/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/mult-flipped-dist.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-8d0d62b [2022-12-05 21:15:39,367 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-05 21:15:39,368 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-05 21:15:39,415 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-05 21:15:39,416 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-05 21:15:39,416 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-05 21:15:39,430 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-05 21:15:39,431 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-05 21:15:39,432 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-05 21:15:39,433 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-05 21:15:39,433 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-05 21:15:39,434 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-05 21:15:39,434 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-05 21:15:39,435 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-05 21:15:39,436 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-05 21:15:39,436 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-05 21:15:39,437 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-05 21:15:39,437 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-05 21:15:39,439 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-05 21:15:39,440 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-05 21:15:39,441 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-05 21:15:39,448 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-05 21:15:39,450 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-05 21:15:39,453 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-05 21:15:39,458 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-05 21:15:39,458 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-05 21:15:39,458 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-05 21:15:39,459 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-05 21:15:39,459 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-05 21:15:39,460 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-05 21:15:39,460 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-05 21:15:39,461 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-05 21:15:39,461 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-05 21:15:39,461 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-05 21:15:39,462 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-05 21:15:39,462 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-05 21:15:39,463 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-05 21:15:39,463 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-05 21:15:39,463 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-05 21:15:39,464 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-05 21:15:39,464 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-05 21:15:39,465 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 21:15:39,480 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-05 21:15:39,480 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-05 21:15:39,481 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-05 21:15:39,481 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-05 21:15:39,481 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-05 21:15:39,482 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-05 21:15:39,482 INFO L138 SettingsManager]: * Use SBE=true [2022-12-05 21:15:39,482 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-05 21:15:39,482 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-05 21:15:39,482 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-05 21:15:39,482 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-05 21:15:39,482 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-05 21:15:39,483 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-05 21:15:39,483 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-05 21:15:39,483 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-05 21:15:39,483 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-05 21:15:39,483 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-05 21:15:39,483 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-05 21:15:39,483 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-05 21:15:39,483 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-05 21:15:39,483 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-05 21:15:39,483 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-05 21:15:39,484 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-05 21:15:39,484 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-05 21:15:39,484 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-05 21:15:39,484 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-05 21:15:39,484 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-05 21:15:39,484 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-05 21:15:39,484 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-05 21:15:39,484 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-05 21:15:39,484 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-12-05 21:15:39,732 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-05 21:15:39,753 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-05 21:15:39,755 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-05 21:15:39,755 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-05 21:15:39,756 INFO L275 PluginConnector]: CDTParser initialized [2022-12-05 21:15:39,757 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/mult-flipped-dist.wvr.c [2022-12-05 21:15:40,754 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-05 21:15:40,906 INFO L351 CDTParser]: Found 1 translation units. [2022-12-05 21:15:40,907 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-flipped-dist.wvr.c [2022-12-05 21:15:40,912 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb459b5a6/b1747b0cb6b64382b1e0d310fcf5f31f/FLAG1315acc09 [2022-12-05 21:15:40,921 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb459b5a6/b1747b0cb6b64382b1e0d310fcf5f31f [2022-12-05 21:15:40,923 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-05 21:15:40,924 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-05 21:15:40,925 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-05 21:15:40,925 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-05 21:15:40,927 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-05 21:15:40,927 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:15:40" (1/1) ... [2022-12-05 21:15:40,928 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@439134ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:15:40, skipping insertion in model container [2022-12-05 21:15:40,928 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:15:40" (1/1) ... [2022-12-05 21:15:40,932 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-05 21:15:40,944 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-05 21:15:41,041 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/mult-flipped-dist.wvr.c[2135,2148] [2022-12-05 21:15:41,044 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-05 21:15:41,050 INFO L203 MainTranslator]: Completed pre-run [2022-12-05 21:15:41,063 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/mult-flipped-dist.wvr.c[2135,2148] [2022-12-05 21:15:41,063 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-05 21:15:41,085 INFO L208 MainTranslator]: Completed translation [2022-12-05 21:15:41,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:15:41 WrapperNode [2022-12-05 21:15:41,085 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-05 21:15:41,086 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-05 21:15:41,086 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-05 21:15:41,086 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-05 21:15:41,091 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:15:41" (1/1) ... [2022-12-05 21:15:41,096 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:15:41" (1/1) ... [2022-12-05 21:15:41,129 INFO L138 Inliner]: procedures = 22, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2022-12-05 21:15:41,129 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-05 21:15:41,131 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-05 21:15:41,131 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-05 21:15:41,131 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-05 21:15:41,139 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:15:41" (1/1) ... [2022-12-05 21:15:41,140 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:15:41" (1/1) ... [2022-12-05 21:15:41,151 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:15:41" (1/1) ... [2022-12-05 21:15:41,151 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:15:41" (1/1) ... [2022-12-05 21:15:41,163 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:15:41" (1/1) ... [2022-12-05 21:15:41,165 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:15:41" (1/1) ... [2022-12-05 21:15:41,166 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:15:41" (1/1) ... [2022-12-05 21:15:41,167 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:15:41" (1/1) ... [2022-12-05 21:15:41,168 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-05 21:15:41,169 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-05 21:15:41,169 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-05 21:15:41,169 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-05 21:15:41,170 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:15:41" (1/1) ... [2022-12-05 21:15:41,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-05 21:15:41,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:15:41,225 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 21:15:41,233 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 21:15:41,266 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-05 21:15:41,266 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-05 21:15:41,266 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-05 21:15:41,266 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-05 21:15:41,266 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-05 21:15:41,266 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-05 21:15:41,266 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-05 21:15:41,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-05 21:15:41,266 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-05 21:15:41,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-05 21:15:41,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-05 21:15:41,267 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-05 21:15:41,267 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-05 21:15:41,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-05 21:15:41,268 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 21:15:41,336 INFO L236 CfgBuilder]: Building ICFG [2022-12-05 21:15:41,338 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-05 21:15:41,552 INFO L277 CfgBuilder]: Performing block encoding [2022-12-05 21:15:41,557 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-05 21:15:41,557 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-05 21:15:41,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:15:41 BoogieIcfgContainer [2022-12-05 21:15:41,558 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-05 21:15:41,559 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-05 21:15:41,559 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-05 21:15:41,561 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-05 21:15:41,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.12 09:15:40" (1/3) ... [2022-12-05 21:15:41,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2aa9b444 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:15:41, skipping insertion in model container [2022-12-05 21:15:41,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:15:41" (2/3) ... [2022-12-05 21:15:41,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2aa9b444 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:15:41, skipping insertion in model container [2022-12-05 21:15:41,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:15:41" (3/3) ... [2022-12-05 21:15:41,563 INFO L112 eAbstractionObserver]: Analyzing ICFG mult-flipped-dist.wvr.c [2022-12-05 21:15:41,573 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-05 21:15:41,574 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-05 21:15:41,574 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-05 21:15:41,656 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-05 21:15:41,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 102 transitions, 228 flow [2022-12-05 21:15:41,734 INFO L130 PetriNetUnfolder]: 7/99 cut-off events. [2022-12-05 21:15:41,735 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-05 21:15:41,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112 conditions, 99 events. 7/99 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 71 event pairs, 0 based on Foata normal form. 0/91 useless extension candidates. Maximal degree in co-relation 63. Up to 2 conditions per place. [2022-12-05 21:15:41,741 INFO L82 GeneralOperation]: Start removeDead. Operand has 105 places, 102 transitions, 228 flow [2022-12-05 21:15:41,744 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 92 places, 89 transitions, 196 flow [2022-12-05 21:15:41,745 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-05 21:15:41,758 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 92 places, 89 transitions, 196 flow [2022-12-05 21:15:41,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 92 places, 89 transitions, 196 flow [2022-12-05 21:15:41,781 INFO L130 PetriNetUnfolder]: 7/89 cut-off events. [2022-12-05 21:15:41,781 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-05 21:15:41,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 89 events. 7/89 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 68 event pairs, 0 based on Foata normal form. 0/82 useless extension candidates. Maximal degree in co-relation 63. Up to 2 conditions per place. [2022-12-05 21:15:41,784 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 92 places, 89 transitions, 196 flow [2022-12-05 21:15:41,784 INFO L188 LiptonReduction]: Number of co-enabled transitions 1320 [2022-12-05 21:15:43,943 INFO L203 LiptonReduction]: Total number of compositions: 67 [2022-12-05 21:15:43,978 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-05 21:15:43,996 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;@5911014c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-05 21:15:43,996 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-05 21:15:44,011 INFO L130 PetriNetUnfolder]: 3/21 cut-off events. [2022-12-05 21:15:44,011 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-05 21:15:44,011 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:15:44,012 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:15:44,012 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 21:15:44,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:15:44,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1611577722, now seen corresponding path program 1 times [2022-12-05 21:15:44,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:15:44,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501819124] [2022-12-05 21:15:44,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:15:44,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:15:44,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:15:44,580 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 21:15:44,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:15:44,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501819124] [2022-12-05 21:15:44,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501819124] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:15:44,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:15:44,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-05 21:15:44,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421236170] [2022-12-05 21:15:44,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:15:44,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-05 21:15:44,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:15:44,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-05 21:15:44,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-05 21:15:44,605 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2022-12-05 21:15:44,606 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 22 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 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 21:15:44,606 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:15:44,606 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2022-12-05 21:15:44,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:15:44,709 INFO L130 PetriNetUnfolder]: 359/506 cut-off events. [2022-12-05 21:15:44,710 INFO L131 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2022-12-05 21:15:44,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1064 conditions, 506 events. 