/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf --traceabstraction.use.on-demand.petri.net.difference true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/stack-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-a802222-m [2022-12-11 20:47:43,338 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-11 20:47:43,339 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-11 20:47:43,362 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-11 20:47:43,363 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-11 20:47:43,363 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-11 20:47:43,364 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-11 20:47:43,365 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-11 20:47:43,366 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-11 20:47:43,367 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-11 20:47:43,368 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-11 20:47:43,368 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-11 20:47:43,369 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-11 20:47:43,369 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-11 20:47:43,370 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-11 20:47:43,370 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-11 20:47:43,371 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-11 20:47:43,371 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-11 20:47:43,372 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-11 20:47:43,374 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-11 20:47:43,374 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-11 20:47:43,375 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-11 20:47:43,376 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-11 20:47:43,376 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-11 20:47:43,379 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-11 20:47:43,379 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-11 20:47:43,379 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-11 20:47:43,379 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-11 20:47:43,380 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-11 20:47:43,380 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-11 20:47:43,380 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-11 20:47:43,381 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-11 20:47:43,381 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-11 20:47:43,382 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-11 20:47:43,382 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-11 20:47:43,382 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-11 20:47:43,383 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-11 20:47:43,383 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-11 20:47:43,383 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-11 20:47:43,384 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-11 20:47:43,384 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-11 20:47:43,385 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf [2022-12-11 20:47:43,400 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-11 20:47:43,400 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-11 20:47:43,401 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-11 20:47:43,401 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-11 20:47:43,402 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-11 20:47:43,402 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-11 20:47:43,402 INFO L138 SettingsManager]: * Use SBE=true [2022-12-11 20:47:43,402 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-11 20:47:43,402 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-11 20:47:43,402 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-11 20:47:43,402 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-11 20:47:43,402 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-11 20:47:43,403 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-11 20:47:43,403 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-11 20:47:43,403 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-11 20:47:43,403 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-11 20:47:43,403 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-11 20:47:43,403 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-11 20:47:43,403 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-11 20:47:43,404 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-11 20:47:43,404 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-11 20:47:43,404 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-11 20:47:43,404 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-11 20:47:43,404 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-11 20:47:43,404 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-11 20:47:43,404 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-11 20:47:43,405 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-11 20:47:43,405 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-12-11 20:47:43,405 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-11 20:47:43,405 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-11 20:47:43,405 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-11 20:47:43,405 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use on-demand Petri net difference -> true [2022-12-11 20:47:43,679 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-11 20:47:43,715 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-11 20:47:43,716 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-11 20:47:43,717 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-11 20:47:43,719 INFO L275 PluginConnector]: CDTParser initialized [2022-12-11 20:47:43,720 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack-1.i [2022-12-11 20:47:44,639 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-11 20:47:44,916 INFO L351 CDTParser]: Found 1 translation units. [2022-12-11 20:47:44,917 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack-1.i [2022-12-11 20:47:44,944 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c21919795/fef88ad0bef5436db93d41cdb7c9a5db/FLAGedefcd312 [2022-12-11 20:47:44,954 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c21919795/fef88ad0bef5436db93d41cdb7c9a5db [2022-12-11 20:47:44,956 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-11 20:47:44,957 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-11 20:47:44,958 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-11 20:47:44,958 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-11 20:47:44,960 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-11 20:47:44,960 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.12 08:47:44" (1/1) ... [2022-12-11 20:47:44,961 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74174365 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 08:47:44, skipping insertion in model container [2022-12-11 20:47:44,961 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.12 08:47:44" (1/1) ... [2022-12-11 20:47:44,965 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-11 20:47:44,997 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-11 20:47:45,317 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack-1.i[41520,41533] [2022-12-11 20:47:45,343 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-11 20:47:45,352 INFO L203 MainTranslator]: Completed pre-run [2022-12-11 20:47:45,386 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack-1.i[41520,41533] [2022-12-11 20:47:45,395 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-11 20:47:45,456 INFO L208 MainTranslator]: Completed translation [2022-12-11 20:47:45,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 08:47:45 WrapperNode [2022-12-11 20:47:45,458 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-11 20:47:45,459 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-11 20:47:45,459 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-11 20:47:45,459 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-11 20:47:45,463 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 08:47:45" (1/1) ... [2022-12-11 20:47:45,488 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 08:47:45" (1/1) ... [2022-12-11 20:47:45,512 INFO L138 Inliner]: procedures = 277, calls = 43, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 152 [2022-12-11 20:47:45,513 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-11 20:47:45,513 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-11 20:47:45,513 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-11 20:47:45,514 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-11 20:47:45,519 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 08:47:45" (1/1) ... [2022-12-11 20:47:45,520 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 08:47:45" (1/1) ... [2022-12-11 20:47:45,533 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 08:47:45" (1/1) ... [2022-12-11 20:47:45,534 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 08:47:45" (1/1) ... [2022-12-11 20:47:45,538 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 08:47:45" (1/1) ... [2022-12-11 20:47:45,540 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 08:47:45" (1/1) ... [2022-12-11 20:47:45,541 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 08:47:45" (1/1) ... [2022-12-11 20:47:45,542 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 08:47:45" (1/1) ... [2022-12-11 20:47:45,545 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-11 20:47:45,545 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-11 20:47:45,546 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-11 20:47:45,546 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-11 20:47:45,546 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 08:47:45" (1/1) ... [2022-12-11 20:47:45,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-11 20:47:45,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 20:47:45,572 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) [2022-12-11 20:47:45,579 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 [2022-12-11 20:47:45,598 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-12-11 20:47:45,598 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-12-11 20:47:45,598 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-12-11 20:47:45,598 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-12-11 20:47:45,598 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-11 20:47:45,598 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-11 20:47:45,598 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-11 20:47:45,598 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-11 20:47:45,598 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-11 20:47:45,598 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-11 20:47:45,598 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-11 20:47:45,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-11 20:47:45,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-11 20:47:45,599 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-11 20:47:45,717 INFO L236 CfgBuilder]: Building ICFG [2022-12-11 20:47:45,718 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-11 20:47:45,891 INFO L277 CfgBuilder]: Performing block encoding [2022-12-11 20:47:45,896 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-11 20:47:45,896 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-11 20:47:45,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.12 08:47:45 BoogieIcfgContainer [2022-12-11 20:47:45,898 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-11 20:47:45,899 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-11 20:47:45,899 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-11 20:47:45,901 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-11 20:47:45,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.12 08:47:44" (1/3) ... [2022-12-11 20:47:45,902 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76cd066d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.12 08:47:45, skipping insertion in model container [2022-12-11 20:47:45,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.12 08:47:45" (2/3) ... [2022-12-11 20:47:45,902 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76cd066d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.12 08:47:45, skipping insertion in model container [2022-12-11 20:47:45,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.12 08:47:45" (3/3) ... [2022-12-11 20:47:45,903 INFO L112 eAbstractionObserver]: Analyzing ICFG stack-1.i [2022-12-11 20:47:45,917 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-11 20:47:45,917 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-11 20:47:45,917 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-11 20:47:45,972 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-11 20:47:45,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 154 transitions, 324 flow [2022-12-11 20:47:46,036 INFO L130 PetriNetUnfolder]: 10/152 cut-off events. [2022-12-11 20:47:46,037 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-11 20:47:46,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 152 events. 10/152 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 353 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 110. Up to 3 conditions per place. [2022-12-11 20:47:46,044 INFO L82 GeneralOperation]: Start removeDead. Operand has 151 places, 154 transitions, 324 flow [2022-12-11 20:47:46,050 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 140 places, 143 transitions, 295 flow [2022-12-11 20:47:46,072 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-11 20:47:46,078 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;@316b9a8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-11 20:47:46,078 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-12-11 20:47:46,114 INFO L130 PetriNetUnfolder]: 5/121 cut-off events. [2022-12-11 20:47:46,114 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-11 20:47:46,114 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 20:47:46,115 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 20:47:46,115 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-11 20:47:46,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 20:47:46,118 INFO L85 PathProgramCache]: Analyzing trace with hash 915872, now seen corresponding path program 1 times [2022-12-11 20:47:46,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 20:47:46,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072182276] [2022-12-11 20:47:46,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 20:47:46,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 20:47:46,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 20:47:46,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:47:46,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 20:47:46,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072182276] [2022-12-11 20:47:46,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072182276] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-11 20:47:46,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-11 20:47:46,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-11 20:47:46,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260744253] [2022-12-11 20:47:46,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-11 20:47:46,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-11 20:47:46,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 20:47:46,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-11 20:47:46,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-11 20:47:46,435 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 154 [2022-12-11 20:47:46,438 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 143 transitions, 295 flow. Second operand has 3 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:47:46,438 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 20:47:46,438 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 154 [2022-12-11 20:47:46,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 20:47:46,542 INFO L130 PetriNetUnfolder]: 88/607 cut-off events. [2022-12-11 20:47:46,542 INFO L131 PetriNetUnfolder]: For 43/43 co-relation queries the response was YES. [2022-12-11 20:47:46,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 790 conditions, 607 events. 88/607 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2681 event pairs, 32 based on Foata normal form. 69/612 useless extension candidates. Maximal degree in co-relation 663. Up to 111 conditions per place. [2022-12-11 20:47:46,550 INFO L137 encePairwiseOnDemand]: 144/154 looper letters, 20 selfloop transitions, 3 changer transitions 0/141 dead transitions. [2022-12-11 20:47:46,550 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 141 transitions, 343 flow [2022-12-11 20:47:46,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-11 20:47:46,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-11 20:47:46,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 425 transitions. [2022-12-11 20:47:46,562 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.9199134199134199 [2022-12-11 20:47:46,566 INFO L295 CegarLoopForPetriNet]: 140 programPoint places, -2 predicate places. [2022-12-11 20:47:46,566 INFO L82 GeneralOperation]: Start removeDead. Operand has 138 places, 141 transitions, 343 flow [2022-12-11 20:47:46,570 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 138 places, 141 transitions, 343 flow [2022-12-11 20:47:46,571 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 141 transitions, 343 flow [2022-12-11 20:47:46,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:47:46,572 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 20:47:46,572 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 20:47:46,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-11 20:47:46,574 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-11 20:47:46,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 20:47:46,575 INFO L85 PathProgramCache]: Analyzing trace with hash 341206032, now seen corresponding path program 1 times [2022-12-11 20:47:46,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 20:47:46,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747757791] [2022-12-11 20:47:46,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 20:47:46,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 20:47:46,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 20:47:46,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:47:46,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 20:47:46,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747757791] [2022-12-11 20:47:46,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747757791] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-11 20:47:46,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-11 20:47:46,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-11 20:47:46,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383150450] [2022-12-11 20:47:46,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-11 20:47:46,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-11 20:47:46,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 20:47:46,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-11 20:47:46,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-11 20:47:46,732 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 154 [2022-12-11 20:47:46,733 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 141 transitions, 343 flow. Second operand has 4 states, 4 states have (on average 135.75) internal successors, (543), 4 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:47:46,733 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 20:47:46,733 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 154 [2022-12-11 20:47:46,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 20:47:46,877 INFO L130 PetriNetUnfolder]: 114/795 cut-off events. [2022-12-11 20:47:46,877 INFO L131 PetriNetUnfolder]: For 192/228 co-relation queries the response was YES. [2022-12-11 20:47:46,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1152 conditions, 795 events. 114/795 cut-off events. For 192/228 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 4169 event pairs, 38 based on Foata normal form. 6/721 useless extension candidates. Maximal degree in co-relation 911. Up to 140 conditions per place. [2022-12-11 20:47:46,883 INFO L137 encePairwiseOnDemand]: 149/154 looper letters, 19 selfloop transitions, 4 changer transitions 0/150 dead transitions. [2022-12-11 20:47:46,883 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 150 transitions, 427 flow [2022-12-11 20:47:46,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-11 20:47:46,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-11 20:47:46,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 557 transitions. [2022-12-11 20:47:46,885 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.9042207792207793 [2022-12-11 20:47:46,886 INFO L295 CegarLoopForPetriNet]: 140 programPoint places, 1 predicate places. [2022-12-11 20:47:46,887 INFO L82 GeneralOperation]: Start removeDead. Operand has 141 places, 150 transitions, 427 flow [2022-12-11 20:47:46,893 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 141 places, 150 transitions, 427 flow [2022-12-11 20:47:46,893 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 150 transitions, 427 flow [2022-12-11 20:47:46,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 135.75) internal successors, (543), 4 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:47:46,897 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 20:47:46,897 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 20:47:46,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-11 20:47:46,897 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-11 20:47:46,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 20:47:46,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1459601997, now seen corresponding path program 1 times [2022-12-11 20:47:46,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 20:47:46,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727755773] [2022-12-11 20:47:46,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 20:47:46,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 20:47:46,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 20:47:47,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:47:47,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 20:47:47,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727755773] [2022-12-11 20:47:47,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727755773] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-11 20:47:47,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-11 20:47:47,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-11 20:47:47,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738228409] [2022-12-11 20:47:47,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-11 20:47:47,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-11 20:47:47,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 20:47:47,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-11 20:47:47,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-11 20:47:47,021 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 154 [2022-12-11 20:47:47,022 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 150 transitions, 427 flow. Second operand has 3 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:47:47,022 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 20:47:47,022 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 154 [2022-12-11 20:47:47,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 20:47:47,193 INFO L130 PetriNetUnfolder]: 158/1124 cut-off events. [2022-12-11 20:47:47,193 INFO L131 PetriNetUnfolder]: For 446/536 co-relation queries the response was YES. [2022-12-11 20:47:47,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1896 conditions, 1124 events. 158/1124 cut-off events. For 446/536 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 6143 event pairs, 20 based on Foata normal form. 3/1020 useless extension candidates. Maximal degree in co-relation 1571. Up to 230 conditions per place. [2022-12-11 20:47:47,200 INFO L137 encePairwiseOnDemand]: 148/154 looper letters, 36 selfloop transitions, 4 changer transitions 0/163 dead transitions. [2022-12-11 20:47:47,200 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 163 transitions, 574 flow [2022-12-11 20:47:47,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-11 20:47:47,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-11 20:47:47,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 420 transitions. [2022-12-11 20:47:47,202 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.9090909090909091 [2022-12-11 20:47:47,203 INFO L295 CegarLoopForPetriNet]: 140 programPoint places, 3 predicate places. [2022-12-11 20:47:47,203 INFO L82 GeneralOperation]: Start removeDead. Operand has 143 places, 163 transitions, 574 flow [2022-12-11 20:47:47,206 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 143 places, 163 transitions, 574 flow [2022-12-11 20:47:47,207 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 163 transitions, 574 flow [2022-12-11 20:47:47,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:47:47,207 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 20:47:47,207 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 20:47:47,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-11 20:47:47,208 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-11 20:47:47,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 20:47:47,209 INFO L85 PathProgramCache]: Analyzing trace with hash 871675093, now seen corresponding path program 1 times [2022-12-11 20:47:47,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 20:47:47,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733795338] [2022-12-11 20:47:47,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 20:47:47,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 20:47:47,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 20:47:47,388 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:47:47,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 20:47:47,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733795338] [2022-12-11 20:47:47,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733795338] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 20:47:47,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236942385] [2022-12-11 20:47:47,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 20:47:47,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 20:47:47,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 20:47:47,392 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) [2022-12-11 20:47:47,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-11 20:47:47,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 20:47:47,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-11 20:47:47,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 20:47:47,675 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:47:47,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 20:47:47,781 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:47:47,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236942385] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 20:47:47,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 20:47:47,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-12-11 20:47:47,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296998236] [2022-12-11 20:47:47,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 20:47:47,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-11 20:47:47,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 20:47:47,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-11 20:47:47,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-11 20:47:47,785 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 154 [2022-12-11 20:47:47,787 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 163 transitions, 574 flow. Second operand has 10 states, 10 states have (on average 130.5) internal successors, (1305), 10 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:47:47,787 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 20:47:47,787 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 154 [2022-12-11 20:47:47,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 20:47:48,098 INFO L380 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([419] L1009-->L1011: Formula: (< 0 v_~top~0_8) InVars {~top~0=v_~top~0_8} OutVars{~top~0=v_~top~0_8} AuxVars[] AssignedVars[][173], [154#true, 26#L1023-4true, t1Thread1of1ForFork0InUse, t2Thread1of1ForFork1InUse, 157#true, 165#(<= 1 ~top~0), 28#L946-2true, 100#L1011true, 166#true]) [2022-12-11 20:47:48,099 INFO L382 tUnfolder$Statistics]: this new event has 160 ancestors and is cut-off event [2022-12-11 20:47:48,099 INFO L385 tUnfolder$Statistics]: existing Event has 144 ancestors and is cut-off event [2022-12-11 20:47:48,099 INFO L385 tUnfolder$Statistics]: existing Event has 141 ancestors and is cut-off event [2022-12-11 20:47:48,099 INFO L385 tUnfolder$Statistics]: existing Event has 136 ancestors and is cut-off event [2022-12-11 20:47:48,099 INFO L380 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([420] L1009-->L1009-1: Formula: (not (< 0 v_~top~0_7)) InVars {~top~0=v_~top~0_7} OutVars{~top~0=v_~top~0_7} AuxVars[] AssignedVars[][174], [154#true, 26#L1023-4true, 195#(<= ~top~0 0), t1Thread1of1ForFork0InUse, t2Thread1of1ForFork1InUse, 157#true, 28#L946-2true, 76#L1009-1true, 163#true]) [2022-12-11 20:47:48,099 INFO L382 tUnfolder$Statistics]: this new event has 160 ancestors and is cut-off event [2022-12-11 20:47:48,099 INFO L385 tUnfolder$Statistics]: existing Event has 144 ancestors and is cut-off event [2022-12-11 20:47:48,099 INFO L385 tUnfolder$Statistics]: existing Event has 141 ancestors and is cut-off event [2022-12-11 20:47:48,099 INFO L385 tUnfolder$Statistics]: existing Event has 136 ancestors and is cut-off event [2022-12-11 20:47:48,137 INFO L130 PetriNetUnfolder]: 423/2355 cut-off events. [2022-12-11 20:47:48,137 INFO L131 PetriNetUnfolder]: For 1576/1881 co-relation queries the response was YES. [2022-12-11 20:47:48,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4775 conditions, 2355 events. 423/2355 cut-off events. For 1576/1881 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 16135 event pairs, 26 based on Foata normal form. 24/2158 useless extension candidates. Maximal degree in co-relation 4134. Up to 583 conditions per place. [2022-12-11 20:47:48,149 INFO L137 encePairwiseOnDemand]: 145/154 looper letters, 114 selfloop transitions, 47 changer transitions 2/284 dead transitions. [2022-12-11 20:47:48,150 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 284 transitions, 1642 flow [2022-12-11 20:47:48,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-11 20:47:48,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-11 20:47:48,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2435 transitions. [2022-12-11 20:47:48,154 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.8784271284271284 [2022-12-11 20:47:48,155 INFO L295 CegarLoopForPetriNet]: 140 programPoint places, 20 predicate places. [2022-12-11 20:47:48,155 INFO L82 GeneralOperation]: Start removeDead. Operand has 160 places, 284 transitions, 1642 flow [2022-12-11 20:47:48,163 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 160 places, 282 transitions, 1616 flow [2022-12-11 20:47:48,163 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 282 transitions, 1616 flow [2022-12-11 20:47:48,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 130.5) internal successors, (1305), 10 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:47:48,164 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 20:47:48,164 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 20:47:48,171 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-12-11 20:47:48,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 20:47:48,369 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-11 20:47:48,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 20:47:48,369 INFO L85 PathProgramCache]: Analyzing trace with hash 2121639867, now seen corresponding path program 1 times [2022-12-11 20:47:48,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 20:47:48,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676287202] [2022-12-11 20:47:48,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 20:47:48,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 20:47:48,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 20:47:48,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:47:48,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 20:47:48,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676287202] [2022-12-11 20:47:48,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676287202] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-11 20:47:48,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-11 20:47:48,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-11 20:47:48,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054030709] [2022-12-11 20:47:48,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-11 20:47:48,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-11 20:47:48,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 20:47:48,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-11 20:47:48,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-11 20:47:48,501 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 154 [2022-12-11 20:47:48,502 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 282 transitions, 1616 flow. Second operand has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:47:48,502 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 20:47:48,502 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 154 [2022-12-11 20:47:48,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 20:47:48,596 INFO L130 PetriNetUnfolder]: 121/1011 cut-off events. [2022-12-11 20:47:48,596 INFO L131 PetriNetUnfolder]: For 1554/1554 co-relation queries the response was YES. [2022-12-11 20:47:48,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2224 conditions, 1011 events. 121/1011 cut-off events. For 1554/1554 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 5122 event pairs, 1 based on Foata normal form. 18/969 useless extension candidates. Maximal degree in co-relation 1691. Up to 199 conditions per place. [2022-12-11 20:47:48,601 INFO L137 encePairwiseOnDemand]: 150/154 looper letters, 43 selfloop transitions, 4 changer transitions 0/210 dead transitions. [2022-12-11 20:47:48,601 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 210 transitions, 1232 flow [2022-12-11 20:47:48,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-11 20:47:48,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-11 20:47:48,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 414 transitions. [2022-12-11 20:47:48,602 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.8961038961038961 [2022-12-11 20:47:48,604 INFO L295 CegarLoopForPetriNet]: 140 programPoint places, 14 predicate places. [2022-12-11 20:47:48,604 INFO L82 GeneralOperation]: Start removeDead. Operand has 154 places, 210 transitions, 1232 flow [2022-12-11 20:47:48,607 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 154 places, 210 transitions, 1232 flow [2022-12-11 20:47:48,608 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 210 transitions, 1232 flow [2022-12-11 20:47:48,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:47:48,609 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 20:47:48,609 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 20:47:48,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-11 20:47:48,609 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-11 20:47:48,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 20:47:48,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1129366177, now seen corresponding path program 1 times [2022-12-11 20:47:48,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 20:47:48,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319196772] [2022-12-11 20:47:48,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 20:47:48,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 20:47:48,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 20:47:49,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:47:49,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 20:47:49,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319196772] [2022-12-11 20:47:49,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319196772] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-11 20:47:49,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-11 20:47:49,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-12-11 20:47:49,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410541074] [2022-12-11 20:47:49,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-11 20:47:49,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-11 20:47:49,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 20:47:49,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-11 20:47:49,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2022-12-11 20:47:49,728 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 154 [2022-12-11 20:47:49,729 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 210 transitions, 1232 flow. Second operand has 24 states, 24 states have (on average 77.54166666666667) internal successors, (1861), 24 states have internal predecessors, (1861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:47:49,729 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 20:47:49,729 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 154 [2022-12-11 20:47:49,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 20:47:52,647 INFO L130 PetriNetUnfolder]: 1183/4026 cut-off events. [2022-12-11 20:47:52,647 INFO L131 PetriNetUnfolder]: For 7567/7569 co-relation queries the response was YES. [2022-12-11 20:47:52,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10653 conditions, 4026 events. 1183/4026 cut-off events. For 7567/7569 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 28545 event pairs, 91 based on Foata normal form. 1/3818 useless extension candidates. Maximal degree in co-relation 8199. Up to 1497 conditions per place. [2022-12-11 20:47:52,669 INFO L137 encePairwiseOnDemand]: 117/154 looper letters, 331 selfloop transitions, 61 changer transitions 46/505 dead transitions. [2022-12-11 20:47:52,670 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 505 transitions, 3800 flow [2022-12-11 20:47:52,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-12-11 20:47:52,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-12-11 20:47:52,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 3611 transitions. [2022-12-11 20:47:52,677 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5329102715466352 [2022-12-11 20:47:52,677 INFO L295 CegarLoopForPetriNet]: 140 programPoint places, 57 predicate places. [2022-12-11 20:47:52,678 INFO L82 GeneralOperation]: Start removeDead. Operand has 197 places, 505 transitions, 3800 flow [2022-12-11 20:47:52,689 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 197 places, 459 transitions, 3252 flow [2022-12-11 20:47:52,689 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 459 transitions, 3252 flow [2022-12-11 20:47:52,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 77.54166666666667) internal successors, (1861), 24 states have internal predecessors, (1861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:47:52,690 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 20:47:52,690 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 20:47:52,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-11 20:47:52,690 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-11 20:47:52,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 20:47:52,691 INFO L85 PathProgramCache]: Analyzing trace with hash -445654303, now seen corresponding path program 2 times [2022-12-11 20:47:52,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 20:47:52,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618495074] [2022-12-11 20:47:52,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 20:47:52,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 20:47:52,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 20:47:53,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:47:53,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 20:47:53,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618495074] [2022-12-11 20:47:53,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618495074] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-11 20:47:53,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-11 20:47:53,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-12-11 20:47:53,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147978442] [2022-12-11 20:47:53,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-11 20:47:53,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-11 20:47:53,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 20:47:53,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-11 20:47:53,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2022-12-11 20:47:53,713 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 154 [2022-12-11 20:47:53,715 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 459 transitions, 3252 flow. Second operand has 27 states, 27 states have (on average 66.55555555555556) internal successors, (1797), 27 states have internal predecessors, (1797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:47:53,715 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 20:47:53,715 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 154 [2022-12-11 20:47:53,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 20:47:56,471 INFO L130 PetriNetUnfolder]: 1685/6095 cut-off events. [2022-12-11 20:47:56,471 INFO L131 PetriNetUnfolder]: For 10516/10550 co-relation queries the response was YES. [2022-12-11 20:47:56,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19547 conditions, 6095 events. 1685/6095 cut-off events. For 10516/10550 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 46082 event pairs, 282 based on Foata normal form. 3/5814 useless extension candidates. Maximal degree in co-relation 15821. Up to 2314 conditions per place. [2022-12-11 20:47:56,498 INFO L137 encePairwiseOnDemand]: 116/154 looper letters, 652 selfloop transitions, 62 changer transitions 32/805 dead transitions. [2022-12-11 20:47:56,499 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 805 transitions, 7337 flow [2022-12-11 20:47:56,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-11 20:47:56,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-12-11 20:47:56,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2514 transitions. [2022-12-11 20:47:56,506 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.46641929499072354 [2022-12-11 20:47:56,507 INFO L295 CegarLoopForPetriNet]: 140 programPoint places, 91 predicate places. [2022-12-11 20:47:56,507 INFO L82 GeneralOperation]: Start removeDead. Operand has 231 places, 805 transitions, 7337 flow [2022-12-11 20:47:56,527 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 231 places, 773 transitions, 6937 flow [2022-12-11 20:47:56,528 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 773 transitions, 6937 flow [2022-12-11 20:47:56,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 66.55555555555556) internal successors, (1797), 27 states have internal predecessors, (1797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:47:56,528 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 20:47:56,528 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 20:47:56,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-11 20:47:56,529 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-11 20:47:56,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 20:47:56,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1589781279, now seen corresponding path program 3 times [2022-12-11 20:47:56,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 20:47:56,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183306637] [2022-12-11 20:47:56,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 20:47:56,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 20:47:56,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 20:47:57,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:47:57,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 20:47:57,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183306637] [2022-12-11 20:47:57,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183306637] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-11 20:47:57,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-11 20:47:57,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-12-11 20:47:57,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463171253] [2022-12-11 20:47:57,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-11 20:47:57,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-11 20:47:57,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 20:47:57,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-11 20:47:57,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2022-12-11 20:47:57,543 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 154 [2022-12-11 20:47:57,544 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 773 transitions, 6937 flow. Second operand has 28 states, 28 states have (on average 65.46428571428571) internal successors, (1833), 28 states have internal predecessors, (1833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:47:57,544 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 20:47:57,545 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 154 [2022-12-11 20:47:57,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 20:48:00,597 INFO L130 PetriNetUnfolder]: 1906/6961 cut-off events. [2022-12-11 20:48:00,598 INFO L131 PetriNetUnfolder]: For 13731/13854 co-relation queries the response was YES. [2022-12-11 20:48:00,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26815 conditions, 6961 events. 1906/6961 cut-off events. For 13731/13854 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 55323 event pairs, 137 based on Foata normal form. 10/6644 useless extension candidates. Maximal degree in co-relation 22025. Up to 2934 conditions per place. [2022-12-11 20:48:00,633 INFO L137 encePairwiseOnDemand]: 118/154 looper letters, 781 selfloop transitions, 78 changer transitions 32/950 dead transitions. [2022-12-11 20:48:00,633 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 950 transitions, 10445 flow [2022-12-11 20:48:00,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-11 20:48:00,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-12-11 20:48:00,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2416 transitions. [2022-12-11 20:48:00,636 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4614209320091673 [2022-12-11 20:48:00,637 INFO L295 CegarLoopForPetriNet]: 140 programPoint places, 124 predicate places. [2022-12-11 20:48:00,637 INFO L82 GeneralOperation]: Start removeDead. Operand has 264 places, 950 transitions, 10445 flow [2022-12-11 20:48:00,662 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 264 places, 918 transitions, 9981 flow [2022-12-11 20:48:00,662 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 918 transitions, 9981 flow [2022-12-11 20:48:00,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 65.46428571428571) internal successors, (1833), 28 states have internal predecessors, (1833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:48:00,663 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 20:48:00,663 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 20:48:00,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-11 20:48:00,664 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-11 20:48:00,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 20:48:00,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1071742939, now seen corresponding path program 1 times [2022-12-11 20:48:00,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 20:48:00,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270366971] [2022-12-11 20:48:00,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 20:48:00,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 20:48:00,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 20:48:01,613 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:48:01,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 20:48:01,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270366971] [2022-12-11 20:48:01,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270366971] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 20:48:01,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247567309] [2022-12-11 20:48:01,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 20:48:01,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 20:48:01,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 20:48:01,615 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) [2022-12-11 20:48:01,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-11 20:48:01,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 20:48:01,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 63 conjunts are in the unsatisfiable core [2022-12-11 20:48:01,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 20:48:02,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2022-12-11 20:48:03,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 23 [2022-12-11 20:48:03,496 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:48:03,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 20:48:04,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2022-12-11 20:48:04,406 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-11 20:48:04,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247567309] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-11 20:48:04,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-11 20:48:04,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [26, 26] total 68 [2022-12-11 20:48:04,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706198176] [2022-12-11 20:48:04,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-11 20:48:04,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-11 20:48:04,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 20:48:04,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-11 20:48:04,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=4315, Unknown=0, NotChecked=0, Total=4556 [2022-12-11 20:48:04,410 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 154 [2022-12-11 20:48:04,411 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 918 transitions, 9981 flow. Second operand has 22 states, 22 states have (on average 78.63636363636364) internal successors, (1730), 22 states have internal predecessors, (1730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:48:04,411 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 20:48:04,411 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 154 [2022-12-11 20:48:04,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 20:48:10,004 INFO L130 PetriNetUnfolder]: 2588/9395 cut-off events. [2022-12-11 20:48:10,004 INFO L131 PetriNetUnfolder]: For 23126/23329 co-relation queries the response was YES. [2022-12-11 20:48:10,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42919 conditions, 9395 events. 2588/9395 cut-off events. For 23126/23329 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 81887 event pairs, 137 based on Foata normal form. 22/8964 useless extension candidates. Maximal degree in co-relation 35406. Up to 4583 conditions per place. [2022-12-11 20:48:10,063 INFO L137 encePairwiseOnDemand]: 121/154 looper letters, 972 selfloop transitions, 441 changer transitions 3/1483 dead transitions. [2022-12-11 20:48:10,063 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 1483 transitions, 20269 flow [2022-12-11 20:48:10,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-12-11 20:48:10,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2022-12-11 20:48:10,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 5204 transitions. [2022-12-11 20:48:10,069 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5198801198801198 [2022-12-11 20:48:10,070 INFO L295 CegarLoopForPetriNet]: 140 programPoint places, 188 predicate places. [2022-12-11 20:48:10,070 INFO L82 GeneralOperation]: Start removeDead. Operand has 328 places, 1483 transitions, 20269 flow [2022-12-11 20:48:10,106 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 328 places, 1480 transitions, 20239 flow [2022-12-11 20:48:10,107 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 1480 transitions, 20239 flow [2022-12-11 20:48:10,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 78.63636363636364) internal successors, (1730), 22 states have internal predecessors, (1730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:48:10,108 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 20:48:10,108 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 20:48:10,117 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-11 20:48:10,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-11 20:48:10,313 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-11 20:48:10,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 20:48:10,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1445154875, now seen corresponding path program 2 times [2022-12-11 20:48:10,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 20:48:10,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275820648] [2022-12-11 20:48:10,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 20:48:10,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 20:48:10,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 20:48:11,502 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:48:11,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 20:48:11,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275820648] [2022-12-11 20:48:11,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275820648] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 20:48:11,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878727082] [2022-12-11 20:48:11,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-11 20:48:11,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 20:48:11,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 20:48:11,504 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) [2022-12-11 20:48:11,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-11 20:48:11,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-11 20:48:11,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-11 20:48:11,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 63 conjunts are in the unsatisfiable core [2022-12-11 20:48:11,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 20:48:11,682 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-11 20:48:11,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-11 20:48:11,691 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-11 20:48:11,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-11 20:48:12,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2022-12-11 20:48:12,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 54 [2022-12-11 20:48:13,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 23 [2022-12-11 20:48:13,234 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-11 20:48:13,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 20:48:13,751 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_244 (Array Int Int))) (not (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_244) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (* c_~top~0 4))) 4294967296) 4294967294))) is different from false [2022-12-11 20:48:13,766 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-11 20:48:13,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-12-11 20:48:13,773 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-11 20:48:13,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2022-12-11 20:48:13,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-12-11 20:48:14,495 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-11 20:48:14,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-12-11 20:48:14,497 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-11 20:48:14,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878727082] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 20:48:14,498 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 20:48:14,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 26, 26] total 76 [2022-12-11 20:48:14,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236832687] [2022-12-11 20:48:14,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 20:48:14,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-12-11 20:48:14,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 20:48:14,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-12-11 20:48:14,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=5264, Unknown=1, NotChecked=146, Total=5700 [2022-12-11 20:48:14,502 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 154 [2022-12-11 20:48:14,506 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 1480 transitions, 20239 flow. Second operand has 76 states, 76 states have (on average 66.30263157894737) internal successors, (5039), 76 states have internal predecessors, (5039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:48:14,506 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 20:48:14,506 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 154 [2022-12-11 20:48:14,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 20:48:50,508 INFO L130 PetriNetUnfolder]: 3733/13652 cut-off events. [2022-12-11 20:48:50,509 INFO L131 PetriNetUnfolder]: For 39581/39921 co-relation queries the response was YES. [2022-12-11 20:48:50,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71057 conditions, 13652 events. 3733/13652 cut-off events. For 39581/39921 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 132270 event pairs, 89 based on Foata normal form. 5/13034 useless extension candidates. Maximal degree in co-relation 56372. Up to 7449 conditions per place. [2022-12-11 20:48:50,585 INFO L137 encePairwiseOnDemand]: 111/154 looper letters, 1496 selfloop transitions, 739 changer transitions 16/2310 dead transitions. [2022-12-11 20:48:50,585 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 2310 transitions, 36187 flow [2022-12-11 20:48:50,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2022-12-11 20:48:50,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2022-12-11 20:48:50,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 10090 transitions. [2022-12-11 20:48:50,594 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4367965367965368 [2022-12-11 20:48:50,595 INFO L295 CegarLoopForPetriNet]: 140 programPoint places, 337 predicate places. [2022-12-11 20:48:50,595 INFO L82 GeneralOperation]: Start removeDead. Operand has 477 places, 2310 transitions, 36187 flow [2022-12-11 20:48:50,656 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 475 places, 2294 transitions, 35904 flow [2022-12-11 20:48:50,657 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 2294 transitions, 35904 flow [2022-12-11 20:48:50,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 66.30263157894737) internal successors, (5039), 76 states have internal predecessors, (5039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:48:50,658 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 20:48:50,658 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 20:48:50,664 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-11 20:48:50,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 20:48:50,863 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-11 20:48:50,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 20:48:50,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1368540643, now seen corresponding path program 2 times [2022-12-11 20:48:50,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 20:48:50,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195039662] [2022-12-11 20:48:50,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 20:48:50,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 20:48:50,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 20:48:50,983 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 9 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:48:50,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 20:48:50,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195039662] [2022-12-11 20:48:50,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195039662] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 20:48:50,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120756712] [2022-12-11 20:48:50,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-11 20:48:50,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 20:48:50,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 20:48:50,989 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) [2022-12-11 20:48:50,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-11 20:48:51,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-11 20:48:51,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-11 20:48:51,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-11 20:48:51,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 20:48:51,232 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 9 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:48:51,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 20:48:51,368 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 9 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:48:51,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120756712] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 20:48:51,368 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 20:48:51,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-12-11 20:48:51,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183402497] [2022-12-11 20:48:51,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 20:48:51,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-11 20:48:51,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 20:48:51,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-11 20:48:51,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-12-11 20:48:51,370 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 154 [2022-12-11 20:48:51,372 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 2294 transitions, 35904 flow. Second operand has 13 states, 13 states have (on average 130.84615384615384) internal successors, (1701), 13 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:48:51,372 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 20:48:51,372 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 154 [2022-12-11 20:48:51,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 20:48:56,649 INFO L130 PetriNetUnfolder]: 4736/17050 cut-off events. [2022-12-11 20:48:56,649 INFO L131 PetriNetUnfolder]: For 63616/64094 co-relation queries the response was YES. [2022-12-11 20:48:56,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92885 conditions, 17050 events. 4736/17050 cut-off events. For 63616/64094 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 165117 event pairs, 103 based on Foata normal form. 1/16288 useless extension candidates. Maximal degree in co-relation 73562. Up to 9488 conditions per place. [2022-12-11 20:48:56,747 INFO L137 encePairwiseOnDemand]: 147/154 looper letters, 1155 selfloop transitions, 238 changer transitions 0/2634 dead transitions. [2022-12-11 20:48:56,747 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 2634 transitions, 45776 flow [2022-12-11 20:48:56,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-11 20:48:56,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-11 20:48:56,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2398 transitions. [2022-12-11 20:48:56,749 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.8650793650793651 [2022-12-11 20:48:56,749 INFO L295 CegarLoopForPetriNet]: 140 programPoint places, 352 predicate places. [2022-12-11 20:48:56,749 INFO L82 GeneralOperation]: Start removeDead. Operand has 492 places, 2634 transitions, 45776 flow [2022-12-11 20:48:56,831 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 492 places, 2634 transitions, 45776 flow [2022-12-11 20:48:56,831 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 2634 transitions, 45776 flow [2022-12-11 20:48:56,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 130.84615384615384) internal successors, (1701), 13 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:48:56,833 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 20:48:56,833 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 20:48:56,838 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-11 20:48:57,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 20:48:57,038 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-11 20:48:57,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 20:48:57,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1123596909, now seen corresponding path program 1 times [2022-12-11 20:48:57,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 20:48:57,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122816219] [2022-12-11 20:48:57,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 20:48:57,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 20:48:57,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 20:48:57,144 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 6 proven. 46 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-11 20:48:57,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 20:48:57,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122816219] [2022-12-11 20:48:57,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122816219] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 20:48:57,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84019627] [2022-12-11 20:48:57,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 20:48:57,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 20:48:57,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 20:48:57,163 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) [2022-12-11 20:48:57,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-11 20:48:57,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 20:48:57,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-11 20:48:57,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 20:48:57,373 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 6 proven. 46 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-11 20:48:57,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 20:48:57,532 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 6 proven. 46 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-11 20:48:57,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84019627] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 20:48:57,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 20:48:57,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-12-11 20:48:57,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339475523] [2022-12-11 20:48:57,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 20:48:57,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-11 20:48:57,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 20:48:57,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-11 20:48:57,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-12-11 20:48:57,535 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 154 [2022-12-11 20:48:57,536 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 2634 transitions, 45776 flow. Second operand has 16 states, 16 states have (on average 129.375) internal successors, (2070), 16 states have internal predecessors, (2070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:48:57,536 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 20:48:57,536 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 154 [2022-12-11 20:48:57,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 20:49:04,099 INFO L130 PetriNetUnfolder]: 5214/18594 cut-off events. [2022-12-11 20:49:04,099 INFO L131 PetriNetUnfolder]: For 85642/86216 co-relation queries the response was YES. [2022-12-11 20:49:04,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105394 conditions, 18594 events. 5214/18594 cut-off events. For 85642/86216 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 181532 event pairs, 113 based on Foata normal form. 1/17753 useless extension candidates. Maximal degree in co-relation 81543. Up to 10434 conditions per place. [2022-12-11 20:49:04,204 INFO L137 encePairwiseOnDemand]: 144/154 looper letters, 1150 selfloop transitions, 431 changer transitions 0/2803 dead transitions. [2022-12-11 20:49:04,205 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 513 places, 2803 transitions, 52753 flow [2022-12-11 20:49:04,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-11 20:49:04,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-11 20:49:04,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2861 transitions. [2022-12-11 20:49:04,207 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.8444510035419126 [2022-12-11 20:49:04,207 INFO L295 CegarLoopForPetriNet]: 140 programPoint places, 373 predicate places. [2022-12-11 20:49:04,207 INFO L82 GeneralOperation]: Start removeDead. Operand has 513 places, 2803 transitions, 52753 flow [2022-12-11 20:49:04,289 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 513 places, 2803 transitions, 52753 flow [2022-12-11 20:49:04,289 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 2803 transitions, 52753 flow [2022-12-11 20:49:04,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 129.375) internal successors, (2070), 16 states have internal predecessors, (2070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:49:04,290 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 20:49:04,290 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 20:49:04,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-11 20:49:04,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-11 20:49:04,492 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-11 20:49:04,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 20:49:04,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1035613010, now seen corresponding path program 1 times [2022-12-11 20:49:04,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 20:49:04,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910435120] [2022-12-11 20:49:04,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 20:49:04,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 20:49:04,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 20:49:05,910 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:49:05,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 20:49:05,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910435120] [2022-12-11 20:49:05,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910435120] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 20:49:05,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558065312] [2022-12-11 20:49:05,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 20:49:05,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 20:49:05,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 20:49:05,912 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) [2022-12-11 20:49:05,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-11 20:49:06,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 20:49:06,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 86 conjunts are in the unsatisfiable core [2022-12-11 20:49:06,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 20:49:06,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2022-12-11 20:49:07,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-11 20:49:07,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 38 [2022-12-11 20:49:08,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 23 [2022-12-11 20:49:08,932 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:49:08,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 20:49:10,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 48 [2022-12-11 20:49:11,647 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:49:11,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558065312] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 20:49:11,648 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 20:49:11,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 34, 32] total 91 [2022-12-11 20:49:11,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649936300] [2022-12-11 20:49:11,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 20:49:11,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-12-11 20:49:11,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 20:49:11,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-12-11 20:49:11,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=653, Invalid=7537, Unknown=0, NotChecked=0, Total=8190 [2022-12-11 20:49:11,653 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 154 [2022-12-11 20:49:11,657 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 2803 transitions, 52753 flow. Second operand has 91 states, 91 states have (on average 78.31868131868131) internal successors, (7127), 91 states have internal predecessors, (7127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:49:11,657 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 20:49:11,657 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 154 [2022-12-11 20:49:11,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 20:50:09,431 INFO L130 PetriNetUnfolder]: 7900/28225 cut-off events. [2022-12-11 20:50:09,431 INFO L131 PetriNetUnfolder]: For 144396/145146 co-relation queries the response was YES. [2022-12-11 20:50:09,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178890 conditions, 28225 events. 7900/28225 cut-off events. For 144396/145146 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 292962 event pairs, 140 based on Foata normal form. 5/27035 useless extension candidates. Maximal degree in co-relation 134691. Up to 17034 conditions per place. [2022-12-11 20:50:09,608 INFO L137 encePairwiseOnDemand]: 114/154 looper letters, 4425 selfloop transitions, 1014 changer transitions 649/6155 dead transitions. [2022-12-11 20:50:09,609 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 699 places, 6155 transitions, 116071 flow [2022-12-11 20:50:09,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 187 states. [2022-12-11 20:50:09,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2022-12-11 20:50:09,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 15009 transitions. [2022-12-11 20:50:09,618 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5211820265296201 [2022-12-11 20:50:09,619 INFO L295 CegarLoopForPetriNet]: 140 programPoint places, 559 predicate places. [2022-12-11 20:50:09,619 INFO L82 GeneralOperation]: Start removeDead. Operand has 699 places, 6155 transitions, 116071 flow [2022-12-11 20:50:09,763 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 689 places, 5506 transitions, 100202 flow [2022-12-11 20:50:09,763 INFO L495 AbstractCegarLoop]: Abstraction has has 689 places, 5506 transitions, 100202 flow [2022-12-11 20:50:09,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 78.31868131868131) internal successors, (7127), 91 states have internal predecessors, (7127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:50:09,765 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 20:50:09,765 INFO L214 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 20:50:09,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-11 20:50:09,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 20:50:09,973 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-11 20:50:09,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 20:50:09,974 INFO L85 PathProgramCache]: Analyzing trace with hash 545807940, now seen corresponding path program 2 times [2022-12-11 20:50:09,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 20:50:09,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282412502] [2022-12-11 20:50:09,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 20:50:09,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 20:50:10,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 20:50:11,648 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:50:11,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 20:50:11,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282412502] [2022-12-11 20:50:11,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282412502] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 20:50:11,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943549435] [2022-12-11 20:50:11,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-11 20:50:11,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 20:50:11,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 20:50:11,650 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) [2022-12-11 20:50:11,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-11 20:50:11,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-11 20:50:11,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-11 20:50:11,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 81 conjunts are in the unsatisfiable core [2022-12-11 20:50:11,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 20:50:11,869 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-11 20:50:11,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-11 20:50:11,879 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-11 20:50:11,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-11 20:50:12,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2022-12-11 20:50:12,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 54 [2022-12-11 20:50:13,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-11 20:50:13,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 43 [2022-12-11 20:50:14,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 23 [2022-12-11 20:50:14,275 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:50:14,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 20:50:16,576 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-11 20:50:16,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-12-11 20:50:16,583 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-11 20:50:16,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2022-12-11 20:50:16,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-12-11 20:50:17,464 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-11 20:50:17,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-12-11 20:50:17,466 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:50:17,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943549435] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 20:50:17,466 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 20:50:17,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 94 [2022-12-11 20:50:17,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680828781] [2022-12-11 20:50:17,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 20:50:17,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-12-11 20:50:17,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 20:50:17,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-12-11 20:50:17,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=8359, Unknown=7, NotChecked=0, Total=8742 [2022-12-11 20:50:17,472 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 154 [2022-12-11 20:50:17,476 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 689 places, 5506 transitions, 100202 flow. Second operand has 94 states, 94 states have (on average 67.3936170212766) internal successors, (6335), 94 states have internal predecessors, (6335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:50:17,476 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 20:50:17,476 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 154 [2022-12-11 20:50:17,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 20:52:21,611 INFO L130 PetriNetUnfolder]: 11939/45590 cut-off events. [2022-12-11 20:52:21,611 INFO L131 PetriNetUnfolder]: For 218865/219742 co-relation queries the response was YES. [2022-12-11 20:52:21,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 309346 conditions, 45590 events. 11939/45590 cut-off events. For 218865/219742 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 516052 event pairs, 187 based on Foata normal form. 30/43878 useless extension candidates. Maximal degree in co-relation 258366. Up to 27831 conditions per place. [2022-12-11 20:52:21,947 INFO L137 encePairwiseOnDemand]: 113/154 looper letters, 6513 selfloop transitions, 4033 changer transitions 333/10938 dead transitions. [2022-12-11 20:52:21,948 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 956 places, 10938 transitions, 216106 flow [2022-12-11 20:52:21,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 268 states. [2022-12-11 20:52:21,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2022-12-11 20:52:21,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 18229 transitions. [2022-12-11 20:52:21,961 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.44167958906764876 [2022-12-11 20:52:21,961 INFO L295 CegarLoopForPetriNet]: 140 programPoint places, 816 predicate places. [2022-12-11 20:52:21,961 INFO L82 GeneralOperation]: Start removeDead. Operand has 956 places, 10938 transitions, 216106 flow [2022-12-11 20:52:22,241 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 956 places, 10605 transitions, 207157 flow [2022-12-11 20:52:22,241 INFO L495 AbstractCegarLoop]: Abstraction has has 956 places, 10605 transitions, 207157 flow [2022-12-11 20:52:22,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 67.3936170212766) internal successors, (6335), 94 states have internal predecessors, (6335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:52:22,243 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-11 20:52:22,243 INFO L214 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-11 20:52:22,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-11 20:52:22,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 20:52:22,448 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-11 20:52:22,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-11 20:52:22,449 INFO L85 PathProgramCache]: Analyzing trace with hash -149855713, now seen corresponding path program 3 times [2022-12-11 20:52:22,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-11 20:52:22,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905513180] [2022-12-11 20:52:22,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-11 20:52:22,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-11 20:52:22,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-11 20:52:24,353 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 173 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:52:24,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-11 20:52:24,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905513180] [2022-12-11 20:52:24,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905513180] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-11 20:52:24,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733016889] [2022-12-11 20:52:24,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-11 20:52:24,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-11 20:52:24,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-11 20:52:24,355 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) [2022-12-11 20:52:24,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-11 20:52:24,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-11 20:52:24,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-11 20:52:24,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 91 conjunts are in the unsatisfiable core [2022-12-11 20:52:24,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-11 20:52:25,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2022-12-11 20:52:25,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-11 20:52:25,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 43 [2022-12-11 20:52:26,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-11 20:52:26,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 43 [2022-12-11 20:52:27,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 23 [2022-12-11 20:52:28,115 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 12 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:52:28,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-11 20:52:32,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2022-12-11 20:52:33,019 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 12 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-11 20:52:33,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733016889] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-11 20:52:33,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-11 20:52:33,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 36] total 106 [2022-12-11 20:52:33,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934844981] [2022-12-11 20:52:33,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-11 20:52:33,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-12-11 20:52:33,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-11 20:52:33,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-12-11 20:52:33,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=10743, Unknown=0, NotChecked=0, Total=11130 [2022-12-11 20:52:33,025 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 154 [2022-12-11 20:52:33,029 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 956 places, 10605 transitions, 207157 flow. Second operand has 106 states, 106 states have (on average 79.0377358490566) internal successors, (8378), 106 states have internal predecessors, (8378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-11 20:52:33,030 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-11 20:52:33,030 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 154 [2022-12-11 20:52:33,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-11 20:53:08,953 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-11 20:55:03,535 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-11 20:55:10,786 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-11 20:58:06,685 WARN L233 SmtUtils]: Spent 6.06s on a formula simplification. DAG size of input: 169 DAG size of output: 147 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-11 20:59:12,024 WARN L233 SmtUtils]: Spent 5.06s on a formula simplification. DAG size of input: 155 DAG size of output: 142 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-11 21:00:38,883 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] Received shutdown request... [2022-12-11 21:01:30,934 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-11 21:01:30,962 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-11 21:01:31,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2022-12-11 21:01:31,038 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2022-12-11 21:01:31,044 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-11 21:01:31,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-11 21:01:31,242 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (106states, 75/154 universal loopers) in iteration 15,while PetriNetUnfolder was constructing finite prefix that currently has 296062 conditions, 39638 events (10182/39637 cut-off events. For 225995/226728 co-relation queries the response was YES. Maximal size of possible extension queue 616. Compared 493459 event pairs, 114 based on Foata normal form. 32/38805 useless extension candidates. Maximal degree in co-relation 250723. Up to 24756 conditions per place.). [2022-12-11 21:01:31,243 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2022-12-11 21:01:31,243 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2022-12-11 21:01:31,243 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-12-11 21:01:31,243 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-12-11 21:01:31,244 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-12-11 21:01:31,244 INFO L445 BasicCegarLoop]: Path program histogram: [3, 3, 2, 2, 1, 1, 1, 1, 1] [2022-12-11 21:01:31,247 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-11 21:01:31,247 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-11 21:01:31,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.12 09:01:31 BasicIcfg [2022-12-11 21:01:31,250 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-11 21:01:31,250 INFO L158 Benchmark]: Toolchain (without parser) took 826293.66ms. Allocated memory was 195.0MB in the beginning and 2.4GB in the end (delta: 2.2GB). Free memory was 169.2MB in the beginning and 1.0GB in the end (delta: -868.7MB). Peak memory consumption was 1.9GB. Max. memory is 8.0GB. [2022-12-11 21:01:31,251 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 127.9MB. Free memory was 111.0MB in the beginning and 111.0MB in the end (delta: 43.7kB). There was no memory consumed. Max. memory is 8.0GB. [2022-12-11 21:01:31,251 INFO L158 Benchmark]: CACSL2BoogieTranslator took 499.78ms. Allocated memory is still 195.0MB. Free memory was 169.2MB in the beginning and 171.6MB in the end (delta: -2.5MB). Peak memory consumption was 34.4MB. Max. memory is 8.0GB. [2022-12-11 21:01:31,251 INFO L158 Benchmark]: Boogie Procedure Inliner took 54.14ms. Allocated memory is still 195.0MB. Free memory was 171.6MB in the beginning and 169.0MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-11 21:01:31,251 INFO L158 Benchmark]: Boogie Preprocessor took 31.64ms. Allocated memory is still 195.0MB. Free memory was 169.0MB in the beginning and 166.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-11 21:01:31,251 INFO L158 Benchmark]: RCFGBuilder took 352.35ms. Allocated memory is still 195.0MB. Free memory was 166.9MB in the beginning and 150.1MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. [2022-12-11 21:01:31,251 INFO L158 Benchmark]: TraceAbstraction took 825351.06ms. Allocated memory was 195.0MB in the beginning and 2.4GB in the end (delta: 2.2GB). Free memory was 149.1MB in the beginning and 1.0GB in the end (delta: -888.8MB). Peak memory consumption was 1.8GB. Max. memory is 8.0GB. [2022-12-11 21:01:31,252 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 127.9MB. Free memory was 111.0MB in the beginning and 111.0MB in the end (delta: 43.7kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 499.78ms. Allocated memory is still 195.0MB. Free memory was 169.2MB in the beginning and 171.6MB in the end (delta: -2.5MB). Peak memory consumption was 34.4MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 54.14ms. Allocated memory is still 195.0MB. Free memory was 171.6MB in the beginning and 169.0MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 31.64ms. Allocated memory is still 195.0MB. Free memory was 169.0MB in the beginning and 166.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 352.35ms. Allocated memory is still 195.0MB. Free memory was 166.9MB in the beginning and 150.1MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. * TraceAbstraction took 825351.06ms. Allocated memory was 195.0MB in the beginning and 2.4GB in the end (delta: 2.2GB). Free memory was 149.1MB in the beginning and 1.0GB in the end (delta: -888.8MB). Peak memory consumption was 1.8GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 941]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (106states, 75/154 universal loopers) in iteration 15,while PetriNetUnfolder was constructing finite prefix that currently has 296062 conditions, 39638 events (10182/39637 cut-off events. For 225995/226728 co-relation queries the response was YES. Maximal size of possible extension queue 616. Compared 493459 event pairs, 114 based on Foata normal form. 32/38805 useless extension candidates. Maximal degree in co-relation 250723. Up to 24756 conditions per place.). - TimeoutResultAtElement [Line: 1022]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (106states, 75/154 universal loopers) in iteration 15,while PetriNetUnfolder was constructing finite prefix that currently has 296062 conditions, 39638 events (10182/39637 cut-off events. For 225995/226728 co-relation queries the response was YES. Maximal size of possible extension queue 616. Compared 493459 event pairs, 114 based on Foata normal form. 32/38805 useless extension candidates. Maximal degree in co-relation 250723. Up to 24756 conditions per place.). - TimeoutResultAtElement [Line: 1023]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (106states, 75/154 universal loopers) in iteration 15,while PetriNetUnfolder was constructing finite prefix that currently has 296062 conditions, 39638 events (10182/39637 cut-off events. For 225995/226728 co-relation queries the response was YES. Maximal size of possible extension queue 616. Compared 493459 event pairs, 114 based on Foata normal form. 32/38805 useless extension candidates. Maximal degree in co-relation 250723. Up to 24756 conditions per place.). - TimeoutResultAtElement [Line: 941]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (106states, 75/154 universal loopers) in iteration 15,while PetriNetUnfolder was constructing finite prefix that currently has 296062 conditions, 39638 events (10182/39637 cut-off events. For 225995/226728 co-relation queries the response was YES. Maximal size of possible extension queue 616. Compared 493459 event pairs, 114 based on Foata normal form. 32/38805 useless extension candidates. Maximal degree in co-relation 250723. Up to 24756 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 238 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.8s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 825.2s, OverallIterations: 15, TraceHistogramMax: 4, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 784.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 12 mSolverCounterUnknown, 20173 SdHoareTripleChecker+Valid, 101.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 20173 mSDsluCounter, 21748 SdHoareTripleChecker+Invalid, 96.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 265 IncrementalHoareTripleChecker+Unchecked, 20918 mSDsCounter, 743 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 65394 IncrementalHoareTripleChecker+Invalid, 66414 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 743 mSolverCounterUnsat, 830 mSDtfsCounter, 65394 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4088 GetRequests, 2358 SyntacticMatches, 29 SemanticMatches, 1701 ConstructedPredicates, 1 IntricatePredicates, 6 DeprecatedPredicates, 181011 ImplicationChecksByTransitivity, 537.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=207157occurred in iteration=14, InterpolantAutomatonStates: 854, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 14 MinimizatonAttempts, 26569 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 37.0s InterpolantComputationTime, 3096 NumberOfCodeBlocks, 3062 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 4308 ConstructedInterpolants, 100 QuantifiedInterpolants, 64080 SizeOfPredicates, 211 NumberOfNonLiveVariables, 2819 ConjunctsInSsa, 404 ConjunctsInUnsatCore, 31 InterpolantComputations, 8 PerfectInterpolantSequences, 205/1767 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown