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 103 transitions, 1282 flow. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:58,989 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:07:58,989 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:07:58,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:07:59,234 INFO L130 PetriNetUnfolder]: 315/576 cut-off events. [2022-12-05 21:07:59,235 INFO L131 PetriNetUnfolder]: For 7124/7124 co-relation queries the response was YES. [2022-12-05 21:07:59,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3968 conditions, 576 events. 315/576 cut-off events. For 7124/7124 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2507 event pairs, 23 based on Foata normal form. 28/604 useless extension candidates. Maximal degree in co-relation 3926. Up to 369 conditions per place. [2022-12-05 21:07:59,240 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 112 selfloop transitions, 41 changer transitions 0/153 dead transitions. [2022-12-05 21:07:59,240 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 153 transitions, 2093 flow [2022-12-05 21:07:59,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-05 21:07:59,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-05 21:07:59,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 73 transitions. [2022-12-05 21:07:59,240 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.44242424242424244 [2022-12-05 21:07:59,240 INFO L175 Difference]: Start difference. First operand has 106 places, 103 transitions, 1282 flow. Second operand 11 states and 73 transitions. [2022-12-05 21:07:59,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 153 transitions, 2093 flow [2022-12-05 21:07:59,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 153 transitions, 1933 flow, removed 43 selfloop flow, removed 4 redundant places. [2022-12-05 21:07:59,258 INFO L231 Difference]: Finished difference. Result has 117 places, 117 transitions, 1545 flow [2022-12-05 21:07:59,258 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=1182, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1545, PETRI_PLACES=117, PETRI_TRANSITIONS=117} [2022-12-05 21:07:59,258 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 97 predicate places. [2022-12-05 21:07:59,258 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 117 transitions, 1545 flow [2022-12-05 21:07:59,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:59,258 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:07:59,258 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:07:59,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-12-05 21:07:59,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:07:59,463 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:07:59,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:07:59,464 INFO L85 PathProgramCache]: Analyzing trace with hash -366514173, now seen corresponding path program 11 times [2022-12-05 21:07:59,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:07:59,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215802893] [2022-12-05 21:07:59,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:07:59,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:07:59,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:07:59,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:59,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:07:59,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215802893] [2022-12-05 21:07:59,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215802893] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:07:59,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024214946] [2022-12-05 21:07:59,534 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 21:07:59,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:07:59,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:07:59,547 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) [2022-12-05 21:07:59,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-05 21:07:59,635 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-05 21:07:59,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:07:59,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-05 21:07:59,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:07:59,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:59,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:07:59,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:59,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024214946] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:07:59,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:07:59,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-12-05 21:07:59,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866868972] [2022-12-05 21:07:59,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:07:59,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-05 21:07:59,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:07:59,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-05 21:07:59,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-12-05 21:07:59,691 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:07:59,691 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 117 transitions, 1545 flow. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:59,691 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:07:59,691 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:07:59,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:08:00,013 INFO L130 PetriNetUnfolder]: 397/744 cut-off events. [2022-12-05 21:08:00,013 INFO L131 PetriNetUnfolder]: For 11735/11735 co-relation queries the response was YES. [2022-12-05 21:08:00,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5408 conditions, 744 events. 397/744 cut-off events. For 11735/11735 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3568 event pairs, 7 based on Foata normal form. 10/754 useless extension candidates. Maximal degree in co-relation 5362. Up to 213 conditions per place. [2022-12-05 21:08:00,021 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 120 selfloop transitions, 102 changer transitions 1/223 dead transitions. [2022-12-05 21:08:00,021 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 223 transitions, 3239 flow [2022-12-05 21:08:00,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-05 21:08:00,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-05 21:08:00,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 115 transitions. [2022-12-05 21:08:00,022 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2022-12-05 21:08:00,022 INFO L175 Difference]: Start difference. First operand has 117 places, 117 transitions, 1545 flow. Second operand 20 states and 115 transitions. [2022-12-05 21:08:00,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 223 transitions, 3239 flow [2022-12-05 21:08:00,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 223 transitions, 2897 flow, removed 164 selfloop flow, removed 2 redundant places. [2022-12-05 21:08:00,053 INFO L231 Difference]: Finished difference. Result has 141 places, 168 transitions, 2531 flow [2022-12-05 21:08:00,053 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=1365, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2531, PETRI_PLACES=141, PETRI_TRANSITIONS=168} [2022-12-05 21:08:00,053 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 121 predicate places. [2022-12-05 21:08:00,053 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 168 transitions, 2531 flow [2022-12-05 21:08:00,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:00,053 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:08:00,053 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:08:00,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-05 21:08:00,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:00,274 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:08:00,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:08:00,275 INFO L85 PathProgramCache]: Analyzing trace with hash 519800216, now seen corresponding path program 12 times [2022-12-05 21:08:00,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:08:00,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270318058] [2022-12-05 21:08:00,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:08:00,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:08:00,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:08:00,325 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:00,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:08:00,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270318058] [2022-12-05 21:08:00,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270318058] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:08:00,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119915452] [2022-12-05 21:08:00,326 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 21:08:00,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:00,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:08:00,327 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) [2022-12-05 21:08:00,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-05 21:08:00,396 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-05 21:08:00,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:08:00,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-05 21:08:00,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:08:00,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:00,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:08:00,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:00,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119915452] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:08:00,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:08:00,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-12-05 21:08:00,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698021232] [2022-12-05 21:08:00,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:08:00,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-05 21:08:00,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:08:00,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-05 21:08:00,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-12-05 21:08:00,482 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:08:00,482 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 168 transitions, 2531 flow. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:00,482 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:08:00,482 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:08:00,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:08:00,782 INFO L130 PetriNetUnfolder]: 477/914 cut-off events. [2022-12-05 21:08:00,782 INFO L131 PetriNetUnfolder]: For 17033/17033 co-relation queries the response was YES. [2022-12-05 21:08:00,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6978 conditions, 914 events. 477/914 cut-off events. For 17033/17033 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4683 event pairs, 98 based on Foata normal form. 8/918 useless extension candidates. Maximal degree in co-relation 6924. Up to 464 conditions per place. [2022-12-05 21:08:00,790 INFO L137 encePairwiseOnDemand]: 10/15 looper letters, 186 selfloop transitions, 65 changer transitions 0/251 dead transitions. [2022-12-05 21:08:00,791 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 251 transitions, 4229 flow [2022-12-05 21:08:00,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-05 21:08:00,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-05 21:08:00,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 91 transitions. [2022-12-05 21:08:00,791 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2022-12-05 21:08:00,791 INFO L175 Difference]: Start difference. First operand has 141 places, 168 transitions, 2531 flow. Second operand 13 states and 91 transitions. [2022-12-05 21:08:00,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 251 transitions, 4229 flow [2022-12-05 21:08:00,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 251 transitions, 3227 flow, removed 451 selfloop flow, removed 8 redundant places. [2022-12-05 21:08:00,850 INFO L231 Difference]: Finished difference. Result has 151 places, 186 transitions, 2452 flow [2022-12-05 21:08:00,851 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=1912, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2452, PETRI_PLACES=151, PETRI_TRANSITIONS=186} [2022-12-05 21:08:00,851 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 131 predicate places. [2022-12-05 21:08:00,851 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 186 transitions, 2452 flow [2022-12-05 21:08:00,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:00,851 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:08:00,851 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:08:00,865 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-05 21:08:01,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:01,056 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:08:01,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:08:01,057 INFO L85 PathProgramCache]: Analyzing trace with hash -554708190, now seen corresponding path program 13 times [2022-12-05 21:08:01,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:08:01,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353461833] [2022-12-05 21:08:01,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:08:01,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:08:01,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:08:01,107 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:01,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:08:01,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353461833] [2022-12-05 21:08:01,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353461833] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:08:01,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489572610] [2022-12-05 21:08:01,107 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-05 21:08:01,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:01,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:08:01,109 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) [2022-12-05 21:08:01,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-05 21:08:01,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:08:01,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-05 21:08:01,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:08:01,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:01,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:08:01,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:01,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489572610] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:08:01,274 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:08:01,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-12-05 21:08:01,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696756906] [2022-12-05 21:08:01,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:08:01,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-05 21:08:01,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:08:01,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-05 21:08:01,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-12-05 21:08:01,276 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:08:01,277 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 186 transitions, 2452 flow. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:01,277 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:08:01,277 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:08:01,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:08:01,621 INFO L130 PetriNetUnfolder]: 466/897 cut-off events. [2022-12-05 21:08:01,621 INFO L131 PetriNetUnfolder]: For 11212/11212 co-relation queries the response was YES. [2022-12-05 21:08:01,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5761 conditions, 897 events. 466/897 cut-off events. For 11212/11212 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4583 event pairs, 70 based on Foata normal form. 16/913 useless extension candidates. Maximal degree in co-relation 5704. Up to 362 conditions per place. [2022-12-05 21:08:01,667 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 167 selfloop transitions, 89 changer transitions 2/258 dead transitions. [2022-12-05 21:08:01,667 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 258 transitions, 3546 flow [2022-12-05 21:08:01,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-05 21:08:01,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-05 21:08:01,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 103 transitions. [2022-12-05 21:08:01,668 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3814814814814815 [2022-12-05 21:08:01,668 INFO L175 Difference]: Start difference. First operand has 151 places, 186 transitions, 2452 flow. Second operand 18 states and 103 transitions. [2022-12-05 21:08:01,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 258 transitions, 3546 flow [2022-12-05 21:08:01,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 258 transitions, 3373 flow, removed 63 selfloop flow, removed 5 redundant places. [2022-12-05 21:08:01,702 INFO L231 Difference]: Finished difference. Result has 165 places, 194 transitions, 2660 flow [2022-12-05 21:08:01,702 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=2234, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2660, PETRI_PLACES=165, PETRI_TRANSITIONS=194} [2022-12-05 21:08:01,702 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 145 predicate places. [2022-12-05 21:08:01,702 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 194 transitions, 2660 flow [2022-12-05 21:08:01,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:01,703 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:08:01,703 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:08:01,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-12-05 21:08:01,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:01,907 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:08:01,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:08:01,912 INFO L85 PathProgramCache]: Analyzing trace with hash -633083615, now seen corresponding path program 14 times [2022-12-05 21:08:01,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:08:01,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124529479] [2022-12-05 21:08:01,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:08:01,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:08:01,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:08:01,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:01,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:08:01,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124529479] [2022-12-05 21:08:01,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124529479] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:08:01,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760002051] [2022-12-05 21:08:01,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 21:08:01,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:01,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:08:01,980 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) [2022-12-05 21:08:01,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-05 21:08:02,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:08:02,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:08:02,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-05 21:08:02,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:08:02,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:02,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:08:02,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:02,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760002051] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:08:02,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:08:02,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-12-05 21:08:02,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622973662] [2022-12-05 21:08:02,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:08:02,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-05 21:08:02,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:08:02,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-05 21:08:02,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-12-05 21:08:02,129 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:08:02,129 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 194 transitions, 2660 flow. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:02,129 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:08:02,129 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:08:02,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:08:02,443 INFO L130 PetriNetUnfolder]: 449/856 cut-off events. [2022-12-05 21:08:02,443 INFO L131 PetriNetUnfolder]: For 10400/10400 co-relation queries the response was YES. [2022-12-05 21:08:02,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5707 conditions, 856 events. 449/856 cut-off events. For 10400/10400 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4333 event pairs, 23 based on Foata normal form. 34/890 useless extension candidates. Maximal degree in co-relation 5648. Up to 433 conditions per place. [2022-12-05 21:08:02,450 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 144 selfloop transitions, 86 changer transitions 0/230 dead transitions. [2022-12-05 21:08:02,450 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 230 transitions, 3327 flow [2022-12-05 21:08:02,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-05 21:08:02,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-05 21:08:02,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 88 transitions. [2022-12-05 21:08:02,451 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2022-12-05 21:08:02,451 INFO L175 Difference]: Start difference. First operand has 165 places, 194 transitions, 2660 flow. Second operand 14 states and 88 transitions. [2022-12-05 21:08:02,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 230 transitions, 3327 flow [2022-12-05 21:08:02,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 230 transitions, 3090 flow, removed 76 selfloop flow, removed 13 redundant places. [2022-12-05 21:08:02,487 INFO L231 Difference]: Finished difference. Result has 164 places, 186 transitions, 2559 flow [2022-12-05 21:08:02,487 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=2270, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2559, PETRI_PLACES=164, PETRI_TRANSITIONS=186} [2022-12-05 21:08:02,488 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 144 predicate places. [2022-12-05 21:08:02,488 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 186 transitions, 2559 flow [2022-12-05 21:08:02,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:02,488 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:08:02,488 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:08:02,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-12-05 21:08:02,692 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,SelfDestructingSolverStorable24 [2022-12-05 21:08:02,692 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:08:02,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:08:02,692 INFO L85 PathProgramCache]: Analyzing trace with hash -747305387, now seen corresponding path program 15 times [2022-12-05 21:08:02,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:08:02,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090788102] [2022-12-05 21:08:02,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:08:02,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:08:02,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:08:02,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:02,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:08:02,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090788102] [2022-12-05 21:08:02,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090788102] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:08:02,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895120986] [2022-12-05 21:08:02,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 21:08:02,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:02,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:08:02,764 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) [2022-12-05 21:08:02,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-05 21:08:02,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-05 21:08:02,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:08:02,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-05 21:08:02,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:08:02,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:02,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:08:02,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:02,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895120986] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:08:02,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:08:02,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-12-05 21:08:02,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909269164] [2022-12-05 21:08:02,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:08:02,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-05 21:08:02,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:08:02,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-05 21:08:02,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-12-05 21:08:02,922 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:08:02,923 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 186 transitions, 2559 flow. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:02,923 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:08:02,923 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:08:02,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:08:03,313 INFO L130 PetriNetUnfolder]: 543/1074 cut-off events. [2022-12-05 21:08:03,313 INFO L131 PetriNetUnfolder]: For 13267/13267 co-relation queries the response was YES. [2022-12-05 21:08:03,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7112 conditions, 1074 events. 543/1074 cut-off events. For 13267/13267 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 5955 event pairs, 23 based on Foata normal form. 16/1090 useless extension candidates. Maximal degree in co-relation 7054. Up to 313 conditions per place. [2022-12-05 21:08:03,327 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 134 selfloop transitions, 135 changer transitions 5/274 dead transitions. [2022-12-05 21:08:03,327 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 274 transitions, 4010 flow [2022-12-05 21:08:03,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-05 21:08:03,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-05 21:08:03,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 107 transitions. [2022-12-05 21:08:03,328 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3396825396825397 [2022-12-05 21:08:03,328 INFO L175 Difference]: Start difference. First operand has 164 places, 186 transitions, 2559 flow. Second operand 21 states and 107 transitions. [2022-12-05 21:08:03,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 274 transitions, 4010 flow [2022-12-05 21:08:03,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 274 transitions, 3889 flow, removed 14 selfloop flow, removed 8 redundant places. [2022-12-05 21:08:03,370 INFO L231 Difference]: Finished difference. Result has 182 places, 216 transitions, 3411 flow [2022-12-05 21:08:03,371 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=2409, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3411, PETRI_PLACES=182, PETRI_TRANSITIONS=216} [2022-12-05 21:08:03,371 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 162 predicate places. [2022-12-05 21:08:03,371 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 216 transitions, 3411 flow [2022-12-05 21:08:03,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:03,371 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:08:03,371 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:08:03,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-12-05 21:08:03,575 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,SelfDestructingSolverStorable25 [2022-12-05 21:08:03,575 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:08:03,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:08:03,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1050742881, now seen corresponding path program 16 times [2022-12-05 21:08:03,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:08:03,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782119441] [2022-12-05 21:08:03,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:08:03,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:08:03,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:08:03,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:03,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:08:03,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782119441] [2022-12-05 21:08:03,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782119441] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:08:03,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888071412] [2022-12-05 21:08:03,633 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 21:08:03,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:03,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:08:03,652 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) [2022-12-05 21:08:03,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-05 21:08:03,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 21:08:03,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:08:03,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-05 21:08:03,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:08:03,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:03,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:08:03,819 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:03,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888071412] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:08:03,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:08:03,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-12-05 21:08:03,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630270572] [2022-12-05 21:08:03,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:08:03,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-05 21:08:03,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:08:03,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-05 21:08:03,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-12-05 21:08:03,820 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:08:03,820 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 216 transitions, 3411 flow. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:03,820 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:08:03,820 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:08:03,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:08:04,218 INFO L130 PetriNetUnfolder]: 701/1384 cut-off events. [2022-12-05 21:08:04,218 INFO L131 PetriNetUnfolder]: For 21405/21405 co-relation queries the response was YES. [2022-12-05 21:08:04,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10011 conditions, 1384 events. 701/1384 cut-off events. For 21405/21405 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 8201 event pairs, 31 based on Foata normal form. 24/1408 useless extension candidates. Maximal degree in co-relation 9948. Up to 434 conditions per place. [2022-12-05 21:08:04,227 INFO L137 encePairwiseOnDemand]: 10/15 looper letters, 176 selfloop transitions, 151 changer transitions 0/327 dead transitions. [2022-12-05 21:08:04,227 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 327 transitions, 5527 flow [2022-12-05 21:08:04,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-05 21:08:04,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-05 21:08:04,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 98 transitions. [2022-12-05 21:08:04,228 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.43555555555555553 [2022-12-05 21:08:04,228 INFO L175 Difference]: Start difference. First operand has 182 places, 216 transitions, 3411 flow. Second operand 15 states and 98 transitions. [2022-12-05 21:08:04,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 327 transitions, 5527 flow [2022-12-05 21:08:04,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 327 transitions, 5175 flow, removed 135 selfloop flow, removed 8 redundant places. [2022-12-05 21:08:04,316 INFO L231 Difference]: Finished difference. Result has 190 places, 259 transitions, 4415 flow [2022-12-05 21:08:04,316 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=3022, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=4415, PETRI_PLACES=190, PETRI_TRANSITIONS=259} [2022-12-05 21:08:04,316 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 170 predicate places. [2022-12-05 21:08:04,316 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 259 transitions, 4415 flow [2022-12-05 21:08:04,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:04,317 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:08:04,317 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:08:04,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-12-05 21:08:04,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-05 21:08:04,521 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:08:04,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:08:04,521 INFO L85 PathProgramCache]: Analyzing trace with hash 412559420, now seen corresponding path program 17 times [2022-12-05 21:08:04,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:08:04,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752966788] [2022-12-05 21:08:04,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:08:04,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:08:04,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:08:04,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:04,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:08:04,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752966788] [2022-12-05 21:08:04,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752966788] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:08:04,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574617659] [2022-12-05 21:08:04,572 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 21:08:04,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:04,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:08:04,573 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) [2022-12-05 21:08:04,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-05 21:08:04,642 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:08:04,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:08:04,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-05 21:08:04,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:08:04,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:04,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:08:04,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:04,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574617659] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:08:04,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:08:04,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-12-05 21:08:04,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837938988] [2022-12-05 21:08:04,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:08:04,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-05 21:08:04,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:08:04,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-05 21:08:04,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-12-05 21:08:04,716 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:08:04,716 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 259 transitions, 4415 flow. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:04,716 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:08:04,716 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:08:04,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:08:05,202 INFO L130 PetriNetUnfolder]: 732/1469 cut-off events. [2022-12-05 21:08:05,202 INFO L131 PetriNetUnfolder]: For 26327/26327 co-relation queries the response was YES. [2022-12-05 21:08:05,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11151 conditions, 1469 events. 732/1469 cut-off events. For 26327/26327 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 9037 event pairs, 29 based on Foata normal form. 24/1493 useless extension candidates. Maximal degree in co-relation 11084. Up to 721 conditions per place. [2022-12-05 21:08:05,212 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 231 selfloop transitions, 111 changer transitions 7/349 dead transitions. [2022-12-05 21:08:05,212 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 349 transitions, 6115 flow [2022-12-05 21:08:05,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-05 21:08:05,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-05 21:08:05,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 122 transitions. [2022-12-05 21:08:05,213 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3536231884057971 [2022-12-05 21:08:05,213 INFO L175 Difference]: Start difference. First operand has 190 places, 259 transitions, 4415 flow. Second operand 23 states and 122 transitions. [2022-12-05 21:08:05,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 349 transitions, 6115 flow [2022-12-05 21:08:05,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 349 transitions, 5937 flow, removed 70 selfloop flow, removed 5 redundant places. [2022-12-05 21:08:05,358 INFO L231 Difference]: Finished difference. Result has 216 places, 277 transitions, 5083 flow [2022-12-05 21:08:05,359 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=4226, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=5083, PETRI_PLACES=216, PETRI_TRANSITIONS=277} [2022-12-05 21:08:05,359 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 196 predicate places. [2022-12-05 21:08:05,359 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 277 transitions, 5083 flow [2022-12-05 21:08:05,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:05,359 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:08:05,359 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:08:05,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-12-05 21:08:05,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:05,564 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:08:05,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:08:05,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1247713770, now seen corresponding path program 18 times [2022-12-05 21:08:05,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:08:05,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469383297] [2022-12-05 21:08:05,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:08:05,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:08:05,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:08:05,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:05,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:08:05,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469383297] [2022-12-05 21:08:05,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469383297] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:08:05,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747423373] [2022-12-05 21:08:05,675 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 21:08:05,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:05,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:08:05,676 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) [2022-12-05 21:08:05,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-05 21:08:05,751 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-05 21:08:05,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:08:05,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-05 21:08:05,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:08:05,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:05,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:08:05,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:05,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747423373] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:08:05,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:08:05,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-12-05 21:08:05,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013428077] [2022-12-05 21:08:05,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:08:05,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-05 21:08:05,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:08:05,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-05 21:08:05,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-12-05 21:08:05,806 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:08:05,806 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 277 transitions, 5083 flow. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:05,806 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:08:05,806 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:08:05,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:08:06,162 INFO L130 PetriNetUnfolder]: 783/1562 cut-off events. [2022-12-05 21:08:06,162 INFO L131 PetriNetUnfolder]: For 33089/33089 co-relation queries the response was YES. [2022-12-05 21:08:06,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12671 conditions, 1562 events. 783/1562 cut-off events. For 33089/33089 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 9681 event pairs, 24 based on Foata normal form. 10/1572 useless extension candidates. Maximal degree in co-relation 12595. Up to 1062 conditions per place. [2022-12-05 21:08:06,173 INFO L137 encePairwiseOnDemand]: 10/15 looper letters, 236 selfloop transitions, 90 changer transitions 0/326 dead transitions. [2022-12-05 21:08:06,174 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 326 transitions, 6679 flow [2022-12-05 21:08:06,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-05 21:08:06,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-05 21:08:06,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 47 transitions. [2022-12-05 21:08:06,174 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2022-12-05 21:08:06,174 INFO L175 Difference]: Start difference. First operand has 216 places, 277 transitions, 5083 flow. Second operand 7 states and 47 transitions. [2022-12-05 21:08:06,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 326 transitions, 6679 flow [2022-12-05 21:08:06,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 326 transitions, 5981 flow, removed 250 selfloop flow, removed 11 redundant places. [2022-12-05 21:08:06,322 INFO L231 Difference]: Finished difference. Result has 211 places, 291 transitions, 5180 flow [2022-12-05 21:08:06,322 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=4596, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5180, PETRI_PLACES=211, PETRI_TRANSITIONS=291} [2022-12-05 21:08:06,323 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 191 predicate places. [2022-12-05 21:08:06,323 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 291 transitions, 5180 flow [2022-12-05 21:08:06,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:06,323 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:08:06,323 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:08:06,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-12-05 21:08:06,527 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,SelfDestructingSolverStorable28 [2022-12-05 21:08:06,527 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:08:06,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:08:06,527 INFO L85 PathProgramCache]: Analyzing trace with hash 206548043, now seen corresponding path program 19 times [2022-12-05 21:08:06,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:08:06,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117965134] [2022-12-05 21:08:06,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:08:06,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:08:06,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:08:06,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:06,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:08:06,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117965134] [2022-12-05 21:08:06,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117965134] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:08:06,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946417444] [2022-12-05 21:08:06,571 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-05 21:08:06,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:06,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:08:06,572 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) [2022-12-05 21:08:06,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-05 21:08:06,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:08:06,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-05 21:08:06,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:08:06,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:06,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:08:06,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:06,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946417444] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:08:06,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:08:06,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-12-05 21:08:06,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222407781] [2022-12-05 21:08:06,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:08:06,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-05 21:08:06,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:08:06,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-05 21:08:06,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-12-05 21:08:06,691 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:08:06,691 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 291 transitions, 5180 flow. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:06,691 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:08:06,691 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:08:06,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:08:07,043 INFO L130 PetriNetUnfolder]: 783/1566 cut-off events. [2022-12-05 21:08:07,043 INFO L131 PetriNetUnfolder]: For 33251/33251 co-relation queries the response was YES. [2022-12-05 21:08:07,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12338 conditions, 1566 events. 783/1566 cut-off events. For 33251/33251 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 9767 event pairs, 119 based on Foata normal form. 2/1568 useless extension candidates. Maximal degree in co-relation 12261. Up to 704 conditions per place. [2022-12-05 21:08:07,054 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 203 selfloop transitions, 119 changer transitions 5/327 dead transitions. [2022-12-05 21:08:07,055 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 327 transitions, 6292 flow [2022-12-05 21:08:07,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-05 21:08:07,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-05 21:08:07,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 54 transitions. [2022-12-05 21:08:07,055 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.32727272727272727 [2022-12-05 21:08:07,055 INFO L175 Difference]: Start difference. First operand has 211 places, 291 transitions, 5180 flow. Second operand 11 states and 54 transitions. [2022-12-05 21:08:07,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 327 transitions, 6292 flow [2022-12-05 21:08:07,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 327 transitions, 6154 flow, removed 54 selfloop flow, removed 3 redundant places. [2022-12-05 21:08:07,210 INFO L231 Difference]: Finished difference. Result has 222 places, 298 transitions, 5547 flow [2022-12-05 21:08:07,210 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=5048, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5547, PETRI_PLACES=222, PETRI_TRANSITIONS=298} [2022-12-05 21:08:07,211 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 202 predicate places. [2022-12-05 21:08:07,211 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 298 transitions, 5547 flow [2022-12-05 21:08:07,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:07,211 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:08:07,211 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:08:07,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-12-05 21:08:07,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:07,415 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:08:07,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:08:07,416 INFO L85 PathProgramCache]: Analyzing trace with hash -981892576, now seen corresponding path program 20 times [2022-12-05 21:08:07,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:08:07,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058982124] [2022-12-05 21:08:07,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:08:07,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:08:07,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:08:07,464 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:07,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:08:07,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058982124] [2022-12-05 21:08:07,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058982124] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:08:07,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139057496] [2022-12-05 21:08:07,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 21:08:07,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:07,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:08:07,489 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) [2022-12-05 21:08:07,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-05 21:08:07,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:08:07,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:08:07,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-05 21:08:07,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:08:07,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:07,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:08:07,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:07,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139057496] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:08:07,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:08:07,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-12-05 21:08:07,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534490799] [2022-12-05 21:08:07,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:08:07,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-05 21:08:07,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:08:07,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-05 21:08:07,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-12-05 21:08:07,638 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:08:07,638 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 298 transitions, 5547 flow. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:07,638 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:08:07,638 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:08:07,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:08:08,180 INFO L130 PetriNetUnfolder]: 914/1815 cut-off events. [2022-12-05 21:08:08,181 INFO L131 PetriNetUnfolder]: For 37823/37823 co-relation queries the response was YES. [2022-12-05 21:08:08,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14629 conditions, 1815 events. 914/1815 cut-off events. For 37823/37823 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 11639 event pairs, 54 based on Foata normal form. 36/1851 useless extension candidates. Maximal degree in co-relation 14549. Up to 1368 conditions per place. [2022-12-05 21:08:08,194 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 303 selfloop transitions, 103 changer transitions 0/406 dead transitions. [2022-12-05 21:08:08,194 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 406 transitions, 7762 flow [2022-12-05 21:08:08,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-05 21:08:08,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-12-05 21:08:08,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 94 transitions. [2022-12-05 21:08:08,207 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3686274509803922 [2022-12-05 21:08:08,207 INFO L175 Difference]: Start difference. First operand has 222 places, 298 transitions, 5547 flow. Second operand 17 states and 94 transitions. [2022-12-05 21:08:08,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 406 transitions, 7762 flow [2022-12-05 21:08:08,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 406 transitions, 7480 flow, removed 80 selfloop flow, removed 4 redundant places. [2022-12-05 21:08:08,396 INFO L231 Difference]: Finished difference. Result has 241 places, 353 transitions, 6533 flow [2022-12-05 21:08:08,396 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=5282, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=6533, PETRI_PLACES=241, PETRI_TRANSITIONS=353} [2022-12-05 21:08:08,396 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 221 predicate places. [2022-12-05 21:08:08,396 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 353 transitions, 6533 flow [2022-12-05 21:08:08,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:08,397 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:08:08,397 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:08:08,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-12-05 21:08:08,601 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,SelfDestructingSolverStorable30 [2022-12-05 21:08:08,601 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:08:08,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:08:08,601 INFO L85 PathProgramCache]: Analyzing trace with hash 4139938, now seen corresponding path program 21 times [2022-12-05 21:08:08,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:08:08,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361789556] [2022-12-05 21:08:08,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:08:08,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:08:08,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:08:08,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:08,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:08:08,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361789556] [2022-12-05 21:08:08,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361789556] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:08:08,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938071539] [2022-12-05 21:08:08,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 21:08:08,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:08,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:08:08,659 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:08:08,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-05 21:08:08,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-05 21:08:08,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:08:08,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-05 21:08:08,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:08:08,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:08,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:08:08,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:08,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938071539] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:08:08,801 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:08:08,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-12-05 21:08:08,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867605304] [2022-12-05 21:08:08,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:08:08,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-05 21:08:08,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:08:08,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-05 21:08:08,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-12-05 21:08:08,803 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:08:08,803 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 353 transitions, 6533 flow. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:08,803 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:08:08,803 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:08:08,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:08:09,292 INFO L130 PetriNetUnfolder]: 953/1874 cut-off events. [2022-12-05 21:08:09,292 INFO L131 PetriNetUnfolder]: For 38081/38081 co-relation queries the response was YES. [2022-12-05 21:08:09,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15512 conditions, 1874 events. 953/1874 cut-off events. For 38081/38081 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 11968 event pairs, 58 based on Foata normal form. 6/1880 useless extension candidates. Maximal degree in co-relation 15425. Up to 1580 conditions per place. [2022-12-05 21:08:09,308 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 314 selfloop transitions, 85 changer transitions 0/399 dead transitions. [2022-12-05 21:08:09,308 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 399 transitions, 8085 flow [2022-12-05 21:08:09,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-05 21:08:09,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-05 21:08:09,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 56 transitions. [2022-12-05 21:08:09,311 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3393939393939394 [2022-12-05 21:08:09,311 INFO L175 Difference]: Start difference. First operand has 241 places, 353 transitions, 6533 flow. Second operand 11 states and 56 transitions. [2022-12-05 21:08:09,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 399 transitions, 8085 flow [2022-12-05 21:08:09,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 399 transitions, 7664 flow, removed 172 selfloop flow, removed 9 redundant places. [2022-12-05 21:08:09,544 INFO L231 Difference]: Finished difference. Result has 244 places, 373 transitions, 6826 flow [2022-12-05 21:08:09,544 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=6185, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6826, PETRI_PLACES=244, PETRI_TRANSITIONS=373} [2022-12-05 21:08:09,545 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 224 predicate places. [2022-12-05 21:08:09,545 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 373 transitions, 6826 flow [2022-12-05 21:08:09,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:09,545 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:08:09,545 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:08:09,549 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-12-05 21:08:09,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:09,747 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:08:09,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:08:09,747 INFO L85 PathProgramCache]: Analyzing trace with hash -852356008, now seen corresponding path program 22 times [2022-12-05 21:08:09,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:08:09,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92314459] [2022-12-05 21:08:09,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:08:09,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:08:09,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:08:09,812 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:09,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:08:09,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92314459] [2022-12-05 21:08:09,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92314459] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:08:09,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135571755] [2022-12-05 21:08:09,812 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 21:08:09,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:09,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:08:09,821 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:08:09,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-05 21:08:09,892 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 21:08:09,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:08:09,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-05 21:08:09,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:08:09,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:09,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:08:09,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:09,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135571755] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:08:09,966 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:08:09,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-12-05 21:08:09,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257545789] [2022-12-05 21:08:09,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:08:09,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-05 21:08:09,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:08:09,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-05 21:08:09,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-12-05 21:08:09,967 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:08:09,967 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 373 transitions, 6826 flow. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:09,967 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:08:09,967 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:08:09,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:08:10,510 INFO L130 PetriNetUnfolder]: 987/1956 cut-off events. [2022-12-05 21:08:10,510 INFO L131 PetriNetUnfolder]: For 39316/39316 co-relation queries the response was YES. [2022-12-05 21:08:10,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15977 conditions, 1956 events. 987/1956 cut-off events. For 39316/39316 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 12765 event pairs, 50 based on Foata normal form. 8/1964 useless extension candidates. Maximal degree in co-relation 15887. Up to 1339 conditions per place. [2022-12-05 21:08:10,525 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 293 selfloop transitions, 139 changer transitions 0/432 dead transitions. [2022-12-05 21:08:10,526 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 432 transitions, 8358 flow [2022-12-05 21:08:10,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-05 21:08:10,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-05 21:08:10,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 85 transitions. [2022-12-05 21:08:10,526 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2022-12-05 21:08:10,526 INFO L175 Difference]: Start difference. First operand has 244 places, 373 transitions, 6826 flow. Second operand 14 states and 85 transitions. [2022-12-05 21:08:10,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 432 transitions, 8358 flow [2022-12-05 21:08:10,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 432 transitions, 8219 flow, removed 18 selfloop flow, removed 5 redundant places. [2022-12-05 21:08:10,755 INFO L231 Difference]: Finished difference. Result has 255 places, 383 transitions, 7302 flow [2022-12-05 21:08:10,756 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=6687, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7302, PETRI_PLACES=255, PETRI_TRANSITIONS=383} [2022-12-05 21:08:10,756 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 235 predicate places. [2022-12-05 21:08:10,756 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 383 transitions, 7302 flow [2022-12-05 21:08:10,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:10,756 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:08:10,756 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:08:10,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-12-05 21:08:10,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:10,960 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:08:10,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:08:10,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1739859689, now seen corresponding path program 23 times [2022-12-05 21:08:10,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:08:10,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579100752] [2022-12-05 21:08:10,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:08:10,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:08:10,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:08:11,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:11,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:08:11,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579100752] [2022-12-05 21:08:11,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579100752] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:08:11,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908581423] [2022-12-05 21:08:11,005 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 21:08:11,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:11,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:08:11,007 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:08:11,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-05 21:08:11,079 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-05 21:08:11,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:08:11,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-05 21:08:11,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:08:11,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:11,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:08:11,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:11,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908581423] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:08:11,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:08:11,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-12-05 21:08:11,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968559168] [2022-12-05 21:08:11,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:08:11,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-05 21:08:11,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:08:11,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-05 21:08:11,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-12-05 21:08:11,142 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:08:11,142 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 383 transitions, 7302 flow. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:11,142 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:08:11,142 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:08:11,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:08:11,734 INFO L130 PetriNetUnfolder]: 1118/2253 cut-off events. [2022-12-05 21:08:11,734 INFO L131 PetriNetUnfolder]: For 50832/50832 co-relation queries the response was YES. [2022-12-05 21:08:11,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18818 conditions, 2253 events. 1118/2253 cut-off events. For 50832/50832 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 15454 event pairs, 276 based on Foata normal form. 22/2275 useless extension candidates. Maximal degree in co-relation 18725. Up to 1480 conditions per place. [2022-12-05 21:08:11,752 INFO L137 encePairwiseOnDemand]: 10/15 looper letters, 339 selfloop transitions, 136 changer transitions 0/475 dead transitions. [2022-12-05 21:08:11,753 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 475 transitions, 9756 flow [2022-12-05 21:08:11,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-05 21:08:11,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-05 21:08:11,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 88 transitions. [2022-12-05 21:08:11,754 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4512820512820513 [2022-12-05 21:08:11,754 INFO L175 Difference]: Start difference. First operand has 255 places, 383 transitions, 7302 flow. Second operand 13 states and 88 transitions. [2022-12-05 21:08:11,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 475 transitions, 9756 flow [2022-12-05 21:08:12,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 475 transitions, 9483 flow, removed 60 selfloop flow, removed 10 redundant places. [2022-12-05 21:08:12,057 INFO L231 Difference]: Finished difference. Result has 260 places, 414 transitions, 8193 flow [2022-12-05 21:08:12,057 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=7008, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8193, PETRI_PLACES=260, PETRI_TRANSITIONS=414} [2022-12-05 21:08:12,058 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 240 predicate places. [2022-12-05 21:08:12,058 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 414 transitions, 8193 flow [2022-12-05 21:08:12,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:12,058 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:08:12,058 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:08:12,064 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-12-05 21:08:12,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:12,259 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:08:12,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:08:12,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1738670397, now seen corresponding path program 24 times [2022-12-05 21:08:12,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:08:12,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967337220] [2022-12-05 21:08:12,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:08:12,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:08:12,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:08:12,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:12,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:08:12,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967337220] [2022-12-05 21:08:12,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967337220] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:08:12,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228887280] [2022-12-05 21:08:12,308 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 21:08:12,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:12,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:08:12,309 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:08:12,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-05 21:08:12,394 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-05 21:08:12,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:08:12,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-05 21:08:12,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:08:12,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:12,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:08:12,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:12,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228887280] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:08:12,465 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:08:12,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-12-05 21:08:12,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676248000] [2022-12-05 21:08:12,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:08:12,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-05 21:08:12,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:08:12,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-05 21:08:12,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-12-05 21:08:12,466 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:08:12,466 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 414 transitions, 8193 flow. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:12,466 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:08:12,466 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:08:12,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:08:13,108 INFO L130 PetriNetUnfolder]: 1104/2239 cut-off events. [2022-12-05 21:08:13,109 INFO L131 PetriNetUnfolder]: For 53255/53255 co-relation queries the response was YES. [2022-12-05 21:08:13,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19014 conditions, 2239 events. 1104/2239 cut-off events. For 53255/53255 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 15469 event pairs, 172 based on Foata normal form. 14/2253 useless extension candidates. Maximal degree in co-relation 18919. Up to 738 conditions per place. [2022-12-05 21:08:13,162 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 298 selfloop transitions, 168 changer transitions 3/469 dead transitions. [2022-12-05 21:08:13,162 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 469 transitions, 9742 flow [2022-12-05 21:08:13,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-05 21:08:13,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-05 21:08:13,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 93 transitions. [2022-12-05 21:08:13,164 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.34444444444444444 [2022-12-05 21:08:13,164 INFO L175 Difference]: Start difference. First operand has 260 places, 414 transitions, 8193 flow. Second operand 18 states and 93 transitions. [2022-12-05 21:08:13,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 469 transitions, 9742 flow [2022-12-05 21:08:13,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 469 transitions, 9400 flow, removed 96 selfloop flow, removed 8 redundant places. [2022-12-05 21:08:13,473 INFO L231 Difference]: Finished difference. Result has 270 places, 414 transitions, 8247 flow [2022-12-05 21:08:13,474 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=7675, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=8247, PETRI_PLACES=270, PETRI_TRANSITIONS=414} [2022-12-05 21:08:13,474 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 250 predicate places. [2022-12-05 21:08:13,474 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 414 transitions, 8247 flow [2022-12-05 21:08:13,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:13,474 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:08:13,474 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:08:13,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-12-05 21:08:13,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-12-05 21:08:13,678 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:08:13,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:08:13,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1496665652, now seen corresponding path program 25 times [2022-12-05 21:08:13,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:08:13,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51520088] [2022-12-05 21:08:13,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:08:13,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:08:13,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:08:13,724 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:13,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:08:13,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51520088] [2022-12-05 21:08:13,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51520088] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:08:13,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955813193] [2022-12-05 21:08:13,725 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-05 21:08:13,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:13,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:08:13,726 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:08:13,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-05 21:08:13,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:08:13,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-05 21:08:13,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:08:13,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:13,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:08:13,871 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:13,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955813193] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:08:13,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:08:13,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-12-05 21:08:13,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416548848] [2022-12-05 21:08:13,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:08:13,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-05 21:08:13,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:08:13,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-05 21:08:13,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-12-05 21:08:13,872 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:08:13,872 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 414 transitions, 8247 flow. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:13,872 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:08:13,872 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:08:13,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:08:14,571 INFO L130 PetriNetUnfolder]: 1083/2182 cut-off events. [2022-12-05 21:08:14,571 INFO L131 PetriNetUnfolder]: For 51788/51788 co-relation queries the response was YES. [2022-12-05 21:08:14,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18955 conditions, 2182 events. 1083/2182 cut-off events. For 51788/51788 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 14813 event pairs, 36 based on Foata normal form. 12/2194 useless extension candidates. Maximal degree in co-relation 18861. Up to 985 conditions per place. [2022-12-05 21:08:14,590 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 283 selfloop transitions, 183 changer transitions 4/470 dead transitions. [2022-12-05 21:08:14,590 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 470 transitions, 9934 flow [2022-12-05 21:08:14,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-05 21:08:14,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-05 21:08:14,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 92 transitions. [2022-12-05 21:08:14,591 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.2920634920634921 [2022-12-05 21:08:14,591 INFO L175 Difference]: Start difference. First operand has 270 places, 414 transitions, 8247 flow. Second operand 21 states and 92 transitions. [2022-12-05 21:08:14,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 470 transitions, 9934 flow [2022-12-05 21:08:14,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 470 transitions, 9460 flow, removed 132 selfloop flow, removed 9 redundant places. [2022-12-05 21:08:14,923 INFO L231 Difference]: Finished difference. Result has 281 places, 421 transitions, 8391 flow [2022-12-05 21:08:14,924 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=7763, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=8391, PETRI_PLACES=281, PETRI_TRANSITIONS=421} [2022-12-05 21:08:14,924 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 261 predicate places. [2022-12-05 21:08:14,924 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 421 transitions, 8391 flow [2022-12-05 21:08:14,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:14,924 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:08:14,924 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:08:14,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-12-05 21:08:15,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-12-05 21:08:15,128 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:08:15,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:08:15,129 INFO L85 PathProgramCache]: Analyzing trace with hash -257077690, now seen corresponding path program 26 times [2022-12-05 21:08:15,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:08:15,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486313932] [2022-12-05 21:08:15,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:08:15,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:08:15,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:08:15,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:15,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:08:15,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486313932] [2022-12-05 21:08:15,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486313932] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:08:15,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893411865] [2022-12-05 21:08:15,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 21:08:15,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:15,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:08:15,176 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:08:15,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-05 21:08:15,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:08:15,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:08:15,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-05 21:08:15,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:08:15,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:15,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:08:15,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:15,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893411865] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:08:15,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:08:15,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-12-05 21:08:15,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678620476] [2022-12-05 21:08:15,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:08:15,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-05 21:08:15,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:08:15,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-05 21:08:15,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-12-05 21:08:15,310 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:08:15,310 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 421 transitions, 8391 flow. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:15,310 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:08:15,310 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:08:15,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:08:15,951 INFO L130 PetriNetUnfolder]: 1064/2129 cut-off events. [2022-12-05 21:08:15,951 INFO L131 PetriNetUnfolder]: For 49566/49566 co-relation queries the response was YES. [2022-12-05 21:08:15,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18783 conditions, 2129 events. 1064/2129 cut-off events. For 49566/49566 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 14271 event pairs, 32 based on Foata normal form. 12/2141 useless extension candidates. Maximal degree in co-relation 18685. Up to 908 conditions per place. [2022-12-05 21:08:15,968 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 268 selfloop transitions, 201 changer transitions 4/473 dead transitions. [2022-12-05 21:08:15,969 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 473 transitions, 10034 flow [2022-12-05 21:08:15,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-05 21:08:15,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-05 21:08:15,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 86 transitions. [2022-12-05 21:08:15,969 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3017543859649123 [2022-12-05 21:08:15,970 INFO L175 Difference]: Start difference. First operand has 281 places, 421 transitions, 8391 flow. Second operand 19 states and 86 transitions. [2022-12-05 21:08:15,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 473 transitions, 10034 flow [2022-12-05 21:08:16,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 473 transitions, 9787 flow, removed 87 selfloop flow, removed 7 redundant places. [2022-12-05 21:08:16,273 INFO L231 Difference]: Finished difference. Result has 292 places, 424 transitions, 8725 flow [2022-12-05 21:08:16,273 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=8105, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=8725, PETRI_PLACES=292, PETRI_TRANSITIONS=424} [2022-12-05 21:08:16,273 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 272 predicate places. [2022-12-05 21:08:16,273 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 424 transitions, 8725 flow [2022-12-05 21:08:16,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:16,273 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:08:16,273 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:08:16,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-12-05 21:08:16,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:16,477 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:08:16,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:08:16,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1701802345, now seen corresponding path program 27 times [2022-12-05 21:08:16,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:08:16,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3485548] [2022-12-05 21:08:16,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:08:16,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:08:16,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:08:16,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:16,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:08:16,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3485548] [2022-12-05 21:08:16,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3485548] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:08:16,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580854788] [2022-12-05 21:08:16,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 21:08:16,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:16,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:08:16,523 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:08:16,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-05 21:08:16,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-05 21:08:16,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:08:16,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-05 21:08:16,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:08:16,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:16,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:08:16,658 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:16,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580854788] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:08:16,658 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:08:16,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-12-05 21:08:16,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268507055] [2022-12-05 21:08:16,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:08:16,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-05 21:08:16,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:08:16,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-05 21:08:16,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-12-05 21:08:16,659 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:08:16,659 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 424 transitions, 8725 flow. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:16,659 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:08:16,659 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:08:16,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:08:17,270 INFO L130 PetriNetUnfolder]: 1057/2110 cut-off events. [2022-12-05 21:08:17,271 INFO L131 PetriNetUnfolder]: For 48712/48712 co-relation queries the response was YES. [2022-12-05 21:08:17,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19028 conditions, 2110 events. 1057/2110 cut-off events. For 48712/48712 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 14183 event pairs, 191 based on Foata normal form. 4/2114 useless extension candidates. Maximal degree in co-relation 18929. Up to 853 conditions per place. [2022-12-05 21:08:17,289 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 305 selfloop transitions, 145 changer transitions 6/456 dead transitions. [2022-12-05 21:08:17,289 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 456 transitions, 9884 flow [2022-12-05 21:08:17,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-05 21:08:17,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-05 21:08:17,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 73 transitions. [2022-12-05 21:08:17,290 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.30416666666666664 [2022-12-05 21:08:17,290 INFO L175 Difference]: Start difference. First operand has 292 places, 424 transitions, 8725 flow. Second operand 16 states and 73 transitions. [2022-12-05 21:08:17,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 456 transitions, 9884 flow [2022-12-05 21:08:17,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 456 transitions, 9652 flow, removed 10 selfloop flow, removed 12 redundant places. [2022-12-05 21:08:17,603 INFO L231 Difference]: Finished difference. Result has 292 places, 417 transitions, 8636 flow [2022-12-05 21:08:17,603 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=8420, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=8636, PETRI_PLACES=292, PETRI_TRANSITIONS=417} [2022-12-05 21:08:17,604 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 272 predicate places. [2022-12-05 21:08:17,604 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 417 transitions, 8636 flow [2022-12-05 21:08:17,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:17,605 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:08:17,605 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:08:17,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-12-05 21:08:17,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-12-05 21:08:17,808 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:08:17,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:08:17,809 INFO L85 PathProgramCache]: Analyzing trace with hash -64970916, now seen corresponding path program 28 times [2022-12-05 21:08:17,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:08:17,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133331146] [2022-12-05 21:08:17,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:08:17,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:08:17,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:08:17,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:17,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:08:17,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133331146] [2022-12-05 21:08:17,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133331146] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:08:17,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166608869] [2022-12-05 21:08:17,861 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 21:08:17,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:17,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:08:17,863 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:08:17,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-05 21:08:17,939 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 21:08:17,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:08:17,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-05 21:08:17,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:08:17,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:17,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:08:18,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:18,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166608869] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:08:18,007 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:08:18,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-12-05 21:08:18,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6901061] [2022-12-05 21:08:18,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:08:18,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-05 21:08:18,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:08:18,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-05 21:08:18,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-12-05 21:08:18,008 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:08:18,008 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 417 transitions, 8636 flow. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:18,008 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:08:18,008 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:08:18,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:08:18,621 INFO L130 PetriNetUnfolder]: 1157/2306 cut-off events. [2022-12-05 21:08:18,621 INFO L131 PetriNetUnfolder]: For 60162/60162 co-relation queries the response was YES. [2022-12-05 21:08:18,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21425 conditions, 2306 events. 1157/2306 cut-off events. For 60162/60162 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 15680 event pairs, 44 based on Foata normal form. 16/2322 useless extension candidates. Maximal degree in co-relation 21327. Up to 1274 conditions per place. [2022-12-05 21:08:18,640 INFO L137 encePairwiseOnDemand]: 10/15 looper letters, 311 selfloop transitions, 188 changer transitions 0/499 dead transitions. [2022-12-05 21:08:18,640 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 499 transitions, 11160 flow [2022-12-05 21:08:18,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-05 21:08:18,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-05 21:08:18,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 86 transitions. [2022-12-05 21:08:18,641 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.38222222222222224 [2022-12-05 21:08:18,641 INFO L175 Difference]: Start difference. First operand has 292 places, 417 transitions, 8636 flow. Second operand 15 states and 86 transitions. [2022-12-05 21:08:18,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 499 transitions, 11160 flow [2022-12-05 21:08:18,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 499 transitions, 10903 flow, removed 4 selfloop flow, removed 11 redundant places. [2022-12-05 21:08:18,962 INFO L231 Difference]: Finished difference. Result has 291 places, 442 transitions, 9660 flow [2022-12-05 21:08:18,962 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=8284, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=9660, PETRI_PLACES=291, PETRI_TRANSITIONS=442} [2022-12-05 21:08:18,963 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 271 predicate places. [2022-12-05 21:08:18,963 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 442 transitions, 9660 flow [2022-12-05 21:08:18,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:18,963 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:08:18,963 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:08:18,967 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-12-05 21:08:19,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-12-05 21:08:19,167 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:08:19,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:08:19,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1928837148, now seen corresponding path program 29 times [2022-12-05 21:08:19,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:08:19,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102542907] [2022-12-05 21:08:19,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:08:19,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:08:19,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:08:19,530 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:19,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:08:19,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102542907] [2022-12-05 21:08:19,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102542907] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:08:19,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872871921] [2022-12-05 21:08:19,531 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 21:08:19,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:19,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:08:19,532 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:08:19,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-12-05 21:08:19,620 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:08:19,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:08:19,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2022-12-05 21:08:19,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:08:19,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:19,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:08:19,885 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:19,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872871921] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:08:19,885 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:08:19,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-12-05 21:08:19,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30115047] [2022-12-05 21:08:19,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:08:19,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-05 21:08:19,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:08:19,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-05 21:08:19,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-12-05 21:08:19,886 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 15 [2022-12-05 21:08:19,886 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 442 transitions, 9660 flow. Second operand has 16 states, 16 states have (on average 4.125) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:19,886 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:08:19,886 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 15 [2022-12-05 21:08:19,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:08:20,843 INFO L130 PetriNetUnfolder]: 1277/2589 cut-off events. [2022-12-05 21:08:20,844 INFO L131 PetriNetUnfolder]: For 70958/70962 co-relation queries the response was YES. [2022-12-05 21:08:20,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24734 conditions, 2589 events. 1277/2589 cut-off events. For 70958/70962 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 18422 event pairs, 79 based on Foata normal form. 7/2591 useless extension candidates. Maximal degree in co-relation 24633. Up to 2168 conditions per place. [2022-12-05 21:08:20,866 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 432 selfloop transitions, 83 changer transitions 18/543 dead transitions. [2022-12-05 21:08:20,866 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 543 transitions, 12045 flow [2022-12-05 21:08:20,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-05 21:08:20,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-05 21:08:20,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 101 transitions. [2022-12-05 21:08:20,867 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5611111111111111 [2022-12-05 21:08:20,867 INFO L175 Difference]: Start difference. First operand has 291 places, 442 transitions, 9660 flow. Second operand 12 states and 101 transitions. [2022-12-05 21:08:20,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 543 transitions, 12045 flow [2022-12-05 21:08:21,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 543 transitions, 11637 flow, removed 161 selfloop flow, removed 9 redundant places. [2022-12-05 21:08:21,289 INFO L231 Difference]: Finished difference. Result has 303 places, 487 transitions, 10598 flow [2022-12-05 21:08:21,290 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=9290, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10598, PETRI_PLACES=303, PETRI_TRANSITIONS=487} [2022-12-05 21:08:21,290 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 283 predicate places. [2022-12-05 21:08:21,290 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 487 transitions, 10598 flow [2022-12-05 21:08:21,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:21,290 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:08:21,290 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:08:21,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-12-05 21:08:21,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-12-05 21:08:21,495 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:08:21,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:08:21,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1616838672, now seen corresponding path program 30 times [2022-12-05 21:08:21,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:08:21,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577361695] [2022-12-05 21:08:21,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:08:21,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:08:21,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:08:21,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:21,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:08:21,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577361695] [2022-12-05 21:08:21,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577361695] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:08:21,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243092981] [2022-12-05 21:08:21,786 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 21:08:21,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:21,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:08:21,787 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:08:21,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-12-05 21:08:21,872 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-05 21:08:21,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:08:21,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2022-12-05 21:08:21,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:08:21,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:21,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:08:22,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:22,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243092981] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:08:22,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:08:22,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2022-12-05 21:08:22,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83958982] [2022-12-05 21:08:22,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:08:22,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-05 21:08:22,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:08:22,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-05 21:08:22,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-12-05 21:08:22,168 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 15 [2022-12-05 21:08:22,168 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 487 transitions, 10598 flow. Second operand has 20 states, 20 states have (on average 4.0) internal successors, (80), 20 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:22,168 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:08:22,168 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 15 [2022-12-05 21:08:22,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:08:23,107 INFO L130 PetriNetUnfolder]: 1363/2755 cut-off events. [2022-12-05 21:08:23,107 INFO L131 PetriNetUnfolder]: For 76214/76216 co-relation queries the response was YES. [2022-12-05 21:08:23,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26778 conditions, 2755 events. 1363/2755 cut-off events. For 76214/76216 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 19860 event pairs, 82 based on Foata normal form. 5/2754 useless extension candidates. Maximal degree in co-relation 26669. Up to 2194 conditions per place. [2022-12-05 21:08:23,135 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 452 selfloop transitions, 106 changer transitions 13/581 dead transitions. [2022-12-05 21:08:23,135 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 581 transitions, 13132 flow [2022-12-05 21:08:23,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-05 21:08:23,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-05 21:08:23,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 100 transitions. [2022-12-05 21:08:23,136 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6060606060606061 [2022-12-05 21:08:23,136 INFO L175 Difference]: Start difference. First operand has 303 places, 487 transitions, 10598 flow. Second operand 11 states and 100 transitions. [2022-12-05 21:08:23,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 581 transitions, 13132 flow [2022-12-05 21:08:23,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 581 transitions, 12798 flow, removed 167 selfloop flow, removed 2 redundant places. [2022-12-05 21:08:23,653 INFO L231 Difference]: Finished difference. Result has 315 places, 520 transitions, 11480 flow [2022-12-05 21:08:23,653 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=10284, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11480, PETRI_PLACES=315, PETRI_TRANSITIONS=520} [2022-12-05 21:08:23,653 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 295 predicate places. [2022-12-05 21:08:23,653 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 520 transitions, 11480 flow [2022-12-05 21:08:23,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.0) internal successors, (80), 20 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:23,654 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:08:23,654 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:08:23,657 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-12-05 21:08:23,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:23,858 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:08:23,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:08:23,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1351458522, now seen corresponding path program 31 times [2022-12-05 21:08:23,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:08:23,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004766394] [2022-12-05 21:08:23,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:08:23,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:08:23,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:08:24,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:24,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:08:24,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004766394] [2022-12-05 21:08:24,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004766394] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:08:24,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523845580] [2022-12-05 21:08:24,131 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-05 21:08:24,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:24,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:08:24,132 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:08:24,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-12-05 21:08:24,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:08:24,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2022-12-05 21:08:24,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:08:24,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:24,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:08:24,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:24,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523845580] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:08:24,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:08:24,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2022-12-05 21:08:24,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068814223] [2022-12-05 21:08:24,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:08:24,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-05 21:08:24,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:08:24,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-05 21:08:24,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-12-05 21:08:24,473 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 15 [2022-12-05 21:08:24,473 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 520 transitions, 11480 flow. Second operand has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:24,473 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:08:24,474 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 15 [2022-12-05 21:08:24,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:08:25,330 INFO L130 PetriNetUnfolder]: 1357/2719 cut-off events. [2022-12-05 21:08:25,330 INFO L131 PetriNetUnfolder]: For 79963/79965 co-relation queries the response was YES. [2022-12-05 21:08:25,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26594 conditions, 2719 events. 1357/2719 cut-off events. For 79963/79965 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 19352 event pairs, 79 based on Foata normal form. 3/2716 useless extension candidates. Maximal degree in co-relation 26480. Up to 2194 conditions per place. [2022-12-05 21:08:25,356 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 452 selfloop transitions, 104 changer transitions 5/571 dead transitions. [2022-12-05 21:08:25,356 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 571 transitions, 13066 flow [2022-12-05 21:08:25,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-05 21:08:25,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-05 21:08:25,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 88 transitions. [2022-12-05 21:08:25,367 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6518518518518519 [2022-12-05 21:08:25,367 INFO L175 Difference]: Start difference. First operand has 315 places, 520 transitions, 11480 flow. Second operand 9 states and 88 transitions. [2022-12-05 21:08:25,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 571 transitions, 13066 flow [2022-12-05 21:08:25,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 571 transitions, 12706 flow, removed 147 selfloop flow, removed 5 redundant places. [2022-12-05 21:08:25,942 INFO L231 Difference]: Finished difference. Result has 318 places, 521 transitions, 11430 flow [2022-12-05 21:08:25,943 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=11138, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11430, PETRI_PLACES=318, PETRI_TRANSITIONS=521} [2022-12-05 21:08:25,944 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 298 predicate places. [2022-12-05 21:08:25,944 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 521 transitions, 11430 flow [2022-12-05 21:08:25,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:25,944 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:08:25,944 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:08:25,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-12-05 21:08:26,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:26,148 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:08:26,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:08:26,148 INFO L85 PathProgramCache]: Analyzing trace with hash -2027548112, now seen corresponding path program 32 times [2022-12-05 21:08:26,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:08:26,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612868447] [2022-12-05 21:08:26,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:08:26,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:08:26,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:08:26,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:26,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:08:26,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612868447] [2022-12-05 21:08:26,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612868447] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:08:26,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083581259] [2022-12-05 21:08:26,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 21:08:26,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:26,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:08:26,426 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:08:26,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-12-05 21:08:26,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:08:26,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:08:26,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2022-12-05 21:08:26,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:08:26,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:26,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:08:26,817 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:26,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083581259] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:08:26,817 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:08:26,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-12-05 21:08:26,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493958021] [2022-12-05 21:08:26,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:08:26,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-05 21:08:26,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:08:26,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-05 21:08:26,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-12-05 21:08:26,818 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 15 [2022-12-05 21:08:26,818 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 521 transitions, 11430 flow. Second operand has 18 states, 18 states have (on average 4.0) internal successors, (72), 18 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:26,818 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:08:26,818 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 15 [2022-12-05 21:08:26,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:08:27,757 INFO L130 PetriNetUnfolder]: 1348/2692 cut-off events. [2022-12-05 21:08:27,758 INFO L131 PetriNetUnfolder]: For 77053/77055 co-relation queries the response was YES. [2022-12-05 21:08:27,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26212 conditions, 2692 events. 1348/2692 cut-off events. For 77053/77055 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 19021 event pairs, 82 based on Foata normal form. 3/2689 useless extension candidates. Maximal degree in co-relation 26098. Up to 2266 conditions per place. [2022-12-05 21:08:27,783 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 459 selfloop transitions, 99 changer transitions 5/573 dead transitions. [2022-12-05 21:08:27,783 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 573 transitions, 12979 flow [2022-12-05 21:08:27,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-05 21:08:27,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-05 21:08:27,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 95 transitions. [2022-12-05 21:08:27,784 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5757575757575758 [2022-12-05 21:08:27,784 INFO L175 Difference]: Start difference. First operand has 318 places, 521 transitions, 11430 flow. Second operand 11 states and 95 transitions. [2022-12-05 21:08:27,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 573 transitions, 12979 flow [2022-12-05 21:08:28,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 573 transitions, 12729 flow, removed 41 selfloop flow, removed 6 redundant places. [2022-12-05 21:08:28,366 INFO L231 Difference]: Finished difference. Result has 323 places, 527 transitions, 11550 flow [2022-12-05 21:08:28,367 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=11188, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11550, PETRI_PLACES=323, PETRI_TRANSITIONS=527} [2022-12-05 21:08:28,367 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 303 predicate places. [2022-12-05 21:08:28,367 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 527 transitions, 11550 flow [2022-12-05 21:08:28,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.0) internal successors, (72), 18 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:28,367 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:08:28,367 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:08:28,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-12-05 21:08:28,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-12-05 21:08:28,572 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:08:28,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:08:28,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1301430082, now seen corresponding path program 33 times [2022-12-05 21:08:28,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:08:28,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438475619] [2022-12-05 21:08:28,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:08:28,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:08:28,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:08:28,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:28,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:08:28,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438475619] [2022-12-05 21:08:28,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438475619] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:08:28,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328800949] [2022-12-05 21:08:28,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 21:08:28,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:28,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:08:28,838 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:08:28,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-12-05 21:08:28,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-05 21:08:28,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:08:28,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2022-12-05 21:08:28,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:08:29,045 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:29,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:08:29,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:29,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328800949] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:08:29,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:08:29,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 14 [2022-12-05 21:08:29,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047885487] [2022-12-05 21:08:29,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:08:29,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-05 21:08:29,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:08:29,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-05 21:08:29,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-12-05 21:08:29,192 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 15 [2022-12-05 21:08:29,192 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 527 transitions, 11550 flow. Second operand has 16 states, 16 states have (on average 4.3125) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:29,192 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:08:29,192 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 15 [2022-12-05 21:08:29,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:08:30,046 INFO L130 PetriNetUnfolder]: 1371/2750 cut-off events. [2022-12-05 21:08:30,046 INFO L131 PetriNetUnfolder]: For 79501/79503 co-relation queries the response was YES. [2022-12-05 21:08:30,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26860 conditions, 2750 events. 1371/2750 cut-off events. For 79501/79503 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 19664 event pairs, 104 based on Foata normal form. 4/2748 useless extension candidates. Maximal degree in co-relation 26745. Up to 2522 conditions per place. [2022-12-05 21:08:30,074 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 489 selfloop transitions, 71 changer transitions 6/576 dead transitions. [2022-12-05 21:08:30,075 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 576 transitions, 13303 flow [2022-12-05 21:08:30,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-05 21:08:30,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-05 21:08:30,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 72 transitions. [2022-12-05 21:08:30,076 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2022-12-05 21:08:30,076 INFO L175 Difference]: Start difference. First operand has 323 places, 527 transitions, 11550 flow. Second operand 9 states and 72 transitions. [2022-12-05 21:08:30,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 576 transitions, 13303 flow [2022-12-05 21:08:30,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 576 transitions, 13038 flow, removed 45 selfloop flow, removed 8 redundant places. [2022-12-05 21:08:30,713 INFO L231 Difference]: Finished difference. Result has 326 places, 546 transitions, 11974 flow [2022-12-05 21:08:30,713 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=11289, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11974, PETRI_PLACES=326, PETRI_TRANSITIONS=546} [2022-12-05 21:08:30,713 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 306 predicate places. [2022-12-05 21:08:30,714 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 546 transitions, 11974 flow [2022-12-05 21:08:30,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:30,714 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:08:30,714 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:08:30,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-12-05 21:08:30,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-12-05 21:08:30,918 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:08:30,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:08:30,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1300240790, now seen corresponding path program 34 times [2022-12-05 21:08:30,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:08:30,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676430353] [2022-12-05 21:08:30,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:08:30,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:08:30,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:08:31,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:31,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:08:31,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676430353] [2022-12-05 21:08:31,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676430353] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:08:31,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141696311] [2022-12-05 21:08:31,197 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 21:08:31,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:31,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:08:31,217 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:08:31,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-12-05 21:08:31,300 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 21:08:31,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:08:31,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2022-12-05 21:08:31,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:08:31,418 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:31,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:08:31,560 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:31,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141696311] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:08:31,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:08:31,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 16 [2022-12-05 21:08:31,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110913205] [2022-12-05 21:08:31,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:08:31,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-05 21:08:31,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:08:31,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-05 21:08:31,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-12-05 21:08:31,561 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 15 [2022-12-05 21:08:31,561 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 546 transitions, 11974 flow. Second operand has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 18 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:31,561 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:08:31,561 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 15 [2022-12-05 21:08:31,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:08:32,504 INFO L130 PetriNetUnfolder]: 1425/2860 cut-off events. [2022-12-05 21:08:32,504 INFO L131 PetriNetUnfolder]: For 83667/83669 co-relation queries the response was YES. [2022-12-05 21:08:32,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27865 conditions, 2860 events. 1425/2860 cut-off events. For 83667/83669 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 20574 event pairs, 102 based on Foata normal form. 4/2858 useless extension candidates. Maximal degree in co-relation 27747. Up to 2541 conditions per place. [2022-12-05 21:08:32,535 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 495 selfloop transitions, 91 changer transitions 7/603 dead transitions. [2022-12-05 21:08:32,535 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 603 transitions, 13836 flow [2022-12-05 21:08:32,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-05 21:08:32,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-05 21:08:32,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 79 transitions. [2022-12-05 21:08:32,536 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5851851851851851 [2022-12-05 21:08:32,536 INFO L175 Difference]: Start difference. First operand has 326 places, 546 transitions, 11974 flow. Second operand 9 states and 79 transitions. [2022-12-05 21:08:32,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 603 transitions, 13836 flow [2022-12-05 21:08:33,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 603 transitions, 13545 flow, removed 99 selfloop flow, removed 5 redundant places. [2022-12-05 21:08:33,208 INFO L231 Difference]: Finished difference. Result has 331 places, 565 transitions, 12363 flow [2022-12-05 21:08:33,209 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=11689, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12363, PETRI_PLACES=331, PETRI_TRANSITIONS=565} [2022-12-05 21:08:33,210 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 311 predicate places. [2022-12-05 21:08:33,210 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 565 transitions, 12363 flow [2022-12-05 21:08:33,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 18 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:33,210 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:08:33,210 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:08:33,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-12-05 21:08:33,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-12-05 21:08:33,414 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:08:33,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:08:33,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1034860640, now seen corresponding path program 35 times [2022-12-05 21:08:33,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:08:33,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905475836] [2022-12-05 21:08:33,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:08:33,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:08:33,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:08:33,684 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:33,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:08:33,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905475836] [2022-12-05 21:08:33,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905475836] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:08:33,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457656029] [2022-12-05 21:08:33,684 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 21:08:33,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:33,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:08:33,705 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:08:33,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-12-05 21:08:33,788 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-05 21:08:33,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:08:33,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2022-12-05 21:08:33,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:08:33,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:33,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:08:34,067 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:34,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457656029] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:08:34,068 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:08:34,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 17 [2022-12-05 21:08:34,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82598948] [2022-12-05 21:08:34,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:08:34,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-05 21:08:34,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:08:34,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-05 21:08:34,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-12-05 21:08:34,069 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 15 [2022-12-05 21:08:34,069 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 565 transitions, 12363 flow. Second operand has 19 states, 19 states have (on average 4.0) internal successors, (76), 19 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:34,069 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:08:34,069 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 15 [2022-12-05 21:08:34,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:08:35,043 INFO L130 PetriNetUnfolder]: 1420/2829 cut-off events. [2022-12-05 21:08:35,043 INFO L131 PetriNetUnfolder]: For 84079/84081 co-relation queries the response was YES. [2022-12-05 21:08:35,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27705 conditions, 2829 events. 1420/2829 cut-off events. For 84079/84081 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 20161 event pairs, 107 based on Foata normal form. 4/2827 useless extension candidates. Maximal degree in co-relation 27585. Up to 2541 conditions per place. [2022-12-05 21:08:35,071 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 490 selfloop transitions, 89 changer transitions 6/595 dead transitions. [2022-12-05 21:08:35,071 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 595 transitions, 13720 flow [2022-12-05 21:08:35,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-05 21:08:35,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-05 21:08:35,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 71 transitions. [2022-12-05 21:08:35,072 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5916666666666667 [2022-12-05 21:08:35,072 INFO L175 Difference]: Start difference. First operand has 331 places, 565 transitions, 12363 flow. Second operand 8 states and 71 transitions. [2022-12-05 21:08:35,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 595 transitions, 13720 flow [2022-12-05 21:08:35,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 595 transitions, 13540 flow, removed 22 selfloop flow, removed 6 redundant places. [2022-12-05 21:08:35,726 INFO L231 Difference]: Finished difference. Result has 333 places, 566 transitions, 12450 flow [2022-12-05 21:08:35,727 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=12187, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12450, PETRI_PLACES=333, PETRI_TRANSITIONS=566} [2022-12-05 21:08:35,727 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 313 predicate places. [2022-12-05 21:08:35,727 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 566 transitions, 12450 flow [2022-12-05 21:08:35,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.0) internal successors, (76), 19 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:35,727 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:08:35,727 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:08:35,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-12-05 21:08:35,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-12-05 21:08:35,932 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:08:35,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:08:35,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1282705812, now seen corresponding path program 36 times [2022-12-05 21:08:35,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:08:35,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542032255] [2022-12-05 21:08:35,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:08:35,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:08:35,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:08:36,207 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:36,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:08:36,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542032255] [2022-12-05 21:08:36,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542032255] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:08:36,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114510852] [2022-12-05 21:08:36,207 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 21:08:36,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:36,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:08:36,208 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:08:36,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-12-05 21:08:36,312 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-05 21:08:36,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:08:36,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2022-12-05 21:08:36,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:08:36,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:36,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:08:36,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:36,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114510852] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:08:36,575 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:08:36,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-12-05 21:08:36,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120562953] [2022-12-05 21:08:36,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:08:36,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-05 21:08:36,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:08:36,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-05 21:08:36,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-12-05 21:08:36,576 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 15 [2022-12-05 21:08:36,576 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 566 transitions, 12450 flow. Second operand has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:36,576 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:08:36,576 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 15 [2022-12-05 21:08:36,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:08:37,593 INFO L130 PetriNetUnfolder]: 1516/3058 cut-off events. [2022-12-05 21:08:37,594 INFO L131 PetriNetUnfolder]: For 92084/92086 co-relation queries the response was YES. [2022-12-05 21:08:37,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29944 conditions, 3058 events. 1516/3058 cut-off events. For 92084/92086 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 22399 event pairs, 119 based on Foata normal form. 9/3061 useless extension candidates. Maximal degree in co-relation 29823. Up to 2672 conditions per place. [2022-12-05 21:08:37,628 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 547 selfloop transitions, 104 changer transitions 18/679 dead transitions. [2022-12-05 21:08:37,628 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 679 transitions, 15470 flow [2022-12-05 21:08:37,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-05 21:08:37,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-05 21:08:37,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 99 transitions. [2022-12-05 21:08:37,629 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.55 [2022-12-05 21:08:37,629 INFO L175 Difference]: Start difference. First operand has 333 places, 566 transitions, 12450 flow. Second operand 12 states and 99 transitions. [2022-12-05 21:08:37,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 679 transitions, 15470 flow [2022-12-05 21:08:38,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 679 transitions, 15258 flow, removed 39 selfloop flow, removed 5 redundant places. [2022-12-05 21:08:38,449 INFO L231 Difference]: Finished difference. Result has 348 places, 625 transitions, 13996 flow [2022-12-05 21:08:38,450 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=12248, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=13996, PETRI_PLACES=348, PETRI_TRANSITIONS=625} [2022-12-05 21:08:38,450 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 328 predicate places. [2022-12-05 21:08:38,450 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 625 transitions, 13996 flow [2022-12-05 21:08:38,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:38,450 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:08:38,450 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:08:38,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-12-05 21:08:38,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:38,655 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:08:38,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:08:38,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1244648468, now seen corresponding path program 37 times [2022-12-05 21:08:38,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:08:38,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498539677] [2022-12-05 21:08:38,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:08:38,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:08:38,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:08:38,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:38,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:08:38,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498539677] [2022-12-05 21:08:38,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498539677] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:08:38,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621987823] [2022-12-05 21:08:38,903 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-05 21:08:38,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:38,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:08:38,905 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:08:38,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-12-05 21:08:38,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:08:38,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2022-12-05 21:08:38,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:08:39,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:39,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:08:39,248 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:39,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621987823] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:08:39,249 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:08:39,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2022-12-05 21:08:39,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626035862] [2022-12-05 21:08:39,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:08:39,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-05 21:08:39,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:08:39,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-05 21:08:39,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-12-05 21:08:39,250 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 15 [2022-12-05 21:08:39,250 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 625 transitions, 13996 flow. Second operand has 20 states, 20 states have (on average 4.0) internal successors, (80), 20 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:39,250 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:08:39,250 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 15 [2022-12-05 21:08:39,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:08:40,364 INFO L130 PetriNetUnfolder]: 1607/3235 cut-off events. [2022-12-05 21:08:40,364 INFO L131 PetriNetUnfolder]: For 108315/108317 co-relation queries the response was YES. [2022-12-05 21:08:40,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32751 conditions, 3235 events. 1607/3235 cut-off events. For 108315/108317 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 23915 event pairs, 121 based on Foata normal form. 3/3232 useless extension candidates. Maximal degree in co-relation 32621. Up to 2700 conditions per place. [2022-12-05 21:08:40,396 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 578 selfloop transitions, 127 changer transitions 5/720 dead transitions. [2022-12-05 21:08:40,397 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 720 transitions, 16980 flow [2022-12-05 21:08:40,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-05 21:08:40,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-05 21:08:40,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 94 transitions. [2022-12-05 21:08:40,397 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6266666666666667 [2022-12-05 21:08:40,397 INFO L175 Difference]: Start difference. First operand has 348 places, 625 transitions, 13996 flow. Second operand 10 states and 94 transitions. [2022-12-05 21:08:40,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 720 transitions, 16980 flow [2022-12-05 21:08:41,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 720 transitions, 16548 flow, removed 216 selfloop flow, removed 2 redundant places. [2022-12-05 21:08:41,280 INFO L231 Difference]: Finished difference. Result has 357 places, 665 transitions, 15047 flow [2022-12-05 21:08:41,281 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=13592, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15047, PETRI_PLACES=357, PETRI_TRANSITIONS=665} [2022-12-05 21:08:41,281 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 337 predicate places. [2022-12-05 21:08:41,281 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 665 transitions, 15047 flow [2022-12-05 21:08:41,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.0) internal successors, (80), 20 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:41,281 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:08:41,281 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:08:41,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-12-05 21:08:41,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-12-05 21:08:41,485 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:08:41,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:08:41,486 INFO L85 PathProgramCache]: Analyzing trace with hash 979268318, now seen corresponding path program 38 times [2022-12-05 21:08:41,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:08:41,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985881566] [2022-12-05 21:08:41,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:08:41,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:08:41,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:08:41,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:41,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:08:41,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985881566] [2022-12-05 21:08:41,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985881566] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:08:41,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176107496] [2022-12-05 21:08:41,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 21:08:41,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:41,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:08:41,738 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:08:41,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-12-05 21:08:41,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:08:41,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:08:41,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2022-12-05 21:08:41,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:08:41,945 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:41,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:08:42,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:42,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176107496] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:08:42,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:08:42,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-12-05 21:08:42,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101677961] [2022-12-05 21:08:42,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:08:42,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-05 21:08:42,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:08:42,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-05 21:08:42,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-12-05 21:08:42,106 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 15 [2022-12-05 21:08:42,106 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 665 transitions, 15047 flow. Second operand has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 19 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:42,106 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:08:42,106 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 15 [2022-12-05 21:08:42,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:08:43,323 INFO L130 PetriNetUnfolder]: 1604/3211 cut-off events. [2022-12-05 21:08:43,323 INFO L131 PetriNetUnfolder]: For 111963/111965 co-relation queries the response was YES. [2022-12-05 21:08:43,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32595 conditions, 3211 events. 1604/3211 cut-off events. For 111963/111965 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 23563 event pairs, 116 based on Foata normal form. 6/3211 useless extension candidates. Maximal degree in co-relation 32462. Up to 2700 conditions per place. [2022-12-05 21:08:43,354 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 568 selfloop transitions, 122 changer transitions 15/715 dead transitions. [2022-12-05 21:08:43,354 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 715 transitions, 16919 flow [2022-12-05 21:08:43,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-05 21:08:43,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-05 21:08:43,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 94 transitions. [2022-12-05 21:08:43,355 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5696969696969697 [2022-12-05 21:08:43,355 INFO L175 Difference]: Start difference. First operand has 357 places, 665 transitions, 15047 flow. Second operand 11 states and 94 transitions. [2022-12-05 21:08:43,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 715 transitions, 16919 flow [2022-12-05 21:08:44,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 715 transitions, 16590 flow, removed 129 selfloop flow, removed 3 redundant places. [2022-12-05 21:08:44,313 INFO L231 Difference]: Finished difference. Result has 367 places, 660 transitions, 14967 flow [2022-12-05 21:08:44,313 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=14726, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=543, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14967, PETRI_PLACES=367, PETRI_TRANSITIONS=660} [2022-12-05 21:08:44,313 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 347 predicate places. [2022-12-05 21:08:44,313 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 660 transitions, 14967 flow [2022-12-05 21:08:44,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 19 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:44,314 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:08:44,314 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:08:44,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-12-05 21:08:44,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-12-05 21:08:44,518 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:08:44,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:08:44,518 INFO L85 PathProgramCache]: Analyzing trace with hash 167964114, now seen corresponding path program 39 times [2022-12-05 21:08:44,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:08:44,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549579604] [2022-12-05 21:08:44,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:08:44,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:08:44,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:08:44,764 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:44,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:08:44,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549579604] [2022-12-05 21:08:44,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549579604] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:08:44,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496541345] [2022-12-05 21:08:44,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 21:08:44,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:44,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:08:44,777 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:08:44,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-12-05 21:08:44,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-05 21:08:44,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:08:44,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2022-12-05 21:08:44,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:08:45,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:45,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:08:45,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:45,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496541345] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:08:45,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:08:45,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-12-05 21:08:45,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594645610] [2022-12-05 21:08:45,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:08:45,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-05 21:08:45,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:08:45,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-05 21:08:45,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-12-05 21:08:45,172 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 15 [2022-12-05 21:08:45,172 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 660 transitions, 14967 flow. Second operand has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:45,172 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:08:45,172 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 15 [2022-12-05 21:08:45,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:08:46,318 INFO L130 PetriNetUnfolder]: 1584/3148 cut-off events. [2022-12-05 21:08:46,318 INFO L131 PetriNetUnfolder]: For 109627/109629 co-relation queries the response was YES. [2022-12-05 21:08:46,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32294 conditions, 3148 events. 1584/3148 cut-off events. For 109627/109629 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 22851 event pairs, 115 based on Foata normal form. 5/3147 useless extension candidates. Maximal degree in co-relation 32157. Up to 2758 conditions per place. [2022-12-05 21:08:46,354 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 573 selfloop transitions, 122 changer transitions 5/710 dead transitions. [2022-12-05 21:08:46,355 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 710 transitions, 16910 flow [2022-12-05 21:08:46,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-05 21:08:46,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-05 21:08:46,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 91 transitions. [2022-12-05 21:08:46,355 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5515151515151515 [2022-12-05 21:08:46,355 INFO L175 Difference]: Start difference. First operand has 367 places, 660 transitions, 14967 flow. Second operand 11 states and 91 transitions. [2022-12-05 21:08:46,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 710 transitions, 16910 flow [2022-12-05 21:08:47,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 710 transitions, 16518 flow, removed 120 selfloop flow, removed 6 redundant places. [2022-12-05 21:08:47,358 INFO L231 Difference]: Finished difference. Result has 371 places, 670 transitions, 15193 flow [2022-12-05 21:08:47,359 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=14648, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=660, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15193, PETRI_PLACES=371, PETRI_TRANSITIONS=670} [2022-12-05 21:08:47,359 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 351 predicate places. [2022-12-05 21:08:47,359 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 670 transitions, 15193 flow [2022-12-05 21:08:47,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:47,359 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:08:47,359 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:08:47,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-12-05 21:08:47,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-12-05 21:08:47,564 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:08:47,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:08:47,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1726796928, now seen corresponding path program 40 times [2022-12-05 21:08:47,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:08:47,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667478976] [2022-12-05 21:08:47,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:08:47,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:08:47,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:08:47,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:47,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:08:47,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667478976] [2022-12-05 21:08:47,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667478976] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:08:47,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807032311] [2022-12-05 21:08:47,857 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 21:08:47,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:47,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:08:47,858 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:08:47,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-12-05 21:08:47,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 21:08:47,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:08:47,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2022-12-05 21:08:47,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:08:48,058 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:48,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:08:48,203 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:48,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807032311] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:08:48,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:08:48,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 15 [2022-12-05 21:08:48,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485380640] [2022-12-05 21:08:48,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:08:48,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-05 21:08:48,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:08:48,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-05 21:08:48,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-12-05 21:08:48,204 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 15 [2022-12-05 21:08:48,204 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 670 transitions, 15193 flow. Second operand has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:48,204 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:08:48,204 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 15 [2022-12-05 21:08:48,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:08:49,374 INFO L130 PetriNetUnfolder]: 1629/3230 cut-off events. [2022-12-05 21:08:49,374 INFO L131 PetriNetUnfolder]: For 109731/109733 co-relation queries the response was YES. [2022-12-05 21:08:49,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32855 conditions, 3230 events. 1629/3230 cut-off events. For 109731/109733 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 23502 event pairs, 116 based on Foata normal form. 4/3228 useless extension candidates. Maximal degree in co-relation 32717. Up to 2958 conditions per place. [2022-12-05 21:08:49,408 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 626 selfloop transitions, 75 changer transitions 6/717 dead transitions. [2022-12-05 21:08:49,408 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 717 transitions, 17130 flow [2022-12-05 21:08:49,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-05 21:08:49,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-05 21:08:49,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 72 transitions. [2022-12-05 21:08:49,409 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2022-12-05 21:08:49,409 INFO L175 Difference]: Start difference. First operand has 371 places, 670 transitions, 15193 flow. Second operand 9 states and 72 transitions. [2022-12-05 21:08:49,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 717 transitions, 17130 flow [2022-12-05 21:08:50,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 717 transitions, 16806 flow, removed 45 selfloop flow, removed 8 redundant places. [2022-12-05 21:08:50,335 INFO L231 Difference]: Finished difference. Result has 374 places, 687 transitions, 15484 flow [2022-12-05 21:08:50,336 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=14873, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=595, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15484, PETRI_PLACES=374, PETRI_TRANSITIONS=687} [2022-12-05 21:08:50,336 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 354 predicate places. [2022-12-05 21:08:50,336 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 687 transitions, 15484 flow [2022-12-05 21:08:50,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:50,336 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:08:50,336 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:08:50,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-12-05 21:08:50,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:50,541 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:08:50,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:08:50,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1759042112, now seen corresponding path program 41 times [2022-12-05 21:08:50,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:08:50,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860846905] [2022-12-05 21:08:50,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:08:50,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:08:50,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:08:50,766 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:50,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:08:50,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860846905] [2022-12-05 21:08:50,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860846905] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:08:50,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132820186] [2022-12-05 21:08:50,767 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 21:08:50,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:50,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:08:50,768 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:08:50,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-12-05 21:08:50,855 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-05 21:08:50,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:08:50,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2022-12-05 21:08:50,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:08:50,971 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:50,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:08:51,126 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:51,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132820186] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:08:51,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:08:51,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 16 [2022-12-05 21:08:51,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541726745] [2022-12-05 21:08:51,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:08:51,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-05 21:08:51,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:08:51,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-05 21:08:51,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-12-05 21:08:51,127 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 15 [2022-12-05 21:08:51,127 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 687 transitions, 15484 flow. Second operand has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:51,127 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:08:51,127 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 15 [2022-12-05 21:08:51,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:08:52,318 INFO L130 PetriNetUnfolder]: 1673/3330 cut-off events. [2022-12-05 21:08:52,318 INFO L131 PetriNetUnfolder]: For 115752/115754 co-relation queries the response was YES. [2022-12-05 21:08:52,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33803 conditions, 3330 events. 1673/3330 cut-off events. For 115752/115754 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 24466 event pairs, 118 based on Foata normal form. 4/3328 useless extension candidates. Maximal degree in co-relation 33662. Up to 2975 conditions per place. [2022-12-05 21:08:52,358 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 631 selfloop transitions, 95 changer transitions 7/743 dead transitions. [2022-12-05 21:08:52,358 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 743 transitions, 17612 flow [2022-12-05 21:08:52,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-05 21:08:52,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-05 21:08:52,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 79 transitions. [2022-12-05 21:08:52,359 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5851851851851851 [2022-12-05 21:08:52,359 INFO L175 Difference]: Start difference. First operand has 374 places, 687 transitions, 15484 flow. Second operand 9 states and 79 transitions. [2022-12-05 21:08:52,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 743 transitions, 17612 flow [2022-12-05 21:08:53,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 743 transitions, 17324 flow, removed 93 selfloop flow, removed 5 redundant places. [2022-12-05 21:08:53,570 INFO L231 Difference]: Finished difference. Result has 379 places, 705 transitions, 15873 flow [2022-12-05 21:08:53,571 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=15202, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=687, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=592, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15873, PETRI_PLACES=379, PETRI_TRANSITIONS=705} [2022-12-05 21:08:53,571 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 359 predicate places. [2022-12-05 21:08:53,571 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 705 transitions, 15873 flow [2022-12-05 21:08:53,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:53,571 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:08:53,571 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:08:53,575 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-12-05 21:08:53,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:53,775 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:08:53,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:08:53,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1731654052, now seen corresponding path program 42 times [2022-12-05 21:08:53,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:08:53,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273626875] [2022-12-05 21:08:53,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:08:53,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:08:53,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:08:54,013 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:54,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:08:54,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273626875] [2022-12-05 21:08:54,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273626875] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:08:54,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346010163] [2022-12-05 21:08:54,014 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 21:08:54,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:54,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:08:54,015 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:08:54,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-12-05 21:08:54,106 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-05 21:08:54,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:08:54,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 86 conjunts are in the unsatisfiable core [2022-12-05 21:08:54,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:08:54,227 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:54,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:08:54,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:54,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346010163] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:08:54,369 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:08:54,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 17 [2022-12-05 21:08:54,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130159409] [2022-12-05 21:08:54,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:08:54,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-05 21:08:54,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:08:54,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-05 21:08:54,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-12-05 21:08:54,370 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 15 [2022-12-05 21:08:54,370 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 705 transitions, 15873 flow. Second operand has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 19 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:54,371 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:08:54,371 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 15 [2022-12-05 21:08:54,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:08:55,550 INFO L130 PetriNetUnfolder]: 1660/3289 cut-off events. [2022-12-05 21:08:55,551 INFO L131 PetriNetUnfolder]: For 112949/112951 co-relation queries the response was YES. [2022-12-05 21:08:55,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33393 conditions, 3289 events. 1660/3289 cut-off events. For 112949/112951 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 23952 event pairs, 117 based on Foata normal form. 4/3287 useless extension candidates. Maximal degree in co-relation 33250. Up to 2975 conditions per place. [2022-12-05 21:08:55,586 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 626 selfloop transitions, 94 changer transitions 6/736 dead transitions. [2022-12-05 21:08:55,586 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 736 transitions, 17548 flow [2022-12-05 21:08:55,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-05 21:08:55,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-05 21:08:55,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 71 transitions. [2022-12-05 21:08:55,587 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5916666666666667 [2022-12-05 21:08:55,587 INFO L175 Difference]: Start difference. First operand has 379 places, 705 transitions, 15873 flow. Second operand 8 states and 71 transitions. [2022-12-05 21:08:55,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 736 transitions, 17548 flow [2022-12-05 21:08:56,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 736 transitions, 17336 flow, removed 33 selfloop flow, removed 6 redundant places. [2022-12-05 21:08:56,610 INFO L231 Difference]: Finished difference. Result has 382 places, 707 transitions, 15998 flow [2022-12-05 21:08:56,610 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=15679, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=611, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15998, PETRI_PLACES=382, PETRI_TRANSITIONS=707} [2022-12-05 21:08:56,610 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 362 predicate places. [2022-12-05 21:08:56,611 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 707 transitions, 15998 flow [2022-12-05 21:08:56,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 19 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:56,611 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:08:56,611 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:08:56,615 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-12-05 21:08:56,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:56,815 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:08:56,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:08:56,815 INFO L85 PathProgramCache]: Analyzing trace with hash -508050025, now seen corresponding path program 43 times [2022-12-05 21:08:56,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:08:56,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235390350] [2022-12-05 21:08:56,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:08:56,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:08:56,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:08:56,881 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:56,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:08:56,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235390350] [2022-12-05 21:08:56,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235390350] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:08:56,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405005348] [2022-12-05 21:08:56,882 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-05 21:08:56,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:56,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:08:56,883 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:08:56,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-12-05 21:08:56,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:08:56,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-05 21:08:56,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:08:57,032 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:57,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:08:57,065 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:57,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405005348] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:08:57,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:08:57,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-12-05 21:08:57,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230514284] [2022-12-05 21:08:57,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:08:57,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-05 21:08:57,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:08:57,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-05 21:08:57,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-12-05 21:08:57,066 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:08:57,066 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 707 transitions, 15998 flow. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:57,066 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:08:57,066 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:08:57,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:08:58,525 INFO L130 PetriNetUnfolder]: 2123/4258 cut-off events. [2022-12-05 21:08:58,525 INFO L131 PetriNetUnfolder]: For 150579/150579 co-relation queries the response was YES. [2022-12-05 21:08:58,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43160 conditions, 4258 events. 2123/4258 cut-off events. For 150579/150579 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 32422 event pairs, 313 based on Foata normal form. 4/4262 useless extension candidates. Maximal degree in co-relation 43015. Up to 1437 conditions per place. [2022-12-05 21:08:58,578 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 543 selfloop transitions, 401 changer transitions 15/959 dead transitions. [2022-12-05 21:08:58,578 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 959 transitions, 23380 flow [2022-12-05 21:08:58,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-05 21:08:58,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-05 21:08:58,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 75 transitions. [2022-12-05 21:08:58,579 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2022-12-05 21:08:58,579 INFO L175 Difference]: Start difference. First operand has 382 places, 707 transitions, 15998 flow. Second operand 14 states and 75 transitions. [2022-12-05 21:08:58,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 959 transitions, 23380 flow [2022-12-05 21:09:00,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 959 transitions, 23071 flow, removed 60 selfloop flow, removed 5 redundant places. [2022-12-05 21:09:00,096 INFO L231 Difference]: Finished difference. Result has 395 places, 853 transitions, 20836 flow [2022-12-05 21:09:00,097 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=15776, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=20836, PETRI_PLACES=395, PETRI_TRANSITIONS=853} [2022-12-05 21:09:00,097 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 375 predicate places. [2022-12-05 21:09:00,097 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 853 transitions, 20836 flow [2022-12-05 21:09:00,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:09:00,097 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:09:00,097 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:09:00,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-12-05 21:09:00,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-12-05 21:09:00,301 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:09:00,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:09:00,301 INFO L85 PathProgramCache]: Analyzing trace with hash -254170462, now seen corresponding path program 44 times [2022-12-05 21:09:00,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:09:00,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82579410] [2022-12-05 21:09:00,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:09:00,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:09:00,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:09:00,361 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:09:00,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:09:00,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82579410] [2022-12-05 21:09:00,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82579410] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:09:00,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112775341] [2022-12-05 21:09:00,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 21:09:00,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:09:00,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:09:00,363 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:09:00,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-12-05 21:09:00,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:09:00,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:09:00,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-05 21:09:00,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:09:00,509 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:09:00,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:09:00,553 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:09:00,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112775341] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:09:00,553 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:09:00,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-12-05 21:09:00,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472269434] [2022-12-05 21:09:00,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:09:00,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-05 21:09:00,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:09:00,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-05 21:09:00,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-12-05 21:09:00,555 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:09:00,555 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 853 transitions, 20836 flow. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:09:00,555 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:09:00,555 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:09:00,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:09:02,369 INFO L130 PetriNetUnfolder]: 2273/4522 cut-off events. [2022-12-05 21:09:02,369 INFO L131 PetriNetUnfolder]: For 177280/177280 co-relation queries the response was YES. [2022-12-05 21:09:02,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47783 conditions, 4522 events. 2273/4522 cut-off events. For 177280/177280 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 34777 event pairs, 194 based on Foata normal form. 36/4558 useless extension candidates. Maximal degree in co-relation 47633. Up to 2527 conditions per place. [2022-12-05 21:09:02,423 INFO L137 encePairwiseOnDemand]: 10/15 looper letters, 698 selfloop transitions, 296 changer transitions 0/994 dead transitions. [2022-12-05 21:09:02,423 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 994 transitions, 25466 flow [2022-12-05 21:09:02,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-05 21:09:02,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-05 21:09:02,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 66 transitions. [2022-12-05 21:09:02,424 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2022-12-05 21:09:02,424 INFO L175 Difference]: Start difference. First operand has 395 places, 853 transitions, 20836 flow. Second operand 9 states and 66 transitions. [2022-12-05 21:09:02,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 994 transitions, 25466 flow [2022-12-05 21:09:04,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 994 transitions, 24560 flow, removed 260 selfloop flow, removed 9 redundant places. [2022-12-05 21:09:04,131 INFO L231 Difference]: Finished difference. Result has 395 places, 896 transitions, 21784 flow [2022-12-05 21:09:04,131 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=19932, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=853, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=21784, PETRI_PLACES=395, PETRI_TRANSITIONS=896} [2022-12-05 21:09:04,132 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 375 predicate places. [2022-12-05 21:09:04,132 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 896 transitions, 21784 flow [2022-12-05 21:09:04,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:09:04,132 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:09:04,132 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:09:04,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-12-05 21:09:04,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-12-05 21:09:04,336 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:09:04,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:09:04,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1072399648, now seen corresponding path program 45 times [2022-12-05 21:09:04,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:09:04,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432199352] [2022-12-05 21:09:04,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:09:04,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:09:04,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:09:04,397 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:09:04,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:09:04,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432199352] [2022-12-05 21:09:04,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432199352] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:09:04,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823891576] [2022-12-05 21:09:04,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 21:09:04,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:09:04,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:09:04,399 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:09:04,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-12-05 21:09:04,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-05 21:09:04,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:09:04,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-05 21:09:04,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:09:04,550 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:09:04,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:09:04,581 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:09:04,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823891576] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:09:04,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:09:04,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-12-05 21:09:04,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128574663] [2022-12-05 21:09:04,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:09:04,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-05 21:09:04,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:09:04,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-05 21:09:04,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-12-05 21:09:04,582 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:09:04,582 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 896 transitions, 21784 flow. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:09:04,582 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:09:04,582 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:09:04,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:09:06,751 INFO L130 PetriNetUnfolder]: 2560/5107 cut-off events. [2022-12-05 21:09:06,751 INFO L131 PetriNetUnfolder]: For 207285/207285 co-relation queries the response was YES. [2022-12-05 21:09:06,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54915 conditions, 5107 events. 2560/5107 cut-off events. For 207285/207285 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 40404 event pairs, 44 based on Foata normal form. 28/5135 useless extension candidates. Maximal degree in co-relation 54765. Up to 1387 conditions per place. [2022-12-05 21:09:06,811 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 601 selfloop transitions, 484 changer transitions 3/1088 dead transitions. [2022-12-05 21:09:06,812 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 1088 transitions, 27911 flow [2022-12-05 21:09:06,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-05 21:09:06,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-12-05 21:09:06,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 167 transitions. [2022-12-05 21:09:06,812 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3711111111111111 [2022-12-05 21:09:06,812 INFO L175 Difference]: Start difference. First operand has 395 places, 896 transitions, 21784 flow. Second operand 30 states and 167 transitions. [2022-12-05 21:09:06,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 1088 transitions, 27911 flow [2022-12-05 21:09:08,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 1088 transitions, 27355 flow, removed 96 selfloop flow, removed 4 redundant places. [2022-12-05 21:09:08,734 INFO L231 Difference]: Finished difference. Result has 433 places, 997 transitions, 25872 flow [2022-12-05 21:09:08,734 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=21255, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=894, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=400, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=25872, PETRI_PLACES=433, PETRI_TRANSITIONS=997} [2022-12-05 21:09:08,735 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 413 predicate places. [2022-12-05 21:09:08,735 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 997 transitions, 25872 flow [2022-12-05 21:09:08,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:09:08,735 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:09:08,735 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:09:08,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-12-05 21:09:08,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-12-05 21:09:08,940 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:09:08,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:09:08,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1387860031, now seen corresponding path program 46 times [2022-12-05 21:09:08,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:09:08,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251709357] [2022-12-05 21:09:08,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:09:08,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:09:08,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:09:08,998 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:09:08,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:09:08,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251709357] [2022-12-05 21:09:08,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251709357] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:09:08,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571908125] [2022-12-05 21:09:08,999 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 21:09:08,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:09:08,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:09:09,000 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:09:09,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-12-05 21:09:09,094 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 21:09:09,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:09:09,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-05 21:09:09,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:09:09,143 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:09:09,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:09:09,174 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:09:09,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571908125] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:09:09,174 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:09:09,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-12-05 21:09:09,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439671012] [2022-12-05 21:09:09,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:09:09,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-05 21:09:09,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:09:09,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-05 21:09:09,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-12-05 21:09:09,175 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:09:09,175 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 997 transitions, 25872 flow. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:09:09,175 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:09:09,175 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:09:09,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:09:11,874 INFO L130 PetriNetUnfolder]: 2565/5156 cut-off events. [2022-12-05 21:09:11,875 INFO L131 PetriNetUnfolder]: For 240176/240176 co-relation queries the response was YES. [2022-12-05 21:09:11,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57942 conditions, 5156 events. 2565/5156 cut-off events. For 240176/240176 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 41092 event pairs, 405 based on Foata normal form. 24/5180 useless extension candidates. Maximal degree in co-relation 57779. Up to 2097 conditions per place. [2022-12-05 21:09:11,939 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 652 selfloop transitions, 480 changer transitions 12/1144 dead transitions. [2022-12-05 21:09:11,939 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 1144 transitions, 30514 flow [2022-12-05 21:09:11,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-05 21:09:11,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-05 21:09:11,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 131 transitions. [2022-12-05 21:09:11,940 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.33589743589743587 [2022-12-05 21:09:11,940 INFO L175 Difference]: Start difference. First operand has 433 places, 997 transitions, 25872 flow. Second operand 26 states and 131 transitions. [2022-12-05 21:09:11,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 1144 transitions, 30514 flow [2022-12-05 21:09:14,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 1144 transitions, 28598 flow, removed 823 selfloop flow, removed 10 redundant places. [2022-12-05 21:09:14,702 INFO L231 Difference]: Finished difference. Result has 453 places, 1009 transitions, 25519 flow [2022-12-05 21:09:14,703 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=23949, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=995, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=458, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=25519, PETRI_PLACES=453, PETRI_TRANSITIONS=1009} [2022-12-05 21:09:14,703 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 433 predicate places. [2022-12-05 21:09:14,703 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 1009 transitions, 25519 flow [2022-12-05 21:09:14,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:09:14,704 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:09:14,704 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:09:14,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-12-05 21:09:14,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-12-05 21:09:14,908 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:09:14,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:09:14,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1571033471, now seen corresponding path program 47 times [2022-12-05 21:09:14,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:09:14,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037986430] [2022-12-05 21:09:14,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:09:14,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:09:14,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:09:14,965 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:09:14,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:09:14,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037986430] [2022-12-05 21:09:14,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037986430] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:09:14,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716169462] [2022-12-05 21:09:14,966 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 21:09:14,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:09:14,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:09:14,976 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:09:14,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-12-05 21:09:15,055 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:09:15,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:09:15,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-05 21:09:15,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:09:15,102 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:09:15,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:09:15,140 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:09:15,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716169462] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:09:15,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:09:15,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-12-05 21:09:15,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366421410] [2022-12-05 21:09:15,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:09:15,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-05 21:09:15,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:09:15,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-05 21:09:15,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-12-05 21:09:15,141 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:09:15,142 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 1009 transitions, 25519 flow. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:09:15,142 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:09:15,142 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:09:15,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:09:17,885 INFO L130 PetriNetUnfolder]: 2819/5650 cut-off events. [2022-12-05 21:09:17,885 INFO L131 PetriNetUnfolder]: For 254582/254582 co-relation queries the response was YES. [2022-12-05 21:09:17,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62172 conditions, 5650 events. 2819/5650 cut-off events. For 254582/254582 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 45740 event pairs, 352 based on Foata normal form. 40/5690 useless extension candidates. Maximal degree in co-relation 62005. Up to 1848 conditions per place. [2022-12-05 21:09:17,959 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 670 selfloop transitions, 572 changer transitions 12/1254 dead transitions. [2022-12-05 21:09:17,959 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 1254 transitions, 32732 flow [2022-12-05 21:09:17,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-05 21:09:17,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-12-05 21:09:17,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 144 transitions. [2022-12-05 21:09:17,960 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.35555555555555557 [2022-12-05 21:09:17,960 INFO L175 Difference]: Start difference. First operand has 453 places, 1009 transitions, 25519 flow. Second operand 27 states and 144 transitions. [2022-12-05 21:09:17,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 1254 transitions, 32732 flow [2022-12-05 21:09:20,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 1254 transitions, 31901 flow, removed 110 selfloop flow, removed 11 redundant places. [2022-12-05 21:09:20,734 INFO L231 Difference]: Finished difference. Result has 471 places, 1079 transitions, 28285 flow [2022-12-05 21:09:20,735 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=24461, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=997, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=481, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=28285, PETRI_PLACES=471, PETRI_TRANSITIONS=1079} [2022-12-05 21:09:20,735 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 451 predicate places. [2022-12-05 21:09:20,736 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 1079 transitions, 28285 flow [2022-12-05 21:09:20,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:09:20,736 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:09:20,736 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:09:20,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-12-05 21:09:20,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-12-05 21:09:20,940 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:09:20,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:09:20,941 INFO L85 PathProgramCache]: Analyzing trace with hash 844929572, now seen corresponding path program 48 times [2022-12-05 21:09:20,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:09:20,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630746086] [2022-12-05 21:09:20,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:09:20,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:09:20,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:09:21,005 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:09:21,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:09:21,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630746086] [2022-12-05 21:09:21,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630746086] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:09:21,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873232050] [2022-12-05 21:09:21,005 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 21:09:21,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:09:21,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:09:21,021 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:09:21,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-12-05 21:09:21,137 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-05 21:09:21,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:09:21,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-05 21:09:21,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:09:21,189 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:09:21,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:09:21,278 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:09:21,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873232050] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:09:21,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:09:21,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-12-05 21:09:21,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624088814] [2022-12-05 21:09:21,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:09:21,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-05 21:09:21,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:09:21,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-05 21:09:21,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-12-05 21:09:21,279 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:09:21,279 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 1079 transitions, 28285 flow. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:09:21,279 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:09:21,279 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:09:21,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:09:24,123 INFO L130 PetriNetUnfolder]: 2880/5727 cut-off events. [2022-12-05 21:09:24,123 INFO L131 PetriNetUnfolder]: For 273234/273234 co-relation queries the response was YES. [2022-12-05 21:09:24,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64449 conditions, 5727 events. 2880/5727 cut-off events. For 273234/273234 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 46117 event pairs, 246 based on Foata normal form. 62/5789 useless extension candidates. Maximal degree in co-relation 64279. Up to 4828 conditions per place. [2022-12-05 21:09:24,278 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 948 selfloop transitions, 218 changer transitions 0/1166 dead transitions. [2022-12-05 21:09:24,278 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 1166 transitions, 32076 flow [2022-12-05 21:09:24,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-05 21:09:24,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-05 21:09:24,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 89 transitions. [2022-12-05 21:09:24,279 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2022-12-05 21:09:24,279 INFO L175 Difference]: Start difference. First operand has 471 places, 1079 transitions, 28285 flow. Second operand 14 states and 89 transitions. [2022-12-05 21:09:24,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 1166 transitions, 32076 flow [2022-12-05 21:09:27,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 1166 transitions, 30958 flow, removed 276 selfloop flow, removed 18 redundant places. [2022-12-05 21:09:27,427 INFO L231 Difference]: Finished difference. Result has 468 places, 1102 transitions, 28243 flow [2022-12-05 21:09:27,428 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=27004, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1073, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=855, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=28243, PETRI_PLACES=468, PETRI_TRANSITIONS=1102} [2022-12-05 21:09:27,428 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 448 predicate places. [2022-12-05 21:09:27,428 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 1102 transitions, 28243 flow [2022-12-05 21:09:27,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:09:27,428 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:09:27,428 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:09:27,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-12-05 21:09:27,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-12-05 21:09:27,633 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:09:27,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:09:27,633 INFO L85 PathProgramCache]: Analyzing trace with hash 805830206, now seen corresponding path program 49 times [2022-12-05 21:09:27,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:09:27,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409102741] [2022-12-05 21:09:27,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:09:27,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:09:27,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:09:27,692 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:09:27,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:09:27,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409102741] [2022-12-05 21:09:27,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409102741] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:09:27,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318902715] [2022-12-05 21:09:27,693 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-05 21:09:27,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:09:27,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:09:27,694 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:09:27,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-12-05 21:09:27,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:09:27,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-05 21:09:27,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:09:27,846 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:09:27,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:09:27,879 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:09:27,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318902715] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:09:27,880 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:09:27,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-12-05 21:09:27,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442088520] [2022-12-05 21:09:27,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:09:27,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-05 21:09:27,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:09:27,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-05 21:09:27,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-12-05 21:09:27,880 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:09:27,880 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 1102 transitions, 28243 flow. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:09:27,880 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:09:27,880 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:09:27,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:09:30,650 INFO L130 PetriNetUnfolder]: 2861/5682 cut-off events. [2022-12-05 21:09:30,650 INFO L131 PetriNetUnfolder]: For 259913/259913 co-relation queries the response was YES. [2022-12-05 21:09:30,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63003 conditions, 5682 events. 2861/5682 cut-off events. For 259913/259913 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 45612 event pairs, 180 based on Foata normal form. 68/5750 useless extension candidates. Maximal degree in co-relation 62830. Up to 3501 conditions per place. [2022-12-05 21:09:30,718 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 783 selfloop transitions, 391 changer transitions 0/1174 dead transitions. [2022-12-05 21:09:30,718 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 1174 transitions, 31337 flow [2022-12-05 21:09:30,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-05 21:09:30,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-05 21:09:30,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 135 transitions. [2022-12-05 21:09:30,719 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2022-12-05 21:09:30,719 INFO L175 Difference]: Start difference. First operand has 468 places, 1102 transitions, 28243 flow. Second operand 22 states and 135 transitions. [2022-12-05 21:09:30,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 1174 transitions, 31337 flow [2022-12-05 21:09:33,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 1174 transitions, 30789 flow, removed 100 selfloop flow, removed 8 redundant places. [2022-12-05 21:09:33,747 INFO L231 Difference]: Finished difference. Result has 483 places, 1096 transitions, 28474 flow [2022-12-05 21:09:33,748 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=27295, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1088, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=383, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=700, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=28474, PETRI_PLACES=483, PETRI_TRANSITIONS=1096} [2022-12-05 21:09:33,748 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 463 predicate places. [2022-12-05 21:09:33,748 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 1096 transitions, 28474 flow [2022-12-05 21:09:33,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:09:33,748 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:09:33,748 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:09:33,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-12-05 21:09:33,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:09:33,953 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:09:33,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:09:33,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1740974941, now seen corresponding path program 50 times [2022-12-05 21:09:33,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:09:33,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337945602] [2022-12-05 21:09:33,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:09:33,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:09:33,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:09:34,009 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:09:34,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:09:34,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337945602] [2022-12-05 21:09:34,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337945602] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:09:34,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562205861] [2022-12-05 21:09:34,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 21:09:34,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:09:34,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:09:34,011 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:09:34,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-12-05 21:09:34,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:09:34,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:09:34,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-05 21:09:34,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:09:34,153 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:09:34,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:09:34,184 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:09:34,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562205861] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:09:34,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:09:34,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-12-05 21:09:34,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505073479] [2022-12-05 21:09:34,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:09:34,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-05 21:09:34,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:09:34,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-05 21:09:34,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-12-05 21:09:34,185 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:09:34,185 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 1096 transitions, 28474 flow. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:09:34,185 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:09:34,185 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:09:34,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:09:37,363 INFO L130 PetriNetUnfolder]: 3096/6195 cut-off events. [2022-12-05 21:09:37,363 INFO L131 PetriNetUnfolder]: For 304956/304956 co-relation queries the response was YES. [2022-12-05 21:09:37,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70257 conditions, 6195 events. 3096/6195 cut-off events. For 304956/304956 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 50445 event pairs, 398 based on Foata normal form. 76/6271 useless extension candidates. Maximal degree in co-relation 70084. Up to 1984 conditions per place. [2022-12-05 21:09:37,441 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 697 selfloop transitions, 636 changer transitions 8/1341 dead transitions. [2022-12-05 21:09:37,441 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 1341 transitions, 36267 flow [2022-12-05 21:09:37,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-05 21:09:37,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-12-05 21:09:37,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 161 transitions. [2022-12-05 21:09:37,442 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.34623655913978496 [2022-12-05 21:09:37,442 INFO L175 Difference]: Start difference. First operand has 483 places, 1096 transitions, 28474 flow. Second operand 31 states and 161 transitions. [2022-12-05 21:09:37,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 1341 transitions, 36267 flow [2022-12-05 21:09:40,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 1341 transitions, 35638 flow, removed 91 selfloop flow, removed 15 redundant places. [2022-12-05 21:09:40,847 INFO L231 Difference]: Finished difference. Result has 501 places, 1165 transitions, 32161 flow [2022-12-05 21:09:40,848 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=27412, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1077, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=544, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=32161, PETRI_PLACES=501, PETRI_TRANSITIONS=1165} [2022-12-05 21:09:40,848 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 481 predicate places. [2022-12-05 21:09:40,849 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 1165 transitions, 32161 flow [2022-12-05 21:09:40,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:09:40,849 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:09:40,849 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:09:40,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-12-05 21:09:41,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:09:41,053 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:09:41,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:09:41,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1695063687, now seen corresponding path program 51 times [2022-12-05 21:09:41,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:09:41,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135123959] [2022-12-05 21:09:41,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:09:41,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:09:41,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:09:41,115 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:09:41,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:09:41,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135123959] [2022-12-05 21:09:41,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135123959] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:09:41,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155309663] [2022-12-05 21:09:41,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 21:09:41,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:09:41,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:09:41,128 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:09:41,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-12-05 21:09:41,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-05 21:09:41,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:09:41,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-05 21:09:41,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:09:41,282 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:09:41,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:09:41,320 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:09:41,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155309663] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:09:41,320 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:09:41,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-12-05 21:09:41,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606040294] [2022-12-05 21:09:41,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:09:41,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-05 21:09:41,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:09:41,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-05 21:09:41,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-12-05 21:09:41,321 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:09:41,321 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 1165 transitions, 32161 flow. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:09:41,321 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:09:41,321 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:09:41,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:09:44,646 INFO L130 PetriNetUnfolder]: 3089/6180 cut-off events. [2022-12-05 21:09:44,646 INFO L131 PetriNetUnfolder]: For 334399/334399 co-relation queries the response was YES. [2022-12-05 21:09:44,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73178 conditions, 6180 events. 3089/6180 cut-off events. For 334399/334399 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 50354 event pairs, 591 based on Foata normal form. 36/6216 useless extension candidates. Maximal degree in co-relation 73000. Up to 2881 conditions per place. [2022-12-05 21:09:44,731 INFO L137 encePairwiseOnDemand]: 10/15 looper letters, 794 selfloop transitions, 505 changer transitions 1/1300 dead transitions. [2022-12-05 21:09:44,731 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 1300 transitions, 37356 flow [2022-12-05 21:09:44,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-05 21:09:44,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-05 21:09:44,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 124 transitions. [2022-12-05 21:09:44,731 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.37575757575757573 [2022-12-05 21:09:44,732 INFO L175 Difference]: Start difference. First operand has 501 places, 1165 transitions, 32161 flow. Second operand 22 states and 124 transitions. [2022-12-05 21:09:44,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 1300 transitions, 37356 flow [2022-12-05 21:09:48,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 1300 transitions, 35757 flow, removed 484 selfloop flow, removed 21 redundant places. [2022-12-05 21:09:48,774 INFO L231 Difference]: Finished difference. Result has 503 places, 1181 transitions, 32312 flow [2022-12-05 21:09:48,775 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=30391, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=482, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=659, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=32312, PETRI_PLACES=503, PETRI_TRANSITIONS=1181} [2022-12-05 21:09:48,775 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 483 predicate places. [2022-12-05 21:09:48,775 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 1181 transitions, 32312 flow [2022-12-05 21:09:48,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:09:48,776 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:09:48,776 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:09:48,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-12-05 21:09:48,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:09:48,980 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:09:48,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:09:48,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1753377496, now seen corresponding path program 52 times [2022-12-05 21:09:48,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:09:48,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236361527] [2022-12-05 21:09:48,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:09:48,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:09:48,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:09:49,039 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:09:49,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:09:49,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236361527] [2022-12-05 21:09:49,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236361527] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:09:49,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795228278] [2022-12-05 21:09:49,040 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 21:09:49,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:09:49,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:09:49,041 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:09:49,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-12-05 21:09:49,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 21:09:49,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:09:49,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-05 21:09:49,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:09:49,203 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:09:49,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:09:49,237 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:09:49,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795228278] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:09:49,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:09:49,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2022-12-05 21:09:49,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867508953] [2022-12-05 21:09:49,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:09:49,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-05 21:09:49,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:09:49,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-05 21:09:49,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2022-12-05 21:09:49,238 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:09:49,238 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 1181 transitions, 32312 flow. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:09:49,239 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:09:49,239 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:09:49,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:09:53,053 INFO L130 PetriNetUnfolder]: 3546/7141 cut-off events. [2022-12-05 21:09:53,053 INFO L131 PetriNetUnfolder]: For 385450/385450 co-relation queries the response was YES. [2022-12-05 21:09:53,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84433 conditions, 7141 events. 3546/7141 cut-off events. For 385450/385450 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 60143 event pairs, 150 based on Foata normal form. 166/7307 useless extension candidates. Maximal degree in co-relation 84252. Up to 3004 conditions per place. [2022-12-05 21:09:53,153 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 853 selfloop transitions, 604 changer transitions 1/1458 dead transitions. [2022-12-05 21:09:53,153 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 1458 transitions, 42585 flow [2022-12-05 21:09:53,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-05 21:09:53,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-05 21:09:53,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 145 transitions. [2022-12-05 21:09:53,154 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.42028985507246375 [2022-12-05 21:09:53,154 INFO L175 Difference]: Start difference. First operand has 503 places, 1181 transitions, 32312 flow. Second operand 23 states and 145 transitions. [2022-12-05 21:09:53,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 1458 transitions, 42585 flow [2022-12-05 21:09:57,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 516 places, 1458 transitions, 41734 flow, removed 253 selfloop flow, removed 9 redundant places. [2022-12-05 21:09:57,822 INFO L231 Difference]: Finished difference. Result has 521 places, 1313 transitions, 37795 flow [2022-12-05 21:09:57,823 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=31377, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=474, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=657, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=37795, PETRI_PLACES=521, PETRI_TRANSITIONS=1313} [2022-12-05 21:09:57,823 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 501 predicate places. [2022-12-05 21:09:57,824 INFO L495 AbstractCegarLoop]: Abstraction has has 521 places, 1313 transitions, 37795 flow [2022-12-05 21:09:57,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:09:57,824 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:09:57,824 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:09:57,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-12-05 21:09:58,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2022-12-05 21:09:58,024 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:09:58,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:09:58,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1754566788, now seen corresponding path program 53 times [2022-12-05 21:09:58,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:09:58,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891369876] [2022-12-05 21:09:58,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:09:58,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:09:58,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:09:58,080 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:09:58,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:09:58,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891369876] [2022-12-05 21:09:58,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891369876] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:09:58,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902566520] [2022-12-05 21:09:58,081 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 21:09:58,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:09:58,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:09:58,082 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:09:58,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-12-05 21:09:58,178 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-05 21:09:58,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:09:58,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-05 21:09:58,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:09:58,227 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:09:58,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:09:58,259 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:09:58,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902566520] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:09:58,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:09:58,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2022-12-05 21:09:58,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810114575] [2022-12-05 21:09:58,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:09:58,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-05 21:09:58,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:09:58,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-05 21:09:58,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2022-12-05 21:09:58,260 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:09:58,260 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 521 places, 1313 transitions, 37795 flow. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:09:58,260 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:09:58,260 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:09:58,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:10:02,516 INFO L130 PetriNetUnfolder]: 3497/7016 cut-off events. [2022-12-05 21:10:02,516 INFO L131 PetriNetUnfolder]: For 385674/385674 co-relation queries the response was YES. [2022-12-05 21:10:02,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85634 conditions, 7016 events. 3497/7016 cut-off events. For 385674/385674 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 58763 event pairs, 156 based on Foata normal form. 40/7056 useless extension candidates. Maximal degree in co-relation 85448. Up to 2280 conditions per place. [2022-12-05 21:10:02,609 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 750 selfloop transitions, 670 changer transitions 6/1426 dead transitions. [2022-12-05 21:10:02,609 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 552 places, 1426 transitions, 42615 flow [2022-12-05 21:10:02,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-05 21:10:02,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-12-05 21:10:02,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 153 transitions. [2022-12-05 21:10:02,610 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.31875 [2022-12-05 21:10:02,610 INFO L175 Difference]: Start difference. First operand has 521 places, 1313 transitions, 37795 flow. Second operand 32 states and 153 transitions. [2022-12-05 21:10:02,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 552 places, 1426 transitions, 42615 flow [2022-12-05 21:10:07,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 535 places, 1426 transitions, 41480 flow, removed 344 selfloop flow, removed 17 redundant places. [2022-12-05 21:10:07,571 INFO L231 Difference]: Finished difference. Result has 537 places, 1316 transitions, 38330 flow [2022-12-05 21:10:07,572 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=35769, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=640, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=641, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=38330, PETRI_PLACES=537, PETRI_TRANSITIONS=1316} [2022-12-05 21:10:07,572 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 517 predicate places. [2022-12-05 21:10:07,573 INFO L495 AbstractCegarLoop]: Abstraction has has 537 places, 1316 transitions, 38330 flow [2022-12-05 21:10:07,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:10:07,573 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:10:07,573 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:10:07,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-12-05 21:10:07,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2022-12-05 21:10:07,777 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:10:07,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:10:07,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1791434840, now seen corresponding path program 54 times [2022-12-05 21:10:07,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:10:07,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340138231] [2022-12-05 21:10:07,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:10:07,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:10:07,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:10:07,837 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:10:07,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:10:07,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340138231] [2022-12-05 21:10:07,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340138231] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:10:07,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933482860] [2022-12-05 21:10:07,838 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 21:10:07,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:10:07,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:10:07,839 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:10:07,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-12-05 21:10:07,941 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-05 21:10:07,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:10:07,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-05 21:10:07,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:10:07,991 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:10:07,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:10:08,031 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:10:08,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933482860] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:10:08,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:10:08,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-12-05 21:10:08,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574379582] [2022-12-05 21:10:08,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:10:08,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-05 21:10:08,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:10:08,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-05 21:10:08,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-12-05 21:10:08,032 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:10:08,032 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 537 places, 1316 transitions, 38330 flow. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:10:08,032 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:10:08,032 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:10:08,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:10:11,976 INFO L130 PetriNetUnfolder]: 3569/7128 cut-off events. [2022-12-05 21:10:11,976 INFO L131 PetriNetUnfolder]: For 381901/381901 co-relation queries the response was YES. [2022-12-05 21:10:12,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88747 conditions, 7128 events. 3569/7128 cut-off events. For 381901/381901 co-relation queries the response was YES. Maximal size of possible extension queue 603. Compared 59575 event pairs, 154 based on Foata normal form. 14/7142 useless extension candidates. Maximal degree in co-relation 88564. Up to 2296 conditions per place. [2022-12-05 21:10:12,082 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 740 selfloop transitions, 686 changer transitions 9/1435 dead transitions. [2022-12-05 21:10:12,082 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 565 places, 1435 transitions, 44120 flow [2022-12-05 21:10:12,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-05 21:10:12,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-12-05 21:10:12,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 138 transitions. [2022-12-05 21:10:12,083 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.30666666666666664 [2022-12-05 21:10:12,083 INFO L175 Difference]: Start difference. First operand has 537 places, 1316 transitions, 38330 flow. Second operand 30 states and 138 transitions. [2022-12-05 21:10:12,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 565 places, 1435 transitions, 44120 flow [2022-12-05 21:10:17,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 552 places, 1435 transitions, 42455 flow, removed 689 selfloop flow, removed 13 redundant places. [2022-12-05 21:10:17,154 INFO L231 Difference]: Finished difference. Result has 559 places, 1346 transitions, 40343 flow [2022-12-05 21:10:17,154 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=37004, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=645, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=636, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=40343, PETRI_PLACES=559, PETRI_TRANSITIONS=1346} [2022-12-05 21:10:17,155 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 539 predicate places. [2022-12-05 21:10:17,155 INFO L495 AbstractCegarLoop]: Abstraction has has 559 places, 1346 transitions, 40343 flow [2022-12-05 21:10:17,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:10:17,155 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:10:17,155 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:10:17,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-12-05 21:10:17,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:10:17,359 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:10:17,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:10:17,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1463779700, now seen corresponding path program 55 times [2022-12-05 21:10:17,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:10:17,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842187585] [2022-12-05 21:10:17,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:10:17,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:10:17,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:10:17,431 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:10:17,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:10:17,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842187585] [2022-12-05 21:10:17,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842187585] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:10:17,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660899047] [2022-12-05 21:10:17,432 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-05 21:10:17,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:10:17,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:10:17,433 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:10:17,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-12-05 21:10:17,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:10:17,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-05 21:10:17,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:10:17,586 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:10:17,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:10:17,618 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:10:17,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660899047] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:10:17,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:10:17,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2022-12-05 21:10:17,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821644184] [2022-12-05 21:10:17,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:10:17,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-05 21:10:17,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:10:17,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-05 21:10:17,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2022-12-05 21:10:17,619 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:10:17,619 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 559 places, 1346 transitions, 40343 flow. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:10:17,619 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:10:17,619 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:10:17,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:10:22,175 INFO L130 PetriNetUnfolder]: 3850/7749 cut-off events. [2022-12-05 21:10:22,175 INFO L131 PetriNetUnfolder]: For 442854/442854 co-relation queries the response was YES. [2022-12-05 21:10:22,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98667 conditions, 7749 events. 3850/7749 cut-off events. For 442854/442854 co-relation queries the response was YES. Maximal size of possible extension queue 657. Compared 66205 event pairs, 190 based on Foata normal form. 34/7783 useless extension candidates. Maximal degree in co-relation 98480. Up to 2196 conditions per place. [2022-12-05 21:10:22,291 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 751 selfloop transitions, 806 changer transitions 10/1567 dead transitions. [2022-12-05 21:10:22,291 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 590 places, 1567 transitions, 49805 flow [2022-12-05 21:10:22,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-05 21:10:22,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-12-05 21:10:22,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 165 transitions. [2022-12-05 21:10:22,292 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3235294117647059 [2022-12-05 21:10:22,292 INFO L175 Difference]: Start difference. First operand has 559 places, 1346 transitions, 40343 flow. Second operand 34 states and 165 transitions. [2022-12-05 21:10:22,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 590 places, 1567 transitions, 49805 flow [2022-12-05 21:10:27,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 579 places, 1567 transitions, 49276 flow, removed 179 selfloop flow, removed 11 redundant places. [2022-12-05 21:10:27,942 INFO L231 Difference]: Finished difference. Result has 585 places, 1443 transitions, 46451 flow [2022-12-05 21:10:27,943 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=39716, PETRI_DIFFERENCE_MINUEND_PLACES=546, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=720, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=581, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=46451, PETRI_PLACES=585, PETRI_TRANSITIONS=1443} [2022-12-05 21:10:27,943 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 565 predicate places. [2022-12-05 21:10:27,943 INFO L495 AbstractCegarLoop]: Abstraction has has 585 places, 1443 transitions, 46451 flow [2022-12-05 21:10:27,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:10:27,943 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:10:27,944 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:10:27,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-12-05 21:10:28,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:10:28,148 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:10:28,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:10:28,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1160342206, now seen corresponding path program 56 times [2022-12-05 21:10:28,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:10:28,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647620283] [2022-12-05 21:10:28,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:10:28,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:10:28,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:10:28,218 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:10:28,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:10:28,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647620283] [2022-12-05 21:10:28,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647620283] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:10:28,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486080588] [2022-12-05 21:10:28,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 21:10:28,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:10:28,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:10:28,220 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:10:28,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-12-05 21:10:28,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:10:28,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:10:28,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-05 21:10:28,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:10:28,376 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:10:28,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:10:28,479 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:10:28,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486080588] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:10:28,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:10:28,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2022-12-05 21:10:28,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842594859] [2022-12-05 21:10:28,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:10:28,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-05 21:10:28,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:10:28,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-05 21:10:28,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2022-12-05 21:10:28,480 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:10:28,480 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 585 places, 1443 transitions, 46451 flow. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:10:28,480 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:10:28,480 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:10:28,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:10:34,423 INFO L130 PetriNetUnfolder]: 4631/9378 cut-off events. [2022-12-05 21:10:34,423 INFO L131 PetriNetUnfolder]: For 594392/594392 co-relation queries the response was YES. [2022-12-05 21:10:34,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125035 conditions, 9378 events. 4631/9378 cut-off events. For 594392/594392 co-relation queries the response was YES. Maximal size of possible extension queue 801. Compared 83437 event pairs, 228 based on Foata normal form. 36/9414 useless extension candidates. Maximal degree in co-relation 124842. Up to 2872 conditions per place. [2022-12-05 21:10:34,560 INFO L137 encePairwiseOnDemand]: 10/15 looper letters, 931 selfloop transitions, 916 changer transitions 0/1847 dead transitions. [2022-12-05 21:10:34,560 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 605 places, 1847 transitions, 63192 flow [2022-12-05 21:10:34,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-05 21:10:34,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-05 21:10:34,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 155 transitions. [2022-12-05 21:10:34,561 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2022-12-05 21:10:34,561 INFO L175 Difference]: Start difference. First operand has 585 places, 1443 transitions, 46451 flow. Second operand 24 states and 155 transitions. [2022-12-05 21:10:34,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 605 places, 1847 transitions, 63192 flow [2022-12-05 21:10:43,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 589 places, 1847 transitions, 61401 flow, removed 796 selfloop flow, removed 16 redundant places. [2022-12-05 21:10:43,752 INFO L231 Difference]: Finished difference. Result has 596 places, 1670 transitions, 56816 flow [2022-12-05 21:10:43,753 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=44586, PETRI_DIFFERENCE_MINUEND_PLACES=566, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=699, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=690, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=56816, PETRI_PLACES=596, PETRI_TRANSITIONS=1670} [2022-12-05 21:10:43,754 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 576 predicate places. [2022-12-05 21:10:43,754 INFO L495 AbstractCegarLoop]: Abstraction has has 596 places, 1670 transitions, 56816 flow [2022-12-05 21:10:43,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:10:43,754 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:10:43,754 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:10:43,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-12-05 21:10:43,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-12-05 21:10:43,958 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:10:43,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:10:43,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1688277984, now seen corresponding path program 57 times [2022-12-05 21:10:43,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:10:43,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11774163] [2022-12-05 21:10:43,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:10:43,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:10:43,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:10:44,022 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:10:44,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:10:44,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11774163] [2022-12-05 21:10:44,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11774163] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:10:44,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243233895] [2022-12-05 21:10:44,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 21:10:44,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:10:44,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:10:44,024 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:10:44,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-12-05 21:10:44,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-05 21:10:44,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:10:44,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-05 21:10:44,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:10:44,188 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:10:44,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:10:44,226 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:10:44,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243233895] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:10:44,226 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:10:44,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-12-05 21:10:44,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100565329] [2022-12-05 21:10:44,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:10:44,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-05 21:10:44,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:10:44,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-05 21:10:44,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2022-12-05 21:10:44,227 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:10:44,227 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 596 places, 1670 transitions, 56816 flow. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:10:44,227 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:10:44,227 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:10:44,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:10:51,826 INFO L130 PetriNetUnfolder]: 4851/9834 cut-off events. [2022-12-05 21:10:51,826 INFO L131 PetriNetUnfolder]: For 617802/617802 co-relation queries the response was YES. [2022-12-05 21:10:51,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132635 conditions, 9834 events. 4851/9834 cut-off events. For 617802/617802 co-relation queries the response was YES. Maximal size of possible extension queue 827. Compared 88052 event pairs, 238 based on Foata normal form. 12/9846 useless extension candidates. Maximal degree in co-relation 132436. Up to 2658 conditions per place. [2022-12-05 21:10:51,965 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 867 selfloop transitions, 959 changer transitions 10/1836 dead transitions. [2022-12-05 21:10:51,965 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 626 places, 1836 transitions, 64687 flow [2022-12-05 21:10:51,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-05 21:10:51,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-12-05 21:10:51,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 142 transitions. [2022-12-05 21:10:51,966 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3053763440860215 [2022-12-05 21:10:51,966 INFO L175 Difference]: Start difference. First operand has 596 places, 1670 transitions, 56816 flow. Second operand 31 states and 142 transitions. [2022-12-05 21:10:51,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 626 places, 1836 transitions, 64687 flow [2022-12-05 21:11:02,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 616 places, 1836 transitions, 63504 flow, removed 503 selfloop flow, removed 10 redundant places. [2022-12-05 21:11:02,684 INFO L231 Difference]: Finished difference. Result has 624 places, 1747 transitions, 61779 flow [2022-12-05 21:11:02,685 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=55661, PETRI_DIFFERENCE_MINUEND_PLACES=586, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=873, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=723, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=61779, PETRI_PLACES=624, PETRI_TRANSITIONS=1747} [2022-12-05 21:11:02,686 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 604 predicate places. [2022-12-05 21:11:02,686 INFO L495 AbstractCegarLoop]: Abstraction has has 624 places, 1747 transitions, 61779 flow [2022-12-05 21:11:02,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:11:02,686 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:11:02,686 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:11:02,690 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-12-05 21:11:02,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-12-05 21:11:02,890 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:11:02,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:11:02,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1467890676, now seen corresponding path program 58 times [2022-12-05 21:11:02,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:11:02,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192050800] [2022-12-05 21:11:02,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:11:02,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:11:02,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:11:02,948 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:11:02,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:11:02,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192050800] [2022-12-05 21:11:02,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192050800] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:11:02,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893819293] [2022-12-05 21:11:02,948 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 21:11:02,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:11:02,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:11:02,950 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:11:02,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-12-05 21:11:03,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 21:11:03,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:11:03,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-05 21:11:03,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:11:03,102 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:11:03,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:11:03,134 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:11:03,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893819293] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:11:03,134 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:11:03,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-12-05 21:11:03,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247409669] [2022-12-05 21:11:03,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:11:03,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-05 21:11:03,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:11:03,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-05 21:11:03,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-12-05 21:11:03,135 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:11:03,135 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 624 places, 1747 transitions, 61779 flow. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:11:03,135 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:11:03,135 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:11:03,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:11:11,933 INFO L130 PetriNetUnfolder]: 5352/10889 cut-off events. [2022-12-05 21:11:11,933 INFO L131 PetriNetUnfolder]: For 729109/729109 co-relation queries the response was YES. [2022-12-05 21:11:12,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150047 conditions, 10889 events. 5352/10889 cut-off events. For 729109/729109 co-relation queries the response was YES. Maximal size of possible extension queue 929. Compared 99550 event pairs, 683 based on Foata normal form. 28/10917 useless extension candidates. Maximal degree in co-relation 149840. Up to 2591 conditions per place. [2022-12-05 21:11:12,119 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 1097 selfloop transitions, 932 changer transitions 6/2035 dead transitions. [2022-12-05 21:11:12,119 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 651 places, 2035 transitions, 73617 flow [2022-12-05 21:11:12,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-05 21:11:12,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-12-05 21:11:12,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 154 transitions. [2022-12-05 21:11:12,129 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3311827956989247 [2022-12-05 21:11:12,130 INFO L175 Difference]: Start difference. First operand has 624 places, 1747 transitions, 61779 flow. Second operand 31 states and 154 transitions. [2022-12-05 21:11:12,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 651 places, 2035 transitions, 73617 flow [2022-12-05 21:11:26,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 634 places, 2035 transitions, 72508 flow, removed 213 selfloop flow, removed 17 redundant places. [2022-12-05 21:11:26,291 INFO L231 Difference]: Finished difference. Result has 642 places, 1903 transitions, 69041 flow [2022-12-05 21:11:26,292 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=60517, PETRI_DIFFERENCE_MINUEND_PLACES=604, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1740, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=784, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=883, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=69041, PETRI_PLACES=642, PETRI_TRANSITIONS=1903} [2022-12-05 21:11:26,292 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 622 predicate places. [2022-12-05 21:11:26,292 INFO L495 AbstractCegarLoop]: Abstraction has has 642 places, 1903 transitions, 69041 flow [2022-12-05 21:11:26,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:11:26,292 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:11:26,293 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:11:26,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-12-05 21:11:26,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:11:26,497 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:11:26,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:11:26,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1258793128, now seen corresponding path program 59 times [2022-12-05 21:11:26,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:11:26,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765159560] [2022-12-05 21:11:26,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:11:26,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:11:26,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:11:26,560 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:11:26,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:11:26,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765159560] [2022-12-05 21:11:26,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765159560] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:11:26,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208367806] [2022-12-05 21:11:26,560 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 21:11:26,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:11:26,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:11:26,562 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:11:26,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-12-05 21:11:26,696 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-05 21:11:26,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:11:26,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-05 21:11:26,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:11:26,729 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:11:26,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:11:26,761 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:11:26,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208367806] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:11:26,761 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:11:26,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-12-05 21:11:26,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178826027] [2022-12-05 21:11:26,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:11:26,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-05 21:11:26,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:11:26,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-05 21:11:26,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-12-05 21:11:26,762 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:11:26,762 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 642 places, 1903 transitions, 69041 flow. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:11:26,762 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:11:26,762 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:11:26,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:11:35,796 INFO L130 PetriNetUnfolder]: 5345/10872 cut-off events. [2022-12-05 21:11:35,797 INFO L131 PetriNetUnfolder]: For 783691/783691 co-relation queries the response was YES. [2022-12-05 21:11:35,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153333 conditions, 10872 events. 5345/10872 cut-off events. For 783691/783691 co-relation queries the response was YES. Maximal size of possible extension queue 932. Compared 99555 event pairs, 1014 based on Foata normal form. 2/10874 useless extension candidates. Maximal degree in co-relation 153118. Up to 5443 conditions per place. [2022-12-05 21:11:35,974 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 1329 selfloop transitions, 612 changer transitions 7/1948 dead transitions. [2022-12-05 21:11:35,974 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 654 places, 1948 transitions, 73854 flow [2022-12-05 21:11:35,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-05 21:11:35,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-05 21:11:35,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 65 transitions. [2022-12-05 21:11:35,977 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.30952380952380953 [2022-12-05 21:11:35,977 INFO L175 Difference]: Start difference. First operand has 642 places, 1903 transitions, 69041 flow. Second operand 14 states and 65 transitions. [2022-12-05 21:11:35,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 654 places, 1948 transitions, 73854 flow [2022-12-05 21:11:52,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 633 places, 1948 transitions, 71896 flow, removed 714 selfloop flow, removed 21 redundant places. [2022-12-05 21:11:52,186 INFO L231 Difference]: Finished difference. Result has 636 places, 1906 transitions, 68476 flow [2022-12-05 21:11:52,188 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=67104, PETRI_DIFFERENCE_MINUEND_PLACES=620, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1903, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=607, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=68476, PETRI_PLACES=636, PETRI_TRANSITIONS=1906} [2022-12-05 21:11:52,188 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 616 predicate places. [2022-12-05 21:11:52,188 INFO L495 AbstractCegarLoop]: Abstraction has has 636 places, 1906 transitions, 68476 flow [2022-12-05 21:11:52,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:11:52,188 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:11:52,188 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:11:52,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-12-05 21:11:52,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-12-05 21:11:52,391 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:11:52,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:11:52,391 INFO L85 PathProgramCache]: Analyzing trace with hash -514558753, now seen corresponding path program 60 times [2022-12-05 21:11:52,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:11:52,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015395158] [2022-12-05 21:11:52,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:11:52,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:11:52,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:11:52,450 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:11:52,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:11:52,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015395158] [2022-12-05 21:11:52,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015395158] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:11:52,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636145332] [2022-12-05 21:11:52,451 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 21:11:52,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:11:52,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:11:52,454 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:11:52,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-12-05 21:11:52,543 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-05 21:11:52,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:11:52,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-05 21:11:52,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:11:52,597 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:11:52,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:11:52,651 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:11:52,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636145332] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:11:52,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:11:52,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 16 [2022-12-05 21:11:52,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850195163] [2022-12-05 21:11:52,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:11:52,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-05 21:11:52,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:11:52,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-05 21:11:52,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-12-05 21:11:52,653 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:11:52,653 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 636 places, 1906 transitions, 68476 flow. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:11:52,653 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:11:52,653 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:11:52,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:12:01,921 INFO L130 PetriNetUnfolder]: 5431/11018 cut-off events. [2022-12-05 21:12:01,921 INFO L131 PetriNetUnfolder]: For 757932/757932 co-relation queries the response was YES. [2022-12-05 21:12:02,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153989 conditions, 11018 events. 5431/11018 cut-off events. For 757932/757932 co-relation queries the response was YES. Maximal size of possible extension queue 945. Compared 100453 event pairs, 501 based on Foata normal form. 34/11052 useless extension candidates. Maximal degree in co-relation 153772. Up to 10511 conditions per place. [2022-12-05 21:12:02,103 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 1845 selfloop transitions, 141 changer transitions 0/1986 dead transitions. [2022-12-05 21:12:02,103 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 647 places, 1986 transitions, 74520 flow [2022-12-05 21:12:02,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-05 21:12:02,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-05 21:12:02,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 75 transitions. [2022-12-05 21:12:02,104 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2022-12-05 21:12:02,104 INFO L175 Difference]: Start difference. First operand has 636 places, 1906 transitions, 68476 flow. Second operand 15 states and 75 transitions. [2022-12-05 21:12:02,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 647 places, 1986 transitions, 74520 flow [2022-12-05 21:12:17,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 637 places, 1986 transitions, 73670 flow, removed 70 selfloop flow, removed 10 redundant places. [2022-12-05 21:12:17,383 INFO L231 Difference]: Finished difference. Result has 642 places, 1947 transitions, 69319 flow [2022-12-05 21:12:17,384 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=67644, PETRI_DIFFERENCE_MINUEND_PLACES=623, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1906, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1768, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=69319, PETRI_PLACES=642, PETRI_TRANSITIONS=1947} [2022-12-05 21:12:17,386 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 622 predicate places. [2022-12-05 21:12:17,386 INFO L495 AbstractCegarLoop]: Abstraction has has 642 places, 1947 transitions, 69319 flow [2022-12-05 21:12:17,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:12:17,386 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:12:17,386 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:12:17,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-12-05 21:12:17,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:12:17,590 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:12:17,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:12:17,591 INFO L85 PathProgramCache]: Analyzing trace with hash -979762890, now seen corresponding path program 61 times [2022-12-05 21:12:17,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:12:17,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047345905] [2022-12-05 21:12:17,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:12:17,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:12:17,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:12:17,675 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:12:17,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:12:17,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047345905] [2022-12-05 21:12:17,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047345905] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:12:17,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161170528] [2022-12-05 21:12:17,676 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-05 21:12:17,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:12:17,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:12:17,677 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:12:17,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-12-05 21:12:17,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:12:17,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-05 21:12:17,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:12:17,824 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:12:17,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:12:17,856 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:12:17,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161170528] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:12:17,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:12:17,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 16 [2022-12-05 21:12:17,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348208362] [2022-12-05 21:12:17,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:12:17,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-05 21:12:17,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:12:17,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-05 21:12:17,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-12-05 21:12:17,858 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:12:17,858 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 642 places, 1947 transitions, 69319 flow. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:12:17,858 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:12:17,858 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:12:17,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:12:27,903 INFO L130 PetriNetUnfolder]: 5565/11314 cut-off events. [2022-12-05 21:12:27,904 INFO L131 PetriNetUnfolder]: For 758211/758211 co-relation queries the response was YES. [2022-12-05 21:12:28,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156620 conditions, 11314 events. 5565/11314 cut-off events. For 758211/758211 co-relation queries the response was YES. Maximal size of possible extension queue 975. Compared 104104 event pairs, 868 based on Foata normal form. 16/11330 useless extension candidates. Maximal degree in co-relation 156402. Up to 3470 conditions per place. [2022-12-05 21:12:28,081 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 1320 selfloop transitions, 762 changer transitions 14/2096 dead transitions. [2022-12-05 21:12:28,081 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 665 places, 2096 transitions, 77253 flow [2022-12-05 21:12:28,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-05 21:12:28,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-05 21:12:28,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 116 transitions. [2022-12-05 21:12:28,082 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.32222222222222224 [2022-12-05 21:12:28,082 INFO L175 Difference]: Start difference. First operand has 642 places, 1947 transitions, 69319 flow. Second operand 24 states and 116 transitions. [2022-12-05 21:12:28,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 665 places, 2096 transitions, 77253 flow [2022-12-05 21:12:44,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 660 places, 2096 transitions, 77015 flow, removed 83 selfloop flow, removed 5 redundant places. [2022-12-05 21:12:44,541 INFO L231 Difference]: Finished difference. Result has 667 places, 1989 transitions, 73315 flow [2022-12-05 21:12:44,542 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=68868, PETRI_DIFFERENCE_MINUEND_PLACES=637, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1940, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=701, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=73315, PETRI_PLACES=667, PETRI_TRANSITIONS=1989} [2022-12-05 21:12:44,542 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 647 predicate places. [2022-12-05 21:12:44,542 INFO L495 AbstractCegarLoop]: Abstraction has has 667 places, 1989 transitions, 73315 flow [2022-12-05 21:12:44,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:12:44,542 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:12:44,542 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:12:44,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-12-05 21:12:44,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:12:44,747 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:12:44,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:12:44,747 INFO L85 PathProgramCache]: Analyzing trace with hash 163146722, now seen corresponding path program 62 times [2022-12-05 21:12:44,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:12:44,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460212553] [2022-12-05 21:12:44,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:12:44,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:12:44,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:12:44,807 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:12:44,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:12:44,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460212553] [2022-12-05 21:12:44,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460212553] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:12:44,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113360197] [2022-12-05 21:12:44,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 21:12:44,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:12:44,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:12:44,809 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:12:44,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-12-05 21:12:44,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:12:44,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:12:44,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-05 21:12:44,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:12:44,968 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:12:44,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:12:45,018 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:12:45,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113360197] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:12:45,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:12:45,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-12-05 21:12:45,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267658182] [2022-12-05 21:12:45,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:12:45,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-05 21:12:45,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:12:45,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-05 21:12:45,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-12-05 21:12:45,020 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:12:45,020 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 667 places, 1989 transitions, 73315 flow. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:12:45,020 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:12:45,020 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:12:45,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:12:55,232 INFO L130 PetriNetUnfolder]: 5634/11455 cut-off events. [2022-12-05 21:12:55,233 INFO L131 PetriNetUnfolder]: For 850074/850074 co-relation queries the response was YES. [2022-12-05 21:12:55,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163521 conditions, 11455 events. 5634/11455 cut-off events. For 850074/850074 co-relation queries the response was YES. Maximal size of possible extension queue 1001. Compared 105619 event pairs, 926 based on Foata normal form. 10/11465 useless extension candidates. Maximal degree in co-relation 163296. Up to 3742 conditions per place. [2022-12-05 21:12:55,428 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 1341 selfloop transitions, 774 changer transitions 9/2124 dead transitions. [2022-12-05 21:12:55,429 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 696 places, 2124 transitions, 80848 flow [2022-12-05 21:12:55,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-05 21:12:55,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-12-05 21:12:55,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 137 transitions. [2022-12-05 21:12:55,430 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.2946236559139785 [2022-12-05 21:12:55,430 INFO L175 Difference]: Start difference. First operand has 667 places, 1989 transitions, 73315 flow. Second operand 31 states and 137 transitions. [2022-12-05 21:12:55,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 696 places, 2124 transitions, 80848 flow [2022-12-05 21:13:15,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 686 places, 2124 transitions, 80157 flow, removed 236 selfloop flow, removed 10 redundant places. [2022-12-05 21:13:15,300 INFO L231 Difference]: Finished difference. Result has 693 places, 2036 transitions, 77486 flow [2022-12-05 21:13:15,301 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=72705, PETRI_DIFFERENCE_MINUEND_PLACES=656, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1987, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=721, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=77486, PETRI_PLACES=693, PETRI_TRANSITIONS=2036} [2022-12-05 21:13:15,301 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 673 predicate places. [2022-12-05 21:13:15,301 INFO L495 AbstractCegarLoop]: Abstraction has has 693 places, 2036 transitions, 77486 flow [2022-12-05 21:13:15,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:13:15,302 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:13:15,302 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:13:15,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-12-05 21:13:15,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2022-12-05 21:13:15,504 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:13:15,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:13:15,505 INFO L85 PathProgramCache]: Analyzing trace with hash 27460650, now seen corresponding path program 63 times [2022-12-05 21:13:15,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:13:15,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422540511] [2022-12-05 21:13:15,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:13:15,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:13:15,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:13:15,577 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:13:15,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:13:15,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422540511] [2022-12-05 21:13:15,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422540511] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:13:15,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246491463] [2022-12-05 21:13:15,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 21:13:15,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:13:15,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:13:15,579 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:13:15,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-12-05 21:13:15,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-05 21:13:15,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:13:15,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-05 21:13:15,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:13:15,777 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:13:15,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:13:15,829 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:13:15,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246491463] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:13:15,830 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:13:15,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-12-05 21:13:15,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331390470] [2022-12-05 21:13:15,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:13:15,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-05 21:13:15,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:13:15,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-05 21:13:15,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2022-12-05 21:13:15,833 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:13:15,833 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 693 places, 2036 transitions, 77486 flow. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:13:15,833 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:13:15,833 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:13:15,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:13:27,727 INFO L130 PetriNetUnfolder]: 5970/12101 cut-off events. [2022-12-05 21:13:27,727 INFO L131 PetriNetUnfolder]: For 1028188/1028188 co-relation queries the response was YES. [2022-12-05 21:13:27,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178928 conditions, 12101 events. 5970/12101 cut-off events. For 1028188/1028188 co-relation queries the response was YES. Maximal size of possible extension queue 1059. Compared 112095 event pairs, 2245 based on Foata normal form. 208/12309 useless extension candidates. Maximal degree in co-relation 178696. Up to 11037 conditions per place. [2022-12-05 21:13:27,935 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 2036 selfloop transitions, 217 changer transitions 2/2255 dead transitions. [2022-12-05 21:13:27,935 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 710 places, 2255 transitions, 89111 flow [2022-12-05 21:13:27,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-05 21:13:27,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-05 21:13:27,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 142 transitions. [2022-12-05 21:13:27,936 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4507936507936508 [2022-12-05 21:13:27,936 INFO L175 Difference]: Start difference. First operand has 693 places, 2036 transitions, 77486 flow. Second operand 21 states and 142 transitions. [2022-12-05 21:13:27,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 710 places, 2255 transitions, 89111 flow [2022-12-05 21:13:50,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 695 places, 2255 transitions, 87696 flow, removed 498 selfloop flow, removed 15 redundant places. [2022-12-05 21:13:50,801 INFO L231 Difference]: Finished difference. Result has 708 places, 2154 transitions, 81806 flow [2022-12-05 21:13:50,802 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=76162, PETRI_DIFFERENCE_MINUEND_PLACES=675, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2029, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1892, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=81806, PETRI_PLACES=708, PETRI_TRANSITIONS=2154} [2022-12-05 21:13:50,803 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 688 predicate places. [2022-12-05 21:13:50,807 INFO L495 AbstractCegarLoop]: Abstraction has has 708 places, 2154 transitions, 81806 flow [2022-12-05 21:13:50,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:13:50,808 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:13:50,808 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:13:50,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-12-05 21:13:51,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:13:51,013 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:13:51,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:13:51,013 INFO L85 PathProgramCache]: Analyzing trace with hash 133599231, now seen corresponding path program 64 times [2022-12-05 21:13:51,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:13:51,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029010118] [2022-12-05 21:13:51,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:13:51,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:13:51,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:13:51,078 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:13:51,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:13:51,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029010118] [2022-12-05 21:13:51,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029010118] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:13:51,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626432550] [2022-12-05 21:13:51,079 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 21:13:51,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:13:51,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:13:51,080 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:13:51,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-12-05 21:13:51,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 21:13:51,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:13:51,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-05 21:13:51,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:13:51,262 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:13:51,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:13:51,300 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:13:51,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626432550] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:13:51,301 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:13:51,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-12-05 21:13:51,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349558122] [2022-12-05 21:13:51,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:13:51,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-05 21:13:51,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:13:51,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-05 21:13:51,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2022-12-05 21:13:51,301 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:13:51,303 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 708 places, 2154 transitions, 81806 flow. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:13:51,303 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:13:51,303 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:13:51,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:14:04,956 INFO L130 PetriNetUnfolder]: 6352/12953 cut-off events. [2022-12-05 21:14:04,956 INFO L131 PetriNetUnfolder]: For 1168875/1168875 co-relation queries the response was YES. [2022-12-05 21:14:05,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195011 conditions, 12953 events. 6352/12953 cut-off events. For 1168875/1168875 co-relation queries the response was YES. Maximal size of possible extension queue 1155. Compared 121631 event pairs, 239 based on Foata normal form. 112/13065 useless extension candidates. Maximal degree in co-relation 194766. Up to 5713 conditions per place. [2022-12-05 21:14:05,202 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 1501 selfloop transitions, 938 changer transitions 23/2462 dead transitions. [2022-12-05 21:14:05,203 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 745 places, 2462 transitions, 97023 flow [2022-12-05 21:14:05,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-12-05 21:14:05,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-12-05 21:14:05,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 189 transitions. [2022-12-05 21:14:05,204 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.33157894736842103 [2022-12-05 21:14:05,204 INFO L175 Difference]: Start difference. First operand has 708 places, 2154 transitions, 81806 flow. Second operand 38 states and 189 transitions. [2022-12-05 21:14:05,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 745 places, 2462 transitions, 97023 flow [2022-12-05 21:14:32,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 741 places, 2462 transitions, 95147 flow, removed 915 selfloop flow, removed 4 redundant places. [2022-12-05 21:14:32,435 INFO L231 Difference]: Finished difference. Result has 752 places, 2297 transitions, 90018 flow [2022-12-05 21:14:32,436 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=79983, PETRI_DIFFERENCE_MINUEND_PLACES=704, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=785, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=90018, PETRI_PLACES=752, PETRI_TRANSITIONS=2297} [2022-12-05 21:14:32,436 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 732 predicate places. [2022-12-05 21:14:32,436 INFO L495 AbstractCegarLoop]: Abstraction has has 752 places, 2297 transitions, 90018 flow [2022-12-05 21:14:32,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:14:32,437 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:14:32,437 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:14:32,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-12-05 21:14:32,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:14:32,641 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:14:32,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:14:32,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1655963597, now seen corresponding path program 65 times [2022-12-05 21:14:32,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:14:32,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917687839] [2022-12-05 21:14:32,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:14:32,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:14:32,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:14:32,701 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:14:32,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:14:32,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917687839] [2022-12-05 21:14:32,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917687839] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:14:32,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828599599] [2022-12-05 21:14:32,702 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 21:14:32,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:14:32,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:14:32,703 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:14:32,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-12-05 21:14:32,812 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-05 21:14:32,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:14:32,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-05 21:14:32,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:14:32,868 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:14:32,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:14:32,898 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:14:32,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828599599] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:14:32,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:14:32,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2022-12-05 21:14:32,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463213274] [2022-12-05 21:14:32,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:14:32,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-05 21:14:32,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:14:32,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-05 21:14:32,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2022-12-05 21:14:32,899 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:14:32,899 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 752 places, 2297 transitions, 90018 flow. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:14:32,899 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:14:32,899 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:14:32,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:14:48,515 INFO L130 PetriNetUnfolder]: 6949/14164 cut-off events. [2022-12-05 21:14:48,516 INFO L131 PetriNetUnfolder]: For 1440501/1440501 co-relation queries the response was YES. [2022-12-05 21:14:48,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220920 conditions, 14164 events. 6949/14164 cut-off events. For 1440501/1440501 co-relation queries the response was YES. Maximal size of possible extension queue 1256. Compared 135369 event pairs, 537 based on Foata normal form. 84/14248 useless extension candidates. Maximal degree in co-relation 220664. Up to 8733 conditions per place. [2022-12-05 21:14:48,795 INFO L137 encePairwiseOnDemand]: 10/15 looper letters, 1859 selfloop transitions, 829 changer transitions 0/2688 dead transitions. [2022-12-05 21:14:48,795 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 773 places, 2688 transitions, 110126 flow [2022-12-05 21:14:48,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-05 21:14:48,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-05 21:14:48,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 145 transitions. [2022-12-05 21:14:48,796 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4027777777777778 [2022-12-05 21:14:48,796 INFO L175 Difference]: Start difference. First operand has 752 places, 2297 transitions, 90018 flow. Second operand 24 states and 145 transitions. [2022-12-05 21:14:48,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 773 places, 2688 transitions, 110126 flow [2022-12-05 21:15:26,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 760 places, 2688 transitions, 104831 flow, removed 2371 selfloop flow, removed 13 redundant places. [2022-12-05 21:15:26,650 INFO L231 Difference]: Finished difference. Result has 769 places, 2487 transitions, 96455 flow [2022-12-05 21:15:26,652 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=85728, PETRI_DIFFERENCE_MINUEND_PLACES=737, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=653, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1575, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=96455, PETRI_PLACES=769, PETRI_TRANSITIONS=2487} [2022-12-05 21:15:26,652 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 749 predicate places. [2022-12-05 21:15:26,652 INFO L495 AbstractCegarLoop]: Abstraction has has 769 places, 2487 transitions, 96455 flow [2022-12-05 21:15:26,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:15:26,652 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:15:26,652 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:15:26,657 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-12-05 21:15:26,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:15:26,854 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:15:26,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:15:26,854 INFO L85 PathProgramCache]: Analyzing trace with hash -111178197, now seen corresponding path program 66 times [2022-12-05 21:15:26,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:15:26,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882888516] [2022-12-05 21:15:26,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:15:26,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:15:26,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:15:26,909 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:15:26,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:15:26,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882888516] [2022-12-05 21:15:26,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882888516] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:15:26,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295000505] [2022-12-05 21:15:26,910 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 21:15:26,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:15:26,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:15:26,911 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:15:26,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-12-05 21:15:27,027 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-05 21:15:27,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:15:27,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-05 21:15:27,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:15:27,088 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:15:27,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:15:27,117 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:15:27,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295000505] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:15:27,118 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:15:27,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 16 [2022-12-05 21:15:27,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402039200] [2022-12-05 21:15:27,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:15:27,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-05 21:15:27,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:15:27,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-05 21:15:27,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-12-05 21:15:27,118 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:15:27,119 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 769 places, 2487 transitions, 96455 flow. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:15:27,119 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:15:27,119 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:15:27,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:15:44,108 INFO L130 PetriNetUnfolder]: 7287/14938 cut-off events. [2022-12-05 21:15:44,108 INFO L131 PetriNetUnfolder]: For 1450118/1450118 co-relation queries the response was YES. [2022-12-05 21:15:44,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226433 conditions, 14938 events. 7287/14938 cut-off events. For 1450118/1450118 co-relation queries the response was YES. Maximal size of possible extension queue 1310. Compared 144154 event pairs, 285 based on Foata normal form. 160/15098 useless extension candidates. Maximal degree in co-relation 226170. Up to 6747 conditions per place. [2022-12-05 21:15:44,402 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 1765 selfloop transitions, 1002 changer transitions 6/2773 dead transitions. [2022-12-05 21:15:44,402 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 799 places, 2773 transitions, 112192 flow [2022-12-05 21:15:44,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-05 21:15:44,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-12-05 21:15:44,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 145 transitions. [2022-12-05 21:15:44,403 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3118279569892473 [2022-12-05 21:15:44,403 INFO L175 Difference]: Start difference. First operand has 769 places, 2487 transitions, 96455 flow. Second operand 31 states and 145 transitions. [2022-12-05 21:15:44,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 799 places, 2773 transitions, 112192 flow [2022-12-05 21:16:23,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 785 places, 2773 transitions, 109257 flow, removed 1052 selfloop flow, removed 14 redundant places. [2022-12-05 21:16:24,036 INFO L231 Difference]: Finished difference. Result has 795 places, 2639 transitions, 103796 flow [2022-12-05 21:16:24,038 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=93082, PETRI_DIFFERENCE_MINUEND_PLACES=755, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=826, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1542, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=103796, PETRI_PLACES=795, PETRI_TRANSITIONS=2639} [2022-12-05 21:16:24,038 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 775 predicate places. [2022-12-05 21:16:24,038 INFO L495 AbstractCegarLoop]: Abstraction has has 795 places, 2639 transitions, 103796 flow [2022-12-05 21:16:24,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:16:24,038 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:16:24,038 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:16:24,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-12-05 21:16:24,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-12-05 21:16:24,243 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:16:24,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:16:24,243 INFO L85 PathProgramCache]: Analyzing trace with hash -288113012, now seen corresponding path program 67 times [2022-12-05 21:16:24,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:16:24,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185204900] [2022-12-05 21:16:24,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:16:24,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:16:24,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:16:24,301 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:16:24,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:16:24,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185204900] [2022-12-05 21:16:24,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185204900] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:16:24,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013848835] [2022-12-05 21:16:24,302 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-05 21:16:24,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:16:24,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:16:24,315 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:16:24,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-12-05 21:16:24,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:16:24,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-05 21:16:24,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:16:24,468 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:16:24,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:16:24,501 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:16:24,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013848835] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:16:24,501 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:16:24,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-12-05 21:16:24,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087080115] [2022-12-05 21:16:24,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:16:24,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-05 21:16:24,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:16:24,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-05 21:16:24,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-12-05 21:16:24,502 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:16:24,502 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 795 places, 2639 transitions, 103796 flow. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:16:24,502 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:16:24,502 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:16:24,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:16:42,378 INFO L130 PetriNetUnfolder]: 7276/14899 cut-off events. [2022-12-05 21:16:42,379 INFO L131 PetriNetUnfolder]: For 1426443/1426443 co-relation queries the response was YES. [2022-12-05 21:16:42,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227763 conditions, 14899 events. 7276/14899 cut-off events. For 1426443/1426443 co-relation queries the response was YES. Maximal size of possible extension queue 1308. Compared 144322 event pairs, 1227 based on Foata normal form. 4/14903 useless extension candidates. Maximal degree in co-relation 227494. Up to 4971 conditions per place. [2022-12-05 21:16:42,690 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 1757 selfloop transitions, 951 changer transitions 4/2712 dead transitions. [2022-12-05 21:16:42,690 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 819 places, 2712 transitions, 110170 flow [2022-12-05 21:16:42,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-05 21:16:42,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-12-05 21:16:42,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 114 transitions. [2022-12-05 21:16:42,691 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.304 [2022-12-05 21:16:42,691 INFO L175 Difference]: Start difference. First operand has 795 places, 2639 transitions, 103796 flow. Second operand 25 states and 114 transitions. [2022-12-05 21:16:42,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 819 places, 2712 transitions, 110170 flow [2022-12-05 21:17:23,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 807 places, 2712 transitions, 108882 flow, removed 519 selfloop flow, removed 12 redundant places. [2022-12-05 21:17:23,636 INFO L231 Difference]: Finished difference. Result has 808 places, 2635 transitions, 104315 flow [2022-12-05 21:17:23,638 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=102499, PETRI_DIFFERENCE_MINUEND_PLACES=783, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=951, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1687, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=104315, PETRI_PLACES=808, PETRI_TRANSITIONS=2635} [2022-12-05 21:17:23,638 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 788 predicate places. [2022-12-05 21:17:23,638 INFO L495 AbstractCegarLoop]: Abstraction has has 808 places, 2635 transitions, 104315 flow [2022-12-05 21:17:23,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:17:23,639 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:17:23,639 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:17:23,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-12-05 21:17:23,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:17:23,844 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:17:23,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:17:23,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1618708619, now seen corresponding path program 68 times [2022-12-05 21:17:23,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:17:23,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693206948] [2022-12-05 21:17:23,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:17:23,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:17:23,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:17:23,907 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:17:23,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:17:23,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693206948] [2022-12-05 21:17:23,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693206948] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:17:23,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879232382] [2022-12-05 21:17:23,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 21:17:23,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:17:23,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:17:23,909 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:17:23,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-12-05 21:17:24,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:17:24,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:17:24,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-05 21:17:24,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:17:24,066 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:17:24,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:17:24,098 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:17:24,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879232382] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:17:24,098 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:17:24,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-12-05 21:17:24,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339917717] [2022-12-05 21:17:24,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:17:24,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-05 21:17:24,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:17:24,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-05 21:17:24,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-12-05 21:17:24,099 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:17:24,099 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 808 places, 2635 transitions, 104315 flow. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:17:24,099 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:17:24,099 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:17:24,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:17:44,122 INFO L130 PetriNetUnfolder]: 7359/14986 cut-off events. [2022-12-05 21:17:44,122 INFO L131 PetriNetUnfolder]: For 1456021/1456021 co-relation queries the response was YES. [2022-12-05 21:17:44,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231425 conditions, 14986 events. 7359/14986 cut-off events. For 1456021/1456021 co-relation queries the response was YES. Maximal size of possible extension queue 1330. Compared 144124 event pairs, 549 based on Foata normal form. 54/15040 useless extension candidates. Maximal degree in co-relation 231158. Up to 13647 conditions per place. [2022-12-05 21:17:44,524 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 2394 selfloop transitions, 360 changer transitions 0/2754 dead transitions. [2022-12-05 21:17:44,524 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 822 places, 2754 transitions, 113217 flow [2022-12-05 21:17:44,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-05 21:17:44,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-05 21:17:44,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 82 transitions. [2022-12-05 21:17:44,525 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3416666666666667 [2022-12-05 21:17:44,525 INFO L175 Difference]: Start difference. First operand has 808 places, 2635 transitions, 104315 flow. Second operand 16 states and 82 transitions. [2022-12-05 21:17:44,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 822 places, 2754 transitions, 113217 flow [2022-12-05 21:18:24,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 806 places, 2754 transitions, 111745 flow, removed 26 selfloop flow, removed 16 redundant places. [2022-12-05 21:18:24,100 INFO L231 Difference]: Finished difference. Result has 812 places, 2685 transitions, 105617 flow [2022-12-05 21:18:24,102 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=102236, PETRI_DIFFERENCE_MINUEND_PLACES=791, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=297, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=105617, PETRI_PLACES=812, PETRI_TRANSITIONS=2685} [2022-12-05 21:18:24,102 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 792 predicate places. [2022-12-05 21:18:24,102 INFO L495 AbstractCegarLoop]: Abstraction has has 812 places, 2685 transitions, 105617 flow [2022-12-05 21:18:24,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:18:24,103 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:18:24,103 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:18:24,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-12-05 21:18:24,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:18:24,307 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:18:24,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:18:24,308 INFO L85 PathProgramCache]: Analyzing trace with hash -177320718, now seen corresponding path program 69 times [2022-12-05 21:18:24,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:18:24,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615426451] [2022-12-05 21:18:24,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:18:24,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:18:24,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:18:24,368 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:18:24,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:18:24,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615426451] [2022-12-05 21:18:24,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615426451] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:18:24,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767432288] [2022-12-05 21:18:24,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 21:18:24,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:18:24,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:18:24,370 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:18:24,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-12-05 21:18:24,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-05 21:18:24,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:18:24,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-05 21:18:24,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:18:24,565 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:18:24,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:18:24,603 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:18:24,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767432288] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:18:24,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:18:24,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2022-12-05 21:18:24,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25976977] [2022-12-05 21:18:24,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:18:24,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-05 21:18:24,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:18:24,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-05 21:18:24,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2022-12-05 21:18:24,605 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:18:24,605 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 812 places, 2685 transitions, 105617 flow. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:18:24,605 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:18:24,605 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:18:24,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:18:45,374 INFO L130 PetriNetUnfolder]: 8180/16831 cut-off events. [2022-12-05 21:18:45,375 INFO L131 PetriNetUnfolder]: For 1635539/1635539 co-relation queries the response was YES. [2022-12-05 21:18:45,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259181 conditions, 16831 events. 8180/16831 cut-off events. For 1635539/1635539 co-relation queries the response was YES. Maximal size of possible extension queue 1461. Compared 167052 event pairs, 2534 based on Foata normal form. 104/16935 useless extension candidates. Maximal degree in co-relation 258908. Up to 12158 conditions per place. [2022-12-05 21:18:45,718 INFO L137 encePairwiseOnDemand]: 10/15 looper letters, 2434 selfloop transitions, 652 changer transitions 0/3086 dead transitions. [2022-12-05 21:18:45,718 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 831 places, 3086 transitions, 126036 flow [2022-12-05 21:18:45,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-05 21:18:45,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-05 21:18:45,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 112 transitions. [2022-12-05 21:18:45,719 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.37333333333333335 [2022-12-05 21:18:45,719 INFO L175 Difference]: Start difference. First operand has 812 places, 2685 transitions, 105617 flow. Second operand 20 states and 112 transitions. [2022-12-05 21:18:45,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 831 places, 3086 transitions, 126036 flow [2022-12-05 21:19:32,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 823 places, 3086 transitions, 125437 flow, removed 99 selfloop flow, removed 8 redundant places. [2022-12-05 21:19:32,933 INFO L231 Difference]: Finished difference. Result has 829 places, 2892 transitions, 115429 flow [2022-12-05 21:19:32,934 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=104853, PETRI_DIFFERENCE_MINUEND_PLACES=804, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2681, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=458, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2054, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=115429, PETRI_PLACES=829, PETRI_TRANSITIONS=2892} [2022-12-05 21:19:32,934 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 809 predicate places. [2022-12-05 21:19:32,935 INFO L495 AbstractCegarLoop]: Abstraction has has 829 places, 2892 transitions, 115429 flow [2022-12-05 21:19:32,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:19:32,935 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:19:32,935 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:19:32,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-12-05 21:19:33,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-12-05 21:19:33,140 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:19:33,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:19:33,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1960683263, now seen corresponding path program 70 times [2022-12-05 21:19:33,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:19:33,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654577985] [2022-12-05 21:19:33,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:19:33,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:19:33,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:19:33,200 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:19:33,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:19:33,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654577985] [2022-12-05 21:19:33,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654577985] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:19:33,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269917255] [2022-12-05 21:19:33,201 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 21:19:33,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:19:33,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:19:33,202 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:19:33,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-12-05 21:19:33,315 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 21:19:33,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:19:33,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-05 21:19:33,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:19:33,370 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:19:33,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:19:33,404 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:19:33,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269917255] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:19:33,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:19:33,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 16 [2022-12-05 21:19:33,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548731837] [2022-12-05 21:19:33,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:19:33,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-05 21:19:33,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:19:33,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-05 21:19:33,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2022-12-05 21:19:33,405 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:19:33,405 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 829 places, 2892 transitions, 115429 flow. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:19:33,405 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:19:33,405 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:19:33,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:19:57,415 INFO L130 PetriNetUnfolder]: 8358/17277 cut-off events. [2022-12-05 21:19:57,416 INFO L131 PetriNetUnfolder]: For 1716133/1716133 co-relation queries the response was YES. [2022-12-05 21:19:57,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269354 conditions, 17277 events. 8358/17277 cut-off events. For 1716133/1716133 co-relation queries the response was YES. Maximal size of possible extension queue 1495. Compared 172240 event pairs, 373 based on Foata normal form. 76/17353 useless extension candidates. Maximal degree in co-relation 269076. Up to 8350 conditions per place. [2022-12-05 21:19:57,748 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 2003 selfloop transitions, 1055 changer transitions 6/3064 dead transitions. [2022-12-05 21:19:57,749 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 859 places, 3064 transitions, 126699 flow [2022-12-05 21:19:57,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-05 21:19:57,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-12-05 21:19:57,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 141 transitions. [2022-12-05 21:19:57,750 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3032258064516129 [2022-12-05 21:19:57,750 INFO L175 Difference]: Start difference. First operand has 829 places, 2892 transitions, 115429 flow. Second operand 31 states and 141 transitions. [2022-12-05 21:19:57,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 859 places, 3064 transitions, 126699 flow [2022-12-05 21:20:47,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 853 places, 3064 transitions, 126250 flow, removed 196 selfloop flow, removed 6 redundant places. [2022-12-05 21:20:48,016 INFO L231 Difference]: Finished difference. Result has 862 places, 2961 transitions, 121379 flow [2022-12-05 21:20:48,018 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=114196, PETRI_DIFFERENCE_MINUEND_PLACES=823, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2875, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=966, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1857, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=121379, PETRI_PLACES=862, PETRI_TRANSITIONS=2961} [2022-12-05 21:20:48,019 INFO L294 CegarLoopForPetriNet]: 20 programPoint places, 842 predicate places. [2022-12-05 21:20:48,019 INFO L495 AbstractCegarLoop]: Abstraction has has 862 places, 2961 transitions, 121379 flow [2022-12-05 21:20:48,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:20:48,019 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:20:48,019 INFO L213 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:20:48,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-12-05 21:20:48,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:20:48,224 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:20:48,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:20:48,224 INFO L85 PathProgramCache]: Analyzing trace with hash -846956437, now seen corresponding path program 71 times [2022-12-05 21:20:48,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:20:48,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263973505] [2022-12-05 21:20:48,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:20:48,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:20:48,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:20:48,283 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:20:48,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:20:48,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263973505] [2022-12-05 21:20:48,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263973505] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:20:48,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438805142] [2022-12-05 21:20:48,283 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 21:20:48,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:20:48,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:20:48,286 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:20:48,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-12-05 21:20:48,396 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-05 21:20:48,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:20:48,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-05 21:20:48,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:20:48,440 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:20:48,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:20:48,470 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:20:48,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438805142] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:20:48,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:20:48,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-12-05 21:20:48,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067070428] [2022-12-05 21:20:48,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:20:48,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-05 21:20:48,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:20:48,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-05 21:20:48,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-12-05 21:20:48,471 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-05 21:20:48,471 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 862 places, 2961 transitions, 121379 flow. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:20:48,471 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:20:48,471 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-05 21:20:48,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:21:13,950 INFO L130 PetriNetUnfolder]: 8357/17254 cut-off events. [2022-12-05 21:21:13,951 INFO L131 PetriNetUnfolder]: For 1831721/1831721 co-relation queries the response was YES. [2022-12-05 21:21:14,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276567 conditions, 17254 events. 8357/17254 cut-off events. For 1831721/1831721 co-relation queries the response was YES. Maximal size of possible extension queue 1507. Compared 172327 event pairs, 639 based on Foata normal form. 124/17378 useless extension candidates. Maximal degree in co-relation 276280. Up to 13438 conditions per place. [2022-12-05 21:21:14,308 INFO L137 encePairwiseOnDemand]: 9/15 looper letters, 2341 selfloop transitions, 768 changer transitions 0/3109 dead transitions. [2022-12-05 21:21:14,309 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 881 places, 3109 transitions, 131578 flow [2022-12-05 21:21:14,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-05 21:21:14,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-05 21:21:14,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 134 transitions. [2022-12-05 21:21:14,309 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.40606060606060607 [2022-12-05 21:21:14,309 INFO L175 Difference]: Start difference. First operand has 862 places, 2961 transitions, 121379 flow. Second operand 22 states and 134 transitions. [2022-12-05 21:21:14,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 881 places, 3109 transitions, 131578 flow Received shutdown request... [2022-12-05 21:21:44,907 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-05 21:21:44,912 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-05 21:21:44,922 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-12-05 21:21:44,927 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-12-05 21:21:45,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:21:45,127 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2022-12-05 21:21:45,129 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2022-12-05 21:21:45,129 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2022-12-05 21:21:45,129 INFO L458 BasicCegarLoop]: Path program histogram: [71, 5, 4, 2] [2022-12-05 21:21:45,131 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-05 21:21:45,131 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-05 21:21:45,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.12 09:21:45 BasicIcfg [2022-12-05 21:21:45,133 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-05 21:21:45,133 INFO L158 Benchmark]: Toolchain (without parser) took 844913.68ms. Allocated memory was 205.5MB in the beginning and 4.2GB in the end (delta: 4.0GB). Free memory was 171.6MB in the beginning and 1.3GB in the end (delta: -1.1GB). Peak memory consumption was 4.5GB. Max. memory is 8.0GB. [2022-12-05 21:21:45,133 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 205.5MB. Free memory was 182.2MB in the beginning and 182.2MB in the end (delta: 93.2kB). There was no memory consumed. Max. memory is 8.0GB. [2022-12-05 21:21:45,133 INFO L158 Benchmark]: CACSL2BoogieTranslator took 231.31ms. Allocated memory is still 205.5MB. Free memory was 171.6MB in the beginning and 160.0MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-12-05 21:21:45,133 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.23ms. Allocated memory is still 205.5MB. Free memory was 160.0MB in the beginning and 157.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-05 21:21:45,133 INFO L158 Benchmark]: Boogie Preprocessor took 37.38ms. Allocated memory is still 205.5MB. Free memory was 157.9MB in the beginning and 156.3MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-12-05 21:21:45,133 INFO L158 Benchmark]: RCFGBuilder took 410.93ms. Allocated memory is still 205.5MB. Free memory was 156.3MB in the beginning and 138.5MB in the end (delta: 17.8MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. [2022-12-05 21:21:45,134 INFO L158 Benchmark]: TraceAbstraction took 844184.72ms. Allocated memory was 205.5MB in the beginning and 4.2GB in the end (delta: 4.0GB). Free memory was 138.0MB in the beginning and 1.3GB in the end (delta: -1.2GB). Peak memory consumption was 4.5GB. Max. memory is 8.0GB. [2022-12-05 21:21:45,135 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 205.5MB. Free memory was 182.2MB in the beginning and 182.2MB in the end (delta: 93.2kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 231.31ms. Allocated memory is still 205.5MB. Free memory was 171.6MB in the beginning and 160.0MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 44.23ms. Allocated memory is still 205.5MB. Free memory was 160.0MB in the beginning and 157.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 37.38ms. Allocated memory is still 205.5MB. Free memory was 157.9MB in the beginning and 156.3MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 410.93ms. Allocated memory is still 205.5MB. Free memory was 156.3MB in the beginning and 138.5MB in the end (delta: 17.8MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. * TraceAbstraction took 844184.72ms. Allocated memory was 205.5MB in the beginning and 4.2GB in the end (delta: 4.0GB). Free memory was 138.0MB in the beginning and 1.3GB in the end (delta: -1.2GB). Peak memory consumption was 4.5GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 6.0s, 172 PlacesBefore, 20 PlacesAfterwards, 179 TransitionsBefore, 15 TransitionsAfterwards, 7452 CoEnabledTransitionPairs, 3 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 53 TrivialYvCompositions, 99 ConcurrentYvCompositions, 12 ChoiceCompositions, 164 TotalNumberOfCompositions, Independence Relation Statistics: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 4839, independent: 4839, independent conditional: 4839, independent unconditional: 0, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 4839, independent: 4839, independent conditional: 0, independent unconditional: 4839, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 4839, independent: 4839, independent conditional: 0, independent unconditional: 4839, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 4839, independent: 4839, independent conditional: 0, independent unconditional: 4839, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 4314, independent: 4314, independent conditional: 0, independent unconditional: 4314, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 4314, independent: 4314, independent conditional: 0, independent unconditional: 4314, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 4839, independent: 525, independent conditional: 0, independent unconditional: 525, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 4314, unknown conditional: 0, unknown unconditional: 4314] , Statistics on independence cache: Total cache size (in pairs): 8931, Positive cache size: 8931, Positive conditional cache size: 0, Positive unconditional cache size: 8931, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0, Eliminated conditions: 0, Maximal queried relation: -1 - TimeoutResultAtElement [Line: 84]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 79]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 78]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 276 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: 844.1s, OverallIterations: 82, TraceHistogramMax: 3, PathProgramHistogramMax: 71, EmptinessCheckTime: 0.0s, AutomataDifference: 796.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 6.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 6493 SdHoareTripleChecker+Valid, 12.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6493 mSDsluCounter, 712 SdHoareTripleChecker+Invalid, 9.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 468 mSDsCounter, 1220 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 26322 IncrementalHoareTripleChecker+Invalid, 27542 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1220 mSolverCounterUnsat, 244 mSDtfsCounter, 26322 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4258 GetRequests, 2244 SyntacticMatches, 310 SemanticMatches, 1704 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12202 ImplicationChecksByTransitivity, 11.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=121379occurred in iteration=81, InterpolantAutomatonStates: 1267, 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: 0.8s SsaConstructionTime, 2.4s SatisfiabilityAnalysisTime, 17.5s InterpolantComputationTime, 2640 NumberOfCodeBlocks, 2640 NumberOfCodeBlocksAsserted, 250 NumberOfCheckSat, 3690 ConstructedInterpolants, 0 QuantifiedInterpolants, 21910 SizeOfPredicates, 703 NumberOfNonLiveVariables, 19292 ConjunctsInSsa, 1820 ConjunctsInUnsatCore, 236 InterpolantComputations, 5 PerfectInterpolantSequences, 452/1356 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