359/506 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1608 event pairs, 39 based on Foata normal form. 1/305 useless extension candidates. Maximal degree in co-relation 803. Up to 421 conditions per place. [2022-12-05 21:15:44,717 INFO L137 encePairwiseOnDemand]: 17/22 looper letters, 30 selfloop transitions, 4 changer transitions 1/38 dead transitions. [2022-12-05 21:15:44,717 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 38 transitions, 179 flow [2022-12-05 21:15:44,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-05 21:15:44,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-05 21:15:44,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 45 transitions. [2022-12-05 21:15:44,726 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6818181818181818 [2022-12-05 21:15:44,727 INFO L175 Difference]: Start difference. First operand has 29 places, 22 transitions, 62 flow. Second operand 3 states and 45 transitions. [2022-12-05 21:15:44,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 38 transitions, 179 flow [2022-12-05 21:15:44,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 38 transitions, 157 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-05 21:15:44,733 INFO L231 Difference]: Finished difference. Result has 26 places, 25 transitions, 76 flow [2022-12-05 21:15:44,734 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=26, PETRI_TRANSITIONS=25} [2022-12-05 21:15:44,737 INFO L294 CegarLoopForPetriNet]: 29 programPoint places, -3 predicate places. [2022-12-05 21:15:44,737 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 25 transitions, 76 flow [2022-12-05 21:15:44,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 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 21:15:44,737 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:15:44,737 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:15:44,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-05 21:15:44,738 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 21:15:44,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:15:44,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1373045353, now seen corresponding path program 1 times [2022-12-05 21:15:44,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:15:44,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664239457] [2022-12-05 21:15:44,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:15:44,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:15:44,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:15:44,865 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 21:15:44,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:15:44,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664239457] [2022-12-05 21:15:44,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664239457] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:15:44,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:15:44,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-05 21:15:44,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416070080] [2022-12-05 21:15:44,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:15:44,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-05 21:15:44,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:15:44,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-05 21:15:44,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-05 21:15:44,868 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 22 [2022-12-05 21:15:44,868 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 25 transitions, 76 flow. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 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 21:15:44,868 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:15:44,868 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 22 [2022-12-05 21:15:44,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:15:45,050 INFO L130 PetriNetUnfolder]: 486/764 cut-off events. [2022-12-05 21:15:45,050 INFO L131 PetriNetUnfolder]: For 188/188 co-relation queries the response was YES. [2022-12-05 21:15:45,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1805 conditions, 764 events. 486/764 cut-off events. For 188/188 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3147 event pairs, 137 based on Foata normal form. 68/816 useless extension candidates. Maximal degree in co-relation 420. Up to 391 conditions per place. [2022-12-05 21:15:45,054 INFO L137 encePairwiseOnDemand]: 16/22 looper letters, 54 selfloop transitions, 5 changer transitions 2/62 dead transitions. [2022-12-05 21:15:45,054 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 62 transitions, 298 flow [2022-12-05 21:15:45,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-05 21:15:45,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-05 21:15:45,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 65 transitions. [2022-12-05 21:15:45,055 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2022-12-05 21:15:45,055 INFO L175 Difference]: Start difference. First operand has 26 places, 25 transitions, 76 flow. Second operand 5 states and 65 transitions. [2022-12-05 21:15:45,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 62 transitions, 298 flow [2022-12-05 21:15:45,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 62 transitions, 292 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-05 21:15:45,057 INFO L231 Difference]: Finished difference. Result has 32 places, 28 transitions, 119 flow [2022-12-05 21:15:45,057 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=119, PETRI_PLACES=32, PETRI_TRANSITIONS=28} [2022-12-05 21:15:45,057 INFO L294 CegarLoopForPetriNet]: 29 programPoint places, 3 predicate places. [2022-12-05 21:15:45,057 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 28 transitions, 119 flow [2022-12-05 21:15:45,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 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 21:15:45,058 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:15:45,058 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:15:45,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-05 21:15:45,058 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 21:15:45,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:15:45,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1500890983, now seen corresponding path program 2 times [2022-12-05 21:15:45,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:15:45,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476532144] [2022-12-05 21:15:45,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:15:45,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:15:45,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:15:45,144 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 21:15:45,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:15:45,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476532144] [2022-12-05 21:15:45,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476532144] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:15:45,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:15:45,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-05 21:15:45,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973320752] [2022-12-05 21:15:45,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:15:45,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-05 21:15:45,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:15:45,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-05 21:15:45,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-05 21:15:45,146 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 22 [2022-12-05 21:15:45,146 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 119 flow. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 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 21:15:45,146 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:15:45,146 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 22 [2022-12-05 21:15:45,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:15:45,247 INFO L130 PetriNetUnfolder]: 469/738 cut-off events. [2022-12-05 21:15:45,248 INFO L131 PetriNetUnfolder]: For 937/1059 co-relation queries the response was YES. [2022-12-05 21:15:45,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2295 conditions, 738 events. 469/738 cut-off events. For 937/1059 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3068 event pairs, 105 based on Foata normal form. 126/843 useless extension candidates. Maximal degree in co-relation 842. Up to 458 conditions per place. [2022-12-05 21:15:45,251 INFO L137 encePairwiseOnDemand]: 17/22 looper letters, 41 selfloop transitions, 5 changer transitions 5/54 dead transitions. [2022-12-05 21:15:45,251 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 54 transitions, 311 flow [2022-12-05 21:15:45,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-05 21:15:45,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-05 21:15:45,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 56 transitions. [2022-12-05 21:15:45,253 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2022-12-05 21:15:45,253 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 119 flow. Second operand 4 states and 56 transitions. [2022-12-05 21:15:45,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 54 transitions, 311 flow [2022-12-05 21:15:45,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 54 transitions, 301 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-12-05 21:15:45,255 INFO L231 Difference]: Finished difference. Result has 36 places, 30 transitions, 145 flow [2022-12-05 21:15:45,255 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=145, PETRI_PLACES=36, PETRI_TRANSITIONS=30} [2022-12-05 21:15:45,256 INFO L294 CegarLoopForPetriNet]: 29 programPoint places, 7 predicate places. [2022-12-05 21:15:45,256 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 30 transitions, 145 flow [2022-12-05 21:15:45,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 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 21:15:45,256 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:15:45,256 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:15:45,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-05 21:15:45,256 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 21:15:45,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:15:45,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1549951369, now seen corresponding path program 3 times [2022-12-05 21:15:45,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:15:45,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832797245] [2022-12-05 21:15:45,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:15:45,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:15:45,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:15:45,326 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 21:15:45,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:15:45,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832797245] [2022-12-05 21:15:45,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832797245] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:15:45,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:15:45,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-05 21:15:45,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19804597] [2022-12-05 21:15:45,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:15:45,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-05 21:15:45,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:15:45,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-05 21:15:45,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-05 21:15:45,328 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 22 [2022-12-05 21:15:45,328 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 30 transitions, 145 flow. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 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 21:15:45,328 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:15:45,328 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 22 [2022-12-05 21:15:45,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:15:45,469 INFO L130 PetriNetUnfolder]: 585/980 cut-off events. [2022-12-05 21:15:45,469 INFO L131 PetriNetUnfolder]: For 1673/1798 co-relation queries the response was YES. [2022-12-05 21:15:45,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3150 conditions, 980 events. 585/980 cut-off events. For 1673/1798 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 4638 event pairs, 209 based on Foata normal form. 167/1144 useless extension candidates. Maximal degree in co-relation 1305. Up to 539 conditions per place. [2022-12-05 21:15:45,474 INFO L137 encePairwiseOnDemand]: 16/22 looper letters, 58 selfloop transitions, 7 changer transitions 3/69 dead transitions. [2022-12-05 21:15:45,474 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 69 transitions, 437 flow [2022-12-05 21:15:45,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-05 21:15:45,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-05 21:15:45,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 61 transitions. [2022-12-05 21:15:45,475 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5545454545454546 [2022-12-05 21:15:45,475 INFO L175 Difference]: Start difference. First operand has 36 places, 30 transitions, 145 flow. Second operand 5 states and 61 transitions. [2022-12-05 21:15:45,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 69 transitions, 437 flow [2022-12-05 21:15:45,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 69 transitions, 430 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-05 21:15:45,478 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 207 flow [2022-12-05 21:15:45,479 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=207, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2022-12-05 21:15:45,479 INFO L294 CegarLoopForPetriNet]: 29 programPoint places, 13 predicate places. [2022-12-05 21:15:45,479 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 207 flow [2022-12-05 21:15:45,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 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 21:15:45,479 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:15:45,479 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:15:45,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-05 21:15:45,480 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 21:15:45,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:15:45,480 INFO L85 PathProgramCache]: Analyzing trace with hash -468607715, now seen corresponding path program 1 times [2022-12-05 21:15:45,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:15:45,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756124223] [2022-12-05 21:15:45,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:15:45,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:15:45,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:15:45,545 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 21:15:45,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:15:45,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756124223] [2022-12-05 21:15:45,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756124223] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:15:45,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:15:45,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-05 21:15:45,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680733887] [2022-12-05 21:15:45,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:15:45,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-05 21:15:45,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:15:45,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-05 21:15:45,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-05 21:15:45,546 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 22 [2022-12-05 21:15:45,546 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 33 transitions, 207 flow. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 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 21:15:45,547 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:15:45,547 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 22 [2022-12-05 21:15:45,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:15:45,726 INFO L130 PetriNetUnfolder]: 759/1315 cut-off events. [2022-12-05 21:15:45,726 INFO L131 PetriNetUnfolder]: For 5066/5216 co-relation queries the response was YES. [2022-12-05 21:15:45,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4964 conditions, 1315 events. 759/1315 cut-off events. For 5066/5216 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 7025 event pairs, 287 based on Foata normal form. 246/1561 useless extension candidates. Maximal degree in co-relation 1735. Up to 695 conditions per place. [2022-12-05 21:15:45,733 INFO L137 encePairwiseOnDemand]: 16/22 looper letters, 57 selfloop transitions, 6 changer transitions 15/79 dead transitions. [2022-12-05 21:15:45,733 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 79 transitions, 608 flow [2022-12-05 21:15:45,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-05 21:15:45,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-05 21:15:45,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 64 transitions. [2022-12-05 21:15:45,734 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5818181818181818 [2022-12-05 21:15:45,734 INFO L175 Difference]: Start difference. First operand has 42 places, 33 transitions, 207 flow. Second operand 5 states and 64 transitions. [2022-12-05 21:15:45,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 79 transitions, 608 flow [2022-12-05 21:15:45,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 79 transitions, 578 flow, removed 9 selfloop flow, removed 1 redundant places. [2022-12-05 21:15:45,739 INFO L231 Difference]: Finished difference. Result has 48 places, 35 transitions, 257 flow [2022-12-05 21:15:45,740 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=257, PETRI_PLACES=48, PETRI_TRANSITIONS=35} [2022-12-05 21:15:45,740 INFO L294 CegarLoopForPetriNet]: 29 programPoint places, 19 predicate places. [2022-12-05 21:15:45,740 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 35 transitions, 257 flow [2022-12-05 21:15:45,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 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 21:15:45,740 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:15:45,741 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:15:45,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-05 21:15:45,741 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 21:15:45,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:15:45,741 INFO L85 PathProgramCache]: Analyzing trace with hash -2048744165, now seen corresponding path program 4 times [2022-12-05 21:15:45,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:15:45,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811345300] [2022-12-05 21:15:45,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:15:45,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:15:45,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:15:45,789 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 21:15:45,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:15:45,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811345300] [2022-12-05 21:15:45,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811345300] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:15:45,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:15:45,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-05 21:15:45,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443147257] [2022-12-05 21:15:45,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:15:45,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-05 21:15:45,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:15:45,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-05 21:15:45,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-05 21:15:45,791 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 22 [2022-12-05 21:15:45,791 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 35 transitions, 257 flow. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 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 21:15:45,791 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:15:45,791 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 22 [2022-12-05 21:15:45,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:15:45,976 INFO L130 PetriNetUnfolder]: 921/1520 cut-off events. [2022-12-05 21:15:45,976 INFO L131 PetriNetUnfolder]: For 8910/9313 co-relation queries the response was YES. [2022-12-05 21:15:45,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6630 conditions, 1520 events. 921/1520 cut-off events. For 8910/9313 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 7871 event pairs, 320 based on Foata normal form. 201/1628 useless extension candidates. Maximal degree in co-relation 3445. Up to 867 conditions per place. [2022-12-05 21:15:45,985 INFO L137 encePairwiseOnDemand]: 17/22 looper letters, 52 selfloop transitions, 11 changer transitions 2/70 dead transitions. [2022-12-05 21:15:45,985 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 70 transitions, 644 flow [2022-12-05 21:15:45,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-05 21:15:45,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-05 21:15:45,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 54 transitions. [2022-12-05 21:15:45,986 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6136363636363636 [2022-12-05 21:15:45,986 INFO L175 Difference]: Start difference. First operand has 48 places, 35 transitions, 257 flow. Second operand 4 states and 54 transitions. [2022-12-05 21:15:45,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 70 transitions, 644 flow [2022-12-05 21:15:45,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 70 transitions, 612 flow, removed 12 selfloop flow, removed 2 redundant places. [2022-12-05 21:15:45,992 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 394 flow [2022-12-05 21:15:45,993 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=394, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2022-12-05 21:15:45,993 INFO L294 CegarLoopForPetriNet]: 29 programPoint places, 21 predicate places. [2022-12-05 21:15:45,993 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 394 flow [2022-12-05 21:15:45,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 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 21:15:45,993 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:15:45,993 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:15:45,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-05 21:15:45,994 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 21:15:45,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:15:45,994 INFO L85 PathProgramCache]: Analyzing trace with hash 880475359, now seen corresponding path program 2 times [2022-12-05 21:15:45,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:15:45,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766509559] [2022-12-05 21:15:45,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:15:45,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:15:46,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:15:46,050 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 21:15:46,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:15:46,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766509559] [2022-12-05 21:15:46,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766509559] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:15:46,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:15:46,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-05 21:15:46,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490142420] [2022-12-05 21:15:46,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:15:46,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-05 21:15:46,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:15:46,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-05 21:15:46,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-05 21:15:46,052 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 22 [2022-12-05 21:15:46,052 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 394 flow. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 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 21:15:46,052 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:15:46,052 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 22 [2022-12-05 21:15:46,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:15:46,197 INFO L130 PetriNetUnfolder]: 887/1458 cut-off events. [2022-12-05 21:15:46,197 INFO L131 PetriNetUnfolder]: For 9159/9437 co-relation queries the response was YES. [2022-12-05 21:15:46,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7051 conditions, 1458 events. 887/1458 cut-off events. For 9159/9437 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 7388 event pairs, 310 based on Foata normal form. 216/1616 useless extension candidates. Maximal degree in co-relation 4595. Up to 1099 conditions per place. [2022-12-05 21:15:46,205 INFO L137 encePairwiseOnDemand]: 17/22 looper letters, 50 selfloop transitions, 8 changer transitions 14/75 dead transitions. [2022-12-05 21:15:46,206 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 75 transitions, 768 flow [2022-12-05 21:15:46,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-05 21:15:46,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-05 21:15:46,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 54 transitions. [2022-12-05 21:15:46,207 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6136363636363636 [2022-12-05 21:15:46,207 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 394 flow. Second operand 4 states and 54 transitions. [2022-12-05 21:15:46,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 75 transitions, 768 flow [2022-12-05 21:15:46,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 75 transitions, 740 flow, removed 11 selfloop flow, removed 1 redundant places. [2022-12-05 21:15:46,214 INFO L231 Difference]: Finished difference. Result has 54 places, 44 transitions, 427 flow [2022-12-05 21:15:46,214 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=427, PETRI_PLACES=54, PETRI_TRANSITIONS=44} [2022-12-05 21:15:46,214 INFO L294 CegarLoopForPetriNet]: 29 programPoint places, 25 predicate places. [2022-12-05 21:15:46,214 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 44 transitions, 427 flow [2022-12-05 21:15:46,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 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 21:15:46,215 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:15:46,215 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:15:46,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-05 21:15:46,215 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 21:15:46,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:15:46,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1115874391, now seen corresponding path program 5 times [2022-12-05 21:15:46,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:15:46,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531150566] [2022-12-05 21:15:46,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:15:46,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:15:46,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:15:46,266 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 21:15:46,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:15:46,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531150566] [2022-12-05 21:15:46,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531150566] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:15:46,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:15:46,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-05 21:15:46,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291511908] [2022-12-05 21:15:46,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:15:46,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-05 21:15:46,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:15:46,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-05 21:15:46,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-05 21:15:46,268 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 22 [2022-12-05 21:15:46,268 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 44 transitions, 427 flow. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 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 21:15:46,268 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:15:46,268 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 22 [2022-12-05 21:15:46,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:15:46,434 INFO L130 PetriNetUnfolder]: 948/1485 cut-off events. [2022-12-05 21:15:46,434 INFO L131 PetriNetUnfolder]: For 10117/10580 co-relation queries the response was YES. [2022-12-05 21:15:46,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7234 conditions, 1485 events. 948/1485 cut-off events. For 10117/10580 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 6880 event pairs, 276 based on Foata normal form. 211/1612 useless extension candidates. Maximal degree in co-relation 5078. Up to 1016 conditions per place. [2022-12-05 21:15:46,442 INFO L137 encePairwiseOnDemand]: 17/22 looper letters, 51 selfloop transitions, 8 changer transitions 10/73 dead transitions. [2022-12-05 21:15:46,442 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 73 transitions, 740 flow [2022-12-05 21:15:46,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-05 21:15:46,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-05 21:15:46,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 56 transitions. [2022-12-05 21:15:46,443 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2022-12-05 21:15:46,444 INFO L175 Difference]: Start difference. First operand has 54 places, 44 transitions, 427 flow. Second operand 4 states and 56 transitions. [2022-12-05 21:15:46,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 73 transitions, 740 flow [2022-12-05 21:15:46,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 73 transitions, 693 flow, removed 21 selfloop flow, removed 3 redundant places. [2022-12-05 21:15:46,452 INFO L231 Difference]: Finished difference. Result has 54 places, 45 transitions, 425 flow [2022-12-05 21:15:46,452 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=425, PETRI_PLACES=54, PETRI_TRANSITIONS=45} [2022-12-05 21:15:46,453 INFO L294 CegarLoopForPetriNet]: 29 programPoint places, 25 predicate places. [2022-12-05 21:15:46,454 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 45 transitions, 425 flow [2022-12-05 21:15:46,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 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 21:15:46,454 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:15:46,454 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:15:46,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-05 21:15:46,454 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 21:15:46,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:15:46,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1849592850, now seen corresponding path program 1 times [2022-12-05 21:15:46,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:15:46,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322015069] [2022-12-05 21:15:46,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:15:46,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:15:46,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:15:46,509 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 21:15:46,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:15:46,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322015069] [2022-12-05 21:15:46,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322015069] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:15:46,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:15:46,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-05 21:15:46,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255183822] [2022-12-05 21:15:46,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:15:46,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-05 21:15:46,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:15:46,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-05 21:15:46,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-05 21:15:46,514 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 22 [2022-12-05 21:15:46,514 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 425 flow. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 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 21:15:46,514 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:15:46,514 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 22 [2022-12-05 21:15:46,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:15:46,621 INFO L130 PetriNetUnfolder]: 856/1261 cut-off events. [2022-12-05 21:15:46,621 INFO L131 PetriNetUnfolder]: For 10302/10683 co-relation queries the response was YES. [2022-12-05 21:15:46,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6812 conditions, 1261 events. 856/1261 cut-off events. For 10302/10683 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 5251 event pairs, 239 based on Foata normal form. 213/1425 useless extension candidates. Maximal degree in co-relation 4681. Up to 877 conditions per place. [2022-12-05 21:15:46,632 INFO L137 encePairwiseOnDemand]: 17/22 looper letters, 52 selfloop transitions, 21 changer transitions 5/82 dead transitions. [2022-12-05 21:15:46,633 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 82 transitions, 924 flow [2022-12-05 21:15:46,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-05 21:15:46,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-05 21:15:46,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 50 transitions. [2022-12-05 21:15:46,633 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2022-12-05 21:15:46,633 INFO L175 Difference]: Start difference. First operand has 54 places, 45 transitions, 425 flow. Second operand 4 states and 50 transitions. [2022-12-05 21:15:46,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 82 transitions, 924 flow [2022-12-05 21:15:46,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 82 transitions, 883 flow, removed 1 selfloop flow, removed 3 redundant places. [2022-12-05 21:15:46,641 INFO L231 Difference]: Finished difference. Result has 54 places, 57 transitions, 648 flow [2022-12-05 21:15:46,641 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=402, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=648, PETRI_PLACES=54, PETRI_TRANSITIONS=57} [2022-12-05 21:15:46,642 INFO L294 CegarLoopForPetriNet]: 29 programPoint places, 25 predicate places. [2022-12-05 21:15:46,642 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 57 transitions, 648 flow [2022-12-05 21:15:46,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 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 21:15:46,642 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:15:46,642 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:15:46,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-05 21:15:46,643 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 21:15:46,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:15:46,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1448727557, now seen corresponding path program 1 times [2022-12-05 21:15:46,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:15:46,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905733847] [2022-12-05 21:15:46,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:15:46,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:15:46,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:15:46,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:15:46,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:15:46,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905733847] [2022-12-05 21:15:46,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905733847] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:15:46,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730749872] [2022-12-05 21:15:46,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:15:46,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:15:46,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:15:46,721 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 21:15:46,739 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 21:15:46,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:15:46,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-05 21:15:46,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:15:46,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:15:46,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:15:46,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:15:46,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730749872] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:15:46,881 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:15:46,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-12-05 21:15:46,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927017108] [2022-12-05 21:15:46,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:15:46,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-05 21:15:46,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:15:46,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-05 21:15:46,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-05 21:15:46,882 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 22 [2022-12-05 21:15:46,882 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 57 transitions, 648 flow. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 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 21:15:46,882 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:15:46,882 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 22 [2022-12-05 21:15:46,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:15:47,115 INFO L130 PetriNetUnfolder]: 1185/1720 cut-off events. [2022-12-05 21:15:47,115 INFO L131 PetriNetUnfolder]: For 13809/13977 co-relation queries the response was YES. [2022-12-05 21:15:47,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10181 conditions, 1720 events. 1185/1720 cut-off events. For 13809/13977 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 7161 event pairs, 232 based on Foata normal form. 145/1858 useless extension candidates. Maximal degree in co-relation 6629. Up to 940 conditions per place. [2022-12-05 21:15:47,128 INFO L137 encePairwiseOnDemand]: 16/22 looper letters, 98 selfloop transitions, 44 changer transitions 3/147 dead transitions. [2022-12-05 21:15:47,128 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 147 transitions, 1840 flow [2022-12-05 21:15:47,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-05 21:15:47,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-05 21:15:47,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 85 transitions. [2022-12-05 21:15:47,129 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.48295454545454547 [2022-12-05 21:15:47,130 INFO L175 Difference]: Start difference. First operand has 54 places, 57 transitions, 648 flow. Second operand 8 states and 85 transitions. [2022-12-05 21:15:47,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 147 transitions, 1840 flow [2022-12-05 21:15:47,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 147 transitions, 1770 flow, removed 16 selfloop flow, removed 2 redundant places. [2022-12-05 21:15:47,137 INFO L231 Difference]: Finished difference. Result has 62 places, 88 transitions, 1204 flow [2022-12-05 21:15:47,137 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=608, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1204, PETRI_PLACES=62, PETRI_TRANSITIONS=88} [2022-12-05 21:15:47,137 INFO L294 CegarLoopForPetriNet]: 29 programPoint places, 33 predicate places. [2022-12-05 21:15:47,137 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 88 transitions, 1204 flow [2022-12-05 21:15:47,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 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 21:15:47,138 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:15:47,138 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:15:47,155 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 21:15:47,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-05 21:15:47,343 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 21:15:47,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:15:47,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1819739813, now seen corresponding path program 2 times [2022-12-05 21:15:47,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:15:47,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825090534] [2022-12-05 21:15:47,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:15:47,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:15:47,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:15:47,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:15:47,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:15:47,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825090534] [2022-12-05 21:15:47,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825090534] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:15:47,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017510108] [2022-12-05 21:15:47,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 21:15:47,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:15:47,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:15:47,406 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 21:15:47,415 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 21:15:47,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:15:47,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:15:47,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-05 21:15:47,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:15:47,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:15:47,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:15:47,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:15:47,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017510108] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:15:47,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:15:47,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-12-05 21:15:47,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991436726] [2022-12-05 21:15:47,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:15:47,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-05 21:15:47,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:15:47,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-05 21:15:47,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-12-05 21:15:47,540 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 22 [2022-12-05 21:15:47,540 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 88 transitions, 1204 flow. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 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 21:15:47,540 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:15:47,540 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 22 [2022-12-05 21:15:47,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:15:47,754 INFO L130 PetriNetUnfolder]: 1181/1689 cut-off events. [2022-12-05 21:15:47,754 INFO L131 PetriNetUnfolder]: For 17767/17912 co-relation queries the response was YES. [2022-12-05 21:15:47,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10938 conditions, 1689 events. 1181/1689 cut-off events. For 17767/17912 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 6722 event pairs, 249 based on Foata normal form. 152/1838 useless extension candidates. Maximal degree in co-relation 10468. Up to 1055 conditions per place. [2022-12-05 21:15:47,764 INFO L137 encePairwiseOnDemand]: 16/22 looper letters, 71 selfloop transitions, 57 changer transitions 2/132 dead transitions. [2022-12-05 21:15:47,764 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 132 transitions, 1910 flow [2022-12-05 21:15:47,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-05 21:15:47,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-05 21:15:47,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 63 transitions. [2022-12-05 21:15:47,765 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2022-12-05 21:15:47,765 INFO L175 Difference]: Start difference. First operand has 62 places, 88 transitions, 1204 flow. Second operand 6 states and 63 transitions. [2022-12-05 21:15:47,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 132 transitions, 1910 flow [2022-12-05 21:15:47,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 132 transitions, 1850 flow, removed 30 selfloop flow, removed 0 redundant places. [2022-12-05 21:15:47,775 INFO L231 Difference]: Finished difference. Result has 70 places, 104 transitions, 1590 flow [2022-12-05 21:15:47,776 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1150, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1590, PETRI_PLACES=70, PETRI_TRANSITIONS=104} [2022-12-05 21:15:47,776 INFO L294 CegarLoopForPetriNet]: 29 programPoint places, 41 predicate places. [2022-12-05 21:15:47,776 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 104 transitions, 1590 flow [2022-12-05 21:15:47,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 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 21:15:47,776 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:15:47,776 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:15:47,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-05 21:15:47,981 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,SelfDestructingSolverStorable10 [2022-12-05 21:15:47,982 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 21:15:47,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:15:47,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1056509504, now seen corresponding path program 1 times [2022-12-05 21:15:47,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:15:47,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160101258] [2022-12-05 21:15:47,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:15:47,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:15:47,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:15:48,160 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:15:48,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:15:48,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160101258] [2022-12-05 21:15:48,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160101258] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:15:48,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493247886] [2022-12-05 21:15:48,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:15:48,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:15:48,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:15:48,162 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 21:15:48,191 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 21:15:48,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:15:48,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-05 21:15:48,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:15:48,368 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:15:48,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:15:48,451 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:15:48,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493247886] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:15:48,452 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:15:48,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 8 [2022-12-05 21:15:48,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356123923] [2022-12-05 21:15:48,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:15:48,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-05 21:15:48,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:15:48,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-05 21:15:48,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-12-05 21:15:48,453 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2022-12-05 21:15:48,453 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 104 transitions, 1590 flow. Second operand has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 0 states have call successors, (0), 0 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 21:15:48,453 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:15:48,453 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2022-12-05 21:15:48,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:15:48,812 INFO L130 PetriNetUnfolder]: 1552/2216 cut-off events. [2022-12-05 21:15:48,812 INFO L131 PetriNetUnfolder]: For 27052/27612 co-relation queries the response was YES. [2022-12-05 21:15:48,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15037 conditions, 2216 events. 1552/2216 cut-off events. For 27052/27612 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 9254 event pairs, 64 based on Foata normal form. 141/2249 useless extension candidates. Maximal degree in co-relation 14633. Up to 1651 conditions per place. [2022-12-05 21:15:48,828 INFO L137 encePairwiseOnDemand]: 17/22 looper letters, 129 selfloop transitions, 51 changer transitions 2/193 dead transitions. [2022-12-05 21:15:48,828 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 193 transitions, 2632 flow [2022-12-05 21:15:48,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-05 21:15:48,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-05 21:15:48,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 125 transitions. [2022-12-05 21:15:48,830 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6313131313131313 [2022-12-05 21:15:48,830 INFO L175 Difference]: Start difference. First operand has 70 places, 104 transitions, 1590 flow. Second operand 9 states and 125 transitions. [2022-12-05 21:15:48,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 193 transitions, 2632 flow [2022-12-05 21:15:48,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 193 transitions, 2444 flow, removed 72 selfloop flow, removed 2 redundant places. [2022-12-05 21:15:48,847 INFO L231 Difference]: Finished difference. Result has 79 places, 137 transitions, 2105 flow [2022-12-05 21:15:48,848 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1424, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2105, PETRI_PLACES=79, PETRI_TRANSITIONS=137} [2022-12-05 21:15:48,848 INFO L294 CegarLoopForPetriNet]: 29 programPoint places, 50 predicate places. [2022-12-05 21:15:48,848 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 137 transitions, 2105 flow [2022-12-05 21:15:48,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.7) internal successors, (77), 10 states have internal predecessors, (77), 0 states have call successors, (0), 0 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 21:15:48,848 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:15:48,848 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:15:48,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-05 21:15:49,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:15:49,054 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 21:15:49,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:15:49,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1206995360, now seen corresponding path program 2 times [2022-12-05 21:15:49,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:15:49,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020898910] [2022-12-05 21:15:49,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:15:49,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:15:49,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:15:49,211 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:15:49,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:15:49,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020898910] [2022-12-05 21:15:49,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020898910] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:15:49,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692925141] [2022-12-05 21:15:49,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 21:15:49,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:15:49,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:15:49,212 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 21:15:49,242 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 21:15:49,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:15:49,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:15:49,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-05 21:15:49,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:15:49,424 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:15:49,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:15:49,490 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:15:49,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692925141] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:15:49,490 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:15:49,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 8 [2022-12-05 21:15:49,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086675956] [2022-12-05 21:15:49,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:15:49,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-05 21:15:49,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:15:49,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-05 21:15:49,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-12-05 21:15:49,491 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2022-12-05 21:15:49,491 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 137 transitions, 2105 flow. Second operand has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 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 21:15:49,491 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:15:49,491 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2022-12-05 21:15:49,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:15:49,869 INFO L130 PetriNetUnfolder]: 1938/2788 cut-off events. [2022-12-05 21:15:49,869 INFO L131 PetriNetUnfolder]: For 33800/34262 co-relation queries the response was YES. [2022-12-05 21:15:49,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19183 conditions, 2788 events. 1938/2788 cut-off events. For 33800/34262 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 12238 event pairs, 202 based on Foata normal form. 151/2832 useless extension candidates. Maximal degree in co-relation 18517. Up to 2155 conditions per place. [2022-12-05 21:15:49,886 INFO L137 encePairwiseOnDemand]: 17/22 looper letters, 152 selfloop transitions, 53 changer transitions 2/218 dead transitions. [2022-12-05 21:15:49,887 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 218 transitions, 3051 flow [2022-12-05 21:15:49,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-05 21:15:49,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-05 21:15:49,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 129 transitions. [2022-12-05 21:15:49,888 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6515151515151515 [2022-12-05 21:15:49,888 INFO L175 Difference]: Start difference. First operand has 79 places, 137 transitions, 2105 flow. Second operand 9 states and 129 transitions. [2022-12-05 21:15:49,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 218 transitions, 3051 flow [2022-12-05 21:15:49,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 218 transitions, 2781 flow, removed 126 selfloop flow, removed 1 redundant places. [2022-12-05 21:15:49,917 INFO L231 Difference]: Finished difference. Result has 89 places, 158 transitions, 2343 flow [2022-12-05 21:15:49,917 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1835, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2343, PETRI_PLACES=89, PETRI_TRANSITIONS=158} [2022-12-05 21:15:49,918 INFO L294 CegarLoopForPetriNet]: 29 programPoint places, 60 predicate places. [2022-12-05 21:15:49,918 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 158 transitions, 2343 flow [2022-12-05 21:15:49,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 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 21:15:49,918 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:15:49,918 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:15:49,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-05 21:15:50,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:15:50,123 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 21:15:50,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:15:50,124 INFO L85 PathProgramCache]: Analyzing trace with hash -826786130, now seen corresponding path program 3 times [2022-12-05 21:15:50,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:15:50,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073699834] [2022-12-05 21:15:50,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:15:50,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:15:50,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:15:50,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:15:50,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:15:50,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073699834] [2022-12-05 21:15:50,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073699834] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:15:50,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990138741] [2022-12-05 21:15:50,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 21:15:50,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:15:50,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:15:50,309 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 21:15:50,336 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 21:15:50,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-05 21:15:50,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:15:50,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-05 21:15:50,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:15:50,503 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:15:50,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:15:50,593 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:15:50,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990138741] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:15:50,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:15:50,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 9 [2022-12-05 21:15:50,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382577577] [2022-12-05 21:15:50,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:15:50,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-05 21:15:50,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:15:50,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-05 21:15:50,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-12-05 21:15:50,594 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2022-12-05 21:15:50,594 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 158 transitions, 2343 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 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 21:15:50,594 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:15:50,594 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2022-12-05 21:15:50,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:15:51,040 INFO L130 PetriNetUnfolder]: 2458/3542 cut-off events. [2022-12-05 21:15:51,041 INFO L131 PetriNetUnfolder]: For 44191/44747 co-relation queries the response was YES. [2022-12-05 21:15:51,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23741 conditions, 3542 events. 2458/3542 cut-off events. For 44191/44747 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 16152 event pairs, 372 based on Foata normal form. 175/3582 useless extension candidates. Maximal degree in co-relation 23303. Up to 2903 conditions per place. [2022-12-05 21:15:51,065 INFO L137 encePairwiseOnDemand]: 17/22 looper letters, 183 selfloop transitions, 61 changer transitions 2/257 dead transitions. [2022-12-05 21:15:51,066 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 257 transitions, 3744 flow [2022-12-05 21:15:51,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-05 21:15:51,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-05 21:15:51,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 125 transitions. [2022-12-05 21:15:51,066 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6313131313131313 [2022-12-05 21:15:51,067 INFO L175 Difference]: Start difference. First operand has 89 places, 158 transitions, 2343 flow. Second operand 9 states and 125 transitions. [2022-12-05 21:15:51,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 257 transitions, 3744 flow [2022-12-05 21:15:51,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 257 transitions, 3482 flow, removed 112 selfloop flow, removed 2 redundant places. [2022-12-05 21:15:51,104 INFO L231 Difference]: Finished difference. Result has 99 places, 201 transitions, 3054 flow [2022-12-05 21:15:51,105 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=2081, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3054, PETRI_PLACES=99, PETRI_TRANSITIONS=201} [2022-12-05 21:15:51,105 INFO L294 CegarLoopForPetriNet]: 29 programPoint places, 70 predicate places. [2022-12-05 21:15:51,105 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 201 transitions, 3054 flow [2022-12-05 21:15:51,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 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 21:15:51,106 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:15:51,106 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:15:51,113 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 21:15:51,311 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,SelfDestructingSolverStorable13 [2022-12-05 21:15:51,311 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 21:15:51,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:15:51,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1555308958, now seen corresponding path program 4 times [2022-12-05 21:15:51,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:15:51,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113880142] [2022-12-05 21:15:51,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:15:51,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:15:51,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:15:51,500 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:15:51,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:15:51,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113880142] [2022-12-05 21:15:51,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113880142] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:15:51,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435169022] [2022-12-05 21:15:51,500 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 21:15:51,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:15:51,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:15:51,501 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 21:15:51,503 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 21:15:51,583 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 21:15:51,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:15:51,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-05 21:15:51,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:15:51,660 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:15:51,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:15:51,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:15:51,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435169022] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:15:51,728 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:15:51,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 7 [2022-12-05 21:15:51,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818231930] [2022-12-05 21:15:51,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:15:51,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-05 21:15:51,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:15:51,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-05 21:15:51,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-12-05 21:15:51,729 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2022-12-05 21:15:51,729 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 201 transitions, 3054 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 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 21:15:51,729 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:15:51,729 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2022-12-05 21:15:51,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:15:52,270 INFO L130 PetriNetUnfolder]: 2766/3994 cut-off events. [2022-12-05 21:15:52,270 INFO L131 PetriNetUnfolder]: For 50168/50742 co-relation queries the response was YES. [2022-12-05 21:15:52,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26466 conditions, 3994 events. 2766/3994 cut-off events. For 50168/50742 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 18649 event pairs, 516 based on Foata normal form. 173/4027 useless extension candidates. Maximal degree in co-relation 25993. Up to 3487 conditions per place. [2022-12-05 21:15:52,297 INFO L137 encePairwiseOnDemand]: 17/22 looper letters, 198 selfloop transitions, 59 changer transitions 2/270 dead transitions. [2022-12-05 21:15:52,297 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 270 transitions, 4114 flow [2022-12-05 21:15:52,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-05 21:15:52,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-05 21:15:52,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 119 transitions. [2022-12-05 21:15:52,298 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.601010101010101 [2022-12-05 21:15:52,298 INFO L175 Difference]: Start difference. First operand has 99 places, 201 transitions, 3054 flow. Second operand 9 states and 119 transitions. [2022-12-05 21:15:52,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 270 transitions, 4114 flow [2022-12-05 21:15:52,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 270 transitions, 3756 flow, removed 170 selfloop flow, removed 1 redundant places. [2022-12-05 21:15:52,345 INFO L231 Difference]: Finished difference. Result has 109 places, 220 transitions, 3232 flow [2022-12-05 21:15:52,345 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=2696, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3232, PETRI_PLACES=109, PETRI_TRANSITIONS=220} [2022-12-05 21:15:52,346 INFO L294 CegarLoopForPetriNet]: 29 programPoint places, 80 predicate places. [2022-12-05 21:15:52,346 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 220 transitions, 3232 flow [2022-12-05 21:15:52,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 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 21:15:52,346 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:15:52,346 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:15:52,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-05 21:15:52,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-05 21:15:52,552 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 21:15:52,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:15:52,552 INFO L85 PathProgramCache]: Analyzing trace with hash 2036497856, now seen corresponding path program 5 times [2022-12-05 21:15:52,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:15:52,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314451539] [2022-12-05 21:15:52,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:15:52,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:15:52,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:15:52,690 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:15:52,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:15:52,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314451539] [2022-12-05 21:15:52,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314451539] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:15:52,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170028773] [2022-12-05 21:15:52,690 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 21:15:52,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:15:52,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:15:52,691 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 21:15:52,693 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 21:15:52,762 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-05 21:15:52,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:15:52,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-05 21:15:52,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:15:52,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:15:52,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:15:52,937 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:15:52,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170028773] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:15:52,937 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:15:52,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 7 [2022-12-05 21:15:52,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265332195] [2022-12-05 21:15:52,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:15:52,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-05 21:15:52,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:15:52,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-05 21:15:52,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-12-05 21:15:52,940 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2022-12-05 21:15:52,940 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 220 transitions, 3232 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 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 21:15:52,940 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:15:52,940 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2022-12-05 21:15:52,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:15:53,510 INFO L130 PetriNetUnfolder]: 3140/4538 cut-off events. [2022-12-05 21:15:53,511 INFO L131 PetriNetUnfolder]: For 54317/54929 co-relation queries the response was YES. [2022-12-05 21:15:53,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29154 conditions, 4538 events. 3140/4538 cut-off events. For 54317/54929 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 21861 event pairs, 660 based on Foata normal form. 179/4563 useless extension candidates. Maximal degree in co-relation 28639. Up to 4043 conditions per place. [2022-12-05 21:15:53,627 INFO L137 encePairwiseOnDemand]: 17/22 looper letters, 237 selfloop transitions, 49 changer transitions 2/299 dead transitions. [2022-12-05 21:15:53,627 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 299 transitions, 4587 flow [2022-12-05 21:15:53,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-05 21:15:53,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-05 21:15:53,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 117 transitions. [2022-12-05 21:15:53,628 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2022-12-05 21:15:53,628 INFO L175 Difference]: Start difference. First operand has 109 places, 220 transitions, 3232 flow. Second operand 9 states and 117 transitions. [2022-12-05 21:15:53,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 299 transitions, 4587 flow [2022-12-05 21:15:53,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 299 transitions, 4278 flow, removed 132 selfloop flow, removed 2 redundant places. [2022-12-05 21:15:53,679 INFO L231 Difference]: Finished difference. Result has 119 places, 251 transitions, 3703 flow [2022-12-05 21:15:53,679 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=2923, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3703, PETRI_PLACES=119, PETRI_TRANSITIONS=251} [2022-12-05 21:15:53,680 INFO L294 CegarLoopForPetriNet]: 29 programPoint places, 90 predicate places. [2022-12-05 21:15:53,681 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 251 transitions, 3703 flow [2022-12-05 21:15:53,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 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 21:15:53,681 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:15:53,681 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:15:53,686 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 21:15:53,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:15:53,887 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 21:15:53,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:15:53,887 INFO L85 PathProgramCache]: Analyzing trace with hash -412670130, now seen corresponding path program 6 times [2022-12-05 21:15:53,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:15:53,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141363979] [2022-12-05 21:15:53,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:15:53,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:15:53,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:15:54,070 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:15:54,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:15:54,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141363979] [2022-12-05 21:15:54,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141363979] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:15:54,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898365564] [2022-12-05 21:15:54,070 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 21:15:54,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:15:54,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:15:54,072 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 21:15:54,074 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 21:15:54,152 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-05 21:15:54,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:15:54,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-05 21:15:54,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:15:54,229 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:15:54,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:15:54,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:15:54,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898365564] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:15:54,327 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:15:54,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 8 [2022-12-05 21:15:54,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554719056] [2022-12-05 21:15:54,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:15:54,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-05 21:15:54,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:15:54,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-05 21:15:54,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-12-05 21:15:54,328 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2022-12-05 21:15:54,328 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 251 transitions, 3703 flow. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 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 21:15:54,328 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:15:54,328 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2022-12-05 21:15:54,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:15:54,994 INFO L130 PetriNetUnfolder]: 3474/5028 cut-off events. [2022-12-05 21:15:54,994 INFO L131 PetriNetUnfolder]: For 61521/62119 co-relation queries the response was YES. [2022-12-05 21:15:55,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32169 conditions, 5028 events. 3474/5028 cut-off events. For 61521/62119 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 24783 event pairs, 812 based on Foata normal form. 187/5057 useless extension candidates. Maximal degree in co-relation 31619. Up to 4501 conditions per place. [2022-12-05 21:15:55,027 INFO L137 encePairwiseOnDemand]: 17/22 looper letters, 258 selfloop transitions, 49 changer transitions 2/320 dead transitions. [2022-12-05 21:15:55,027 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 320 transitions, 4943 flow [2022-12-05 21:15:55,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-05 21:15:55,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-05 21:15:55,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 119 transitions. [2022-12-05 21:15:55,028 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.601010101010101 [2022-12-05 21:15:55,028 INFO L175 Difference]: Start difference. First operand has 119 places, 251 transitions, 3703 flow. Second operand 9 states and 119 transitions. [2022-12-05 21:15:55,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 320 transitions, 4943 flow [2022-12-05 21:15:55,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 320 transitions, 4551 flow, removed 187 selfloop flow, removed 1 redundant places. [2022-12-05 21:15:55,098 INFO L231 Difference]: Finished difference. Result has 129 places, 270 transitions, 3887 flow [2022-12-05 21:15:55,098 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=3311, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3887, PETRI_PLACES=129, PETRI_TRANSITIONS=270} [2022-12-05 21:15:55,098 INFO L294 CegarLoopForPetriNet]: 29 programPoint places, 100 predicate places. [2022-12-05 21:15:55,098 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 270 transitions, 3887 flow [2022-12-05 21:15:55,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 10 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 21:15:55,098 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:15:55,099 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:15:55,112 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-05 21:15:55,312 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,SelfDestructingSolverStorable16 [2022-12-05 21:15:55,313 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 21:15:55,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:15:55,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1717911359, now seen corresponding path program 7 times [2022-12-05 21:15:55,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:15:55,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408778821] [2022-12-05 21:15:55,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:15:55,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:15:55,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:15:55,396 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:15:55,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:15:55,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408778821] [2022-12-05 21:15:55,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408778821] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:15:55,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009741277] [2022-12-05 21:15:55,396 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-05 21:15:55,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:15:55,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:15:55,398 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 21:15:55,400 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 21:15:55,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:15:55,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-05 21:15:55,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:15:55,497 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:15:55,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:15:55,539 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:15:55,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009741277] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:15:55,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:15:55,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2022-12-05 21:15:55,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083103455] [2022-12-05 21:15:55,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:15:55,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-05 21:15:55,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:15:55,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-05 21:15:55,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-12-05 21:15:55,540 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 22 [2022-12-05 21:15:55,540 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 270 transitions, 3887 flow. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 21:15:55,540 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:15:55,540 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 22 [2022-12-05 21:15:55,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:15:56,965 INFO L130 PetriNetUnfolder]: 6601/9658 cut-off events. [2022-12-05 21:15:56,965 INFO L131 PetriNetUnfolder]: For 110813/111194 co-relation queries the response was YES. [2022-12-05 21:15:56,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58939 conditions, 9658 events. 6601/9658 cut-off events. For 110813/111194 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 51248 event pairs, 1189 based on Foata normal form. 251/9843 useless extension candidates. Maximal degree in co-relation 57189. Up to 2753 conditions per place. [2022-12-05 21:15:57,023 INFO L137 encePairwiseOnDemand]: 17/22 looper letters, 401 selfloop transitions, 113 changer transitions 0/518 dead transitions. [2022-12-05 21:15:57,023 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 518 transitions, 8013 flow [2022-12-05 21:15:57,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-05 21:15:57,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-05 21:15:57,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 130 transitions. [2022-12-05 21:15:57,025 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2022-12-05 21:15:57,025 INFO L175 Difference]: Start difference. First operand has 129 places, 270 transitions, 3887 flow. Second operand 10 states and 130 transitions. [2022-12-05 21:15:57,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 518 transitions, 8013 flow [2022-12-05 21:15:57,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 518 transitions, 7379 flow, removed 297 selfloop flow, removed 2 redundant places. [2022-12-05 21:15:57,159 INFO L231 Difference]: Finished difference. Result has 143 places, 322 transitions, 4706 flow [2022-12-05 21:15:57,159 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=3505, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4706, PETRI_PLACES=143, PETRI_TRANSITIONS=322} [2022-12-05 21:15:57,160 INFO L294 CegarLoopForPetriNet]: 29 programPoint places, 114 predicate places. [2022-12-05 21:15:57,160 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 322 transitions, 4706 flow [2022-12-05 21:15:57,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 21:15:57,160 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:15:57,160 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:15:57,167 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 21:15:57,364 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,SelfDestructingSolverStorable17 [2022-12-05 21:15:57,365 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 21:15:57,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:15:57,365 INFO L85 PathProgramCache]: Analyzing trace with hash 591094472, now seen corresponding path program 8 times [2022-12-05 21:15:57,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:15:57,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77414282] [2022-12-05 21:15:57,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:15:57,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:15:57,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:15:57,458 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:15:57,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:15:57,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77414282] [2022-12-05 21:15:57,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77414282] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:15:57,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726252999] [2022-12-05 21:15:57,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 21:15:57,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:15:57,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:15:57,459 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 21:15:57,491 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 21:15:57,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:15:57,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:15:57,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-05 21:15:57,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:15:57,587 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:15:57,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:15:57,634 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:15:57,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726252999] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:15:57,634 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:15:57,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-12-05 21:15:57,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883507812] [2022-12-05 21:15:57,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:15:57,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-05 21:15:57,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:15:57,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-05 21:15:57,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-12-05 21:15:57,635 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 22 [2022-12-05 21:15:57,637 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 322 transitions, 4706 flow. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 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 21:15:57,637 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:15:57,637 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 22 [2022-12-05 21:15:57,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:15:59,306 INFO L130 PetriNetUnfolder]: 7208/10773 cut-off events. [2022-12-05 21:15:59,306 INFO L131 PetriNetUnfolder]: For 154460/154926 co-relation queries the response was YES. [2022-12-05 21:15:59,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66231 conditions, 10773 events. 7208/10773 cut-off events. For 154460/154926 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 62076 event pairs, 1112 based on Foata normal form. 401/11128 useless extension candidates. Maximal degree in co-relation 64225. Up to 3800 conditions per place. [2022-12-05 21:15:59,370 INFO L137 encePairwiseOnDemand]: 16/22 looper letters, 585 selfloop transitions, 167 changer transitions 0/756 dead transitions. [2022-12-05 21:15:59,371 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 756 transitions, 11486 flow [2022-12-05 21:15:59,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-05 21:15:59,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-05 21:15:59,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 136 transitions. [2022-12-05 21:15:59,372 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5151515151515151 [2022-12-05 21:15:59,372 INFO L175 Difference]: Start difference. First operand has 143 places, 322 transitions, 4706 flow. Second operand 12 states and 136 transitions. [2022-12-05 21:15:59,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 756 transitions, 11486 flow [2022-12-05 21:15:59,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 756 transitions, 11353 flow, removed 26 selfloop flow, removed 2 redundant places. [2022-12-05 21:15:59,633 INFO L231 Difference]: Finished difference. Result has 158 places, 417 transitions, 6590 flow [2022-12-05 21:15:59,634 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=4605, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6590, PETRI_PLACES=158, PETRI_TRANSITIONS=417} [2022-12-05 21:15:59,634 INFO L294 CegarLoopForPetriNet]: 29 programPoint places, 129 predicate places. [2022-12-05 21:15:59,634 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 417 transitions, 6590 flow [2022-12-05 21:15:59,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 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 21:15:59,634 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:15:59,634 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:15:59,639 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 21:15:59,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:15:59,839 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 21:15:59,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:15:59,839 INFO L85 PathProgramCache]: Analyzing trace with hash -848038708, now seen corresponding path program 9 times [2022-12-05 21:15:59,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:15:59,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8595942] [2022-12-05 21:15:59,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:15:59,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:15:59,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:15:59,931 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:15:59,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:15:59,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8595942] [2022-12-05 21:15:59,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8595942] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:15:59,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893908558] [2022-12-05 21:15:59,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 21:15:59,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:15:59,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:15:59,933 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 21:15:59,935 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 21:16:00,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-05 21:16:00,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:16:00,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-05 21:16:00,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:16:00,039 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:16:00,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:16:00,082 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:16:00,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893908558] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:16:00,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:16:00,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-12-05 21:16:00,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89662481] [2022-12-05 21:16:00,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:16:00,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-05 21:16:00,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:16:00,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-05 21:16:00,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-12-05 21:16:00,083 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-05 21:16:00,083 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 417 transitions, 6590 flow. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 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 21:16:00,083 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:16:00,083 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-05 21:16:00,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:16:02,958 INFO L130 PetriNetUnfolder]: 10791/16120 cut-off events. [2022-12-05 21:16:02,958 INFO L131 PetriNetUnfolder]: For 263829/263829 co-relation queries the response was YES. [2022-12-05 21:16:03,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117719 conditions, 16120 events. 10791/16120 cut-off events. For 263829/263829 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 97295 event pairs, 1485 based on Foata normal form. 136/16256 useless extension candidates. Maximal degree in co-relation 115079. Up to 4657 conditions per place. [2022-12-05 21:16:03,203 INFO L137 encePairwiseOnDemand]: 15/22 looper letters, 520 selfloop transitions, 334 changer transitions 0/854 dead transitions. [2022-12-05 21:16:03,203 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 854 transitions, 15282 flow [2022-12-05 21:16:03,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-05 21:16:03,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-05 21:16:03,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 192 transitions. [2022-12-05 21:16:03,208 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.45933014354066987 [2022-12-05 21:16:03,208 INFO L175 Difference]: Start difference. First operand has 158 places, 417 transitions, 6590 flow. Second operand 19 states and 192 transitions. [2022-12-05 21:16:03,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 854 transitions, 15282 flow [2022-12-05 21:16:04,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 854 transitions, 14512 flow, removed 287 selfloop flow, removed 1 redundant places. [2022-12-05 21:16:04,145 INFO L231 Difference]: Finished difference. Result has 187 places, 583 transitions, 10691 flow [2022-12-05 21:16:04,146 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=6186, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=10691, PETRI_PLACES=187, PETRI_TRANSITIONS=583} [2022-12-05 21:16:04,146 INFO L294 CegarLoopForPetriNet]: 29 programPoint places, 158 predicate places. [2022-12-05 21:16:04,146 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 583 transitions, 10691 flow [2022-12-05 21:16:04,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 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 21:16:04,146 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:16:04,149 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:16:04,156 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 21:16:04,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:16:04,353 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 21:16:04,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:16:04,354 INFO L85 PathProgramCache]: Analyzing trace with hash -840626091, now seen corresponding path program 10 times [2022-12-05 21:16:04,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:16:04,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080308861] [2022-12-05 21:16:04,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:16:04,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:16:04,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:16:04,501 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:16:04,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:16:04,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080308861] [2022-12-05 21:16:04,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080308861] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:16:04,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465675144] [2022-12-05 21:16:04,501 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 21:16:04,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:16:04,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:16:04,517 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 21:16:04,543 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 21:16:04,602 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 21:16:04,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:16:04,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-05 21:16:04,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:16:04,652 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:16:04,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:16:04,712 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:16:04,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465675144] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:16:04,712 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:16:04,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-12-05 21:16:04,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691168686] [2022-12-05 21:16:04,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:16:04,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-05 21:16:04,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:16:04,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-05 21:16:04,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-12-05 21:16:04,714 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 22 [2022-12-05 21:16:04,714 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 583 transitions, 10691 flow. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 21:16:04,714 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:16:04,714 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 22 [2022-12-05 21:16:04,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:16:08,022 INFO L130 PetriNetUnfolder]: 11180/17150 cut-off events. [2022-12-05 21:16:08,022 INFO L131 PetriNetUnfolder]: For 401821/402127 co-relation queries the response was YES. [2022-12-05 21:16:08,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133100 conditions, 17150 events. 11180/17150 cut-off events. For 401821/402127 co-relation queries the response was YES. Maximal size of possible extension queue 761. Compared 111440 event pairs, 2298 based on Foata normal form. 651/17759 useless extension candidates. Maximal degree in co-relation 129887. Up to 6948 conditions per place. [2022-12-05 21:16:08,232 INFO L137 encePairwiseOnDemand]: 16/22 looper letters, 641 selfloop transitions, 332 changer transitions 62/1042 dead transitions. [2022-12-05 21:16:08,232 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 1042 transitions, 20190 flow [2022-12-05 21:16:08,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-05 21:16:08,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-05 21:16:08,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 128 transitions. [2022-12-05 21:16:08,233 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.48484848484848486 [2022-12-05 21:16:08,233 INFO L175 Difference]: Start difference. First operand has 187 places, 583 transitions, 10691 flow. Second operand 12 states and 128 transitions. [2022-12-05 21:16:08,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 1042 transitions, 20190 flow [2022-12-05 21:16:09,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 1042 transitions, 19246 flow, removed 472 selfloop flow, removed 0 redundant places. [2022-12-05 21:16:09,574 INFO L231 Difference]: Finished difference. Result has 202 places, 701 transitions, 12875 flow [2022-12-05 21:16:09,575 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=10041, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=12875, PETRI_PLACES=202, PETRI_TRANSITIONS=701} [2022-12-05 21:16:09,575 INFO L294 CegarLoopForPetriNet]: 29 programPoint places, 173 predicate places. [2022-12-05 21:16:09,575 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 701 transitions, 12875 flow [2022-12-05 21:16:09,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 21:16:09,583 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:16:09,583 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:16:09,590 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 21:16:09,787 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,SelfDestructingSolverStorable20 [2022-12-05 21:16:09,787 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 21:16:09,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:16:09,788 INFO L85 PathProgramCache]: Analyzing trace with hash 445596076, now seen corresponding path program 11 times [2022-12-05 21:16:09,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:16:09,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882041904] [2022-12-05 21:16:09,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:16:09,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:16:09,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:16:09,901 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:16:09,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:16:09,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882041904] [2022-12-05 21:16:09,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882041904] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:16:09,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100248181] [2022-12-05 21:16:09,902 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 21:16:09,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:16:09,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:16:09,909 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 21:16:09,957 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 21:16:10,014 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-05 21:16:10,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:16:10,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-05 21:16:10,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:16:10,069 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:16:10,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:16:10,137 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:16:10,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100248181] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:16:10,137 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:16:10,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-12-05 21:16:10,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288315465] [2022-12-05 21:16:10,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:16:10,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-05 21:16:10,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:16:10,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-05 21:16:10,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-12-05 21:16:10,138 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-05 21:16:10,138 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 701 transitions, 12875 flow. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 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 21:16:10,138 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:16:10,138 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-05 21:16:10,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:16:17,151 INFO L130 PetriNetUnfolder]: 12581/19110 cut-off events. [2022-12-05 21:16:17,151 INFO L131 PetriNetUnfolder]: For 462545/462545 co-relation queries the response was YES. [2022-12-05 21:16:17,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163121 conditions, 19110 events. 12581/19110 cut-off events. For 462545/462545 co-relation queries the response was YES. Maximal size of possible extension queue 794. Compared 122778 event pairs, 1403 based on Foata normal form. 620/19730 useless extension candidates. Maximal degree in co-relation 159861. Up to 6025 conditions per place. [2022-12-05 21:16:17,312 INFO L137 encePairwiseOnDemand]: 13/22 looper letters, 810 selfloop transitions, 821 changer transitions 78/1709 dead transitions. [2022-12-05 21:16:17,312 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 1709 transitions, 32662 flow [2022-12-05 21:16:17,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-12-05 21:16:17,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2022-12-05 21:16:17,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 796 transitions. [2022-12-05 21:16:17,315 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4359255202628697 [2022-12-05 21:16:17,315 INFO L175 Difference]: Start difference. First operand has 202 places, 701 transitions, 12875 flow. Second operand 83 states and 796 transitions. [2022-12-05 21:16:17,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 1709 transitions, 32662 flow [2022-12-05 21:16:19,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 1709 transitions, 32062 flow, removed 300 selfloop flow, removed 0 redundant places. [2022-12-05 21:16:19,700 INFO L231 Difference]: Finished difference. Result has 330 places, 1048 transitions, 24858 flow [2022-12-05 21:16:19,700 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=12559, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=696, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=492, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=83, PETRI_FLOW=24858, PETRI_PLACES=330, PETRI_TRANSITIONS=1048} [2022-12-05 21:16:19,701 INFO L294 CegarLoopForPetriNet]: 29 programPoint places, 301 predicate places. [2022-12-05 21:16:19,701 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 1048 transitions, 24858 flow [2022-12-05 21:16:19,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 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 21:16:19,701 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:16:19,701 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:16:19,705 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-05 21:16:19,905 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,SelfDestructingSolverStorable21 [2022-12-05 21:16:19,905 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 21:16:19,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:16:19,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1131707035, now seen corresponding path program 12 times [2022-12-05 21:16:19,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:16:19,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420448681] [2022-12-05 21:16:19,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:16:19,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:16:19,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:16:20,090 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:16:20,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:16:20,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420448681] [2022-12-05 21:16:20,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420448681] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:16:20,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683055003] [2022-12-05 21:16:20,091 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 21:16:20,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:16:20,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:16:20,105 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 21:16:20,153 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 21:16:20,219 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-05 21:16:20,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:16:20,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-05 21:16:20,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:16:20,268 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:16:20,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:16:20,333 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:16:20,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683055003] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:16:20,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:16:20,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-12-05 21:16:20,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882660702] [2022-12-05 21:16:20,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:16:20,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-05 21:16:20,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:16:20,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-05 21:16:20,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-12-05 21:16:20,334 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-05 21:16:20,334 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 1048 transitions, 24858 flow. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 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 21:16:20,334 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:16:20,334 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-05 21:16:20,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:16:28,784 INFO L130 PetriNetUnfolder]: 15466/23227 cut-off events. [2022-12-05 21:16:28,785 INFO L131 PetriNetUnfolder]: For 980225/980225 co-relation queries the response was YES. [2022-12-05 21:16:28,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258862 conditions, 23227 events. 15466/23227 cut-off events. For 980225/980225 co-relation queries the response was YES. Maximal size of possible extension queue 965. Compared 150291 event pairs, 1755 based on Foata normal form. 222/23449 useless extension candidates. Maximal degree in co-relation 254535. Up to 8067 conditions per place. [2022-12-05 21:16:29,138 INFO L137 encePairwiseOnDemand]: 14/22 looper letters, 689 selfloop transitions, 1089 changer transitions 21/1799 dead transitions. [2022-12-05 21:16:29,138 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 1799 transitions, 46808 flow [2022-12-05 21:16:29,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-12-05 21:16:29,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-12-05 21:16:29,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 344 transitions. [2022-12-05 21:16:29,140 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.39090909090909093 [2022-12-05 21:16:29,140 INFO L175 Difference]: Start difference. First operand has 330 places, 1048 transitions, 24858 flow. Second operand 40 states and 344 transitions. [2022-12-05 21:16:29,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 1799 transitions, 46808 flow [2022-12-05 21:16:35,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 1799 transitions, 39522 flow, removed 3227 selfloop flow, removed 11 redundant places. [2022-12-05 21:16:36,020 INFO L231 Difference]: Finished difference. Result has 382 places, 1442 transitions, 32423 flow [2022-12-05 21:16:36,021 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=19819, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1042, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=724, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=32423, PETRI_PLACES=382, PETRI_TRANSITIONS=1442} [2022-12-05 21:16:36,021 INFO L294 CegarLoopForPetriNet]: 29 programPoint places, 353 predicate places. [2022-12-05 21:16:36,021 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 1442 transitions, 32423 flow [2022-12-05 21:16:36,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 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 21:16:36,021 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:16:36,021 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:16:36,038 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 21:16:36,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:16:36,225 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 21:16:36,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:16:36,226 INFO L85 PathProgramCache]: Analyzing trace with hash -256176798, now seen corresponding path program 13 times [2022-12-05 21:16:36,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:16:36,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082800542] [2022-12-05 21:16:36,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:16:36,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:16:36,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:16:36,326 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:16:36,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:16:36,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082800542] [2022-12-05 21:16:36,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082800542] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:16:36,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281578958] [2022-12-05 21:16:36,326 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-05 21:16:36,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:16:36,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:16:36,327 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 21:16:36,329 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 21:16:36,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:16:36,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-05 21:16:36,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:16:36,441 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:16:36,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:16:36,498 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:16:36,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281578958] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:16:36,498 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:16:36,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-12-05 21:16:36,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057979477] [2022-12-05 21:16:36,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:16:36,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-05 21:16:36,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:16:36,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-05 21:16:36,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-12-05 21:16:36,500 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 22 [2022-12-05 21:16:36,500 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 1442 transitions, 32423 flow. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 21:16:36,500 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:16:36,500 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 22 [2022-12-05 21:16:36,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:16:51,044 INFO L130 PetriNetUnfolder]: 22094/34438 cut-off events. [2022-12-05 21:16:51,044 INFO L131 PetriNetUnfolder]: For 1622199/1623413 co-relation queries the response was YES. [2022-12-05 21:16:51,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 375424 conditions, 34438 events. 22094/34438 cut-off events. For 1622199/1623413 co-relation queries the response was YES. Maximal size of possible extension queue 1557. Compared 257298 event pairs, 3282 based on Foata normal form. 901/35279 useless extension candidates. Maximal degree in co-relation 373274. Up to 10765 conditions per place. [2022-12-05 21:16:51,977 INFO L137 encePairwiseOnDemand]: 15/22 looper letters, 1402 selfloop transitions, 1158 changer transitions 38/2617 dead transitions. [2022-12-05 21:16:51,978 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 2617 transitions, 62160 flow [2022-12-05 21:16:51,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-05 21:16:51,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-05 21:16:51,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 255 transitions. [2022-12-05 21:16:51,981 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.551948051948052 [2022-12-05 21:16:51,981 INFO L175 Difference]: Start difference. First operand has 382 places, 1442 transitions, 32423 flow. Second operand 21 states and 255 transitions. [2022-12-05 21:16:51,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 2617 transitions, 62160 flow [2022-12-05 21:17:03,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 2617 transitions, 58437 flow, removed 1215 selfloop flow, removed 4 redundant places. [2022-12-05 21:17:03,947 INFO L231 Difference]: Finished difference. Result has 409 places, 1822 transitions, 41726 flow [2022-12-05 21:17:03,948 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=29840, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=793, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=41726, PETRI_PLACES=409, PETRI_TRANSITIONS=1822} [2022-12-05 21:17:03,948 INFO L294 CegarLoopForPetriNet]: 29 programPoint places, 380 predicate places. [2022-12-05 21:17:03,948 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 1822 transitions, 41726 flow [2022-12-05 21:17:03,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 21:17:03,948 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:17:03,948 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:17:03,953 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-05 21:17:04,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:17:04,153 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 21:17:04,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:17:04,153 INFO L85 PathProgramCache]: Analyzing trace with hash -2013481289, now seen corresponding path program 14 times [2022-12-05 21:17:04,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:17:04,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132395699] [2022-12-05 21:17:04,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:17:04,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:17:04,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:17:04,246 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:17:04,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:17:04,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132395699] [2022-12-05 21:17:04,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132395699] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:17:04,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922038918] [2022-12-05 21:17:04,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 21:17:04,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:17:04,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:17:04,248 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 21:17:04,275 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 21:17:04,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:17:04,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:17:04,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-05 21:17:04,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:17:04,386 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:17:04,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:17:04,438 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:17:04,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922038918] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:17:04,439 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:17:04,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-12-05 21:17:04,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124044112] [2022-12-05 21:17:04,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:17:04,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-05 21:17:04,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:17:04,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-05 21:17:04,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-12-05 21:17:04,440 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 22 [2022-12-05 21:17:04,440 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 1822 transitions, 41726 flow. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 21:17:04,440 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:17:04,440 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 22 [2022-12-05 21:17:04,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:17:30,168 INFO L130 PetriNetUnfolder]: 31549/50859 cut-off events. [2022-12-05 21:17:30,168 INFO L131 PetriNetUnfolder]: For 2590445/2591162 co-relation queries the response was YES. [2022-12-05 21:17:31,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 570522 conditions, 50859 events. 31549/50859 cut-off events. For 2590445/2591162 co-relation queries the response was YES. Maximal size of possible extension queue 2468. Compared 422733 event pairs, 5535 based on Foata normal form. 1395/52190 useless extension candidates. Maximal degree in co-relation 568508. Up to 18991 conditions per place. [2022-12-05 21:17:31,817 INFO L137 encePairwiseOnDemand]: 15/22 looper letters, 1625 selfloop transitions, 1679 changer transitions 68/3393 dead transitions. [2022-12-05 21:17:31,818 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 3393 transitions, 85621 flow [2022-12-05 21:17:31,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-05 21:17:31,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-05 21:17:31,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 235 transitions. [2022-12-05 21:17:31,819 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5086580086580087 [2022-12-05 21:17:31,819 INFO L175 Difference]: Start difference. First operand has 409 places, 1822 transitions, 41726 flow. Second operand 21 states and 235 transitions. [2022-12-05 21:17:31,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 3393 transitions, 85621 flow [2022-12-05 21:18:00,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 3393 transitions, 81588 flow, removed 1580 selfloop flow, removed 3 redundant places. [2022-12-05 21:18:00,577 INFO L231 Difference]: Finished difference. Result has 435 places, 2537 transitions, 63132 flow [2022-12-05 21:18:00,578 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=39724, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1815, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1047, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=572, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=63132, PETRI_PLACES=435, PETRI_TRANSITIONS=2537} [2022-12-05 21:18:00,579 INFO L294 CegarLoopForPetriNet]: 29 programPoint places, 406 predicate places. [2022-12-05 21:18:00,579 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 2537 transitions, 63132 flow [2022-12-05 21:18:00,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 21:18:00,579 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:18:00,579 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:18:00,586 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 21:18:00,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-05 21:18:00,784 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 21:18:00,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:18:00,784 INFO L85 PathProgramCache]: Analyzing trace with hash -279280675, now seen corresponding path program 15 times [2022-12-05 21:18:00,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:18:00,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073735749] [2022-12-05 21:18:00,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:18:00,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:18:00,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:18:00,855 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:18:00,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:18:00,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073735749] [2022-12-05 21:18:00,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073735749] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:18:00,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753575452] [2022-12-05 21:18:00,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 21:18:00,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:18:00,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:18:00,873 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 21:18:00,874 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 21:18:00,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-05 21:18:00,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:18:00,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-05 21:18:00,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:18:00,998 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:18:00,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:18:01,042 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:18:01,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753575452] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:18:01,043 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:18:01,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-12-05 21:18:01,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114509961] [2022-12-05 21:18:01,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:18:01,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-05 21:18:01,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:18:01,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-05 21:18:01,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-12-05 21:18:01,043 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 22 [2022-12-05 21:18:01,044 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 2537 transitions, 63132 flow. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 21:18:01,044 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:18:01,044 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 22 [2022-12-05 21:18:01,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:18:37,005 INFO L130 PetriNetUnfolder]: 34806/55761 cut-off events. [2022-12-05 21:18:37,005 INFO L131 PetriNetUnfolder]: For 3052323/3052323 co-relation queries the response was YES. [2022-12-05 21:18:38,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 645744 conditions, 55761 events. 34806/55761 cut-off events. For 3052323/3052323 co-relation queries the response was YES. Maximal size of possible extension queue 2734. Compared 461125 event pairs, 7432 based on Foata normal form. 550/56311 useless extension candidates. Maximal degree in co-relation 643992. Up to 21603 conditions per place. [2022-12-05 21:18:38,840 INFO L137 encePairwiseOnDemand]: 14/22 looper letters, 1443 selfloop transitions, 1676 changer transitions 11/3130 dead transitions. [2022-12-05 21:18:38,840 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 3130 transitions, 84573 flow [2022-12-05 21:18:38,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-05 21:18:38,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-05 21:18:38,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 258 transitions. [2022-12-05 21:18:38,841 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.48863636363636365 [2022-12-05 21:18:38,841 INFO L175 Difference]: Start difference. First operand has 435 places, 2537 transitions, 63132 flow. Second operand 24 states and 258 transitions. [2022-12-05 21:18:38,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 3130 transitions, 84573 flow [2022-12-05 21:19:24,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 3130 transitions, 81464 flow, removed 1156 selfloop flow, removed 4 redundant places. [2022-12-05 21:19:24,978 INFO L231 Difference]: Finished difference. Result has 469 places, 2699 transitions, 69358 flow [2022-12-05 21:19:24,980 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=60374, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1525, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=978, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=69358, PETRI_PLACES=469, PETRI_TRANSITIONS=2699} [2022-12-05 21:19:24,981 INFO L294 CegarLoopForPetriNet]: 29 programPoint places, 440 predicate places. [2022-12-05 21:19:24,981 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 2699 transitions, 69358 flow [2022-12-05 21:19:24,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 21:19:24,981 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:19:24,981 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:19:24,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-12-05 21:19:25,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-05 21:19:25,185 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-05 21:19:25,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:19:25,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1160072873, now seen corresponding path program 16 times [2022-12-05 21:19:25,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:19:25,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990925553] [2022-12-05 21:19:25,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:19:25,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:19:25,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:19:25,290 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:19:25,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:19:25,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990925553] [2022-12-05 21:19:25,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990925553] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:19:25,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534020062] [2022-12-05 21:19:25,290 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 21:19:25,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:19:25,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:19:25,292 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 21:19:25,297 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 21:19:25,363 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 21:19:25,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:19:25,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-05 21:19:25,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:19:25,412 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:19:25,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:19:25,460 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:19:25,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534020062] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:19:25,461 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:19:25,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-12-05 21:19:25,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244734605] [2022-12-05 21:19:25,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:19:25,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-05 21:19:25,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:19:25,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-05 21:19:25,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-12-05 21:19:25,461 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 22 [2022-12-05 21:19:25,462 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 2699 transitions, 69358 flow. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 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 21:19:25,462 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:19:25,462 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 22 [2022-12-05 21:19:25,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand